vad, vag, vav, vah, vrh, vcd, vcg, vcv, vch · pdf filevad, vag, vah, vav, vrh, vcd, vcg, vcv,...

55
3 Edition 04.15 AGA Technical Information · GB All-purpose servo regulator for gaseous media with integrated safety valve Suitable for a max. inlet pressure of 500 mbar (7 psig) Minimum installation effort: no external impulse line required Setting options from two sides EU certified VAD, VAG: ANSI/CSA and AGA approved VAD, VAG, VAV, VAH: FM approved VAD, VAG, VAV: UL listed VAD, VAG, VAV, VAH: certified for systems up to SIL 3 and PL e Pressure regulators with solenoid valve VAD, VAG, VAV, VAH Flow rate regulator VRH Pressure regulators with double solenoid valve VCD, VCG, VCV, VCH

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Page 1: VAD, VAG, VAV, VAH, VRH, VCD, VCG, VCV, VCH · PDF fileVAD, VAG, VAH, VAV, VRH, VCD, VCG, VCV, VCH · Edition 04.15 6 VAD VAD VAS 1 .1 Examples of application 1 .1 .1 Constant pressure

3 Edition 0415

AGA

Technical Information middot GB

bull All-purpose servo regulator for gaseous media with integrated safety valve

bull Suitable for a max inlet pressure of 500 mbar (7 psig)bull Minimum installation effort no external impulse line requiredbull Setting options from two sidesbull EU certifiedbull VAD VAG ANSICSA and AGA approvedbull VAD VAG VAV VAH FM approvedbull VAD VAG VAV UL listedbull VAD VAG VAV VAH certified for systems up to SIL 3 and PL e

Pressure regulators with solenoid valve VAD VAG VAV VAHFlow rate regulator VRHPressure regulators with double solenoid valve VCD VCG VCV VCH

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 2 = To be continued

ContentsPressure regulators with solenoid valve VAD VAG VAV VAH 1Flow rate regulator VRH 1Pressure regulators with double solenoid valve VCD VCG VCV VCH 1Contents 21 Application 411 Examples of application 6

111 Constant pressure control 6112 Constant pressure control with two gas solenoid valves 6113 Constant pressure control with max pressure switch 7114 Constant pressure control with non-controlled pilot gas outlet 7115 Modulating control 8116 Modulating control with two gas solenoid valves 8117 Modulating control with two gas solenoid valves and inlet pressure switch 9118 HighLow control 9119 Zero pressure control 101110 Staged flow rate control 111111 Continuous or staged flow rate control 121112 Modulating control with variable airgas ratio control with gas solenoid valve 121113 Modulating control in residential heat generation 13

2 Certification 143 Function 1531 VAD VAG VAH VRH VAV 15311 Pressure regulator for gas VAD 15312 Airgas ratio control VAG 16313 Flow rate regulators VAH VRH 17314 Variable airgas ratio control VAV 18315 Pressure regulator with gas solenoid valve VAxS position indicator with visual indicator 19

32 Animation 2033 Connection diagram 21

331 VAx with M20 cable gland 21332 VAx with plug 21333 VAS with VADVAGVAHVAV with M20 cable gland 21334 VAS with VADVAGVAHVAV with plug 21

4 Replacement possibilities for MODULINE pressure regulators with gas solenoid valve 2241 GVS GVI GVIB GVR and GVRH are to be replaced by VAD VAG VAG+VAS VAH and VAV 22

5 Flow rate 2451 Selection example for VAD 24511 Calculate VAD 24

52 Selection example for VAG VAH VRH VAV 25521 Calculate VAG VxH VAV 25

53 Selection example for zero governor VAGN 26531 Calculate VAGN 26

6 Selection 2761 Selection table for pressure regulator with solenoid valve VAD 2762 Type code for VAD 2863 Selection table for airgas ratio control with solenoid valve VAG flow rate regulators VAH VRH 2964 Type code for VAG VAH VRH 3065 Selection table for variable airgas ratio control with solenoid valve VAV 3166 Type code for VAV 3267 Accessories 33

7 Project planning information 3471 Installation 34

711 Installation position 3572 Setting the low-fire rate on VAG VAH VRH VAV 3673 Setting the high-fire rate on VAV 36

731 Calculation 36

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 3

8 Accessories 3781 Gas pressure switch DGVC for VAx VRH 3782 Gas pressure switch DGVCT for VAxT VRHT 3783 Bypass valvepilot gas valve VAS 1 38831 VAS 1 attached to VADVAGVAHVAV 1 38832 VAS 1 attached to VADVAGVAHVAV 2 VADVAGVAHVAV 3 38833 Flow rate 39

84 Bypass valvepilot gas valve VBY 8 for VADVAGVAHVAV 1 40

841 Scope of delivery VBY 8I as bypass valve 40842 Scope of delivery VBY 8R as pilot gas valve 40843 Selection 40844 Type code 40845 Flow rate 41846 Technical data 41

85 Tightness control TC 116V 4286 Pressure test points 4287 Cable gland set 4288 Seal set VA 1 ndash 3 4389 Differential pressure orifice 43810 Retaining frame 44811 Attachment block 44812 Gas control line 44813 Measuring orifice VMO 45814 Filter module VMF 45815 Fine-adjusting valve VMV 45

9 Technical data 4691 VAD 4792 VAG 4793 VAH VRH 4794 VAV 4895 Safety-specific characteristic values for VAx 1 ndash 3 49

951 Determining the PFHD value the λD value and the MTTFd value 50

952 Calculating the PFHD and PFDavg 5096 Dimensions 51

10 Converting units 5211 Maintenance cycles 5212 Glossary 53121 Diagnostic coverage DC 53122 Mode of operation 53123 Category 53124 Common cause failure CCF 53125 Fraction of undetected common cause failures β 53126 B10d value 53127 T10d value 53128 Hardware fault tolerance HFT 53129 Mean dangerous failure rate λD 531210 Safe failure fraction SFF 541211 Probability of dangerous failure PFHD 541212 Mean time to dangerous failure MTTFd 541213 Demand rate nop 541214 Average probability of dangerous failure on demand PFDavg 54

Feedback 55Contact 55

Contents

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 4

VAD VAG VAH VAV VRH

1 ApplicationRegulators with solenoid valves are designed for shut-off and thanks to the servo technology for precise control of the gas supply to gas burners and gas appliances They are used in gas control and safety systems in all sectors of the iron steel glass and ceramics industries as well as in residential or commercial heat generation such as the packaging paper and foodstuffs industries

VADConstant pressure governor Class A with high control accu-racy for excess air burners atmospheric burners or single-stage forced draught burners Pressure preset via setpoint spring In the case of fluctuating furnace or kiln pressures the furnace chamber pressure may also be connected for maintaining a constant burner capacity

VAGAirgas ratio control Class A for maintaining a constant airgas pressure ratio for modulating-controlled burners or with VAS 1 bypass valve for stage-controlled burners Pressure preset by the air control line

The VAGN can also be used as a zero governor for gas engines

VAH VRHFlow rate regulators VAH and VRH are used to maintain a constant gasair ratio for modulating-controlled and stage-controlled burners The gas flow rate is controlled proportio-nally to the air flow rateIn addition flow rate regulator VAH is designed as a gas solenoid valve and shuts off the gas or air supply safely

VAVVariable airgas ratio control Class A for maintaining a con-stant gasair pressure ratio for modulating-controlled burners Pressure preset by the air control line The ratio of gas pressure to air pressure remains constant It can be set from 061 to 31 Pressure fluctuations in the combustion chamber can be compensated via the combustion chamber control pressure

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 5

Application

Pressure regulator on excess air burners in the ceramics in-dustry

Airgas ratio control on melting furnace for ensuring stoichio-metric combustion over the entire capacity range

Aluminium age-hardening furnace with airgas ratio controls for air deficiency cut-out

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 6

VAD

VADVAS

1 1 Examples of application1 1 1 Constant pressure controlThe pressure regulator with gas solenoid valve VAD maintains the set gas outlet pressure pd constant when subject to differing flow rates If a second gas so-lenoid valve is used upstream of the VAD this complies with the requirements of EN 746-2 for two Class A gas solenoid valves connected in series

1 1 2 Constant pressure control with two gas solenoid valvesThe pressure regulator with gas solenoid valve VAD maintains the set gas outlet pressure pd constant when subject to differing flow rates

Application

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 7

VAD

DGCmin DGCmax

VASPZL PZH

DGCmin DGCmax

VADVAS

VAS

PZL PZH

1 1 3 Constant pressure control with max pressure switchIn this example the minimum inlet pres-sure pu and the maximum outlet pres-sure pd are monitored with the pressure switches DGC The simple attachment of the pressure switch module makes installation easier

1 1 4 Constant pressure control with non-controlled pilot gas outletIn this application the pilot burner is supplied with a high inlet pressure via the pilot gas outlet The simple attach-ment of the bypass valve module makes installation easier The minimum inlet pressure pu and the maximum outlet pressure pd are monitored with the pres-sure switches DGC

Application gt Examples of application

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 8

psa

psa

VAG

MIC + BVA

psa

psaM

IC + BVA

VASVAG

1 1 5 Modulating controlThe gas outlet pressure pd is con trolled via the airgas ratio control with gas so-lenoid valve VAG The gas outlet pres-sure pd follows the changing air control pressure psa The ratio of gas pressure to air pressure remains constant The VAG is suitable for a control range up to 101If a second solenoid valve is used up-stream of the VAG this complies with the requirements of EN 746-2 for two Class A valves connected in series

1 1 6 Modulating control with two gas solenoid valvesThe gas outlet pressure pd is con trolled via the airgas ratio control with gas so-lenoid valve VAG The gas outlet pres-sure pd follows the changing air control pressure psa The ratio of gas pressure to air pressure remains constant The VAG is suitable for a control range up to 101The gas line is two Class A shut-off valves connected in series in accordance with the requirements of EN 746-2

Application gt Examples of application

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 9

DGCmin

PZL

psa

psa

M

IC + BVA

VAS

VAG

psa

DGCmin

PZL

psa

M

IC 40 + BVA

VAS

VAG

VAS 1

1 1 7 Modulating control with two gas solenoid valves and inlet pressure switchIn this case the minimum inlet pressure pu is monitored by the pressure switch DGC The simple attachment of the pressure switch module makes instal-lation easier

1 1 8 HighLow controlAt high fire the gas outlet pressure pd follows the air control pressure psa The ratio of gas pressure to air pressure re-mains constant Low fire is determined via the bypass valve VAS 1 Here as well the simple attachment of the bypass valve module makes installation easier

Application gt Examples of application

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 10

Venturi

DGCmin

PZL

M

IC + BVA

VASVAGN

1 1 9 Zero pressure controlIn this application the control air pres-sure is the atmospheric air pressure The air flow rate generates a negative pressure in the gas pipe via the Venturi This negative pressure is compensated by the airgas ratio control with gas solenoid valve VAGN The greater the negative pressure the greater the gas flow rate

Application gt Examples of application

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 11

BVHM + MB7L

VMV

ECOMAX

VASN

BCU BZA

Prozess SteuerungProcess Control (PCC)

AKT

psa-

psa

pd-

VAH

1 1 10 Staged flow rate controlThis application shows the VAH on a self recuperative burnerThe pressure loss in the recuperator de-pends on the furnace or kiln temperature When the furnace or kiln temperature is increased (at a constant air supply pres-sure) the flow rate drops This change in the air flow rate is measured by the orifice and the VAH changes the gas volume accordinglyThe air index (lambda) can be set using the fine-adjusting valve VMV

Application gt Examples of application

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 12

M

IC + BVA

VMV

VMO

VAH

VAS

psa-psa

pd-

psa

psc

DGCmin

PZL

psa

psc

M

IC + BVA

VAS VAV

1 1 11 Continuous or staged flow rate controlThis application shows flow rate control for a radiant tube burner system with plug-in recuperator for air preheatingThere are temperature-dependent air pressure losses in the recuperator The ratio of gas pressure to air pressure does not remain constant The fluctuating air flow rate is measured at the measuring orifice VMO and the VAH controls the gas flow rate proportionallyThe air index (lambda) can be set using the fine-adjusting valve VMV

Application gt Examples of application

1 1 12 Modulating control with variable airgas ratio control with gas solenoid valveThe ratio of gas pressure to air pressure can be adjusted infinitely between 061 and 31 Pressure fluctuations in the com-bustion chamber can be compensated via the combustion chamber control pressure psc see page 15 (Function)

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 13

DGCmin

PZL

psa

psc

VAS VAV

1 1 13 Modulating control in residential heat generationThis application shows the variable airgas ratio control with solenoid valve VAV fitted to a modulating-controlled forced draught burnerThe combustion air volume is set via a butterfly valve for air or by adjusting the fan speed

Application gt Examples of application

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 14

2 CertificationCertificates ndash see Docuthek

VAD VAG VAV VAH certified to SIL and PL

For systems up to SIL 3 pursuant to EN 61508 and PL e pursu-ant to ISO 13849

VAD VAG VAV VAHEU certified pursuant to

ndash Gas Appliances Directive (2009142EC) in conjunction with EN 13611 EN 161 EN 88-1 EN 126 and EN 1854

Meets the requirements of thendash Low Voltage Directive (200695EC)ndash EMC Directive (2004108EC)

VAD VAG VAV VAH FM approved

Factory Mutual Research Class 7400 Process Control Valves Designed for applications pursuant to NFPA 85 and NFPA 86 www approvalguide com

VAD VAG ANSICSA approved

American National Standards InstituteCanadian Standards Association ndash ANSI Z21 21CSA 6 5 ANSI Z21 18 and CSA 6 3

wwwcsagrouporg ndash Class number 3371-83 (natural gas LPG) 3371-03 (natural gas propane)

VAD VAG VAV UL listed

Underwriters Laboratories ndash UL 429 ldquoElectrically operated valvesrdquo wwwulcom Tools (at the bottom of the page) Online Certifications Directory

VAD VAG VAV AGA approved

AGA

Australian Gas Association Approval No 5319 httpwww aga asn auproduct_directory

Eurasian Customs Union

The product VAD VAG VAV VAH VCD VCG VCV VCH meets the technical specifications of the Eurasian Customs Union (the Russian Federation Belarus Kazakhstan)

Approval does not apply for 100 V AC and 200 V AC

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 15

3 Function3 1 VAD VAG VAH VRH VAVThe regulator is closed when it is disconnected from the power supplyOpening connect the system to the electrical power supply (alternating voltage will be rectified) The blue LED lights up The coilrsquos magnetic field pulls the armature upwards and clears the supply nozzle for the gas inlet pressure pu The gas passes through the internal impulse tube to the adjustment diaphragm and then pushes the valve disc open The outlet pressure is applied to the servo diaphragm via the internal feedback

The servo regulator then maintains a set constant outlet pres-sure pd

3 1 1 Pressure regulator for gas VADThe nominal outlet pressure pd is defined by the control spring

Servoregulator

Valve

Armature

Valve disc

Adjustmentdiaphragm

Servodiaphragm

Internalfeedback

Controlspring

Solenoid coil

Supplynozzle

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 16

3 1 2 Airgas ratio control VAGThe airgas ratio control VAG controls the outlet pressure pd depending on the variable air control pressure psaThe ratio of gas pressure to air pressure remains constant 11 The VAG is suitable for a control range up to 101If the burner operates at low-fire rate the gasair mixture can be changed by adjusting the zero point spring ldquoNrdquo

Function

psa

pd

Zero point setting N zero point spring

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 17

Function

3 1 3 Flow rate regulators VAH VRHThe flow rate regulators VAH VRH control the gas flow rate depending on the variable air flow rate The ratio of gas flow rate to air flow rate remains constant If the burner operates at low-fire rate the gasair mixture can be changed by adjusting the zero point spring ldquoNrdquoIn addition flow rate regulator VAH is designed as a gas solenoid valve and shuts off the gas or air supply safely

psa

psa-

pd-

pdInternal feedback

Zero point setting N zero point spring

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 18

3 1 4 Variable airgas ratio control VAVThe servo regulator maintains a set constant outlet pressure pd The variable airgas ratio control VAV controls the outlet pressure pd depending on the variable air control pressure psa The ratio of gas pressure to air pressure remains constantThe settings N and V can be changed and read off from both sides of the unit using the adjusting screwsThe ratio of gas pressure to air pressure at low-fire rate can be changed by adjusting the zero point setting N By turning the adjusting screw ldquoNrdquo the force of the zero point spring and thus the zero point is changed by plusmn 15 mbar (06 WC) see page 34 (Project planning information)The high-fire rate is set by turning the adjusting screw ldquoVrdquo until the required flue gas values are achieved see page 34 (Project planning information) The ratio of gas pressure to air pressure can be set from 061 to 31The settings N and V influence each other and the adjustment process must be repeated if necessaryThe outlet pressure pd is applied to the servo diaphragm via the internal feedback The combustion chamber control pres-sure psc is transmitted to the space under the air and servo diaphragms via an impulse lineThe pressure differential psa - psc is achieved on the air diaphragm and the pressure differential pd - psc on the servo diaphragm This ensures that pressure fluctuations in the combustion cham-ber can be compensated The flue gas values remain constant in the case of fluctuations in the combustion chamber pressure (pd - psc) = (psa - psc) times V + N

Function

pdpsc

psa

Air diaphragm

Transmission ratio V

Zero point setting N zero point spring

Internalfeedback

Adjustment diaphragm

Servo diaphragm

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 19

1 COM

2 NO

3 NC

3 1 5 Pressure regulator with gas solenoid valve VAx S position indicator with visual indicatorOpening when the pressure regulator is opened the posi-tion indicator switches The visual indicator is activated The ldquoopenrdquo signal is marked in red The double valve seat opens to release the volume of gasClosing the pressure regulator VAx is disconnected from the voltage supply and the closing spring presses the double valve disc on to the valve seat The position indicator is actuated The visual indicator is white for ldquoclosedrdquoThe actuator cannot be rotated on a pressure regulator with a position indicator and a visual indicatorNOTE NFPA 86 ndash the following must be taken into account as soon as the capacity of the pilot or main burner exceeds 117 kW (400000 BTUh) safety shut-off valve VASS must be fitted with a proof of closure overtravel switch with a visual position indicator and the burner-side pressure regulator with gas solenoid valve VAxS must also be fitted with a position indicator with visual indicator The closed position can be verified using the proof of closure switch of the gas solenoid valve VASS

Function

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 20

3 2 AnimationThe interactive animation shows the function of the valVario controls VADVAGVAHVAVClick on the picture The animation can be controlled using the control bar at the bottom of the window (as on a DVD player) To play the animation you will need Adobe Reader 7 or a newer version If you do not have Adobe Reader on your system you can download it from the Internet

Go to wwwadobecom click on ldquoAdobe Readerrdquo at the bottom of the page and follow the instructionsIf the animation does not start to play you can download it from the document library (wwwdocuthekcom) as an inde-pendent application

Function

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 21

3 3 Connection diagramWiring to EN 60204-1Connection diagram for VAxS with position indicator ndash see page 19 (Pressure regulator with gas solenoid valve VAxS position indicator with visual indicator)

3 3 1 VAx with M20 cable gland

L1 (+)

N (ndash)

3 3 2 VAx with plug

1 = N (-)

2 = L1 (+)

3 3 3 VAS with VADVAGVAHVAV with M20 cable glandL1V1 (+)

N (-)

L1V2 (+)

3 3 4 VAS with VADVAGVAHVAV with plug2 = L1V1 (+)

1 = N (-)

3 = L1V2 (+)

Function

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 22

4 Replacement possibilities for MODULINE pressure regulators with gas solenoid valve4 1 GVS GVI GVIB GVR and GVRH are to be replaced by VAD VAG VAG+VAS VAH and VAV

Type TypeGVS Pressure regulator with gas solenoid valve Pressure regulator with gas solenoid valve VADGVI Airgas ratio control with gas solenoid valve Airgas ratio control with gas solenoid valve VAG

GVIB Airgas ratio control with gas solenoid valve and bypass valve

Airgas ratio control with gas solenoid valve and bypass valve VAG+VAS

GVRH Flow rate regulator with gas solenoid valve Flow rate regulator with gas solenoid valve VAHGVR Variable airgas ratio control with gas solenoid valve Variable airgas ratio control with solenoid valve VAV115125 Flange 38 Size 115

Size 125 on request

115125 Flange frac12 Size 115

Size 125 Size 1 DN 15 115

115125 Flange frac34 Size 115

Size 125 Size 1 DN 20 120

115125 Flange 1 Size 115

Size 125 Size 1 DN 25 125

232240 Flange 1 Size 232

Size 240 on request

232240 Flange 1frac12 Size 232

Size 240 Size 2 DN 40 240

350 Flange 1frac12 Size 350 on request350 Flange 2 Size 350 Size 3 DN 50 350ML MODULINE + Rp internal thread connection fl anges Rp internal thread RTML MODULINE + NPT internal thread connection fl anges NPT internal thread N01 pu max 100 mbar (15 psig) pu max 500 mbar (7 psig) 02 200 mbar (3 psig) 500 mbar (7 psig)

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 23

Replacement possibilities for MODULINE pressure regulators with gas solenoid valve gt GVS GVI GVIB GVR and GVRH are to be replaced by VAD VAG VAG+VAS VAH and VAV

ContinuationType Type

Quick opening Quick opening NF1 Control ratio 11 Control ratio 11 K Mains voltage 24 V DC Mains voltage 24 V DC K

ndash 100 V AC PQ 120 V AC 120 V AC Q

ndash 200 V AC YT 220240 V AC 230 V AC W3 Electrical connection via terminals Electrical connection via terminals 6 Electrical connection via socket Electrical connection via socket 9 Metal terminal connection box Electrical connection via terminals S Position indicator Position indicator with visual indicator SG Position indicator for 24 V Position indicator for 24 V with visual indicator GM Suitable for biologically produced methane Suitable for biologically produced methane

Pressure test point at the inlet Pressure test point at the inlet and outlet Outlet pressure pd -25

Outlet pressure pd 25 ndash 25 mbar (1 ndash 10 WC)

2 ndash 90 mbar (08 ndash 36 WC) 20 ndash 50 mbar (8 ndash 20 WC) -5035 ndash 100 mbar (14 ndash 40 WC) -100Standard seat A

ExampleGVS 350ML01T3with Rp 2 connection flanges

ExampleVAD 350RNW-100A

with test points

= standard = available Pressure test points may be attached at the left- andor right-hand side Position indicator with visual indicator can be attached at the left- or right-hand side

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 24

∆p [i

nch

WC]

Qn [SCFH]100 400 600 4000 60001000 200020 30 40 50 200 3006015 80

1

08

1

2

3

4

56

8

10

20

30

40

5060

80

100

200

∆p [m

bar]

5

8

3

20

10

30

40

80

60

300

400

50

04 06 1 2 3 4 5 808 10 20 30 402

03 60 100 200

100

200

500

1

3

2

04 06 08 1 2 3 4 5 6 8 10 20 30 40

04 06 08 1 2 3 4 5 6 8 10

200

80 10020 3003

03Qn [m3h]

02

50 60 80 100

40 50 60

VAD

115

B

VAD

120

AVA

D 12

5A

P1P2

VAD

240

AVA

D 35

0A

= natural gas (ρ = 080 kgm3) = propane (ρ = 201 kgm3) = air (ρ = 129 kgm3)

The characteristic flow rate curves have been meas-ured with the specified flanges and a fitted strainer If two or more valves are combined the pressure loss of each additional valve drops by approx 5

metric imperial

Enter densityFlow rate Qn

Inlet pressure pu

Outlet pressure pd

Product RV v

Pressure loss ∆p

∆pmin

5 Flow rate5 1 Selection example for VADNatural gas Flow rate Qmax = 30 m3h Inlet pressure pu = 80 mbar Outlet pressure pd = 60 mbarThe desired control ratio from high-fire to low-fire rate is RV = 101High fire ∆p = pu - pd = 20 mbar Point P1Low fire Point P2 Qmin = 26 m3h at ∆p = 20 mbar RV = Qmax Qmin = 1151

Point P1 and point P2 must be within the working range of a unit size We recommend that you select the smallest size to achieve the best control properties

5 1 1 Calculate VAD

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 25

∆p [i

nch

WC]

Qn [SCFH]100 400 600 4000 60001000 200020 30 40 50 200 3006015 80

1

08

1

2

3

4

56

8

10

20

30

40

5060

80

100

200

∆p [m

bar]

5

8

3

20

10

30

40

80

60

300

400

50

04 06 1 2 3 4 5 808 10 20 30 402

03 60 100 200

100

200

500

1

3

2

04 06 08 1 2 3 4 5 6 8 10 20 30 40

04 06 08 1 2 3 4 5 6 8 10

200

80 10020 3003

03Qn [m3h]

02

50 60 80 100

40 50 60

= pd min lt 5 mbar

VAG

VxH

VAV

115

BVA

GV

xHV

AV 12

0A

VAG

VxH

VAV

125

A

P1

P2

VAG

VxH

VAV

240

AVA

GV

xHV

AV 3

50A

= natural gas (ρ = 080 kgm3) = propane (ρ = 201 kgm3) = air (ρ = 129 kgm3)

The characteristic flow rate curves have been meas-ured with the specified flanges and a fitted strainer If two or more valves are combined the pressure loss of each additional valve drops by approx 5

5 2 Selection example for VAG VAH VRH VAV Natural gas Flow rate Qmax = 30 m3h Inlet pressure pu = 80 mbar Outlet pressure pd max VAG = 60 mbarThe desired control ratio from high-fire to low-fire rate is RV = 101High fire ∆p = pu - pd max = 20 mbar Point P1Low fire pd min = pd max RV2 = 06 mbar Qmin = Qmax RV = 3 m3h ∆p = pu - pd min = 794 mbar Point P2 select VAG 120APoint P1 and point P2 must be within the working range of a unit size We recommend that you select the smallest size to achieve the best control properties

metric imperial

Enter densityFlow rate Qn

Inlet pressure pu

Outlet pressure pd

Product RV v

5 2 1 Calculate VAG VxH VAV

Pressure loss ∆p

∆pmin

Flow rate

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 26

∆p [i

nch

WC]

Qn [SCFH]100 400 600 4000 60001000 200020 30 40 50 200 3006015 80

1

08

1

2

3

4

56

8

10

20

30

40

5060

80

100

200

∆p [m

bar]

5

8

3

20

10

30

40

80

60

300

400

50

04 06 2 3 4 5 808 10 20 30 402

03 60 100 200

100

200

500

1

3

2

04 06 08 1 2 3 4 5 6 8 10 20 30 40

04 06 08 1 2 3 4 5 6 8 10

200

80 10020 3003

03Qn [m3h]

02

50 60 80 100

40 50 60

VAG

115

N

P1VAG

125

N

VAG

120

N

VAG

240

NP2

VAG

350

N

= natural gas (ρ = 080 kgm3) = propane (ρ = 201 kgm3) = air (ρ = 129 kgm3)

The characteristic flow rate curves have been meas-ured with the specified flanges and a fitted strainer If two or more valves are combined the pressure loss of each additional valve drops by approx 5

5 3 Selection example for zero governor VAG NNatural gas Flow rate Qmax = 30 m3h Inlet pressure pu = 20 mbar Outlet pressure pd = 0 mbar (atmospheric pressure)The desired control ratio from high-fire to low-fire rate is RV = 101High fire ∆p = pu - pd max = 20 mbar Point P1Low fire Point P2 Qmin = 24 m3h at ∆p = 20 mbar RV = Qmax Qmin = 1231Point P1 and point P2 must be within the working range of a unit size We recommend that you select the smallest size to achieve the best control properties

metric imperial

Enter densityFlow rate Qn

Inlet pressure pu

Outlet pressure pd

Product RV

5 3 1 Calculate VAG N

Pressure loss ∆p

∆pmin

Flow rate

v

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 27

6 Selection6 1 Selection table for pressure regulator with solenoid valve VAD

Accessories right Accessories left

Type1) T R N F N K P Q Y W S2) G2) R2) L2) M20

cab

le g

land

Plug

with

soc

ket

Plug

with

out s

ocke

t

-25-50 -100 A B Scre

w p

lug

Pres

sure

test

poi

nt

DG

17V

C 3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

Scre

w p

lug

Pres

sure

test

poi

nt

DG

17V

C 3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

VAD 115

VAD 120

VAD 125

VAD 240

VAD 350

= standard = available1) The following nominal inlet fl ange diameters are also available size 1 with nominal diameter DN 10 size 2 with nominal diameters DN 25 DN 32 and DN 50 size 3 with nominal diameters DN 40 and DN 652) Position indicator and bypasspilot gas valve cannot be fi tted together on the same side3) Specify the test point for inlet pressure pu or outlet pressure pdHelp for selecting the pressure regulator VAD can be found on the ProFi DVD wwwkromschroedercom Products DVD Product fi nder ldquoProFirdquo

Order exampleVAD 240RNW-100A

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 28

Selection

6 2 Type code for VADCode DescriptionVAD Pressure regulator with solenoid valve1 ndash 3 SizeT T-product10 ndash 65 Nominal inlet and outlet diameterRNF

Rp internal threadNPT internal thread

ISO fl angeN Quick opening quick closingKPQYW

Mains voltage 24 V DCMains voltage 100 V AC 5060 HzMains voltage 120 V AC 5060 HzMains voltage 200 V AC 5060 HzMains voltage 230 V AC 5060 Hz

SG

Position indicator with visual indicatorPosition indicator for 24 V with visual indicator

RL

Viewed from the right (in the direction of fl ow)Viewed from the left (in the direction of fl ow)

-25-50-100

Outlet pressure pd 25 ndash 25 mbar20 ndash 50 mbar

35 ndash 100 mbarAB

Standard valve seatReduced valve seat

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 29

Selection

6 3 Selection table for airgas ratio control with solenoid valve VAG flow rate regulators VAH VRH

Type1) T R N F N K P Q Y W S2) G2) R2) L2) M20

cab

le g

land

Plug

with

soc

ket

Plug

with

out s

ocke

t

A B E K A N Scre

w p

lug

Pres

sure

test

poi

ntD

G 1

7VC

3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

Scre

w p

lug

Pres

sure

test

poi

ntD

G 1

7VC

3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

VAG 115 VAG 120 VAG 125 VAG 240 VAG 350

VAH 115 VAH 120 VAH 125 VAH 240 VAH 350

VRH 115 VRH 120 VRH 125 VRH 240 VRH 350

= standard = available1) The following nominal inlet fl ange diameters are also available size 1 with nominal diameter DN 10 size 2 with nominal di-

ameters DN 25 DN 32 and DN 50 size 3 with nominal diameters DN 40 and DN 652) Position indicator and bypasspilot gas valve cannot be fi tted together on the same side3) Specify the test point for inlet pressure pu or outlet pressure pdHelp for selecting the regulators can be found on the ProFi DVD wwwkromschroedercom Products DVD Product fi nder ldquoProFirdquo

Order exampleVAG 240RNWAE

Accessories right Accessories left

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 30

Selection

6 4 Type code for VAG VAH VRHCode DescriptionVAGVAHVRH

Airgas ratio control with solenoid valveFlow rate regulator with solenoid valve

Flow rate regulator1 ndash 3 SizeT T-product15 ndash 50 Nominal inlet and outlet diameterRNF

Rp internal threadNPT internal thread

ISO fl angeN1) Quick opening quick closingK1)

P1)

Q1)

Y1)

W1)

Mains voltage 24 V DCMains voltage 100 V AC 5060 HzMains voltage 120 V AC 5060 HzMains voltage 200 V AC 5060 HzMains voltage 230 V AC 5060 Hz

S1)

G1)Position indicator with visual indicator

Position indicator for 24 V with visual indicatorRL

Viewed from the right (in the direction of fl ow)Viewed from the left (in the direction of fl ow)

AB

Standard valve seatReduced valve seat

EKAN

Connection kit for air control pressure psaVAG VAH VRH compression fi tting

VAG plastic hose couplingVAG VAH VRH NPT 18 adapter

VAG zero governor1) Only available for VAG VAV VAH

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 31

6 5 Selection table for variable airgas ratio control with solenoid valve VAVAccessories right Accessories left

Type1) T R N F N K P Q Y W S2) G2) R2) L2) M20

cab

le g

land

Plug

with

soc

ket

Plug

with

out s

ocke

t

A B E K A Scre

w p

lug

Pres

sure

test

poi

ntD

G 1

7VC

3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

Scre

w p

lug

Pres

sure

test

poi

ntD

G 1

7VC

3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

VAV 115

VAV 120

VAV 125

VAV 240

VAV 350

= standard = available1) The following nominal inlet fl ange diameters are also available size 1 with nominal diameter DN 10 size 2 with nominal diameters DN 25 DN 32 and DN 50 size 3 with nominal diameters DN 40 and DN 652) Position indicator and bypasspilot gas valve cannot be fi tted together on the same side3) Specify the test point for inlet pressure pu or outlet pressure pdHelp for selecting the variable airgas ratio control VAV can be found on the ProFi DVD wwwkromschroedercom

Products DVD Product fi nder ldquoProFirdquo

Order exampleVAV 240RNWAK

Selection

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 32

Selection

6 6 Type code for VAVCode DescriptionVAV Variable airgas ratio control with solenoid valve1 ndash 3 SizeT T-product15 ndash 50 Nominal inlet and outlet diameterRNF

Rp internal threadNPT internal thread

ISO fl angeN Quick opening quick closingKPQYW

Mains voltage 24 V DCMains voltage 100 V AC 5060 HzMains voltage 120 V AC 5060 HzMains voltage 200 V AC 5060 HzMains voltage 230 V AC 5060 Hz

SG

Position indicator with visual indicatorPosition indicator for 24 V with visual indicator

RL

Viewed from the right (in the direction of fl ow)Viewed from the left (in the direction of fl ow)

AB

Standard valve seatReduced valve seat

EKA

Connection kit for air control pressure psa and combus-tion chamber control pressure psc

compression fi ttingplastic hose coupling

NPT 18 adapter

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 33

Selection

6 7 AccessoriesModularly configurable withndash Screw plugsndash Pressure test pointsndash Pressure switch DGVC for inlet

andor outlet pressurendash Tightness control TCndash Bypasspilot gas valve VBY 8 for

size 1ndash Bypasspilot gas valve VAS 1For further information see page 37 (Accessories)

Position indicator

Plug with socket

Plug

Screwplugs

Pressuretest points

Pressure switch DGC Tightness

control TC

Bypasspilot gas valve VBY 8 for size 1

Bypasspilot gas valve VAS 1

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 34

7 Project planning informationDo not store or install the unit in the open airThe inlet pressure pu and the outlet pressure pd can be meas-ured on both sides of the valve body To increase the control accuracy an external impulse line can be connected instead of the pressure test point pd

VAD

pu

pd

(psa)

VAGpd

pu

psa

psa

VAD measurement point for the gas outlet pressure pd on the regulator body A combustion chamber control line (psc) can be connected to connection psa for maintaining a constant burner capacityVAG additional measurement point for the air control pressure psa on the regulator body

VAV

psapsc

pu

pd

VAH VRH

pu

pd-

pdpsa-

psa

VAV measurement point for the outlet pressure pd on the regulator bodyVAH additional measurement points for the outlet pressure pd- and the air control pressure psapsa- on the regulator body

7 1 Installation

GFK

VAGVAH

GFKVAD

Sealing material and thread cuttings must not be allowed to get into the valve housing Install a filter upstream of every system

gt20 mmgt0 79

The unit must not be in contact with masonry Minimum clear-ance 20 mm (079 inches)Ensure that there is sufficient space for installation and ad-justment

le +100 degCle +212 degF

The solenoid body heats up during operation ndash depending on ambient temperature (max 60degC140degF) and intrinsic heating (approx 40degC104degF)

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 35

In the case of double solenoid valves the position of the con-nection box can only be changed by removing the actuator and reinstalling it offset by 90deg or 180deg

If more than three valVario controls are installed in line the controls must be supported

The seals in some gas compression fittings are approved for temperatures of up to 70degC (158degF) This temperature limit will not be exceeded if the flow through the pipe is at least 1 msup3h (3531 SCFH) of gas and the maximum ambient temperature is 50degC (122degF)

7 1 1 Installation position

pu ge 80 mbar(80 hPa32 WC)

VAD VAG VAH VRH VAV

In humid environments black solenoid actuator in the vertical upright position only

VAD VAG VAH VRH black solenoid actuator in the vertical upright position or tilted up to the horizontal not upside downVAG VAH horizontal position only if pu ge 80 mbar (32 WC))VAV installation in the vertical position only black solenoid actuator in the vertical upright positionTo ensure that the airgas ratio control VAG the flow rate regulator VAH VRH or the variable airgas ratio control VAV can react quickly when the load is changed the impulse line for the air control pressure psa and for VAV the impulse line for the combustion chamber control pressure psc should be kept as short as possible The tube internal diameter for the impulse line must always be ge 39 mm (015)

VAH VRHIt is not permitted to install a gas solenoid valve VAS down-stream of flow rate regulator VAH VRH and upstream of fine-adjusting valve VMV The VAS would no longer be able to perform its function as a second safety valve if installed in the above-mentioned position

M

VMV

VAH

VASVAS

pd-

psa-psa

VMV

VAH pd-

psa-psa

The measuring orifice in the air line for impulse lines psa and psa- must always be installed downstream of the air control valve

Project planning information gt Installation

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 36

VAVThe impulse line for the combustion chamber control pres-sure psc must be fitted so that no condensation can enter the pressure regulator but rather flows back into the combustion chamber

7 2 Setting the low-fire rate on VAG VAH VRH VAV

-10 +05-05

ndash

+1

-15

mbar

+15

06

1 152

3

N V

+ +ndash

+30 -15+15

ndash

-3

+5

mbar

-5

N

+

VAG VAH VRH VAV

If the burner operates at low-fire rate the gasair mixture can be changed using the parallel shift of the characteristic curve by turning the adjusting screw ldquoNrdquoAdjusting range at low fire VAG VAH VRH -5 to +5 mbar (-195 to +195 WC) VAV -15 to +15 mbar (-06 to +06 WC)

7 3 Setting the high-fire rate on VAVTo set the high-fire rate the transmission ratio is changed us-ing the adjusting screw ldquoVrdquo until the required flue gas values are achievedTransmission ratio V = pdpsa = 061 to 31The settings N and V can influence each other and must be repeated if necessary

+N+V

-V

-N

VAV

psa [mbar]

p d [m

bar]

7 3 1 CalculationWith no connection to the combustion chamber control pres-sure psc pd = V times psa + NWith connection to the combustion chamber control pressure psc (pd - psc) = V times (psa - psc) + N

Project planning information

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 37

pu pd

21579

4836

085310

189

142

8 Accessories8 1 Gas pressure switch DG VC for VAx VRHType Adjusting range [mbar]DG 17VC 2 to 17DG 40VC 5 to 40DG 110VC 30 to 110DG 300VC 100 to 300

Scope of delivery 1 times pressure switch for gas 2 times retaining screws 2 times sealing rings

8 2 Gas pressure switch DG VCT for VAx T VRH TType Adjusting range [WC]DG 17VCT 08 to 68DG 40VCT 2 to 16DG 110VCT 12 to 44DG 300VCT 40 to 120

Scope of delivery 1 times gas pressure switch with AWG 18 connection wires 2 times retaining screws 2 times sealing ringsMonitoring the inlet pressure pu the electrical plug of the pressure switch for gas points towards the inlet flangeMonitoring the outlet pressure pd the electrical plug of the pressure switch for gas points towards the outlet flange

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 38

A BC

D

FE

ACD

F

B

E

8 3 Bypass valvepilot gas valve VAS 18 3 1 VAS 1 attached to VADVAGVAHVAV 1Scope of delivery A 1 times bypasspilot gas valve VAS 1 B 4 times O-rings C 4 times double nuts D 4 times connection parts E 1 times mounting aidBypass valve VAS 1 F 2 times connection pipes if the bypass valve has a blind flange

at the outlet sidePilot gas valve VAS 1 F 1 times connection pipe 1 times sealing plug if the pilot gas valve

has a threaded flange at the outlet side

Accessories

8 3 2 VAS 1 attached to VADVAGVAHVAV 2 VADVAGVAHVAV 3Scope of delivery A 1 times bypasspilot gas valve VAS 1 B 4 times O-rings C 4 times spacer sleeves D 4 times connection parts E 1 times mounting aidBypass valve VAS 1 F 2 times connection pipes if the bypass valve has a blind flange

at the outlet sidePilot gas valve VAS 1 F 1 times connection pipe 1 times sealing plug if the pilot gas valve

has a threaded flange at the outlet side

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 39

2

3

456

810

20

30

405060

80100

∆p [m

bar]

005 01 02 03 05 08 1 2 3 4 51

3

2

Qn [m3h]

1

01

02

03

0405

08

003

002

6 8 10

005 01 02 03 05 08 1 2 3 4 5003 6 8 10

20

005 01 02 03 05 08 1 2 3 4 5003 6 8 10 20

30

∆p [i

nch

WC]

1

2

3

456

810

20

30

40

04

004

006

00801

02

03

0506

08

Qn [SCFH]10 40 60 100 200 3001 500 10002 3 4 5

120 306 8

21 3 4 5 6 7 8 910

8 3 3 Flow rate

The characteristic flow rate curves have been measured for bypass valve VAS 1 with connection pipe diameter 1 to 10 mm (004 to 04) and for the pilot gas valve with 10 mm (04) connection pipe

Bypass valve connection pipe diameter [mm]

Pilo

t gas

val

ve 1

0 m

m (0

4)

conn

ectio

n pi

pe d

iam

eter

Accessories gt Bypass valvepilot gas valve VAS 1

= natural gas (ρ = 080 kgm3) = propane (ρ = 201 kgm3) = air (ρ = 129 kgm3)

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 40

Accessories

8 4 Bypass valvepilot gas valve VBY 8 for VADVAGVAHVAV 1

B

C

AVBY 8

VAx 1

55

(217)40(157)

70 (276)

80(315)

Rp frac14(pilot gas valve)

For mounting on VAD VAG VAH VAV 1 and double solenoid valve VCD VCG VCH VCV 1

8 4 1 Scope of delivery VBY 8I as bypass valveA 1 times bypass valve VBY 8IB 2 times retaining screws with 4 times O-rings both retaining screws

have a bypass orificeC 1 times grease for o-rings

8 4 2 Scope of delivery VBY 8R as pilot gas valveA 1 times pilot gas valve VBY 8RB 2 times retaining screws with 5 x O-rings one retaining screw

has a bypass orifice (2 x O-rings) the other does not (3 x O-rings)

C 1 times grease for O-rings

8 4 3 SelectionType I R W Q K 6L -R -L E B D 05

VBY 8

Order exampleVBY 8RW6L-LED

8 4 4 Type codeCode DescriptionVBY Gas solenoid valve8 Nominal sizeIR

For internal gas pick-up as bypass valveFor external gas pick-up as pilot gas valve

KQW

Mains voltage 24 V DC Mains voltage 120 V AC 5060 HzMains voltage 230 V AC 5060 Hz

6L Electrical connection via plug and socket with LED-R-L

Attachment side of main valve right-hand sideAttachment side of main valve left-hand side

EB

Attached to the VAxEnclosed (separate packing unit)

05D

Nozzle diameter = 05 mm (002)Flow adjustment

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 41

2

01

02

03

05

081

3

456

810

20

30

405060

80100

∆p [m

bar]

1

3

201 02 03 05 1 2 3001 003 4

Qn [m3h]

02 03 05 1 2

01 02 05

002 006

002

002 006 1

0010006 005 01

001

0003

0006 2 3

VBY 8DVBY 805

∆p [i

nch

WC]

1

2

3

456

810

20

30

40

040506

08

1

Qn [SCFH]10 40 60 1005 2081 2 30402

01

02

03

004005006

008

Adjusting range

8 4 5 Flow rateVBY 8 D

+

-

The flow rate can be set by turning the flow rate restrictor (4 mm016 Allen screw) frac14 of a turn Flow rate 10 to 100

VBY 8 05The flow is routed through a 05 mm (002) nozzle and thus has a fixed characteristic flow rate curve Adjustment is not possible

8 4 6 Technical dataInlet pressure pu max 500 mbar (7 psig)Ambient temperature 0 to +60degC (32 to 140degF) no condensation permittedStorage temperature 0 to +40degC (32 to 104degF) no condensation permittedPower consumption 24 V = 8 W 120 V = 8 W 230 V = 95 WEnclosure IP 54

Accessories gt Bypass valvepilot gas valve VBY 8 for VADVAGVAHVAV 1

= natural gas (ρ = 080 kgm3) = propane (ρ = 201 kgm3) = air (ρ = 129 kgm3)

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 42

TC 116VB C

56(22)

49(193)

27(106)

A

A

VCx 1 VCx 2VCx 3

8 5 Tightness control TC 116Vfor VAx 1 ndash 3An adapter plate is required to attach the tightness control to the right- or left-hand side of the pressure regulator with gas solenoid valveScope of delivery A 1 times adapter plate B 2 times O-rings C 2 times retaining screwsFor attachment to left-hand side Order No 74922391 right-hand side Order No 74921995

8 6 Pressure test pointsTest points to check the inlet pressure pu and outlet pressure pdScope of delivery 1 x pressure test points with 1 x profiled sealing rings Order No 74923390

8 7 Cable gland setWhen wiring a double solenoid valve with pressure regula-tor VCx the connection boxes are to be connected using a cable gland setThe cable gland set can only be used if the connection boxes are at the same height and on the same side and if both valves are equipped either with or without a proof of closure switchVA 1 Order No 74921985 VA 2 Order No 74921986 VA 3 Order No 74921987

Accessories

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 43

A B

D

C

Accessories

8 9 Differential pressure orifice

Size PipeDN

Differential pressure orifi cewith outlet dia

1 15 17 mm 0671 20 25 mm 0981 25 30 mm 1182 40 46 mm 1813 50 58 mm 228

If pressure regulator VADVAGVAV 1 is retrofitted upstream of gas solenoid valve VAS 1 a DN 25 differential pressure orifice with outlet opening d = 30 mm (118) must be inserted at the outlet of the pressure regulatorIn the case of pressure regulator VAx 115 or VAx 120 the DN 25 differential pressure orifice must be ordered separately and retrofitted Order No 74922240

8 8 Seal set VA 1 ndash 3VA 1 Order No 74921988 VA 2 Order No 74921989 VA 3 Order No 74921990Scope of deliveryA 1 times double block seal B 2 times O-rings (flange) C 2 times O-rings (pressure switch) for pressure test pointscrew plug D 2 times sealing rings (flat sealing) and 2 times profiled sealing rings

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 44

BA

C

pd-

8 11 Attachment blockFor locked installation of pressure gauge and other acces-soriesScope of delivery A 1 times attachment block B 2 times self-tapping screws for installation C 2 times O-rings

Accessories

8 10 Retaining frameIn the event that a pressure regulator VAx is installed at a later point upstream of a gas solenoid valve VAS a measur-ing orifice VMO or a fine-adjusting valve VMV the retaining frame must be fitted at the inlet of the second device in order to fasten the differential pressure orifice at the regulator outlet Order the retaining frame separatelyRetaining frame for Size 1 Order No 74923029 Size 2 Order No 74923030 Size 3 Order No 74923031

8 12 Gas control lineFine-adjusting valve VMV can be installed on the flow rate regulator VAH for fine adjustment of the gas flow rateThe gas control line for gas outlet pressure pd- is available with 2 18 compression fittingsSize 1 Order No 74924458 Size 2 Order No 74924459

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 45

8 13 Measuring orifice VMOThe measuring orifice VMO is designed to reduce the gas and air flow rates and is installed downstream of the valVario control The measuring orifice is available with Rp internal thread (NPT internal thread) or flange to ISO 7005See wwwdocuthekcom Elster Kromschroumlder Krom-schroumlder LBE Products 03 Valves and butterfly valves valVario accessories Type of document Technical Informa-tion VMO

Accessories

8 14 Filter module VMFUsing the filter module VMF the gas flow upstream of the gas solenoid valve VAS and the airgas ratio control is cleaned The filter module is available with Rp internal thread (NPT internal thread) or flange to ISO 7005 and can also be supplied with fitted pressure switch as an optionSee wwwdocuthekcom Elster Kromschroumlder Krom-schroumlder LBE Products 03 Valves and butterfly valves valVario accessories Type of document Technical Informa-tion VMF

8 15 Fine-adjusting valve VMVThe flow rate is set using the fine-adjusting valve VMV The fine-adjusting valve is available with Rp internal thread (NPT internal thread) or flange to ISO 7005See wwwdocuthekcom Elster Kromschroumlder Krom-schroumlder LBE Products 03 Valves and butterfly valves valVario accessories Type of document Technical Infor-mation VMV

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 46

9 Technical dataGas types natural gas LPG (gaseous) biologically produced methane (max 01 -by-vol H2S) or clean air other gases on request The gas must be clean and dry in all temperature conditions and must not contain condensateCE and FM approved UL listed max inlet pressure pu 10 ndash 500 mbar (4 ndash 200 WC) FM approved (230 V AC 120 V AC 24 V DC) non opera-tional pressure 700 mbar (10 psig)ANSICSA approved (230 V AC 120 V AC 24 V DC) up to 350 mbar (5 psig)Opening time of the solenoid valve quick opening le 05 s Closing time quick closing lt 1 sMedium and ambient temperatures -20 to +60degC (-4 to +140degF) no condensation permittedStorage temperature -20 to +40degC (-4 to +104degF)Enclosure IP 65Valve housing aluminium valve seal NBRConnection flanges with internal thread Rp to ISO 7-1 NPT to ANSIASMESafety valve Class A to EN 161 Factory Mutual Research Class 7400 Process Control Valves (230 V AC 120 V AC 24 V DC) ANSI Z2121 and CSA 65 ANSI Z2118 and CSA 63Control class A to EN 88-1Control range up to 101

Mains voltage 230 V AC +10-15 5060 Hz 200 V AC +10-15 5060 Hz 120 V AC +10-15 5060 Hz 100 V AC +10-15 5060 Hz 24 V DC plusmn20Duty cycle 100Power factor of the solenoid coil cos φ = 09Power consumption

Type Voltage Power

VAx 1

24 V DC 25 W ndash100 V AC 25 W (26 VA)120 V AC 25 W (26 VA)200 V AC 25 W (26 VA)230 V AC 25 W (26 VA)

VAx 2 VAx 3

24 V DC 36 W ndash100 V AC 36 W (40 VA)120 V AC 40 W (44 VA)200 V AC 40 W (44 VA)230 V AC 40 W (44 VA)

VBY24 V DC 8 W ndash

120 V AC 8 W ndash230 V AC 95 W ndash

Cable gland M20 times 15Electrical connection cable with max 25 mm2 (AWG 12) or plug with socket to EN 175301-803

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 47

Position indicator contact rating

Type Voltage Min current(resistive load)

Max current(resistive load)

VAxS VCxS 12 ndash 250 V AC 5060 Hz 100 mA 3 AVAxG VCxG 12 ndash 30 V DC 2 mA 01 A

Position indicator switching frequency max 5 times per minute

Switching current [A]

Switching cyclescos φ = 1 cos φ = 06

01 500000 50000005 300000 250000

1 200000 1000003 100000 ndash

Limited to max 200000 cycles for heating systems

9 1 VADOutlet pressure pd VAD-25 25 ndash 25 mbar (1 ndash 10 WC) VAD-50 20 ndash 50 mbar (8 ndash 20 WC) VAD-100 35 ndash 100 mbar (14 ndash 40 WC)Combustion chamber control pressure psc (connection psa)

-20 to +20 mbar (-78 to +78 WC)

VAD

pu

pd

(psa)

9 2 VAGOutlet pressure pd 05 ndash 100 mbar (02 ndash 40 WC)Air control pressure psa 05 ndash 100 mbar (02 ndash 40 WC)

Adjusting range at low fire plusmn5 mbar (plusmn2 WC)Transmission ratio of gas to air 11The inlet pressure must always be higher than the air control pressure psa + pressure loss ∆p + 5 mbar (2 WC)

VAGpd

pu

psa

psa

VAGK 1 x 18 coupling for plastic hose (internal dia 39 mm (015) external dia 61 mm (024)) or VAGE 1 x 18 compression fitting for 6 times 1 tube or VAGA 1 x NPT 18 adapter or VAGN zero governor with breathing orifice

9 3 VAH VRHAir control pressure psa 06 ndash 100 mbar (024 ndash 40 WC) Differential air pressure ∆psa (psa - psa-) 06 ndash 50 mbar (024 ndash 197 WC) Differential gas pressure ∆pd (pd - pd-) 06 ndash 50 mbar (024 ndash 197 WC)Transmission ratio of gas to air 11The inlet pressure must always be higher than the differen-tial air pressure ∆psa + pressure loss ∆p + max gas pres-sure on burner + 5 mbar (2 WC)Adjusting range at low fire plusmn5 mbar (plusmn2 WC)

Technical data

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 48

VAHVRH

pd-

pu

psa-

psa

Connection of the air control pressure psaVAHE VRHE 3 x 18 compression fitting for 6 times 1 tube or VAHA VRHA 3 x NPT 18 adapter

9 4 VAVOutlet pressure pd 05 ndash 30 mbar (02 ndash 117 WC)Air control pressure psa 04 ndash 30 mbar (015 ndash 117 WC)Combustion chamber control pressure psc

-20 to +20 mbar (-78 to +78 WC)Min control pressure differential psa - psc 04 mbar (015 WC)Min pressure differential pd - psc 05 mbar (02 WC)Adjusting range at low fire plusmn15 mbar (plusmn06 WC)Transmission ratio of gas to air 061 to 31The inlet pressure pu must always be higher than the air control pressure psa times transmission ratio V + pressure loss ∆p + 15 mbar (06 WC)

pu

pd psapsc

VAV

VAVK 2 x plastic hose couplings (internal dia 39 mm (015) external dia 61 mm (024)) or VAVE 2 x 18 compression fitting for 6 times 1 tube or VAVA 2 x NPT 18 adapter

Technical data

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 49

9 5 Safety-specific characteristic values for VAx 1 ndash 3For SILSuitable for Safety Integrity Level SIL 1 2 3

Diagnostic coverage DC 0

Type of subsystem Type A to EN 61508-2 74312

Operating mode High demand mode pursu-ant to EN 61508-4 3512

For PLSuitable for Performance Level PL a b c d e

Category B 1 2 3 4Common cause failure CCF gt 65Application of essential safety requirements Satisfied

Application of tried-and-tested safety requirements Satisfied

For SIL and PL

B10d value

Operating cyclesVAD VAG VAV VAH 1 10094360VAD VAG VAV VAH 2 8229021VAD VAG VAV VAH 3 6363683

Hardware fault tolerance (1 valve) HFT 0

Hardware fault tolerance (2 valves) HFT 1

Safe failure fraction SFF gt 90Fraction of undetected com-mon cause failures β ge 2

Max service life under operating conditions10 years after date of production plus max 12 year in stor-age prior to first use or once the given number of operating cycles has been reached depending on which is achieved firstThe devices are suitable for single-channel systems (HFT = 0) up to SIL 2PL d and up to SIL 3PL e when two re-dundant valves are installed in a double-channel architecture (HFT = 1) provided that the complete system complies with the requirements of EN 61508ISO 13849

For a glossary of terms see page 53 (Glossary)

Technical data

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 50

nop 1hnop 1a

sB10d

T10d aPFHD (1 VAx) 1h

PFHD (2 VAx) 1h

PFDavg (1 VAx)

PFDavg (2 VAx)

Technical data gt Safety-specific characteristic values for VAx 1 ndash 3

9 5 1 Determining the PFHD value the λD value and the MTTFd value

PFHD = λD = x nop= 1MTTFd

01B10d

PFDavg = x λD x 24 x 365 x T10d 12

Type

Cycle time

suitable for

suitable for

PFHD = Probability of dangerous failure (HDM = high de-mand mode) [1hour]PFDavg = Average probability of dangerous failure on de-mand (LDM = low demand mode)λD = Mean dangerous failure rate [1hour]MTTFd = Mean time to dangerous failure [hours]nop = Demand rate (mean number of annual operations) [1hour]

9 5 2 Calculating the PFHD and PFDavg

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 51

VAD VAG VAH VAV

H1

Rp frac14(NPT frac14)

H2

E

LF

F

H4

H3

B

VAxS VAxF

L2G

G

Technical data

9 6 Dimensions

Type

Connec-tion Dimensions

WeightRpNPT DN

L L2 E F G H1 H2 H3 H4 Bmm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch kg lbs

VAx 115 12 15 75 29 ndash ndash 75 29 15 06 ndash ndash 143 56 82 32 161 63 117 46 97 38 18 40VAH 115 12 15 75 29 ndash ndash 75 29 15 06 ndash ndash 143 56 100 39 161 63 135 53 97 38 2 44VAx 120 34 20 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 82 33 161 63 117 46 97 38 19 42VAH 120 34 20 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 100 39 161 63 135 53 97 38 21 46VAx 125 1 25 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 82 33 161 63 117 46 97 38 19 42VAH 125 1 25 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 100 39 161 63 135 53 97 38 21 46VAx 240 112 40 128 50 200 79 85 33 29 11 66 26 170 67 112 44 191 75 162 64 125 49 44 97VAH 240 112 40 128 50 200 79 85 33 29 11 66 26 170 67 132 52 191 75 182 72 125 49 47 104VAx 350 2 50 155 61 230 91 85 33 36 14 74 29 180 70 135 53 201 79 196 77 160 63 61 134VAH 350 2 50 155 61 230 91 85 33 36 14 74 29 180 70 156 61 201 79 217 85 160 63 64 141

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 52

10 Converting unitssee wwwadlatusorg

11 Maintenance cyclesAt least once per annum at least twice per annum for biologi-cally produced methaneIf the flow rate drops clean the strainer

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 53

12 Glossary12 1 Diagnostic coverage DCMeasure of the effectiveness of diagnostics which may be determined as the ratio between the failure rate of detected dangerous failures and the failure rate of total dangerous failuresNOTE Diagnostic coverage can exist for the whole or parts of a safety-related system For example diagnostic cover-age could exist for sensors andor logic system andor final elements Unit see EN ISO 13849-12008

12 2 Mode of operationHigh demand mode or continuous modeOperating mode where the frequency of demands for opera-tion made on a safety-related system is greater than one per year or greater than twice the proof-test frequencysee EN 61508-42008

12 3 CategoryClassification of the safety-related parts of a control system in respect of their resistance to faults and their subsequent behaviour in the fault condition and which is achieved by the structural arrangement of the parts fault detection andor by their reliability see EN ISO 13849-12008

12 4 Common cause failure CCFFailures of different items resulting from a single event where these failures are not consequences of each othersee EN ISO 13849-12008

12 5 Fraction of undetected common cause failures β Fraction of undetected failures of redundant components due to a single event whereby these failures are not based on mutual causesNOTE β is expressed as a fraction in the equations and as a percentage elsewheresee EN 61508-62010

12 6 B10d valueMean number of cycles until 10 of the components fail dan-gerouslysee EN ISO 13849-12008

12 7 T10d valueMean time until 10 of the components fail dangerouslysee EN ISO 13849-12008

12 8 Hardware fault tolerance HFTA hardware fault tolerance of N means that N + 1 is the mini-mum number of faults that could cause a loss of the safety functionsee IEC 61508-22010

12 9 Mean dangerous failure rate λD Mean rate of dangerous failures during operation time (T10d) Unit 1hsee EN ISO 13849-12008

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 54

12 10 Safe failure fraction SFFFraction of safe failures related to all failures which are as-sumed to appearsee EN 13611A22011

12 11 Probability of dangerous failure PFHD Value describing the likelihood of dangerous failure per hour of a component for high demand mode or continuous mode Unit 1hsee EN 13611A22011

12 12 Mean time to dangerous failure MTTFd Expectation of the mean time to dangerous failuresee EN ISO 13849-12008

12 13 Demand rate nop Mean number of annual operationssee EN ISO 13849-12008

12 14 Average probability of dangerous failure on demand PFDavg (LDM = 1 ndash 10 switching cyclesyear)Average probability of a dangerous failure of the safety function on demand (LDM = low demand mode)see EN 61508-6

Glossary

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415

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Remarks

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Elster GmbH Postfach 2809 middot 49018 Osnabruumlck Strotheweg 1 middot 49504 Lotte (Buumlren) GermanyT +49 541 1214-0 F +49 541 1214-370 infokromschroedercomwwwkromschroedercom

The current addresses of our international agents are available on the Internetwwwkromschroederdeindexphpid=718ampL=1

We reserve the right to make technical modifications in the interests of progressCopyright copy 2015 Elster GmbH All rights reserved

Contact

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0325

0530

  • Pressure regulators with solenoid valve VAD VAG VAV VAH
  • Flow rate regulator VRH
  • Pressure regulators with double solenoid valve VCD VCG VCV VCH
  • Contents
  • 1 Application
    • 11 Examples of application
      • 111 Constant pressure control
      • 112 Constant pressure control with two gas solenoid valves
      • 113 Constant pressure control with max pressure switch
      • 114 Constant pressure control with non-controlled pilot gas outlet
      • 115 Modulating control
      • 116 Modulating control with two gas solenoid valves
      • 117 Modulating control with two gas solenoid valves and inlet pressure switch
      • 118 HighLow control
      • 119 Zero pressure control
      • 1110 Staged flow rate control
      • 1111 Continuous or staged flow rate control
      • 1112 Modulating control with variable airgas ratio control with gas solenoid valve
      • 1113 Modulating control in residential heat generation
          • 2 Certification
          • 3 Function
            • 31 VAD VAG VAH VRH VAV
              • 311 Pressure regulator for gas VAD
              • 312 Airgas ratio control VAG
              • 313 Flow rate regulators VAH VRH
              • 314 Variable airgas ratio control VAV
              • 315 Pressure regulator with gas solenoid valve VAxS position indicator with visual indicator
                • 32 Animation
                • 33 Connection diagram
                  • 331 VAx with M20 cable gland
                  • 332 VAx with plug
                  • 333 VAS with VADVAGVAHVAV with M20 cable gland
                  • 334 VAS with VADVAGVAHVAV with plug
                      • 4 Replacement possibilities for MODULINE pressure regulators with gas solenoid valve
                        • 41 GVS GVI GVIB GVR and GVRH are to be replaced by VAD VAG VAG+VAS VAH and VAV
                          • 5 Flow rate
                            • 51 Selection example for VAD
                              • 511 Calculate VAD
                                • 52 Selection example for VAG VAH VRH VAV
                                  • 521 CalculateVAG VxHVAV
                                    • 53 Selection example for zero governor VAGN
                                      • 531 Calculate VAGN
                                          • 6 Selection
                                            • 61 Selection table for pressure regulator with solenoid valve VAD
                                            • 62 Type code for VAD
                                            • 63 Selection table for airgas ratio control with solenoid valve VAG flow rate regulators VAH VRH
                                            • 64 Type code for VAG VAH VRH
                                            • 65 Selection table for variable airgas ratio control with solenoid valve VAV
                                            • 66 Type code for VAV
                                            • 67 Accessories
                                              • 7 Project planning information
                                                • 71 Installation
                                                  • 711 Installation position
                                                    • 72 Setting the low-fire rate on VAG VAH VRH VAV
                                                    • 73 Setting the high-fire rate on VAV
                                                      • 731 Calculation
                                                          • 8 Accessories
                                                            • 81 Gas pressure switch DGVC for VAx VRH
                                                            • 82 Gas pressure switch DGVCT for VAxT VRHT
                                                            • 83 Bypass valvepilot gas valve VAS 1
                                                              • 831 VAS 1 attached to VADVAGVAHVAV 1
                                                              • 832 VAS 1 attached to VADVAGVAHVAV 2 VADVAGVAHVAV 3
                                                              • 833 Flow rate
                                                                • 84 Bypass valvepilot gas valve VBY 8 for VADVAGVAHVAV 1
                                                                  • 841 Scope of delivery VBY 8I as bypass valve
                                                                  • 842 Scope of delivery VBY 8R as pilot gas valve
                                                                  • 843 Selection
                                                                  • 844 Type code
                                                                  • 845 Flow rate
                                                                  • 846 Technical data
                                                                    • 85 Tightness control TC 116V
                                                                    • 86 Pressure test points
                                                                    • 87 Cable gland set
                                                                    • 88 Seal set VA 1thinspndashthinsp3
                                                                    • 89 Differential pressure orifice
                                                                    • 810 Retaining frame
                                                                    • 811 Attachment block
                                                                    • 812 Gas control line
                                                                    • 813 Measuring orifice VMO
                                                                    • 814 Filter module VMF
                                                                    • 815 Fine-adjusting valve VMV
                                                                      • 9 Technical data
                                                                        • 91 VAD
                                                                        • 92 VAG
                                                                        • 93 VAH VRH
                                                                        • 94 VAV
                                                                        • 95 Safety-specific characteristic values for VAx 1thinspndashthinsp3
                                                                          • 951 Determining the PFHD value the λD value and the MTTFd value
                                                                          • 952 Calculating the PFHD and PFDavg
                                                                            • 96 Dimensions
                                                                              • 10 Converting units
                                                                              • 11 Maintenance cycles
                                                                              • 12 Glossary
                                                                                • 121 Diagnostic coverage DC
                                                                                • 122 Mode of operation
                                                                                • 123 Category
                                                                                • 124 Common cause failure CCF
                                                                                • 125 Fraction of undetected common cause failures β
                                                                                • 126 B10d value
                                                                                • 127 T10d value
                                                                                • 128 Hardware fault tolerance HFT
                                                                                • 129 Mean dangerous failure rate λD
                                                                                • 1210 Safe failure fraction SFF
                                                                                • 1211 Probability of dangerous failure PFHD
                                                                                • 1212 Mean time to dangerous failure MTTFd
                                                                                • 1213 Demand rate nop
                                                                                • 1214 Average probability of dangerous failure on demand PFDavg
                                                                                  • Feedback
                                                                                  • Contact
                                                                                      1. naechste_Seite 24
                                                                                      2. naechste Seite 18
                                                                                      3. naechste Seite 6
                                                                                      4. naechste Seite 16
                                                                                      5. naechste Seite 14
                                                                                      6. naechste Seite 25
                                                                                      7. naechste_Seite 11
                                                                                      8. naechste_Seite 17
                                                                                      9. fbArbeitspunkt_Min Ja
                                                                                      10. fbArbeitspunkt Ja
                                                                                      11. ftProgramm Standard-Programm
                                                                                      12. fz_kv
                                                                                      13. fz_pe 80
                                                                                      14. fz_pG 60
                                                                                      15. fzDelta_p_Soll 20
                                                                                      16. ftEinheit_Druck mbar
                                                                                      17. fatTyp [115]
                                                                                      18. fbArbeitspunkt_Min_2 Ja
                                                                                      19. fbArbeitspunkt_2 Ja
                                                                                      20. ftRegler_Typ VAG
                                                                                      21. ftProgramm_2 Standard-Programm
                                                                                      22. fz_kv_2
                                                                                      23. fatMedium [08]
                                                                                      24. fzDichte 08
                                                                                      25. ftEinheit_Dichte kgm3
                                                                                      26. fzV_Norm 30
                                                                                      27. ftEinheit_Volstrom m3h
                                                                                      28. fz_pe_2 80
                                                                                      29. fz_pG_2 60
                                                                                      30. fzDelta_p_Soll_2 20
                                                                                      31. ftEinheit_Druck2 [mbar]
                                                                                      32. ftEinheit_Geschw [ms]
                                                                                      33. fatTyp_2 [10954451150103322]
                                                                                      34. fbArbeitspunkt_Min_3 Ja
                                                                                      35. fbArbeitspunkt_3 Ja
                                                                                      36. ftProgramm_3 Standard-Programm
                                                                                      37. fz_kv_3
                                                                                      38. fz_pe_3 20
                                                                                      39. fz_pG_3 0
                                                                                      40. fzDelta_p_Soll_3 20
                                                                                      41. fatTyp_3 [123]
                                                                                      42. fatSchaltleistung [6363683]
                                                                                      43. fz_nop_Stunde 1
                                                                                      44. fz_nop_Jahr 8760
                                                                                      45. fzZyklus 3600
                                                                                      46. fzB10d 6363683
                                                                                      47. fzT10d 10
                                                                                      48. fzPFHd_1V 15714170551864384e-8
                                                                                      49. fzPFDavg_1V
                                                                                      50. ftGeeignet_1V PL d SIL 2
                                                                                      51. fzPFHd_2V 33505832253532625e-10
                                                                                      52. fzPFDavg_2V
                                                                                      53. ftGeeignet_2V PL e SIL 3
                                                                                      54. ftUebersicht Off
                                                                                      55. ftVerstaendlichkeit Off
                                                                                      56. ftFehlende_Info
                                                                                      57. ftUmfang Off
                                                                                      58. ftVerwendung_1 Off
                                                                                      59. ftVerwendung_2 Off
                                                                                      60. ftVerwendung_3 Off
                                                                                      61. ftVerwendung_4 Off
                                                                                      62. ftNavigation Off
                                                                                      63. ftTaetigkeitsbereich Off
                                                                                      64. ftBemerkung
                                                                                      65. Michael Rehkamp Elster Kromschroumlder>btnSenden
Page 2: VAD, VAG, VAV, VAH, VRH, VCD, VCG, VCV, VCH · PDF fileVAD, VAG, VAH, VAV, VRH, VCD, VCG, VCV, VCH · Edition 04.15 6 VAD VAD VAS 1 .1 Examples of application 1 .1 .1 Constant pressure

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 2 = To be continued

ContentsPressure regulators with solenoid valve VAD VAG VAV VAH 1Flow rate regulator VRH 1Pressure regulators with double solenoid valve VCD VCG VCV VCH 1Contents 21 Application 411 Examples of application 6

111 Constant pressure control 6112 Constant pressure control with two gas solenoid valves 6113 Constant pressure control with max pressure switch 7114 Constant pressure control with non-controlled pilot gas outlet 7115 Modulating control 8116 Modulating control with two gas solenoid valves 8117 Modulating control with two gas solenoid valves and inlet pressure switch 9118 HighLow control 9119 Zero pressure control 101110 Staged flow rate control 111111 Continuous or staged flow rate control 121112 Modulating control with variable airgas ratio control with gas solenoid valve 121113 Modulating control in residential heat generation 13

2 Certification 143 Function 1531 VAD VAG VAH VRH VAV 15311 Pressure regulator for gas VAD 15312 Airgas ratio control VAG 16313 Flow rate regulators VAH VRH 17314 Variable airgas ratio control VAV 18315 Pressure regulator with gas solenoid valve VAxS position indicator with visual indicator 19

32 Animation 2033 Connection diagram 21

331 VAx with M20 cable gland 21332 VAx with plug 21333 VAS with VADVAGVAHVAV with M20 cable gland 21334 VAS with VADVAGVAHVAV with plug 21

4 Replacement possibilities for MODULINE pressure regulators with gas solenoid valve 2241 GVS GVI GVIB GVR and GVRH are to be replaced by VAD VAG VAG+VAS VAH and VAV 22

5 Flow rate 2451 Selection example for VAD 24511 Calculate VAD 24

52 Selection example for VAG VAH VRH VAV 25521 Calculate VAG VxH VAV 25

53 Selection example for zero governor VAGN 26531 Calculate VAGN 26

6 Selection 2761 Selection table for pressure regulator with solenoid valve VAD 2762 Type code for VAD 2863 Selection table for airgas ratio control with solenoid valve VAG flow rate regulators VAH VRH 2964 Type code for VAG VAH VRH 3065 Selection table for variable airgas ratio control with solenoid valve VAV 3166 Type code for VAV 3267 Accessories 33

7 Project planning information 3471 Installation 34

711 Installation position 3572 Setting the low-fire rate on VAG VAH VRH VAV 3673 Setting the high-fire rate on VAV 36

731 Calculation 36

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 3

8 Accessories 3781 Gas pressure switch DGVC for VAx VRH 3782 Gas pressure switch DGVCT for VAxT VRHT 3783 Bypass valvepilot gas valve VAS 1 38831 VAS 1 attached to VADVAGVAHVAV 1 38832 VAS 1 attached to VADVAGVAHVAV 2 VADVAGVAHVAV 3 38833 Flow rate 39

84 Bypass valvepilot gas valve VBY 8 for VADVAGVAHVAV 1 40

841 Scope of delivery VBY 8I as bypass valve 40842 Scope of delivery VBY 8R as pilot gas valve 40843 Selection 40844 Type code 40845 Flow rate 41846 Technical data 41

85 Tightness control TC 116V 4286 Pressure test points 4287 Cable gland set 4288 Seal set VA 1 ndash 3 4389 Differential pressure orifice 43810 Retaining frame 44811 Attachment block 44812 Gas control line 44813 Measuring orifice VMO 45814 Filter module VMF 45815 Fine-adjusting valve VMV 45

9 Technical data 4691 VAD 4792 VAG 4793 VAH VRH 4794 VAV 4895 Safety-specific characteristic values for VAx 1 ndash 3 49

951 Determining the PFHD value the λD value and the MTTFd value 50

952 Calculating the PFHD and PFDavg 5096 Dimensions 51

10 Converting units 5211 Maintenance cycles 5212 Glossary 53121 Diagnostic coverage DC 53122 Mode of operation 53123 Category 53124 Common cause failure CCF 53125 Fraction of undetected common cause failures β 53126 B10d value 53127 T10d value 53128 Hardware fault tolerance HFT 53129 Mean dangerous failure rate λD 531210 Safe failure fraction SFF 541211 Probability of dangerous failure PFHD 541212 Mean time to dangerous failure MTTFd 541213 Demand rate nop 541214 Average probability of dangerous failure on demand PFDavg 54

Feedback 55Contact 55

Contents

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 4

VAD VAG VAH VAV VRH

1 ApplicationRegulators with solenoid valves are designed for shut-off and thanks to the servo technology for precise control of the gas supply to gas burners and gas appliances They are used in gas control and safety systems in all sectors of the iron steel glass and ceramics industries as well as in residential or commercial heat generation such as the packaging paper and foodstuffs industries

VADConstant pressure governor Class A with high control accu-racy for excess air burners atmospheric burners or single-stage forced draught burners Pressure preset via setpoint spring In the case of fluctuating furnace or kiln pressures the furnace chamber pressure may also be connected for maintaining a constant burner capacity

VAGAirgas ratio control Class A for maintaining a constant airgas pressure ratio for modulating-controlled burners or with VAS 1 bypass valve for stage-controlled burners Pressure preset by the air control line

The VAGN can also be used as a zero governor for gas engines

VAH VRHFlow rate regulators VAH and VRH are used to maintain a constant gasair ratio for modulating-controlled and stage-controlled burners The gas flow rate is controlled proportio-nally to the air flow rateIn addition flow rate regulator VAH is designed as a gas solenoid valve and shuts off the gas or air supply safely

VAVVariable airgas ratio control Class A for maintaining a con-stant gasair pressure ratio for modulating-controlled burners Pressure preset by the air control line The ratio of gas pressure to air pressure remains constant It can be set from 061 to 31 Pressure fluctuations in the combustion chamber can be compensated via the combustion chamber control pressure

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 5

Application

Pressure regulator on excess air burners in the ceramics in-dustry

Airgas ratio control on melting furnace for ensuring stoichio-metric combustion over the entire capacity range

Aluminium age-hardening furnace with airgas ratio controls for air deficiency cut-out

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 6

VAD

VADVAS

1 1 Examples of application1 1 1 Constant pressure controlThe pressure regulator with gas solenoid valve VAD maintains the set gas outlet pressure pd constant when subject to differing flow rates If a second gas so-lenoid valve is used upstream of the VAD this complies with the requirements of EN 746-2 for two Class A gas solenoid valves connected in series

1 1 2 Constant pressure control with two gas solenoid valvesThe pressure regulator with gas solenoid valve VAD maintains the set gas outlet pressure pd constant when subject to differing flow rates

Application

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 7

VAD

DGCmin DGCmax

VASPZL PZH

DGCmin DGCmax

VADVAS

VAS

PZL PZH

1 1 3 Constant pressure control with max pressure switchIn this example the minimum inlet pres-sure pu and the maximum outlet pres-sure pd are monitored with the pressure switches DGC The simple attachment of the pressure switch module makes installation easier

1 1 4 Constant pressure control with non-controlled pilot gas outletIn this application the pilot burner is supplied with a high inlet pressure via the pilot gas outlet The simple attach-ment of the bypass valve module makes installation easier The minimum inlet pressure pu and the maximum outlet pressure pd are monitored with the pres-sure switches DGC

Application gt Examples of application

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 8

psa

psa

VAG

MIC + BVA

psa

psaM

IC + BVA

VASVAG

1 1 5 Modulating controlThe gas outlet pressure pd is con trolled via the airgas ratio control with gas so-lenoid valve VAG The gas outlet pres-sure pd follows the changing air control pressure psa The ratio of gas pressure to air pressure remains constant The VAG is suitable for a control range up to 101If a second solenoid valve is used up-stream of the VAG this complies with the requirements of EN 746-2 for two Class A valves connected in series

1 1 6 Modulating control with two gas solenoid valvesThe gas outlet pressure pd is con trolled via the airgas ratio control with gas so-lenoid valve VAG The gas outlet pres-sure pd follows the changing air control pressure psa The ratio of gas pressure to air pressure remains constant The VAG is suitable for a control range up to 101The gas line is two Class A shut-off valves connected in series in accordance with the requirements of EN 746-2

Application gt Examples of application

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 9

DGCmin

PZL

psa

psa

M

IC + BVA

VAS

VAG

psa

DGCmin

PZL

psa

M

IC 40 + BVA

VAS

VAG

VAS 1

1 1 7 Modulating control with two gas solenoid valves and inlet pressure switchIn this case the minimum inlet pressure pu is monitored by the pressure switch DGC The simple attachment of the pressure switch module makes instal-lation easier

1 1 8 HighLow controlAt high fire the gas outlet pressure pd follows the air control pressure psa The ratio of gas pressure to air pressure re-mains constant Low fire is determined via the bypass valve VAS 1 Here as well the simple attachment of the bypass valve module makes installation easier

Application gt Examples of application

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 10

Venturi

DGCmin

PZL

M

IC + BVA

VASVAGN

1 1 9 Zero pressure controlIn this application the control air pres-sure is the atmospheric air pressure The air flow rate generates a negative pressure in the gas pipe via the Venturi This negative pressure is compensated by the airgas ratio control with gas solenoid valve VAGN The greater the negative pressure the greater the gas flow rate

Application gt Examples of application

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 11

BVHM + MB7L

VMV

ECOMAX

VASN

BCU BZA

Prozess SteuerungProcess Control (PCC)

AKT

psa-

psa

pd-

VAH

1 1 10 Staged flow rate controlThis application shows the VAH on a self recuperative burnerThe pressure loss in the recuperator de-pends on the furnace or kiln temperature When the furnace or kiln temperature is increased (at a constant air supply pres-sure) the flow rate drops This change in the air flow rate is measured by the orifice and the VAH changes the gas volume accordinglyThe air index (lambda) can be set using the fine-adjusting valve VMV

Application gt Examples of application

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 12

M

IC + BVA

VMV

VMO

VAH

VAS

psa-psa

pd-

psa

psc

DGCmin

PZL

psa

psc

M

IC + BVA

VAS VAV

1 1 11 Continuous or staged flow rate controlThis application shows flow rate control for a radiant tube burner system with plug-in recuperator for air preheatingThere are temperature-dependent air pressure losses in the recuperator The ratio of gas pressure to air pressure does not remain constant The fluctuating air flow rate is measured at the measuring orifice VMO and the VAH controls the gas flow rate proportionallyThe air index (lambda) can be set using the fine-adjusting valve VMV

Application gt Examples of application

1 1 12 Modulating control with variable airgas ratio control with gas solenoid valveThe ratio of gas pressure to air pressure can be adjusted infinitely between 061 and 31 Pressure fluctuations in the com-bustion chamber can be compensated via the combustion chamber control pressure psc see page 15 (Function)

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 13

DGCmin

PZL

psa

psc

VAS VAV

1 1 13 Modulating control in residential heat generationThis application shows the variable airgas ratio control with solenoid valve VAV fitted to a modulating-controlled forced draught burnerThe combustion air volume is set via a butterfly valve for air or by adjusting the fan speed

Application gt Examples of application

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 14

2 CertificationCertificates ndash see Docuthek

VAD VAG VAV VAH certified to SIL and PL

For systems up to SIL 3 pursuant to EN 61508 and PL e pursu-ant to ISO 13849

VAD VAG VAV VAHEU certified pursuant to

ndash Gas Appliances Directive (2009142EC) in conjunction with EN 13611 EN 161 EN 88-1 EN 126 and EN 1854

Meets the requirements of thendash Low Voltage Directive (200695EC)ndash EMC Directive (2004108EC)

VAD VAG VAV VAH FM approved

Factory Mutual Research Class 7400 Process Control Valves Designed for applications pursuant to NFPA 85 and NFPA 86 www approvalguide com

VAD VAG ANSICSA approved

American National Standards InstituteCanadian Standards Association ndash ANSI Z21 21CSA 6 5 ANSI Z21 18 and CSA 6 3

wwwcsagrouporg ndash Class number 3371-83 (natural gas LPG) 3371-03 (natural gas propane)

VAD VAG VAV UL listed

Underwriters Laboratories ndash UL 429 ldquoElectrically operated valvesrdquo wwwulcom Tools (at the bottom of the page) Online Certifications Directory

VAD VAG VAV AGA approved

AGA

Australian Gas Association Approval No 5319 httpwww aga asn auproduct_directory

Eurasian Customs Union

The product VAD VAG VAV VAH VCD VCG VCV VCH meets the technical specifications of the Eurasian Customs Union (the Russian Federation Belarus Kazakhstan)

Approval does not apply for 100 V AC and 200 V AC

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 15

3 Function3 1 VAD VAG VAH VRH VAVThe regulator is closed when it is disconnected from the power supplyOpening connect the system to the electrical power supply (alternating voltage will be rectified) The blue LED lights up The coilrsquos magnetic field pulls the armature upwards and clears the supply nozzle for the gas inlet pressure pu The gas passes through the internal impulse tube to the adjustment diaphragm and then pushes the valve disc open The outlet pressure is applied to the servo diaphragm via the internal feedback

The servo regulator then maintains a set constant outlet pres-sure pd

3 1 1 Pressure regulator for gas VADThe nominal outlet pressure pd is defined by the control spring

Servoregulator

Valve

Armature

Valve disc

Adjustmentdiaphragm

Servodiaphragm

Internalfeedback

Controlspring

Solenoid coil

Supplynozzle

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 16

3 1 2 Airgas ratio control VAGThe airgas ratio control VAG controls the outlet pressure pd depending on the variable air control pressure psaThe ratio of gas pressure to air pressure remains constant 11 The VAG is suitable for a control range up to 101If the burner operates at low-fire rate the gasair mixture can be changed by adjusting the zero point spring ldquoNrdquo

Function

psa

pd

Zero point setting N zero point spring

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 17

Function

3 1 3 Flow rate regulators VAH VRHThe flow rate regulators VAH VRH control the gas flow rate depending on the variable air flow rate The ratio of gas flow rate to air flow rate remains constant If the burner operates at low-fire rate the gasair mixture can be changed by adjusting the zero point spring ldquoNrdquoIn addition flow rate regulator VAH is designed as a gas solenoid valve and shuts off the gas or air supply safely

psa

psa-

pd-

pdInternal feedback

Zero point setting N zero point spring

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 18

3 1 4 Variable airgas ratio control VAVThe servo regulator maintains a set constant outlet pressure pd The variable airgas ratio control VAV controls the outlet pressure pd depending on the variable air control pressure psa The ratio of gas pressure to air pressure remains constantThe settings N and V can be changed and read off from both sides of the unit using the adjusting screwsThe ratio of gas pressure to air pressure at low-fire rate can be changed by adjusting the zero point setting N By turning the adjusting screw ldquoNrdquo the force of the zero point spring and thus the zero point is changed by plusmn 15 mbar (06 WC) see page 34 (Project planning information)The high-fire rate is set by turning the adjusting screw ldquoVrdquo until the required flue gas values are achieved see page 34 (Project planning information) The ratio of gas pressure to air pressure can be set from 061 to 31The settings N and V influence each other and the adjustment process must be repeated if necessaryThe outlet pressure pd is applied to the servo diaphragm via the internal feedback The combustion chamber control pres-sure psc is transmitted to the space under the air and servo diaphragms via an impulse lineThe pressure differential psa - psc is achieved on the air diaphragm and the pressure differential pd - psc on the servo diaphragm This ensures that pressure fluctuations in the combustion cham-ber can be compensated The flue gas values remain constant in the case of fluctuations in the combustion chamber pressure (pd - psc) = (psa - psc) times V + N

Function

pdpsc

psa

Air diaphragm

Transmission ratio V

Zero point setting N zero point spring

Internalfeedback

Adjustment diaphragm

Servo diaphragm

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 19

1 COM

2 NO

3 NC

3 1 5 Pressure regulator with gas solenoid valve VAx S position indicator with visual indicatorOpening when the pressure regulator is opened the posi-tion indicator switches The visual indicator is activated The ldquoopenrdquo signal is marked in red The double valve seat opens to release the volume of gasClosing the pressure regulator VAx is disconnected from the voltage supply and the closing spring presses the double valve disc on to the valve seat The position indicator is actuated The visual indicator is white for ldquoclosedrdquoThe actuator cannot be rotated on a pressure regulator with a position indicator and a visual indicatorNOTE NFPA 86 ndash the following must be taken into account as soon as the capacity of the pilot or main burner exceeds 117 kW (400000 BTUh) safety shut-off valve VASS must be fitted with a proof of closure overtravel switch with a visual position indicator and the burner-side pressure regulator with gas solenoid valve VAxS must also be fitted with a position indicator with visual indicator The closed position can be verified using the proof of closure switch of the gas solenoid valve VASS

Function

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 20

3 2 AnimationThe interactive animation shows the function of the valVario controls VADVAGVAHVAVClick on the picture The animation can be controlled using the control bar at the bottom of the window (as on a DVD player) To play the animation you will need Adobe Reader 7 or a newer version If you do not have Adobe Reader on your system you can download it from the Internet

Go to wwwadobecom click on ldquoAdobe Readerrdquo at the bottom of the page and follow the instructionsIf the animation does not start to play you can download it from the document library (wwwdocuthekcom) as an inde-pendent application

Function

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 21

3 3 Connection diagramWiring to EN 60204-1Connection diagram for VAxS with position indicator ndash see page 19 (Pressure regulator with gas solenoid valve VAxS position indicator with visual indicator)

3 3 1 VAx with M20 cable gland

L1 (+)

N (ndash)

3 3 2 VAx with plug

1 = N (-)

2 = L1 (+)

3 3 3 VAS with VADVAGVAHVAV with M20 cable glandL1V1 (+)

N (-)

L1V2 (+)

3 3 4 VAS with VADVAGVAHVAV with plug2 = L1V1 (+)

1 = N (-)

3 = L1V2 (+)

Function

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 22

4 Replacement possibilities for MODULINE pressure regulators with gas solenoid valve4 1 GVS GVI GVIB GVR and GVRH are to be replaced by VAD VAG VAG+VAS VAH and VAV

Type TypeGVS Pressure regulator with gas solenoid valve Pressure regulator with gas solenoid valve VADGVI Airgas ratio control with gas solenoid valve Airgas ratio control with gas solenoid valve VAG

GVIB Airgas ratio control with gas solenoid valve and bypass valve

Airgas ratio control with gas solenoid valve and bypass valve VAG+VAS

GVRH Flow rate regulator with gas solenoid valve Flow rate regulator with gas solenoid valve VAHGVR Variable airgas ratio control with gas solenoid valve Variable airgas ratio control with solenoid valve VAV115125 Flange 38 Size 115

Size 125 on request

115125 Flange frac12 Size 115

Size 125 Size 1 DN 15 115

115125 Flange frac34 Size 115

Size 125 Size 1 DN 20 120

115125 Flange 1 Size 115

Size 125 Size 1 DN 25 125

232240 Flange 1 Size 232

Size 240 on request

232240 Flange 1frac12 Size 232

Size 240 Size 2 DN 40 240

350 Flange 1frac12 Size 350 on request350 Flange 2 Size 350 Size 3 DN 50 350ML MODULINE + Rp internal thread connection fl anges Rp internal thread RTML MODULINE + NPT internal thread connection fl anges NPT internal thread N01 pu max 100 mbar (15 psig) pu max 500 mbar (7 psig) 02 200 mbar (3 psig) 500 mbar (7 psig)

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 23

Replacement possibilities for MODULINE pressure regulators with gas solenoid valve gt GVS GVI GVIB GVR and GVRH are to be replaced by VAD VAG VAG+VAS VAH and VAV

ContinuationType Type

Quick opening Quick opening NF1 Control ratio 11 Control ratio 11 K Mains voltage 24 V DC Mains voltage 24 V DC K

ndash 100 V AC PQ 120 V AC 120 V AC Q

ndash 200 V AC YT 220240 V AC 230 V AC W3 Electrical connection via terminals Electrical connection via terminals 6 Electrical connection via socket Electrical connection via socket 9 Metal terminal connection box Electrical connection via terminals S Position indicator Position indicator with visual indicator SG Position indicator for 24 V Position indicator for 24 V with visual indicator GM Suitable for biologically produced methane Suitable for biologically produced methane

Pressure test point at the inlet Pressure test point at the inlet and outlet Outlet pressure pd -25

Outlet pressure pd 25 ndash 25 mbar (1 ndash 10 WC)

2 ndash 90 mbar (08 ndash 36 WC) 20 ndash 50 mbar (8 ndash 20 WC) -5035 ndash 100 mbar (14 ndash 40 WC) -100Standard seat A

ExampleGVS 350ML01T3with Rp 2 connection flanges

ExampleVAD 350RNW-100A

with test points

= standard = available Pressure test points may be attached at the left- andor right-hand side Position indicator with visual indicator can be attached at the left- or right-hand side

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 24

∆p [i

nch

WC]

Qn [SCFH]100 400 600 4000 60001000 200020 30 40 50 200 3006015 80

1

08

1

2

3

4

56

8

10

20

30

40

5060

80

100

200

∆p [m

bar]

5

8

3

20

10

30

40

80

60

300

400

50

04 06 1 2 3 4 5 808 10 20 30 402

03 60 100 200

100

200

500

1

3

2

04 06 08 1 2 3 4 5 6 8 10 20 30 40

04 06 08 1 2 3 4 5 6 8 10

200

80 10020 3003

03Qn [m3h]

02

50 60 80 100

40 50 60

VAD

115

B

VAD

120

AVA

D 12

5A

P1P2

VAD

240

AVA

D 35

0A

= natural gas (ρ = 080 kgm3) = propane (ρ = 201 kgm3) = air (ρ = 129 kgm3)

The characteristic flow rate curves have been meas-ured with the specified flanges and a fitted strainer If two or more valves are combined the pressure loss of each additional valve drops by approx 5

metric imperial

Enter densityFlow rate Qn

Inlet pressure pu

Outlet pressure pd

Product RV v

Pressure loss ∆p

∆pmin

5 Flow rate5 1 Selection example for VADNatural gas Flow rate Qmax = 30 m3h Inlet pressure pu = 80 mbar Outlet pressure pd = 60 mbarThe desired control ratio from high-fire to low-fire rate is RV = 101High fire ∆p = pu - pd = 20 mbar Point P1Low fire Point P2 Qmin = 26 m3h at ∆p = 20 mbar RV = Qmax Qmin = 1151

Point P1 and point P2 must be within the working range of a unit size We recommend that you select the smallest size to achieve the best control properties

5 1 1 Calculate VAD

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 25

∆p [i

nch

WC]

Qn [SCFH]100 400 600 4000 60001000 200020 30 40 50 200 3006015 80

1

08

1

2

3

4

56

8

10

20

30

40

5060

80

100

200

∆p [m

bar]

5

8

3

20

10

30

40

80

60

300

400

50

04 06 1 2 3 4 5 808 10 20 30 402

03 60 100 200

100

200

500

1

3

2

04 06 08 1 2 3 4 5 6 8 10 20 30 40

04 06 08 1 2 3 4 5 6 8 10

200

80 10020 3003

03Qn [m3h]

02

50 60 80 100

40 50 60

= pd min lt 5 mbar

VAG

VxH

VAV

115

BVA

GV

xHV

AV 12

0A

VAG

VxH

VAV

125

A

P1

P2

VAG

VxH

VAV

240

AVA

GV

xHV

AV 3

50A

= natural gas (ρ = 080 kgm3) = propane (ρ = 201 kgm3) = air (ρ = 129 kgm3)

The characteristic flow rate curves have been meas-ured with the specified flanges and a fitted strainer If two or more valves are combined the pressure loss of each additional valve drops by approx 5

5 2 Selection example for VAG VAH VRH VAV Natural gas Flow rate Qmax = 30 m3h Inlet pressure pu = 80 mbar Outlet pressure pd max VAG = 60 mbarThe desired control ratio from high-fire to low-fire rate is RV = 101High fire ∆p = pu - pd max = 20 mbar Point P1Low fire pd min = pd max RV2 = 06 mbar Qmin = Qmax RV = 3 m3h ∆p = pu - pd min = 794 mbar Point P2 select VAG 120APoint P1 and point P2 must be within the working range of a unit size We recommend that you select the smallest size to achieve the best control properties

metric imperial

Enter densityFlow rate Qn

Inlet pressure pu

Outlet pressure pd

Product RV v

5 2 1 Calculate VAG VxH VAV

Pressure loss ∆p

∆pmin

Flow rate

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 26

∆p [i

nch

WC]

Qn [SCFH]100 400 600 4000 60001000 200020 30 40 50 200 3006015 80

1

08

1

2

3

4

56

8

10

20

30

40

5060

80

100

200

∆p [m

bar]

5

8

3

20

10

30

40

80

60

300

400

50

04 06 2 3 4 5 808 10 20 30 402

03 60 100 200

100

200

500

1

3

2

04 06 08 1 2 3 4 5 6 8 10 20 30 40

04 06 08 1 2 3 4 5 6 8 10

200

80 10020 3003

03Qn [m3h]

02

50 60 80 100

40 50 60

VAG

115

N

P1VAG

125

N

VAG

120

N

VAG

240

NP2

VAG

350

N

= natural gas (ρ = 080 kgm3) = propane (ρ = 201 kgm3) = air (ρ = 129 kgm3)

The characteristic flow rate curves have been meas-ured with the specified flanges and a fitted strainer If two or more valves are combined the pressure loss of each additional valve drops by approx 5

5 3 Selection example for zero governor VAG NNatural gas Flow rate Qmax = 30 m3h Inlet pressure pu = 20 mbar Outlet pressure pd = 0 mbar (atmospheric pressure)The desired control ratio from high-fire to low-fire rate is RV = 101High fire ∆p = pu - pd max = 20 mbar Point P1Low fire Point P2 Qmin = 24 m3h at ∆p = 20 mbar RV = Qmax Qmin = 1231Point P1 and point P2 must be within the working range of a unit size We recommend that you select the smallest size to achieve the best control properties

metric imperial

Enter densityFlow rate Qn

Inlet pressure pu

Outlet pressure pd

Product RV

5 3 1 Calculate VAG N

Pressure loss ∆p

∆pmin

Flow rate

v

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 27

6 Selection6 1 Selection table for pressure regulator with solenoid valve VAD

Accessories right Accessories left

Type1) T R N F N K P Q Y W S2) G2) R2) L2) M20

cab

le g

land

Plug

with

soc

ket

Plug

with

out s

ocke

t

-25-50 -100 A B Scre

w p

lug

Pres

sure

test

poi

nt

DG

17V

C 3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

Scre

w p

lug

Pres

sure

test

poi

nt

DG

17V

C 3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

VAD 115

VAD 120

VAD 125

VAD 240

VAD 350

= standard = available1) The following nominal inlet fl ange diameters are also available size 1 with nominal diameter DN 10 size 2 with nominal diameters DN 25 DN 32 and DN 50 size 3 with nominal diameters DN 40 and DN 652) Position indicator and bypasspilot gas valve cannot be fi tted together on the same side3) Specify the test point for inlet pressure pu or outlet pressure pdHelp for selecting the pressure regulator VAD can be found on the ProFi DVD wwwkromschroedercom Products DVD Product fi nder ldquoProFirdquo

Order exampleVAD 240RNW-100A

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 28

Selection

6 2 Type code for VADCode DescriptionVAD Pressure regulator with solenoid valve1 ndash 3 SizeT T-product10 ndash 65 Nominal inlet and outlet diameterRNF

Rp internal threadNPT internal thread

ISO fl angeN Quick opening quick closingKPQYW

Mains voltage 24 V DCMains voltage 100 V AC 5060 HzMains voltage 120 V AC 5060 HzMains voltage 200 V AC 5060 HzMains voltage 230 V AC 5060 Hz

SG

Position indicator with visual indicatorPosition indicator for 24 V with visual indicator

RL

Viewed from the right (in the direction of fl ow)Viewed from the left (in the direction of fl ow)

-25-50-100

Outlet pressure pd 25 ndash 25 mbar20 ndash 50 mbar

35 ndash 100 mbarAB

Standard valve seatReduced valve seat

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 29

Selection

6 3 Selection table for airgas ratio control with solenoid valve VAG flow rate regulators VAH VRH

Type1) T R N F N K P Q Y W S2) G2) R2) L2) M20

cab

le g

land

Plug

with

soc

ket

Plug

with

out s

ocke

t

A B E K A N Scre

w p

lug

Pres

sure

test

poi

ntD

G 1

7VC

3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

Scre

w p

lug

Pres

sure

test

poi

ntD

G 1

7VC

3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

VAG 115 VAG 120 VAG 125 VAG 240 VAG 350

VAH 115 VAH 120 VAH 125 VAH 240 VAH 350

VRH 115 VRH 120 VRH 125 VRH 240 VRH 350

= standard = available1) The following nominal inlet fl ange diameters are also available size 1 with nominal diameter DN 10 size 2 with nominal di-

ameters DN 25 DN 32 and DN 50 size 3 with nominal diameters DN 40 and DN 652) Position indicator and bypasspilot gas valve cannot be fi tted together on the same side3) Specify the test point for inlet pressure pu or outlet pressure pdHelp for selecting the regulators can be found on the ProFi DVD wwwkromschroedercom Products DVD Product fi nder ldquoProFirdquo

Order exampleVAG 240RNWAE

Accessories right Accessories left

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 30

Selection

6 4 Type code for VAG VAH VRHCode DescriptionVAGVAHVRH

Airgas ratio control with solenoid valveFlow rate regulator with solenoid valve

Flow rate regulator1 ndash 3 SizeT T-product15 ndash 50 Nominal inlet and outlet diameterRNF

Rp internal threadNPT internal thread

ISO fl angeN1) Quick opening quick closingK1)

P1)

Q1)

Y1)

W1)

Mains voltage 24 V DCMains voltage 100 V AC 5060 HzMains voltage 120 V AC 5060 HzMains voltage 200 V AC 5060 HzMains voltage 230 V AC 5060 Hz

S1)

G1)Position indicator with visual indicator

Position indicator for 24 V with visual indicatorRL

Viewed from the right (in the direction of fl ow)Viewed from the left (in the direction of fl ow)

AB

Standard valve seatReduced valve seat

EKAN

Connection kit for air control pressure psaVAG VAH VRH compression fi tting

VAG plastic hose couplingVAG VAH VRH NPT 18 adapter

VAG zero governor1) Only available for VAG VAV VAH

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 31

6 5 Selection table for variable airgas ratio control with solenoid valve VAVAccessories right Accessories left

Type1) T R N F N K P Q Y W S2) G2) R2) L2) M20

cab

le g

land

Plug

with

soc

ket

Plug

with

out s

ocke

t

A B E K A Scre

w p

lug

Pres

sure

test

poi

ntD

G 1

7VC

3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

Scre

w p

lug

Pres

sure

test

poi

ntD

G 1

7VC

3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

VAV 115

VAV 120

VAV 125

VAV 240

VAV 350

= standard = available1) The following nominal inlet fl ange diameters are also available size 1 with nominal diameter DN 10 size 2 with nominal diameters DN 25 DN 32 and DN 50 size 3 with nominal diameters DN 40 and DN 652) Position indicator and bypasspilot gas valve cannot be fi tted together on the same side3) Specify the test point for inlet pressure pu or outlet pressure pdHelp for selecting the variable airgas ratio control VAV can be found on the ProFi DVD wwwkromschroedercom

Products DVD Product fi nder ldquoProFirdquo

Order exampleVAV 240RNWAK

Selection

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 32

Selection

6 6 Type code for VAVCode DescriptionVAV Variable airgas ratio control with solenoid valve1 ndash 3 SizeT T-product15 ndash 50 Nominal inlet and outlet diameterRNF

Rp internal threadNPT internal thread

ISO fl angeN Quick opening quick closingKPQYW

Mains voltage 24 V DCMains voltage 100 V AC 5060 HzMains voltage 120 V AC 5060 HzMains voltage 200 V AC 5060 HzMains voltage 230 V AC 5060 Hz

SG

Position indicator with visual indicatorPosition indicator for 24 V with visual indicator

RL

Viewed from the right (in the direction of fl ow)Viewed from the left (in the direction of fl ow)

AB

Standard valve seatReduced valve seat

EKA

Connection kit for air control pressure psa and combus-tion chamber control pressure psc

compression fi ttingplastic hose coupling

NPT 18 adapter

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 33

Selection

6 7 AccessoriesModularly configurable withndash Screw plugsndash Pressure test pointsndash Pressure switch DGVC for inlet

andor outlet pressurendash Tightness control TCndash Bypasspilot gas valve VBY 8 for

size 1ndash Bypasspilot gas valve VAS 1For further information see page 37 (Accessories)

Position indicator

Plug with socket

Plug

Screwplugs

Pressuretest points

Pressure switch DGC Tightness

control TC

Bypasspilot gas valve VBY 8 for size 1

Bypasspilot gas valve VAS 1

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 34

7 Project planning informationDo not store or install the unit in the open airThe inlet pressure pu and the outlet pressure pd can be meas-ured on both sides of the valve body To increase the control accuracy an external impulse line can be connected instead of the pressure test point pd

VAD

pu

pd

(psa)

VAGpd

pu

psa

psa

VAD measurement point for the gas outlet pressure pd on the regulator body A combustion chamber control line (psc) can be connected to connection psa for maintaining a constant burner capacityVAG additional measurement point for the air control pressure psa on the regulator body

VAV

psapsc

pu

pd

VAH VRH

pu

pd-

pdpsa-

psa

VAV measurement point for the outlet pressure pd on the regulator bodyVAH additional measurement points for the outlet pressure pd- and the air control pressure psapsa- on the regulator body

7 1 Installation

GFK

VAGVAH

GFKVAD

Sealing material and thread cuttings must not be allowed to get into the valve housing Install a filter upstream of every system

gt20 mmgt0 79

The unit must not be in contact with masonry Minimum clear-ance 20 mm (079 inches)Ensure that there is sufficient space for installation and ad-justment

le +100 degCle +212 degF

The solenoid body heats up during operation ndash depending on ambient temperature (max 60degC140degF) and intrinsic heating (approx 40degC104degF)

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 35

In the case of double solenoid valves the position of the con-nection box can only be changed by removing the actuator and reinstalling it offset by 90deg or 180deg

If more than three valVario controls are installed in line the controls must be supported

The seals in some gas compression fittings are approved for temperatures of up to 70degC (158degF) This temperature limit will not be exceeded if the flow through the pipe is at least 1 msup3h (3531 SCFH) of gas and the maximum ambient temperature is 50degC (122degF)

7 1 1 Installation position

pu ge 80 mbar(80 hPa32 WC)

VAD VAG VAH VRH VAV

In humid environments black solenoid actuator in the vertical upright position only

VAD VAG VAH VRH black solenoid actuator in the vertical upright position or tilted up to the horizontal not upside downVAG VAH horizontal position only if pu ge 80 mbar (32 WC))VAV installation in the vertical position only black solenoid actuator in the vertical upright positionTo ensure that the airgas ratio control VAG the flow rate regulator VAH VRH or the variable airgas ratio control VAV can react quickly when the load is changed the impulse line for the air control pressure psa and for VAV the impulse line for the combustion chamber control pressure psc should be kept as short as possible The tube internal diameter for the impulse line must always be ge 39 mm (015)

VAH VRHIt is not permitted to install a gas solenoid valve VAS down-stream of flow rate regulator VAH VRH and upstream of fine-adjusting valve VMV The VAS would no longer be able to perform its function as a second safety valve if installed in the above-mentioned position

M

VMV

VAH

VASVAS

pd-

psa-psa

VMV

VAH pd-

psa-psa

The measuring orifice in the air line for impulse lines psa and psa- must always be installed downstream of the air control valve

Project planning information gt Installation

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 36

VAVThe impulse line for the combustion chamber control pres-sure psc must be fitted so that no condensation can enter the pressure regulator but rather flows back into the combustion chamber

7 2 Setting the low-fire rate on VAG VAH VRH VAV

-10 +05-05

ndash

+1

-15

mbar

+15

06

1 152

3

N V

+ +ndash

+30 -15+15

ndash

-3

+5

mbar

-5

N

+

VAG VAH VRH VAV

If the burner operates at low-fire rate the gasair mixture can be changed using the parallel shift of the characteristic curve by turning the adjusting screw ldquoNrdquoAdjusting range at low fire VAG VAH VRH -5 to +5 mbar (-195 to +195 WC) VAV -15 to +15 mbar (-06 to +06 WC)

7 3 Setting the high-fire rate on VAVTo set the high-fire rate the transmission ratio is changed us-ing the adjusting screw ldquoVrdquo until the required flue gas values are achievedTransmission ratio V = pdpsa = 061 to 31The settings N and V can influence each other and must be repeated if necessary

+N+V

-V

-N

VAV

psa [mbar]

p d [m

bar]

7 3 1 CalculationWith no connection to the combustion chamber control pres-sure psc pd = V times psa + NWith connection to the combustion chamber control pressure psc (pd - psc) = V times (psa - psc) + N

Project planning information

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 37

pu pd

21579

4836

085310

189

142

8 Accessories8 1 Gas pressure switch DG VC for VAx VRHType Adjusting range [mbar]DG 17VC 2 to 17DG 40VC 5 to 40DG 110VC 30 to 110DG 300VC 100 to 300

Scope of delivery 1 times pressure switch for gas 2 times retaining screws 2 times sealing rings

8 2 Gas pressure switch DG VCT for VAx T VRH TType Adjusting range [WC]DG 17VCT 08 to 68DG 40VCT 2 to 16DG 110VCT 12 to 44DG 300VCT 40 to 120

Scope of delivery 1 times gas pressure switch with AWG 18 connection wires 2 times retaining screws 2 times sealing ringsMonitoring the inlet pressure pu the electrical plug of the pressure switch for gas points towards the inlet flangeMonitoring the outlet pressure pd the electrical plug of the pressure switch for gas points towards the outlet flange

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 38

A BC

D

FE

ACD

F

B

E

8 3 Bypass valvepilot gas valve VAS 18 3 1 VAS 1 attached to VADVAGVAHVAV 1Scope of delivery A 1 times bypasspilot gas valve VAS 1 B 4 times O-rings C 4 times double nuts D 4 times connection parts E 1 times mounting aidBypass valve VAS 1 F 2 times connection pipes if the bypass valve has a blind flange

at the outlet sidePilot gas valve VAS 1 F 1 times connection pipe 1 times sealing plug if the pilot gas valve

has a threaded flange at the outlet side

Accessories

8 3 2 VAS 1 attached to VADVAGVAHVAV 2 VADVAGVAHVAV 3Scope of delivery A 1 times bypasspilot gas valve VAS 1 B 4 times O-rings C 4 times spacer sleeves D 4 times connection parts E 1 times mounting aidBypass valve VAS 1 F 2 times connection pipes if the bypass valve has a blind flange

at the outlet sidePilot gas valve VAS 1 F 1 times connection pipe 1 times sealing plug if the pilot gas valve

has a threaded flange at the outlet side

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 39

2

3

456

810

20

30

405060

80100

∆p [m

bar]

005 01 02 03 05 08 1 2 3 4 51

3

2

Qn [m3h]

1

01

02

03

0405

08

003

002

6 8 10

005 01 02 03 05 08 1 2 3 4 5003 6 8 10

20

005 01 02 03 05 08 1 2 3 4 5003 6 8 10 20

30

∆p [i

nch

WC]

1

2

3

456

810

20

30

40

04

004

006

00801

02

03

0506

08

Qn [SCFH]10 40 60 100 200 3001 500 10002 3 4 5

120 306 8

21 3 4 5 6 7 8 910

8 3 3 Flow rate

The characteristic flow rate curves have been measured for bypass valve VAS 1 with connection pipe diameter 1 to 10 mm (004 to 04) and for the pilot gas valve with 10 mm (04) connection pipe

Bypass valve connection pipe diameter [mm]

Pilo

t gas

val

ve 1

0 m

m (0

4)

conn

ectio

n pi

pe d

iam

eter

Accessories gt Bypass valvepilot gas valve VAS 1

= natural gas (ρ = 080 kgm3) = propane (ρ = 201 kgm3) = air (ρ = 129 kgm3)

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 40

Accessories

8 4 Bypass valvepilot gas valve VBY 8 for VADVAGVAHVAV 1

B

C

AVBY 8

VAx 1

55

(217)40(157)

70 (276)

80(315)

Rp frac14(pilot gas valve)

For mounting on VAD VAG VAH VAV 1 and double solenoid valve VCD VCG VCH VCV 1

8 4 1 Scope of delivery VBY 8I as bypass valveA 1 times bypass valve VBY 8IB 2 times retaining screws with 4 times O-rings both retaining screws

have a bypass orificeC 1 times grease for o-rings

8 4 2 Scope of delivery VBY 8R as pilot gas valveA 1 times pilot gas valve VBY 8RB 2 times retaining screws with 5 x O-rings one retaining screw

has a bypass orifice (2 x O-rings) the other does not (3 x O-rings)

C 1 times grease for O-rings

8 4 3 SelectionType I R W Q K 6L -R -L E B D 05

VBY 8

Order exampleVBY 8RW6L-LED

8 4 4 Type codeCode DescriptionVBY Gas solenoid valve8 Nominal sizeIR

For internal gas pick-up as bypass valveFor external gas pick-up as pilot gas valve

KQW

Mains voltage 24 V DC Mains voltage 120 V AC 5060 HzMains voltage 230 V AC 5060 Hz

6L Electrical connection via plug and socket with LED-R-L

Attachment side of main valve right-hand sideAttachment side of main valve left-hand side

EB

Attached to the VAxEnclosed (separate packing unit)

05D

Nozzle diameter = 05 mm (002)Flow adjustment

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 41

2

01

02

03

05

081

3

456

810

20

30

405060

80100

∆p [m

bar]

1

3

201 02 03 05 1 2 3001 003 4

Qn [m3h]

02 03 05 1 2

01 02 05

002 006

002

002 006 1

0010006 005 01

001

0003

0006 2 3

VBY 8DVBY 805

∆p [i

nch

WC]

1

2

3

456

810

20

30

40

040506

08

1

Qn [SCFH]10 40 60 1005 2081 2 30402

01

02

03

004005006

008

Adjusting range

8 4 5 Flow rateVBY 8 D

+

-

The flow rate can be set by turning the flow rate restrictor (4 mm016 Allen screw) frac14 of a turn Flow rate 10 to 100

VBY 8 05The flow is routed through a 05 mm (002) nozzle and thus has a fixed characteristic flow rate curve Adjustment is not possible

8 4 6 Technical dataInlet pressure pu max 500 mbar (7 psig)Ambient temperature 0 to +60degC (32 to 140degF) no condensation permittedStorage temperature 0 to +40degC (32 to 104degF) no condensation permittedPower consumption 24 V = 8 W 120 V = 8 W 230 V = 95 WEnclosure IP 54

Accessories gt Bypass valvepilot gas valve VBY 8 for VADVAGVAHVAV 1

= natural gas (ρ = 080 kgm3) = propane (ρ = 201 kgm3) = air (ρ = 129 kgm3)

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 42

TC 116VB C

56(22)

49(193)

27(106)

A

A

VCx 1 VCx 2VCx 3

8 5 Tightness control TC 116Vfor VAx 1 ndash 3An adapter plate is required to attach the tightness control to the right- or left-hand side of the pressure regulator with gas solenoid valveScope of delivery A 1 times adapter plate B 2 times O-rings C 2 times retaining screwsFor attachment to left-hand side Order No 74922391 right-hand side Order No 74921995

8 6 Pressure test pointsTest points to check the inlet pressure pu and outlet pressure pdScope of delivery 1 x pressure test points with 1 x profiled sealing rings Order No 74923390

8 7 Cable gland setWhen wiring a double solenoid valve with pressure regula-tor VCx the connection boxes are to be connected using a cable gland setThe cable gland set can only be used if the connection boxes are at the same height and on the same side and if both valves are equipped either with or without a proof of closure switchVA 1 Order No 74921985 VA 2 Order No 74921986 VA 3 Order No 74921987

Accessories

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 43

A B

D

C

Accessories

8 9 Differential pressure orifice

Size PipeDN

Differential pressure orifi cewith outlet dia

1 15 17 mm 0671 20 25 mm 0981 25 30 mm 1182 40 46 mm 1813 50 58 mm 228

If pressure regulator VADVAGVAV 1 is retrofitted upstream of gas solenoid valve VAS 1 a DN 25 differential pressure orifice with outlet opening d = 30 mm (118) must be inserted at the outlet of the pressure regulatorIn the case of pressure regulator VAx 115 or VAx 120 the DN 25 differential pressure orifice must be ordered separately and retrofitted Order No 74922240

8 8 Seal set VA 1 ndash 3VA 1 Order No 74921988 VA 2 Order No 74921989 VA 3 Order No 74921990Scope of deliveryA 1 times double block seal B 2 times O-rings (flange) C 2 times O-rings (pressure switch) for pressure test pointscrew plug D 2 times sealing rings (flat sealing) and 2 times profiled sealing rings

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 44

BA

C

pd-

8 11 Attachment blockFor locked installation of pressure gauge and other acces-soriesScope of delivery A 1 times attachment block B 2 times self-tapping screws for installation C 2 times O-rings

Accessories

8 10 Retaining frameIn the event that a pressure regulator VAx is installed at a later point upstream of a gas solenoid valve VAS a measur-ing orifice VMO or a fine-adjusting valve VMV the retaining frame must be fitted at the inlet of the second device in order to fasten the differential pressure orifice at the regulator outlet Order the retaining frame separatelyRetaining frame for Size 1 Order No 74923029 Size 2 Order No 74923030 Size 3 Order No 74923031

8 12 Gas control lineFine-adjusting valve VMV can be installed on the flow rate regulator VAH for fine adjustment of the gas flow rateThe gas control line for gas outlet pressure pd- is available with 2 18 compression fittingsSize 1 Order No 74924458 Size 2 Order No 74924459

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 45

8 13 Measuring orifice VMOThe measuring orifice VMO is designed to reduce the gas and air flow rates and is installed downstream of the valVario control The measuring orifice is available with Rp internal thread (NPT internal thread) or flange to ISO 7005See wwwdocuthekcom Elster Kromschroumlder Krom-schroumlder LBE Products 03 Valves and butterfly valves valVario accessories Type of document Technical Informa-tion VMO

Accessories

8 14 Filter module VMFUsing the filter module VMF the gas flow upstream of the gas solenoid valve VAS and the airgas ratio control is cleaned The filter module is available with Rp internal thread (NPT internal thread) or flange to ISO 7005 and can also be supplied with fitted pressure switch as an optionSee wwwdocuthekcom Elster Kromschroumlder Krom-schroumlder LBE Products 03 Valves and butterfly valves valVario accessories Type of document Technical Informa-tion VMF

8 15 Fine-adjusting valve VMVThe flow rate is set using the fine-adjusting valve VMV The fine-adjusting valve is available with Rp internal thread (NPT internal thread) or flange to ISO 7005See wwwdocuthekcom Elster Kromschroumlder Krom-schroumlder LBE Products 03 Valves and butterfly valves valVario accessories Type of document Technical Infor-mation VMV

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 46

9 Technical dataGas types natural gas LPG (gaseous) biologically produced methane (max 01 -by-vol H2S) or clean air other gases on request The gas must be clean and dry in all temperature conditions and must not contain condensateCE and FM approved UL listed max inlet pressure pu 10 ndash 500 mbar (4 ndash 200 WC) FM approved (230 V AC 120 V AC 24 V DC) non opera-tional pressure 700 mbar (10 psig)ANSICSA approved (230 V AC 120 V AC 24 V DC) up to 350 mbar (5 psig)Opening time of the solenoid valve quick opening le 05 s Closing time quick closing lt 1 sMedium and ambient temperatures -20 to +60degC (-4 to +140degF) no condensation permittedStorage temperature -20 to +40degC (-4 to +104degF)Enclosure IP 65Valve housing aluminium valve seal NBRConnection flanges with internal thread Rp to ISO 7-1 NPT to ANSIASMESafety valve Class A to EN 161 Factory Mutual Research Class 7400 Process Control Valves (230 V AC 120 V AC 24 V DC) ANSI Z2121 and CSA 65 ANSI Z2118 and CSA 63Control class A to EN 88-1Control range up to 101

Mains voltage 230 V AC +10-15 5060 Hz 200 V AC +10-15 5060 Hz 120 V AC +10-15 5060 Hz 100 V AC +10-15 5060 Hz 24 V DC plusmn20Duty cycle 100Power factor of the solenoid coil cos φ = 09Power consumption

Type Voltage Power

VAx 1

24 V DC 25 W ndash100 V AC 25 W (26 VA)120 V AC 25 W (26 VA)200 V AC 25 W (26 VA)230 V AC 25 W (26 VA)

VAx 2 VAx 3

24 V DC 36 W ndash100 V AC 36 W (40 VA)120 V AC 40 W (44 VA)200 V AC 40 W (44 VA)230 V AC 40 W (44 VA)

VBY24 V DC 8 W ndash

120 V AC 8 W ndash230 V AC 95 W ndash

Cable gland M20 times 15Electrical connection cable with max 25 mm2 (AWG 12) or plug with socket to EN 175301-803

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 47

Position indicator contact rating

Type Voltage Min current(resistive load)

Max current(resistive load)

VAxS VCxS 12 ndash 250 V AC 5060 Hz 100 mA 3 AVAxG VCxG 12 ndash 30 V DC 2 mA 01 A

Position indicator switching frequency max 5 times per minute

Switching current [A]

Switching cyclescos φ = 1 cos φ = 06

01 500000 50000005 300000 250000

1 200000 1000003 100000 ndash

Limited to max 200000 cycles for heating systems

9 1 VADOutlet pressure pd VAD-25 25 ndash 25 mbar (1 ndash 10 WC) VAD-50 20 ndash 50 mbar (8 ndash 20 WC) VAD-100 35 ndash 100 mbar (14 ndash 40 WC)Combustion chamber control pressure psc (connection psa)

-20 to +20 mbar (-78 to +78 WC)

VAD

pu

pd

(psa)

9 2 VAGOutlet pressure pd 05 ndash 100 mbar (02 ndash 40 WC)Air control pressure psa 05 ndash 100 mbar (02 ndash 40 WC)

Adjusting range at low fire plusmn5 mbar (plusmn2 WC)Transmission ratio of gas to air 11The inlet pressure must always be higher than the air control pressure psa + pressure loss ∆p + 5 mbar (2 WC)

VAGpd

pu

psa

psa

VAGK 1 x 18 coupling for plastic hose (internal dia 39 mm (015) external dia 61 mm (024)) or VAGE 1 x 18 compression fitting for 6 times 1 tube or VAGA 1 x NPT 18 adapter or VAGN zero governor with breathing orifice

9 3 VAH VRHAir control pressure psa 06 ndash 100 mbar (024 ndash 40 WC) Differential air pressure ∆psa (psa - psa-) 06 ndash 50 mbar (024 ndash 197 WC) Differential gas pressure ∆pd (pd - pd-) 06 ndash 50 mbar (024 ndash 197 WC)Transmission ratio of gas to air 11The inlet pressure must always be higher than the differen-tial air pressure ∆psa + pressure loss ∆p + max gas pres-sure on burner + 5 mbar (2 WC)Adjusting range at low fire plusmn5 mbar (plusmn2 WC)

Technical data

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 48

VAHVRH

pd-

pu

psa-

psa

Connection of the air control pressure psaVAHE VRHE 3 x 18 compression fitting for 6 times 1 tube or VAHA VRHA 3 x NPT 18 adapter

9 4 VAVOutlet pressure pd 05 ndash 30 mbar (02 ndash 117 WC)Air control pressure psa 04 ndash 30 mbar (015 ndash 117 WC)Combustion chamber control pressure psc

-20 to +20 mbar (-78 to +78 WC)Min control pressure differential psa - psc 04 mbar (015 WC)Min pressure differential pd - psc 05 mbar (02 WC)Adjusting range at low fire plusmn15 mbar (plusmn06 WC)Transmission ratio of gas to air 061 to 31The inlet pressure pu must always be higher than the air control pressure psa times transmission ratio V + pressure loss ∆p + 15 mbar (06 WC)

pu

pd psapsc

VAV

VAVK 2 x plastic hose couplings (internal dia 39 mm (015) external dia 61 mm (024)) or VAVE 2 x 18 compression fitting for 6 times 1 tube or VAVA 2 x NPT 18 adapter

Technical data

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 49

9 5 Safety-specific characteristic values for VAx 1 ndash 3For SILSuitable for Safety Integrity Level SIL 1 2 3

Diagnostic coverage DC 0

Type of subsystem Type A to EN 61508-2 74312

Operating mode High demand mode pursu-ant to EN 61508-4 3512

For PLSuitable for Performance Level PL a b c d e

Category B 1 2 3 4Common cause failure CCF gt 65Application of essential safety requirements Satisfied

Application of tried-and-tested safety requirements Satisfied

For SIL and PL

B10d value

Operating cyclesVAD VAG VAV VAH 1 10094360VAD VAG VAV VAH 2 8229021VAD VAG VAV VAH 3 6363683

Hardware fault tolerance (1 valve) HFT 0

Hardware fault tolerance (2 valves) HFT 1

Safe failure fraction SFF gt 90Fraction of undetected com-mon cause failures β ge 2

Max service life under operating conditions10 years after date of production plus max 12 year in stor-age prior to first use or once the given number of operating cycles has been reached depending on which is achieved firstThe devices are suitable for single-channel systems (HFT = 0) up to SIL 2PL d and up to SIL 3PL e when two re-dundant valves are installed in a double-channel architecture (HFT = 1) provided that the complete system complies with the requirements of EN 61508ISO 13849

For a glossary of terms see page 53 (Glossary)

Technical data

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 50

nop 1hnop 1a

sB10d

T10d aPFHD (1 VAx) 1h

PFHD (2 VAx) 1h

PFDavg (1 VAx)

PFDavg (2 VAx)

Technical data gt Safety-specific characteristic values for VAx 1 ndash 3

9 5 1 Determining the PFHD value the λD value and the MTTFd value

PFHD = λD = x nop= 1MTTFd

01B10d

PFDavg = x λD x 24 x 365 x T10d 12

Type

Cycle time

suitable for

suitable for

PFHD = Probability of dangerous failure (HDM = high de-mand mode) [1hour]PFDavg = Average probability of dangerous failure on de-mand (LDM = low demand mode)λD = Mean dangerous failure rate [1hour]MTTFd = Mean time to dangerous failure [hours]nop = Demand rate (mean number of annual operations) [1hour]

9 5 2 Calculating the PFHD and PFDavg

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 51

VAD VAG VAH VAV

H1

Rp frac14(NPT frac14)

H2

E

LF

F

H4

H3

B

VAxS VAxF

L2G

G

Technical data

9 6 Dimensions

Type

Connec-tion Dimensions

WeightRpNPT DN

L L2 E F G H1 H2 H3 H4 Bmm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch kg lbs

VAx 115 12 15 75 29 ndash ndash 75 29 15 06 ndash ndash 143 56 82 32 161 63 117 46 97 38 18 40VAH 115 12 15 75 29 ndash ndash 75 29 15 06 ndash ndash 143 56 100 39 161 63 135 53 97 38 2 44VAx 120 34 20 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 82 33 161 63 117 46 97 38 19 42VAH 120 34 20 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 100 39 161 63 135 53 97 38 21 46VAx 125 1 25 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 82 33 161 63 117 46 97 38 19 42VAH 125 1 25 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 100 39 161 63 135 53 97 38 21 46VAx 240 112 40 128 50 200 79 85 33 29 11 66 26 170 67 112 44 191 75 162 64 125 49 44 97VAH 240 112 40 128 50 200 79 85 33 29 11 66 26 170 67 132 52 191 75 182 72 125 49 47 104VAx 350 2 50 155 61 230 91 85 33 36 14 74 29 180 70 135 53 201 79 196 77 160 63 61 134VAH 350 2 50 155 61 230 91 85 33 36 14 74 29 180 70 156 61 201 79 217 85 160 63 64 141

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 52

10 Converting unitssee wwwadlatusorg

11 Maintenance cyclesAt least once per annum at least twice per annum for biologi-cally produced methaneIf the flow rate drops clean the strainer

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 53

12 Glossary12 1 Diagnostic coverage DCMeasure of the effectiveness of diagnostics which may be determined as the ratio between the failure rate of detected dangerous failures and the failure rate of total dangerous failuresNOTE Diagnostic coverage can exist for the whole or parts of a safety-related system For example diagnostic cover-age could exist for sensors andor logic system andor final elements Unit see EN ISO 13849-12008

12 2 Mode of operationHigh demand mode or continuous modeOperating mode where the frequency of demands for opera-tion made on a safety-related system is greater than one per year or greater than twice the proof-test frequencysee EN 61508-42008

12 3 CategoryClassification of the safety-related parts of a control system in respect of their resistance to faults and their subsequent behaviour in the fault condition and which is achieved by the structural arrangement of the parts fault detection andor by their reliability see EN ISO 13849-12008

12 4 Common cause failure CCFFailures of different items resulting from a single event where these failures are not consequences of each othersee EN ISO 13849-12008

12 5 Fraction of undetected common cause failures β Fraction of undetected failures of redundant components due to a single event whereby these failures are not based on mutual causesNOTE β is expressed as a fraction in the equations and as a percentage elsewheresee EN 61508-62010

12 6 B10d valueMean number of cycles until 10 of the components fail dan-gerouslysee EN ISO 13849-12008

12 7 T10d valueMean time until 10 of the components fail dangerouslysee EN ISO 13849-12008

12 8 Hardware fault tolerance HFTA hardware fault tolerance of N means that N + 1 is the mini-mum number of faults that could cause a loss of the safety functionsee IEC 61508-22010

12 9 Mean dangerous failure rate λD Mean rate of dangerous failures during operation time (T10d) Unit 1hsee EN ISO 13849-12008

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 54

12 10 Safe failure fraction SFFFraction of safe failures related to all failures which are as-sumed to appearsee EN 13611A22011

12 11 Probability of dangerous failure PFHD Value describing the likelihood of dangerous failure per hour of a component for high demand mode or continuous mode Unit 1hsee EN 13611A22011

12 12 Mean time to dangerous failure MTTFd Expectation of the mean time to dangerous failuresee EN ISO 13849-12008

12 13 Demand rate nop Mean number of annual operationssee EN ISO 13849-12008

12 14 Average probability of dangerous failure on demand PFDavg (LDM = 1 ndash 10 switching cyclesyear)Average probability of a dangerous failure of the safety function on demand (LDM = low demand mode)see EN 61508-6

Glossary

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415

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Remarks

(Adobe Reader 7 or higher required) wwwadobecom

Elster GmbH Postfach 2809 middot 49018 Osnabruumlck Strotheweg 1 middot 49504 Lotte (Buumlren) GermanyT +49 541 1214-0 F +49 541 1214-370 infokromschroedercomwwwkromschroedercom

The current addresses of our international agents are available on the Internetwwwkromschroederdeindexphpid=718ampL=1

We reserve the right to make technical modifications in the interests of progressCopyright copy 2015 Elster GmbH All rights reserved

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0530

  • Pressure regulators with solenoid valve VAD VAG VAV VAH
  • Flow rate regulator VRH
  • Pressure regulators with double solenoid valve VCD VCG VCV VCH
  • Contents
  • 1 Application
    • 11 Examples of application
      • 111 Constant pressure control
      • 112 Constant pressure control with two gas solenoid valves
      • 113 Constant pressure control with max pressure switch
      • 114 Constant pressure control with non-controlled pilot gas outlet
      • 115 Modulating control
      • 116 Modulating control with two gas solenoid valves
      • 117 Modulating control with two gas solenoid valves and inlet pressure switch
      • 118 HighLow control
      • 119 Zero pressure control
      • 1110 Staged flow rate control
      • 1111 Continuous or staged flow rate control
      • 1112 Modulating control with variable airgas ratio control with gas solenoid valve
      • 1113 Modulating control in residential heat generation
          • 2 Certification
          • 3 Function
            • 31 VAD VAG VAH VRH VAV
              • 311 Pressure regulator for gas VAD
              • 312 Airgas ratio control VAG
              • 313 Flow rate regulators VAH VRH
              • 314 Variable airgas ratio control VAV
              • 315 Pressure regulator with gas solenoid valve VAxS position indicator with visual indicator
                • 32 Animation
                • 33 Connection diagram
                  • 331 VAx with M20 cable gland
                  • 332 VAx with plug
                  • 333 VAS with VADVAGVAHVAV with M20 cable gland
                  • 334 VAS with VADVAGVAHVAV with plug
                      • 4 Replacement possibilities for MODULINE pressure regulators with gas solenoid valve
                        • 41 GVS GVI GVIB GVR and GVRH are to be replaced by VAD VAG VAG+VAS VAH and VAV
                          • 5 Flow rate
                            • 51 Selection example for VAD
                              • 511 Calculate VAD
                                • 52 Selection example for VAG VAH VRH VAV
                                  • 521 CalculateVAG VxHVAV
                                    • 53 Selection example for zero governor VAGN
                                      • 531 Calculate VAGN
                                          • 6 Selection
                                            • 61 Selection table for pressure regulator with solenoid valve VAD
                                            • 62 Type code for VAD
                                            • 63 Selection table for airgas ratio control with solenoid valve VAG flow rate regulators VAH VRH
                                            • 64 Type code for VAG VAH VRH
                                            • 65 Selection table for variable airgas ratio control with solenoid valve VAV
                                            • 66 Type code for VAV
                                            • 67 Accessories
                                              • 7 Project planning information
                                                • 71 Installation
                                                  • 711 Installation position
                                                    • 72 Setting the low-fire rate on VAG VAH VRH VAV
                                                    • 73 Setting the high-fire rate on VAV
                                                      • 731 Calculation
                                                          • 8 Accessories
                                                            • 81 Gas pressure switch DGVC for VAx VRH
                                                            • 82 Gas pressure switch DGVCT for VAxT VRHT
                                                            • 83 Bypass valvepilot gas valve VAS 1
                                                              • 831 VAS 1 attached to VADVAGVAHVAV 1
                                                              • 832 VAS 1 attached to VADVAGVAHVAV 2 VADVAGVAHVAV 3
                                                              • 833 Flow rate
                                                                • 84 Bypass valvepilot gas valve VBY 8 for VADVAGVAHVAV 1
                                                                  • 841 Scope of delivery VBY 8I as bypass valve
                                                                  • 842 Scope of delivery VBY 8R as pilot gas valve
                                                                  • 843 Selection
                                                                  • 844 Type code
                                                                  • 845 Flow rate
                                                                  • 846 Technical data
                                                                    • 85 Tightness control TC 116V
                                                                    • 86 Pressure test points
                                                                    • 87 Cable gland set
                                                                    • 88 Seal set VA 1thinspndashthinsp3
                                                                    • 89 Differential pressure orifice
                                                                    • 810 Retaining frame
                                                                    • 811 Attachment block
                                                                    • 812 Gas control line
                                                                    • 813 Measuring orifice VMO
                                                                    • 814 Filter module VMF
                                                                    • 815 Fine-adjusting valve VMV
                                                                      • 9 Technical data
                                                                        • 91 VAD
                                                                        • 92 VAG
                                                                        • 93 VAH VRH
                                                                        • 94 VAV
                                                                        • 95 Safety-specific characteristic values for VAx 1thinspndashthinsp3
                                                                          • 951 Determining the PFHD value the λD value and the MTTFd value
                                                                          • 952 Calculating the PFHD and PFDavg
                                                                            • 96 Dimensions
                                                                              • 10 Converting units
                                                                              • 11 Maintenance cycles
                                                                              • 12 Glossary
                                                                                • 121 Diagnostic coverage DC
                                                                                • 122 Mode of operation
                                                                                • 123 Category
                                                                                • 124 Common cause failure CCF
                                                                                • 125 Fraction of undetected common cause failures β
                                                                                • 126 B10d value
                                                                                • 127 T10d value
                                                                                • 128 Hardware fault tolerance HFT
                                                                                • 129 Mean dangerous failure rate λD
                                                                                • 1210 Safe failure fraction SFF
                                                                                • 1211 Probability of dangerous failure PFHD
                                                                                • 1212 Mean time to dangerous failure MTTFd
                                                                                • 1213 Demand rate nop
                                                                                • 1214 Average probability of dangerous failure on demand PFDavg
                                                                                  • Feedback
                                                                                  • Contact
                                                                                      1. naechste_Seite 24
                                                                                      2. naechste Seite 18
                                                                                      3. naechste Seite 6
                                                                                      4. naechste Seite 16
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                                                                                      6. naechste Seite 25
                                                                                      7. naechste_Seite 11
                                                                                      8. naechste_Seite 17
                                                                                      9. fbArbeitspunkt_Min Ja
                                                                                      10. fbArbeitspunkt Ja
                                                                                      11. ftProgramm Standard-Programm
                                                                                      12. fz_kv
                                                                                      13. fz_pe 80
                                                                                      14. fz_pG 60
                                                                                      15. fzDelta_p_Soll 20
                                                                                      16. ftEinheit_Druck mbar
                                                                                      17. fatTyp [115]
                                                                                      18. fbArbeitspunkt_Min_2 Ja
                                                                                      19. fbArbeitspunkt_2 Ja
                                                                                      20. ftRegler_Typ VAG
                                                                                      21. ftProgramm_2 Standard-Programm
                                                                                      22. fz_kv_2
                                                                                      23. fatMedium [08]
                                                                                      24. fzDichte 08
                                                                                      25. ftEinheit_Dichte kgm3
                                                                                      26. fzV_Norm 30
                                                                                      27. ftEinheit_Volstrom m3h
                                                                                      28. fz_pe_2 80
                                                                                      29. fz_pG_2 60
                                                                                      30. fzDelta_p_Soll_2 20
                                                                                      31. ftEinheit_Druck2 [mbar]
                                                                                      32. ftEinheit_Geschw [ms]
                                                                                      33. fatTyp_2 [10954451150103322]
                                                                                      34. fbArbeitspunkt_Min_3 Ja
                                                                                      35. fbArbeitspunkt_3 Ja
                                                                                      36. ftProgramm_3 Standard-Programm
                                                                                      37. fz_kv_3
                                                                                      38. fz_pe_3 20
                                                                                      39. fz_pG_3 0
                                                                                      40. fzDelta_p_Soll_3 20
                                                                                      41. fatTyp_3 [123]
                                                                                      42. fatSchaltleistung [6363683]
                                                                                      43. fz_nop_Stunde 1
                                                                                      44. fz_nop_Jahr 8760
                                                                                      45. fzZyklus 3600
                                                                                      46. fzB10d 6363683
                                                                                      47. fzT10d 10
                                                                                      48. fzPFHd_1V 15714170551864384e-8
                                                                                      49. fzPFDavg_1V
                                                                                      50. ftGeeignet_1V PL d SIL 2
                                                                                      51. fzPFHd_2V 33505832253532625e-10
                                                                                      52. fzPFDavg_2V
                                                                                      53. ftGeeignet_2V PL e SIL 3
                                                                                      54. ftUebersicht Off
                                                                                      55. ftVerstaendlichkeit Off
                                                                                      56. ftFehlende_Info
                                                                                      57. ftUmfang Off
                                                                                      58. ftVerwendung_1 Off
                                                                                      59. ftVerwendung_2 Off
                                                                                      60. ftVerwendung_3 Off
                                                                                      61. ftVerwendung_4 Off
                                                                                      62. ftNavigation Off
                                                                                      63. ftTaetigkeitsbereich Off
                                                                                      64. ftBemerkung
                                                                                      65. Michael Rehkamp Elster Kromschroumlder>btnSenden
Page 3: VAD, VAG, VAV, VAH, VRH, VCD, VCG, VCV, VCH · PDF fileVAD, VAG, VAH, VAV, VRH, VCD, VCG, VCV, VCH · Edition 04.15 6 VAD VAD VAS 1 .1 Examples of application 1 .1 .1 Constant pressure

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 3

8 Accessories 3781 Gas pressure switch DGVC for VAx VRH 3782 Gas pressure switch DGVCT for VAxT VRHT 3783 Bypass valvepilot gas valve VAS 1 38831 VAS 1 attached to VADVAGVAHVAV 1 38832 VAS 1 attached to VADVAGVAHVAV 2 VADVAGVAHVAV 3 38833 Flow rate 39

84 Bypass valvepilot gas valve VBY 8 for VADVAGVAHVAV 1 40

841 Scope of delivery VBY 8I as bypass valve 40842 Scope of delivery VBY 8R as pilot gas valve 40843 Selection 40844 Type code 40845 Flow rate 41846 Technical data 41

85 Tightness control TC 116V 4286 Pressure test points 4287 Cable gland set 4288 Seal set VA 1 ndash 3 4389 Differential pressure orifice 43810 Retaining frame 44811 Attachment block 44812 Gas control line 44813 Measuring orifice VMO 45814 Filter module VMF 45815 Fine-adjusting valve VMV 45

9 Technical data 4691 VAD 4792 VAG 4793 VAH VRH 4794 VAV 4895 Safety-specific characteristic values for VAx 1 ndash 3 49

951 Determining the PFHD value the λD value and the MTTFd value 50

952 Calculating the PFHD and PFDavg 5096 Dimensions 51

10 Converting units 5211 Maintenance cycles 5212 Glossary 53121 Diagnostic coverage DC 53122 Mode of operation 53123 Category 53124 Common cause failure CCF 53125 Fraction of undetected common cause failures β 53126 B10d value 53127 T10d value 53128 Hardware fault tolerance HFT 53129 Mean dangerous failure rate λD 531210 Safe failure fraction SFF 541211 Probability of dangerous failure PFHD 541212 Mean time to dangerous failure MTTFd 541213 Demand rate nop 541214 Average probability of dangerous failure on demand PFDavg 54

Feedback 55Contact 55

Contents

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 4

VAD VAG VAH VAV VRH

1 ApplicationRegulators with solenoid valves are designed for shut-off and thanks to the servo technology for precise control of the gas supply to gas burners and gas appliances They are used in gas control and safety systems in all sectors of the iron steel glass and ceramics industries as well as in residential or commercial heat generation such as the packaging paper and foodstuffs industries

VADConstant pressure governor Class A with high control accu-racy for excess air burners atmospheric burners or single-stage forced draught burners Pressure preset via setpoint spring In the case of fluctuating furnace or kiln pressures the furnace chamber pressure may also be connected for maintaining a constant burner capacity

VAGAirgas ratio control Class A for maintaining a constant airgas pressure ratio for modulating-controlled burners or with VAS 1 bypass valve for stage-controlled burners Pressure preset by the air control line

The VAGN can also be used as a zero governor for gas engines

VAH VRHFlow rate regulators VAH and VRH are used to maintain a constant gasair ratio for modulating-controlled and stage-controlled burners The gas flow rate is controlled proportio-nally to the air flow rateIn addition flow rate regulator VAH is designed as a gas solenoid valve and shuts off the gas or air supply safely

VAVVariable airgas ratio control Class A for maintaining a con-stant gasair pressure ratio for modulating-controlled burners Pressure preset by the air control line The ratio of gas pressure to air pressure remains constant It can be set from 061 to 31 Pressure fluctuations in the combustion chamber can be compensated via the combustion chamber control pressure

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 5

Application

Pressure regulator on excess air burners in the ceramics in-dustry

Airgas ratio control on melting furnace for ensuring stoichio-metric combustion over the entire capacity range

Aluminium age-hardening furnace with airgas ratio controls for air deficiency cut-out

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 6

VAD

VADVAS

1 1 Examples of application1 1 1 Constant pressure controlThe pressure regulator with gas solenoid valve VAD maintains the set gas outlet pressure pd constant when subject to differing flow rates If a second gas so-lenoid valve is used upstream of the VAD this complies with the requirements of EN 746-2 for two Class A gas solenoid valves connected in series

1 1 2 Constant pressure control with two gas solenoid valvesThe pressure regulator with gas solenoid valve VAD maintains the set gas outlet pressure pd constant when subject to differing flow rates

Application

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 7

VAD

DGCmin DGCmax

VASPZL PZH

DGCmin DGCmax

VADVAS

VAS

PZL PZH

1 1 3 Constant pressure control with max pressure switchIn this example the minimum inlet pres-sure pu and the maximum outlet pres-sure pd are monitored with the pressure switches DGC The simple attachment of the pressure switch module makes installation easier

1 1 4 Constant pressure control with non-controlled pilot gas outletIn this application the pilot burner is supplied with a high inlet pressure via the pilot gas outlet The simple attach-ment of the bypass valve module makes installation easier The minimum inlet pressure pu and the maximum outlet pressure pd are monitored with the pres-sure switches DGC

Application gt Examples of application

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 8

psa

psa

VAG

MIC + BVA

psa

psaM

IC + BVA

VASVAG

1 1 5 Modulating controlThe gas outlet pressure pd is con trolled via the airgas ratio control with gas so-lenoid valve VAG The gas outlet pres-sure pd follows the changing air control pressure psa The ratio of gas pressure to air pressure remains constant The VAG is suitable for a control range up to 101If a second solenoid valve is used up-stream of the VAG this complies with the requirements of EN 746-2 for two Class A valves connected in series

1 1 6 Modulating control with two gas solenoid valvesThe gas outlet pressure pd is con trolled via the airgas ratio control with gas so-lenoid valve VAG The gas outlet pres-sure pd follows the changing air control pressure psa The ratio of gas pressure to air pressure remains constant The VAG is suitable for a control range up to 101The gas line is two Class A shut-off valves connected in series in accordance with the requirements of EN 746-2

Application gt Examples of application

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 9

DGCmin

PZL

psa

psa

M

IC + BVA

VAS

VAG

psa

DGCmin

PZL

psa

M

IC 40 + BVA

VAS

VAG

VAS 1

1 1 7 Modulating control with two gas solenoid valves and inlet pressure switchIn this case the minimum inlet pressure pu is monitored by the pressure switch DGC The simple attachment of the pressure switch module makes instal-lation easier

1 1 8 HighLow controlAt high fire the gas outlet pressure pd follows the air control pressure psa The ratio of gas pressure to air pressure re-mains constant Low fire is determined via the bypass valve VAS 1 Here as well the simple attachment of the bypass valve module makes installation easier

Application gt Examples of application

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 10

Venturi

DGCmin

PZL

M

IC + BVA

VASVAGN

1 1 9 Zero pressure controlIn this application the control air pres-sure is the atmospheric air pressure The air flow rate generates a negative pressure in the gas pipe via the Venturi This negative pressure is compensated by the airgas ratio control with gas solenoid valve VAGN The greater the negative pressure the greater the gas flow rate

Application gt Examples of application

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 11

BVHM + MB7L

VMV

ECOMAX

VASN

BCU BZA

Prozess SteuerungProcess Control (PCC)

AKT

psa-

psa

pd-

VAH

1 1 10 Staged flow rate controlThis application shows the VAH on a self recuperative burnerThe pressure loss in the recuperator de-pends on the furnace or kiln temperature When the furnace or kiln temperature is increased (at a constant air supply pres-sure) the flow rate drops This change in the air flow rate is measured by the orifice and the VAH changes the gas volume accordinglyThe air index (lambda) can be set using the fine-adjusting valve VMV

Application gt Examples of application

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 12

M

IC + BVA

VMV

VMO

VAH

VAS

psa-psa

pd-

psa

psc

DGCmin

PZL

psa

psc

M

IC + BVA

VAS VAV

1 1 11 Continuous or staged flow rate controlThis application shows flow rate control for a radiant tube burner system with plug-in recuperator for air preheatingThere are temperature-dependent air pressure losses in the recuperator The ratio of gas pressure to air pressure does not remain constant The fluctuating air flow rate is measured at the measuring orifice VMO and the VAH controls the gas flow rate proportionallyThe air index (lambda) can be set using the fine-adjusting valve VMV

Application gt Examples of application

1 1 12 Modulating control with variable airgas ratio control with gas solenoid valveThe ratio of gas pressure to air pressure can be adjusted infinitely between 061 and 31 Pressure fluctuations in the com-bustion chamber can be compensated via the combustion chamber control pressure psc see page 15 (Function)

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 13

DGCmin

PZL

psa

psc

VAS VAV

1 1 13 Modulating control in residential heat generationThis application shows the variable airgas ratio control with solenoid valve VAV fitted to a modulating-controlled forced draught burnerThe combustion air volume is set via a butterfly valve for air or by adjusting the fan speed

Application gt Examples of application

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 14

2 CertificationCertificates ndash see Docuthek

VAD VAG VAV VAH certified to SIL and PL

For systems up to SIL 3 pursuant to EN 61508 and PL e pursu-ant to ISO 13849

VAD VAG VAV VAHEU certified pursuant to

ndash Gas Appliances Directive (2009142EC) in conjunction with EN 13611 EN 161 EN 88-1 EN 126 and EN 1854

Meets the requirements of thendash Low Voltage Directive (200695EC)ndash EMC Directive (2004108EC)

VAD VAG VAV VAH FM approved

Factory Mutual Research Class 7400 Process Control Valves Designed for applications pursuant to NFPA 85 and NFPA 86 www approvalguide com

VAD VAG ANSICSA approved

American National Standards InstituteCanadian Standards Association ndash ANSI Z21 21CSA 6 5 ANSI Z21 18 and CSA 6 3

wwwcsagrouporg ndash Class number 3371-83 (natural gas LPG) 3371-03 (natural gas propane)

VAD VAG VAV UL listed

Underwriters Laboratories ndash UL 429 ldquoElectrically operated valvesrdquo wwwulcom Tools (at the bottom of the page) Online Certifications Directory

VAD VAG VAV AGA approved

AGA

Australian Gas Association Approval No 5319 httpwww aga asn auproduct_directory

Eurasian Customs Union

The product VAD VAG VAV VAH VCD VCG VCV VCH meets the technical specifications of the Eurasian Customs Union (the Russian Federation Belarus Kazakhstan)

Approval does not apply for 100 V AC and 200 V AC

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 15

3 Function3 1 VAD VAG VAH VRH VAVThe regulator is closed when it is disconnected from the power supplyOpening connect the system to the electrical power supply (alternating voltage will be rectified) The blue LED lights up The coilrsquos magnetic field pulls the armature upwards and clears the supply nozzle for the gas inlet pressure pu The gas passes through the internal impulse tube to the adjustment diaphragm and then pushes the valve disc open The outlet pressure is applied to the servo diaphragm via the internal feedback

The servo regulator then maintains a set constant outlet pres-sure pd

3 1 1 Pressure regulator for gas VADThe nominal outlet pressure pd is defined by the control spring

Servoregulator

Valve

Armature

Valve disc

Adjustmentdiaphragm

Servodiaphragm

Internalfeedback

Controlspring

Solenoid coil

Supplynozzle

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 16

3 1 2 Airgas ratio control VAGThe airgas ratio control VAG controls the outlet pressure pd depending on the variable air control pressure psaThe ratio of gas pressure to air pressure remains constant 11 The VAG is suitable for a control range up to 101If the burner operates at low-fire rate the gasair mixture can be changed by adjusting the zero point spring ldquoNrdquo

Function

psa

pd

Zero point setting N zero point spring

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 17

Function

3 1 3 Flow rate regulators VAH VRHThe flow rate regulators VAH VRH control the gas flow rate depending on the variable air flow rate The ratio of gas flow rate to air flow rate remains constant If the burner operates at low-fire rate the gasair mixture can be changed by adjusting the zero point spring ldquoNrdquoIn addition flow rate regulator VAH is designed as a gas solenoid valve and shuts off the gas or air supply safely

psa

psa-

pd-

pdInternal feedback

Zero point setting N zero point spring

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 18

3 1 4 Variable airgas ratio control VAVThe servo regulator maintains a set constant outlet pressure pd The variable airgas ratio control VAV controls the outlet pressure pd depending on the variable air control pressure psa The ratio of gas pressure to air pressure remains constantThe settings N and V can be changed and read off from both sides of the unit using the adjusting screwsThe ratio of gas pressure to air pressure at low-fire rate can be changed by adjusting the zero point setting N By turning the adjusting screw ldquoNrdquo the force of the zero point spring and thus the zero point is changed by plusmn 15 mbar (06 WC) see page 34 (Project planning information)The high-fire rate is set by turning the adjusting screw ldquoVrdquo until the required flue gas values are achieved see page 34 (Project planning information) The ratio of gas pressure to air pressure can be set from 061 to 31The settings N and V influence each other and the adjustment process must be repeated if necessaryThe outlet pressure pd is applied to the servo diaphragm via the internal feedback The combustion chamber control pres-sure psc is transmitted to the space under the air and servo diaphragms via an impulse lineThe pressure differential psa - psc is achieved on the air diaphragm and the pressure differential pd - psc on the servo diaphragm This ensures that pressure fluctuations in the combustion cham-ber can be compensated The flue gas values remain constant in the case of fluctuations in the combustion chamber pressure (pd - psc) = (psa - psc) times V + N

Function

pdpsc

psa

Air diaphragm

Transmission ratio V

Zero point setting N zero point spring

Internalfeedback

Adjustment diaphragm

Servo diaphragm

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 19

1 COM

2 NO

3 NC

3 1 5 Pressure regulator with gas solenoid valve VAx S position indicator with visual indicatorOpening when the pressure regulator is opened the posi-tion indicator switches The visual indicator is activated The ldquoopenrdquo signal is marked in red The double valve seat opens to release the volume of gasClosing the pressure regulator VAx is disconnected from the voltage supply and the closing spring presses the double valve disc on to the valve seat The position indicator is actuated The visual indicator is white for ldquoclosedrdquoThe actuator cannot be rotated on a pressure regulator with a position indicator and a visual indicatorNOTE NFPA 86 ndash the following must be taken into account as soon as the capacity of the pilot or main burner exceeds 117 kW (400000 BTUh) safety shut-off valve VASS must be fitted with a proof of closure overtravel switch with a visual position indicator and the burner-side pressure regulator with gas solenoid valve VAxS must also be fitted with a position indicator with visual indicator The closed position can be verified using the proof of closure switch of the gas solenoid valve VASS

Function

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 20

3 2 AnimationThe interactive animation shows the function of the valVario controls VADVAGVAHVAVClick on the picture The animation can be controlled using the control bar at the bottom of the window (as on a DVD player) To play the animation you will need Adobe Reader 7 or a newer version If you do not have Adobe Reader on your system you can download it from the Internet

Go to wwwadobecom click on ldquoAdobe Readerrdquo at the bottom of the page and follow the instructionsIf the animation does not start to play you can download it from the document library (wwwdocuthekcom) as an inde-pendent application

Function

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 21

3 3 Connection diagramWiring to EN 60204-1Connection diagram for VAxS with position indicator ndash see page 19 (Pressure regulator with gas solenoid valve VAxS position indicator with visual indicator)

3 3 1 VAx with M20 cable gland

L1 (+)

N (ndash)

3 3 2 VAx with plug

1 = N (-)

2 = L1 (+)

3 3 3 VAS with VADVAGVAHVAV with M20 cable glandL1V1 (+)

N (-)

L1V2 (+)

3 3 4 VAS with VADVAGVAHVAV with plug2 = L1V1 (+)

1 = N (-)

3 = L1V2 (+)

Function

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 22

4 Replacement possibilities for MODULINE pressure regulators with gas solenoid valve4 1 GVS GVI GVIB GVR and GVRH are to be replaced by VAD VAG VAG+VAS VAH and VAV

Type TypeGVS Pressure regulator with gas solenoid valve Pressure regulator with gas solenoid valve VADGVI Airgas ratio control with gas solenoid valve Airgas ratio control with gas solenoid valve VAG

GVIB Airgas ratio control with gas solenoid valve and bypass valve

Airgas ratio control with gas solenoid valve and bypass valve VAG+VAS

GVRH Flow rate regulator with gas solenoid valve Flow rate regulator with gas solenoid valve VAHGVR Variable airgas ratio control with gas solenoid valve Variable airgas ratio control with solenoid valve VAV115125 Flange 38 Size 115

Size 125 on request

115125 Flange frac12 Size 115

Size 125 Size 1 DN 15 115

115125 Flange frac34 Size 115

Size 125 Size 1 DN 20 120

115125 Flange 1 Size 115

Size 125 Size 1 DN 25 125

232240 Flange 1 Size 232

Size 240 on request

232240 Flange 1frac12 Size 232

Size 240 Size 2 DN 40 240

350 Flange 1frac12 Size 350 on request350 Flange 2 Size 350 Size 3 DN 50 350ML MODULINE + Rp internal thread connection fl anges Rp internal thread RTML MODULINE + NPT internal thread connection fl anges NPT internal thread N01 pu max 100 mbar (15 psig) pu max 500 mbar (7 psig) 02 200 mbar (3 psig) 500 mbar (7 psig)

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 23

Replacement possibilities for MODULINE pressure regulators with gas solenoid valve gt GVS GVI GVIB GVR and GVRH are to be replaced by VAD VAG VAG+VAS VAH and VAV

ContinuationType Type

Quick opening Quick opening NF1 Control ratio 11 Control ratio 11 K Mains voltage 24 V DC Mains voltage 24 V DC K

ndash 100 V AC PQ 120 V AC 120 V AC Q

ndash 200 V AC YT 220240 V AC 230 V AC W3 Electrical connection via terminals Electrical connection via terminals 6 Electrical connection via socket Electrical connection via socket 9 Metal terminal connection box Electrical connection via terminals S Position indicator Position indicator with visual indicator SG Position indicator for 24 V Position indicator for 24 V with visual indicator GM Suitable for biologically produced methane Suitable for biologically produced methane

Pressure test point at the inlet Pressure test point at the inlet and outlet Outlet pressure pd -25

Outlet pressure pd 25 ndash 25 mbar (1 ndash 10 WC)

2 ndash 90 mbar (08 ndash 36 WC) 20 ndash 50 mbar (8 ndash 20 WC) -5035 ndash 100 mbar (14 ndash 40 WC) -100Standard seat A

ExampleGVS 350ML01T3with Rp 2 connection flanges

ExampleVAD 350RNW-100A

with test points

= standard = available Pressure test points may be attached at the left- andor right-hand side Position indicator with visual indicator can be attached at the left- or right-hand side

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 24

∆p [i

nch

WC]

Qn [SCFH]100 400 600 4000 60001000 200020 30 40 50 200 3006015 80

1

08

1

2

3

4

56

8

10

20

30

40

5060

80

100

200

∆p [m

bar]

5

8

3

20

10

30

40

80

60

300

400

50

04 06 1 2 3 4 5 808 10 20 30 402

03 60 100 200

100

200

500

1

3

2

04 06 08 1 2 3 4 5 6 8 10 20 30 40

04 06 08 1 2 3 4 5 6 8 10

200

80 10020 3003

03Qn [m3h]

02

50 60 80 100

40 50 60

VAD

115

B

VAD

120

AVA

D 12

5A

P1P2

VAD

240

AVA

D 35

0A

= natural gas (ρ = 080 kgm3) = propane (ρ = 201 kgm3) = air (ρ = 129 kgm3)

The characteristic flow rate curves have been meas-ured with the specified flanges and a fitted strainer If two or more valves are combined the pressure loss of each additional valve drops by approx 5

metric imperial

Enter densityFlow rate Qn

Inlet pressure pu

Outlet pressure pd

Product RV v

Pressure loss ∆p

∆pmin

5 Flow rate5 1 Selection example for VADNatural gas Flow rate Qmax = 30 m3h Inlet pressure pu = 80 mbar Outlet pressure pd = 60 mbarThe desired control ratio from high-fire to low-fire rate is RV = 101High fire ∆p = pu - pd = 20 mbar Point P1Low fire Point P2 Qmin = 26 m3h at ∆p = 20 mbar RV = Qmax Qmin = 1151

Point P1 and point P2 must be within the working range of a unit size We recommend that you select the smallest size to achieve the best control properties

5 1 1 Calculate VAD

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 25

∆p [i

nch

WC]

Qn [SCFH]100 400 600 4000 60001000 200020 30 40 50 200 3006015 80

1

08

1

2

3

4

56

8

10

20

30

40

5060

80

100

200

∆p [m

bar]

5

8

3

20

10

30

40

80

60

300

400

50

04 06 1 2 3 4 5 808 10 20 30 402

03 60 100 200

100

200

500

1

3

2

04 06 08 1 2 3 4 5 6 8 10 20 30 40

04 06 08 1 2 3 4 5 6 8 10

200

80 10020 3003

03Qn [m3h]

02

50 60 80 100

40 50 60

= pd min lt 5 mbar

VAG

VxH

VAV

115

BVA

GV

xHV

AV 12

0A

VAG

VxH

VAV

125

A

P1

P2

VAG

VxH

VAV

240

AVA

GV

xHV

AV 3

50A

= natural gas (ρ = 080 kgm3) = propane (ρ = 201 kgm3) = air (ρ = 129 kgm3)

The characteristic flow rate curves have been meas-ured with the specified flanges and a fitted strainer If two or more valves are combined the pressure loss of each additional valve drops by approx 5

5 2 Selection example for VAG VAH VRH VAV Natural gas Flow rate Qmax = 30 m3h Inlet pressure pu = 80 mbar Outlet pressure pd max VAG = 60 mbarThe desired control ratio from high-fire to low-fire rate is RV = 101High fire ∆p = pu - pd max = 20 mbar Point P1Low fire pd min = pd max RV2 = 06 mbar Qmin = Qmax RV = 3 m3h ∆p = pu - pd min = 794 mbar Point P2 select VAG 120APoint P1 and point P2 must be within the working range of a unit size We recommend that you select the smallest size to achieve the best control properties

metric imperial

Enter densityFlow rate Qn

Inlet pressure pu

Outlet pressure pd

Product RV v

5 2 1 Calculate VAG VxH VAV

Pressure loss ∆p

∆pmin

Flow rate

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 26

∆p [i

nch

WC]

Qn [SCFH]100 400 600 4000 60001000 200020 30 40 50 200 3006015 80

1

08

1

2

3

4

56

8

10

20

30

40

5060

80

100

200

∆p [m

bar]

5

8

3

20

10

30

40

80

60

300

400

50

04 06 2 3 4 5 808 10 20 30 402

03 60 100 200

100

200

500

1

3

2

04 06 08 1 2 3 4 5 6 8 10 20 30 40

04 06 08 1 2 3 4 5 6 8 10

200

80 10020 3003

03Qn [m3h]

02

50 60 80 100

40 50 60

VAG

115

N

P1VAG

125

N

VAG

120

N

VAG

240

NP2

VAG

350

N

= natural gas (ρ = 080 kgm3) = propane (ρ = 201 kgm3) = air (ρ = 129 kgm3)

The characteristic flow rate curves have been meas-ured with the specified flanges and a fitted strainer If two or more valves are combined the pressure loss of each additional valve drops by approx 5

5 3 Selection example for zero governor VAG NNatural gas Flow rate Qmax = 30 m3h Inlet pressure pu = 20 mbar Outlet pressure pd = 0 mbar (atmospheric pressure)The desired control ratio from high-fire to low-fire rate is RV = 101High fire ∆p = pu - pd max = 20 mbar Point P1Low fire Point P2 Qmin = 24 m3h at ∆p = 20 mbar RV = Qmax Qmin = 1231Point P1 and point P2 must be within the working range of a unit size We recommend that you select the smallest size to achieve the best control properties

metric imperial

Enter densityFlow rate Qn

Inlet pressure pu

Outlet pressure pd

Product RV

5 3 1 Calculate VAG N

Pressure loss ∆p

∆pmin

Flow rate

v

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 27

6 Selection6 1 Selection table for pressure regulator with solenoid valve VAD

Accessories right Accessories left

Type1) T R N F N K P Q Y W S2) G2) R2) L2) M20

cab

le g

land

Plug

with

soc

ket

Plug

with

out s

ocke

t

-25-50 -100 A B Scre

w p

lug

Pres

sure

test

poi

nt

DG

17V

C 3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

Scre

w p

lug

Pres

sure

test

poi

nt

DG

17V

C 3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

VAD 115

VAD 120

VAD 125

VAD 240

VAD 350

= standard = available1) The following nominal inlet fl ange diameters are also available size 1 with nominal diameter DN 10 size 2 with nominal diameters DN 25 DN 32 and DN 50 size 3 with nominal diameters DN 40 and DN 652) Position indicator and bypasspilot gas valve cannot be fi tted together on the same side3) Specify the test point for inlet pressure pu or outlet pressure pdHelp for selecting the pressure regulator VAD can be found on the ProFi DVD wwwkromschroedercom Products DVD Product fi nder ldquoProFirdquo

Order exampleVAD 240RNW-100A

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 28

Selection

6 2 Type code for VADCode DescriptionVAD Pressure regulator with solenoid valve1 ndash 3 SizeT T-product10 ndash 65 Nominal inlet and outlet diameterRNF

Rp internal threadNPT internal thread

ISO fl angeN Quick opening quick closingKPQYW

Mains voltage 24 V DCMains voltage 100 V AC 5060 HzMains voltage 120 V AC 5060 HzMains voltage 200 V AC 5060 HzMains voltage 230 V AC 5060 Hz

SG

Position indicator with visual indicatorPosition indicator for 24 V with visual indicator

RL

Viewed from the right (in the direction of fl ow)Viewed from the left (in the direction of fl ow)

-25-50-100

Outlet pressure pd 25 ndash 25 mbar20 ndash 50 mbar

35 ndash 100 mbarAB

Standard valve seatReduced valve seat

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 29

Selection

6 3 Selection table for airgas ratio control with solenoid valve VAG flow rate regulators VAH VRH

Type1) T R N F N K P Q Y W S2) G2) R2) L2) M20

cab

le g

land

Plug

with

soc

ket

Plug

with

out s

ocke

t

A B E K A N Scre

w p

lug

Pres

sure

test

poi

ntD

G 1

7VC

3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

Scre

w p

lug

Pres

sure

test

poi

ntD

G 1

7VC

3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

VAG 115 VAG 120 VAG 125 VAG 240 VAG 350

VAH 115 VAH 120 VAH 125 VAH 240 VAH 350

VRH 115 VRH 120 VRH 125 VRH 240 VRH 350

= standard = available1) The following nominal inlet fl ange diameters are also available size 1 with nominal diameter DN 10 size 2 with nominal di-

ameters DN 25 DN 32 and DN 50 size 3 with nominal diameters DN 40 and DN 652) Position indicator and bypasspilot gas valve cannot be fi tted together on the same side3) Specify the test point for inlet pressure pu or outlet pressure pdHelp for selecting the regulators can be found on the ProFi DVD wwwkromschroedercom Products DVD Product fi nder ldquoProFirdquo

Order exampleVAG 240RNWAE

Accessories right Accessories left

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 30

Selection

6 4 Type code for VAG VAH VRHCode DescriptionVAGVAHVRH

Airgas ratio control with solenoid valveFlow rate regulator with solenoid valve

Flow rate regulator1 ndash 3 SizeT T-product15 ndash 50 Nominal inlet and outlet diameterRNF

Rp internal threadNPT internal thread

ISO fl angeN1) Quick opening quick closingK1)

P1)

Q1)

Y1)

W1)

Mains voltage 24 V DCMains voltage 100 V AC 5060 HzMains voltage 120 V AC 5060 HzMains voltage 200 V AC 5060 HzMains voltage 230 V AC 5060 Hz

S1)

G1)Position indicator with visual indicator

Position indicator for 24 V with visual indicatorRL

Viewed from the right (in the direction of fl ow)Viewed from the left (in the direction of fl ow)

AB

Standard valve seatReduced valve seat

EKAN

Connection kit for air control pressure psaVAG VAH VRH compression fi tting

VAG plastic hose couplingVAG VAH VRH NPT 18 adapter

VAG zero governor1) Only available for VAG VAV VAH

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 31

6 5 Selection table for variable airgas ratio control with solenoid valve VAVAccessories right Accessories left

Type1) T R N F N K P Q Y W S2) G2) R2) L2) M20

cab

le g

land

Plug

with

soc

ket

Plug

with

out s

ocke

t

A B E K A Scre

w p

lug

Pres

sure

test

poi

ntD

G 1

7VC

3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

Scre

w p

lug

Pres

sure

test

poi

ntD

G 1

7VC

3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

VAV 115

VAV 120

VAV 125

VAV 240

VAV 350

= standard = available1) The following nominal inlet fl ange diameters are also available size 1 with nominal diameter DN 10 size 2 with nominal diameters DN 25 DN 32 and DN 50 size 3 with nominal diameters DN 40 and DN 652) Position indicator and bypasspilot gas valve cannot be fi tted together on the same side3) Specify the test point for inlet pressure pu or outlet pressure pdHelp for selecting the variable airgas ratio control VAV can be found on the ProFi DVD wwwkromschroedercom

Products DVD Product fi nder ldquoProFirdquo

Order exampleVAV 240RNWAK

Selection

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 32

Selection

6 6 Type code for VAVCode DescriptionVAV Variable airgas ratio control with solenoid valve1 ndash 3 SizeT T-product15 ndash 50 Nominal inlet and outlet diameterRNF

Rp internal threadNPT internal thread

ISO fl angeN Quick opening quick closingKPQYW

Mains voltage 24 V DCMains voltage 100 V AC 5060 HzMains voltage 120 V AC 5060 HzMains voltage 200 V AC 5060 HzMains voltage 230 V AC 5060 Hz

SG

Position indicator with visual indicatorPosition indicator for 24 V with visual indicator

RL

Viewed from the right (in the direction of fl ow)Viewed from the left (in the direction of fl ow)

AB

Standard valve seatReduced valve seat

EKA

Connection kit for air control pressure psa and combus-tion chamber control pressure psc

compression fi ttingplastic hose coupling

NPT 18 adapter

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 33

Selection

6 7 AccessoriesModularly configurable withndash Screw plugsndash Pressure test pointsndash Pressure switch DGVC for inlet

andor outlet pressurendash Tightness control TCndash Bypasspilot gas valve VBY 8 for

size 1ndash Bypasspilot gas valve VAS 1For further information see page 37 (Accessories)

Position indicator

Plug with socket

Plug

Screwplugs

Pressuretest points

Pressure switch DGC Tightness

control TC

Bypasspilot gas valve VBY 8 for size 1

Bypasspilot gas valve VAS 1

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 34

7 Project planning informationDo not store or install the unit in the open airThe inlet pressure pu and the outlet pressure pd can be meas-ured on both sides of the valve body To increase the control accuracy an external impulse line can be connected instead of the pressure test point pd

VAD

pu

pd

(psa)

VAGpd

pu

psa

psa

VAD measurement point for the gas outlet pressure pd on the regulator body A combustion chamber control line (psc) can be connected to connection psa for maintaining a constant burner capacityVAG additional measurement point for the air control pressure psa on the regulator body

VAV

psapsc

pu

pd

VAH VRH

pu

pd-

pdpsa-

psa

VAV measurement point for the outlet pressure pd on the regulator bodyVAH additional measurement points for the outlet pressure pd- and the air control pressure psapsa- on the regulator body

7 1 Installation

GFK

VAGVAH

GFKVAD

Sealing material and thread cuttings must not be allowed to get into the valve housing Install a filter upstream of every system

gt20 mmgt0 79

The unit must not be in contact with masonry Minimum clear-ance 20 mm (079 inches)Ensure that there is sufficient space for installation and ad-justment

le +100 degCle +212 degF

The solenoid body heats up during operation ndash depending on ambient temperature (max 60degC140degF) and intrinsic heating (approx 40degC104degF)

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 35

In the case of double solenoid valves the position of the con-nection box can only be changed by removing the actuator and reinstalling it offset by 90deg or 180deg

If more than three valVario controls are installed in line the controls must be supported

The seals in some gas compression fittings are approved for temperatures of up to 70degC (158degF) This temperature limit will not be exceeded if the flow through the pipe is at least 1 msup3h (3531 SCFH) of gas and the maximum ambient temperature is 50degC (122degF)

7 1 1 Installation position

pu ge 80 mbar(80 hPa32 WC)

VAD VAG VAH VRH VAV

In humid environments black solenoid actuator in the vertical upright position only

VAD VAG VAH VRH black solenoid actuator in the vertical upright position or tilted up to the horizontal not upside downVAG VAH horizontal position only if pu ge 80 mbar (32 WC))VAV installation in the vertical position only black solenoid actuator in the vertical upright positionTo ensure that the airgas ratio control VAG the flow rate regulator VAH VRH or the variable airgas ratio control VAV can react quickly when the load is changed the impulse line for the air control pressure psa and for VAV the impulse line for the combustion chamber control pressure psc should be kept as short as possible The tube internal diameter for the impulse line must always be ge 39 mm (015)

VAH VRHIt is not permitted to install a gas solenoid valve VAS down-stream of flow rate regulator VAH VRH and upstream of fine-adjusting valve VMV The VAS would no longer be able to perform its function as a second safety valve if installed in the above-mentioned position

M

VMV

VAH

VASVAS

pd-

psa-psa

VMV

VAH pd-

psa-psa

The measuring orifice in the air line for impulse lines psa and psa- must always be installed downstream of the air control valve

Project planning information gt Installation

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 36

VAVThe impulse line for the combustion chamber control pres-sure psc must be fitted so that no condensation can enter the pressure regulator but rather flows back into the combustion chamber

7 2 Setting the low-fire rate on VAG VAH VRH VAV

-10 +05-05

ndash

+1

-15

mbar

+15

06

1 152

3

N V

+ +ndash

+30 -15+15

ndash

-3

+5

mbar

-5

N

+

VAG VAH VRH VAV

If the burner operates at low-fire rate the gasair mixture can be changed using the parallel shift of the characteristic curve by turning the adjusting screw ldquoNrdquoAdjusting range at low fire VAG VAH VRH -5 to +5 mbar (-195 to +195 WC) VAV -15 to +15 mbar (-06 to +06 WC)

7 3 Setting the high-fire rate on VAVTo set the high-fire rate the transmission ratio is changed us-ing the adjusting screw ldquoVrdquo until the required flue gas values are achievedTransmission ratio V = pdpsa = 061 to 31The settings N and V can influence each other and must be repeated if necessary

+N+V

-V

-N

VAV

psa [mbar]

p d [m

bar]

7 3 1 CalculationWith no connection to the combustion chamber control pres-sure psc pd = V times psa + NWith connection to the combustion chamber control pressure psc (pd - psc) = V times (psa - psc) + N

Project planning information

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 37

pu pd

21579

4836

085310

189

142

8 Accessories8 1 Gas pressure switch DG VC for VAx VRHType Adjusting range [mbar]DG 17VC 2 to 17DG 40VC 5 to 40DG 110VC 30 to 110DG 300VC 100 to 300

Scope of delivery 1 times pressure switch for gas 2 times retaining screws 2 times sealing rings

8 2 Gas pressure switch DG VCT for VAx T VRH TType Adjusting range [WC]DG 17VCT 08 to 68DG 40VCT 2 to 16DG 110VCT 12 to 44DG 300VCT 40 to 120

Scope of delivery 1 times gas pressure switch with AWG 18 connection wires 2 times retaining screws 2 times sealing ringsMonitoring the inlet pressure pu the electrical plug of the pressure switch for gas points towards the inlet flangeMonitoring the outlet pressure pd the electrical plug of the pressure switch for gas points towards the outlet flange

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 38

A BC

D

FE

ACD

F

B

E

8 3 Bypass valvepilot gas valve VAS 18 3 1 VAS 1 attached to VADVAGVAHVAV 1Scope of delivery A 1 times bypasspilot gas valve VAS 1 B 4 times O-rings C 4 times double nuts D 4 times connection parts E 1 times mounting aidBypass valve VAS 1 F 2 times connection pipes if the bypass valve has a blind flange

at the outlet sidePilot gas valve VAS 1 F 1 times connection pipe 1 times sealing plug if the pilot gas valve

has a threaded flange at the outlet side

Accessories

8 3 2 VAS 1 attached to VADVAGVAHVAV 2 VADVAGVAHVAV 3Scope of delivery A 1 times bypasspilot gas valve VAS 1 B 4 times O-rings C 4 times spacer sleeves D 4 times connection parts E 1 times mounting aidBypass valve VAS 1 F 2 times connection pipes if the bypass valve has a blind flange

at the outlet sidePilot gas valve VAS 1 F 1 times connection pipe 1 times sealing plug if the pilot gas valve

has a threaded flange at the outlet side

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 39

2

3

456

810

20

30

405060

80100

∆p [m

bar]

005 01 02 03 05 08 1 2 3 4 51

3

2

Qn [m3h]

1

01

02

03

0405

08

003

002

6 8 10

005 01 02 03 05 08 1 2 3 4 5003 6 8 10

20

005 01 02 03 05 08 1 2 3 4 5003 6 8 10 20

30

∆p [i

nch

WC]

1

2

3

456

810

20

30

40

04

004

006

00801

02

03

0506

08

Qn [SCFH]10 40 60 100 200 3001 500 10002 3 4 5

120 306 8

21 3 4 5 6 7 8 910

8 3 3 Flow rate

The characteristic flow rate curves have been measured for bypass valve VAS 1 with connection pipe diameter 1 to 10 mm (004 to 04) and for the pilot gas valve with 10 mm (04) connection pipe

Bypass valve connection pipe diameter [mm]

Pilo

t gas

val

ve 1

0 m

m (0

4)

conn

ectio

n pi

pe d

iam

eter

Accessories gt Bypass valvepilot gas valve VAS 1

= natural gas (ρ = 080 kgm3) = propane (ρ = 201 kgm3) = air (ρ = 129 kgm3)

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 40

Accessories

8 4 Bypass valvepilot gas valve VBY 8 for VADVAGVAHVAV 1

B

C

AVBY 8

VAx 1

55

(217)40(157)

70 (276)

80(315)

Rp frac14(pilot gas valve)

For mounting on VAD VAG VAH VAV 1 and double solenoid valve VCD VCG VCH VCV 1

8 4 1 Scope of delivery VBY 8I as bypass valveA 1 times bypass valve VBY 8IB 2 times retaining screws with 4 times O-rings both retaining screws

have a bypass orificeC 1 times grease for o-rings

8 4 2 Scope of delivery VBY 8R as pilot gas valveA 1 times pilot gas valve VBY 8RB 2 times retaining screws with 5 x O-rings one retaining screw

has a bypass orifice (2 x O-rings) the other does not (3 x O-rings)

C 1 times grease for O-rings

8 4 3 SelectionType I R W Q K 6L -R -L E B D 05

VBY 8

Order exampleVBY 8RW6L-LED

8 4 4 Type codeCode DescriptionVBY Gas solenoid valve8 Nominal sizeIR

For internal gas pick-up as bypass valveFor external gas pick-up as pilot gas valve

KQW

Mains voltage 24 V DC Mains voltage 120 V AC 5060 HzMains voltage 230 V AC 5060 Hz

6L Electrical connection via plug and socket with LED-R-L

Attachment side of main valve right-hand sideAttachment side of main valve left-hand side

EB

Attached to the VAxEnclosed (separate packing unit)

05D

Nozzle diameter = 05 mm (002)Flow adjustment

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 41

2

01

02

03

05

081

3

456

810

20

30

405060

80100

∆p [m

bar]

1

3

201 02 03 05 1 2 3001 003 4

Qn [m3h]

02 03 05 1 2

01 02 05

002 006

002

002 006 1

0010006 005 01

001

0003

0006 2 3

VBY 8DVBY 805

∆p [i

nch

WC]

1

2

3

456

810

20

30

40

040506

08

1

Qn [SCFH]10 40 60 1005 2081 2 30402

01

02

03

004005006

008

Adjusting range

8 4 5 Flow rateVBY 8 D

+

-

The flow rate can be set by turning the flow rate restrictor (4 mm016 Allen screw) frac14 of a turn Flow rate 10 to 100

VBY 8 05The flow is routed through a 05 mm (002) nozzle and thus has a fixed characteristic flow rate curve Adjustment is not possible

8 4 6 Technical dataInlet pressure pu max 500 mbar (7 psig)Ambient temperature 0 to +60degC (32 to 140degF) no condensation permittedStorage temperature 0 to +40degC (32 to 104degF) no condensation permittedPower consumption 24 V = 8 W 120 V = 8 W 230 V = 95 WEnclosure IP 54

Accessories gt Bypass valvepilot gas valve VBY 8 for VADVAGVAHVAV 1

= natural gas (ρ = 080 kgm3) = propane (ρ = 201 kgm3) = air (ρ = 129 kgm3)

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 42

TC 116VB C

56(22)

49(193)

27(106)

A

A

VCx 1 VCx 2VCx 3

8 5 Tightness control TC 116Vfor VAx 1 ndash 3An adapter plate is required to attach the tightness control to the right- or left-hand side of the pressure regulator with gas solenoid valveScope of delivery A 1 times adapter plate B 2 times O-rings C 2 times retaining screwsFor attachment to left-hand side Order No 74922391 right-hand side Order No 74921995

8 6 Pressure test pointsTest points to check the inlet pressure pu and outlet pressure pdScope of delivery 1 x pressure test points with 1 x profiled sealing rings Order No 74923390

8 7 Cable gland setWhen wiring a double solenoid valve with pressure regula-tor VCx the connection boxes are to be connected using a cable gland setThe cable gland set can only be used if the connection boxes are at the same height and on the same side and if both valves are equipped either with or without a proof of closure switchVA 1 Order No 74921985 VA 2 Order No 74921986 VA 3 Order No 74921987

Accessories

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 43

A B

D

C

Accessories

8 9 Differential pressure orifice

Size PipeDN

Differential pressure orifi cewith outlet dia

1 15 17 mm 0671 20 25 mm 0981 25 30 mm 1182 40 46 mm 1813 50 58 mm 228

If pressure regulator VADVAGVAV 1 is retrofitted upstream of gas solenoid valve VAS 1 a DN 25 differential pressure orifice with outlet opening d = 30 mm (118) must be inserted at the outlet of the pressure regulatorIn the case of pressure regulator VAx 115 or VAx 120 the DN 25 differential pressure orifice must be ordered separately and retrofitted Order No 74922240

8 8 Seal set VA 1 ndash 3VA 1 Order No 74921988 VA 2 Order No 74921989 VA 3 Order No 74921990Scope of deliveryA 1 times double block seal B 2 times O-rings (flange) C 2 times O-rings (pressure switch) for pressure test pointscrew plug D 2 times sealing rings (flat sealing) and 2 times profiled sealing rings

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 44

BA

C

pd-

8 11 Attachment blockFor locked installation of pressure gauge and other acces-soriesScope of delivery A 1 times attachment block B 2 times self-tapping screws for installation C 2 times O-rings

Accessories

8 10 Retaining frameIn the event that a pressure regulator VAx is installed at a later point upstream of a gas solenoid valve VAS a measur-ing orifice VMO or a fine-adjusting valve VMV the retaining frame must be fitted at the inlet of the second device in order to fasten the differential pressure orifice at the regulator outlet Order the retaining frame separatelyRetaining frame for Size 1 Order No 74923029 Size 2 Order No 74923030 Size 3 Order No 74923031

8 12 Gas control lineFine-adjusting valve VMV can be installed on the flow rate regulator VAH for fine adjustment of the gas flow rateThe gas control line for gas outlet pressure pd- is available with 2 18 compression fittingsSize 1 Order No 74924458 Size 2 Order No 74924459

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 45

8 13 Measuring orifice VMOThe measuring orifice VMO is designed to reduce the gas and air flow rates and is installed downstream of the valVario control The measuring orifice is available with Rp internal thread (NPT internal thread) or flange to ISO 7005See wwwdocuthekcom Elster Kromschroumlder Krom-schroumlder LBE Products 03 Valves and butterfly valves valVario accessories Type of document Technical Informa-tion VMO

Accessories

8 14 Filter module VMFUsing the filter module VMF the gas flow upstream of the gas solenoid valve VAS and the airgas ratio control is cleaned The filter module is available with Rp internal thread (NPT internal thread) or flange to ISO 7005 and can also be supplied with fitted pressure switch as an optionSee wwwdocuthekcom Elster Kromschroumlder Krom-schroumlder LBE Products 03 Valves and butterfly valves valVario accessories Type of document Technical Informa-tion VMF

8 15 Fine-adjusting valve VMVThe flow rate is set using the fine-adjusting valve VMV The fine-adjusting valve is available with Rp internal thread (NPT internal thread) or flange to ISO 7005See wwwdocuthekcom Elster Kromschroumlder Krom-schroumlder LBE Products 03 Valves and butterfly valves valVario accessories Type of document Technical Infor-mation VMV

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 46

9 Technical dataGas types natural gas LPG (gaseous) biologically produced methane (max 01 -by-vol H2S) or clean air other gases on request The gas must be clean and dry in all temperature conditions and must not contain condensateCE and FM approved UL listed max inlet pressure pu 10 ndash 500 mbar (4 ndash 200 WC) FM approved (230 V AC 120 V AC 24 V DC) non opera-tional pressure 700 mbar (10 psig)ANSICSA approved (230 V AC 120 V AC 24 V DC) up to 350 mbar (5 psig)Opening time of the solenoid valve quick opening le 05 s Closing time quick closing lt 1 sMedium and ambient temperatures -20 to +60degC (-4 to +140degF) no condensation permittedStorage temperature -20 to +40degC (-4 to +104degF)Enclosure IP 65Valve housing aluminium valve seal NBRConnection flanges with internal thread Rp to ISO 7-1 NPT to ANSIASMESafety valve Class A to EN 161 Factory Mutual Research Class 7400 Process Control Valves (230 V AC 120 V AC 24 V DC) ANSI Z2121 and CSA 65 ANSI Z2118 and CSA 63Control class A to EN 88-1Control range up to 101

Mains voltage 230 V AC +10-15 5060 Hz 200 V AC +10-15 5060 Hz 120 V AC +10-15 5060 Hz 100 V AC +10-15 5060 Hz 24 V DC plusmn20Duty cycle 100Power factor of the solenoid coil cos φ = 09Power consumption

Type Voltage Power

VAx 1

24 V DC 25 W ndash100 V AC 25 W (26 VA)120 V AC 25 W (26 VA)200 V AC 25 W (26 VA)230 V AC 25 W (26 VA)

VAx 2 VAx 3

24 V DC 36 W ndash100 V AC 36 W (40 VA)120 V AC 40 W (44 VA)200 V AC 40 W (44 VA)230 V AC 40 W (44 VA)

VBY24 V DC 8 W ndash

120 V AC 8 W ndash230 V AC 95 W ndash

Cable gland M20 times 15Electrical connection cable with max 25 mm2 (AWG 12) or plug with socket to EN 175301-803

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 47

Position indicator contact rating

Type Voltage Min current(resistive load)

Max current(resistive load)

VAxS VCxS 12 ndash 250 V AC 5060 Hz 100 mA 3 AVAxG VCxG 12 ndash 30 V DC 2 mA 01 A

Position indicator switching frequency max 5 times per minute

Switching current [A]

Switching cyclescos φ = 1 cos φ = 06

01 500000 50000005 300000 250000

1 200000 1000003 100000 ndash

Limited to max 200000 cycles for heating systems

9 1 VADOutlet pressure pd VAD-25 25 ndash 25 mbar (1 ndash 10 WC) VAD-50 20 ndash 50 mbar (8 ndash 20 WC) VAD-100 35 ndash 100 mbar (14 ndash 40 WC)Combustion chamber control pressure psc (connection psa)

-20 to +20 mbar (-78 to +78 WC)

VAD

pu

pd

(psa)

9 2 VAGOutlet pressure pd 05 ndash 100 mbar (02 ndash 40 WC)Air control pressure psa 05 ndash 100 mbar (02 ndash 40 WC)

Adjusting range at low fire plusmn5 mbar (plusmn2 WC)Transmission ratio of gas to air 11The inlet pressure must always be higher than the air control pressure psa + pressure loss ∆p + 5 mbar (2 WC)

VAGpd

pu

psa

psa

VAGK 1 x 18 coupling for plastic hose (internal dia 39 mm (015) external dia 61 mm (024)) or VAGE 1 x 18 compression fitting for 6 times 1 tube or VAGA 1 x NPT 18 adapter or VAGN zero governor with breathing orifice

9 3 VAH VRHAir control pressure psa 06 ndash 100 mbar (024 ndash 40 WC) Differential air pressure ∆psa (psa - psa-) 06 ndash 50 mbar (024 ndash 197 WC) Differential gas pressure ∆pd (pd - pd-) 06 ndash 50 mbar (024 ndash 197 WC)Transmission ratio of gas to air 11The inlet pressure must always be higher than the differen-tial air pressure ∆psa + pressure loss ∆p + max gas pres-sure on burner + 5 mbar (2 WC)Adjusting range at low fire plusmn5 mbar (plusmn2 WC)

Technical data

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 48

VAHVRH

pd-

pu

psa-

psa

Connection of the air control pressure psaVAHE VRHE 3 x 18 compression fitting for 6 times 1 tube or VAHA VRHA 3 x NPT 18 adapter

9 4 VAVOutlet pressure pd 05 ndash 30 mbar (02 ndash 117 WC)Air control pressure psa 04 ndash 30 mbar (015 ndash 117 WC)Combustion chamber control pressure psc

-20 to +20 mbar (-78 to +78 WC)Min control pressure differential psa - psc 04 mbar (015 WC)Min pressure differential pd - psc 05 mbar (02 WC)Adjusting range at low fire plusmn15 mbar (plusmn06 WC)Transmission ratio of gas to air 061 to 31The inlet pressure pu must always be higher than the air control pressure psa times transmission ratio V + pressure loss ∆p + 15 mbar (06 WC)

pu

pd psapsc

VAV

VAVK 2 x plastic hose couplings (internal dia 39 mm (015) external dia 61 mm (024)) or VAVE 2 x 18 compression fitting for 6 times 1 tube or VAVA 2 x NPT 18 adapter

Technical data

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 49

9 5 Safety-specific characteristic values for VAx 1 ndash 3For SILSuitable for Safety Integrity Level SIL 1 2 3

Diagnostic coverage DC 0

Type of subsystem Type A to EN 61508-2 74312

Operating mode High demand mode pursu-ant to EN 61508-4 3512

For PLSuitable for Performance Level PL a b c d e

Category B 1 2 3 4Common cause failure CCF gt 65Application of essential safety requirements Satisfied

Application of tried-and-tested safety requirements Satisfied

For SIL and PL

B10d value

Operating cyclesVAD VAG VAV VAH 1 10094360VAD VAG VAV VAH 2 8229021VAD VAG VAV VAH 3 6363683

Hardware fault tolerance (1 valve) HFT 0

Hardware fault tolerance (2 valves) HFT 1

Safe failure fraction SFF gt 90Fraction of undetected com-mon cause failures β ge 2

Max service life under operating conditions10 years after date of production plus max 12 year in stor-age prior to first use or once the given number of operating cycles has been reached depending on which is achieved firstThe devices are suitable for single-channel systems (HFT = 0) up to SIL 2PL d and up to SIL 3PL e when two re-dundant valves are installed in a double-channel architecture (HFT = 1) provided that the complete system complies with the requirements of EN 61508ISO 13849

For a glossary of terms see page 53 (Glossary)

Technical data

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 50

nop 1hnop 1a

sB10d

T10d aPFHD (1 VAx) 1h

PFHD (2 VAx) 1h

PFDavg (1 VAx)

PFDavg (2 VAx)

Technical data gt Safety-specific characteristic values for VAx 1 ndash 3

9 5 1 Determining the PFHD value the λD value and the MTTFd value

PFHD = λD = x nop= 1MTTFd

01B10d

PFDavg = x λD x 24 x 365 x T10d 12

Type

Cycle time

suitable for

suitable for

PFHD = Probability of dangerous failure (HDM = high de-mand mode) [1hour]PFDavg = Average probability of dangerous failure on de-mand (LDM = low demand mode)λD = Mean dangerous failure rate [1hour]MTTFd = Mean time to dangerous failure [hours]nop = Demand rate (mean number of annual operations) [1hour]

9 5 2 Calculating the PFHD and PFDavg

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 51

VAD VAG VAH VAV

H1

Rp frac14(NPT frac14)

H2

E

LF

F

H4

H3

B

VAxS VAxF

L2G

G

Technical data

9 6 Dimensions

Type

Connec-tion Dimensions

WeightRpNPT DN

L L2 E F G H1 H2 H3 H4 Bmm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch kg lbs

VAx 115 12 15 75 29 ndash ndash 75 29 15 06 ndash ndash 143 56 82 32 161 63 117 46 97 38 18 40VAH 115 12 15 75 29 ndash ndash 75 29 15 06 ndash ndash 143 56 100 39 161 63 135 53 97 38 2 44VAx 120 34 20 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 82 33 161 63 117 46 97 38 19 42VAH 120 34 20 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 100 39 161 63 135 53 97 38 21 46VAx 125 1 25 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 82 33 161 63 117 46 97 38 19 42VAH 125 1 25 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 100 39 161 63 135 53 97 38 21 46VAx 240 112 40 128 50 200 79 85 33 29 11 66 26 170 67 112 44 191 75 162 64 125 49 44 97VAH 240 112 40 128 50 200 79 85 33 29 11 66 26 170 67 132 52 191 75 182 72 125 49 47 104VAx 350 2 50 155 61 230 91 85 33 36 14 74 29 180 70 135 53 201 79 196 77 160 63 61 134VAH 350 2 50 155 61 230 91 85 33 36 14 74 29 180 70 156 61 201 79 217 85 160 63 64 141

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 52

10 Converting unitssee wwwadlatusorg

11 Maintenance cyclesAt least once per annum at least twice per annum for biologi-cally produced methaneIf the flow rate drops clean the strainer

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 53

12 Glossary12 1 Diagnostic coverage DCMeasure of the effectiveness of diagnostics which may be determined as the ratio between the failure rate of detected dangerous failures and the failure rate of total dangerous failuresNOTE Diagnostic coverage can exist for the whole or parts of a safety-related system For example diagnostic cover-age could exist for sensors andor logic system andor final elements Unit see EN ISO 13849-12008

12 2 Mode of operationHigh demand mode or continuous modeOperating mode where the frequency of demands for opera-tion made on a safety-related system is greater than one per year or greater than twice the proof-test frequencysee EN 61508-42008

12 3 CategoryClassification of the safety-related parts of a control system in respect of their resistance to faults and their subsequent behaviour in the fault condition and which is achieved by the structural arrangement of the parts fault detection andor by their reliability see EN ISO 13849-12008

12 4 Common cause failure CCFFailures of different items resulting from a single event where these failures are not consequences of each othersee EN ISO 13849-12008

12 5 Fraction of undetected common cause failures β Fraction of undetected failures of redundant components due to a single event whereby these failures are not based on mutual causesNOTE β is expressed as a fraction in the equations and as a percentage elsewheresee EN 61508-62010

12 6 B10d valueMean number of cycles until 10 of the components fail dan-gerouslysee EN ISO 13849-12008

12 7 T10d valueMean time until 10 of the components fail dangerouslysee EN ISO 13849-12008

12 8 Hardware fault tolerance HFTA hardware fault tolerance of N means that N + 1 is the mini-mum number of faults that could cause a loss of the safety functionsee IEC 61508-22010

12 9 Mean dangerous failure rate λD Mean rate of dangerous failures during operation time (T10d) Unit 1hsee EN ISO 13849-12008

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 54

12 10 Safe failure fraction SFFFraction of safe failures related to all failures which are as-sumed to appearsee EN 13611A22011

12 11 Probability of dangerous failure PFHD Value describing the likelihood of dangerous failure per hour of a component for high demand mode or continuous mode Unit 1hsee EN 13611A22011

12 12 Mean time to dangerous failure MTTFd Expectation of the mean time to dangerous failuresee EN ISO 13849-12008

12 13 Demand rate nop Mean number of annual operationssee EN ISO 13849-12008

12 14 Average probability of dangerous failure on demand PFDavg (LDM = 1 ndash 10 switching cyclesyear)Average probability of a dangerous failure of the safety function on demand (LDM = low demand mode)see EN 61508-6

Glossary

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415

Finally we are offering you the opportunity to assess this ldquoTechnical Information (TI)rdquo and to give us your opinion so that we can improve our documents further and suit them to your needs

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ComprehensionCoherentToo complicatedNo answer

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UseTo get to know the productTo choose a productPlanningTo look for information

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Remarks

(Adobe Reader 7 or higher required) wwwadobecom

Elster GmbH Postfach 2809 middot 49018 Osnabruumlck Strotheweg 1 middot 49504 Lotte (Buumlren) GermanyT +49 541 1214-0 F +49 541 1214-370 infokromschroedercomwwwkromschroedercom

The current addresses of our international agents are available on the Internetwwwkromschroederdeindexphpid=718ampL=1

We reserve the right to make technical modifications in the interests of progressCopyright copy 2015 Elster GmbH All rights reserved

Contact

Feedback

0325

0530

  • Pressure regulators with solenoid valve VAD VAG VAV VAH
  • Flow rate regulator VRH
  • Pressure regulators with double solenoid valve VCD VCG VCV VCH
  • Contents
  • 1 Application
    • 11 Examples of application
      • 111 Constant pressure control
      • 112 Constant pressure control with two gas solenoid valves
      • 113 Constant pressure control with max pressure switch
      • 114 Constant pressure control with non-controlled pilot gas outlet
      • 115 Modulating control
      • 116 Modulating control with two gas solenoid valves
      • 117 Modulating control with two gas solenoid valves and inlet pressure switch
      • 118 HighLow control
      • 119 Zero pressure control
      • 1110 Staged flow rate control
      • 1111 Continuous or staged flow rate control
      • 1112 Modulating control with variable airgas ratio control with gas solenoid valve
      • 1113 Modulating control in residential heat generation
          • 2 Certification
          • 3 Function
            • 31 VAD VAG VAH VRH VAV
              • 311 Pressure regulator for gas VAD
              • 312 Airgas ratio control VAG
              • 313 Flow rate regulators VAH VRH
              • 314 Variable airgas ratio control VAV
              • 315 Pressure regulator with gas solenoid valve VAxS position indicator with visual indicator
                • 32 Animation
                • 33 Connection diagram
                  • 331 VAx with M20 cable gland
                  • 332 VAx with plug
                  • 333 VAS with VADVAGVAHVAV with M20 cable gland
                  • 334 VAS with VADVAGVAHVAV with plug
                      • 4 Replacement possibilities for MODULINE pressure regulators with gas solenoid valve
                        • 41 GVS GVI GVIB GVR and GVRH are to be replaced by VAD VAG VAG+VAS VAH and VAV
                          • 5 Flow rate
                            • 51 Selection example for VAD
                              • 511 Calculate VAD
                                • 52 Selection example for VAG VAH VRH VAV
                                  • 521 CalculateVAG VxHVAV
                                    • 53 Selection example for zero governor VAGN
                                      • 531 Calculate VAGN
                                          • 6 Selection
                                            • 61 Selection table for pressure regulator with solenoid valve VAD
                                            • 62 Type code for VAD
                                            • 63 Selection table for airgas ratio control with solenoid valve VAG flow rate regulators VAH VRH
                                            • 64 Type code for VAG VAH VRH
                                            • 65 Selection table for variable airgas ratio control with solenoid valve VAV
                                            • 66 Type code for VAV
                                            • 67 Accessories
                                              • 7 Project planning information
                                                • 71 Installation
                                                  • 711 Installation position
                                                    • 72 Setting the low-fire rate on VAG VAH VRH VAV
                                                    • 73 Setting the high-fire rate on VAV
                                                      • 731 Calculation
                                                          • 8 Accessories
                                                            • 81 Gas pressure switch DGVC for VAx VRH
                                                            • 82 Gas pressure switch DGVCT for VAxT VRHT
                                                            • 83 Bypass valvepilot gas valve VAS 1
                                                              • 831 VAS 1 attached to VADVAGVAHVAV 1
                                                              • 832 VAS 1 attached to VADVAGVAHVAV 2 VADVAGVAHVAV 3
                                                              • 833 Flow rate
                                                                • 84 Bypass valvepilot gas valve VBY 8 for VADVAGVAHVAV 1
                                                                  • 841 Scope of delivery VBY 8I as bypass valve
                                                                  • 842 Scope of delivery VBY 8R as pilot gas valve
                                                                  • 843 Selection
                                                                  • 844 Type code
                                                                  • 845 Flow rate
                                                                  • 846 Technical data
                                                                    • 85 Tightness control TC 116V
                                                                    • 86 Pressure test points
                                                                    • 87 Cable gland set
                                                                    • 88 Seal set VA 1thinspndashthinsp3
                                                                    • 89 Differential pressure orifice
                                                                    • 810 Retaining frame
                                                                    • 811 Attachment block
                                                                    • 812 Gas control line
                                                                    • 813 Measuring orifice VMO
                                                                    • 814 Filter module VMF
                                                                    • 815 Fine-adjusting valve VMV
                                                                      • 9 Technical data
                                                                        • 91 VAD
                                                                        • 92 VAG
                                                                        • 93 VAH VRH
                                                                        • 94 VAV
                                                                        • 95 Safety-specific characteristic values for VAx 1thinspndashthinsp3
                                                                          • 951 Determining the PFHD value the λD value and the MTTFd value
                                                                          • 952 Calculating the PFHD and PFDavg
                                                                            • 96 Dimensions
                                                                              • 10 Converting units
                                                                              • 11 Maintenance cycles
                                                                              • 12 Glossary
                                                                                • 121 Diagnostic coverage DC
                                                                                • 122 Mode of operation
                                                                                • 123 Category
                                                                                • 124 Common cause failure CCF
                                                                                • 125 Fraction of undetected common cause failures β
                                                                                • 126 B10d value
                                                                                • 127 T10d value
                                                                                • 128 Hardware fault tolerance HFT
                                                                                • 129 Mean dangerous failure rate λD
                                                                                • 1210 Safe failure fraction SFF
                                                                                • 1211 Probability of dangerous failure PFHD
                                                                                • 1212 Mean time to dangerous failure MTTFd
                                                                                • 1213 Demand rate nop
                                                                                • 1214 Average probability of dangerous failure on demand PFDavg
                                                                                  • Feedback
                                                                                  • Contact
                                                                                      1. naechste_Seite 24
                                                                                      2. naechste Seite 18
                                                                                      3. naechste Seite 6
                                                                                      4. naechste Seite 16
                                                                                      5. naechste Seite 14
                                                                                      6. naechste Seite 25
                                                                                      7. naechste_Seite 11
                                                                                      8. naechste_Seite 17
                                                                                      9. fbArbeitspunkt_Min Ja
                                                                                      10. fbArbeitspunkt Ja
                                                                                      11. ftProgramm Standard-Programm
                                                                                      12. fz_kv
                                                                                      13. fz_pe 80
                                                                                      14. fz_pG 60
                                                                                      15. fzDelta_p_Soll 20
                                                                                      16. ftEinheit_Druck mbar
                                                                                      17. fatTyp [115]
                                                                                      18. fbArbeitspunkt_Min_2 Ja
                                                                                      19. fbArbeitspunkt_2 Ja
                                                                                      20. ftRegler_Typ VAG
                                                                                      21. ftProgramm_2 Standard-Programm
                                                                                      22. fz_kv_2
                                                                                      23. fatMedium [08]
                                                                                      24. fzDichte 08
                                                                                      25. ftEinheit_Dichte kgm3
                                                                                      26. fzV_Norm 30
                                                                                      27. ftEinheit_Volstrom m3h
                                                                                      28. fz_pe_2 80
                                                                                      29. fz_pG_2 60
                                                                                      30. fzDelta_p_Soll_2 20
                                                                                      31. ftEinheit_Druck2 [mbar]
                                                                                      32. ftEinheit_Geschw [ms]
                                                                                      33. fatTyp_2 [10954451150103322]
                                                                                      34. fbArbeitspunkt_Min_3 Ja
                                                                                      35. fbArbeitspunkt_3 Ja
                                                                                      36. ftProgramm_3 Standard-Programm
                                                                                      37. fz_kv_3
                                                                                      38. fz_pe_3 20
                                                                                      39. fz_pG_3 0
                                                                                      40. fzDelta_p_Soll_3 20
                                                                                      41. fatTyp_3 [123]
                                                                                      42. fatSchaltleistung [6363683]
                                                                                      43. fz_nop_Stunde 1
                                                                                      44. fz_nop_Jahr 8760
                                                                                      45. fzZyklus 3600
                                                                                      46. fzB10d 6363683
                                                                                      47. fzT10d 10
                                                                                      48. fzPFHd_1V 15714170551864384e-8
                                                                                      49. fzPFDavg_1V
                                                                                      50. ftGeeignet_1V PL d SIL 2
                                                                                      51. fzPFHd_2V 33505832253532625e-10
                                                                                      52. fzPFDavg_2V
                                                                                      53. ftGeeignet_2V PL e SIL 3
                                                                                      54. ftUebersicht Off
                                                                                      55. ftVerstaendlichkeit Off
                                                                                      56. ftFehlende_Info
                                                                                      57. ftUmfang Off
                                                                                      58. ftVerwendung_1 Off
                                                                                      59. ftVerwendung_2 Off
                                                                                      60. ftVerwendung_3 Off
                                                                                      61. ftVerwendung_4 Off
                                                                                      62. ftNavigation Off
                                                                                      63. ftTaetigkeitsbereich Off
                                                                                      64. ftBemerkung
                                                                                      65. Michael Rehkamp Elster Kromschroumlder>btnSenden
Page 4: VAD, VAG, VAV, VAH, VRH, VCD, VCG, VCV, VCH · PDF fileVAD, VAG, VAH, VAV, VRH, VCD, VCG, VCV, VCH · Edition 04.15 6 VAD VAD VAS 1 .1 Examples of application 1 .1 .1 Constant pressure

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 4

VAD VAG VAH VAV VRH

1 ApplicationRegulators with solenoid valves are designed for shut-off and thanks to the servo technology for precise control of the gas supply to gas burners and gas appliances They are used in gas control and safety systems in all sectors of the iron steel glass and ceramics industries as well as in residential or commercial heat generation such as the packaging paper and foodstuffs industries

VADConstant pressure governor Class A with high control accu-racy for excess air burners atmospheric burners or single-stage forced draught burners Pressure preset via setpoint spring In the case of fluctuating furnace or kiln pressures the furnace chamber pressure may also be connected for maintaining a constant burner capacity

VAGAirgas ratio control Class A for maintaining a constant airgas pressure ratio for modulating-controlled burners or with VAS 1 bypass valve for stage-controlled burners Pressure preset by the air control line

The VAGN can also be used as a zero governor for gas engines

VAH VRHFlow rate regulators VAH and VRH are used to maintain a constant gasair ratio for modulating-controlled and stage-controlled burners The gas flow rate is controlled proportio-nally to the air flow rateIn addition flow rate regulator VAH is designed as a gas solenoid valve and shuts off the gas or air supply safely

VAVVariable airgas ratio control Class A for maintaining a con-stant gasair pressure ratio for modulating-controlled burners Pressure preset by the air control line The ratio of gas pressure to air pressure remains constant It can be set from 061 to 31 Pressure fluctuations in the combustion chamber can be compensated via the combustion chamber control pressure

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 5

Application

Pressure regulator on excess air burners in the ceramics in-dustry

Airgas ratio control on melting furnace for ensuring stoichio-metric combustion over the entire capacity range

Aluminium age-hardening furnace with airgas ratio controls for air deficiency cut-out

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 6

VAD

VADVAS

1 1 Examples of application1 1 1 Constant pressure controlThe pressure regulator with gas solenoid valve VAD maintains the set gas outlet pressure pd constant when subject to differing flow rates If a second gas so-lenoid valve is used upstream of the VAD this complies with the requirements of EN 746-2 for two Class A gas solenoid valves connected in series

1 1 2 Constant pressure control with two gas solenoid valvesThe pressure regulator with gas solenoid valve VAD maintains the set gas outlet pressure pd constant when subject to differing flow rates

Application

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 7

VAD

DGCmin DGCmax

VASPZL PZH

DGCmin DGCmax

VADVAS

VAS

PZL PZH

1 1 3 Constant pressure control with max pressure switchIn this example the minimum inlet pres-sure pu and the maximum outlet pres-sure pd are monitored with the pressure switches DGC The simple attachment of the pressure switch module makes installation easier

1 1 4 Constant pressure control with non-controlled pilot gas outletIn this application the pilot burner is supplied with a high inlet pressure via the pilot gas outlet The simple attach-ment of the bypass valve module makes installation easier The minimum inlet pressure pu and the maximum outlet pressure pd are monitored with the pres-sure switches DGC

Application gt Examples of application

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 8

psa

psa

VAG

MIC + BVA

psa

psaM

IC + BVA

VASVAG

1 1 5 Modulating controlThe gas outlet pressure pd is con trolled via the airgas ratio control with gas so-lenoid valve VAG The gas outlet pres-sure pd follows the changing air control pressure psa The ratio of gas pressure to air pressure remains constant The VAG is suitable for a control range up to 101If a second solenoid valve is used up-stream of the VAG this complies with the requirements of EN 746-2 for two Class A valves connected in series

1 1 6 Modulating control with two gas solenoid valvesThe gas outlet pressure pd is con trolled via the airgas ratio control with gas so-lenoid valve VAG The gas outlet pres-sure pd follows the changing air control pressure psa The ratio of gas pressure to air pressure remains constant The VAG is suitable for a control range up to 101The gas line is two Class A shut-off valves connected in series in accordance with the requirements of EN 746-2

Application gt Examples of application

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 9

DGCmin

PZL

psa

psa

M

IC + BVA

VAS

VAG

psa

DGCmin

PZL

psa

M

IC 40 + BVA

VAS

VAG

VAS 1

1 1 7 Modulating control with two gas solenoid valves and inlet pressure switchIn this case the minimum inlet pressure pu is monitored by the pressure switch DGC The simple attachment of the pressure switch module makes instal-lation easier

1 1 8 HighLow controlAt high fire the gas outlet pressure pd follows the air control pressure psa The ratio of gas pressure to air pressure re-mains constant Low fire is determined via the bypass valve VAS 1 Here as well the simple attachment of the bypass valve module makes installation easier

Application gt Examples of application

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 10

Venturi

DGCmin

PZL

M

IC + BVA

VASVAGN

1 1 9 Zero pressure controlIn this application the control air pres-sure is the atmospheric air pressure The air flow rate generates a negative pressure in the gas pipe via the Venturi This negative pressure is compensated by the airgas ratio control with gas solenoid valve VAGN The greater the negative pressure the greater the gas flow rate

Application gt Examples of application

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 11

BVHM + MB7L

VMV

ECOMAX

VASN

BCU BZA

Prozess SteuerungProcess Control (PCC)

AKT

psa-

psa

pd-

VAH

1 1 10 Staged flow rate controlThis application shows the VAH on a self recuperative burnerThe pressure loss in the recuperator de-pends on the furnace or kiln temperature When the furnace or kiln temperature is increased (at a constant air supply pres-sure) the flow rate drops This change in the air flow rate is measured by the orifice and the VAH changes the gas volume accordinglyThe air index (lambda) can be set using the fine-adjusting valve VMV

Application gt Examples of application

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 12

M

IC + BVA

VMV

VMO

VAH

VAS

psa-psa

pd-

psa

psc

DGCmin

PZL

psa

psc

M

IC + BVA

VAS VAV

1 1 11 Continuous or staged flow rate controlThis application shows flow rate control for a radiant tube burner system with plug-in recuperator for air preheatingThere are temperature-dependent air pressure losses in the recuperator The ratio of gas pressure to air pressure does not remain constant The fluctuating air flow rate is measured at the measuring orifice VMO and the VAH controls the gas flow rate proportionallyThe air index (lambda) can be set using the fine-adjusting valve VMV

Application gt Examples of application

1 1 12 Modulating control with variable airgas ratio control with gas solenoid valveThe ratio of gas pressure to air pressure can be adjusted infinitely between 061 and 31 Pressure fluctuations in the com-bustion chamber can be compensated via the combustion chamber control pressure psc see page 15 (Function)

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 13

DGCmin

PZL

psa

psc

VAS VAV

1 1 13 Modulating control in residential heat generationThis application shows the variable airgas ratio control with solenoid valve VAV fitted to a modulating-controlled forced draught burnerThe combustion air volume is set via a butterfly valve for air or by adjusting the fan speed

Application gt Examples of application

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 14

2 CertificationCertificates ndash see Docuthek

VAD VAG VAV VAH certified to SIL and PL

For systems up to SIL 3 pursuant to EN 61508 and PL e pursu-ant to ISO 13849

VAD VAG VAV VAHEU certified pursuant to

ndash Gas Appliances Directive (2009142EC) in conjunction with EN 13611 EN 161 EN 88-1 EN 126 and EN 1854

Meets the requirements of thendash Low Voltage Directive (200695EC)ndash EMC Directive (2004108EC)

VAD VAG VAV VAH FM approved

Factory Mutual Research Class 7400 Process Control Valves Designed for applications pursuant to NFPA 85 and NFPA 86 www approvalguide com

VAD VAG ANSICSA approved

American National Standards InstituteCanadian Standards Association ndash ANSI Z21 21CSA 6 5 ANSI Z21 18 and CSA 6 3

wwwcsagrouporg ndash Class number 3371-83 (natural gas LPG) 3371-03 (natural gas propane)

VAD VAG VAV UL listed

Underwriters Laboratories ndash UL 429 ldquoElectrically operated valvesrdquo wwwulcom Tools (at the bottom of the page) Online Certifications Directory

VAD VAG VAV AGA approved

AGA

Australian Gas Association Approval No 5319 httpwww aga asn auproduct_directory

Eurasian Customs Union

The product VAD VAG VAV VAH VCD VCG VCV VCH meets the technical specifications of the Eurasian Customs Union (the Russian Federation Belarus Kazakhstan)

Approval does not apply for 100 V AC and 200 V AC

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 15

3 Function3 1 VAD VAG VAH VRH VAVThe regulator is closed when it is disconnected from the power supplyOpening connect the system to the electrical power supply (alternating voltage will be rectified) The blue LED lights up The coilrsquos magnetic field pulls the armature upwards and clears the supply nozzle for the gas inlet pressure pu The gas passes through the internal impulse tube to the adjustment diaphragm and then pushes the valve disc open The outlet pressure is applied to the servo diaphragm via the internal feedback

The servo regulator then maintains a set constant outlet pres-sure pd

3 1 1 Pressure regulator for gas VADThe nominal outlet pressure pd is defined by the control spring

Servoregulator

Valve

Armature

Valve disc

Adjustmentdiaphragm

Servodiaphragm

Internalfeedback

Controlspring

Solenoid coil

Supplynozzle

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 16

3 1 2 Airgas ratio control VAGThe airgas ratio control VAG controls the outlet pressure pd depending on the variable air control pressure psaThe ratio of gas pressure to air pressure remains constant 11 The VAG is suitable for a control range up to 101If the burner operates at low-fire rate the gasair mixture can be changed by adjusting the zero point spring ldquoNrdquo

Function

psa

pd

Zero point setting N zero point spring

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 17

Function

3 1 3 Flow rate regulators VAH VRHThe flow rate regulators VAH VRH control the gas flow rate depending on the variable air flow rate The ratio of gas flow rate to air flow rate remains constant If the burner operates at low-fire rate the gasair mixture can be changed by adjusting the zero point spring ldquoNrdquoIn addition flow rate regulator VAH is designed as a gas solenoid valve and shuts off the gas or air supply safely

psa

psa-

pd-

pdInternal feedback

Zero point setting N zero point spring

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 18

3 1 4 Variable airgas ratio control VAVThe servo regulator maintains a set constant outlet pressure pd The variable airgas ratio control VAV controls the outlet pressure pd depending on the variable air control pressure psa The ratio of gas pressure to air pressure remains constantThe settings N and V can be changed and read off from both sides of the unit using the adjusting screwsThe ratio of gas pressure to air pressure at low-fire rate can be changed by adjusting the zero point setting N By turning the adjusting screw ldquoNrdquo the force of the zero point spring and thus the zero point is changed by plusmn 15 mbar (06 WC) see page 34 (Project planning information)The high-fire rate is set by turning the adjusting screw ldquoVrdquo until the required flue gas values are achieved see page 34 (Project planning information) The ratio of gas pressure to air pressure can be set from 061 to 31The settings N and V influence each other and the adjustment process must be repeated if necessaryThe outlet pressure pd is applied to the servo diaphragm via the internal feedback The combustion chamber control pres-sure psc is transmitted to the space under the air and servo diaphragms via an impulse lineThe pressure differential psa - psc is achieved on the air diaphragm and the pressure differential pd - psc on the servo diaphragm This ensures that pressure fluctuations in the combustion cham-ber can be compensated The flue gas values remain constant in the case of fluctuations in the combustion chamber pressure (pd - psc) = (psa - psc) times V + N

Function

pdpsc

psa

Air diaphragm

Transmission ratio V

Zero point setting N zero point spring

Internalfeedback

Adjustment diaphragm

Servo diaphragm

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 19

1 COM

2 NO

3 NC

3 1 5 Pressure regulator with gas solenoid valve VAx S position indicator with visual indicatorOpening when the pressure regulator is opened the posi-tion indicator switches The visual indicator is activated The ldquoopenrdquo signal is marked in red The double valve seat opens to release the volume of gasClosing the pressure regulator VAx is disconnected from the voltage supply and the closing spring presses the double valve disc on to the valve seat The position indicator is actuated The visual indicator is white for ldquoclosedrdquoThe actuator cannot be rotated on a pressure regulator with a position indicator and a visual indicatorNOTE NFPA 86 ndash the following must be taken into account as soon as the capacity of the pilot or main burner exceeds 117 kW (400000 BTUh) safety shut-off valve VASS must be fitted with a proof of closure overtravel switch with a visual position indicator and the burner-side pressure regulator with gas solenoid valve VAxS must also be fitted with a position indicator with visual indicator The closed position can be verified using the proof of closure switch of the gas solenoid valve VASS

Function

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 20

3 2 AnimationThe interactive animation shows the function of the valVario controls VADVAGVAHVAVClick on the picture The animation can be controlled using the control bar at the bottom of the window (as on a DVD player) To play the animation you will need Adobe Reader 7 or a newer version If you do not have Adobe Reader on your system you can download it from the Internet

Go to wwwadobecom click on ldquoAdobe Readerrdquo at the bottom of the page and follow the instructionsIf the animation does not start to play you can download it from the document library (wwwdocuthekcom) as an inde-pendent application

Function

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 21

3 3 Connection diagramWiring to EN 60204-1Connection diagram for VAxS with position indicator ndash see page 19 (Pressure regulator with gas solenoid valve VAxS position indicator with visual indicator)

3 3 1 VAx with M20 cable gland

L1 (+)

N (ndash)

3 3 2 VAx with plug

1 = N (-)

2 = L1 (+)

3 3 3 VAS with VADVAGVAHVAV with M20 cable glandL1V1 (+)

N (-)

L1V2 (+)

3 3 4 VAS with VADVAGVAHVAV with plug2 = L1V1 (+)

1 = N (-)

3 = L1V2 (+)

Function

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 22

4 Replacement possibilities for MODULINE pressure regulators with gas solenoid valve4 1 GVS GVI GVIB GVR and GVRH are to be replaced by VAD VAG VAG+VAS VAH and VAV

Type TypeGVS Pressure regulator with gas solenoid valve Pressure regulator with gas solenoid valve VADGVI Airgas ratio control with gas solenoid valve Airgas ratio control with gas solenoid valve VAG

GVIB Airgas ratio control with gas solenoid valve and bypass valve

Airgas ratio control with gas solenoid valve and bypass valve VAG+VAS

GVRH Flow rate regulator with gas solenoid valve Flow rate regulator with gas solenoid valve VAHGVR Variable airgas ratio control with gas solenoid valve Variable airgas ratio control with solenoid valve VAV115125 Flange 38 Size 115

Size 125 on request

115125 Flange frac12 Size 115

Size 125 Size 1 DN 15 115

115125 Flange frac34 Size 115

Size 125 Size 1 DN 20 120

115125 Flange 1 Size 115

Size 125 Size 1 DN 25 125

232240 Flange 1 Size 232

Size 240 on request

232240 Flange 1frac12 Size 232

Size 240 Size 2 DN 40 240

350 Flange 1frac12 Size 350 on request350 Flange 2 Size 350 Size 3 DN 50 350ML MODULINE + Rp internal thread connection fl anges Rp internal thread RTML MODULINE + NPT internal thread connection fl anges NPT internal thread N01 pu max 100 mbar (15 psig) pu max 500 mbar (7 psig) 02 200 mbar (3 psig) 500 mbar (7 psig)

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 23

Replacement possibilities for MODULINE pressure regulators with gas solenoid valve gt GVS GVI GVIB GVR and GVRH are to be replaced by VAD VAG VAG+VAS VAH and VAV

ContinuationType Type

Quick opening Quick opening NF1 Control ratio 11 Control ratio 11 K Mains voltage 24 V DC Mains voltage 24 V DC K

ndash 100 V AC PQ 120 V AC 120 V AC Q

ndash 200 V AC YT 220240 V AC 230 V AC W3 Electrical connection via terminals Electrical connection via terminals 6 Electrical connection via socket Electrical connection via socket 9 Metal terminal connection box Electrical connection via terminals S Position indicator Position indicator with visual indicator SG Position indicator for 24 V Position indicator for 24 V with visual indicator GM Suitable for biologically produced methane Suitable for biologically produced methane

Pressure test point at the inlet Pressure test point at the inlet and outlet Outlet pressure pd -25

Outlet pressure pd 25 ndash 25 mbar (1 ndash 10 WC)

2 ndash 90 mbar (08 ndash 36 WC) 20 ndash 50 mbar (8 ndash 20 WC) -5035 ndash 100 mbar (14 ndash 40 WC) -100Standard seat A

ExampleGVS 350ML01T3with Rp 2 connection flanges

ExampleVAD 350RNW-100A

with test points

= standard = available Pressure test points may be attached at the left- andor right-hand side Position indicator with visual indicator can be attached at the left- or right-hand side

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 24

∆p [i

nch

WC]

Qn [SCFH]100 400 600 4000 60001000 200020 30 40 50 200 3006015 80

1

08

1

2

3

4

56

8

10

20

30

40

5060

80

100

200

∆p [m

bar]

5

8

3

20

10

30

40

80

60

300

400

50

04 06 1 2 3 4 5 808 10 20 30 402

03 60 100 200

100

200

500

1

3

2

04 06 08 1 2 3 4 5 6 8 10 20 30 40

04 06 08 1 2 3 4 5 6 8 10

200

80 10020 3003

03Qn [m3h]

02

50 60 80 100

40 50 60

VAD

115

B

VAD

120

AVA

D 12

5A

P1P2

VAD

240

AVA

D 35

0A

= natural gas (ρ = 080 kgm3) = propane (ρ = 201 kgm3) = air (ρ = 129 kgm3)

The characteristic flow rate curves have been meas-ured with the specified flanges and a fitted strainer If two or more valves are combined the pressure loss of each additional valve drops by approx 5

metric imperial

Enter densityFlow rate Qn

Inlet pressure pu

Outlet pressure pd

Product RV v

Pressure loss ∆p

∆pmin

5 Flow rate5 1 Selection example for VADNatural gas Flow rate Qmax = 30 m3h Inlet pressure pu = 80 mbar Outlet pressure pd = 60 mbarThe desired control ratio from high-fire to low-fire rate is RV = 101High fire ∆p = pu - pd = 20 mbar Point P1Low fire Point P2 Qmin = 26 m3h at ∆p = 20 mbar RV = Qmax Qmin = 1151

Point P1 and point P2 must be within the working range of a unit size We recommend that you select the smallest size to achieve the best control properties

5 1 1 Calculate VAD

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 25

∆p [i

nch

WC]

Qn [SCFH]100 400 600 4000 60001000 200020 30 40 50 200 3006015 80

1

08

1

2

3

4

56

8

10

20

30

40

5060

80

100

200

∆p [m

bar]

5

8

3

20

10

30

40

80

60

300

400

50

04 06 1 2 3 4 5 808 10 20 30 402

03 60 100 200

100

200

500

1

3

2

04 06 08 1 2 3 4 5 6 8 10 20 30 40

04 06 08 1 2 3 4 5 6 8 10

200

80 10020 3003

03Qn [m3h]

02

50 60 80 100

40 50 60

= pd min lt 5 mbar

VAG

VxH

VAV

115

BVA

GV

xHV

AV 12

0A

VAG

VxH

VAV

125

A

P1

P2

VAG

VxH

VAV

240

AVA

GV

xHV

AV 3

50A

= natural gas (ρ = 080 kgm3) = propane (ρ = 201 kgm3) = air (ρ = 129 kgm3)

The characteristic flow rate curves have been meas-ured with the specified flanges and a fitted strainer If two or more valves are combined the pressure loss of each additional valve drops by approx 5

5 2 Selection example for VAG VAH VRH VAV Natural gas Flow rate Qmax = 30 m3h Inlet pressure pu = 80 mbar Outlet pressure pd max VAG = 60 mbarThe desired control ratio from high-fire to low-fire rate is RV = 101High fire ∆p = pu - pd max = 20 mbar Point P1Low fire pd min = pd max RV2 = 06 mbar Qmin = Qmax RV = 3 m3h ∆p = pu - pd min = 794 mbar Point P2 select VAG 120APoint P1 and point P2 must be within the working range of a unit size We recommend that you select the smallest size to achieve the best control properties

metric imperial

Enter densityFlow rate Qn

Inlet pressure pu

Outlet pressure pd

Product RV v

5 2 1 Calculate VAG VxH VAV

Pressure loss ∆p

∆pmin

Flow rate

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 26

∆p [i

nch

WC]

Qn [SCFH]100 400 600 4000 60001000 200020 30 40 50 200 3006015 80

1

08

1

2

3

4

56

8

10

20

30

40

5060

80

100

200

∆p [m

bar]

5

8

3

20

10

30

40

80

60

300

400

50

04 06 2 3 4 5 808 10 20 30 402

03 60 100 200

100

200

500

1

3

2

04 06 08 1 2 3 4 5 6 8 10 20 30 40

04 06 08 1 2 3 4 5 6 8 10

200

80 10020 3003

03Qn [m3h]

02

50 60 80 100

40 50 60

VAG

115

N

P1VAG

125

N

VAG

120

N

VAG

240

NP2

VAG

350

N

= natural gas (ρ = 080 kgm3) = propane (ρ = 201 kgm3) = air (ρ = 129 kgm3)

The characteristic flow rate curves have been meas-ured with the specified flanges and a fitted strainer If two or more valves are combined the pressure loss of each additional valve drops by approx 5

5 3 Selection example for zero governor VAG NNatural gas Flow rate Qmax = 30 m3h Inlet pressure pu = 20 mbar Outlet pressure pd = 0 mbar (atmospheric pressure)The desired control ratio from high-fire to low-fire rate is RV = 101High fire ∆p = pu - pd max = 20 mbar Point P1Low fire Point P2 Qmin = 24 m3h at ∆p = 20 mbar RV = Qmax Qmin = 1231Point P1 and point P2 must be within the working range of a unit size We recommend that you select the smallest size to achieve the best control properties

metric imperial

Enter densityFlow rate Qn

Inlet pressure pu

Outlet pressure pd

Product RV

5 3 1 Calculate VAG N

Pressure loss ∆p

∆pmin

Flow rate

v

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 27

6 Selection6 1 Selection table for pressure regulator with solenoid valve VAD

Accessories right Accessories left

Type1) T R N F N K P Q Y W S2) G2) R2) L2) M20

cab

le g

land

Plug

with

soc

ket

Plug

with

out s

ocke

t

-25-50 -100 A B Scre

w p

lug

Pres

sure

test

poi

nt

DG

17V

C 3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

Scre

w p

lug

Pres

sure

test

poi

nt

DG

17V

C 3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

VAD 115

VAD 120

VAD 125

VAD 240

VAD 350

= standard = available1) The following nominal inlet fl ange diameters are also available size 1 with nominal diameter DN 10 size 2 with nominal diameters DN 25 DN 32 and DN 50 size 3 with nominal diameters DN 40 and DN 652) Position indicator and bypasspilot gas valve cannot be fi tted together on the same side3) Specify the test point for inlet pressure pu or outlet pressure pdHelp for selecting the pressure regulator VAD can be found on the ProFi DVD wwwkromschroedercom Products DVD Product fi nder ldquoProFirdquo

Order exampleVAD 240RNW-100A

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 28

Selection

6 2 Type code for VADCode DescriptionVAD Pressure regulator with solenoid valve1 ndash 3 SizeT T-product10 ndash 65 Nominal inlet and outlet diameterRNF

Rp internal threadNPT internal thread

ISO fl angeN Quick opening quick closingKPQYW

Mains voltage 24 V DCMains voltage 100 V AC 5060 HzMains voltage 120 V AC 5060 HzMains voltage 200 V AC 5060 HzMains voltage 230 V AC 5060 Hz

SG

Position indicator with visual indicatorPosition indicator for 24 V with visual indicator

RL

Viewed from the right (in the direction of fl ow)Viewed from the left (in the direction of fl ow)

-25-50-100

Outlet pressure pd 25 ndash 25 mbar20 ndash 50 mbar

35 ndash 100 mbarAB

Standard valve seatReduced valve seat

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 29

Selection

6 3 Selection table for airgas ratio control with solenoid valve VAG flow rate regulators VAH VRH

Type1) T R N F N K P Q Y W S2) G2) R2) L2) M20

cab

le g

land

Plug

with

soc

ket

Plug

with

out s

ocke

t

A B E K A N Scre

w p

lug

Pres

sure

test

poi

ntD

G 1

7VC

3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

Scre

w p

lug

Pres

sure

test

poi

ntD

G 1

7VC

3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

VAG 115 VAG 120 VAG 125 VAG 240 VAG 350

VAH 115 VAH 120 VAH 125 VAH 240 VAH 350

VRH 115 VRH 120 VRH 125 VRH 240 VRH 350

= standard = available1) The following nominal inlet fl ange diameters are also available size 1 with nominal diameter DN 10 size 2 with nominal di-

ameters DN 25 DN 32 and DN 50 size 3 with nominal diameters DN 40 and DN 652) Position indicator and bypasspilot gas valve cannot be fi tted together on the same side3) Specify the test point for inlet pressure pu or outlet pressure pdHelp for selecting the regulators can be found on the ProFi DVD wwwkromschroedercom Products DVD Product fi nder ldquoProFirdquo

Order exampleVAG 240RNWAE

Accessories right Accessories left

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 30

Selection

6 4 Type code for VAG VAH VRHCode DescriptionVAGVAHVRH

Airgas ratio control with solenoid valveFlow rate regulator with solenoid valve

Flow rate regulator1 ndash 3 SizeT T-product15 ndash 50 Nominal inlet and outlet diameterRNF

Rp internal threadNPT internal thread

ISO fl angeN1) Quick opening quick closingK1)

P1)

Q1)

Y1)

W1)

Mains voltage 24 V DCMains voltage 100 V AC 5060 HzMains voltage 120 V AC 5060 HzMains voltage 200 V AC 5060 HzMains voltage 230 V AC 5060 Hz

S1)

G1)Position indicator with visual indicator

Position indicator for 24 V with visual indicatorRL

Viewed from the right (in the direction of fl ow)Viewed from the left (in the direction of fl ow)

AB

Standard valve seatReduced valve seat

EKAN

Connection kit for air control pressure psaVAG VAH VRH compression fi tting

VAG plastic hose couplingVAG VAH VRH NPT 18 adapter

VAG zero governor1) Only available for VAG VAV VAH

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 31

6 5 Selection table for variable airgas ratio control with solenoid valve VAVAccessories right Accessories left

Type1) T R N F N K P Q Y W S2) G2) R2) L2) M20

cab

le g

land

Plug

with

soc

ket

Plug

with

out s

ocke

t

A B E K A Scre

w p

lug

Pres

sure

test

poi

ntD

G 1

7VC

3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

Scre

w p

lug

Pres

sure

test

poi

ntD

G 1

7VC

3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

VAV 115

VAV 120

VAV 125

VAV 240

VAV 350

= standard = available1) The following nominal inlet fl ange diameters are also available size 1 with nominal diameter DN 10 size 2 with nominal diameters DN 25 DN 32 and DN 50 size 3 with nominal diameters DN 40 and DN 652) Position indicator and bypasspilot gas valve cannot be fi tted together on the same side3) Specify the test point for inlet pressure pu or outlet pressure pdHelp for selecting the variable airgas ratio control VAV can be found on the ProFi DVD wwwkromschroedercom

Products DVD Product fi nder ldquoProFirdquo

Order exampleVAV 240RNWAK

Selection

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 32

Selection

6 6 Type code for VAVCode DescriptionVAV Variable airgas ratio control with solenoid valve1 ndash 3 SizeT T-product15 ndash 50 Nominal inlet and outlet diameterRNF

Rp internal threadNPT internal thread

ISO fl angeN Quick opening quick closingKPQYW

Mains voltage 24 V DCMains voltage 100 V AC 5060 HzMains voltage 120 V AC 5060 HzMains voltage 200 V AC 5060 HzMains voltage 230 V AC 5060 Hz

SG

Position indicator with visual indicatorPosition indicator for 24 V with visual indicator

RL

Viewed from the right (in the direction of fl ow)Viewed from the left (in the direction of fl ow)

AB

Standard valve seatReduced valve seat

EKA

Connection kit for air control pressure psa and combus-tion chamber control pressure psc

compression fi ttingplastic hose coupling

NPT 18 adapter

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 33

Selection

6 7 AccessoriesModularly configurable withndash Screw plugsndash Pressure test pointsndash Pressure switch DGVC for inlet

andor outlet pressurendash Tightness control TCndash Bypasspilot gas valve VBY 8 for

size 1ndash Bypasspilot gas valve VAS 1For further information see page 37 (Accessories)

Position indicator

Plug with socket

Plug

Screwplugs

Pressuretest points

Pressure switch DGC Tightness

control TC

Bypasspilot gas valve VBY 8 for size 1

Bypasspilot gas valve VAS 1

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 34

7 Project planning informationDo not store or install the unit in the open airThe inlet pressure pu and the outlet pressure pd can be meas-ured on both sides of the valve body To increase the control accuracy an external impulse line can be connected instead of the pressure test point pd

VAD

pu

pd

(psa)

VAGpd

pu

psa

psa

VAD measurement point for the gas outlet pressure pd on the regulator body A combustion chamber control line (psc) can be connected to connection psa for maintaining a constant burner capacityVAG additional measurement point for the air control pressure psa on the regulator body

VAV

psapsc

pu

pd

VAH VRH

pu

pd-

pdpsa-

psa

VAV measurement point for the outlet pressure pd on the regulator bodyVAH additional measurement points for the outlet pressure pd- and the air control pressure psapsa- on the regulator body

7 1 Installation

GFK

VAGVAH

GFKVAD

Sealing material and thread cuttings must not be allowed to get into the valve housing Install a filter upstream of every system

gt20 mmgt0 79

The unit must not be in contact with masonry Minimum clear-ance 20 mm (079 inches)Ensure that there is sufficient space for installation and ad-justment

le +100 degCle +212 degF

The solenoid body heats up during operation ndash depending on ambient temperature (max 60degC140degF) and intrinsic heating (approx 40degC104degF)

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 35

In the case of double solenoid valves the position of the con-nection box can only be changed by removing the actuator and reinstalling it offset by 90deg or 180deg

If more than three valVario controls are installed in line the controls must be supported

The seals in some gas compression fittings are approved for temperatures of up to 70degC (158degF) This temperature limit will not be exceeded if the flow through the pipe is at least 1 msup3h (3531 SCFH) of gas and the maximum ambient temperature is 50degC (122degF)

7 1 1 Installation position

pu ge 80 mbar(80 hPa32 WC)

VAD VAG VAH VRH VAV

In humid environments black solenoid actuator in the vertical upright position only

VAD VAG VAH VRH black solenoid actuator in the vertical upright position or tilted up to the horizontal not upside downVAG VAH horizontal position only if pu ge 80 mbar (32 WC))VAV installation in the vertical position only black solenoid actuator in the vertical upright positionTo ensure that the airgas ratio control VAG the flow rate regulator VAH VRH or the variable airgas ratio control VAV can react quickly when the load is changed the impulse line for the air control pressure psa and for VAV the impulse line for the combustion chamber control pressure psc should be kept as short as possible The tube internal diameter for the impulse line must always be ge 39 mm (015)

VAH VRHIt is not permitted to install a gas solenoid valve VAS down-stream of flow rate regulator VAH VRH and upstream of fine-adjusting valve VMV The VAS would no longer be able to perform its function as a second safety valve if installed in the above-mentioned position

M

VMV

VAH

VASVAS

pd-

psa-psa

VMV

VAH pd-

psa-psa

The measuring orifice in the air line for impulse lines psa and psa- must always be installed downstream of the air control valve

Project planning information gt Installation

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 36

VAVThe impulse line for the combustion chamber control pres-sure psc must be fitted so that no condensation can enter the pressure regulator but rather flows back into the combustion chamber

7 2 Setting the low-fire rate on VAG VAH VRH VAV

-10 +05-05

ndash

+1

-15

mbar

+15

06

1 152

3

N V

+ +ndash

+30 -15+15

ndash

-3

+5

mbar

-5

N

+

VAG VAH VRH VAV

If the burner operates at low-fire rate the gasair mixture can be changed using the parallel shift of the characteristic curve by turning the adjusting screw ldquoNrdquoAdjusting range at low fire VAG VAH VRH -5 to +5 mbar (-195 to +195 WC) VAV -15 to +15 mbar (-06 to +06 WC)

7 3 Setting the high-fire rate on VAVTo set the high-fire rate the transmission ratio is changed us-ing the adjusting screw ldquoVrdquo until the required flue gas values are achievedTransmission ratio V = pdpsa = 061 to 31The settings N and V can influence each other and must be repeated if necessary

+N+V

-V

-N

VAV

psa [mbar]

p d [m

bar]

7 3 1 CalculationWith no connection to the combustion chamber control pres-sure psc pd = V times psa + NWith connection to the combustion chamber control pressure psc (pd - psc) = V times (psa - psc) + N

Project planning information

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 37

pu pd

21579

4836

085310

189

142

8 Accessories8 1 Gas pressure switch DG VC for VAx VRHType Adjusting range [mbar]DG 17VC 2 to 17DG 40VC 5 to 40DG 110VC 30 to 110DG 300VC 100 to 300

Scope of delivery 1 times pressure switch for gas 2 times retaining screws 2 times sealing rings

8 2 Gas pressure switch DG VCT for VAx T VRH TType Adjusting range [WC]DG 17VCT 08 to 68DG 40VCT 2 to 16DG 110VCT 12 to 44DG 300VCT 40 to 120

Scope of delivery 1 times gas pressure switch with AWG 18 connection wires 2 times retaining screws 2 times sealing ringsMonitoring the inlet pressure pu the electrical plug of the pressure switch for gas points towards the inlet flangeMonitoring the outlet pressure pd the electrical plug of the pressure switch for gas points towards the outlet flange

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 38

A BC

D

FE

ACD

F

B

E

8 3 Bypass valvepilot gas valve VAS 18 3 1 VAS 1 attached to VADVAGVAHVAV 1Scope of delivery A 1 times bypasspilot gas valve VAS 1 B 4 times O-rings C 4 times double nuts D 4 times connection parts E 1 times mounting aidBypass valve VAS 1 F 2 times connection pipes if the bypass valve has a blind flange

at the outlet sidePilot gas valve VAS 1 F 1 times connection pipe 1 times sealing plug if the pilot gas valve

has a threaded flange at the outlet side

Accessories

8 3 2 VAS 1 attached to VADVAGVAHVAV 2 VADVAGVAHVAV 3Scope of delivery A 1 times bypasspilot gas valve VAS 1 B 4 times O-rings C 4 times spacer sleeves D 4 times connection parts E 1 times mounting aidBypass valve VAS 1 F 2 times connection pipes if the bypass valve has a blind flange

at the outlet sidePilot gas valve VAS 1 F 1 times connection pipe 1 times sealing plug if the pilot gas valve

has a threaded flange at the outlet side

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 39

2

3

456

810

20

30

405060

80100

∆p [m

bar]

005 01 02 03 05 08 1 2 3 4 51

3

2

Qn [m3h]

1

01

02

03

0405

08

003

002

6 8 10

005 01 02 03 05 08 1 2 3 4 5003 6 8 10

20

005 01 02 03 05 08 1 2 3 4 5003 6 8 10 20

30

∆p [i

nch

WC]

1

2

3

456

810

20

30

40

04

004

006

00801

02

03

0506

08

Qn [SCFH]10 40 60 100 200 3001 500 10002 3 4 5

120 306 8

21 3 4 5 6 7 8 910

8 3 3 Flow rate

The characteristic flow rate curves have been measured for bypass valve VAS 1 with connection pipe diameter 1 to 10 mm (004 to 04) and for the pilot gas valve with 10 mm (04) connection pipe

Bypass valve connection pipe diameter [mm]

Pilo

t gas

val

ve 1

0 m

m (0

4)

conn

ectio

n pi

pe d

iam

eter

Accessories gt Bypass valvepilot gas valve VAS 1

= natural gas (ρ = 080 kgm3) = propane (ρ = 201 kgm3) = air (ρ = 129 kgm3)

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 40

Accessories

8 4 Bypass valvepilot gas valve VBY 8 for VADVAGVAHVAV 1

B

C

AVBY 8

VAx 1

55

(217)40(157)

70 (276)

80(315)

Rp frac14(pilot gas valve)

For mounting on VAD VAG VAH VAV 1 and double solenoid valve VCD VCG VCH VCV 1

8 4 1 Scope of delivery VBY 8I as bypass valveA 1 times bypass valve VBY 8IB 2 times retaining screws with 4 times O-rings both retaining screws

have a bypass orificeC 1 times grease for o-rings

8 4 2 Scope of delivery VBY 8R as pilot gas valveA 1 times pilot gas valve VBY 8RB 2 times retaining screws with 5 x O-rings one retaining screw

has a bypass orifice (2 x O-rings) the other does not (3 x O-rings)

C 1 times grease for O-rings

8 4 3 SelectionType I R W Q K 6L -R -L E B D 05

VBY 8

Order exampleVBY 8RW6L-LED

8 4 4 Type codeCode DescriptionVBY Gas solenoid valve8 Nominal sizeIR

For internal gas pick-up as bypass valveFor external gas pick-up as pilot gas valve

KQW

Mains voltage 24 V DC Mains voltage 120 V AC 5060 HzMains voltage 230 V AC 5060 Hz

6L Electrical connection via plug and socket with LED-R-L

Attachment side of main valve right-hand sideAttachment side of main valve left-hand side

EB

Attached to the VAxEnclosed (separate packing unit)

05D

Nozzle diameter = 05 mm (002)Flow adjustment

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 41

2

01

02

03

05

081

3

456

810

20

30

405060

80100

∆p [m

bar]

1

3

201 02 03 05 1 2 3001 003 4

Qn [m3h]

02 03 05 1 2

01 02 05

002 006

002

002 006 1

0010006 005 01

001

0003

0006 2 3

VBY 8DVBY 805

∆p [i

nch

WC]

1

2

3

456

810

20

30

40

040506

08

1

Qn [SCFH]10 40 60 1005 2081 2 30402

01

02

03

004005006

008

Adjusting range

8 4 5 Flow rateVBY 8 D

+

-

The flow rate can be set by turning the flow rate restrictor (4 mm016 Allen screw) frac14 of a turn Flow rate 10 to 100

VBY 8 05The flow is routed through a 05 mm (002) nozzle and thus has a fixed characteristic flow rate curve Adjustment is not possible

8 4 6 Technical dataInlet pressure pu max 500 mbar (7 psig)Ambient temperature 0 to +60degC (32 to 140degF) no condensation permittedStorage temperature 0 to +40degC (32 to 104degF) no condensation permittedPower consumption 24 V = 8 W 120 V = 8 W 230 V = 95 WEnclosure IP 54

Accessories gt Bypass valvepilot gas valve VBY 8 for VADVAGVAHVAV 1

= natural gas (ρ = 080 kgm3) = propane (ρ = 201 kgm3) = air (ρ = 129 kgm3)

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 42

TC 116VB C

56(22)

49(193)

27(106)

A

A

VCx 1 VCx 2VCx 3

8 5 Tightness control TC 116Vfor VAx 1 ndash 3An adapter plate is required to attach the tightness control to the right- or left-hand side of the pressure regulator with gas solenoid valveScope of delivery A 1 times adapter plate B 2 times O-rings C 2 times retaining screwsFor attachment to left-hand side Order No 74922391 right-hand side Order No 74921995

8 6 Pressure test pointsTest points to check the inlet pressure pu and outlet pressure pdScope of delivery 1 x pressure test points with 1 x profiled sealing rings Order No 74923390

8 7 Cable gland setWhen wiring a double solenoid valve with pressure regula-tor VCx the connection boxes are to be connected using a cable gland setThe cable gland set can only be used if the connection boxes are at the same height and on the same side and if both valves are equipped either with or without a proof of closure switchVA 1 Order No 74921985 VA 2 Order No 74921986 VA 3 Order No 74921987

Accessories

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 43

A B

D

C

Accessories

8 9 Differential pressure orifice

Size PipeDN

Differential pressure orifi cewith outlet dia

1 15 17 mm 0671 20 25 mm 0981 25 30 mm 1182 40 46 mm 1813 50 58 mm 228

If pressure regulator VADVAGVAV 1 is retrofitted upstream of gas solenoid valve VAS 1 a DN 25 differential pressure orifice with outlet opening d = 30 mm (118) must be inserted at the outlet of the pressure regulatorIn the case of pressure regulator VAx 115 or VAx 120 the DN 25 differential pressure orifice must be ordered separately and retrofitted Order No 74922240

8 8 Seal set VA 1 ndash 3VA 1 Order No 74921988 VA 2 Order No 74921989 VA 3 Order No 74921990Scope of deliveryA 1 times double block seal B 2 times O-rings (flange) C 2 times O-rings (pressure switch) for pressure test pointscrew plug D 2 times sealing rings (flat sealing) and 2 times profiled sealing rings

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 44

BA

C

pd-

8 11 Attachment blockFor locked installation of pressure gauge and other acces-soriesScope of delivery A 1 times attachment block B 2 times self-tapping screws for installation C 2 times O-rings

Accessories

8 10 Retaining frameIn the event that a pressure regulator VAx is installed at a later point upstream of a gas solenoid valve VAS a measur-ing orifice VMO or a fine-adjusting valve VMV the retaining frame must be fitted at the inlet of the second device in order to fasten the differential pressure orifice at the regulator outlet Order the retaining frame separatelyRetaining frame for Size 1 Order No 74923029 Size 2 Order No 74923030 Size 3 Order No 74923031

8 12 Gas control lineFine-adjusting valve VMV can be installed on the flow rate regulator VAH for fine adjustment of the gas flow rateThe gas control line for gas outlet pressure pd- is available with 2 18 compression fittingsSize 1 Order No 74924458 Size 2 Order No 74924459

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 45

8 13 Measuring orifice VMOThe measuring orifice VMO is designed to reduce the gas and air flow rates and is installed downstream of the valVario control The measuring orifice is available with Rp internal thread (NPT internal thread) or flange to ISO 7005See wwwdocuthekcom Elster Kromschroumlder Krom-schroumlder LBE Products 03 Valves and butterfly valves valVario accessories Type of document Technical Informa-tion VMO

Accessories

8 14 Filter module VMFUsing the filter module VMF the gas flow upstream of the gas solenoid valve VAS and the airgas ratio control is cleaned The filter module is available with Rp internal thread (NPT internal thread) or flange to ISO 7005 and can also be supplied with fitted pressure switch as an optionSee wwwdocuthekcom Elster Kromschroumlder Krom-schroumlder LBE Products 03 Valves and butterfly valves valVario accessories Type of document Technical Informa-tion VMF

8 15 Fine-adjusting valve VMVThe flow rate is set using the fine-adjusting valve VMV The fine-adjusting valve is available with Rp internal thread (NPT internal thread) or flange to ISO 7005See wwwdocuthekcom Elster Kromschroumlder Krom-schroumlder LBE Products 03 Valves and butterfly valves valVario accessories Type of document Technical Infor-mation VMV

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 46

9 Technical dataGas types natural gas LPG (gaseous) biologically produced methane (max 01 -by-vol H2S) or clean air other gases on request The gas must be clean and dry in all temperature conditions and must not contain condensateCE and FM approved UL listed max inlet pressure pu 10 ndash 500 mbar (4 ndash 200 WC) FM approved (230 V AC 120 V AC 24 V DC) non opera-tional pressure 700 mbar (10 psig)ANSICSA approved (230 V AC 120 V AC 24 V DC) up to 350 mbar (5 psig)Opening time of the solenoid valve quick opening le 05 s Closing time quick closing lt 1 sMedium and ambient temperatures -20 to +60degC (-4 to +140degF) no condensation permittedStorage temperature -20 to +40degC (-4 to +104degF)Enclosure IP 65Valve housing aluminium valve seal NBRConnection flanges with internal thread Rp to ISO 7-1 NPT to ANSIASMESafety valve Class A to EN 161 Factory Mutual Research Class 7400 Process Control Valves (230 V AC 120 V AC 24 V DC) ANSI Z2121 and CSA 65 ANSI Z2118 and CSA 63Control class A to EN 88-1Control range up to 101

Mains voltage 230 V AC +10-15 5060 Hz 200 V AC +10-15 5060 Hz 120 V AC +10-15 5060 Hz 100 V AC +10-15 5060 Hz 24 V DC plusmn20Duty cycle 100Power factor of the solenoid coil cos φ = 09Power consumption

Type Voltage Power

VAx 1

24 V DC 25 W ndash100 V AC 25 W (26 VA)120 V AC 25 W (26 VA)200 V AC 25 W (26 VA)230 V AC 25 W (26 VA)

VAx 2 VAx 3

24 V DC 36 W ndash100 V AC 36 W (40 VA)120 V AC 40 W (44 VA)200 V AC 40 W (44 VA)230 V AC 40 W (44 VA)

VBY24 V DC 8 W ndash

120 V AC 8 W ndash230 V AC 95 W ndash

Cable gland M20 times 15Electrical connection cable with max 25 mm2 (AWG 12) or plug with socket to EN 175301-803

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 47

Position indicator contact rating

Type Voltage Min current(resistive load)

Max current(resistive load)

VAxS VCxS 12 ndash 250 V AC 5060 Hz 100 mA 3 AVAxG VCxG 12 ndash 30 V DC 2 mA 01 A

Position indicator switching frequency max 5 times per minute

Switching current [A]

Switching cyclescos φ = 1 cos φ = 06

01 500000 50000005 300000 250000

1 200000 1000003 100000 ndash

Limited to max 200000 cycles for heating systems

9 1 VADOutlet pressure pd VAD-25 25 ndash 25 mbar (1 ndash 10 WC) VAD-50 20 ndash 50 mbar (8 ndash 20 WC) VAD-100 35 ndash 100 mbar (14 ndash 40 WC)Combustion chamber control pressure psc (connection psa)

-20 to +20 mbar (-78 to +78 WC)

VAD

pu

pd

(psa)

9 2 VAGOutlet pressure pd 05 ndash 100 mbar (02 ndash 40 WC)Air control pressure psa 05 ndash 100 mbar (02 ndash 40 WC)

Adjusting range at low fire plusmn5 mbar (plusmn2 WC)Transmission ratio of gas to air 11The inlet pressure must always be higher than the air control pressure psa + pressure loss ∆p + 5 mbar (2 WC)

VAGpd

pu

psa

psa

VAGK 1 x 18 coupling for plastic hose (internal dia 39 mm (015) external dia 61 mm (024)) or VAGE 1 x 18 compression fitting for 6 times 1 tube or VAGA 1 x NPT 18 adapter or VAGN zero governor with breathing orifice

9 3 VAH VRHAir control pressure psa 06 ndash 100 mbar (024 ndash 40 WC) Differential air pressure ∆psa (psa - psa-) 06 ndash 50 mbar (024 ndash 197 WC) Differential gas pressure ∆pd (pd - pd-) 06 ndash 50 mbar (024 ndash 197 WC)Transmission ratio of gas to air 11The inlet pressure must always be higher than the differen-tial air pressure ∆psa + pressure loss ∆p + max gas pres-sure on burner + 5 mbar (2 WC)Adjusting range at low fire plusmn5 mbar (plusmn2 WC)

Technical data

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 48

VAHVRH

pd-

pu

psa-

psa

Connection of the air control pressure psaVAHE VRHE 3 x 18 compression fitting for 6 times 1 tube or VAHA VRHA 3 x NPT 18 adapter

9 4 VAVOutlet pressure pd 05 ndash 30 mbar (02 ndash 117 WC)Air control pressure psa 04 ndash 30 mbar (015 ndash 117 WC)Combustion chamber control pressure psc

-20 to +20 mbar (-78 to +78 WC)Min control pressure differential psa - psc 04 mbar (015 WC)Min pressure differential pd - psc 05 mbar (02 WC)Adjusting range at low fire plusmn15 mbar (plusmn06 WC)Transmission ratio of gas to air 061 to 31The inlet pressure pu must always be higher than the air control pressure psa times transmission ratio V + pressure loss ∆p + 15 mbar (06 WC)

pu

pd psapsc

VAV

VAVK 2 x plastic hose couplings (internal dia 39 mm (015) external dia 61 mm (024)) or VAVE 2 x 18 compression fitting for 6 times 1 tube or VAVA 2 x NPT 18 adapter

Technical data

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 49

9 5 Safety-specific characteristic values for VAx 1 ndash 3For SILSuitable for Safety Integrity Level SIL 1 2 3

Diagnostic coverage DC 0

Type of subsystem Type A to EN 61508-2 74312

Operating mode High demand mode pursu-ant to EN 61508-4 3512

For PLSuitable for Performance Level PL a b c d e

Category B 1 2 3 4Common cause failure CCF gt 65Application of essential safety requirements Satisfied

Application of tried-and-tested safety requirements Satisfied

For SIL and PL

B10d value

Operating cyclesVAD VAG VAV VAH 1 10094360VAD VAG VAV VAH 2 8229021VAD VAG VAV VAH 3 6363683

Hardware fault tolerance (1 valve) HFT 0

Hardware fault tolerance (2 valves) HFT 1

Safe failure fraction SFF gt 90Fraction of undetected com-mon cause failures β ge 2

Max service life under operating conditions10 years after date of production plus max 12 year in stor-age prior to first use or once the given number of operating cycles has been reached depending on which is achieved firstThe devices are suitable for single-channel systems (HFT = 0) up to SIL 2PL d and up to SIL 3PL e when two re-dundant valves are installed in a double-channel architecture (HFT = 1) provided that the complete system complies with the requirements of EN 61508ISO 13849

For a glossary of terms see page 53 (Glossary)

Technical data

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 50

nop 1hnop 1a

sB10d

T10d aPFHD (1 VAx) 1h

PFHD (2 VAx) 1h

PFDavg (1 VAx)

PFDavg (2 VAx)

Technical data gt Safety-specific characteristic values for VAx 1 ndash 3

9 5 1 Determining the PFHD value the λD value and the MTTFd value

PFHD = λD = x nop= 1MTTFd

01B10d

PFDavg = x λD x 24 x 365 x T10d 12

Type

Cycle time

suitable for

suitable for

PFHD = Probability of dangerous failure (HDM = high de-mand mode) [1hour]PFDavg = Average probability of dangerous failure on de-mand (LDM = low demand mode)λD = Mean dangerous failure rate [1hour]MTTFd = Mean time to dangerous failure [hours]nop = Demand rate (mean number of annual operations) [1hour]

9 5 2 Calculating the PFHD and PFDavg

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 51

VAD VAG VAH VAV

H1

Rp frac14(NPT frac14)

H2

E

LF

F

H4

H3

B

VAxS VAxF

L2G

G

Technical data

9 6 Dimensions

Type

Connec-tion Dimensions

WeightRpNPT DN

L L2 E F G H1 H2 H3 H4 Bmm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch kg lbs

VAx 115 12 15 75 29 ndash ndash 75 29 15 06 ndash ndash 143 56 82 32 161 63 117 46 97 38 18 40VAH 115 12 15 75 29 ndash ndash 75 29 15 06 ndash ndash 143 56 100 39 161 63 135 53 97 38 2 44VAx 120 34 20 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 82 33 161 63 117 46 97 38 19 42VAH 120 34 20 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 100 39 161 63 135 53 97 38 21 46VAx 125 1 25 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 82 33 161 63 117 46 97 38 19 42VAH 125 1 25 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 100 39 161 63 135 53 97 38 21 46VAx 240 112 40 128 50 200 79 85 33 29 11 66 26 170 67 112 44 191 75 162 64 125 49 44 97VAH 240 112 40 128 50 200 79 85 33 29 11 66 26 170 67 132 52 191 75 182 72 125 49 47 104VAx 350 2 50 155 61 230 91 85 33 36 14 74 29 180 70 135 53 201 79 196 77 160 63 61 134VAH 350 2 50 155 61 230 91 85 33 36 14 74 29 180 70 156 61 201 79 217 85 160 63 64 141

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 52

10 Converting unitssee wwwadlatusorg

11 Maintenance cyclesAt least once per annum at least twice per annum for biologi-cally produced methaneIf the flow rate drops clean the strainer

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 53

12 Glossary12 1 Diagnostic coverage DCMeasure of the effectiveness of diagnostics which may be determined as the ratio between the failure rate of detected dangerous failures and the failure rate of total dangerous failuresNOTE Diagnostic coverage can exist for the whole or parts of a safety-related system For example diagnostic cover-age could exist for sensors andor logic system andor final elements Unit see EN ISO 13849-12008

12 2 Mode of operationHigh demand mode or continuous modeOperating mode where the frequency of demands for opera-tion made on a safety-related system is greater than one per year or greater than twice the proof-test frequencysee EN 61508-42008

12 3 CategoryClassification of the safety-related parts of a control system in respect of their resistance to faults and their subsequent behaviour in the fault condition and which is achieved by the structural arrangement of the parts fault detection andor by their reliability see EN ISO 13849-12008

12 4 Common cause failure CCFFailures of different items resulting from a single event where these failures are not consequences of each othersee EN ISO 13849-12008

12 5 Fraction of undetected common cause failures β Fraction of undetected failures of redundant components due to a single event whereby these failures are not based on mutual causesNOTE β is expressed as a fraction in the equations and as a percentage elsewheresee EN 61508-62010

12 6 B10d valueMean number of cycles until 10 of the components fail dan-gerouslysee EN ISO 13849-12008

12 7 T10d valueMean time until 10 of the components fail dangerouslysee EN ISO 13849-12008

12 8 Hardware fault tolerance HFTA hardware fault tolerance of N means that N + 1 is the mini-mum number of faults that could cause a loss of the safety functionsee IEC 61508-22010

12 9 Mean dangerous failure rate λD Mean rate of dangerous failures during operation time (T10d) Unit 1hsee EN ISO 13849-12008

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 54

12 10 Safe failure fraction SFFFraction of safe failures related to all failures which are as-sumed to appearsee EN 13611A22011

12 11 Probability of dangerous failure PFHD Value describing the likelihood of dangerous failure per hour of a component for high demand mode or continuous mode Unit 1hsee EN 13611A22011

12 12 Mean time to dangerous failure MTTFd Expectation of the mean time to dangerous failuresee EN ISO 13849-12008

12 13 Demand rate nop Mean number of annual operationssee EN ISO 13849-12008

12 14 Average probability of dangerous failure on demand PFDavg (LDM = 1 ndash 10 switching cyclesyear)Average probability of a dangerous failure of the safety function on demand (LDM = low demand mode)see EN 61508-6

Glossary

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415

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Remarks

(Adobe Reader 7 or higher required) wwwadobecom

Elster GmbH Postfach 2809 middot 49018 Osnabruumlck Strotheweg 1 middot 49504 Lotte (Buumlren) GermanyT +49 541 1214-0 F +49 541 1214-370 infokromschroedercomwwwkromschroedercom

The current addresses of our international agents are available on the Internetwwwkromschroederdeindexphpid=718ampL=1

We reserve the right to make technical modifications in the interests of progressCopyright copy 2015 Elster GmbH All rights reserved

Contact

Feedback

0325

0530

  • Pressure regulators with solenoid valve VAD VAG VAV VAH
  • Flow rate regulator VRH
  • Pressure regulators with double solenoid valve VCD VCG VCV VCH
  • Contents
  • 1 Application
    • 11 Examples of application
      • 111 Constant pressure control
      • 112 Constant pressure control with two gas solenoid valves
      • 113 Constant pressure control with max pressure switch
      • 114 Constant pressure control with non-controlled pilot gas outlet
      • 115 Modulating control
      • 116 Modulating control with two gas solenoid valves
      • 117 Modulating control with two gas solenoid valves and inlet pressure switch
      • 118 HighLow control
      • 119 Zero pressure control
      • 1110 Staged flow rate control
      • 1111 Continuous or staged flow rate control
      • 1112 Modulating control with variable airgas ratio control with gas solenoid valve
      • 1113 Modulating control in residential heat generation
          • 2 Certification
          • 3 Function
            • 31 VAD VAG VAH VRH VAV
              • 311 Pressure regulator for gas VAD
              • 312 Airgas ratio control VAG
              • 313 Flow rate regulators VAH VRH
              • 314 Variable airgas ratio control VAV
              • 315 Pressure regulator with gas solenoid valve VAxS position indicator with visual indicator
                • 32 Animation
                • 33 Connection diagram
                  • 331 VAx with M20 cable gland
                  • 332 VAx with plug
                  • 333 VAS with VADVAGVAHVAV with M20 cable gland
                  • 334 VAS with VADVAGVAHVAV with plug
                      • 4 Replacement possibilities for MODULINE pressure regulators with gas solenoid valve
                        • 41 GVS GVI GVIB GVR and GVRH are to be replaced by VAD VAG VAG+VAS VAH and VAV
                          • 5 Flow rate
                            • 51 Selection example for VAD
                              • 511 Calculate VAD
                                • 52 Selection example for VAG VAH VRH VAV
                                  • 521 CalculateVAG VxHVAV
                                    • 53 Selection example for zero governor VAGN
                                      • 531 Calculate VAGN
                                          • 6 Selection
                                            • 61 Selection table for pressure regulator with solenoid valve VAD
                                            • 62 Type code for VAD
                                            • 63 Selection table for airgas ratio control with solenoid valve VAG flow rate regulators VAH VRH
                                            • 64 Type code for VAG VAH VRH
                                            • 65 Selection table for variable airgas ratio control with solenoid valve VAV
                                            • 66 Type code for VAV
                                            • 67 Accessories
                                              • 7 Project planning information
                                                • 71 Installation
                                                  • 711 Installation position
                                                    • 72 Setting the low-fire rate on VAG VAH VRH VAV
                                                    • 73 Setting the high-fire rate on VAV
                                                      • 731 Calculation
                                                          • 8 Accessories
                                                            • 81 Gas pressure switch DGVC for VAx VRH
                                                            • 82 Gas pressure switch DGVCT for VAxT VRHT
                                                            • 83 Bypass valvepilot gas valve VAS 1
                                                              • 831 VAS 1 attached to VADVAGVAHVAV 1
                                                              • 832 VAS 1 attached to VADVAGVAHVAV 2 VADVAGVAHVAV 3
                                                              • 833 Flow rate
                                                                • 84 Bypass valvepilot gas valve VBY 8 for VADVAGVAHVAV 1
                                                                  • 841 Scope of delivery VBY 8I as bypass valve
                                                                  • 842 Scope of delivery VBY 8R as pilot gas valve
                                                                  • 843 Selection
                                                                  • 844 Type code
                                                                  • 845 Flow rate
                                                                  • 846 Technical data
                                                                    • 85 Tightness control TC 116V
                                                                    • 86 Pressure test points
                                                                    • 87 Cable gland set
                                                                    • 88 Seal set VA 1thinspndashthinsp3
                                                                    • 89 Differential pressure orifice
                                                                    • 810 Retaining frame
                                                                    • 811 Attachment block
                                                                    • 812 Gas control line
                                                                    • 813 Measuring orifice VMO
                                                                    • 814 Filter module VMF
                                                                    • 815 Fine-adjusting valve VMV
                                                                      • 9 Technical data
                                                                        • 91 VAD
                                                                        • 92 VAG
                                                                        • 93 VAH VRH
                                                                        • 94 VAV
                                                                        • 95 Safety-specific characteristic values for VAx 1thinspndashthinsp3
                                                                          • 951 Determining the PFHD value the λD value and the MTTFd value
                                                                          • 952 Calculating the PFHD and PFDavg
                                                                            • 96 Dimensions
                                                                              • 10 Converting units
                                                                              • 11 Maintenance cycles
                                                                              • 12 Glossary
                                                                                • 121 Diagnostic coverage DC
                                                                                • 122 Mode of operation
                                                                                • 123 Category
                                                                                • 124 Common cause failure CCF
                                                                                • 125 Fraction of undetected common cause failures β
                                                                                • 126 B10d value
                                                                                • 127 T10d value
                                                                                • 128 Hardware fault tolerance HFT
                                                                                • 129 Mean dangerous failure rate λD
                                                                                • 1210 Safe failure fraction SFF
                                                                                • 1211 Probability of dangerous failure PFHD
                                                                                • 1212 Mean time to dangerous failure MTTFd
                                                                                • 1213 Demand rate nop
                                                                                • 1214 Average probability of dangerous failure on demand PFDavg
                                                                                  • Feedback
                                                                                  • Contact
                                                                                      1. naechste_Seite 24
                                                                                      2. naechste Seite 18
                                                                                      3. naechste Seite 6
                                                                                      4. naechste Seite 16
                                                                                      5. naechste Seite 14
                                                                                      6. naechste Seite 25
                                                                                      7. naechste_Seite 11
                                                                                      8. naechste_Seite 17
                                                                                      9. fbArbeitspunkt_Min Ja
                                                                                      10. fbArbeitspunkt Ja
                                                                                      11. ftProgramm Standard-Programm
                                                                                      12. fz_kv
                                                                                      13. fz_pe 80
                                                                                      14. fz_pG 60
                                                                                      15. fzDelta_p_Soll 20
                                                                                      16. ftEinheit_Druck mbar
                                                                                      17. fatTyp [115]
                                                                                      18. fbArbeitspunkt_Min_2 Ja
                                                                                      19. fbArbeitspunkt_2 Ja
                                                                                      20. ftRegler_Typ VAG
                                                                                      21. ftProgramm_2 Standard-Programm
                                                                                      22. fz_kv_2
                                                                                      23. fatMedium [08]
                                                                                      24. fzDichte 08
                                                                                      25. ftEinheit_Dichte kgm3
                                                                                      26. fzV_Norm 30
                                                                                      27. ftEinheit_Volstrom m3h
                                                                                      28. fz_pe_2 80
                                                                                      29. fz_pG_2 60
                                                                                      30. fzDelta_p_Soll_2 20
                                                                                      31. ftEinheit_Druck2 [mbar]
                                                                                      32. ftEinheit_Geschw [ms]
                                                                                      33. fatTyp_2 [10954451150103322]
                                                                                      34. fbArbeitspunkt_Min_3 Ja
                                                                                      35. fbArbeitspunkt_3 Ja
                                                                                      36. ftProgramm_3 Standard-Programm
                                                                                      37. fz_kv_3
                                                                                      38. fz_pe_3 20
                                                                                      39. fz_pG_3 0
                                                                                      40. fzDelta_p_Soll_3 20
                                                                                      41. fatTyp_3 [123]
                                                                                      42. fatSchaltleistung [6363683]
                                                                                      43. fz_nop_Stunde 1
                                                                                      44. fz_nop_Jahr 8760
                                                                                      45. fzZyklus 3600
                                                                                      46. fzB10d 6363683
                                                                                      47. fzT10d 10
                                                                                      48. fzPFHd_1V 15714170551864384e-8
                                                                                      49. fzPFDavg_1V
                                                                                      50. ftGeeignet_1V PL d SIL 2
                                                                                      51. fzPFHd_2V 33505832253532625e-10
                                                                                      52. fzPFDavg_2V
                                                                                      53. ftGeeignet_2V PL e SIL 3
                                                                                      54. ftUebersicht Off
                                                                                      55. ftVerstaendlichkeit Off
                                                                                      56. ftFehlende_Info
                                                                                      57. ftUmfang Off
                                                                                      58. ftVerwendung_1 Off
                                                                                      59. ftVerwendung_2 Off
                                                                                      60. ftVerwendung_3 Off
                                                                                      61. ftVerwendung_4 Off
                                                                                      62. ftNavigation Off
                                                                                      63. ftTaetigkeitsbereich Off
                                                                                      64. ftBemerkung
                                                                                      65. Michael Rehkamp Elster Kromschroumlder>btnSenden
Page 5: VAD, VAG, VAV, VAH, VRH, VCD, VCG, VCV, VCH · PDF fileVAD, VAG, VAH, VAV, VRH, VCD, VCG, VCV, VCH · Edition 04.15 6 VAD VAD VAS 1 .1 Examples of application 1 .1 .1 Constant pressure

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 5

Application

Pressure regulator on excess air burners in the ceramics in-dustry

Airgas ratio control on melting furnace for ensuring stoichio-metric combustion over the entire capacity range

Aluminium age-hardening furnace with airgas ratio controls for air deficiency cut-out

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 6

VAD

VADVAS

1 1 Examples of application1 1 1 Constant pressure controlThe pressure regulator with gas solenoid valve VAD maintains the set gas outlet pressure pd constant when subject to differing flow rates If a second gas so-lenoid valve is used upstream of the VAD this complies with the requirements of EN 746-2 for two Class A gas solenoid valves connected in series

1 1 2 Constant pressure control with two gas solenoid valvesThe pressure regulator with gas solenoid valve VAD maintains the set gas outlet pressure pd constant when subject to differing flow rates

Application

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 7

VAD

DGCmin DGCmax

VASPZL PZH

DGCmin DGCmax

VADVAS

VAS

PZL PZH

1 1 3 Constant pressure control with max pressure switchIn this example the minimum inlet pres-sure pu and the maximum outlet pres-sure pd are monitored with the pressure switches DGC The simple attachment of the pressure switch module makes installation easier

1 1 4 Constant pressure control with non-controlled pilot gas outletIn this application the pilot burner is supplied with a high inlet pressure via the pilot gas outlet The simple attach-ment of the bypass valve module makes installation easier The minimum inlet pressure pu and the maximum outlet pressure pd are monitored with the pres-sure switches DGC

Application gt Examples of application

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 8

psa

psa

VAG

MIC + BVA

psa

psaM

IC + BVA

VASVAG

1 1 5 Modulating controlThe gas outlet pressure pd is con trolled via the airgas ratio control with gas so-lenoid valve VAG The gas outlet pres-sure pd follows the changing air control pressure psa The ratio of gas pressure to air pressure remains constant The VAG is suitable for a control range up to 101If a second solenoid valve is used up-stream of the VAG this complies with the requirements of EN 746-2 for two Class A valves connected in series

1 1 6 Modulating control with two gas solenoid valvesThe gas outlet pressure pd is con trolled via the airgas ratio control with gas so-lenoid valve VAG The gas outlet pres-sure pd follows the changing air control pressure psa The ratio of gas pressure to air pressure remains constant The VAG is suitable for a control range up to 101The gas line is two Class A shut-off valves connected in series in accordance with the requirements of EN 746-2

Application gt Examples of application

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 9

DGCmin

PZL

psa

psa

M

IC + BVA

VAS

VAG

psa

DGCmin

PZL

psa

M

IC 40 + BVA

VAS

VAG

VAS 1

1 1 7 Modulating control with two gas solenoid valves and inlet pressure switchIn this case the minimum inlet pressure pu is monitored by the pressure switch DGC The simple attachment of the pressure switch module makes instal-lation easier

1 1 8 HighLow controlAt high fire the gas outlet pressure pd follows the air control pressure psa The ratio of gas pressure to air pressure re-mains constant Low fire is determined via the bypass valve VAS 1 Here as well the simple attachment of the bypass valve module makes installation easier

Application gt Examples of application

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 10

Venturi

DGCmin

PZL

M

IC + BVA

VASVAGN

1 1 9 Zero pressure controlIn this application the control air pres-sure is the atmospheric air pressure The air flow rate generates a negative pressure in the gas pipe via the Venturi This negative pressure is compensated by the airgas ratio control with gas solenoid valve VAGN The greater the negative pressure the greater the gas flow rate

Application gt Examples of application

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 11

BVHM + MB7L

VMV

ECOMAX

VASN

BCU BZA

Prozess SteuerungProcess Control (PCC)

AKT

psa-

psa

pd-

VAH

1 1 10 Staged flow rate controlThis application shows the VAH on a self recuperative burnerThe pressure loss in the recuperator de-pends on the furnace or kiln temperature When the furnace or kiln temperature is increased (at a constant air supply pres-sure) the flow rate drops This change in the air flow rate is measured by the orifice and the VAH changes the gas volume accordinglyThe air index (lambda) can be set using the fine-adjusting valve VMV

Application gt Examples of application

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 12

M

IC + BVA

VMV

VMO

VAH

VAS

psa-psa

pd-

psa

psc

DGCmin

PZL

psa

psc

M

IC + BVA

VAS VAV

1 1 11 Continuous or staged flow rate controlThis application shows flow rate control for a radiant tube burner system with plug-in recuperator for air preheatingThere are temperature-dependent air pressure losses in the recuperator The ratio of gas pressure to air pressure does not remain constant The fluctuating air flow rate is measured at the measuring orifice VMO and the VAH controls the gas flow rate proportionallyThe air index (lambda) can be set using the fine-adjusting valve VMV

Application gt Examples of application

1 1 12 Modulating control with variable airgas ratio control with gas solenoid valveThe ratio of gas pressure to air pressure can be adjusted infinitely between 061 and 31 Pressure fluctuations in the com-bustion chamber can be compensated via the combustion chamber control pressure psc see page 15 (Function)

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 13

DGCmin

PZL

psa

psc

VAS VAV

1 1 13 Modulating control in residential heat generationThis application shows the variable airgas ratio control with solenoid valve VAV fitted to a modulating-controlled forced draught burnerThe combustion air volume is set via a butterfly valve for air or by adjusting the fan speed

Application gt Examples of application

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 14

2 CertificationCertificates ndash see Docuthek

VAD VAG VAV VAH certified to SIL and PL

For systems up to SIL 3 pursuant to EN 61508 and PL e pursu-ant to ISO 13849

VAD VAG VAV VAHEU certified pursuant to

ndash Gas Appliances Directive (2009142EC) in conjunction with EN 13611 EN 161 EN 88-1 EN 126 and EN 1854

Meets the requirements of thendash Low Voltage Directive (200695EC)ndash EMC Directive (2004108EC)

VAD VAG VAV VAH FM approved

Factory Mutual Research Class 7400 Process Control Valves Designed for applications pursuant to NFPA 85 and NFPA 86 www approvalguide com

VAD VAG ANSICSA approved

American National Standards InstituteCanadian Standards Association ndash ANSI Z21 21CSA 6 5 ANSI Z21 18 and CSA 6 3

wwwcsagrouporg ndash Class number 3371-83 (natural gas LPG) 3371-03 (natural gas propane)

VAD VAG VAV UL listed

Underwriters Laboratories ndash UL 429 ldquoElectrically operated valvesrdquo wwwulcom Tools (at the bottom of the page) Online Certifications Directory

VAD VAG VAV AGA approved

AGA

Australian Gas Association Approval No 5319 httpwww aga asn auproduct_directory

Eurasian Customs Union

The product VAD VAG VAV VAH VCD VCG VCV VCH meets the technical specifications of the Eurasian Customs Union (the Russian Federation Belarus Kazakhstan)

Approval does not apply for 100 V AC and 200 V AC

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 15

3 Function3 1 VAD VAG VAH VRH VAVThe regulator is closed when it is disconnected from the power supplyOpening connect the system to the electrical power supply (alternating voltage will be rectified) The blue LED lights up The coilrsquos magnetic field pulls the armature upwards and clears the supply nozzle for the gas inlet pressure pu The gas passes through the internal impulse tube to the adjustment diaphragm and then pushes the valve disc open The outlet pressure is applied to the servo diaphragm via the internal feedback

The servo regulator then maintains a set constant outlet pres-sure pd

3 1 1 Pressure regulator for gas VADThe nominal outlet pressure pd is defined by the control spring

Servoregulator

Valve

Armature

Valve disc

Adjustmentdiaphragm

Servodiaphragm

Internalfeedback

Controlspring

Solenoid coil

Supplynozzle

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 16

3 1 2 Airgas ratio control VAGThe airgas ratio control VAG controls the outlet pressure pd depending on the variable air control pressure psaThe ratio of gas pressure to air pressure remains constant 11 The VAG is suitable for a control range up to 101If the burner operates at low-fire rate the gasair mixture can be changed by adjusting the zero point spring ldquoNrdquo

Function

psa

pd

Zero point setting N zero point spring

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 17

Function

3 1 3 Flow rate regulators VAH VRHThe flow rate regulators VAH VRH control the gas flow rate depending on the variable air flow rate The ratio of gas flow rate to air flow rate remains constant If the burner operates at low-fire rate the gasair mixture can be changed by adjusting the zero point spring ldquoNrdquoIn addition flow rate regulator VAH is designed as a gas solenoid valve and shuts off the gas or air supply safely

psa

psa-

pd-

pdInternal feedback

Zero point setting N zero point spring

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 18

3 1 4 Variable airgas ratio control VAVThe servo regulator maintains a set constant outlet pressure pd The variable airgas ratio control VAV controls the outlet pressure pd depending on the variable air control pressure psa The ratio of gas pressure to air pressure remains constantThe settings N and V can be changed and read off from both sides of the unit using the adjusting screwsThe ratio of gas pressure to air pressure at low-fire rate can be changed by adjusting the zero point setting N By turning the adjusting screw ldquoNrdquo the force of the zero point spring and thus the zero point is changed by plusmn 15 mbar (06 WC) see page 34 (Project planning information)The high-fire rate is set by turning the adjusting screw ldquoVrdquo until the required flue gas values are achieved see page 34 (Project planning information) The ratio of gas pressure to air pressure can be set from 061 to 31The settings N and V influence each other and the adjustment process must be repeated if necessaryThe outlet pressure pd is applied to the servo diaphragm via the internal feedback The combustion chamber control pres-sure psc is transmitted to the space under the air and servo diaphragms via an impulse lineThe pressure differential psa - psc is achieved on the air diaphragm and the pressure differential pd - psc on the servo diaphragm This ensures that pressure fluctuations in the combustion cham-ber can be compensated The flue gas values remain constant in the case of fluctuations in the combustion chamber pressure (pd - psc) = (psa - psc) times V + N

Function

pdpsc

psa

Air diaphragm

Transmission ratio V

Zero point setting N zero point spring

Internalfeedback

Adjustment diaphragm

Servo diaphragm

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 19

1 COM

2 NO

3 NC

3 1 5 Pressure regulator with gas solenoid valve VAx S position indicator with visual indicatorOpening when the pressure regulator is opened the posi-tion indicator switches The visual indicator is activated The ldquoopenrdquo signal is marked in red The double valve seat opens to release the volume of gasClosing the pressure regulator VAx is disconnected from the voltage supply and the closing spring presses the double valve disc on to the valve seat The position indicator is actuated The visual indicator is white for ldquoclosedrdquoThe actuator cannot be rotated on a pressure regulator with a position indicator and a visual indicatorNOTE NFPA 86 ndash the following must be taken into account as soon as the capacity of the pilot or main burner exceeds 117 kW (400000 BTUh) safety shut-off valve VASS must be fitted with a proof of closure overtravel switch with a visual position indicator and the burner-side pressure regulator with gas solenoid valve VAxS must also be fitted with a position indicator with visual indicator The closed position can be verified using the proof of closure switch of the gas solenoid valve VASS

Function

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 20

3 2 AnimationThe interactive animation shows the function of the valVario controls VADVAGVAHVAVClick on the picture The animation can be controlled using the control bar at the bottom of the window (as on a DVD player) To play the animation you will need Adobe Reader 7 or a newer version If you do not have Adobe Reader on your system you can download it from the Internet

Go to wwwadobecom click on ldquoAdobe Readerrdquo at the bottom of the page and follow the instructionsIf the animation does not start to play you can download it from the document library (wwwdocuthekcom) as an inde-pendent application

Function

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 21

3 3 Connection diagramWiring to EN 60204-1Connection diagram for VAxS with position indicator ndash see page 19 (Pressure regulator with gas solenoid valve VAxS position indicator with visual indicator)

3 3 1 VAx with M20 cable gland

L1 (+)

N (ndash)

3 3 2 VAx with plug

1 = N (-)

2 = L1 (+)

3 3 3 VAS with VADVAGVAHVAV with M20 cable glandL1V1 (+)

N (-)

L1V2 (+)

3 3 4 VAS with VADVAGVAHVAV with plug2 = L1V1 (+)

1 = N (-)

3 = L1V2 (+)

Function

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 22

4 Replacement possibilities for MODULINE pressure regulators with gas solenoid valve4 1 GVS GVI GVIB GVR and GVRH are to be replaced by VAD VAG VAG+VAS VAH and VAV

Type TypeGVS Pressure regulator with gas solenoid valve Pressure regulator with gas solenoid valve VADGVI Airgas ratio control with gas solenoid valve Airgas ratio control with gas solenoid valve VAG

GVIB Airgas ratio control with gas solenoid valve and bypass valve

Airgas ratio control with gas solenoid valve and bypass valve VAG+VAS

GVRH Flow rate regulator with gas solenoid valve Flow rate regulator with gas solenoid valve VAHGVR Variable airgas ratio control with gas solenoid valve Variable airgas ratio control with solenoid valve VAV115125 Flange 38 Size 115

Size 125 on request

115125 Flange frac12 Size 115

Size 125 Size 1 DN 15 115

115125 Flange frac34 Size 115

Size 125 Size 1 DN 20 120

115125 Flange 1 Size 115

Size 125 Size 1 DN 25 125

232240 Flange 1 Size 232

Size 240 on request

232240 Flange 1frac12 Size 232

Size 240 Size 2 DN 40 240

350 Flange 1frac12 Size 350 on request350 Flange 2 Size 350 Size 3 DN 50 350ML MODULINE + Rp internal thread connection fl anges Rp internal thread RTML MODULINE + NPT internal thread connection fl anges NPT internal thread N01 pu max 100 mbar (15 psig) pu max 500 mbar (7 psig) 02 200 mbar (3 psig) 500 mbar (7 psig)

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 23

Replacement possibilities for MODULINE pressure regulators with gas solenoid valve gt GVS GVI GVIB GVR and GVRH are to be replaced by VAD VAG VAG+VAS VAH and VAV

ContinuationType Type

Quick opening Quick opening NF1 Control ratio 11 Control ratio 11 K Mains voltage 24 V DC Mains voltage 24 V DC K

ndash 100 V AC PQ 120 V AC 120 V AC Q

ndash 200 V AC YT 220240 V AC 230 V AC W3 Electrical connection via terminals Electrical connection via terminals 6 Electrical connection via socket Electrical connection via socket 9 Metal terminal connection box Electrical connection via terminals S Position indicator Position indicator with visual indicator SG Position indicator for 24 V Position indicator for 24 V with visual indicator GM Suitable for biologically produced methane Suitable for biologically produced methane

Pressure test point at the inlet Pressure test point at the inlet and outlet Outlet pressure pd -25

Outlet pressure pd 25 ndash 25 mbar (1 ndash 10 WC)

2 ndash 90 mbar (08 ndash 36 WC) 20 ndash 50 mbar (8 ndash 20 WC) -5035 ndash 100 mbar (14 ndash 40 WC) -100Standard seat A

ExampleGVS 350ML01T3with Rp 2 connection flanges

ExampleVAD 350RNW-100A

with test points

= standard = available Pressure test points may be attached at the left- andor right-hand side Position indicator with visual indicator can be attached at the left- or right-hand side

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 24

∆p [i

nch

WC]

Qn [SCFH]100 400 600 4000 60001000 200020 30 40 50 200 3006015 80

1

08

1

2

3

4

56

8

10

20

30

40

5060

80

100

200

∆p [m

bar]

5

8

3

20

10

30

40

80

60

300

400

50

04 06 1 2 3 4 5 808 10 20 30 402

03 60 100 200

100

200

500

1

3

2

04 06 08 1 2 3 4 5 6 8 10 20 30 40

04 06 08 1 2 3 4 5 6 8 10

200

80 10020 3003

03Qn [m3h]

02

50 60 80 100

40 50 60

VAD

115

B

VAD

120

AVA

D 12

5A

P1P2

VAD

240

AVA

D 35

0A

= natural gas (ρ = 080 kgm3) = propane (ρ = 201 kgm3) = air (ρ = 129 kgm3)

The characteristic flow rate curves have been meas-ured with the specified flanges and a fitted strainer If two or more valves are combined the pressure loss of each additional valve drops by approx 5

metric imperial

Enter densityFlow rate Qn

Inlet pressure pu

Outlet pressure pd

Product RV v

Pressure loss ∆p

∆pmin

5 Flow rate5 1 Selection example for VADNatural gas Flow rate Qmax = 30 m3h Inlet pressure pu = 80 mbar Outlet pressure pd = 60 mbarThe desired control ratio from high-fire to low-fire rate is RV = 101High fire ∆p = pu - pd = 20 mbar Point P1Low fire Point P2 Qmin = 26 m3h at ∆p = 20 mbar RV = Qmax Qmin = 1151

Point P1 and point P2 must be within the working range of a unit size We recommend that you select the smallest size to achieve the best control properties

5 1 1 Calculate VAD

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 25

∆p [i

nch

WC]

Qn [SCFH]100 400 600 4000 60001000 200020 30 40 50 200 3006015 80

1

08

1

2

3

4

56

8

10

20

30

40

5060

80

100

200

∆p [m

bar]

5

8

3

20

10

30

40

80

60

300

400

50

04 06 1 2 3 4 5 808 10 20 30 402

03 60 100 200

100

200

500

1

3

2

04 06 08 1 2 3 4 5 6 8 10 20 30 40

04 06 08 1 2 3 4 5 6 8 10

200

80 10020 3003

03Qn [m3h]

02

50 60 80 100

40 50 60

= pd min lt 5 mbar

VAG

VxH

VAV

115

BVA

GV

xHV

AV 12

0A

VAG

VxH

VAV

125

A

P1

P2

VAG

VxH

VAV

240

AVA

GV

xHV

AV 3

50A

= natural gas (ρ = 080 kgm3) = propane (ρ = 201 kgm3) = air (ρ = 129 kgm3)

The characteristic flow rate curves have been meas-ured with the specified flanges and a fitted strainer If two or more valves are combined the pressure loss of each additional valve drops by approx 5

5 2 Selection example for VAG VAH VRH VAV Natural gas Flow rate Qmax = 30 m3h Inlet pressure pu = 80 mbar Outlet pressure pd max VAG = 60 mbarThe desired control ratio from high-fire to low-fire rate is RV = 101High fire ∆p = pu - pd max = 20 mbar Point P1Low fire pd min = pd max RV2 = 06 mbar Qmin = Qmax RV = 3 m3h ∆p = pu - pd min = 794 mbar Point P2 select VAG 120APoint P1 and point P2 must be within the working range of a unit size We recommend that you select the smallest size to achieve the best control properties

metric imperial

Enter densityFlow rate Qn

Inlet pressure pu

Outlet pressure pd

Product RV v

5 2 1 Calculate VAG VxH VAV

Pressure loss ∆p

∆pmin

Flow rate

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 26

∆p [i

nch

WC]

Qn [SCFH]100 400 600 4000 60001000 200020 30 40 50 200 3006015 80

1

08

1

2

3

4

56

8

10

20

30

40

5060

80

100

200

∆p [m

bar]

5

8

3

20

10

30

40

80

60

300

400

50

04 06 2 3 4 5 808 10 20 30 402

03 60 100 200

100

200

500

1

3

2

04 06 08 1 2 3 4 5 6 8 10 20 30 40

04 06 08 1 2 3 4 5 6 8 10

200

80 10020 3003

03Qn [m3h]

02

50 60 80 100

40 50 60

VAG

115

N

P1VAG

125

N

VAG

120

N

VAG

240

NP2

VAG

350

N

= natural gas (ρ = 080 kgm3) = propane (ρ = 201 kgm3) = air (ρ = 129 kgm3)

The characteristic flow rate curves have been meas-ured with the specified flanges and a fitted strainer If two or more valves are combined the pressure loss of each additional valve drops by approx 5

5 3 Selection example for zero governor VAG NNatural gas Flow rate Qmax = 30 m3h Inlet pressure pu = 20 mbar Outlet pressure pd = 0 mbar (atmospheric pressure)The desired control ratio from high-fire to low-fire rate is RV = 101High fire ∆p = pu - pd max = 20 mbar Point P1Low fire Point P2 Qmin = 24 m3h at ∆p = 20 mbar RV = Qmax Qmin = 1231Point P1 and point P2 must be within the working range of a unit size We recommend that you select the smallest size to achieve the best control properties

metric imperial

Enter densityFlow rate Qn

Inlet pressure pu

Outlet pressure pd

Product RV

5 3 1 Calculate VAG N

Pressure loss ∆p

∆pmin

Flow rate

v

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 27

6 Selection6 1 Selection table for pressure regulator with solenoid valve VAD

Accessories right Accessories left

Type1) T R N F N K P Q Y W S2) G2) R2) L2) M20

cab

le g

land

Plug

with

soc

ket

Plug

with

out s

ocke

t

-25-50 -100 A B Scre

w p

lug

Pres

sure

test

poi

nt

DG

17V

C 3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

Scre

w p

lug

Pres

sure

test

poi

nt

DG

17V

C 3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

VAD 115

VAD 120

VAD 125

VAD 240

VAD 350

= standard = available1) The following nominal inlet fl ange diameters are also available size 1 with nominal diameter DN 10 size 2 with nominal diameters DN 25 DN 32 and DN 50 size 3 with nominal diameters DN 40 and DN 652) Position indicator and bypasspilot gas valve cannot be fi tted together on the same side3) Specify the test point for inlet pressure pu or outlet pressure pdHelp for selecting the pressure regulator VAD can be found on the ProFi DVD wwwkromschroedercom Products DVD Product fi nder ldquoProFirdquo

Order exampleVAD 240RNW-100A

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 28

Selection

6 2 Type code for VADCode DescriptionVAD Pressure regulator with solenoid valve1 ndash 3 SizeT T-product10 ndash 65 Nominal inlet and outlet diameterRNF

Rp internal threadNPT internal thread

ISO fl angeN Quick opening quick closingKPQYW

Mains voltage 24 V DCMains voltage 100 V AC 5060 HzMains voltage 120 V AC 5060 HzMains voltage 200 V AC 5060 HzMains voltage 230 V AC 5060 Hz

SG

Position indicator with visual indicatorPosition indicator for 24 V with visual indicator

RL

Viewed from the right (in the direction of fl ow)Viewed from the left (in the direction of fl ow)

-25-50-100

Outlet pressure pd 25 ndash 25 mbar20 ndash 50 mbar

35 ndash 100 mbarAB

Standard valve seatReduced valve seat

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 29

Selection

6 3 Selection table for airgas ratio control with solenoid valve VAG flow rate regulators VAH VRH

Type1) T R N F N K P Q Y W S2) G2) R2) L2) M20

cab

le g

land

Plug

with

soc

ket

Plug

with

out s

ocke

t

A B E K A N Scre

w p

lug

Pres

sure

test

poi

ntD

G 1

7VC

3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

Scre

w p

lug

Pres

sure

test

poi

ntD

G 1

7VC

3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

VAG 115 VAG 120 VAG 125 VAG 240 VAG 350

VAH 115 VAH 120 VAH 125 VAH 240 VAH 350

VRH 115 VRH 120 VRH 125 VRH 240 VRH 350

= standard = available1) The following nominal inlet fl ange diameters are also available size 1 with nominal diameter DN 10 size 2 with nominal di-

ameters DN 25 DN 32 and DN 50 size 3 with nominal diameters DN 40 and DN 652) Position indicator and bypasspilot gas valve cannot be fi tted together on the same side3) Specify the test point for inlet pressure pu or outlet pressure pdHelp for selecting the regulators can be found on the ProFi DVD wwwkromschroedercom Products DVD Product fi nder ldquoProFirdquo

Order exampleVAG 240RNWAE

Accessories right Accessories left

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 30

Selection

6 4 Type code for VAG VAH VRHCode DescriptionVAGVAHVRH

Airgas ratio control with solenoid valveFlow rate regulator with solenoid valve

Flow rate regulator1 ndash 3 SizeT T-product15 ndash 50 Nominal inlet and outlet diameterRNF

Rp internal threadNPT internal thread

ISO fl angeN1) Quick opening quick closingK1)

P1)

Q1)

Y1)

W1)

Mains voltage 24 V DCMains voltage 100 V AC 5060 HzMains voltage 120 V AC 5060 HzMains voltage 200 V AC 5060 HzMains voltage 230 V AC 5060 Hz

S1)

G1)Position indicator with visual indicator

Position indicator for 24 V with visual indicatorRL

Viewed from the right (in the direction of fl ow)Viewed from the left (in the direction of fl ow)

AB

Standard valve seatReduced valve seat

EKAN

Connection kit for air control pressure psaVAG VAH VRH compression fi tting

VAG plastic hose couplingVAG VAH VRH NPT 18 adapter

VAG zero governor1) Only available for VAG VAV VAH

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 31

6 5 Selection table for variable airgas ratio control with solenoid valve VAVAccessories right Accessories left

Type1) T R N F N K P Q Y W S2) G2) R2) L2) M20

cab

le g

land

Plug

with

soc

ket

Plug

with

out s

ocke

t

A B E K A Scre

w p

lug

Pres

sure

test

poi

ntD

G 1

7VC

3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

Scre

w p

lug

Pres

sure

test

poi

ntD

G 1

7VC

3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

VAV 115

VAV 120

VAV 125

VAV 240

VAV 350

= standard = available1) The following nominal inlet fl ange diameters are also available size 1 with nominal diameter DN 10 size 2 with nominal diameters DN 25 DN 32 and DN 50 size 3 with nominal diameters DN 40 and DN 652) Position indicator and bypasspilot gas valve cannot be fi tted together on the same side3) Specify the test point for inlet pressure pu or outlet pressure pdHelp for selecting the variable airgas ratio control VAV can be found on the ProFi DVD wwwkromschroedercom

Products DVD Product fi nder ldquoProFirdquo

Order exampleVAV 240RNWAK

Selection

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 32

Selection

6 6 Type code for VAVCode DescriptionVAV Variable airgas ratio control with solenoid valve1 ndash 3 SizeT T-product15 ndash 50 Nominal inlet and outlet diameterRNF

Rp internal threadNPT internal thread

ISO fl angeN Quick opening quick closingKPQYW

Mains voltage 24 V DCMains voltage 100 V AC 5060 HzMains voltage 120 V AC 5060 HzMains voltage 200 V AC 5060 HzMains voltage 230 V AC 5060 Hz

SG

Position indicator with visual indicatorPosition indicator for 24 V with visual indicator

RL

Viewed from the right (in the direction of fl ow)Viewed from the left (in the direction of fl ow)

AB

Standard valve seatReduced valve seat

EKA

Connection kit for air control pressure psa and combus-tion chamber control pressure psc

compression fi ttingplastic hose coupling

NPT 18 adapter

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 33

Selection

6 7 AccessoriesModularly configurable withndash Screw plugsndash Pressure test pointsndash Pressure switch DGVC for inlet

andor outlet pressurendash Tightness control TCndash Bypasspilot gas valve VBY 8 for

size 1ndash Bypasspilot gas valve VAS 1For further information see page 37 (Accessories)

Position indicator

Plug with socket

Plug

Screwplugs

Pressuretest points

Pressure switch DGC Tightness

control TC

Bypasspilot gas valve VBY 8 for size 1

Bypasspilot gas valve VAS 1

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 34

7 Project planning informationDo not store or install the unit in the open airThe inlet pressure pu and the outlet pressure pd can be meas-ured on both sides of the valve body To increase the control accuracy an external impulse line can be connected instead of the pressure test point pd

VAD

pu

pd

(psa)

VAGpd

pu

psa

psa

VAD measurement point for the gas outlet pressure pd on the regulator body A combustion chamber control line (psc) can be connected to connection psa for maintaining a constant burner capacityVAG additional measurement point for the air control pressure psa on the regulator body

VAV

psapsc

pu

pd

VAH VRH

pu

pd-

pdpsa-

psa

VAV measurement point for the outlet pressure pd on the regulator bodyVAH additional measurement points for the outlet pressure pd- and the air control pressure psapsa- on the regulator body

7 1 Installation

GFK

VAGVAH

GFKVAD

Sealing material and thread cuttings must not be allowed to get into the valve housing Install a filter upstream of every system

gt20 mmgt0 79

The unit must not be in contact with masonry Minimum clear-ance 20 mm (079 inches)Ensure that there is sufficient space for installation and ad-justment

le +100 degCle +212 degF

The solenoid body heats up during operation ndash depending on ambient temperature (max 60degC140degF) and intrinsic heating (approx 40degC104degF)

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 35

In the case of double solenoid valves the position of the con-nection box can only be changed by removing the actuator and reinstalling it offset by 90deg or 180deg

If more than three valVario controls are installed in line the controls must be supported

The seals in some gas compression fittings are approved for temperatures of up to 70degC (158degF) This temperature limit will not be exceeded if the flow through the pipe is at least 1 msup3h (3531 SCFH) of gas and the maximum ambient temperature is 50degC (122degF)

7 1 1 Installation position

pu ge 80 mbar(80 hPa32 WC)

VAD VAG VAH VRH VAV

In humid environments black solenoid actuator in the vertical upright position only

VAD VAG VAH VRH black solenoid actuator in the vertical upright position or tilted up to the horizontal not upside downVAG VAH horizontal position only if pu ge 80 mbar (32 WC))VAV installation in the vertical position only black solenoid actuator in the vertical upright positionTo ensure that the airgas ratio control VAG the flow rate regulator VAH VRH or the variable airgas ratio control VAV can react quickly when the load is changed the impulse line for the air control pressure psa and for VAV the impulse line for the combustion chamber control pressure psc should be kept as short as possible The tube internal diameter for the impulse line must always be ge 39 mm (015)

VAH VRHIt is not permitted to install a gas solenoid valve VAS down-stream of flow rate regulator VAH VRH and upstream of fine-adjusting valve VMV The VAS would no longer be able to perform its function as a second safety valve if installed in the above-mentioned position

M

VMV

VAH

VASVAS

pd-

psa-psa

VMV

VAH pd-

psa-psa

The measuring orifice in the air line for impulse lines psa and psa- must always be installed downstream of the air control valve

Project planning information gt Installation

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 36

VAVThe impulse line for the combustion chamber control pres-sure psc must be fitted so that no condensation can enter the pressure regulator but rather flows back into the combustion chamber

7 2 Setting the low-fire rate on VAG VAH VRH VAV

-10 +05-05

ndash

+1

-15

mbar

+15

06

1 152

3

N V

+ +ndash

+30 -15+15

ndash

-3

+5

mbar

-5

N

+

VAG VAH VRH VAV

If the burner operates at low-fire rate the gasair mixture can be changed using the parallel shift of the characteristic curve by turning the adjusting screw ldquoNrdquoAdjusting range at low fire VAG VAH VRH -5 to +5 mbar (-195 to +195 WC) VAV -15 to +15 mbar (-06 to +06 WC)

7 3 Setting the high-fire rate on VAVTo set the high-fire rate the transmission ratio is changed us-ing the adjusting screw ldquoVrdquo until the required flue gas values are achievedTransmission ratio V = pdpsa = 061 to 31The settings N and V can influence each other and must be repeated if necessary

+N+V

-V

-N

VAV

psa [mbar]

p d [m

bar]

7 3 1 CalculationWith no connection to the combustion chamber control pres-sure psc pd = V times psa + NWith connection to the combustion chamber control pressure psc (pd - psc) = V times (psa - psc) + N

Project planning information

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 37

pu pd

21579

4836

085310

189

142

8 Accessories8 1 Gas pressure switch DG VC for VAx VRHType Adjusting range [mbar]DG 17VC 2 to 17DG 40VC 5 to 40DG 110VC 30 to 110DG 300VC 100 to 300

Scope of delivery 1 times pressure switch for gas 2 times retaining screws 2 times sealing rings

8 2 Gas pressure switch DG VCT for VAx T VRH TType Adjusting range [WC]DG 17VCT 08 to 68DG 40VCT 2 to 16DG 110VCT 12 to 44DG 300VCT 40 to 120

Scope of delivery 1 times gas pressure switch with AWG 18 connection wires 2 times retaining screws 2 times sealing ringsMonitoring the inlet pressure pu the electrical plug of the pressure switch for gas points towards the inlet flangeMonitoring the outlet pressure pd the electrical plug of the pressure switch for gas points towards the outlet flange

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 38

A BC

D

FE

ACD

F

B

E

8 3 Bypass valvepilot gas valve VAS 18 3 1 VAS 1 attached to VADVAGVAHVAV 1Scope of delivery A 1 times bypasspilot gas valve VAS 1 B 4 times O-rings C 4 times double nuts D 4 times connection parts E 1 times mounting aidBypass valve VAS 1 F 2 times connection pipes if the bypass valve has a blind flange

at the outlet sidePilot gas valve VAS 1 F 1 times connection pipe 1 times sealing plug if the pilot gas valve

has a threaded flange at the outlet side

Accessories

8 3 2 VAS 1 attached to VADVAGVAHVAV 2 VADVAGVAHVAV 3Scope of delivery A 1 times bypasspilot gas valve VAS 1 B 4 times O-rings C 4 times spacer sleeves D 4 times connection parts E 1 times mounting aidBypass valve VAS 1 F 2 times connection pipes if the bypass valve has a blind flange

at the outlet sidePilot gas valve VAS 1 F 1 times connection pipe 1 times sealing plug if the pilot gas valve

has a threaded flange at the outlet side

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 39

2

3

456

810

20

30

405060

80100

∆p [m

bar]

005 01 02 03 05 08 1 2 3 4 51

3

2

Qn [m3h]

1

01

02

03

0405

08

003

002

6 8 10

005 01 02 03 05 08 1 2 3 4 5003 6 8 10

20

005 01 02 03 05 08 1 2 3 4 5003 6 8 10 20

30

∆p [i

nch

WC]

1

2

3

456

810

20

30

40

04

004

006

00801

02

03

0506

08

Qn [SCFH]10 40 60 100 200 3001 500 10002 3 4 5

120 306 8

21 3 4 5 6 7 8 910

8 3 3 Flow rate

The characteristic flow rate curves have been measured for bypass valve VAS 1 with connection pipe diameter 1 to 10 mm (004 to 04) and for the pilot gas valve with 10 mm (04) connection pipe

Bypass valve connection pipe diameter [mm]

Pilo

t gas

val

ve 1

0 m

m (0

4)

conn

ectio

n pi

pe d

iam

eter

Accessories gt Bypass valvepilot gas valve VAS 1

= natural gas (ρ = 080 kgm3) = propane (ρ = 201 kgm3) = air (ρ = 129 kgm3)

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 40

Accessories

8 4 Bypass valvepilot gas valve VBY 8 for VADVAGVAHVAV 1

B

C

AVBY 8

VAx 1

55

(217)40(157)

70 (276)

80(315)

Rp frac14(pilot gas valve)

For mounting on VAD VAG VAH VAV 1 and double solenoid valve VCD VCG VCH VCV 1

8 4 1 Scope of delivery VBY 8I as bypass valveA 1 times bypass valve VBY 8IB 2 times retaining screws with 4 times O-rings both retaining screws

have a bypass orificeC 1 times grease for o-rings

8 4 2 Scope of delivery VBY 8R as pilot gas valveA 1 times pilot gas valve VBY 8RB 2 times retaining screws with 5 x O-rings one retaining screw

has a bypass orifice (2 x O-rings) the other does not (3 x O-rings)

C 1 times grease for O-rings

8 4 3 SelectionType I R W Q K 6L -R -L E B D 05

VBY 8

Order exampleVBY 8RW6L-LED

8 4 4 Type codeCode DescriptionVBY Gas solenoid valve8 Nominal sizeIR

For internal gas pick-up as bypass valveFor external gas pick-up as pilot gas valve

KQW

Mains voltage 24 V DC Mains voltage 120 V AC 5060 HzMains voltage 230 V AC 5060 Hz

6L Electrical connection via plug and socket with LED-R-L

Attachment side of main valve right-hand sideAttachment side of main valve left-hand side

EB

Attached to the VAxEnclosed (separate packing unit)

05D

Nozzle diameter = 05 mm (002)Flow adjustment

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 41

2

01

02

03

05

081

3

456

810

20

30

405060

80100

∆p [m

bar]

1

3

201 02 03 05 1 2 3001 003 4

Qn [m3h]

02 03 05 1 2

01 02 05

002 006

002

002 006 1

0010006 005 01

001

0003

0006 2 3

VBY 8DVBY 805

∆p [i

nch

WC]

1

2

3

456

810

20

30

40

040506

08

1

Qn [SCFH]10 40 60 1005 2081 2 30402

01

02

03

004005006

008

Adjusting range

8 4 5 Flow rateVBY 8 D

+

-

The flow rate can be set by turning the flow rate restrictor (4 mm016 Allen screw) frac14 of a turn Flow rate 10 to 100

VBY 8 05The flow is routed through a 05 mm (002) nozzle and thus has a fixed characteristic flow rate curve Adjustment is not possible

8 4 6 Technical dataInlet pressure pu max 500 mbar (7 psig)Ambient temperature 0 to +60degC (32 to 140degF) no condensation permittedStorage temperature 0 to +40degC (32 to 104degF) no condensation permittedPower consumption 24 V = 8 W 120 V = 8 W 230 V = 95 WEnclosure IP 54

Accessories gt Bypass valvepilot gas valve VBY 8 for VADVAGVAHVAV 1

= natural gas (ρ = 080 kgm3) = propane (ρ = 201 kgm3) = air (ρ = 129 kgm3)

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 42

TC 116VB C

56(22)

49(193)

27(106)

A

A

VCx 1 VCx 2VCx 3

8 5 Tightness control TC 116Vfor VAx 1 ndash 3An adapter plate is required to attach the tightness control to the right- or left-hand side of the pressure regulator with gas solenoid valveScope of delivery A 1 times adapter plate B 2 times O-rings C 2 times retaining screwsFor attachment to left-hand side Order No 74922391 right-hand side Order No 74921995

8 6 Pressure test pointsTest points to check the inlet pressure pu and outlet pressure pdScope of delivery 1 x pressure test points with 1 x profiled sealing rings Order No 74923390

8 7 Cable gland setWhen wiring a double solenoid valve with pressure regula-tor VCx the connection boxes are to be connected using a cable gland setThe cable gland set can only be used if the connection boxes are at the same height and on the same side and if both valves are equipped either with or without a proof of closure switchVA 1 Order No 74921985 VA 2 Order No 74921986 VA 3 Order No 74921987

Accessories

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 43

A B

D

C

Accessories

8 9 Differential pressure orifice

Size PipeDN

Differential pressure orifi cewith outlet dia

1 15 17 mm 0671 20 25 mm 0981 25 30 mm 1182 40 46 mm 1813 50 58 mm 228

If pressure regulator VADVAGVAV 1 is retrofitted upstream of gas solenoid valve VAS 1 a DN 25 differential pressure orifice with outlet opening d = 30 mm (118) must be inserted at the outlet of the pressure regulatorIn the case of pressure regulator VAx 115 or VAx 120 the DN 25 differential pressure orifice must be ordered separately and retrofitted Order No 74922240

8 8 Seal set VA 1 ndash 3VA 1 Order No 74921988 VA 2 Order No 74921989 VA 3 Order No 74921990Scope of deliveryA 1 times double block seal B 2 times O-rings (flange) C 2 times O-rings (pressure switch) for pressure test pointscrew plug D 2 times sealing rings (flat sealing) and 2 times profiled sealing rings

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 44

BA

C

pd-

8 11 Attachment blockFor locked installation of pressure gauge and other acces-soriesScope of delivery A 1 times attachment block B 2 times self-tapping screws for installation C 2 times O-rings

Accessories

8 10 Retaining frameIn the event that a pressure regulator VAx is installed at a later point upstream of a gas solenoid valve VAS a measur-ing orifice VMO or a fine-adjusting valve VMV the retaining frame must be fitted at the inlet of the second device in order to fasten the differential pressure orifice at the regulator outlet Order the retaining frame separatelyRetaining frame for Size 1 Order No 74923029 Size 2 Order No 74923030 Size 3 Order No 74923031

8 12 Gas control lineFine-adjusting valve VMV can be installed on the flow rate regulator VAH for fine adjustment of the gas flow rateThe gas control line for gas outlet pressure pd- is available with 2 18 compression fittingsSize 1 Order No 74924458 Size 2 Order No 74924459

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 45

8 13 Measuring orifice VMOThe measuring orifice VMO is designed to reduce the gas and air flow rates and is installed downstream of the valVario control The measuring orifice is available with Rp internal thread (NPT internal thread) or flange to ISO 7005See wwwdocuthekcom Elster Kromschroumlder Krom-schroumlder LBE Products 03 Valves and butterfly valves valVario accessories Type of document Technical Informa-tion VMO

Accessories

8 14 Filter module VMFUsing the filter module VMF the gas flow upstream of the gas solenoid valve VAS and the airgas ratio control is cleaned The filter module is available with Rp internal thread (NPT internal thread) or flange to ISO 7005 and can also be supplied with fitted pressure switch as an optionSee wwwdocuthekcom Elster Kromschroumlder Krom-schroumlder LBE Products 03 Valves and butterfly valves valVario accessories Type of document Technical Informa-tion VMF

8 15 Fine-adjusting valve VMVThe flow rate is set using the fine-adjusting valve VMV The fine-adjusting valve is available with Rp internal thread (NPT internal thread) or flange to ISO 7005See wwwdocuthekcom Elster Kromschroumlder Krom-schroumlder LBE Products 03 Valves and butterfly valves valVario accessories Type of document Technical Infor-mation VMV

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 46

9 Technical dataGas types natural gas LPG (gaseous) biologically produced methane (max 01 -by-vol H2S) or clean air other gases on request The gas must be clean and dry in all temperature conditions and must not contain condensateCE and FM approved UL listed max inlet pressure pu 10 ndash 500 mbar (4 ndash 200 WC) FM approved (230 V AC 120 V AC 24 V DC) non opera-tional pressure 700 mbar (10 psig)ANSICSA approved (230 V AC 120 V AC 24 V DC) up to 350 mbar (5 psig)Opening time of the solenoid valve quick opening le 05 s Closing time quick closing lt 1 sMedium and ambient temperatures -20 to +60degC (-4 to +140degF) no condensation permittedStorage temperature -20 to +40degC (-4 to +104degF)Enclosure IP 65Valve housing aluminium valve seal NBRConnection flanges with internal thread Rp to ISO 7-1 NPT to ANSIASMESafety valve Class A to EN 161 Factory Mutual Research Class 7400 Process Control Valves (230 V AC 120 V AC 24 V DC) ANSI Z2121 and CSA 65 ANSI Z2118 and CSA 63Control class A to EN 88-1Control range up to 101

Mains voltage 230 V AC +10-15 5060 Hz 200 V AC +10-15 5060 Hz 120 V AC +10-15 5060 Hz 100 V AC +10-15 5060 Hz 24 V DC plusmn20Duty cycle 100Power factor of the solenoid coil cos φ = 09Power consumption

Type Voltage Power

VAx 1

24 V DC 25 W ndash100 V AC 25 W (26 VA)120 V AC 25 W (26 VA)200 V AC 25 W (26 VA)230 V AC 25 W (26 VA)

VAx 2 VAx 3

24 V DC 36 W ndash100 V AC 36 W (40 VA)120 V AC 40 W (44 VA)200 V AC 40 W (44 VA)230 V AC 40 W (44 VA)

VBY24 V DC 8 W ndash

120 V AC 8 W ndash230 V AC 95 W ndash

Cable gland M20 times 15Electrical connection cable with max 25 mm2 (AWG 12) or plug with socket to EN 175301-803

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 47

Position indicator contact rating

Type Voltage Min current(resistive load)

Max current(resistive load)

VAxS VCxS 12 ndash 250 V AC 5060 Hz 100 mA 3 AVAxG VCxG 12 ndash 30 V DC 2 mA 01 A

Position indicator switching frequency max 5 times per minute

Switching current [A]

Switching cyclescos φ = 1 cos φ = 06

01 500000 50000005 300000 250000

1 200000 1000003 100000 ndash

Limited to max 200000 cycles for heating systems

9 1 VADOutlet pressure pd VAD-25 25 ndash 25 mbar (1 ndash 10 WC) VAD-50 20 ndash 50 mbar (8 ndash 20 WC) VAD-100 35 ndash 100 mbar (14 ndash 40 WC)Combustion chamber control pressure psc (connection psa)

-20 to +20 mbar (-78 to +78 WC)

VAD

pu

pd

(psa)

9 2 VAGOutlet pressure pd 05 ndash 100 mbar (02 ndash 40 WC)Air control pressure psa 05 ndash 100 mbar (02 ndash 40 WC)

Adjusting range at low fire plusmn5 mbar (plusmn2 WC)Transmission ratio of gas to air 11The inlet pressure must always be higher than the air control pressure psa + pressure loss ∆p + 5 mbar (2 WC)

VAGpd

pu

psa

psa

VAGK 1 x 18 coupling for plastic hose (internal dia 39 mm (015) external dia 61 mm (024)) or VAGE 1 x 18 compression fitting for 6 times 1 tube or VAGA 1 x NPT 18 adapter or VAGN zero governor with breathing orifice

9 3 VAH VRHAir control pressure psa 06 ndash 100 mbar (024 ndash 40 WC) Differential air pressure ∆psa (psa - psa-) 06 ndash 50 mbar (024 ndash 197 WC) Differential gas pressure ∆pd (pd - pd-) 06 ndash 50 mbar (024 ndash 197 WC)Transmission ratio of gas to air 11The inlet pressure must always be higher than the differen-tial air pressure ∆psa + pressure loss ∆p + max gas pres-sure on burner + 5 mbar (2 WC)Adjusting range at low fire plusmn5 mbar (plusmn2 WC)

Technical data

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 48

VAHVRH

pd-

pu

psa-

psa

Connection of the air control pressure psaVAHE VRHE 3 x 18 compression fitting for 6 times 1 tube or VAHA VRHA 3 x NPT 18 adapter

9 4 VAVOutlet pressure pd 05 ndash 30 mbar (02 ndash 117 WC)Air control pressure psa 04 ndash 30 mbar (015 ndash 117 WC)Combustion chamber control pressure psc

-20 to +20 mbar (-78 to +78 WC)Min control pressure differential psa - psc 04 mbar (015 WC)Min pressure differential pd - psc 05 mbar (02 WC)Adjusting range at low fire plusmn15 mbar (plusmn06 WC)Transmission ratio of gas to air 061 to 31The inlet pressure pu must always be higher than the air control pressure psa times transmission ratio V + pressure loss ∆p + 15 mbar (06 WC)

pu

pd psapsc

VAV

VAVK 2 x plastic hose couplings (internal dia 39 mm (015) external dia 61 mm (024)) or VAVE 2 x 18 compression fitting for 6 times 1 tube or VAVA 2 x NPT 18 adapter

Technical data

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 49

9 5 Safety-specific characteristic values for VAx 1 ndash 3For SILSuitable for Safety Integrity Level SIL 1 2 3

Diagnostic coverage DC 0

Type of subsystem Type A to EN 61508-2 74312

Operating mode High demand mode pursu-ant to EN 61508-4 3512

For PLSuitable for Performance Level PL a b c d e

Category B 1 2 3 4Common cause failure CCF gt 65Application of essential safety requirements Satisfied

Application of tried-and-tested safety requirements Satisfied

For SIL and PL

B10d value

Operating cyclesVAD VAG VAV VAH 1 10094360VAD VAG VAV VAH 2 8229021VAD VAG VAV VAH 3 6363683

Hardware fault tolerance (1 valve) HFT 0

Hardware fault tolerance (2 valves) HFT 1

Safe failure fraction SFF gt 90Fraction of undetected com-mon cause failures β ge 2

Max service life under operating conditions10 years after date of production plus max 12 year in stor-age prior to first use or once the given number of operating cycles has been reached depending on which is achieved firstThe devices are suitable for single-channel systems (HFT = 0) up to SIL 2PL d and up to SIL 3PL e when two re-dundant valves are installed in a double-channel architecture (HFT = 1) provided that the complete system complies with the requirements of EN 61508ISO 13849

For a glossary of terms see page 53 (Glossary)

Technical data

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 50

nop 1hnop 1a

sB10d

T10d aPFHD (1 VAx) 1h

PFHD (2 VAx) 1h

PFDavg (1 VAx)

PFDavg (2 VAx)

Technical data gt Safety-specific characteristic values for VAx 1 ndash 3

9 5 1 Determining the PFHD value the λD value and the MTTFd value

PFHD = λD = x nop= 1MTTFd

01B10d

PFDavg = x λD x 24 x 365 x T10d 12

Type

Cycle time

suitable for

suitable for

PFHD = Probability of dangerous failure (HDM = high de-mand mode) [1hour]PFDavg = Average probability of dangerous failure on de-mand (LDM = low demand mode)λD = Mean dangerous failure rate [1hour]MTTFd = Mean time to dangerous failure [hours]nop = Demand rate (mean number of annual operations) [1hour]

9 5 2 Calculating the PFHD and PFDavg

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 51

VAD VAG VAH VAV

H1

Rp frac14(NPT frac14)

H2

E

LF

F

H4

H3

B

VAxS VAxF

L2G

G

Technical data

9 6 Dimensions

Type

Connec-tion Dimensions

WeightRpNPT DN

L L2 E F G H1 H2 H3 H4 Bmm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch kg lbs

VAx 115 12 15 75 29 ndash ndash 75 29 15 06 ndash ndash 143 56 82 32 161 63 117 46 97 38 18 40VAH 115 12 15 75 29 ndash ndash 75 29 15 06 ndash ndash 143 56 100 39 161 63 135 53 97 38 2 44VAx 120 34 20 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 82 33 161 63 117 46 97 38 19 42VAH 120 34 20 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 100 39 161 63 135 53 97 38 21 46VAx 125 1 25 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 82 33 161 63 117 46 97 38 19 42VAH 125 1 25 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 100 39 161 63 135 53 97 38 21 46VAx 240 112 40 128 50 200 79 85 33 29 11 66 26 170 67 112 44 191 75 162 64 125 49 44 97VAH 240 112 40 128 50 200 79 85 33 29 11 66 26 170 67 132 52 191 75 182 72 125 49 47 104VAx 350 2 50 155 61 230 91 85 33 36 14 74 29 180 70 135 53 201 79 196 77 160 63 61 134VAH 350 2 50 155 61 230 91 85 33 36 14 74 29 180 70 156 61 201 79 217 85 160 63 64 141

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 52

10 Converting unitssee wwwadlatusorg

11 Maintenance cyclesAt least once per annum at least twice per annum for biologi-cally produced methaneIf the flow rate drops clean the strainer

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 53

12 Glossary12 1 Diagnostic coverage DCMeasure of the effectiveness of diagnostics which may be determined as the ratio between the failure rate of detected dangerous failures and the failure rate of total dangerous failuresNOTE Diagnostic coverage can exist for the whole or parts of a safety-related system For example diagnostic cover-age could exist for sensors andor logic system andor final elements Unit see EN ISO 13849-12008

12 2 Mode of operationHigh demand mode or continuous modeOperating mode where the frequency of demands for opera-tion made on a safety-related system is greater than one per year or greater than twice the proof-test frequencysee EN 61508-42008

12 3 CategoryClassification of the safety-related parts of a control system in respect of their resistance to faults and their subsequent behaviour in the fault condition and which is achieved by the structural arrangement of the parts fault detection andor by their reliability see EN ISO 13849-12008

12 4 Common cause failure CCFFailures of different items resulting from a single event where these failures are not consequences of each othersee EN ISO 13849-12008

12 5 Fraction of undetected common cause failures β Fraction of undetected failures of redundant components due to a single event whereby these failures are not based on mutual causesNOTE β is expressed as a fraction in the equations and as a percentage elsewheresee EN 61508-62010

12 6 B10d valueMean number of cycles until 10 of the components fail dan-gerouslysee EN ISO 13849-12008

12 7 T10d valueMean time until 10 of the components fail dangerouslysee EN ISO 13849-12008

12 8 Hardware fault tolerance HFTA hardware fault tolerance of N means that N + 1 is the mini-mum number of faults that could cause a loss of the safety functionsee IEC 61508-22010

12 9 Mean dangerous failure rate λD Mean rate of dangerous failures during operation time (T10d) Unit 1hsee EN ISO 13849-12008

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 54

12 10 Safe failure fraction SFFFraction of safe failures related to all failures which are as-sumed to appearsee EN 13611A22011

12 11 Probability of dangerous failure PFHD Value describing the likelihood of dangerous failure per hour of a component for high demand mode or continuous mode Unit 1hsee EN 13611A22011

12 12 Mean time to dangerous failure MTTFd Expectation of the mean time to dangerous failuresee EN ISO 13849-12008

12 13 Demand rate nop Mean number of annual operationssee EN ISO 13849-12008

12 14 Average probability of dangerous failure on demand PFDavg (LDM = 1 ndash 10 switching cyclesyear)Average probability of a dangerous failure of the safety function on demand (LDM = low demand mode)see EN 61508-6

Glossary

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415

Finally we are offering you the opportunity to assess this ldquoTechnical Information (TI)rdquo and to give us your opinion so that we can improve our documents further and suit them to your needs

ClarityFound information quicklySearched for a long timeDidnrsquot find informationWhat is missing

ComprehensionCoherentToo complicatedNo answer

ScopeToo littleSufficientToo wideNo answer

No answer

NavigationI can find my way aroundI got ldquolostrdquoNo answer

UseTo get to know the productTo choose a productPlanningTo look for information

My scope of functionsTechnical departmentSalesNo answer

Remarks

(Adobe Reader 7 or higher required) wwwadobecom

Elster GmbH Postfach 2809 middot 49018 Osnabruumlck Strotheweg 1 middot 49504 Lotte (Buumlren) GermanyT +49 541 1214-0 F +49 541 1214-370 infokromschroedercomwwwkromschroedercom

The current addresses of our international agents are available on the Internetwwwkromschroederdeindexphpid=718ampL=1

We reserve the right to make technical modifications in the interests of progressCopyright copy 2015 Elster GmbH All rights reserved

Contact

Feedback

0325

0530

  • Pressure regulators with solenoid valve VAD VAG VAV VAH
  • Flow rate regulator VRH
  • Pressure regulators with double solenoid valve VCD VCG VCV VCH
  • Contents
  • 1 Application
    • 11 Examples of application
      • 111 Constant pressure control
      • 112 Constant pressure control with two gas solenoid valves
      • 113 Constant pressure control with max pressure switch
      • 114 Constant pressure control with non-controlled pilot gas outlet
      • 115 Modulating control
      • 116 Modulating control with two gas solenoid valves
      • 117 Modulating control with two gas solenoid valves and inlet pressure switch
      • 118 HighLow control
      • 119 Zero pressure control
      • 1110 Staged flow rate control
      • 1111 Continuous or staged flow rate control
      • 1112 Modulating control with variable airgas ratio control with gas solenoid valve
      • 1113 Modulating control in residential heat generation
          • 2 Certification
          • 3 Function
            • 31 VAD VAG VAH VRH VAV
              • 311 Pressure regulator for gas VAD
              • 312 Airgas ratio control VAG
              • 313 Flow rate regulators VAH VRH
              • 314 Variable airgas ratio control VAV
              • 315 Pressure regulator with gas solenoid valve VAxS position indicator with visual indicator
                • 32 Animation
                • 33 Connection diagram
                  • 331 VAx with M20 cable gland
                  • 332 VAx with plug
                  • 333 VAS with VADVAGVAHVAV with M20 cable gland
                  • 334 VAS with VADVAGVAHVAV with plug
                      • 4 Replacement possibilities for MODULINE pressure regulators with gas solenoid valve
                        • 41 GVS GVI GVIB GVR and GVRH are to be replaced by VAD VAG VAG+VAS VAH and VAV
                          • 5 Flow rate
                            • 51 Selection example for VAD
                              • 511 Calculate VAD
                                • 52 Selection example for VAG VAH VRH VAV
                                  • 521 CalculateVAG VxHVAV
                                    • 53 Selection example for zero governor VAGN
                                      • 531 Calculate VAGN
                                          • 6 Selection
                                            • 61 Selection table for pressure regulator with solenoid valve VAD
                                            • 62 Type code for VAD
                                            • 63 Selection table for airgas ratio control with solenoid valve VAG flow rate regulators VAH VRH
                                            • 64 Type code for VAG VAH VRH
                                            • 65 Selection table for variable airgas ratio control with solenoid valve VAV
                                            • 66 Type code for VAV
                                            • 67 Accessories
                                              • 7 Project planning information
                                                • 71 Installation
                                                  • 711 Installation position
                                                    • 72 Setting the low-fire rate on VAG VAH VRH VAV
                                                    • 73 Setting the high-fire rate on VAV
                                                      • 731 Calculation
                                                          • 8 Accessories
                                                            • 81 Gas pressure switch DGVC for VAx VRH
                                                            • 82 Gas pressure switch DGVCT for VAxT VRHT
                                                            • 83 Bypass valvepilot gas valve VAS 1
                                                              • 831 VAS 1 attached to VADVAGVAHVAV 1
                                                              • 832 VAS 1 attached to VADVAGVAHVAV 2 VADVAGVAHVAV 3
                                                              • 833 Flow rate
                                                                • 84 Bypass valvepilot gas valve VBY 8 for VADVAGVAHVAV 1
                                                                  • 841 Scope of delivery VBY 8I as bypass valve
                                                                  • 842 Scope of delivery VBY 8R as pilot gas valve
                                                                  • 843 Selection
                                                                  • 844 Type code
                                                                  • 845 Flow rate
                                                                  • 846 Technical data
                                                                    • 85 Tightness control TC 116V
                                                                    • 86 Pressure test points
                                                                    • 87 Cable gland set
                                                                    • 88 Seal set VA 1thinspndashthinsp3
                                                                    • 89 Differential pressure orifice
                                                                    • 810 Retaining frame
                                                                    • 811 Attachment block
                                                                    • 812 Gas control line
                                                                    • 813 Measuring orifice VMO
                                                                    • 814 Filter module VMF
                                                                    • 815 Fine-adjusting valve VMV
                                                                      • 9 Technical data
                                                                        • 91 VAD
                                                                        • 92 VAG
                                                                        • 93 VAH VRH
                                                                        • 94 VAV
                                                                        • 95 Safety-specific characteristic values for VAx 1thinspndashthinsp3
                                                                          • 951 Determining the PFHD value the λD value and the MTTFd value
                                                                          • 952 Calculating the PFHD and PFDavg
                                                                            • 96 Dimensions
                                                                              • 10 Converting units
                                                                              • 11 Maintenance cycles
                                                                              • 12 Glossary
                                                                                • 121 Diagnostic coverage DC
                                                                                • 122 Mode of operation
                                                                                • 123 Category
                                                                                • 124 Common cause failure CCF
                                                                                • 125 Fraction of undetected common cause failures β
                                                                                • 126 B10d value
                                                                                • 127 T10d value
                                                                                • 128 Hardware fault tolerance HFT
                                                                                • 129 Mean dangerous failure rate λD
                                                                                • 1210 Safe failure fraction SFF
                                                                                • 1211 Probability of dangerous failure PFHD
                                                                                • 1212 Mean time to dangerous failure MTTFd
                                                                                • 1213 Demand rate nop
                                                                                • 1214 Average probability of dangerous failure on demand PFDavg
                                                                                  • Feedback
                                                                                  • Contact
                                                                                      1. naechste_Seite 24
                                                                                      2. naechste Seite 18
                                                                                      3. naechste Seite 6
                                                                                      4. naechste Seite 16
                                                                                      5. naechste Seite 14
                                                                                      6. naechste Seite 25
                                                                                      7. naechste_Seite 11
                                                                                      8. naechste_Seite 17
                                                                                      9. fbArbeitspunkt_Min Ja
                                                                                      10. fbArbeitspunkt Ja
                                                                                      11. ftProgramm Standard-Programm
                                                                                      12. fz_kv
                                                                                      13. fz_pe 80
                                                                                      14. fz_pG 60
                                                                                      15. fzDelta_p_Soll 20
                                                                                      16. ftEinheit_Druck mbar
                                                                                      17. fatTyp [115]
                                                                                      18. fbArbeitspunkt_Min_2 Ja
                                                                                      19. fbArbeitspunkt_2 Ja
                                                                                      20. ftRegler_Typ VAG
                                                                                      21. ftProgramm_2 Standard-Programm
                                                                                      22. fz_kv_2
                                                                                      23. fatMedium [08]
                                                                                      24. fzDichte 08
                                                                                      25. ftEinheit_Dichte kgm3
                                                                                      26. fzV_Norm 30
                                                                                      27. ftEinheit_Volstrom m3h
                                                                                      28. fz_pe_2 80
                                                                                      29. fz_pG_2 60
                                                                                      30. fzDelta_p_Soll_2 20
                                                                                      31. ftEinheit_Druck2 [mbar]
                                                                                      32. ftEinheit_Geschw [ms]
                                                                                      33. fatTyp_2 [10954451150103322]
                                                                                      34. fbArbeitspunkt_Min_3 Ja
                                                                                      35. fbArbeitspunkt_3 Ja
                                                                                      36. ftProgramm_3 Standard-Programm
                                                                                      37. fz_kv_3
                                                                                      38. fz_pe_3 20
                                                                                      39. fz_pG_3 0
                                                                                      40. fzDelta_p_Soll_3 20
                                                                                      41. fatTyp_3 [123]
                                                                                      42. fatSchaltleistung [6363683]
                                                                                      43. fz_nop_Stunde 1
                                                                                      44. fz_nop_Jahr 8760
                                                                                      45. fzZyklus 3600
                                                                                      46. fzB10d 6363683
                                                                                      47. fzT10d 10
                                                                                      48. fzPFHd_1V 15714170551864384e-8
                                                                                      49. fzPFDavg_1V
                                                                                      50. ftGeeignet_1V PL d SIL 2
                                                                                      51. fzPFHd_2V 33505832253532625e-10
                                                                                      52. fzPFDavg_2V
                                                                                      53. ftGeeignet_2V PL e SIL 3
                                                                                      54. ftUebersicht Off
                                                                                      55. ftVerstaendlichkeit Off
                                                                                      56. ftFehlende_Info
                                                                                      57. ftUmfang Off
                                                                                      58. ftVerwendung_1 Off
                                                                                      59. ftVerwendung_2 Off
                                                                                      60. ftVerwendung_3 Off
                                                                                      61. ftVerwendung_4 Off
                                                                                      62. ftNavigation Off
                                                                                      63. ftTaetigkeitsbereich Off
                                                                                      64. ftBemerkung
                                                                                      65. Michael Rehkamp Elster Kromschroumlder>btnSenden
Page 6: VAD, VAG, VAV, VAH, VRH, VCD, VCG, VCV, VCH · PDF fileVAD, VAG, VAH, VAV, VRH, VCD, VCG, VCV, VCH · Edition 04.15 6 VAD VAD VAS 1 .1 Examples of application 1 .1 .1 Constant pressure

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 6

VAD

VADVAS

1 1 Examples of application1 1 1 Constant pressure controlThe pressure regulator with gas solenoid valve VAD maintains the set gas outlet pressure pd constant when subject to differing flow rates If a second gas so-lenoid valve is used upstream of the VAD this complies with the requirements of EN 746-2 for two Class A gas solenoid valves connected in series

1 1 2 Constant pressure control with two gas solenoid valvesThe pressure regulator with gas solenoid valve VAD maintains the set gas outlet pressure pd constant when subject to differing flow rates

Application

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 7

VAD

DGCmin DGCmax

VASPZL PZH

DGCmin DGCmax

VADVAS

VAS

PZL PZH

1 1 3 Constant pressure control with max pressure switchIn this example the minimum inlet pres-sure pu and the maximum outlet pres-sure pd are monitored with the pressure switches DGC The simple attachment of the pressure switch module makes installation easier

1 1 4 Constant pressure control with non-controlled pilot gas outletIn this application the pilot burner is supplied with a high inlet pressure via the pilot gas outlet The simple attach-ment of the bypass valve module makes installation easier The minimum inlet pressure pu and the maximum outlet pressure pd are monitored with the pres-sure switches DGC

Application gt Examples of application

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 8

psa

psa

VAG

MIC + BVA

psa

psaM

IC + BVA

VASVAG

1 1 5 Modulating controlThe gas outlet pressure pd is con trolled via the airgas ratio control with gas so-lenoid valve VAG The gas outlet pres-sure pd follows the changing air control pressure psa The ratio of gas pressure to air pressure remains constant The VAG is suitable for a control range up to 101If a second solenoid valve is used up-stream of the VAG this complies with the requirements of EN 746-2 for two Class A valves connected in series

1 1 6 Modulating control with two gas solenoid valvesThe gas outlet pressure pd is con trolled via the airgas ratio control with gas so-lenoid valve VAG The gas outlet pres-sure pd follows the changing air control pressure psa The ratio of gas pressure to air pressure remains constant The VAG is suitable for a control range up to 101The gas line is two Class A shut-off valves connected in series in accordance with the requirements of EN 746-2

Application gt Examples of application

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 9

DGCmin

PZL

psa

psa

M

IC + BVA

VAS

VAG

psa

DGCmin

PZL

psa

M

IC 40 + BVA

VAS

VAG

VAS 1

1 1 7 Modulating control with two gas solenoid valves and inlet pressure switchIn this case the minimum inlet pressure pu is monitored by the pressure switch DGC The simple attachment of the pressure switch module makes instal-lation easier

1 1 8 HighLow controlAt high fire the gas outlet pressure pd follows the air control pressure psa The ratio of gas pressure to air pressure re-mains constant Low fire is determined via the bypass valve VAS 1 Here as well the simple attachment of the bypass valve module makes installation easier

Application gt Examples of application

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 10

Venturi

DGCmin

PZL

M

IC + BVA

VASVAGN

1 1 9 Zero pressure controlIn this application the control air pres-sure is the atmospheric air pressure The air flow rate generates a negative pressure in the gas pipe via the Venturi This negative pressure is compensated by the airgas ratio control with gas solenoid valve VAGN The greater the negative pressure the greater the gas flow rate

Application gt Examples of application

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 11

BVHM + MB7L

VMV

ECOMAX

VASN

BCU BZA

Prozess SteuerungProcess Control (PCC)

AKT

psa-

psa

pd-

VAH

1 1 10 Staged flow rate controlThis application shows the VAH on a self recuperative burnerThe pressure loss in the recuperator de-pends on the furnace or kiln temperature When the furnace or kiln temperature is increased (at a constant air supply pres-sure) the flow rate drops This change in the air flow rate is measured by the orifice and the VAH changes the gas volume accordinglyThe air index (lambda) can be set using the fine-adjusting valve VMV

Application gt Examples of application

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 12

M

IC + BVA

VMV

VMO

VAH

VAS

psa-psa

pd-

psa

psc

DGCmin

PZL

psa

psc

M

IC + BVA

VAS VAV

1 1 11 Continuous or staged flow rate controlThis application shows flow rate control for a radiant tube burner system with plug-in recuperator for air preheatingThere are temperature-dependent air pressure losses in the recuperator The ratio of gas pressure to air pressure does not remain constant The fluctuating air flow rate is measured at the measuring orifice VMO and the VAH controls the gas flow rate proportionallyThe air index (lambda) can be set using the fine-adjusting valve VMV

Application gt Examples of application

1 1 12 Modulating control with variable airgas ratio control with gas solenoid valveThe ratio of gas pressure to air pressure can be adjusted infinitely between 061 and 31 Pressure fluctuations in the com-bustion chamber can be compensated via the combustion chamber control pressure psc see page 15 (Function)

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 13

DGCmin

PZL

psa

psc

VAS VAV

1 1 13 Modulating control in residential heat generationThis application shows the variable airgas ratio control with solenoid valve VAV fitted to a modulating-controlled forced draught burnerThe combustion air volume is set via a butterfly valve for air or by adjusting the fan speed

Application gt Examples of application

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 14

2 CertificationCertificates ndash see Docuthek

VAD VAG VAV VAH certified to SIL and PL

For systems up to SIL 3 pursuant to EN 61508 and PL e pursu-ant to ISO 13849

VAD VAG VAV VAHEU certified pursuant to

ndash Gas Appliances Directive (2009142EC) in conjunction with EN 13611 EN 161 EN 88-1 EN 126 and EN 1854

Meets the requirements of thendash Low Voltage Directive (200695EC)ndash EMC Directive (2004108EC)

VAD VAG VAV VAH FM approved

Factory Mutual Research Class 7400 Process Control Valves Designed for applications pursuant to NFPA 85 and NFPA 86 www approvalguide com

VAD VAG ANSICSA approved

American National Standards InstituteCanadian Standards Association ndash ANSI Z21 21CSA 6 5 ANSI Z21 18 and CSA 6 3

wwwcsagrouporg ndash Class number 3371-83 (natural gas LPG) 3371-03 (natural gas propane)

VAD VAG VAV UL listed

Underwriters Laboratories ndash UL 429 ldquoElectrically operated valvesrdquo wwwulcom Tools (at the bottom of the page) Online Certifications Directory

VAD VAG VAV AGA approved

AGA

Australian Gas Association Approval No 5319 httpwww aga asn auproduct_directory

Eurasian Customs Union

The product VAD VAG VAV VAH VCD VCG VCV VCH meets the technical specifications of the Eurasian Customs Union (the Russian Federation Belarus Kazakhstan)

Approval does not apply for 100 V AC and 200 V AC

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 15

3 Function3 1 VAD VAG VAH VRH VAVThe regulator is closed when it is disconnected from the power supplyOpening connect the system to the electrical power supply (alternating voltage will be rectified) The blue LED lights up The coilrsquos magnetic field pulls the armature upwards and clears the supply nozzle for the gas inlet pressure pu The gas passes through the internal impulse tube to the adjustment diaphragm and then pushes the valve disc open The outlet pressure is applied to the servo diaphragm via the internal feedback

The servo regulator then maintains a set constant outlet pres-sure pd

3 1 1 Pressure regulator for gas VADThe nominal outlet pressure pd is defined by the control spring

Servoregulator

Valve

Armature

Valve disc

Adjustmentdiaphragm

Servodiaphragm

Internalfeedback

Controlspring

Solenoid coil

Supplynozzle

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 16

3 1 2 Airgas ratio control VAGThe airgas ratio control VAG controls the outlet pressure pd depending on the variable air control pressure psaThe ratio of gas pressure to air pressure remains constant 11 The VAG is suitable for a control range up to 101If the burner operates at low-fire rate the gasair mixture can be changed by adjusting the zero point spring ldquoNrdquo

Function

psa

pd

Zero point setting N zero point spring

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 17

Function

3 1 3 Flow rate regulators VAH VRHThe flow rate regulators VAH VRH control the gas flow rate depending on the variable air flow rate The ratio of gas flow rate to air flow rate remains constant If the burner operates at low-fire rate the gasair mixture can be changed by adjusting the zero point spring ldquoNrdquoIn addition flow rate regulator VAH is designed as a gas solenoid valve and shuts off the gas or air supply safely

psa

psa-

pd-

pdInternal feedback

Zero point setting N zero point spring

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 18

3 1 4 Variable airgas ratio control VAVThe servo regulator maintains a set constant outlet pressure pd The variable airgas ratio control VAV controls the outlet pressure pd depending on the variable air control pressure psa The ratio of gas pressure to air pressure remains constantThe settings N and V can be changed and read off from both sides of the unit using the adjusting screwsThe ratio of gas pressure to air pressure at low-fire rate can be changed by adjusting the zero point setting N By turning the adjusting screw ldquoNrdquo the force of the zero point spring and thus the zero point is changed by plusmn 15 mbar (06 WC) see page 34 (Project planning information)The high-fire rate is set by turning the adjusting screw ldquoVrdquo until the required flue gas values are achieved see page 34 (Project planning information) The ratio of gas pressure to air pressure can be set from 061 to 31The settings N and V influence each other and the adjustment process must be repeated if necessaryThe outlet pressure pd is applied to the servo diaphragm via the internal feedback The combustion chamber control pres-sure psc is transmitted to the space under the air and servo diaphragms via an impulse lineThe pressure differential psa - psc is achieved on the air diaphragm and the pressure differential pd - psc on the servo diaphragm This ensures that pressure fluctuations in the combustion cham-ber can be compensated The flue gas values remain constant in the case of fluctuations in the combustion chamber pressure (pd - psc) = (psa - psc) times V + N

Function

pdpsc

psa

Air diaphragm

Transmission ratio V

Zero point setting N zero point spring

Internalfeedback

Adjustment diaphragm

Servo diaphragm

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 19

1 COM

2 NO

3 NC

3 1 5 Pressure regulator with gas solenoid valve VAx S position indicator with visual indicatorOpening when the pressure regulator is opened the posi-tion indicator switches The visual indicator is activated The ldquoopenrdquo signal is marked in red The double valve seat opens to release the volume of gasClosing the pressure regulator VAx is disconnected from the voltage supply and the closing spring presses the double valve disc on to the valve seat The position indicator is actuated The visual indicator is white for ldquoclosedrdquoThe actuator cannot be rotated on a pressure regulator with a position indicator and a visual indicatorNOTE NFPA 86 ndash the following must be taken into account as soon as the capacity of the pilot or main burner exceeds 117 kW (400000 BTUh) safety shut-off valve VASS must be fitted with a proof of closure overtravel switch with a visual position indicator and the burner-side pressure regulator with gas solenoid valve VAxS must also be fitted with a position indicator with visual indicator The closed position can be verified using the proof of closure switch of the gas solenoid valve VASS

Function

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 20

3 2 AnimationThe interactive animation shows the function of the valVario controls VADVAGVAHVAVClick on the picture The animation can be controlled using the control bar at the bottom of the window (as on a DVD player) To play the animation you will need Adobe Reader 7 or a newer version If you do not have Adobe Reader on your system you can download it from the Internet

Go to wwwadobecom click on ldquoAdobe Readerrdquo at the bottom of the page and follow the instructionsIf the animation does not start to play you can download it from the document library (wwwdocuthekcom) as an inde-pendent application

Function

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 21

3 3 Connection diagramWiring to EN 60204-1Connection diagram for VAxS with position indicator ndash see page 19 (Pressure regulator with gas solenoid valve VAxS position indicator with visual indicator)

3 3 1 VAx with M20 cable gland

L1 (+)

N (ndash)

3 3 2 VAx with plug

1 = N (-)

2 = L1 (+)

3 3 3 VAS with VADVAGVAHVAV with M20 cable glandL1V1 (+)

N (-)

L1V2 (+)

3 3 4 VAS with VADVAGVAHVAV with plug2 = L1V1 (+)

1 = N (-)

3 = L1V2 (+)

Function

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 22

4 Replacement possibilities for MODULINE pressure regulators with gas solenoid valve4 1 GVS GVI GVIB GVR and GVRH are to be replaced by VAD VAG VAG+VAS VAH and VAV

Type TypeGVS Pressure regulator with gas solenoid valve Pressure regulator with gas solenoid valve VADGVI Airgas ratio control with gas solenoid valve Airgas ratio control with gas solenoid valve VAG

GVIB Airgas ratio control with gas solenoid valve and bypass valve

Airgas ratio control with gas solenoid valve and bypass valve VAG+VAS

GVRH Flow rate regulator with gas solenoid valve Flow rate regulator with gas solenoid valve VAHGVR Variable airgas ratio control with gas solenoid valve Variable airgas ratio control with solenoid valve VAV115125 Flange 38 Size 115

Size 125 on request

115125 Flange frac12 Size 115

Size 125 Size 1 DN 15 115

115125 Flange frac34 Size 115

Size 125 Size 1 DN 20 120

115125 Flange 1 Size 115

Size 125 Size 1 DN 25 125

232240 Flange 1 Size 232

Size 240 on request

232240 Flange 1frac12 Size 232

Size 240 Size 2 DN 40 240

350 Flange 1frac12 Size 350 on request350 Flange 2 Size 350 Size 3 DN 50 350ML MODULINE + Rp internal thread connection fl anges Rp internal thread RTML MODULINE + NPT internal thread connection fl anges NPT internal thread N01 pu max 100 mbar (15 psig) pu max 500 mbar (7 psig) 02 200 mbar (3 psig) 500 mbar (7 psig)

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 23

Replacement possibilities for MODULINE pressure regulators with gas solenoid valve gt GVS GVI GVIB GVR and GVRH are to be replaced by VAD VAG VAG+VAS VAH and VAV

ContinuationType Type

Quick opening Quick opening NF1 Control ratio 11 Control ratio 11 K Mains voltage 24 V DC Mains voltage 24 V DC K

ndash 100 V AC PQ 120 V AC 120 V AC Q

ndash 200 V AC YT 220240 V AC 230 V AC W3 Electrical connection via terminals Electrical connection via terminals 6 Electrical connection via socket Electrical connection via socket 9 Metal terminal connection box Electrical connection via terminals S Position indicator Position indicator with visual indicator SG Position indicator for 24 V Position indicator for 24 V with visual indicator GM Suitable for biologically produced methane Suitable for biologically produced methane

Pressure test point at the inlet Pressure test point at the inlet and outlet Outlet pressure pd -25

Outlet pressure pd 25 ndash 25 mbar (1 ndash 10 WC)

2 ndash 90 mbar (08 ndash 36 WC) 20 ndash 50 mbar (8 ndash 20 WC) -5035 ndash 100 mbar (14 ndash 40 WC) -100Standard seat A

ExampleGVS 350ML01T3with Rp 2 connection flanges

ExampleVAD 350RNW-100A

with test points

= standard = available Pressure test points may be attached at the left- andor right-hand side Position indicator with visual indicator can be attached at the left- or right-hand side

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 24

∆p [i

nch

WC]

Qn [SCFH]100 400 600 4000 60001000 200020 30 40 50 200 3006015 80

1

08

1

2

3

4

56

8

10

20

30

40

5060

80

100

200

∆p [m

bar]

5

8

3

20

10

30

40

80

60

300

400

50

04 06 1 2 3 4 5 808 10 20 30 402

03 60 100 200

100

200

500

1

3

2

04 06 08 1 2 3 4 5 6 8 10 20 30 40

04 06 08 1 2 3 4 5 6 8 10

200

80 10020 3003

03Qn [m3h]

02

50 60 80 100

40 50 60

VAD

115

B

VAD

120

AVA

D 12

5A

P1P2

VAD

240

AVA

D 35

0A

= natural gas (ρ = 080 kgm3) = propane (ρ = 201 kgm3) = air (ρ = 129 kgm3)

The characteristic flow rate curves have been meas-ured with the specified flanges and a fitted strainer If two or more valves are combined the pressure loss of each additional valve drops by approx 5

metric imperial

Enter densityFlow rate Qn

Inlet pressure pu

Outlet pressure pd

Product RV v

Pressure loss ∆p

∆pmin

5 Flow rate5 1 Selection example for VADNatural gas Flow rate Qmax = 30 m3h Inlet pressure pu = 80 mbar Outlet pressure pd = 60 mbarThe desired control ratio from high-fire to low-fire rate is RV = 101High fire ∆p = pu - pd = 20 mbar Point P1Low fire Point P2 Qmin = 26 m3h at ∆p = 20 mbar RV = Qmax Qmin = 1151

Point P1 and point P2 must be within the working range of a unit size We recommend that you select the smallest size to achieve the best control properties

5 1 1 Calculate VAD

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 25

∆p [i

nch

WC]

Qn [SCFH]100 400 600 4000 60001000 200020 30 40 50 200 3006015 80

1

08

1

2

3

4

56

8

10

20

30

40

5060

80

100

200

∆p [m

bar]

5

8

3

20

10

30

40

80

60

300

400

50

04 06 1 2 3 4 5 808 10 20 30 402

03 60 100 200

100

200

500

1

3

2

04 06 08 1 2 3 4 5 6 8 10 20 30 40

04 06 08 1 2 3 4 5 6 8 10

200

80 10020 3003

03Qn [m3h]

02

50 60 80 100

40 50 60

= pd min lt 5 mbar

VAG

VxH

VAV

115

BVA

GV

xHV

AV 12

0A

VAG

VxH

VAV

125

A

P1

P2

VAG

VxH

VAV

240

AVA

GV

xHV

AV 3

50A

= natural gas (ρ = 080 kgm3) = propane (ρ = 201 kgm3) = air (ρ = 129 kgm3)

The characteristic flow rate curves have been meas-ured with the specified flanges and a fitted strainer If two or more valves are combined the pressure loss of each additional valve drops by approx 5

5 2 Selection example for VAG VAH VRH VAV Natural gas Flow rate Qmax = 30 m3h Inlet pressure pu = 80 mbar Outlet pressure pd max VAG = 60 mbarThe desired control ratio from high-fire to low-fire rate is RV = 101High fire ∆p = pu - pd max = 20 mbar Point P1Low fire pd min = pd max RV2 = 06 mbar Qmin = Qmax RV = 3 m3h ∆p = pu - pd min = 794 mbar Point P2 select VAG 120APoint P1 and point P2 must be within the working range of a unit size We recommend that you select the smallest size to achieve the best control properties

metric imperial

Enter densityFlow rate Qn

Inlet pressure pu

Outlet pressure pd

Product RV v

5 2 1 Calculate VAG VxH VAV

Pressure loss ∆p

∆pmin

Flow rate

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 26

∆p [i

nch

WC]

Qn [SCFH]100 400 600 4000 60001000 200020 30 40 50 200 3006015 80

1

08

1

2

3

4

56

8

10

20

30

40

5060

80

100

200

∆p [m

bar]

5

8

3

20

10

30

40

80

60

300

400

50

04 06 2 3 4 5 808 10 20 30 402

03 60 100 200

100

200

500

1

3

2

04 06 08 1 2 3 4 5 6 8 10 20 30 40

04 06 08 1 2 3 4 5 6 8 10

200

80 10020 3003

03Qn [m3h]

02

50 60 80 100

40 50 60

VAG

115

N

P1VAG

125

N

VAG

120

N

VAG

240

NP2

VAG

350

N

= natural gas (ρ = 080 kgm3) = propane (ρ = 201 kgm3) = air (ρ = 129 kgm3)

The characteristic flow rate curves have been meas-ured with the specified flanges and a fitted strainer If two or more valves are combined the pressure loss of each additional valve drops by approx 5

5 3 Selection example for zero governor VAG NNatural gas Flow rate Qmax = 30 m3h Inlet pressure pu = 20 mbar Outlet pressure pd = 0 mbar (atmospheric pressure)The desired control ratio from high-fire to low-fire rate is RV = 101High fire ∆p = pu - pd max = 20 mbar Point P1Low fire Point P2 Qmin = 24 m3h at ∆p = 20 mbar RV = Qmax Qmin = 1231Point P1 and point P2 must be within the working range of a unit size We recommend that you select the smallest size to achieve the best control properties

metric imperial

Enter densityFlow rate Qn

Inlet pressure pu

Outlet pressure pd

Product RV

5 3 1 Calculate VAG N

Pressure loss ∆p

∆pmin

Flow rate

v

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 27

6 Selection6 1 Selection table for pressure regulator with solenoid valve VAD

Accessories right Accessories left

Type1) T R N F N K P Q Y W S2) G2) R2) L2) M20

cab

le g

land

Plug

with

soc

ket

Plug

with

out s

ocke

t

-25-50 -100 A B Scre

w p

lug

Pres

sure

test

poi

nt

DG

17V

C 3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

Scre

w p

lug

Pres

sure

test

poi

nt

DG

17V

C 3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

VAD 115

VAD 120

VAD 125

VAD 240

VAD 350

= standard = available1) The following nominal inlet fl ange diameters are also available size 1 with nominal diameter DN 10 size 2 with nominal diameters DN 25 DN 32 and DN 50 size 3 with nominal diameters DN 40 and DN 652) Position indicator and bypasspilot gas valve cannot be fi tted together on the same side3) Specify the test point for inlet pressure pu or outlet pressure pdHelp for selecting the pressure regulator VAD can be found on the ProFi DVD wwwkromschroedercom Products DVD Product fi nder ldquoProFirdquo

Order exampleVAD 240RNW-100A

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 28

Selection

6 2 Type code for VADCode DescriptionVAD Pressure regulator with solenoid valve1 ndash 3 SizeT T-product10 ndash 65 Nominal inlet and outlet diameterRNF

Rp internal threadNPT internal thread

ISO fl angeN Quick opening quick closingKPQYW

Mains voltage 24 V DCMains voltage 100 V AC 5060 HzMains voltage 120 V AC 5060 HzMains voltage 200 V AC 5060 HzMains voltage 230 V AC 5060 Hz

SG

Position indicator with visual indicatorPosition indicator for 24 V with visual indicator

RL

Viewed from the right (in the direction of fl ow)Viewed from the left (in the direction of fl ow)

-25-50-100

Outlet pressure pd 25 ndash 25 mbar20 ndash 50 mbar

35 ndash 100 mbarAB

Standard valve seatReduced valve seat

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 29

Selection

6 3 Selection table for airgas ratio control with solenoid valve VAG flow rate regulators VAH VRH

Type1) T R N F N K P Q Y W S2) G2) R2) L2) M20

cab

le g

land

Plug

with

soc

ket

Plug

with

out s

ocke

t

A B E K A N Scre

w p

lug

Pres

sure

test

poi

ntD

G 1

7VC

3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

Scre

w p

lug

Pres

sure

test

poi

ntD

G 1

7VC

3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

VAG 115 VAG 120 VAG 125 VAG 240 VAG 350

VAH 115 VAH 120 VAH 125 VAH 240 VAH 350

VRH 115 VRH 120 VRH 125 VRH 240 VRH 350

= standard = available1) The following nominal inlet fl ange diameters are also available size 1 with nominal diameter DN 10 size 2 with nominal di-

ameters DN 25 DN 32 and DN 50 size 3 with nominal diameters DN 40 and DN 652) Position indicator and bypasspilot gas valve cannot be fi tted together on the same side3) Specify the test point for inlet pressure pu or outlet pressure pdHelp for selecting the regulators can be found on the ProFi DVD wwwkromschroedercom Products DVD Product fi nder ldquoProFirdquo

Order exampleVAG 240RNWAE

Accessories right Accessories left

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 30

Selection

6 4 Type code for VAG VAH VRHCode DescriptionVAGVAHVRH

Airgas ratio control with solenoid valveFlow rate regulator with solenoid valve

Flow rate regulator1 ndash 3 SizeT T-product15 ndash 50 Nominal inlet and outlet diameterRNF

Rp internal threadNPT internal thread

ISO fl angeN1) Quick opening quick closingK1)

P1)

Q1)

Y1)

W1)

Mains voltage 24 V DCMains voltage 100 V AC 5060 HzMains voltage 120 V AC 5060 HzMains voltage 200 V AC 5060 HzMains voltage 230 V AC 5060 Hz

S1)

G1)Position indicator with visual indicator

Position indicator for 24 V with visual indicatorRL

Viewed from the right (in the direction of fl ow)Viewed from the left (in the direction of fl ow)

AB

Standard valve seatReduced valve seat

EKAN

Connection kit for air control pressure psaVAG VAH VRH compression fi tting

VAG plastic hose couplingVAG VAH VRH NPT 18 adapter

VAG zero governor1) Only available for VAG VAV VAH

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 31

6 5 Selection table for variable airgas ratio control with solenoid valve VAVAccessories right Accessories left

Type1) T R N F N K P Q Y W S2) G2) R2) L2) M20

cab

le g

land

Plug

with

soc

ket

Plug

with

out s

ocke

t

A B E K A Scre

w p

lug

Pres

sure

test

poi

ntD

G 1

7VC

3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

Scre

w p

lug

Pres

sure

test

poi

ntD

G 1

7VC

3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

VAV 115

VAV 120

VAV 125

VAV 240

VAV 350

= standard = available1) The following nominal inlet fl ange diameters are also available size 1 with nominal diameter DN 10 size 2 with nominal diameters DN 25 DN 32 and DN 50 size 3 with nominal diameters DN 40 and DN 652) Position indicator and bypasspilot gas valve cannot be fi tted together on the same side3) Specify the test point for inlet pressure pu or outlet pressure pdHelp for selecting the variable airgas ratio control VAV can be found on the ProFi DVD wwwkromschroedercom

Products DVD Product fi nder ldquoProFirdquo

Order exampleVAV 240RNWAK

Selection

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 32

Selection

6 6 Type code for VAVCode DescriptionVAV Variable airgas ratio control with solenoid valve1 ndash 3 SizeT T-product15 ndash 50 Nominal inlet and outlet diameterRNF

Rp internal threadNPT internal thread

ISO fl angeN Quick opening quick closingKPQYW

Mains voltage 24 V DCMains voltage 100 V AC 5060 HzMains voltage 120 V AC 5060 HzMains voltage 200 V AC 5060 HzMains voltage 230 V AC 5060 Hz

SG

Position indicator with visual indicatorPosition indicator for 24 V with visual indicator

RL

Viewed from the right (in the direction of fl ow)Viewed from the left (in the direction of fl ow)

AB

Standard valve seatReduced valve seat

EKA

Connection kit for air control pressure psa and combus-tion chamber control pressure psc

compression fi ttingplastic hose coupling

NPT 18 adapter

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 33

Selection

6 7 AccessoriesModularly configurable withndash Screw plugsndash Pressure test pointsndash Pressure switch DGVC for inlet

andor outlet pressurendash Tightness control TCndash Bypasspilot gas valve VBY 8 for

size 1ndash Bypasspilot gas valve VAS 1For further information see page 37 (Accessories)

Position indicator

Plug with socket

Plug

Screwplugs

Pressuretest points

Pressure switch DGC Tightness

control TC

Bypasspilot gas valve VBY 8 for size 1

Bypasspilot gas valve VAS 1

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 34

7 Project planning informationDo not store or install the unit in the open airThe inlet pressure pu and the outlet pressure pd can be meas-ured on both sides of the valve body To increase the control accuracy an external impulse line can be connected instead of the pressure test point pd

VAD

pu

pd

(psa)

VAGpd

pu

psa

psa

VAD measurement point for the gas outlet pressure pd on the regulator body A combustion chamber control line (psc) can be connected to connection psa for maintaining a constant burner capacityVAG additional measurement point for the air control pressure psa on the regulator body

VAV

psapsc

pu

pd

VAH VRH

pu

pd-

pdpsa-

psa

VAV measurement point for the outlet pressure pd on the regulator bodyVAH additional measurement points for the outlet pressure pd- and the air control pressure psapsa- on the regulator body

7 1 Installation

GFK

VAGVAH

GFKVAD

Sealing material and thread cuttings must not be allowed to get into the valve housing Install a filter upstream of every system

gt20 mmgt0 79

The unit must not be in contact with masonry Minimum clear-ance 20 mm (079 inches)Ensure that there is sufficient space for installation and ad-justment

le +100 degCle +212 degF

The solenoid body heats up during operation ndash depending on ambient temperature (max 60degC140degF) and intrinsic heating (approx 40degC104degF)

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 35

In the case of double solenoid valves the position of the con-nection box can only be changed by removing the actuator and reinstalling it offset by 90deg or 180deg

If more than three valVario controls are installed in line the controls must be supported

The seals in some gas compression fittings are approved for temperatures of up to 70degC (158degF) This temperature limit will not be exceeded if the flow through the pipe is at least 1 msup3h (3531 SCFH) of gas and the maximum ambient temperature is 50degC (122degF)

7 1 1 Installation position

pu ge 80 mbar(80 hPa32 WC)

VAD VAG VAH VRH VAV

In humid environments black solenoid actuator in the vertical upright position only

VAD VAG VAH VRH black solenoid actuator in the vertical upright position or tilted up to the horizontal not upside downVAG VAH horizontal position only if pu ge 80 mbar (32 WC))VAV installation in the vertical position only black solenoid actuator in the vertical upright positionTo ensure that the airgas ratio control VAG the flow rate regulator VAH VRH or the variable airgas ratio control VAV can react quickly when the load is changed the impulse line for the air control pressure psa and for VAV the impulse line for the combustion chamber control pressure psc should be kept as short as possible The tube internal diameter for the impulse line must always be ge 39 mm (015)

VAH VRHIt is not permitted to install a gas solenoid valve VAS down-stream of flow rate regulator VAH VRH and upstream of fine-adjusting valve VMV The VAS would no longer be able to perform its function as a second safety valve if installed in the above-mentioned position

M

VMV

VAH

VASVAS

pd-

psa-psa

VMV

VAH pd-

psa-psa

The measuring orifice in the air line for impulse lines psa and psa- must always be installed downstream of the air control valve

Project planning information gt Installation

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 36

VAVThe impulse line for the combustion chamber control pres-sure psc must be fitted so that no condensation can enter the pressure regulator but rather flows back into the combustion chamber

7 2 Setting the low-fire rate on VAG VAH VRH VAV

-10 +05-05

ndash

+1

-15

mbar

+15

06

1 152

3

N V

+ +ndash

+30 -15+15

ndash

-3

+5

mbar

-5

N

+

VAG VAH VRH VAV

If the burner operates at low-fire rate the gasair mixture can be changed using the parallel shift of the characteristic curve by turning the adjusting screw ldquoNrdquoAdjusting range at low fire VAG VAH VRH -5 to +5 mbar (-195 to +195 WC) VAV -15 to +15 mbar (-06 to +06 WC)

7 3 Setting the high-fire rate on VAVTo set the high-fire rate the transmission ratio is changed us-ing the adjusting screw ldquoVrdquo until the required flue gas values are achievedTransmission ratio V = pdpsa = 061 to 31The settings N and V can influence each other and must be repeated if necessary

+N+V

-V

-N

VAV

psa [mbar]

p d [m

bar]

7 3 1 CalculationWith no connection to the combustion chamber control pres-sure psc pd = V times psa + NWith connection to the combustion chamber control pressure psc (pd - psc) = V times (psa - psc) + N

Project planning information

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 37

pu pd

21579

4836

085310

189

142

8 Accessories8 1 Gas pressure switch DG VC for VAx VRHType Adjusting range [mbar]DG 17VC 2 to 17DG 40VC 5 to 40DG 110VC 30 to 110DG 300VC 100 to 300

Scope of delivery 1 times pressure switch for gas 2 times retaining screws 2 times sealing rings

8 2 Gas pressure switch DG VCT for VAx T VRH TType Adjusting range [WC]DG 17VCT 08 to 68DG 40VCT 2 to 16DG 110VCT 12 to 44DG 300VCT 40 to 120

Scope of delivery 1 times gas pressure switch with AWG 18 connection wires 2 times retaining screws 2 times sealing ringsMonitoring the inlet pressure pu the electrical plug of the pressure switch for gas points towards the inlet flangeMonitoring the outlet pressure pd the electrical plug of the pressure switch for gas points towards the outlet flange

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 38

A BC

D

FE

ACD

F

B

E

8 3 Bypass valvepilot gas valve VAS 18 3 1 VAS 1 attached to VADVAGVAHVAV 1Scope of delivery A 1 times bypasspilot gas valve VAS 1 B 4 times O-rings C 4 times double nuts D 4 times connection parts E 1 times mounting aidBypass valve VAS 1 F 2 times connection pipes if the bypass valve has a blind flange

at the outlet sidePilot gas valve VAS 1 F 1 times connection pipe 1 times sealing plug if the pilot gas valve

has a threaded flange at the outlet side

Accessories

8 3 2 VAS 1 attached to VADVAGVAHVAV 2 VADVAGVAHVAV 3Scope of delivery A 1 times bypasspilot gas valve VAS 1 B 4 times O-rings C 4 times spacer sleeves D 4 times connection parts E 1 times mounting aidBypass valve VAS 1 F 2 times connection pipes if the bypass valve has a blind flange

at the outlet sidePilot gas valve VAS 1 F 1 times connection pipe 1 times sealing plug if the pilot gas valve

has a threaded flange at the outlet side

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 39

2

3

456

810

20

30

405060

80100

∆p [m

bar]

005 01 02 03 05 08 1 2 3 4 51

3

2

Qn [m3h]

1

01

02

03

0405

08

003

002

6 8 10

005 01 02 03 05 08 1 2 3 4 5003 6 8 10

20

005 01 02 03 05 08 1 2 3 4 5003 6 8 10 20

30

∆p [i

nch

WC]

1

2

3

456

810

20

30

40

04

004

006

00801

02

03

0506

08

Qn [SCFH]10 40 60 100 200 3001 500 10002 3 4 5

120 306 8

21 3 4 5 6 7 8 910

8 3 3 Flow rate

The characteristic flow rate curves have been measured for bypass valve VAS 1 with connection pipe diameter 1 to 10 mm (004 to 04) and for the pilot gas valve with 10 mm (04) connection pipe

Bypass valve connection pipe diameter [mm]

Pilo

t gas

val

ve 1

0 m

m (0

4)

conn

ectio

n pi

pe d

iam

eter

Accessories gt Bypass valvepilot gas valve VAS 1

= natural gas (ρ = 080 kgm3) = propane (ρ = 201 kgm3) = air (ρ = 129 kgm3)

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 40

Accessories

8 4 Bypass valvepilot gas valve VBY 8 for VADVAGVAHVAV 1

B

C

AVBY 8

VAx 1

55

(217)40(157)

70 (276)

80(315)

Rp frac14(pilot gas valve)

For mounting on VAD VAG VAH VAV 1 and double solenoid valve VCD VCG VCH VCV 1

8 4 1 Scope of delivery VBY 8I as bypass valveA 1 times bypass valve VBY 8IB 2 times retaining screws with 4 times O-rings both retaining screws

have a bypass orificeC 1 times grease for o-rings

8 4 2 Scope of delivery VBY 8R as pilot gas valveA 1 times pilot gas valve VBY 8RB 2 times retaining screws with 5 x O-rings one retaining screw

has a bypass orifice (2 x O-rings) the other does not (3 x O-rings)

C 1 times grease for O-rings

8 4 3 SelectionType I R W Q K 6L -R -L E B D 05

VBY 8

Order exampleVBY 8RW6L-LED

8 4 4 Type codeCode DescriptionVBY Gas solenoid valve8 Nominal sizeIR

For internal gas pick-up as bypass valveFor external gas pick-up as pilot gas valve

KQW

Mains voltage 24 V DC Mains voltage 120 V AC 5060 HzMains voltage 230 V AC 5060 Hz

6L Electrical connection via plug and socket with LED-R-L

Attachment side of main valve right-hand sideAttachment side of main valve left-hand side

EB

Attached to the VAxEnclosed (separate packing unit)

05D

Nozzle diameter = 05 mm (002)Flow adjustment

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 41

2

01

02

03

05

081

3

456

810

20

30

405060

80100

∆p [m

bar]

1

3

201 02 03 05 1 2 3001 003 4

Qn [m3h]

02 03 05 1 2

01 02 05

002 006

002

002 006 1

0010006 005 01

001

0003

0006 2 3

VBY 8DVBY 805

∆p [i

nch

WC]

1

2

3

456

810

20

30

40

040506

08

1

Qn [SCFH]10 40 60 1005 2081 2 30402

01

02

03

004005006

008

Adjusting range

8 4 5 Flow rateVBY 8 D

+

-

The flow rate can be set by turning the flow rate restrictor (4 mm016 Allen screw) frac14 of a turn Flow rate 10 to 100

VBY 8 05The flow is routed through a 05 mm (002) nozzle and thus has a fixed characteristic flow rate curve Adjustment is not possible

8 4 6 Technical dataInlet pressure pu max 500 mbar (7 psig)Ambient temperature 0 to +60degC (32 to 140degF) no condensation permittedStorage temperature 0 to +40degC (32 to 104degF) no condensation permittedPower consumption 24 V = 8 W 120 V = 8 W 230 V = 95 WEnclosure IP 54

Accessories gt Bypass valvepilot gas valve VBY 8 for VADVAGVAHVAV 1

= natural gas (ρ = 080 kgm3) = propane (ρ = 201 kgm3) = air (ρ = 129 kgm3)

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 42

TC 116VB C

56(22)

49(193)

27(106)

A

A

VCx 1 VCx 2VCx 3

8 5 Tightness control TC 116Vfor VAx 1 ndash 3An adapter plate is required to attach the tightness control to the right- or left-hand side of the pressure regulator with gas solenoid valveScope of delivery A 1 times adapter plate B 2 times O-rings C 2 times retaining screwsFor attachment to left-hand side Order No 74922391 right-hand side Order No 74921995

8 6 Pressure test pointsTest points to check the inlet pressure pu and outlet pressure pdScope of delivery 1 x pressure test points with 1 x profiled sealing rings Order No 74923390

8 7 Cable gland setWhen wiring a double solenoid valve with pressure regula-tor VCx the connection boxes are to be connected using a cable gland setThe cable gland set can only be used if the connection boxes are at the same height and on the same side and if both valves are equipped either with or without a proof of closure switchVA 1 Order No 74921985 VA 2 Order No 74921986 VA 3 Order No 74921987

Accessories

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 43

A B

D

C

Accessories

8 9 Differential pressure orifice

Size PipeDN

Differential pressure orifi cewith outlet dia

1 15 17 mm 0671 20 25 mm 0981 25 30 mm 1182 40 46 mm 1813 50 58 mm 228

If pressure regulator VADVAGVAV 1 is retrofitted upstream of gas solenoid valve VAS 1 a DN 25 differential pressure orifice with outlet opening d = 30 mm (118) must be inserted at the outlet of the pressure regulatorIn the case of pressure regulator VAx 115 or VAx 120 the DN 25 differential pressure orifice must be ordered separately and retrofitted Order No 74922240

8 8 Seal set VA 1 ndash 3VA 1 Order No 74921988 VA 2 Order No 74921989 VA 3 Order No 74921990Scope of deliveryA 1 times double block seal B 2 times O-rings (flange) C 2 times O-rings (pressure switch) for pressure test pointscrew plug D 2 times sealing rings (flat sealing) and 2 times profiled sealing rings

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 44

BA

C

pd-

8 11 Attachment blockFor locked installation of pressure gauge and other acces-soriesScope of delivery A 1 times attachment block B 2 times self-tapping screws for installation C 2 times O-rings

Accessories

8 10 Retaining frameIn the event that a pressure regulator VAx is installed at a later point upstream of a gas solenoid valve VAS a measur-ing orifice VMO or a fine-adjusting valve VMV the retaining frame must be fitted at the inlet of the second device in order to fasten the differential pressure orifice at the regulator outlet Order the retaining frame separatelyRetaining frame for Size 1 Order No 74923029 Size 2 Order No 74923030 Size 3 Order No 74923031

8 12 Gas control lineFine-adjusting valve VMV can be installed on the flow rate regulator VAH for fine adjustment of the gas flow rateThe gas control line for gas outlet pressure pd- is available with 2 18 compression fittingsSize 1 Order No 74924458 Size 2 Order No 74924459

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 45

8 13 Measuring orifice VMOThe measuring orifice VMO is designed to reduce the gas and air flow rates and is installed downstream of the valVario control The measuring orifice is available with Rp internal thread (NPT internal thread) or flange to ISO 7005See wwwdocuthekcom Elster Kromschroumlder Krom-schroumlder LBE Products 03 Valves and butterfly valves valVario accessories Type of document Technical Informa-tion VMO

Accessories

8 14 Filter module VMFUsing the filter module VMF the gas flow upstream of the gas solenoid valve VAS and the airgas ratio control is cleaned The filter module is available with Rp internal thread (NPT internal thread) or flange to ISO 7005 and can also be supplied with fitted pressure switch as an optionSee wwwdocuthekcom Elster Kromschroumlder Krom-schroumlder LBE Products 03 Valves and butterfly valves valVario accessories Type of document Technical Informa-tion VMF

8 15 Fine-adjusting valve VMVThe flow rate is set using the fine-adjusting valve VMV The fine-adjusting valve is available with Rp internal thread (NPT internal thread) or flange to ISO 7005See wwwdocuthekcom Elster Kromschroumlder Krom-schroumlder LBE Products 03 Valves and butterfly valves valVario accessories Type of document Technical Infor-mation VMV

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 46

9 Technical dataGas types natural gas LPG (gaseous) biologically produced methane (max 01 -by-vol H2S) or clean air other gases on request The gas must be clean and dry in all temperature conditions and must not contain condensateCE and FM approved UL listed max inlet pressure pu 10 ndash 500 mbar (4 ndash 200 WC) FM approved (230 V AC 120 V AC 24 V DC) non opera-tional pressure 700 mbar (10 psig)ANSICSA approved (230 V AC 120 V AC 24 V DC) up to 350 mbar (5 psig)Opening time of the solenoid valve quick opening le 05 s Closing time quick closing lt 1 sMedium and ambient temperatures -20 to +60degC (-4 to +140degF) no condensation permittedStorage temperature -20 to +40degC (-4 to +104degF)Enclosure IP 65Valve housing aluminium valve seal NBRConnection flanges with internal thread Rp to ISO 7-1 NPT to ANSIASMESafety valve Class A to EN 161 Factory Mutual Research Class 7400 Process Control Valves (230 V AC 120 V AC 24 V DC) ANSI Z2121 and CSA 65 ANSI Z2118 and CSA 63Control class A to EN 88-1Control range up to 101

Mains voltage 230 V AC +10-15 5060 Hz 200 V AC +10-15 5060 Hz 120 V AC +10-15 5060 Hz 100 V AC +10-15 5060 Hz 24 V DC plusmn20Duty cycle 100Power factor of the solenoid coil cos φ = 09Power consumption

Type Voltage Power

VAx 1

24 V DC 25 W ndash100 V AC 25 W (26 VA)120 V AC 25 W (26 VA)200 V AC 25 W (26 VA)230 V AC 25 W (26 VA)

VAx 2 VAx 3

24 V DC 36 W ndash100 V AC 36 W (40 VA)120 V AC 40 W (44 VA)200 V AC 40 W (44 VA)230 V AC 40 W (44 VA)

VBY24 V DC 8 W ndash

120 V AC 8 W ndash230 V AC 95 W ndash

Cable gland M20 times 15Electrical connection cable with max 25 mm2 (AWG 12) or plug with socket to EN 175301-803

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 47

Position indicator contact rating

Type Voltage Min current(resistive load)

Max current(resistive load)

VAxS VCxS 12 ndash 250 V AC 5060 Hz 100 mA 3 AVAxG VCxG 12 ndash 30 V DC 2 mA 01 A

Position indicator switching frequency max 5 times per minute

Switching current [A]

Switching cyclescos φ = 1 cos φ = 06

01 500000 50000005 300000 250000

1 200000 1000003 100000 ndash

Limited to max 200000 cycles for heating systems

9 1 VADOutlet pressure pd VAD-25 25 ndash 25 mbar (1 ndash 10 WC) VAD-50 20 ndash 50 mbar (8 ndash 20 WC) VAD-100 35 ndash 100 mbar (14 ndash 40 WC)Combustion chamber control pressure psc (connection psa)

-20 to +20 mbar (-78 to +78 WC)

VAD

pu

pd

(psa)

9 2 VAGOutlet pressure pd 05 ndash 100 mbar (02 ndash 40 WC)Air control pressure psa 05 ndash 100 mbar (02 ndash 40 WC)

Adjusting range at low fire plusmn5 mbar (plusmn2 WC)Transmission ratio of gas to air 11The inlet pressure must always be higher than the air control pressure psa + pressure loss ∆p + 5 mbar (2 WC)

VAGpd

pu

psa

psa

VAGK 1 x 18 coupling for plastic hose (internal dia 39 mm (015) external dia 61 mm (024)) or VAGE 1 x 18 compression fitting for 6 times 1 tube or VAGA 1 x NPT 18 adapter or VAGN zero governor with breathing orifice

9 3 VAH VRHAir control pressure psa 06 ndash 100 mbar (024 ndash 40 WC) Differential air pressure ∆psa (psa - psa-) 06 ndash 50 mbar (024 ndash 197 WC) Differential gas pressure ∆pd (pd - pd-) 06 ndash 50 mbar (024 ndash 197 WC)Transmission ratio of gas to air 11The inlet pressure must always be higher than the differen-tial air pressure ∆psa + pressure loss ∆p + max gas pres-sure on burner + 5 mbar (2 WC)Adjusting range at low fire plusmn5 mbar (plusmn2 WC)

Technical data

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 48

VAHVRH

pd-

pu

psa-

psa

Connection of the air control pressure psaVAHE VRHE 3 x 18 compression fitting for 6 times 1 tube or VAHA VRHA 3 x NPT 18 adapter

9 4 VAVOutlet pressure pd 05 ndash 30 mbar (02 ndash 117 WC)Air control pressure psa 04 ndash 30 mbar (015 ndash 117 WC)Combustion chamber control pressure psc

-20 to +20 mbar (-78 to +78 WC)Min control pressure differential psa - psc 04 mbar (015 WC)Min pressure differential pd - psc 05 mbar (02 WC)Adjusting range at low fire plusmn15 mbar (plusmn06 WC)Transmission ratio of gas to air 061 to 31The inlet pressure pu must always be higher than the air control pressure psa times transmission ratio V + pressure loss ∆p + 15 mbar (06 WC)

pu

pd psapsc

VAV

VAVK 2 x plastic hose couplings (internal dia 39 mm (015) external dia 61 mm (024)) or VAVE 2 x 18 compression fitting for 6 times 1 tube or VAVA 2 x NPT 18 adapter

Technical data

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 49

9 5 Safety-specific characteristic values for VAx 1 ndash 3For SILSuitable for Safety Integrity Level SIL 1 2 3

Diagnostic coverage DC 0

Type of subsystem Type A to EN 61508-2 74312

Operating mode High demand mode pursu-ant to EN 61508-4 3512

For PLSuitable for Performance Level PL a b c d e

Category B 1 2 3 4Common cause failure CCF gt 65Application of essential safety requirements Satisfied

Application of tried-and-tested safety requirements Satisfied

For SIL and PL

B10d value

Operating cyclesVAD VAG VAV VAH 1 10094360VAD VAG VAV VAH 2 8229021VAD VAG VAV VAH 3 6363683

Hardware fault tolerance (1 valve) HFT 0

Hardware fault tolerance (2 valves) HFT 1

Safe failure fraction SFF gt 90Fraction of undetected com-mon cause failures β ge 2

Max service life under operating conditions10 years after date of production plus max 12 year in stor-age prior to first use or once the given number of operating cycles has been reached depending on which is achieved firstThe devices are suitable for single-channel systems (HFT = 0) up to SIL 2PL d and up to SIL 3PL e when two re-dundant valves are installed in a double-channel architecture (HFT = 1) provided that the complete system complies with the requirements of EN 61508ISO 13849

For a glossary of terms see page 53 (Glossary)

Technical data

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 50

nop 1hnop 1a

sB10d

T10d aPFHD (1 VAx) 1h

PFHD (2 VAx) 1h

PFDavg (1 VAx)

PFDavg (2 VAx)

Technical data gt Safety-specific characteristic values for VAx 1 ndash 3

9 5 1 Determining the PFHD value the λD value and the MTTFd value

PFHD = λD = x nop= 1MTTFd

01B10d

PFDavg = x λD x 24 x 365 x T10d 12

Type

Cycle time

suitable for

suitable for

PFHD = Probability of dangerous failure (HDM = high de-mand mode) [1hour]PFDavg = Average probability of dangerous failure on de-mand (LDM = low demand mode)λD = Mean dangerous failure rate [1hour]MTTFd = Mean time to dangerous failure [hours]nop = Demand rate (mean number of annual operations) [1hour]

9 5 2 Calculating the PFHD and PFDavg

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 51

VAD VAG VAH VAV

H1

Rp frac14(NPT frac14)

H2

E

LF

F

H4

H3

B

VAxS VAxF

L2G

G

Technical data

9 6 Dimensions

Type

Connec-tion Dimensions

WeightRpNPT DN

L L2 E F G H1 H2 H3 H4 Bmm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch kg lbs

VAx 115 12 15 75 29 ndash ndash 75 29 15 06 ndash ndash 143 56 82 32 161 63 117 46 97 38 18 40VAH 115 12 15 75 29 ndash ndash 75 29 15 06 ndash ndash 143 56 100 39 161 63 135 53 97 38 2 44VAx 120 34 20 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 82 33 161 63 117 46 97 38 19 42VAH 120 34 20 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 100 39 161 63 135 53 97 38 21 46VAx 125 1 25 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 82 33 161 63 117 46 97 38 19 42VAH 125 1 25 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 100 39 161 63 135 53 97 38 21 46VAx 240 112 40 128 50 200 79 85 33 29 11 66 26 170 67 112 44 191 75 162 64 125 49 44 97VAH 240 112 40 128 50 200 79 85 33 29 11 66 26 170 67 132 52 191 75 182 72 125 49 47 104VAx 350 2 50 155 61 230 91 85 33 36 14 74 29 180 70 135 53 201 79 196 77 160 63 61 134VAH 350 2 50 155 61 230 91 85 33 36 14 74 29 180 70 156 61 201 79 217 85 160 63 64 141

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 52

10 Converting unitssee wwwadlatusorg

11 Maintenance cyclesAt least once per annum at least twice per annum for biologi-cally produced methaneIf the flow rate drops clean the strainer

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 53

12 Glossary12 1 Diagnostic coverage DCMeasure of the effectiveness of diagnostics which may be determined as the ratio between the failure rate of detected dangerous failures and the failure rate of total dangerous failuresNOTE Diagnostic coverage can exist for the whole or parts of a safety-related system For example diagnostic cover-age could exist for sensors andor logic system andor final elements Unit see EN ISO 13849-12008

12 2 Mode of operationHigh demand mode or continuous modeOperating mode where the frequency of demands for opera-tion made on a safety-related system is greater than one per year or greater than twice the proof-test frequencysee EN 61508-42008

12 3 CategoryClassification of the safety-related parts of a control system in respect of their resistance to faults and their subsequent behaviour in the fault condition and which is achieved by the structural arrangement of the parts fault detection andor by their reliability see EN ISO 13849-12008

12 4 Common cause failure CCFFailures of different items resulting from a single event where these failures are not consequences of each othersee EN ISO 13849-12008

12 5 Fraction of undetected common cause failures β Fraction of undetected failures of redundant components due to a single event whereby these failures are not based on mutual causesNOTE β is expressed as a fraction in the equations and as a percentage elsewheresee EN 61508-62010

12 6 B10d valueMean number of cycles until 10 of the components fail dan-gerouslysee EN ISO 13849-12008

12 7 T10d valueMean time until 10 of the components fail dangerouslysee EN ISO 13849-12008

12 8 Hardware fault tolerance HFTA hardware fault tolerance of N means that N + 1 is the mini-mum number of faults that could cause a loss of the safety functionsee IEC 61508-22010

12 9 Mean dangerous failure rate λD Mean rate of dangerous failures during operation time (T10d) Unit 1hsee EN ISO 13849-12008

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 54

12 10 Safe failure fraction SFFFraction of safe failures related to all failures which are as-sumed to appearsee EN 13611A22011

12 11 Probability of dangerous failure PFHD Value describing the likelihood of dangerous failure per hour of a component for high demand mode or continuous mode Unit 1hsee EN 13611A22011

12 12 Mean time to dangerous failure MTTFd Expectation of the mean time to dangerous failuresee EN ISO 13849-12008

12 13 Demand rate nop Mean number of annual operationssee EN ISO 13849-12008

12 14 Average probability of dangerous failure on demand PFDavg (LDM = 1 ndash 10 switching cyclesyear)Average probability of a dangerous failure of the safety function on demand (LDM = low demand mode)see EN 61508-6

Glossary

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415

Finally we are offering you the opportunity to assess this ldquoTechnical Information (TI)rdquo and to give us your opinion so that we can improve our documents further and suit them to your needs

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Remarks

(Adobe Reader 7 or higher required) wwwadobecom

Elster GmbH Postfach 2809 middot 49018 Osnabruumlck Strotheweg 1 middot 49504 Lotte (Buumlren) GermanyT +49 541 1214-0 F +49 541 1214-370 infokromschroedercomwwwkromschroedercom

The current addresses of our international agents are available on the Internetwwwkromschroederdeindexphpid=718ampL=1

We reserve the right to make technical modifications in the interests of progressCopyright copy 2015 Elster GmbH All rights reserved

Contact

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0325

0530

  • Pressure regulators with solenoid valve VAD VAG VAV VAH
  • Flow rate regulator VRH
  • Pressure regulators with double solenoid valve VCD VCG VCV VCH
  • Contents
  • 1 Application
    • 11 Examples of application
      • 111 Constant pressure control
      • 112 Constant pressure control with two gas solenoid valves
      • 113 Constant pressure control with max pressure switch
      • 114 Constant pressure control with non-controlled pilot gas outlet
      • 115 Modulating control
      • 116 Modulating control with two gas solenoid valves
      • 117 Modulating control with two gas solenoid valves and inlet pressure switch
      • 118 HighLow control
      • 119 Zero pressure control
      • 1110 Staged flow rate control
      • 1111 Continuous or staged flow rate control
      • 1112 Modulating control with variable airgas ratio control with gas solenoid valve
      • 1113 Modulating control in residential heat generation
          • 2 Certification
          • 3 Function
            • 31 VAD VAG VAH VRH VAV
              • 311 Pressure regulator for gas VAD
              • 312 Airgas ratio control VAG
              • 313 Flow rate regulators VAH VRH
              • 314 Variable airgas ratio control VAV
              • 315 Pressure regulator with gas solenoid valve VAxS position indicator with visual indicator
                • 32 Animation
                • 33 Connection diagram
                  • 331 VAx with M20 cable gland
                  • 332 VAx with plug
                  • 333 VAS with VADVAGVAHVAV with M20 cable gland
                  • 334 VAS with VADVAGVAHVAV with plug
                      • 4 Replacement possibilities for MODULINE pressure regulators with gas solenoid valve
                        • 41 GVS GVI GVIB GVR and GVRH are to be replaced by VAD VAG VAG+VAS VAH and VAV
                          • 5 Flow rate
                            • 51 Selection example for VAD
                              • 511 Calculate VAD
                                • 52 Selection example for VAG VAH VRH VAV
                                  • 521 CalculateVAG VxHVAV
                                    • 53 Selection example for zero governor VAGN
                                      • 531 Calculate VAGN
                                          • 6 Selection
                                            • 61 Selection table for pressure regulator with solenoid valve VAD
                                            • 62 Type code for VAD
                                            • 63 Selection table for airgas ratio control with solenoid valve VAG flow rate regulators VAH VRH
                                            • 64 Type code for VAG VAH VRH
                                            • 65 Selection table for variable airgas ratio control with solenoid valve VAV
                                            • 66 Type code for VAV
                                            • 67 Accessories
                                              • 7 Project planning information
                                                • 71 Installation
                                                  • 711 Installation position
                                                    • 72 Setting the low-fire rate on VAG VAH VRH VAV
                                                    • 73 Setting the high-fire rate on VAV
                                                      • 731 Calculation
                                                          • 8 Accessories
                                                            • 81 Gas pressure switch DGVC for VAx VRH
                                                            • 82 Gas pressure switch DGVCT for VAxT VRHT
                                                            • 83 Bypass valvepilot gas valve VAS 1
                                                              • 831 VAS 1 attached to VADVAGVAHVAV 1
                                                              • 832 VAS 1 attached to VADVAGVAHVAV 2 VADVAGVAHVAV 3
                                                              • 833 Flow rate
                                                                • 84 Bypass valvepilot gas valve VBY 8 for VADVAGVAHVAV 1
                                                                  • 841 Scope of delivery VBY 8I as bypass valve
                                                                  • 842 Scope of delivery VBY 8R as pilot gas valve
                                                                  • 843 Selection
                                                                  • 844 Type code
                                                                  • 845 Flow rate
                                                                  • 846 Technical data
                                                                    • 85 Tightness control TC 116V
                                                                    • 86 Pressure test points
                                                                    • 87 Cable gland set
                                                                    • 88 Seal set VA 1thinspndashthinsp3
                                                                    • 89 Differential pressure orifice
                                                                    • 810 Retaining frame
                                                                    • 811 Attachment block
                                                                    • 812 Gas control line
                                                                    • 813 Measuring orifice VMO
                                                                    • 814 Filter module VMF
                                                                    • 815 Fine-adjusting valve VMV
                                                                      • 9 Technical data
                                                                        • 91 VAD
                                                                        • 92 VAG
                                                                        • 93 VAH VRH
                                                                        • 94 VAV
                                                                        • 95 Safety-specific characteristic values for VAx 1thinspndashthinsp3
                                                                          • 951 Determining the PFHD value the λD value and the MTTFd value
                                                                          • 952 Calculating the PFHD and PFDavg
                                                                            • 96 Dimensions
                                                                              • 10 Converting units
                                                                              • 11 Maintenance cycles
                                                                              • 12 Glossary
                                                                                • 121 Diagnostic coverage DC
                                                                                • 122 Mode of operation
                                                                                • 123 Category
                                                                                • 124 Common cause failure CCF
                                                                                • 125 Fraction of undetected common cause failures β
                                                                                • 126 B10d value
                                                                                • 127 T10d value
                                                                                • 128 Hardware fault tolerance HFT
                                                                                • 129 Mean dangerous failure rate λD
                                                                                • 1210 Safe failure fraction SFF
                                                                                • 1211 Probability of dangerous failure PFHD
                                                                                • 1212 Mean time to dangerous failure MTTFd
                                                                                • 1213 Demand rate nop
                                                                                • 1214 Average probability of dangerous failure on demand PFDavg
                                                                                  • Feedback
                                                                                  • Contact
                                                                                      1. naechste_Seite 24
                                                                                      2. naechste Seite 18
                                                                                      3. naechste Seite 6
                                                                                      4. naechste Seite 16
                                                                                      5. naechste Seite 14
                                                                                      6. naechste Seite 25
                                                                                      7. naechste_Seite 11
                                                                                      8. naechste_Seite 17
                                                                                      9. fbArbeitspunkt_Min Ja
                                                                                      10. fbArbeitspunkt Ja
                                                                                      11. ftProgramm Standard-Programm
                                                                                      12. fz_kv
                                                                                      13. fz_pe 80
                                                                                      14. fz_pG 60
                                                                                      15. fzDelta_p_Soll 20
                                                                                      16. ftEinheit_Druck mbar
                                                                                      17. fatTyp [115]
                                                                                      18. fbArbeitspunkt_Min_2 Ja
                                                                                      19. fbArbeitspunkt_2 Ja
                                                                                      20. ftRegler_Typ VAG
                                                                                      21. ftProgramm_2 Standard-Programm
                                                                                      22. fz_kv_2
                                                                                      23. fatMedium [08]
                                                                                      24. fzDichte 08
                                                                                      25. ftEinheit_Dichte kgm3
                                                                                      26. fzV_Norm 30
                                                                                      27. ftEinheit_Volstrom m3h
                                                                                      28. fz_pe_2 80
                                                                                      29. fz_pG_2 60
                                                                                      30. fzDelta_p_Soll_2 20
                                                                                      31. ftEinheit_Druck2 [mbar]
                                                                                      32. ftEinheit_Geschw [ms]
                                                                                      33. fatTyp_2 [10954451150103322]
                                                                                      34. fbArbeitspunkt_Min_3 Ja
                                                                                      35. fbArbeitspunkt_3 Ja
                                                                                      36. ftProgramm_3 Standard-Programm
                                                                                      37. fz_kv_3
                                                                                      38. fz_pe_3 20
                                                                                      39. fz_pG_3 0
                                                                                      40. fzDelta_p_Soll_3 20
                                                                                      41. fatTyp_3 [123]
                                                                                      42. fatSchaltleistung [6363683]
                                                                                      43. fz_nop_Stunde 1
                                                                                      44. fz_nop_Jahr 8760
                                                                                      45. fzZyklus 3600
                                                                                      46. fzB10d 6363683
                                                                                      47. fzT10d 10
                                                                                      48. fzPFHd_1V 15714170551864384e-8
                                                                                      49. fzPFDavg_1V
                                                                                      50. ftGeeignet_1V PL d SIL 2
                                                                                      51. fzPFHd_2V 33505832253532625e-10
                                                                                      52. fzPFDavg_2V
                                                                                      53. ftGeeignet_2V PL e SIL 3
                                                                                      54. ftUebersicht Off
                                                                                      55. ftVerstaendlichkeit Off
                                                                                      56. ftFehlende_Info
                                                                                      57. ftUmfang Off
                                                                                      58. ftVerwendung_1 Off
                                                                                      59. ftVerwendung_2 Off
                                                                                      60. ftVerwendung_3 Off
                                                                                      61. ftVerwendung_4 Off
                                                                                      62. ftNavigation Off
                                                                                      63. ftTaetigkeitsbereich Off
                                                                                      64. ftBemerkung
                                                                                      65. Michael Rehkamp Elster Kromschroumlder>btnSenden
Page 7: VAD, VAG, VAV, VAH, VRH, VCD, VCG, VCV, VCH · PDF fileVAD, VAG, VAH, VAV, VRH, VCD, VCG, VCV, VCH · Edition 04.15 6 VAD VAD VAS 1 .1 Examples of application 1 .1 .1 Constant pressure

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 7

VAD

DGCmin DGCmax

VASPZL PZH

DGCmin DGCmax

VADVAS

VAS

PZL PZH

1 1 3 Constant pressure control with max pressure switchIn this example the minimum inlet pres-sure pu and the maximum outlet pres-sure pd are monitored with the pressure switches DGC The simple attachment of the pressure switch module makes installation easier

1 1 4 Constant pressure control with non-controlled pilot gas outletIn this application the pilot burner is supplied with a high inlet pressure via the pilot gas outlet The simple attach-ment of the bypass valve module makes installation easier The minimum inlet pressure pu and the maximum outlet pressure pd are monitored with the pres-sure switches DGC

Application gt Examples of application

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 8

psa

psa

VAG

MIC + BVA

psa

psaM

IC + BVA

VASVAG

1 1 5 Modulating controlThe gas outlet pressure pd is con trolled via the airgas ratio control with gas so-lenoid valve VAG The gas outlet pres-sure pd follows the changing air control pressure psa The ratio of gas pressure to air pressure remains constant The VAG is suitable for a control range up to 101If a second solenoid valve is used up-stream of the VAG this complies with the requirements of EN 746-2 for two Class A valves connected in series

1 1 6 Modulating control with two gas solenoid valvesThe gas outlet pressure pd is con trolled via the airgas ratio control with gas so-lenoid valve VAG The gas outlet pres-sure pd follows the changing air control pressure psa The ratio of gas pressure to air pressure remains constant The VAG is suitable for a control range up to 101The gas line is two Class A shut-off valves connected in series in accordance with the requirements of EN 746-2

Application gt Examples of application

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 9

DGCmin

PZL

psa

psa

M

IC + BVA

VAS

VAG

psa

DGCmin

PZL

psa

M

IC 40 + BVA

VAS

VAG

VAS 1

1 1 7 Modulating control with two gas solenoid valves and inlet pressure switchIn this case the minimum inlet pressure pu is monitored by the pressure switch DGC The simple attachment of the pressure switch module makes instal-lation easier

1 1 8 HighLow controlAt high fire the gas outlet pressure pd follows the air control pressure psa The ratio of gas pressure to air pressure re-mains constant Low fire is determined via the bypass valve VAS 1 Here as well the simple attachment of the bypass valve module makes installation easier

Application gt Examples of application

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 10

Venturi

DGCmin

PZL

M

IC + BVA

VASVAGN

1 1 9 Zero pressure controlIn this application the control air pres-sure is the atmospheric air pressure The air flow rate generates a negative pressure in the gas pipe via the Venturi This negative pressure is compensated by the airgas ratio control with gas solenoid valve VAGN The greater the negative pressure the greater the gas flow rate

Application gt Examples of application

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 11

BVHM + MB7L

VMV

ECOMAX

VASN

BCU BZA

Prozess SteuerungProcess Control (PCC)

AKT

psa-

psa

pd-

VAH

1 1 10 Staged flow rate controlThis application shows the VAH on a self recuperative burnerThe pressure loss in the recuperator de-pends on the furnace or kiln temperature When the furnace or kiln temperature is increased (at a constant air supply pres-sure) the flow rate drops This change in the air flow rate is measured by the orifice and the VAH changes the gas volume accordinglyThe air index (lambda) can be set using the fine-adjusting valve VMV

Application gt Examples of application

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 12

M

IC + BVA

VMV

VMO

VAH

VAS

psa-psa

pd-

psa

psc

DGCmin

PZL

psa

psc

M

IC + BVA

VAS VAV

1 1 11 Continuous or staged flow rate controlThis application shows flow rate control for a radiant tube burner system with plug-in recuperator for air preheatingThere are temperature-dependent air pressure losses in the recuperator The ratio of gas pressure to air pressure does not remain constant The fluctuating air flow rate is measured at the measuring orifice VMO and the VAH controls the gas flow rate proportionallyThe air index (lambda) can be set using the fine-adjusting valve VMV

Application gt Examples of application

1 1 12 Modulating control with variable airgas ratio control with gas solenoid valveThe ratio of gas pressure to air pressure can be adjusted infinitely between 061 and 31 Pressure fluctuations in the com-bustion chamber can be compensated via the combustion chamber control pressure psc see page 15 (Function)

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 13

DGCmin

PZL

psa

psc

VAS VAV

1 1 13 Modulating control in residential heat generationThis application shows the variable airgas ratio control with solenoid valve VAV fitted to a modulating-controlled forced draught burnerThe combustion air volume is set via a butterfly valve for air or by adjusting the fan speed

Application gt Examples of application

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 14

2 CertificationCertificates ndash see Docuthek

VAD VAG VAV VAH certified to SIL and PL

For systems up to SIL 3 pursuant to EN 61508 and PL e pursu-ant to ISO 13849

VAD VAG VAV VAHEU certified pursuant to

ndash Gas Appliances Directive (2009142EC) in conjunction with EN 13611 EN 161 EN 88-1 EN 126 and EN 1854

Meets the requirements of thendash Low Voltage Directive (200695EC)ndash EMC Directive (2004108EC)

VAD VAG VAV VAH FM approved

Factory Mutual Research Class 7400 Process Control Valves Designed for applications pursuant to NFPA 85 and NFPA 86 www approvalguide com

VAD VAG ANSICSA approved

American National Standards InstituteCanadian Standards Association ndash ANSI Z21 21CSA 6 5 ANSI Z21 18 and CSA 6 3

wwwcsagrouporg ndash Class number 3371-83 (natural gas LPG) 3371-03 (natural gas propane)

VAD VAG VAV UL listed

Underwriters Laboratories ndash UL 429 ldquoElectrically operated valvesrdquo wwwulcom Tools (at the bottom of the page) Online Certifications Directory

VAD VAG VAV AGA approved

AGA

Australian Gas Association Approval No 5319 httpwww aga asn auproduct_directory

Eurasian Customs Union

The product VAD VAG VAV VAH VCD VCG VCV VCH meets the technical specifications of the Eurasian Customs Union (the Russian Federation Belarus Kazakhstan)

Approval does not apply for 100 V AC and 200 V AC

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 15

3 Function3 1 VAD VAG VAH VRH VAVThe regulator is closed when it is disconnected from the power supplyOpening connect the system to the electrical power supply (alternating voltage will be rectified) The blue LED lights up The coilrsquos magnetic field pulls the armature upwards and clears the supply nozzle for the gas inlet pressure pu The gas passes through the internal impulse tube to the adjustment diaphragm and then pushes the valve disc open The outlet pressure is applied to the servo diaphragm via the internal feedback

The servo regulator then maintains a set constant outlet pres-sure pd

3 1 1 Pressure regulator for gas VADThe nominal outlet pressure pd is defined by the control spring

Servoregulator

Valve

Armature

Valve disc

Adjustmentdiaphragm

Servodiaphragm

Internalfeedback

Controlspring

Solenoid coil

Supplynozzle

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 16

3 1 2 Airgas ratio control VAGThe airgas ratio control VAG controls the outlet pressure pd depending on the variable air control pressure psaThe ratio of gas pressure to air pressure remains constant 11 The VAG is suitable for a control range up to 101If the burner operates at low-fire rate the gasair mixture can be changed by adjusting the zero point spring ldquoNrdquo

Function

psa

pd

Zero point setting N zero point spring

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 17

Function

3 1 3 Flow rate regulators VAH VRHThe flow rate regulators VAH VRH control the gas flow rate depending on the variable air flow rate The ratio of gas flow rate to air flow rate remains constant If the burner operates at low-fire rate the gasair mixture can be changed by adjusting the zero point spring ldquoNrdquoIn addition flow rate regulator VAH is designed as a gas solenoid valve and shuts off the gas or air supply safely

psa

psa-

pd-

pdInternal feedback

Zero point setting N zero point spring

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 18

3 1 4 Variable airgas ratio control VAVThe servo regulator maintains a set constant outlet pressure pd The variable airgas ratio control VAV controls the outlet pressure pd depending on the variable air control pressure psa The ratio of gas pressure to air pressure remains constantThe settings N and V can be changed and read off from both sides of the unit using the adjusting screwsThe ratio of gas pressure to air pressure at low-fire rate can be changed by adjusting the zero point setting N By turning the adjusting screw ldquoNrdquo the force of the zero point spring and thus the zero point is changed by plusmn 15 mbar (06 WC) see page 34 (Project planning information)The high-fire rate is set by turning the adjusting screw ldquoVrdquo until the required flue gas values are achieved see page 34 (Project planning information) The ratio of gas pressure to air pressure can be set from 061 to 31The settings N and V influence each other and the adjustment process must be repeated if necessaryThe outlet pressure pd is applied to the servo diaphragm via the internal feedback The combustion chamber control pres-sure psc is transmitted to the space under the air and servo diaphragms via an impulse lineThe pressure differential psa - psc is achieved on the air diaphragm and the pressure differential pd - psc on the servo diaphragm This ensures that pressure fluctuations in the combustion cham-ber can be compensated The flue gas values remain constant in the case of fluctuations in the combustion chamber pressure (pd - psc) = (psa - psc) times V + N

Function

pdpsc

psa

Air diaphragm

Transmission ratio V

Zero point setting N zero point spring

Internalfeedback

Adjustment diaphragm

Servo diaphragm

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 19

1 COM

2 NO

3 NC

3 1 5 Pressure regulator with gas solenoid valve VAx S position indicator with visual indicatorOpening when the pressure regulator is opened the posi-tion indicator switches The visual indicator is activated The ldquoopenrdquo signal is marked in red The double valve seat opens to release the volume of gasClosing the pressure regulator VAx is disconnected from the voltage supply and the closing spring presses the double valve disc on to the valve seat The position indicator is actuated The visual indicator is white for ldquoclosedrdquoThe actuator cannot be rotated on a pressure regulator with a position indicator and a visual indicatorNOTE NFPA 86 ndash the following must be taken into account as soon as the capacity of the pilot or main burner exceeds 117 kW (400000 BTUh) safety shut-off valve VASS must be fitted with a proof of closure overtravel switch with a visual position indicator and the burner-side pressure regulator with gas solenoid valve VAxS must also be fitted with a position indicator with visual indicator The closed position can be verified using the proof of closure switch of the gas solenoid valve VASS

Function

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 20

3 2 AnimationThe interactive animation shows the function of the valVario controls VADVAGVAHVAVClick on the picture The animation can be controlled using the control bar at the bottom of the window (as on a DVD player) To play the animation you will need Adobe Reader 7 or a newer version If you do not have Adobe Reader on your system you can download it from the Internet

Go to wwwadobecom click on ldquoAdobe Readerrdquo at the bottom of the page and follow the instructionsIf the animation does not start to play you can download it from the document library (wwwdocuthekcom) as an inde-pendent application

Function

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 21

3 3 Connection diagramWiring to EN 60204-1Connection diagram for VAxS with position indicator ndash see page 19 (Pressure regulator with gas solenoid valve VAxS position indicator with visual indicator)

3 3 1 VAx with M20 cable gland

L1 (+)

N (ndash)

3 3 2 VAx with plug

1 = N (-)

2 = L1 (+)

3 3 3 VAS with VADVAGVAHVAV with M20 cable glandL1V1 (+)

N (-)

L1V2 (+)

3 3 4 VAS with VADVAGVAHVAV with plug2 = L1V1 (+)

1 = N (-)

3 = L1V2 (+)

Function

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 22

4 Replacement possibilities for MODULINE pressure regulators with gas solenoid valve4 1 GVS GVI GVIB GVR and GVRH are to be replaced by VAD VAG VAG+VAS VAH and VAV

Type TypeGVS Pressure regulator with gas solenoid valve Pressure regulator with gas solenoid valve VADGVI Airgas ratio control with gas solenoid valve Airgas ratio control with gas solenoid valve VAG

GVIB Airgas ratio control with gas solenoid valve and bypass valve

Airgas ratio control with gas solenoid valve and bypass valve VAG+VAS

GVRH Flow rate regulator with gas solenoid valve Flow rate regulator with gas solenoid valve VAHGVR Variable airgas ratio control with gas solenoid valve Variable airgas ratio control with solenoid valve VAV115125 Flange 38 Size 115

Size 125 on request

115125 Flange frac12 Size 115

Size 125 Size 1 DN 15 115

115125 Flange frac34 Size 115

Size 125 Size 1 DN 20 120

115125 Flange 1 Size 115

Size 125 Size 1 DN 25 125

232240 Flange 1 Size 232

Size 240 on request

232240 Flange 1frac12 Size 232

Size 240 Size 2 DN 40 240

350 Flange 1frac12 Size 350 on request350 Flange 2 Size 350 Size 3 DN 50 350ML MODULINE + Rp internal thread connection fl anges Rp internal thread RTML MODULINE + NPT internal thread connection fl anges NPT internal thread N01 pu max 100 mbar (15 psig) pu max 500 mbar (7 psig) 02 200 mbar (3 psig) 500 mbar (7 psig)

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 23

Replacement possibilities for MODULINE pressure regulators with gas solenoid valve gt GVS GVI GVIB GVR and GVRH are to be replaced by VAD VAG VAG+VAS VAH and VAV

ContinuationType Type

Quick opening Quick opening NF1 Control ratio 11 Control ratio 11 K Mains voltage 24 V DC Mains voltage 24 V DC K

ndash 100 V AC PQ 120 V AC 120 V AC Q

ndash 200 V AC YT 220240 V AC 230 V AC W3 Electrical connection via terminals Electrical connection via terminals 6 Electrical connection via socket Electrical connection via socket 9 Metal terminal connection box Electrical connection via terminals S Position indicator Position indicator with visual indicator SG Position indicator for 24 V Position indicator for 24 V with visual indicator GM Suitable for biologically produced methane Suitable for biologically produced methane

Pressure test point at the inlet Pressure test point at the inlet and outlet Outlet pressure pd -25

Outlet pressure pd 25 ndash 25 mbar (1 ndash 10 WC)

2 ndash 90 mbar (08 ndash 36 WC) 20 ndash 50 mbar (8 ndash 20 WC) -5035 ndash 100 mbar (14 ndash 40 WC) -100Standard seat A

ExampleGVS 350ML01T3with Rp 2 connection flanges

ExampleVAD 350RNW-100A

with test points

= standard = available Pressure test points may be attached at the left- andor right-hand side Position indicator with visual indicator can be attached at the left- or right-hand side

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 24

∆p [i

nch

WC]

Qn [SCFH]100 400 600 4000 60001000 200020 30 40 50 200 3006015 80

1

08

1

2

3

4

56

8

10

20

30

40

5060

80

100

200

∆p [m

bar]

5

8

3

20

10

30

40

80

60

300

400

50

04 06 1 2 3 4 5 808 10 20 30 402

03 60 100 200

100

200

500

1

3

2

04 06 08 1 2 3 4 5 6 8 10 20 30 40

04 06 08 1 2 3 4 5 6 8 10

200

80 10020 3003

03Qn [m3h]

02

50 60 80 100

40 50 60

VAD

115

B

VAD

120

AVA

D 12

5A

P1P2

VAD

240

AVA

D 35

0A

= natural gas (ρ = 080 kgm3) = propane (ρ = 201 kgm3) = air (ρ = 129 kgm3)

The characteristic flow rate curves have been meas-ured with the specified flanges and a fitted strainer If two or more valves are combined the pressure loss of each additional valve drops by approx 5

metric imperial

Enter densityFlow rate Qn

Inlet pressure pu

Outlet pressure pd

Product RV v

Pressure loss ∆p

∆pmin

5 Flow rate5 1 Selection example for VADNatural gas Flow rate Qmax = 30 m3h Inlet pressure pu = 80 mbar Outlet pressure pd = 60 mbarThe desired control ratio from high-fire to low-fire rate is RV = 101High fire ∆p = pu - pd = 20 mbar Point P1Low fire Point P2 Qmin = 26 m3h at ∆p = 20 mbar RV = Qmax Qmin = 1151

Point P1 and point P2 must be within the working range of a unit size We recommend that you select the smallest size to achieve the best control properties

5 1 1 Calculate VAD

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 25

∆p [i

nch

WC]

Qn [SCFH]100 400 600 4000 60001000 200020 30 40 50 200 3006015 80

1

08

1

2

3

4

56

8

10

20

30

40

5060

80

100

200

∆p [m

bar]

5

8

3

20

10

30

40

80

60

300

400

50

04 06 1 2 3 4 5 808 10 20 30 402

03 60 100 200

100

200

500

1

3

2

04 06 08 1 2 3 4 5 6 8 10 20 30 40

04 06 08 1 2 3 4 5 6 8 10

200

80 10020 3003

03Qn [m3h]

02

50 60 80 100

40 50 60

= pd min lt 5 mbar

VAG

VxH

VAV

115

BVA

GV

xHV

AV 12

0A

VAG

VxH

VAV

125

A

P1

P2

VAG

VxH

VAV

240

AVA

GV

xHV

AV 3

50A

= natural gas (ρ = 080 kgm3) = propane (ρ = 201 kgm3) = air (ρ = 129 kgm3)

The characteristic flow rate curves have been meas-ured with the specified flanges and a fitted strainer If two or more valves are combined the pressure loss of each additional valve drops by approx 5

5 2 Selection example for VAG VAH VRH VAV Natural gas Flow rate Qmax = 30 m3h Inlet pressure pu = 80 mbar Outlet pressure pd max VAG = 60 mbarThe desired control ratio from high-fire to low-fire rate is RV = 101High fire ∆p = pu - pd max = 20 mbar Point P1Low fire pd min = pd max RV2 = 06 mbar Qmin = Qmax RV = 3 m3h ∆p = pu - pd min = 794 mbar Point P2 select VAG 120APoint P1 and point P2 must be within the working range of a unit size We recommend that you select the smallest size to achieve the best control properties

metric imperial

Enter densityFlow rate Qn

Inlet pressure pu

Outlet pressure pd

Product RV v

5 2 1 Calculate VAG VxH VAV

Pressure loss ∆p

∆pmin

Flow rate

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 26

∆p [i

nch

WC]

Qn [SCFH]100 400 600 4000 60001000 200020 30 40 50 200 3006015 80

1

08

1

2

3

4

56

8

10

20

30

40

5060

80

100

200

∆p [m

bar]

5

8

3

20

10

30

40

80

60

300

400

50

04 06 2 3 4 5 808 10 20 30 402

03 60 100 200

100

200

500

1

3

2

04 06 08 1 2 3 4 5 6 8 10 20 30 40

04 06 08 1 2 3 4 5 6 8 10

200

80 10020 3003

03Qn [m3h]

02

50 60 80 100

40 50 60

VAG

115

N

P1VAG

125

N

VAG

120

N

VAG

240

NP2

VAG

350

N

= natural gas (ρ = 080 kgm3) = propane (ρ = 201 kgm3) = air (ρ = 129 kgm3)

The characteristic flow rate curves have been meas-ured with the specified flanges and a fitted strainer If two or more valves are combined the pressure loss of each additional valve drops by approx 5

5 3 Selection example for zero governor VAG NNatural gas Flow rate Qmax = 30 m3h Inlet pressure pu = 20 mbar Outlet pressure pd = 0 mbar (atmospheric pressure)The desired control ratio from high-fire to low-fire rate is RV = 101High fire ∆p = pu - pd max = 20 mbar Point P1Low fire Point P2 Qmin = 24 m3h at ∆p = 20 mbar RV = Qmax Qmin = 1231Point P1 and point P2 must be within the working range of a unit size We recommend that you select the smallest size to achieve the best control properties

metric imperial

Enter densityFlow rate Qn

Inlet pressure pu

Outlet pressure pd

Product RV

5 3 1 Calculate VAG N

Pressure loss ∆p

∆pmin

Flow rate

v

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 27

6 Selection6 1 Selection table for pressure regulator with solenoid valve VAD

Accessories right Accessories left

Type1) T R N F N K P Q Y W S2) G2) R2) L2) M20

cab

le g

land

Plug

with

soc

ket

Plug

with

out s

ocke

t

-25-50 -100 A B Scre

w p

lug

Pres

sure

test

poi

nt

DG

17V

C 3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

Scre

w p

lug

Pres

sure

test

poi

nt

DG

17V

C 3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

VAD 115

VAD 120

VAD 125

VAD 240

VAD 350

= standard = available1) The following nominal inlet fl ange diameters are also available size 1 with nominal diameter DN 10 size 2 with nominal diameters DN 25 DN 32 and DN 50 size 3 with nominal diameters DN 40 and DN 652) Position indicator and bypasspilot gas valve cannot be fi tted together on the same side3) Specify the test point for inlet pressure pu or outlet pressure pdHelp for selecting the pressure regulator VAD can be found on the ProFi DVD wwwkromschroedercom Products DVD Product fi nder ldquoProFirdquo

Order exampleVAD 240RNW-100A

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 28

Selection

6 2 Type code for VADCode DescriptionVAD Pressure regulator with solenoid valve1 ndash 3 SizeT T-product10 ndash 65 Nominal inlet and outlet diameterRNF

Rp internal threadNPT internal thread

ISO fl angeN Quick opening quick closingKPQYW

Mains voltage 24 V DCMains voltage 100 V AC 5060 HzMains voltage 120 V AC 5060 HzMains voltage 200 V AC 5060 HzMains voltage 230 V AC 5060 Hz

SG

Position indicator with visual indicatorPosition indicator for 24 V with visual indicator

RL

Viewed from the right (in the direction of fl ow)Viewed from the left (in the direction of fl ow)

-25-50-100

Outlet pressure pd 25 ndash 25 mbar20 ndash 50 mbar

35 ndash 100 mbarAB

Standard valve seatReduced valve seat

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 29

Selection

6 3 Selection table for airgas ratio control with solenoid valve VAG flow rate regulators VAH VRH

Type1) T R N F N K P Q Y W S2) G2) R2) L2) M20

cab

le g

land

Plug

with

soc

ket

Plug

with

out s

ocke

t

A B E K A N Scre

w p

lug

Pres

sure

test

poi

ntD

G 1

7VC

3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

Scre

w p

lug

Pres

sure

test

poi

ntD

G 1

7VC

3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

VAG 115 VAG 120 VAG 125 VAG 240 VAG 350

VAH 115 VAH 120 VAH 125 VAH 240 VAH 350

VRH 115 VRH 120 VRH 125 VRH 240 VRH 350

= standard = available1) The following nominal inlet fl ange diameters are also available size 1 with nominal diameter DN 10 size 2 with nominal di-

ameters DN 25 DN 32 and DN 50 size 3 with nominal diameters DN 40 and DN 652) Position indicator and bypasspilot gas valve cannot be fi tted together on the same side3) Specify the test point for inlet pressure pu or outlet pressure pdHelp for selecting the regulators can be found on the ProFi DVD wwwkromschroedercom Products DVD Product fi nder ldquoProFirdquo

Order exampleVAG 240RNWAE

Accessories right Accessories left

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 30

Selection

6 4 Type code for VAG VAH VRHCode DescriptionVAGVAHVRH

Airgas ratio control with solenoid valveFlow rate regulator with solenoid valve

Flow rate regulator1 ndash 3 SizeT T-product15 ndash 50 Nominal inlet and outlet diameterRNF

Rp internal threadNPT internal thread

ISO fl angeN1) Quick opening quick closingK1)

P1)

Q1)

Y1)

W1)

Mains voltage 24 V DCMains voltage 100 V AC 5060 HzMains voltage 120 V AC 5060 HzMains voltage 200 V AC 5060 HzMains voltage 230 V AC 5060 Hz

S1)

G1)Position indicator with visual indicator

Position indicator for 24 V with visual indicatorRL

Viewed from the right (in the direction of fl ow)Viewed from the left (in the direction of fl ow)

AB

Standard valve seatReduced valve seat

EKAN

Connection kit for air control pressure psaVAG VAH VRH compression fi tting

VAG plastic hose couplingVAG VAH VRH NPT 18 adapter

VAG zero governor1) Only available for VAG VAV VAH

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 31

6 5 Selection table for variable airgas ratio control with solenoid valve VAVAccessories right Accessories left

Type1) T R N F N K P Q Y W S2) G2) R2) L2) M20

cab

le g

land

Plug

with

soc

ket

Plug

with

out s

ocke

t

A B E K A Scre

w p

lug

Pres

sure

test

poi

ntD

G 1

7VC

3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

Scre

w p

lug

Pres

sure

test

poi

ntD

G 1

7VC

3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

VAV 115

VAV 120

VAV 125

VAV 240

VAV 350

= standard = available1) The following nominal inlet fl ange diameters are also available size 1 with nominal diameter DN 10 size 2 with nominal diameters DN 25 DN 32 and DN 50 size 3 with nominal diameters DN 40 and DN 652) Position indicator and bypasspilot gas valve cannot be fi tted together on the same side3) Specify the test point for inlet pressure pu or outlet pressure pdHelp for selecting the variable airgas ratio control VAV can be found on the ProFi DVD wwwkromschroedercom

Products DVD Product fi nder ldquoProFirdquo

Order exampleVAV 240RNWAK

Selection

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 32

Selection

6 6 Type code for VAVCode DescriptionVAV Variable airgas ratio control with solenoid valve1 ndash 3 SizeT T-product15 ndash 50 Nominal inlet and outlet diameterRNF

Rp internal threadNPT internal thread

ISO fl angeN Quick opening quick closingKPQYW

Mains voltage 24 V DCMains voltage 100 V AC 5060 HzMains voltage 120 V AC 5060 HzMains voltage 200 V AC 5060 HzMains voltage 230 V AC 5060 Hz

SG

Position indicator with visual indicatorPosition indicator for 24 V with visual indicator

RL

Viewed from the right (in the direction of fl ow)Viewed from the left (in the direction of fl ow)

AB

Standard valve seatReduced valve seat

EKA

Connection kit for air control pressure psa and combus-tion chamber control pressure psc

compression fi ttingplastic hose coupling

NPT 18 adapter

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 33

Selection

6 7 AccessoriesModularly configurable withndash Screw plugsndash Pressure test pointsndash Pressure switch DGVC for inlet

andor outlet pressurendash Tightness control TCndash Bypasspilot gas valve VBY 8 for

size 1ndash Bypasspilot gas valve VAS 1For further information see page 37 (Accessories)

Position indicator

Plug with socket

Plug

Screwplugs

Pressuretest points

Pressure switch DGC Tightness

control TC

Bypasspilot gas valve VBY 8 for size 1

Bypasspilot gas valve VAS 1

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 34

7 Project planning informationDo not store or install the unit in the open airThe inlet pressure pu and the outlet pressure pd can be meas-ured on both sides of the valve body To increase the control accuracy an external impulse line can be connected instead of the pressure test point pd

VAD

pu

pd

(psa)

VAGpd

pu

psa

psa

VAD measurement point for the gas outlet pressure pd on the regulator body A combustion chamber control line (psc) can be connected to connection psa for maintaining a constant burner capacityVAG additional measurement point for the air control pressure psa on the regulator body

VAV

psapsc

pu

pd

VAH VRH

pu

pd-

pdpsa-

psa

VAV measurement point for the outlet pressure pd on the regulator bodyVAH additional measurement points for the outlet pressure pd- and the air control pressure psapsa- on the regulator body

7 1 Installation

GFK

VAGVAH

GFKVAD

Sealing material and thread cuttings must not be allowed to get into the valve housing Install a filter upstream of every system

gt20 mmgt0 79

The unit must not be in contact with masonry Minimum clear-ance 20 mm (079 inches)Ensure that there is sufficient space for installation and ad-justment

le +100 degCle +212 degF

The solenoid body heats up during operation ndash depending on ambient temperature (max 60degC140degF) and intrinsic heating (approx 40degC104degF)

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 35

In the case of double solenoid valves the position of the con-nection box can only be changed by removing the actuator and reinstalling it offset by 90deg or 180deg

If more than three valVario controls are installed in line the controls must be supported

The seals in some gas compression fittings are approved for temperatures of up to 70degC (158degF) This temperature limit will not be exceeded if the flow through the pipe is at least 1 msup3h (3531 SCFH) of gas and the maximum ambient temperature is 50degC (122degF)

7 1 1 Installation position

pu ge 80 mbar(80 hPa32 WC)

VAD VAG VAH VRH VAV

In humid environments black solenoid actuator in the vertical upright position only

VAD VAG VAH VRH black solenoid actuator in the vertical upright position or tilted up to the horizontal not upside downVAG VAH horizontal position only if pu ge 80 mbar (32 WC))VAV installation in the vertical position only black solenoid actuator in the vertical upright positionTo ensure that the airgas ratio control VAG the flow rate regulator VAH VRH or the variable airgas ratio control VAV can react quickly when the load is changed the impulse line for the air control pressure psa and for VAV the impulse line for the combustion chamber control pressure psc should be kept as short as possible The tube internal diameter for the impulse line must always be ge 39 mm (015)

VAH VRHIt is not permitted to install a gas solenoid valve VAS down-stream of flow rate regulator VAH VRH and upstream of fine-adjusting valve VMV The VAS would no longer be able to perform its function as a second safety valve if installed in the above-mentioned position

M

VMV

VAH

VASVAS

pd-

psa-psa

VMV

VAH pd-

psa-psa

The measuring orifice in the air line for impulse lines psa and psa- must always be installed downstream of the air control valve

Project planning information gt Installation

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 36

VAVThe impulse line for the combustion chamber control pres-sure psc must be fitted so that no condensation can enter the pressure regulator but rather flows back into the combustion chamber

7 2 Setting the low-fire rate on VAG VAH VRH VAV

-10 +05-05

ndash

+1

-15

mbar

+15

06

1 152

3

N V

+ +ndash

+30 -15+15

ndash

-3

+5

mbar

-5

N

+

VAG VAH VRH VAV

If the burner operates at low-fire rate the gasair mixture can be changed using the parallel shift of the characteristic curve by turning the adjusting screw ldquoNrdquoAdjusting range at low fire VAG VAH VRH -5 to +5 mbar (-195 to +195 WC) VAV -15 to +15 mbar (-06 to +06 WC)

7 3 Setting the high-fire rate on VAVTo set the high-fire rate the transmission ratio is changed us-ing the adjusting screw ldquoVrdquo until the required flue gas values are achievedTransmission ratio V = pdpsa = 061 to 31The settings N and V can influence each other and must be repeated if necessary

+N+V

-V

-N

VAV

psa [mbar]

p d [m

bar]

7 3 1 CalculationWith no connection to the combustion chamber control pres-sure psc pd = V times psa + NWith connection to the combustion chamber control pressure psc (pd - psc) = V times (psa - psc) + N

Project planning information

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 37

pu pd

21579

4836

085310

189

142

8 Accessories8 1 Gas pressure switch DG VC for VAx VRHType Adjusting range [mbar]DG 17VC 2 to 17DG 40VC 5 to 40DG 110VC 30 to 110DG 300VC 100 to 300

Scope of delivery 1 times pressure switch for gas 2 times retaining screws 2 times sealing rings

8 2 Gas pressure switch DG VCT for VAx T VRH TType Adjusting range [WC]DG 17VCT 08 to 68DG 40VCT 2 to 16DG 110VCT 12 to 44DG 300VCT 40 to 120

Scope of delivery 1 times gas pressure switch with AWG 18 connection wires 2 times retaining screws 2 times sealing ringsMonitoring the inlet pressure pu the electrical plug of the pressure switch for gas points towards the inlet flangeMonitoring the outlet pressure pd the electrical plug of the pressure switch for gas points towards the outlet flange

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 38

A BC

D

FE

ACD

F

B

E

8 3 Bypass valvepilot gas valve VAS 18 3 1 VAS 1 attached to VADVAGVAHVAV 1Scope of delivery A 1 times bypasspilot gas valve VAS 1 B 4 times O-rings C 4 times double nuts D 4 times connection parts E 1 times mounting aidBypass valve VAS 1 F 2 times connection pipes if the bypass valve has a blind flange

at the outlet sidePilot gas valve VAS 1 F 1 times connection pipe 1 times sealing plug if the pilot gas valve

has a threaded flange at the outlet side

Accessories

8 3 2 VAS 1 attached to VADVAGVAHVAV 2 VADVAGVAHVAV 3Scope of delivery A 1 times bypasspilot gas valve VAS 1 B 4 times O-rings C 4 times spacer sleeves D 4 times connection parts E 1 times mounting aidBypass valve VAS 1 F 2 times connection pipes if the bypass valve has a blind flange

at the outlet sidePilot gas valve VAS 1 F 1 times connection pipe 1 times sealing plug if the pilot gas valve

has a threaded flange at the outlet side

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 39

2

3

456

810

20

30

405060

80100

∆p [m

bar]

005 01 02 03 05 08 1 2 3 4 51

3

2

Qn [m3h]

1

01

02

03

0405

08

003

002

6 8 10

005 01 02 03 05 08 1 2 3 4 5003 6 8 10

20

005 01 02 03 05 08 1 2 3 4 5003 6 8 10 20

30

∆p [i

nch

WC]

1

2

3

456

810

20

30

40

04

004

006

00801

02

03

0506

08

Qn [SCFH]10 40 60 100 200 3001 500 10002 3 4 5

120 306 8

21 3 4 5 6 7 8 910

8 3 3 Flow rate

The characteristic flow rate curves have been measured for bypass valve VAS 1 with connection pipe diameter 1 to 10 mm (004 to 04) and for the pilot gas valve with 10 mm (04) connection pipe

Bypass valve connection pipe diameter [mm]

Pilo

t gas

val

ve 1

0 m

m (0

4)

conn

ectio

n pi

pe d

iam

eter

Accessories gt Bypass valvepilot gas valve VAS 1

= natural gas (ρ = 080 kgm3) = propane (ρ = 201 kgm3) = air (ρ = 129 kgm3)

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 40

Accessories

8 4 Bypass valvepilot gas valve VBY 8 for VADVAGVAHVAV 1

B

C

AVBY 8

VAx 1

55

(217)40(157)

70 (276)

80(315)

Rp frac14(pilot gas valve)

For mounting on VAD VAG VAH VAV 1 and double solenoid valve VCD VCG VCH VCV 1

8 4 1 Scope of delivery VBY 8I as bypass valveA 1 times bypass valve VBY 8IB 2 times retaining screws with 4 times O-rings both retaining screws

have a bypass orificeC 1 times grease for o-rings

8 4 2 Scope of delivery VBY 8R as pilot gas valveA 1 times pilot gas valve VBY 8RB 2 times retaining screws with 5 x O-rings one retaining screw

has a bypass orifice (2 x O-rings) the other does not (3 x O-rings)

C 1 times grease for O-rings

8 4 3 SelectionType I R W Q K 6L -R -L E B D 05

VBY 8

Order exampleVBY 8RW6L-LED

8 4 4 Type codeCode DescriptionVBY Gas solenoid valve8 Nominal sizeIR

For internal gas pick-up as bypass valveFor external gas pick-up as pilot gas valve

KQW

Mains voltage 24 V DC Mains voltage 120 V AC 5060 HzMains voltage 230 V AC 5060 Hz

6L Electrical connection via plug and socket with LED-R-L

Attachment side of main valve right-hand sideAttachment side of main valve left-hand side

EB

Attached to the VAxEnclosed (separate packing unit)

05D

Nozzle diameter = 05 mm (002)Flow adjustment

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 41

2

01

02

03

05

081

3

456

810

20

30

405060

80100

∆p [m

bar]

1

3

201 02 03 05 1 2 3001 003 4

Qn [m3h]

02 03 05 1 2

01 02 05

002 006

002

002 006 1

0010006 005 01

001

0003

0006 2 3

VBY 8DVBY 805

∆p [i

nch

WC]

1

2

3

456

810

20

30

40

040506

08

1

Qn [SCFH]10 40 60 1005 2081 2 30402

01

02

03

004005006

008

Adjusting range

8 4 5 Flow rateVBY 8 D

+

-

The flow rate can be set by turning the flow rate restrictor (4 mm016 Allen screw) frac14 of a turn Flow rate 10 to 100

VBY 8 05The flow is routed through a 05 mm (002) nozzle and thus has a fixed characteristic flow rate curve Adjustment is not possible

8 4 6 Technical dataInlet pressure pu max 500 mbar (7 psig)Ambient temperature 0 to +60degC (32 to 140degF) no condensation permittedStorage temperature 0 to +40degC (32 to 104degF) no condensation permittedPower consumption 24 V = 8 W 120 V = 8 W 230 V = 95 WEnclosure IP 54

Accessories gt Bypass valvepilot gas valve VBY 8 for VADVAGVAHVAV 1

= natural gas (ρ = 080 kgm3) = propane (ρ = 201 kgm3) = air (ρ = 129 kgm3)

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 42

TC 116VB C

56(22)

49(193)

27(106)

A

A

VCx 1 VCx 2VCx 3

8 5 Tightness control TC 116Vfor VAx 1 ndash 3An adapter plate is required to attach the tightness control to the right- or left-hand side of the pressure regulator with gas solenoid valveScope of delivery A 1 times adapter plate B 2 times O-rings C 2 times retaining screwsFor attachment to left-hand side Order No 74922391 right-hand side Order No 74921995

8 6 Pressure test pointsTest points to check the inlet pressure pu and outlet pressure pdScope of delivery 1 x pressure test points with 1 x profiled sealing rings Order No 74923390

8 7 Cable gland setWhen wiring a double solenoid valve with pressure regula-tor VCx the connection boxes are to be connected using a cable gland setThe cable gland set can only be used if the connection boxes are at the same height and on the same side and if both valves are equipped either with or without a proof of closure switchVA 1 Order No 74921985 VA 2 Order No 74921986 VA 3 Order No 74921987

Accessories

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 43

A B

D

C

Accessories

8 9 Differential pressure orifice

Size PipeDN

Differential pressure orifi cewith outlet dia

1 15 17 mm 0671 20 25 mm 0981 25 30 mm 1182 40 46 mm 1813 50 58 mm 228

If pressure regulator VADVAGVAV 1 is retrofitted upstream of gas solenoid valve VAS 1 a DN 25 differential pressure orifice with outlet opening d = 30 mm (118) must be inserted at the outlet of the pressure regulatorIn the case of pressure regulator VAx 115 or VAx 120 the DN 25 differential pressure orifice must be ordered separately and retrofitted Order No 74922240

8 8 Seal set VA 1 ndash 3VA 1 Order No 74921988 VA 2 Order No 74921989 VA 3 Order No 74921990Scope of deliveryA 1 times double block seal B 2 times O-rings (flange) C 2 times O-rings (pressure switch) for pressure test pointscrew plug D 2 times sealing rings (flat sealing) and 2 times profiled sealing rings

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 44

BA

C

pd-

8 11 Attachment blockFor locked installation of pressure gauge and other acces-soriesScope of delivery A 1 times attachment block B 2 times self-tapping screws for installation C 2 times O-rings

Accessories

8 10 Retaining frameIn the event that a pressure regulator VAx is installed at a later point upstream of a gas solenoid valve VAS a measur-ing orifice VMO or a fine-adjusting valve VMV the retaining frame must be fitted at the inlet of the second device in order to fasten the differential pressure orifice at the regulator outlet Order the retaining frame separatelyRetaining frame for Size 1 Order No 74923029 Size 2 Order No 74923030 Size 3 Order No 74923031

8 12 Gas control lineFine-adjusting valve VMV can be installed on the flow rate regulator VAH for fine adjustment of the gas flow rateThe gas control line for gas outlet pressure pd- is available with 2 18 compression fittingsSize 1 Order No 74924458 Size 2 Order No 74924459

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 45

8 13 Measuring orifice VMOThe measuring orifice VMO is designed to reduce the gas and air flow rates and is installed downstream of the valVario control The measuring orifice is available with Rp internal thread (NPT internal thread) or flange to ISO 7005See wwwdocuthekcom Elster Kromschroumlder Krom-schroumlder LBE Products 03 Valves and butterfly valves valVario accessories Type of document Technical Informa-tion VMO

Accessories

8 14 Filter module VMFUsing the filter module VMF the gas flow upstream of the gas solenoid valve VAS and the airgas ratio control is cleaned The filter module is available with Rp internal thread (NPT internal thread) or flange to ISO 7005 and can also be supplied with fitted pressure switch as an optionSee wwwdocuthekcom Elster Kromschroumlder Krom-schroumlder LBE Products 03 Valves and butterfly valves valVario accessories Type of document Technical Informa-tion VMF

8 15 Fine-adjusting valve VMVThe flow rate is set using the fine-adjusting valve VMV The fine-adjusting valve is available with Rp internal thread (NPT internal thread) or flange to ISO 7005See wwwdocuthekcom Elster Kromschroumlder Krom-schroumlder LBE Products 03 Valves and butterfly valves valVario accessories Type of document Technical Infor-mation VMV

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 46

9 Technical dataGas types natural gas LPG (gaseous) biologically produced methane (max 01 -by-vol H2S) or clean air other gases on request The gas must be clean and dry in all temperature conditions and must not contain condensateCE and FM approved UL listed max inlet pressure pu 10 ndash 500 mbar (4 ndash 200 WC) FM approved (230 V AC 120 V AC 24 V DC) non opera-tional pressure 700 mbar (10 psig)ANSICSA approved (230 V AC 120 V AC 24 V DC) up to 350 mbar (5 psig)Opening time of the solenoid valve quick opening le 05 s Closing time quick closing lt 1 sMedium and ambient temperatures -20 to +60degC (-4 to +140degF) no condensation permittedStorage temperature -20 to +40degC (-4 to +104degF)Enclosure IP 65Valve housing aluminium valve seal NBRConnection flanges with internal thread Rp to ISO 7-1 NPT to ANSIASMESafety valve Class A to EN 161 Factory Mutual Research Class 7400 Process Control Valves (230 V AC 120 V AC 24 V DC) ANSI Z2121 and CSA 65 ANSI Z2118 and CSA 63Control class A to EN 88-1Control range up to 101

Mains voltage 230 V AC +10-15 5060 Hz 200 V AC +10-15 5060 Hz 120 V AC +10-15 5060 Hz 100 V AC +10-15 5060 Hz 24 V DC plusmn20Duty cycle 100Power factor of the solenoid coil cos φ = 09Power consumption

Type Voltage Power

VAx 1

24 V DC 25 W ndash100 V AC 25 W (26 VA)120 V AC 25 W (26 VA)200 V AC 25 W (26 VA)230 V AC 25 W (26 VA)

VAx 2 VAx 3

24 V DC 36 W ndash100 V AC 36 W (40 VA)120 V AC 40 W (44 VA)200 V AC 40 W (44 VA)230 V AC 40 W (44 VA)

VBY24 V DC 8 W ndash

120 V AC 8 W ndash230 V AC 95 W ndash

Cable gland M20 times 15Electrical connection cable with max 25 mm2 (AWG 12) or plug with socket to EN 175301-803

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 47

Position indicator contact rating

Type Voltage Min current(resistive load)

Max current(resistive load)

VAxS VCxS 12 ndash 250 V AC 5060 Hz 100 mA 3 AVAxG VCxG 12 ndash 30 V DC 2 mA 01 A

Position indicator switching frequency max 5 times per minute

Switching current [A]

Switching cyclescos φ = 1 cos φ = 06

01 500000 50000005 300000 250000

1 200000 1000003 100000 ndash

Limited to max 200000 cycles for heating systems

9 1 VADOutlet pressure pd VAD-25 25 ndash 25 mbar (1 ndash 10 WC) VAD-50 20 ndash 50 mbar (8 ndash 20 WC) VAD-100 35 ndash 100 mbar (14 ndash 40 WC)Combustion chamber control pressure psc (connection psa)

-20 to +20 mbar (-78 to +78 WC)

VAD

pu

pd

(psa)

9 2 VAGOutlet pressure pd 05 ndash 100 mbar (02 ndash 40 WC)Air control pressure psa 05 ndash 100 mbar (02 ndash 40 WC)

Adjusting range at low fire plusmn5 mbar (plusmn2 WC)Transmission ratio of gas to air 11The inlet pressure must always be higher than the air control pressure psa + pressure loss ∆p + 5 mbar (2 WC)

VAGpd

pu

psa

psa

VAGK 1 x 18 coupling for plastic hose (internal dia 39 mm (015) external dia 61 mm (024)) or VAGE 1 x 18 compression fitting for 6 times 1 tube or VAGA 1 x NPT 18 adapter or VAGN zero governor with breathing orifice

9 3 VAH VRHAir control pressure psa 06 ndash 100 mbar (024 ndash 40 WC) Differential air pressure ∆psa (psa - psa-) 06 ndash 50 mbar (024 ndash 197 WC) Differential gas pressure ∆pd (pd - pd-) 06 ndash 50 mbar (024 ndash 197 WC)Transmission ratio of gas to air 11The inlet pressure must always be higher than the differen-tial air pressure ∆psa + pressure loss ∆p + max gas pres-sure on burner + 5 mbar (2 WC)Adjusting range at low fire plusmn5 mbar (plusmn2 WC)

Technical data

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 48

VAHVRH

pd-

pu

psa-

psa

Connection of the air control pressure psaVAHE VRHE 3 x 18 compression fitting for 6 times 1 tube or VAHA VRHA 3 x NPT 18 adapter

9 4 VAVOutlet pressure pd 05 ndash 30 mbar (02 ndash 117 WC)Air control pressure psa 04 ndash 30 mbar (015 ndash 117 WC)Combustion chamber control pressure psc

-20 to +20 mbar (-78 to +78 WC)Min control pressure differential psa - psc 04 mbar (015 WC)Min pressure differential pd - psc 05 mbar (02 WC)Adjusting range at low fire plusmn15 mbar (plusmn06 WC)Transmission ratio of gas to air 061 to 31The inlet pressure pu must always be higher than the air control pressure psa times transmission ratio V + pressure loss ∆p + 15 mbar (06 WC)

pu

pd psapsc

VAV

VAVK 2 x plastic hose couplings (internal dia 39 mm (015) external dia 61 mm (024)) or VAVE 2 x 18 compression fitting for 6 times 1 tube or VAVA 2 x NPT 18 adapter

Technical data

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 49

9 5 Safety-specific characteristic values for VAx 1 ndash 3For SILSuitable for Safety Integrity Level SIL 1 2 3

Diagnostic coverage DC 0

Type of subsystem Type A to EN 61508-2 74312

Operating mode High demand mode pursu-ant to EN 61508-4 3512

For PLSuitable for Performance Level PL a b c d e

Category B 1 2 3 4Common cause failure CCF gt 65Application of essential safety requirements Satisfied

Application of tried-and-tested safety requirements Satisfied

For SIL and PL

B10d value

Operating cyclesVAD VAG VAV VAH 1 10094360VAD VAG VAV VAH 2 8229021VAD VAG VAV VAH 3 6363683

Hardware fault tolerance (1 valve) HFT 0

Hardware fault tolerance (2 valves) HFT 1

Safe failure fraction SFF gt 90Fraction of undetected com-mon cause failures β ge 2

Max service life under operating conditions10 years after date of production plus max 12 year in stor-age prior to first use or once the given number of operating cycles has been reached depending on which is achieved firstThe devices are suitable for single-channel systems (HFT = 0) up to SIL 2PL d and up to SIL 3PL e when two re-dundant valves are installed in a double-channel architecture (HFT = 1) provided that the complete system complies with the requirements of EN 61508ISO 13849

For a glossary of terms see page 53 (Glossary)

Technical data

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 50

nop 1hnop 1a

sB10d

T10d aPFHD (1 VAx) 1h

PFHD (2 VAx) 1h

PFDavg (1 VAx)

PFDavg (2 VAx)

Technical data gt Safety-specific characteristic values for VAx 1 ndash 3

9 5 1 Determining the PFHD value the λD value and the MTTFd value

PFHD = λD = x nop= 1MTTFd

01B10d

PFDavg = x λD x 24 x 365 x T10d 12

Type

Cycle time

suitable for

suitable for

PFHD = Probability of dangerous failure (HDM = high de-mand mode) [1hour]PFDavg = Average probability of dangerous failure on de-mand (LDM = low demand mode)λD = Mean dangerous failure rate [1hour]MTTFd = Mean time to dangerous failure [hours]nop = Demand rate (mean number of annual operations) [1hour]

9 5 2 Calculating the PFHD and PFDavg

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 51

VAD VAG VAH VAV

H1

Rp frac14(NPT frac14)

H2

E

LF

F

H4

H3

B

VAxS VAxF

L2G

G

Technical data

9 6 Dimensions

Type

Connec-tion Dimensions

WeightRpNPT DN

L L2 E F G H1 H2 H3 H4 Bmm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch kg lbs

VAx 115 12 15 75 29 ndash ndash 75 29 15 06 ndash ndash 143 56 82 32 161 63 117 46 97 38 18 40VAH 115 12 15 75 29 ndash ndash 75 29 15 06 ndash ndash 143 56 100 39 161 63 135 53 97 38 2 44VAx 120 34 20 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 82 33 161 63 117 46 97 38 19 42VAH 120 34 20 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 100 39 161 63 135 53 97 38 21 46VAx 125 1 25 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 82 33 161 63 117 46 97 38 19 42VAH 125 1 25 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 100 39 161 63 135 53 97 38 21 46VAx 240 112 40 128 50 200 79 85 33 29 11 66 26 170 67 112 44 191 75 162 64 125 49 44 97VAH 240 112 40 128 50 200 79 85 33 29 11 66 26 170 67 132 52 191 75 182 72 125 49 47 104VAx 350 2 50 155 61 230 91 85 33 36 14 74 29 180 70 135 53 201 79 196 77 160 63 61 134VAH 350 2 50 155 61 230 91 85 33 36 14 74 29 180 70 156 61 201 79 217 85 160 63 64 141

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 52

10 Converting unitssee wwwadlatusorg

11 Maintenance cyclesAt least once per annum at least twice per annum for biologi-cally produced methaneIf the flow rate drops clean the strainer

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 53

12 Glossary12 1 Diagnostic coverage DCMeasure of the effectiveness of diagnostics which may be determined as the ratio between the failure rate of detected dangerous failures and the failure rate of total dangerous failuresNOTE Diagnostic coverage can exist for the whole or parts of a safety-related system For example diagnostic cover-age could exist for sensors andor logic system andor final elements Unit see EN ISO 13849-12008

12 2 Mode of operationHigh demand mode or continuous modeOperating mode where the frequency of demands for opera-tion made on a safety-related system is greater than one per year or greater than twice the proof-test frequencysee EN 61508-42008

12 3 CategoryClassification of the safety-related parts of a control system in respect of their resistance to faults and their subsequent behaviour in the fault condition and which is achieved by the structural arrangement of the parts fault detection andor by their reliability see EN ISO 13849-12008

12 4 Common cause failure CCFFailures of different items resulting from a single event where these failures are not consequences of each othersee EN ISO 13849-12008

12 5 Fraction of undetected common cause failures β Fraction of undetected failures of redundant components due to a single event whereby these failures are not based on mutual causesNOTE β is expressed as a fraction in the equations and as a percentage elsewheresee EN 61508-62010

12 6 B10d valueMean number of cycles until 10 of the components fail dan-gerouslysee EN ISO 13849-12008

12 7 T10d valueMean time until 10 of the components fail dangerouslysee EN ISO 13849-12008

12 8 Hardware fault tolerance HFTA hardware fault tolerance of N means that N + 1 is the mini-mum number of faults that could cause a loss of the safety functionsee IEC 61508-22010

12 9 Mean dangerous failure rate λD Mean rate of dangerous failures during operation time (T10d) Unit 1hsee EN ISO 13849-12008

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 54

12 10 Safe failure fraction SFFFraction of safe failures related to all failures which are as-sumed to appearsee EN 13611A22011

12 11 Probability of dangerous failure PFHD Value describing the likelihood of dangerous failure per hour of a component for high demand mode or continuous mode Unit 1hsee EN 13611A22011

12 12 Mean time to dangerous failure MTTFd Expectation of the mean time to dangerous failuresee EN ISO 13849-12008

12 13 Demand rate nop Mean number of annual operationssee EN ISO 13849-12008

12 14 Average probability of dangerous failure on demand PFDavg (LDM = 1 ndash 10 switching cyclesyear)Average probability of a dangerous failure of the safety function on demand (LDM = low demand mode)see EN 61508-6

Glossary

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415

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Remarks

(Adobe Reader 7 or higher required) wwwadobecom

Elster GmbH Postfach 2809 middot 49018 Osnabruumlck Strotheweg 1 middot 49504 Lotte (Buumlren) GermanyT +49 541 1214-0 F +49 541 1214-370 infokromschroedercomwwwkromschroedercom

The current addresses of our international agents are available on the Internetwwwkromschroederdeindexphpid=718ampL=1

We reserve the right to make technical modifications in the interests of progressCopyright copy 2015 Elster GmbH All rights reserved

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0530

  • Pressure regulators with solenoid valve VAD VAG VAV VAH
  • Flow rate regulator VRH
  • Pressure regulators with double solenoid valve VCD VCG VCV VCH
  • Contents
  • 1 Application
    • 11 Examples of application
      • 111 Constant pressure control
      • 112 Constant pressure control with two gas solenoid valves
      • 113 Constant pressure control with max pressure switch
      • 114 Constant pressure control with non-controlled pilot gas outlet
      • 115 Modulating control
      • 116 Modulating control with two gas solenoid valves
      • 117 Modulating control with two gas solenoid valves and inlet pressure switch
      • 118 HighLow control
      • 119 Zero pressure control
      • 1110 Staged flow rate control
      • 1111 Continuous or staged flow rate control
      • 1112 Modulating control with variable airgas ratio control with gas solenoid valve
      • 1113 Modulating control in residential heat generation
          • 2 Certification
          • 3 Function
            • 31 VAD VAG VAH VRH VAV
              • 311 Pressure regulator for gas VAD
              • 312 Airgas ratio control VAG
              • 313 Flow rate regulators VAH VRH
              • 314 Variable airgas ratio control VAV
              • 315 Pressure regulator with gas solenoid valve VAxS position indicator with visual indicator
                • 32 Animation
                • 33 Connection diagram
                  • 331 VAx with M20 cable gland
                  • 332 VAx with plug
                  • 333 VAS with VADVAGVAHVAV with M20 cable gland
                  • 334 VAS with VADVAGVAHVAV with plug
                      • 4 Replacement possibilities for MODULINE pressure regulators with gas solenoid valve
                        • 41 GVS GVI GVIB GVR and GVRH are to be replaced by VAD VAG VAG+VAS VAH and VAV
                          • 5 Flow rate
                            • 51 Selection example for VAD
                              • 511 Calculate VAD
                                • 52 Selection example for VAG VAH VRH VAV
                                  • 521 CalculateVAG VxHVAV
                                    • 53 Selection example for zero governor VAGN
                                      • 531 Calculate VAGN
                                          • 6 Selection
                                            • 61 Selection table for pressure regulator with solenoid valve VAD
                                            • 62 Type code for VAD
                                            • 63 Selection table for airgas ratio control with solenoid valve VAG flow rate regulators VAH VRH
                                            • 64 Type code for VAG VAH VRH
                                            • 65 Selection table for variable airgas ratio control with solenoid valve VAV
                                            • 66 Type code for VAV
                                            • 67 Accessories
                                              • 7 Project planning information
                                                • 71 Installation
                                                  • 711 Installation position
                                                    • 72 Setting the low-fire rate on VAG VAH VRH VAV
                                                    • 73 Setting the high-fire rate on VAV
                                                      • 731 Calculation
                                                          • 8 Accessories
                                                            • 81 Gas pressure switch DGVC for VAx VRH
                                                            • 82 Gas pressure switch DGVCT for VAxT VRHT
                                                            • 83 Bypass valvepilot gas valve VAS 1
                                                              • 831 VAS 1 attached to VADVAGVAHVAV 1
                                                              • 832 VAS 1 attached to VADVAGVAHVAV 2 VADVAGVAHVAV 3
                                                              • 833 Flow rate
                                                                • 84 Bypass valvepilot gas valve VBY 8 for VADVAGVAHVAV 1
                                                                  • 841 Scope of delivery VBY 8I as bypass valve
                                                                  • 842 Scope of delivery VBY 8R as pilot gas valve
                                                                  • 843 Selection
                                                                  • 844 Type code
                                                                  • 845 Flow rate
                                                                  • 846 Technical data
                                                                    • 85 Tightness control TC 116V
                                                                    • 86 Pressure test points
                                                                    • 87 Cable gland set
                                                                    • 88 Seal set VA 1thinspndashthinsp3
                                                                    • 89 Differential pressure orifice
                                                                    • 810 Retaining frame
                                                                    • 811 Attachment block
                                                                    • 812 Gas control line
                                                                    • 813 Measuring orifice VMO
                                                                    • 814 Filter module VMF
                                                                    • 815 Fine-adjusting valve VMV
                                                                      • 9 Technical data
                                                                        • 91 VAD
                                                                        • 92 VAG
                                                                        • 93 VAH VRH
                                                                        • 94 VAV
                                                                        • 95 Safety-specific characteristic values for VAx 1thinspndashthinsp3
                                                                          • 951 Determining the PFHD value the λD value and the MTTFd value
                                                                          • 952 Calculating the PFHD and PFDavg
                                                                            • 96 Dimensions
                                                                              • 10 Converting units
                                                                              • 11 Maintenance cycles
                                                                              • 12 Glossary
                                                                                • 121 Diagnostic coverage DC
                                                                                • 122 Mode of operation
                                                                                • 123 Category
                                                                                • 124 Common cause failure CCF
                                                                                • 125 Fraction of undetected common cause failures β
                                                                                • 126 B10d value
                                                                                • 127 T10d value
                                                                                • 128 Hardware fault tolerance HFT
                                                                                • 129 Mean dangerous failure rate λD
                                                                                • 1210 Safe failure fraction SFF
                                                                                • 1211 Probability of dangerous failure PFHD
                                                                                • 1212 Mean time to dangerous failure MTTFd
                                                                                • 1213 Demand rate nop
                                                                                • 1214 Average probability of dangerous failure on demand PFDavg
                                                                                  • Feedback
                                                                                  • Contact
                                                                                      1. naechste_Seite 24
                                                                                      2. naechste Seite 18
                                                                                      3. naechste Seite 6
                                                                                      4. naechste Seite 16
                                                                                      5. naechste Seite 14
                                                                                      6. naechste Seite 25
                                                                                      7. naechste_Seite 11
                                                                                      8. naechste_Seite 17
                                                                                      9. fbArbeitspunkt_Min Ja
                                                                                      10. fbArbeitspunkt Ja
                                                                                      11. ftProgramm Standard-Programm
                                                                                      12. fz_kv
                                                                                      13. fz_pe 80
                                                                                      14. fz_pG 60
                                                                                      15. fzDelta_p_Soll 20
                                                                                      16. ftEinheit_Druck mbar
                                                                                      17. fatTyp [115]
                                                                                      18. fbArbeitspunkt_Min_2 Ja
                                                                                      19. fbArbeitspunkt_2 Ja
                                                                                      20. ftRegler_Typ VAG
                                                                                      21. ftProgramm_2 Standard-Programm
                                                                                      22. fz_kv_2
                                                                                      23. fatMedium [08]
                                                                                      24. fzDichte 08
                                                                                      25. ftEinheit_Dichte kgm3
                                                                                      26. fzV_Norm 30
                                                                                      27. ftEinheit_Volstrom m3h
                                                                                      28. fz_pe_2 80
                                                                                      29. fz_pG_2 60
                                                                                      30. fzDelta_p_Soll_2 20
                                                                                      31. ftEinheit_Druck2 [mbar]
                                                                                      32. ftEinheit_Geschw [ms]
                                                                                      33. fatTyp_2 [10954451150103322]
                                                                                      34. fbArbeitspunkt_Min_3 Ja
                                                                                      35. fbArbeitspunkt_3 Ja
                                                                                      36. ftProgramm_3 Standard-Programm
                                                                                      37. fz_kv_3
                                                                                      38. fz_pe_3 20
                                                                                      39. fz_pG_3 0
                                                                                      40. fzDelta_p_Soll_3 20
                                                                                      41. fatTyp_3 [123]
                                                                                      42. fatSchaltleistung [6363683]
                                                                                      43. fz_nop_Stunde 1
                                                                                      44. fz_nop_Jahr 8760
                                                                                      45. fzZyklus 3600
                                                                                      46. fzB10d 6363683
                                                                                      47. fzT10d 10
                                                                                      48. fzPFHd_1V 15714170551864384e-8
                                                                                      49. fzPFDavg_1V
                                                                                      50. ftGeeignet_1V PL d SIL 2
                                                                                      51. fzPFHd_2V 33505832253532625e-10
                                                                                      52. fzPFDavg_2V
                                                                                      53. ftGeeignet_2V PL e SIL 3
                                                                                      54. ftUebersicht Off
                                                                                      55. ftVerstaendlichkeit Off
                                                                                      56. ftFehlende_Info
                                                                                      57. ftUmfang Off
                                                                                      58. ftVerwendung_1 Off
                                                                                      59. ftVerwendung_2 Off
                                                                                      60. ftVerwendung_3 Off
                                                                                      61. ftVerwendung_4 Off
                                                                                      62. ftNavigation Off
                                                                                      63. ftTaetigkeitsbereich Off
                                                                                      64. ftBemerkung
                                                                                      65. Michael Rehkamp Elster Kromschroumlder>btnSenden
Page 8: VAD, VAG, VAV, VAH, VRH, VCD, VCG, VCV, VCH · PDF fileVAD, VAG, VAH, VAV, VRH, VCD, VCG, VCV, VCH · Edition 04.15 6 VAD VAD VAS 1 .1 Examples of application 1 .1 .1 Constant pressure

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 8

psa

psa

VAG

MIC + BVA

psa

psaM

IC + BVA

VASVAG

1 1 5 Modulating controlThe gas outlet pressure pd is con trolled via the airgas ratio control with gas so-lenoid valve VAG The gas outlet pres-sure pd follows the changing air control pressure psa The ratio of gas pressure to air pressure remains constant The VAG is suitable for a control range up to 101If a second solenoid valve is used up-stream of the VAG this complies with the requirements of EN 746-2 for two Class A valves connected in series

1 1 6 Modulating control with two gas solenoid valvesThe gas outlet pressure pd is con trolled via the airgas ratio control with gas so-lenoid valve VAG The gas outlet pres-sure pd follows the changing air control pressure psa The ratio of gas pressure to air pressure remains constant The VAG is suitable for a control range up to 101The gas line is two Class A shut-off valves connected in series in accordance with the requirements of EN 746-2

Application gt Examples of application

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 9

DGCmin

PZL

psa

psa

M

IC + BVA

VAS

VAG

psa

DGCmin

PZL

psa

M

IC 40 + BVA

VAS

VAG

VAS 1

1 1 7 Modulating control with two gas solenoid valves and inlet pressure switchIn this case the minimum inlet pressure pu is monitored by the pressure switch DGC The simple attachment of the pressure switch module makes instal-lation easier

1 1 8 HighLow controlAt high fire the gas outlet pressure pd follows the air control pressure psa The ratio of gas pressure to air pressure re-mains constant Low fire is determined via the bypass valve VAS 1 Here as well the simple attachment of the bypass valve module makes installation easier

Application gt Examples of application

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 10

Venturi

DGCmin

PZL

M

IC + BVA

VASVAGN

1 1 9 Zero pressure controlIn this application the control air pres-sure is the atmospheric air pressure The air flow rate generates a negative pressure in the gas pipe via the Venturi This negative pressure is compensated by the airgas ratio control with gas solenoid valve VAGN The greater the negative pressure the greater the gas flow rate

Application gt Examples of application

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 11

BVHM + MB7L

VMV

ECOMAX

VASN

BCU BZA

Prozess SteuerungProcess Control (PCC)

AKT

psa-

psa

pd-

VAH

1 1 10 Staged flow rate controlThis application shows the VAH on a self recuperative burnerThe pressure loss in the recuperator de-pends on the furnace or kiln temperature When the furnace or kiln temperature is increased (at a constant air supply pres-sure) the flow rate drops This change in the air flow rate is measured by the orifice and the VAH changes the gas volume accordinglyThe air index (lambda) can be set using the fine-adjusting valve VMV

Application gt Examples of application

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 12

M

IC + BVA

VMV

VMO

VAH

VAS

psa-psa

pd-

psa

psc

DGCmin

PZL

psa

psc

M

IC + BVA

VAS VAV

1 1 11 Continuous or staged flow rate controlThis application shows flow rate control for a radiant tube burner system with plug-in recuperator for air preheatingThere are temperature-dependent air pressure losses in the recuperator The ratio of gas pressure to air pressure does not remain constant The fluctuating air flow rate is measured at the measuring orifice VMO and the VAH controls the gas flow rate proportionallyThe air index (lambda) can be set using the fine-adjusting valve VMV

Application gt Examples of application

1 1 12 Modulating control with variable airgas ratio control with gas solenoid valveThe ratio of gas pressure to air pressure can be adjusted infinitely between 061 and 31 Pressure fluctuations in the com-bustion chamber can be compensated via the combustion chamber control pressure psc see page 15 (Function)

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 13

DGCmin

PZL

psa

psc

VAS VAV

1 1 13 Modulating control in residential heat generationThis application shows the variable airgas ratio control with solenoid valve VAV fitted to a modulating-controlled forced draught burnerThe combustion air volume is set via a butterfly valve for air or by adjusting the fan speed

Application gt Examples of application

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 14

2 CertificationCertificates ndash see Docuthek

VAD VAG VAV VAH certified to SIL and PL

For systems up to SIL 3 pursuant to EN 61508 and PL e pursu-ant to ISO 13849

VAD VAG VAV VAHEU certified pursuant to

ndash Gas Appliances Directive (2009142EC) in conjunction with EN 13611 EN 161 EN 88-1 EN 126 and EN 1854

Meets the requirements of thendash Low Voltage Directive (200695EC)ndash EMC Directive (2004108EC)

VAD VAG VAV VAH FM approved

Factory Mutual Research Class 7400 Process Control Valves Designed for applications pursuant to NFPA 85 and NFPA 86 www approvalguide com

VAD VAG ANSICSA approved

American National Standards InstituteCanadian Standards Association ndash ANSI Z21 21CSA 6 5 ANSI Z21 18 and CSA 6 3

wwwcsagrouporg ndash Class number 3371-83 (natural gas LPG) 3371-03 (natural gas propane)

VAD VAG VAV UL listed

Underwriters Laboratories ndash UL 429 ldquoElectrically operated valvesrdquo wwwulcom Tools (at the bottom of the page) Online Certifications Directory

VAD VAG VAV AGA approved

AGA

Australian Gas Association Approval No 5319 httpwww aga asn auproduct_directory

Eurasian Customs Union

The product VAD VAG VAV VAH VCD VCG VCV VCH meets the technical specifications of the Eurasian Customs Union (the Russian Federation Belarus Kazakhstan)

Approval does not apply for 100 V AC and 200 V AC

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 15

3 Function3 1 VAD VAG VAH VRH VAVThe regulator is closed when it is disconnected from the power supplyOpening connect the system to the electrical power supply (alternating voltage will be rectified) The blue LED lights up The coilrsquos magnetic field pulls the armature upwards and clears the supply nozzle for the gas inlet pressure pu The gas passes through the internal impulse tube to the adjustment diaphragm and then pushes the valve disc open The outlet pressure is applied to the servo diaphragm via the internal feedback

The servo regulator then maintains a set constant outlet pres-sure pd

3 1 1 Pressure regulator for gas VADThe nominal outlet pressure pd is defined by the control spring

Servoregulator

Valve

Armature

Valve disc

Adjustmentdiaphragm

Servodiaphragm

Internalfeedback

Controlspring

Solenoid coil

Supplynozzle

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 16

3 1 2 Airgas ratio control VAGThe airgas ratio control VAG controls the outlet pressure pd depending on the variable air control pressure psaThe ratio of gas pressure to air pressure remains constant 11 The VAG is suitable for a control range up to 101If the burner operates at low-fire rate the gasair mixture can be changed by adjusting the zero point spring ldquoNrdquo

Function

psa

pd

Zero point setting N zero point spring

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 17

Function

3 1 3 Flow rate regulators VAH VRHThe flow rate regulators VAH VRH control the gas flow rate depending on the variable air flow rate The ratio of gas flow rate to air flow rate remains constant If the burner operates at low-fire rate the gasair mixture can be changed by adjusting the zero point spring ldquoNrdquoIn addition flow rate regulator VAH is designed as a gas solenoid valve and shuts off the gas or air supply safely

psa

psa-

pd-

pdInternal feedback

Zero point setting N zero point spring

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 18

3 1 4 Variable airgas ratio control VAVThe servo regulator maintains a set constant outlet pressure pd The variable airgas ratio control VAV controls the outlet pressure pd depending on the variable air control pressure psa The ratio of gas pressure to air pressure remains constantThe settings N and V can be changed and read off from both sides of the unit using the adjusting screwsThe ratio of gas pressure to air pressure at low-fire rate can be changed by adjusting the zero point setting N By turning the adjusting screw ldquoNrdquo the force of the zero point spring and thus the zero point is changed by plusmn 15 mbar (06 WC) see page 34 (Project planning information)The high-fire rate is set by turning the adjusting screw ldquoVrdquo until the required flue gas values are achieved see page 34 (Project planning information) The ratio of gas pressure to air pressure can be set from 061 to 31The settings N and V influence each other and the adjustment process must be repeated if necessaryThe outlet pressure pd is applied to the servo diaphragm via the internal feedback The combustion chamber control pres-sure psc is transmitted to the space under the air and servo diaphragms via an impulse lineThe pressure differential psa - psc is achieved on the air diaphragm and the pressure differential pd - psc on the servo diaphragm This ensures that pressure fluctuations in the combustion cham-ber can be compensated The flue gas values remain constant in the case of fluctuations in the combustion chamber pressure (pd - psc) = (psa - psc) times V + N

Function

pdpsc

psa

Air diaphragm

Transmission ratio V

Zero point setting N zero point spring

Internalfeedback

Adjustment diaphragm

Servo diaphragm

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 19

1 COM

2 NO

3 NC

3 1 5 Pressure regulator with gas solenoid valve VAx S position indicator with visual indicatorOpening when the pressure regulator is opened the posi-tion indicator switches The visual indicator is activated The ldquoopenrdquo signal is marked in red The double valve seat opens to release the volume of gasClosing the pressure regulator VAx is disconnected from the voltage supply and the closing spring presses the double valve disc on to the valve seat The position indicator is actuated The visual indicator is white for ldquoclosedrdquoThe actuator cannot be rotated on a pressure regulator with a position indicator and a visual indicatorNOTE NFPA 86 ndash the following must be taken into account as soon as the capacity of the pilot or main burner exceeds 117 kW (400000 BTUh) safety shut-off valve VASS must be fitted with a proof of closure overtravel switch with a visual position indicator and the burner-side pressure regulator with gas solenoid valve VAxS must also be fitted with a position indicator with visual indicator The closed position can be verified using the proof of closure switch of the gas solenoid valve VASS

Function

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 20

3 2 AnimationThe interactive animation shows the function of the valVario controls VADVAGVAHVAVClick on the picture The animation can be controlled using the control bar at the bottom of the window (as on a DVD player) To play the animation you will need Adobe Reader 7 or a newer version If you do not have Adobe Reader on your system you can download it from the Internet

Go to wwwadobecom click on ldquoAdobe Readerrdquo at the bottom of the page and follow the instructionsIf the animation does not start to play you can download it from the document library (wwwdocuthekcom) as an inde-pendent application

Function

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 21

3 3 Connection diagramWiring to EN 60204-1Connection diagram for VAxS with position indicator ndash see page 19 (Pressure regulator with gas solenoid valve VAxS position indicator with visual indicator)

3 3 1 VAx with M20 cable gland

L1 (+)

N (ndash)

3 3 2 VAx with plug

1 = N (-)

2 = L1 (+)

3 3 3 VAS with VADVAGVAHVAV with M20 cable glandL1V1 (+)

N (-)

L1V2 (+)

3 3 4 VAS with VADVAGVAHVAV with plug2 = L1V1 (+)

1 = N (-)

3 = L1V2 (+)

Function

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 22

4 Replacement possibilities for MODULINE pressure regulators with gas solenoid valve4 1 GVS GVI GVIB GVR and GVRH are to be replaced by VAD VAG VAG+VAS VAH and VAV

Type TypeGVS Pressure regulator with gas solenoid valve Pressure regulator with gas solenoid valve VADGVI Airgas ratio control with gas solenoid valve Airgas ratio control with gas solenoid valve VAG

GVIB Airgas ratio control with gas solenoid valve and bypass valve

Airgas ratio control with gas solenoid valve and bypass valve VAG+VAS

GVRH Flow rate regulator with gas solenoid valve Flow rate regulator with gas solenoid valve VAHGVR Variable airgas ratio control with gas solenoid valve Variable airgas ratio control with solenoid valve VAV115125 Flange 38 Size 115

Size 125 on request

115125 Flange frac12 Size 115

Size 125 Size 1 DN 15 115

115125 Flange frac34 Size 115

Size 125 Size 1 DN 20 120

115125 Flange 1 Size 115

Size 125 Size 1 DN 25 125

232240 Flange 1 Size 232

Size 240 on request

232240 Flange 1frac12 Size 232

Size 240 Size 2 DN 40 240

350 Flange 1frac12 Size 350 on request350 Flange 2 Size 350 Size 3 DN 50 350ML MODULINE + Rp internal thread connection fl anges Rp internal thread RTML MODULINE + NPT internal thread connection fl anges NPT internal thread N01 pu max 100 mbar (15 psig) pu max 500 mbar (7 psig) 02 200 mbar (3 psig) 500 mbar (7 psig)

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 23

Replacement possibilities for MODULINE pressure regulators with gas solenoid valve gt GVS GVI GVIB GVR and GVRH are to be replaced by VAD VAG VAG+VAS VAH and VAV

ContinuationType Type

Quick opening Quick opening NF1 Control ratio 11 Control ratio 11 K Mains voltage 24 V DC Mains voltage 24 V DC K

ndash 100 V AC PQ 120 V AC 120 V AC Q

ndash 200 V AC YT 220240 V AC 230 V AC W3 Electrical connection via terminals Electrical connection via terminals 6 Electrical connection via socket Electrical connection via socket 9 Metal terminal connection box Electrical connection via terminals S Position indicator Position indicator with visual indicator SG Position indicator for 24 V Position indicator for 24 V with visual indicator GM Suitable for biologically produced methane Suitable for biologically produced methane

Pressure test point at the inlet Pressure test point at the inlet and outlet Outlet pressure pd -25

Outlet pressure pd 25 ndash 25 mbar (1 ndash 10 WC)

2 ndash 90 mbar (08 ndash 36 WC) 20 ndash 50 mbar (8 ndash 20 WC) -5035 ndash 100 mbar (14 ndash 40 WC) -100Standard seat A

ExampleGVS 350ML01T3with Rp 2 connection flanges

ExampleVAD 350RNW-100A

with test points

= standard = available Pressure test points may be attached at the left- andor right-hand side Position indicator with visual indicator can be attached at the left- or right-hand side

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 24

∆p [i

nch

WC]

Qn [SCFH]100 400 600 4000 60001000 200020 30 40 50 200 3006015 80

1

08

1

2

3

4

56

8

10

20

30

40

5060

80

100

200

∆p [m

bar]

5

8

3

20

10

30

40

80

60

300

400

50

04 06 1 2 3 4 5 808 10 20 30 402

03 60 100 200

100

200

500

1

3

2

04 06 08 1 2 3 4 5 6 8 10 20 30 40

04 06 08 1 2 3 4 5 6 8 10

200

80 10020 3003

03Qn [m3h]

02

50 60 80 100

40 50 60

VAD

115

B

VAD

120

AVA

D 12

5A

P1P2

VAD

240

AVA

D 35

0A

= natural gas (ρ = 080 kgm3) = propane (ρ = 201 kgm3) = air (ρ = 129 kgm3)

The characteristic flow rate curves have been meas-ured with the specified flanges and a fitted strainer If two or more valves are combined the pressure loss of each additional valve drops by approx 5

metric imperial

Enter densityFlow rate Qn

Inlet pressure pu

Outlet pressure pd

Product RV v

Pressure loss ∆p

∆pmin

5 Flow rate5 1 Selection example for VADNatural gas Flow rate Qmax = 30 m3h Inlet pressure pu = 80 mbar Outlet pressure pd = 60 mbarThe desired control ratio from high-fire to low-fire rate is RV = 101High fire ∆p = pu - pd = 20 mbar Point P1Low fire Point P2 Qmin = 26 m3h at ∆p = 20 mbar RV = Qmax Qmin = 1151

Point P1 and point P2 must be within the working range of a unit size We recommend that you select the smallest size to achieve the best control properties

5 1 1 Calculate VAD

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 25

∆p [i

nch

WC]

Qn [SCFH]100 400 600 4000 60001000 200020 30 40 50 200 3006015 80

1

08

1

2

3

4

56

8

10

20

30

40

5060

80

100

200

∆p [m

bar]

5

8

3

20

10

30

40

80

60

300

400

50

04 06 1 2 3 4 5 808 10 20 30 402

03 60 100 200

100

200

500

1

3

2

04 06 08 1 2 3 4 5 6 8 10 20 30 40

04 06 08 1 2 3 4 5 6 8 10

200

80 10020 3003

03Qn [m3h]

02

50 60 80 100

40 50 60

= pd min lt 5 mbar

VAG

VxH

VAV

115

BVA

GV

xHV

AV 12

0A

VAG

VxH

VAV

125

A

P1

P2

VAG

VxH

VAV

240

AVA

GV

xHV

AV 3

50A

= natural gas (ρ = 080 kgm3) = propane (ρ = 201 kgm3) = air (ρ = 129 kgm3)

The characteristic flow rate curves have been meas-ured with the specified flanges and a fitted strainer If two or more valves are combined the pressure loss of each additional valve drops by approx 5

5 2 Selection example for VAG VAH VRH VAV Natural gas Flow rate Qmax = 30 m3h Inlet pressure pu = 80 mbar Outlet pressure pd max VAG = 60 mbarThe desired control ratio from high-fire to low-fire rate is RV = 101High fire ∆p = pu - pd max = 20 mbar Point P1Low fire pd min = pd max RV2 = 06 mbar Qmin = Qmax RV = 3 m3h ∆p = pu - pd min = 794 mbar Point P2 select VAG 120APoint P1 and point P2 must be within the working range of a unit size We recommend that you select the smallest size to achieve the best control properties

metric imperial

Enter densityFlow rate Qn

Inlet pressure pu

Outlet pressure pd

Product RV v

5 2 1 Calculate VAG VxH VAV

Pressure loss ∆p

∆pmin

Flow rate

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 26

∆p [i

nch

WC]

Qn [SCFH]100 400 600 4000 60001000 200020 30 40 50 200 3006015 80

1

08

1

2

3

4

56

8

10

20

30

40

5060

80

100

200

∆p [m

bar]

5

8

3

20

10

30

40

80

60

300

400

50

04 06 2 3 4 5 808 10 20 30 402

03 60 100 200

100

200

500

1

3

2

04 06 08 1 2 3 4 5 6 8 10 20 30 40

04 06 08 1 2 3 4 5 6 8 10

200

80 10020 3003

03Qn [m3h]

02

50 60 80 100

40 50 60

VAG

115

N

P1VAG

125

N

VAG

120

N

VAG

240

NP2

VAG

350

N

= natural gas (ρ = 080 kgm3) = propane (ρ = 201 kgm3) = air (ρ = 129 kgm3)

The characteristic flow rate curves have been meas-ured with the specified flanges and a fitted strainer If two or more valves are combined the pressure loss of each additional valve drops by approx 5

5 3 Selection example for zero governor VAG NNatural gas Flow rate Qmax = 30 m3h Inlet pressure pu = 20 mbar Outlet pressure pd = 0 mbar (atmospheric pressure)The desired control ratio from high-fire to low-fire rate is RV = 101High fire ∆p = pu - pd max = 20 mbar Point P1Low fire Point P2 Qmin = 24 m3h at ∆p = 20 mbar RV = Qmax Qmin = 1231Point P1 and point P2 must be within the working range of a unit size We recommend that you select the smallest size to achieve the best control properties

metric imperial

Enter densityFlow rate Qn

Inlet pressure pu

Outlet pressure pd

Product RV

5 3 1 Calculate VAG N

Pressure loss ∆p

∆pmin

Flow rate

v

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 27

6 Selection6 1 Selection table for pressure regulator with solenoid valve VAD

Accessories right Accessories left

Type1) T R N F N K P Q Y W S2) G2) R2) L2) M20

cab

le g

land

Plug

with

soc

ket

Plug

with

out s

ocke

t

-25-50 -100 A B Scre

w p

lug

Pres

sure

test

poi

nt

DG

17V

C 3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

Scre

w p

lug

Pres

sure

test

poi

nt

DG

17V

C 3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

VAD 115

VAD 120

VAD 125

VAD 240

VAD 350

= standard = available1) The following nominal inlet fl ange diameters are also available size 1 with nominal diameter DN 10 size 2 with nominal diameters DN 25 DN 32 and DN 50 size 3 with nominal diameters DN 40 and DN 652) Position indicator and bypasspilot gas valve cannot be fi tted together on the same side3) Specify the test point for inlet pressure pu or outlet pressure pdHelp for selecting the pressure regulator VAD can be found on the ProFi DVD wwwkromschroedercom Products DVD Product fi nder ldquoProFirdquo

Order exampleVAD 240RNW-100A

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 28

Selection

6 2 Type code for VADCode DescriptionVAD Pressure regulator with solenoid valve1 ndash 3 SizeT T-product10 ndash 65 Nominal inlet and outlet diameterRNF

Rp internal threadNPT internal thread

ISO fl angeN Quick opening quick closingKPQYW

Mains voltage 24 V DCMains voltage 100 V AC 5060 HzMains voltage 120 V AC 5060 HzMains voltage 200 V AC 5060 HzMains voltage 230 V AC 5060 Hz

SG

Position indicator with visual indicatorPosition indicator for 24 V with visual indicator

RL

Viewed from the right (in the direction of fl ow)Viewed from the left (in the direction of fl ow)

-25-50-100

Outlet pressure pd 25 ndash 25 mbar20 ndash 50 mbar

35 ndash 100 mbarAB

Standard valve seatReduced valve seat

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 29

Selection

6 3 Selection table for airgas ratio control with solenoid valve VAG flow rate regulators VAH VRH

Type1) T R N F N K P Q Y W S2) G2) R2) L2) M20

cab

le g

land

Plug

with

soc

ket

Plug

with

out s

ocke

t

A B E K A N Scre

w p

lug

Pres

sure

test

poi

ntD

G 1

7VC

3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

Scre

w p

lug

Pres

sure

test

poi

ntD

G 1

7VC

3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

VAG 115 VAG 120 VAG 125 VAG 240 VAG 350

VAH 115 VAH 120 VAH 125 VAH 240 VAH 350

VRH 115 VRH 120 VRH 125 VRH 240 VRH 350

= standard = available1) The following nominal inlet fl ange diameters are also available size 1 with nominal diameter DN 10 size 2 with nominal di-

ameters DN 25 DN 32 and DN 50 size 3 with nominal diameters DN 40 and DN 652) Position indicator and bypasspilot gas valve cannot be fi tted together on the same side3) Specify the test point for inlet pressure pu or outlet pressure pdHelp for selecting the regulators can be found on the ProFi DVD wwwkromschroedercom Products DVD Product fi nder ldquoProFirdquo

Order exampleVAG 240RNWAE

Accessories right Accessories left

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 30

Selection

6 4 Type code for VAG VAH VRHCode DescriptionVAGVAHVRH

Airgas ratio control with solenoid valveFlow rate regulator with solenoid valve

Flow rate regulator1 ndash 3 SizeT T-product15 ndash 50 Nominal inlet and outlet diameterRNF

Rp internal threadNPT internal thread

ISO fl angeN1) Quick opening quick closingK1)

P1)

Q1)

Y1)

W1)

Mains voltage 24 V DCMains voltage 100 V AC 5060 HzMains voltage 120 V AC 5060 HzMains voltage 200 V AC 5060 HzMains voltage 230 V AC 5060 Hz

S1)

G1)Position indicator with visual indicator

Position indicator for 24 V with visual indicatorRL

Viewed from the right (in the direction of fl ow)Viewed from the left (in the direction of fl ow)

AB

Standard valve seatReduced valve seat

EKAN

Connection kit for air control pressure psaVAG VAH VRH compression fi tting

VAG plastic hose couplingVAG VAH VRH NPT 18 adapter

VAG zero governor1) Only available for VAG VAV VAH

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 31

6 5 Selection table for variable airgas ratio control with solenoid valve VAVAccessories right Accessories left

Type1) T R N F N K P Q Y W S2) G2) R2) L2) M20

cab

le g

land

Plug

with

soc

ket

Plug

with

out s

ocke

t

A B E K A Scre

w p

lug

Pres

sure

test

poi

ntD

G 1

7VC

3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

Scre

w p

lug

Pres

sure

test

poi

ntD

G 1

7VC

3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

VAV 115

VAV 120

VAV 125

VAV 240

VAV 350

= standard = available1) The following nominal inlet fl ange diameters are also available size 1 with nominal diameter DN 10 size 2 with nominal diameters DN 25 DN 32 and DN 50 size 3 with nominal diameters DN 40 and DN 652) Position indicator and bypasspilot gas valve cannot be fi tted together on the same side3) Specify the test point for inlet pressure pu or outlet pressure pdHelp for selecting the variable airgas ratio control VAV can be found on the ProFi DVD wwwkromschroedercom

Products DVD Product fi nder ldquoProFirdquo

Order exampleVAV 240RNWAK

Selection

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 32

Selection

6 6 Type code for VAVCode DescriptionVAV Variable airgas ratio control with solenoid valve1 ndash 3 SizeT T-product15 ndash 50 Nominal inlet and outlet diameterRNF

Rp internal threadNPT internal thread

ISO fl angeN Quick opening quick closingKPQYW

Mains voltage 24 V DCMains voltage 100 V AC 5060 HzMains voltage 120 V AC 5060 HzMains voltage 200 V AC 5060 HzMains voltage 230 V AC 5060 Hz

SG

Position indicator with visual indicatorPosition indicator for 24 V with visual indicator

RL

Viewed from the right (in the direction of fl ow)Viewed from the left (in the direction of fl ow)

AB

Standard valve seatReduced valve seat

EKA

Connection kit for air control pressure psa and combus-tion chamber control pressure psc

compression fi ttingplastic hose coupling

NPT 18 adapter

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 33

Selection

6 7 AccessoriesModularly configurable withndash Screw plugsndash Pressure test pointsndash Pressure switch DGVC for inlet

andor outlet pressurendash Tightness control TCndash Bypasspilot gas valve VBY 8 for

size 1ndash Bypasspilot gas valve VAS 1For further information see page 37 (Accessories)

Position indicator

Plug with socket

Plug

Screwplugs

Pressuretest points

Pressure switch DGC Tightness

control TC

Bypasspilot gas valve VBY 8 for size 1

Bypasspilot gas valve VAS 1

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 34

7 Project planning informationDo not store or install the unit in the open airThe inlet pressure pu and the outlet pressure pd can be meas-ured on both sides of the valve body To increase the control accuracy an external impulse line can be connected instead of the pressure test point pd

VAD

pu

pd

(psa)

VAGpd

pu

psa

psa

VAD measurement point for the gas outlet pressure pd on the regulator body A combustion chamber control line (psc) can be connected to connection psa for maintaining a constant burner capacityVAG additional measurement point for the air control pressure psa on the regulator body

VAV

psapsc

pu

pd

VAH VRH

pu

pd-

pdpsa-

psa

VAV measurement point for the outlet pressure pd on the regulator bodyVAH additional measurement points for the outlet pressure pd- and the air control pressure psapsa- on the regulator body

7 1 Installation

GFK

VAGVAH

GFKVAD

Sealing material and thread cuttings must not be allowed to get into the valve housing Install a filter upstream of every system

gt20 mmgt0 79

The unit must not be in contact with masonry Minimum clear-ance 20 mm (079 inches)Ensure that there is sufficient space for installation and ad-justment

le +100 degCle +212 degF

The solenoid body heats up during operation ndash depending on ambient temperature (max 60degC140degF) and intrinsic heating (approx 40degC104degF)

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 35

In the case of double solenoid valves the position of the con-nection box can only be changed by removing the actuator and reinstalling it offset by 90deg or 180deg

If more than three valVario controls are installed in line the controls must be supported

The seals in some gas compression fittings are approved for temperatures of up to 70degC (158degF) This temperature limit will not be exceeded if the flow through the pipe is at least 1 msup3h (3531 SCFH) of gas and the maximum ambient temperature is 50degC (122degF)

7 1 1 Installation position

pu ge 80 mbar(80 hPa32 WC)

VAD VAG VAH VRH VAV

In humid environments black solenoid actuator in the vertical upright position only

VAD VAG VAH VRH black solenoid actuator in the vertical upright position or tilted up to the horizontal not upside downVAG VAH horizontal position only if pu ge 80 mbar (32 WC))VAV installation in the vertical position only black solenoid actuator in the vertical upright positionTo ensure that the airgas ratio control VAG the flow rate regulator VAH VRH or the variable airgas ratio control VAV can react quickly when the load is changed the impulse line for the air control pressure psa and for VAV the impulse line for the combustion chamber control pressure psc should be kept as short as possible The tube internal diameter for the impulse line must always be ge 39 mm (015)

VAH VRHIt is not permitted to install a gas solenoid valve VAS down-stream of flow rate regulator VAH VRH and upstream of fine-adjusting valve VMV The VAS would no longer be able to perform its function as a second safety valve if installed in the above-mentioned position

M

VMV

VAH

VASVAS

pd-

psa-psa

VMV

VAH pd-

psa-psa

The measuring orifice in the air line for impulse lines psa and psa- must always be installed downstream of the air control valve

Project planning information gt Installation

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 36

VAVThe impulse line for the combustion chamber control pres-sure psc must be fitted so that no condensation can enter the pressure regulator but rather flows back into the combustion chamber

7 2 Setting the low-fire rate on VAG VAH VRH VAV

-10 +05-05

ndash

+1

-15

mbar

+15

06

1 152

3

N V

+ +ndash

+30 -15+15

ndash

-3

+5

mbar

-5

N

+

VAG VAH VRH VAV

If the burner operates at low-fire rate the gasair mixture can be changed using the parallel shift of the characteristic curve by turning the adjusting screw ldquoNrdquoAdjusting range at low fire VAG VAH VRH -5 to +5 mbar (-195 to +195 WC) VAV -15 to +15 mbar (-06 to +06 WC)

7 3 Setting the high-fire rate on VAVTo set the high-fire rate the transmission ratio is changed us-ing the adjusting screw ldquoVrdquo until the required flue gas values are achievedTransmission ratio V = pdpsa = 061 to 31The settings N and V can influence each other and must be repeated if necessary

+N+V

-V

-N

VAV

psa [mbar]

p d [m

bar]

7 3 1 CalculationWith no connection to the combustion chamber control pres-sure psc pd = V times psa + NWith connection to the combustion chamber control pressure psc (pd - psc) = V times (psa - psc) + N

Project planning information

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 37

pu pd

21579

4836

085310

189

142

8 Accessories8 1 Gas pressure switch DG VC for VAx VRHType Adjusting range [mbar]DG 17VC 2 to 17DG 40VC 5 to 40DG 110VC 30 to 110DG 300VC 100 to 300

Scope of delivery 1 times pressure switch for gas 2 times retaining screws 2 times sealing rings

8 2 Gas pressure switch DG VCT for VAx T VRH TType Adjusting range [WC]DG 17VCT 08 to 68DG 40VCT 2 to 16DG 110VCT 12 to 44DG 300VCT 40 to 120

Scope of delivery 1 times gas pressure switch with AWG 18 connection wires 2 times retaining screws 2 times sealing ringsMonitoring the inlet pressure pu the electrical plug of the pressure switch for gas points towards the inlet flangeMonitoring the outlet pressure pd the electrical plug of the pressure switch for gas points towards the outlet flange

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 38

A BC

D

FE

ACD

F

B

E

8 3 Bypass valvepilot gas valve VAS 18 3 1 VAS 1 attached to VADVAGVAHVAV 1Scope of delivery A 1 times bypasspilot gas valve VAS 1 B 4 times O-rings C 4 times double nuts D 4 times connection parts E 1 times mounting aidBypass valve VAS 1 F 2 times connection pipes if the bypass valve has a blind flange

at the outlet sidePilot gas valve VAS 1 F 1 times connection pipe 1 times sealing plug if the pilot gas valve

has a threaded flange at the outlet side

Accessories

8 3 2 VAS 1 attached to VADVAGVAHVAV 2 VADVAGVAHVAV 3Scope of delivery A 1 times bypasspilot gas valve VAS 1 B 4 times O-rings C 4 times spacer sleeves D 4 times connection parts E 1 times mounting aidBypass valve VAS 1 F 2 times connection pipes if the bypass valve has a blind flange

at the outlet sidePilot gas valve VAS 1 F 1 times connection pipe 1 times sealing plug if the pilot gas valve

has a threaded flange at the outlet side

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 39

2

3

456

810

20

30

405060

80100

∆p [m

bar]

005 01 02 03 05 08 1 2 3 4 51

3

2

Qn [m3h]

1

01

02

03

0405

08

003

002

6 8 10

005 01 02 03 05 08 1 2 3 4 5003 6 8 10

20

005 01 02 03 05 08 1 2 3 4 5003 6 8 10 20

30

∆p [i

nch

WC]

1

2

3

456

810

20

30

40

04

004

006

00801

02

03

0506

08

Qn [SCFH]10 40 60 100 200 3001 500 10002 3 4 5

120 306 8

21 3 4 5 6 7 8 910

8 3 3 Flow rate

The characteristic flow rate curves have been measured for bypass valve VAS 1 with connection pipe diameter 1 to 10 mm (004 to 04) and for the pilot gas valve with 10 mm (04) connection pipe

Bypass valve connection pipe diameter [mm]

Pilo

t gas

val

ve 1

0 m

m (0

4)

conn

ectio

n pi

pe d

iam

eter

Accessories gt Bypass valvepilot gas valve VAS 1

= natural gas (ρ = 080 kgm3) = propane (ρ = 201 kgm3) = air (ρ = 129 kgm3)

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 40

Accessories

8 4 Bypass valvepilot gas valve VBY 8 for VADVAGVAHVAV 1

B

C

AVBY 8

VAx 1

55

(217)40(157)

70 (276)

80(315)

Rp frac14(pilot gas valve)

For mounting on VAD VAG VAH VAV 1 and double solenoid valve VCD VCG VCH VCV 1

8 4 1 Scope of delivery VBY 8I as bypass valveA 1 times bypass valve VBY 8IB 2 times retaining screws with 4 times O-rings both retaining screws

have a bypass orificeC 1 times grease for o-rings

8 4 2 Scope of delivery VBY 8R as pilot gas valveA 1 times pilot gas valve VBY 8RB 2 times retaining screws with 5 x O-rings one retaining screw

has a bypass orifice (2 x O-rings) the other does not (3 x O-rings)

C 1 times grease for O-rings

8 4 3 SelectionType I R W Q K 6L -R -L E B D 05

VBY 8

Order exampleVBY 8RW6L-LED

8 4 4 Type codeCode DescriptionVBY Gas solenoid valve8 Nominal sizeIR

For internal gas pick-up as bypass valveFor external gas pick-up as pilot gas valve

KQW

Mains voltage 24 V DC Mains voltage 120 V AC 5060 HzMains voltage 230 V AC 5060 Hz

6L Electrical connection via plug and socket with LED-R-L

Attachment side of main valve right-hand sideAttachment side of main valve left-hand side

EB

Attached to the VAxEnclosed (separate packing unit)

05D

Nozzle diameter = 05 mm (002)Flow adjustment

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 41

2

01

02

03

05

081

3

456

810

20

30

405060

80100

∆p [m

bar]

1

3

201 02 03 05 1 2 3001 003 4

Qn [m3h]

02 03 05 1 2

01 02 05

002 006

002

002 006 1

0010006 005 01

001

0003

0006 2 3

VBY 8DVBY 805

∆p [i

nch

WC]

1

2

3

456

810

20

30

40

040506

08

1

Qn [SCFH]10 40 60 1005 2081 2 30402

01

02

03

004005006

008

Adjusting range

8 4 5 Flow rateVBY 8 D

+

-

The flow rate can be set by turning the flow rate restrictor (4 mm016 Allen screw) frac14 of a turn Flow rate 10 to 100

VBY 8 05The flow is routed through a 05 mm (002) nozzle and thus has a fixed characteristic flow rate curve Adjustment is not possible

8 4 6 Technical dataInlet pressure pu max 500 mbar (7 psig)Ambient temperature 0 to +60degC (32 to 140degF) no condensation permittedStorage temperature 0 to +40degC (32 to 104degF) no condensation permittedPower consumption 24 V = 8 W 120 V = 8 W 230 V = 95 WEnclosure IP 54

Accessories gt Bypass valvepilot gas valve VBY 8 for VADVAGVAHVAV 1

= natural gas (ρ = 080 kgm3) = propane (ρ = 201 kgm3) = air (ρ = 129 kgm3)

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 42

TC 116VB C

56(22)

49(193)

27(106)

A

A

VCx 1 VCx 2VCx 3

8 5 Tightness control TC 116Vfor VAx 1 ndash 3An adapter plate is required to attach the tightness control to the right- or left-hand side of the pressure regulator with gas solenoid valveScope of delivery A 1 times adapter plate B 2 times O-rings C 2 times retaining screwsFor attachment to left-hand side Order No 74922391 right-hand side Order No 74921995

8 6 Pressure test pointsTest points to check the inlet pressure pu and outlet pressure pdScope of delivery 1 x pressure test points with 1 x profiled sealing rings Order No 74923390

8 7 Cable gland setWhen wiring a double solenoid valve with pressure regula-tor VCx the connection boxes are to be connected using a cable gland setThe cable gland set can only be used if the connection boxes are at the same height and on the same side and if both valves are equipped either with or without a proof of closure switchVA 1 Order No 74921985 VA 2 Order No 74921986 VA 3 Order No 74921987

Accessories

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 43

A B

D

C

Accessories

8 9 Differential pressure orifice

Size PipeDN

Differential pressure orifi cewith outlet dia

1 15 17 mm 0671 20 25 mm 0981 25 30 mm 1182 40 46 mm 1813 50 58 mm 228

If pressure regulator VADVAGVAV 1 is retrofitted upstream of gas solenoid valve VAS 1 a DN 25 differential pressure orifice with outlet opening d = 30 mm (118) must be inserted at the outlet of the pressure regulatorIn the case of pressure regulator VAx 115 or VAx 120 the DN 25 differential pressure orifice must be ordered separately and retrofitted Order No 74922240

8 8 Seal set VA 1 ndash 3VA 1 Order No 74921988 VA 2 Order No 74921989 VA 3 Order No 74921990Scope of deliveryA 1 times double block seal B 2 times O-rings (flange) C 2 times O-rings (pressure switch) for pressure test pointscrew plug D 2 times sealing rings (flat sealing) and 2 times profiled sealing rings

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 44

BA

C

pd-

8 11 Attachment blockFor locked installation of pressure gauge and other acces-soriesScope of delivery A 1 times attachment block B 2 times self-tapping screws for installation C 2 times O-rings

Accessories

8 10 Retaining frameIn the event that a pressure regulator VAx is installed at a later point upstream of a gas solenoid valve VAS a measur-ing orifice VMO or a fine-adjusting valve VMV the retaining frame must be fitted at the inlet of the second device in order to fasten the differential pressure orifice at the regulator outlet Order the retaining frame separatelyRetaining frame for Size 1 Order No 74923029 Size 2 Order No 74923030 Size 3 Order No 74923031

8 12 Gas control lineFine-adjusting valve VMV can be installed on the flow rate regulator VAH for fine adjustment of the gas flow rateThe gas control line for gas outlet pressure pd- is available with 2 18 compression fittingsSize 1 Order No 74924458 Size 2 Order No 74924459

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 45

8 13 Measuring orifice VMOThe measuring orifice VMO is designed to reduce the gas and air flow rates and is installed downstream of the valVario control The measuring orifice is available with Rp internal thread (NPT internal thread) or flange to ISO 7005See wwwdocuthekcom Elster Kromschroumlder Krom-schroumlder LBE Products 03 Valves and butterfly valves valVario accessories Type of document Technical Informa-tion VMO

Accessories

8 14 Filter module VMFUsing the filter module VMF the gas flow upstream of the gas solenoid valve VAS and the airgas ratio control is cleaned The filter module is available with Rp internal thread (NPT internal thread) or flange to ISO 7005 and can also be supplied with fitted pressure switch as an optionSee wwwdocuthekcom Elster Kromschroumlder Krom-schroumlder LBE Products 03 Valves and butterfly valves valVario accessories Type of document Technical Informa-tion VMF

8 15 Fine-adjusting valve VMVThe flow rate is set using the fine-adjusting valve VMV The fine-adjusting valve is available with Rp internal thread (NPT internal thread) or flange to ISO 7005See wwwdocuthekcom Elster Kromschroumlder Krom-schroumlder LBE Products 03 Valves and butterfly valves valVario accessories Type of document Technical Infor-mation VMV

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 46

9 Technical dataGas types natural gas LPG (gaseous) biologically produced methane (max 01 -by-vol H2S) or clean air other gases on request The gas must be clean and dry in all temperature conditions and must not contain condensateCE and FM approved UL listed max inlet pressure pu 10 ndash 500 mbar (4 ndash 200 WC) FM approved (230 V AC 120 V AC 24 V DC) non opera-tional pressure 700 mbar (10 psig)ANSICSA approved (230 V AC 120 V AC 24 V DC) up to 350 mbar (5 psig)Opening time of the solenoid valve quick opening le 05 s Closing time quick closing lt 1 sMedium and ambient temperatures -20 to +60degC (-4 to +140degF) no condensation permittedStorage temperature -20 to +40degC (-4 to +104degF)Enclosure IP 65Valve housing aluminium valve seal NBRConnection flanges with internal thread Rp to ISO 7-1 NPT to ANSIASMESafety valve Class A to EN 161 Factory Mutual Research Class 7400 Process Control Valves (230 V AC 120 V AC 24 V DC) ANSI Z2121 and CSA 65 ANSI Z2118 and CSA 63Control class A to EN 88-1Control range up to 101

Mains voltage 230 V AC +10-15 5060 Hz 200 V AC +10-15 5060 Hz 120 V AC +10-15 5060 Hz 100 V AC +10-15 5060 Hz 24 V DC plusmn20Duty cycle 100Power factor of the solenoid coil cos φ = 09Power consumption

Type Voltage Power

VAx 1

24 V DC 25 W ndash100 V AC 25 W (26 VA)120 V AC 25 W (26 VA)200 V AC 25 W (26 VA)230 V AC 25 W (26 VA)

VAx 2 VAx 3

24 V DC 36 W ndash100 V AC 36 W (40 VA)120 V AC 40 W (44 VA)200 V AC 40 W (44 VA)230 V AC 40 W (44 VA)

VBY24 V DC 8 W ndash

120 V AC 8 W ndash230 V AC 95 W ndash

Cable gland M20 times 15Electrical connection cable with max 25 mm2 (AWG 12) or plug with socket to EN 175301-803

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 47

Position indicator contact rating

Type Voltage Min current(resistive load)

Max current(resistive load)

VAxS VCxS 12 ndash 250 V AC 5060 Hz 100 mA 3 AVAxG VCxG 12 ndash 30 V DC 2 mA 01 A

Position indicator switching frequency max 5 times per minute

Switching current [A]

Switching cyclescos φ = 1 cos φ = 06

01 500000 50000005 300000 250000

1 200000 1000003 100000 ndash

Limited to max 200000 cycles for heating systems

9 1 VADOutlet pressure pd VAD-25 25 ndash 25 mbar (1 ndash 10 WC) VAD-50 20 ndash 50 mbar (8 ndash 20 WC) VAD-100 35 ndash 100 mbar (14 ndash 40 WC)Combustion chamber control pressure psc (connection psa)

-20 to +20 mbar (-78 to +78 WC)

VAD

pu

pd

(psa)

9 2 VAGOutlet pressure pd 05 ndash 100 mbar (02 ndash 40 WC)Air control pressure psa 05 ndash 100 mbar (02 ndash 40 WC)

Adjusting range at low fire plusmn5 mbar (plusmn2 WC)Transmission ratio of gas to air 11The inlet pressure must always be higher than the air control pressure psa + pressure loss ∆p + 5 mbar (2 WC)

VAGpd

pu

psa

psa

VAGK 1 x 18 coupling for plastic hose (internal dia 39 mm (015) external dia 61 mm (024)) or VAGE 1 x 18 compression fitting for 6 times 1 tube or VAGA 1 x NPT 18 adapter or VAGN zero governor with breathing orifice

9 3 VAH VRHAir control pressure psa 06 ndash 100 mbar (024 ndash 40 WC) Differential air pressure ∆psa (psa - psa-) 06 ndash 50 mbar (024 ndash 197 WC) Differential gas pressure ∆pd (pd - pd-) 06 ndash 50 mbar (024 ndash 197 WC)Transmission ratio of gas to air 11The inlet pressure must always be higher than the differen-tial air pressure ∆psa + pressure loss ∆p + max gas pres-sure on burner + 5 mbar (2 WC)Adjusting range at low fire plusmn5 mbar (plusmn2 WC)

Technical data

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 48

VAHVRH

pd-

pu

psa-

psa

Connection of the air control pressure psaVAHE VRHE 3 x 18 compression fitting for 6 times 1 tube or VAHA VRHA 3 x NPT 18 adapter

9 4 VAVOutlet pressure pd 05 ndash 30 mbar (02 ndash 117 WC)Air control pressure psa 04 ndash 30 mbar (015 ndash 117 WC)Combustion chamber control pressure psc

-20 to +20 mbar (-78 to +78 WC)Min control pressure differential psa - psc 04 mbar (015 WC)Min pressure differential pd - psc 05 mbar (02 WC)Adjusting range at low fire plusmn15 mbar (plusmn06 WC)Transmission ratio of gas to air 061 to 31The inlet pressure pu must always be higher than the air control pressure psa times transmission ratio V + pressure loss ∆p + 15 mbar (06 WC)

pu

pd psapsc

VAV

VAVK 2 x plastic hose couplings (internal dia 39 mm (015) external dia 61 mm (024)) or VAVE 2 x 18 compression fitting for 6 times 1 tube or VAVA 2 x NPT 18 adapter

Technical data

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 49

9 5 Safety-specific characteristic values for VAx 1 ndash 3For SILSuitable for Safety Integrity Level SIL 1 2 3

Diagnostic coverage DC 0

Type of subsystem Type A to EN 61508-2 74312

Operating mode High demand mode pursu-ant to EN 61508-4 3512

For PLSuitable for Performance Level PL a b c d e

Category B 1 2 3 4Common cause failure CCF gt 65Application of essential safety requirements Satisfied

Application of tried-and-tested safety requirements Satisfied

For SIL and PL

B10d value

Operating cyclesVAD VAG VAV VAH 1 10094360VAD VAG VAV VAH 2 8229021VAD VAG VAV VAH 3 6363683

Hardware fault tolerance (1 valve) HFT 0

Hardware fault tolerance (2 valves) HFT 1

Safe failure fraction SFF gt 90Fraction of undetected com-mon cause failures β ge 2

Max service life under operating conditions10 years after date of production plus max 12 year in stor-age prior to first use or once the given number of operating cycles has been reached depending on which is achieved firstThe devices are suitable for single-channel systems (HFT = 0) up to SIL 2PL d and up to SIL 3PL e when two re-dundant valves are installed in a double-channel architecture (HFT = 1) provided that the complete system complies with the requirements of EN 61508ISO 13849

For a glossary of terms see page 53 (Glossary)

Technical data

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 50

nop 1hnop 1a

sB10d

T10d aPFHD (1 VAx) 1h

PFHD (2 VAx) 1h

PFDavg (1 VAx)

PFDavg (2 VAx)

Technical data gt Safety-specific characteristic values for VAx 1 ndash 3

9 5 1 Determining the PFHD value the λD value and the MTTFd value

PFHD = λD = x nop= 1MTTFd

01B10d

PFDavg = x λD x 24 x 365 x T10d 12

Type

Cycle time

suitable for

suitable for

PFHD = Probability of dangerous failure (HDM = high de-mand mode) [1hour]PFDavg = Average probability of dangerous failure on de-mand (LDM = low demand mode)λD = Mean dangerous failure rate [1hour]MTTFd = Mean time to dangerous failure [hours]nop = Demand rate (mean number of annual operations) [1hour]

9 5 2 Calculating the PFHD and PFDavg

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 51

VAD VAG VAH VAV

H1

Rp frac14(NPT frac14)

H2

E

LF

F

H4

H3

B

VAxS VAxF

L2G

G

Technical data

9 6 Dimensions

Type

Connec-tion Dimensions

WeightRpNPT DN

L L2 E F G H1 H2 H3 H4 Bmm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch kg lbs

VAx 115 12 15 75 29 ndash ndash 75 29 15 06 ndash ndash 143 56 82 32 161 63 117 46 97 38 18 40VAH 115 12 15 75 29 ndash ndash 75 29 15 06 ndash ndash 143 56 100 39 161 63 135 53 97 38 2 44VAx 120 34 20 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 82 33 161 63 117 46 97 38 19 42VAH 120 34 20 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 100 39 161 63 135 53 97 38 21 46VAx 125 1 25 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 82 33 161 63 117 46 97 38 19 42VAH 125 1 25 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 100 39 161 63 135 53 97 38 21 46VAx 240 112 40 128 50 200 79 85 33 29 11 66 26 170 67 112 44 191 75 162 64 125 49 44 97VAH 240 112 40 128 50 200 79 85 33 29 11 66 26 170 67 132 52 191 75 182 72 125 49 47 104VAx 350 2 50 155 61 230 91 85 33 36 14 74 29 180 70 135 53 201 79 196 77 160 63 61 134VAH 350 2 50 155 61 230 91 85 33 36 14 74 29 180 70 156 61 201 79 217 85 160 63 64 141

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 52

10 Converting unitssee wwwadlatusorg

11 Maintenance cyclesAt least once per annum at least twice per annum for biologi-cally produced methaneIf the flow rate drops clean the strainer

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 53

12 Glossary12 1 Diagnostic coverage DCMeasure of the effectiveness of diagnostics which may be determined as the ratio between the failure rate of detected dangerous failures and the failure rate of total dangerous failuresNOTE Diagnostic coverage can exist for the whole or parts of a safety-related system For example diagnostic cover-age could exist for sensors andor logic system andor final elements Unit see EN ISO 13849-12008

12 2 Mode of operationHigh demand mode or continuous modeOperating mode where the frequency of demands for opera-tion made on a safety-related system is greater than one per year or greater than twice the proof-test frequencysee EN 61508-42008

12 3 CategoryClassification of the safety-related parts of a control system in respect of their resistance to faults and their subsequent behaviour in the fault condition and which is achieved by the structural arrangement of the parts fault detection andor by their reliability see EN ISO 13849-12008

12 4 Common cause failure CCFFailures of different items resulting from a single event where these failures are not consequences of each othersee EN ISO 13849-12008

12 5 Fraction of undetected common cause failures β Fraction of undetected failures of redundant components due to a single event whereby these failures are not based on mutual causesNOTE β is expressed as a fraction in the equations and as a percentage elsewheresee EN 61508-62010

12 6 B10d valueMean number of cycles until 10 of the components fail dan-gerouslysee EN ISO 13849-12008

12 7 T10d valueMean time until 10 of the components fail dangerouslysee EN ISO 13849-12008

12 8 Hardware fault tolerance HFTA hardware fault tolerance of N means that N + 1 is the mini-mum number of faults that could cause a loss of the safety functionsee IEC 61508-22010

12 9 Mean dangerous failure rate λD Mean rate of dangerous failures during operation time (T10d) Unit 1hsee EN ISO 13849-12008

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 54

12 10 Safe failure fraction SFFFraction of safe failures related to all failures which are as-sumed to appearsee EN 13611A22011

12 11 Probability of dangerous failure PFHD Value describing the likelihood of dangerous failure per hour of a component for high demand mode or continuous mode Unit 1hsee EN 13611A22011

12 12 Mean time to dangerous failure MTTFd Expectation of the mean time to dangerous failuresee EN ISO 13849-12008

12 13 Demand rate nop Mean number of annual operationssee EN ISO 13849-12008

12 14 Average probability of dangerous failure on demand PFDavg (LDM = 1 ndash 10 switching cyclesyear)Average probability of a dangerous failure of the safety function on demand (LDM = low demand mode)see EN 61508-6

Glossary

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415

Finally we are offering you the opportunity to assess this ldquoTechnical Information (TI)rdquo and to give us your opinion so that we can improve our documents further and suit them to your needs

ClarityFound information quicklySearched for a long timeDidnrsquot find informationWhat is missing

ComprehensionCoherentToo complicatedNo answer

ScopeToo littleSufficientToo wideNo answer

No answer

NavigationI can find my way aroundI got ldquolostrdquoNo answer

UseTo get to know the productTo choose a productPlanningTo look for information

My scope of functionsTechnical departmentSalesNo answer

Remarks

(Adobe Reader 7 or higher required) wwwadobecom

Elster GmbH Postfach 2809 middot 49018 Osnabruumlck Strotheweg 1 middot 49504 Lotte (Buumlren) GermanyT +49 541 1214-0 F +49 541 1214-370 infokromschroedercomwwwkromschroedercom

The current addresses of our international agents are available on the Internetwwwkromschroederdeindexphpid=718ampL=1

We reserve the right to make technical modifications in the interests of progressCopyright copy 2015 Elster GmbH All rights reserved

Contact

Feedback

0325

0530

  • Pressure regulators with solenoid valve VAD VAG VAV VAH
  • Flow rate regulator VRH
  • Pressure regulators with double solenoid valve VCD VCG VCV VCH
  • Contents
  • 1 Application
    • 11 Examples of application
      • 111 Constant pressure control
      • 112 Constant pressure control with two gas solenoid valves
      • 113 Constant pressure control with max pressure switch
      • 114 Constant pressure control with non-controlled pilot gas outlet
      • 115 Modulating control
      • 116 Modulating control with two gas solenoid valves
      • 117 Modulating control with two gas solenoid valves and inlet pressure switch
      • 118 HighLow control
      • 119 Zero pressure control
      • 1110 Staged flow rate control
      • 1111 Continuous or staged flow rate control
      • 1112 Modulating control with variable airgas ratio control with gas solenoid valve
      • 1113 Modulating control in residential heat generation
          • 2 Certification
          • 3 Function
            • 31 VAD VAG VAH VRH VAV
              • 311 Pressure regulator for gas VAD
              • 312 Airgas ratio control VAG
              • 313 Flow rate regulators VAH VRH
              • 314 Variable airgas ratio control VAV
              • 315 Pressure regulator with gas solenoid valve VAxS position indicator with visual indicator
                • 32 Animation
                • 33 Connection diagram
                  • 331 VAx with M20 cable gland
                  • 332 VAx with plug
                  • 333 VAS with VADVAGVAHVAV with M20 cable gland
                  • 334 VAS with VADVAGVAHVAV with plug
                      • 4 Replacement possibilities for MODULINE pressure regulators with gas solenoid valve
                        • 41 GVS GVI GVIB GVR and GVRH are to be replaced by VAD VAG VAG+VAS VAH and VAV
                          • 5 Flow rate
                            • 51 Selection example for VAD
                              • 511 Calculate VAD
                                • 52 Selection example for VAG VAH VRH VAV
                                  • 521 CalculateVAG VxHVAV
                                    • 53 Selection example for zero governor VAGN
                                      • 531 Calculate VAGN
                                          • 6 Selection
                                            • 61 Selection table for pressure regulator with solenoid valve VAD
                                            • 62 Type code for VAD
                                            • 63 Selection table for airgas ratio control with solenoid valve VAG flow rate regulators VAH VRH
                                            • 64 Type code for VAG VAH VRH
                                            • 65 Selection table for variable airgas ratio control with solenoid valve VAV
                                            • 66 Type code for VAV
                                            • 67 Accessories
                                              • 7 Project planning information
                                                • 71 Installation
                                                  • 711 Installation position
                                                    • 72 Setting the low-fire rate on VAG VAH VRH VAV
                                                    • 73 Setting the high-fire rate on VAV
                                                      • 731 Calculation
                                                          • 8 Accessories
                                                            • 81 Gas pressure switch DGVC for VAx VRH
                                                            • 82 Gas pressure switch DGVCT for VAxT VRHT
                                                            • 83 Bypass valvepilot gas valve VAS 1
                                                              • 831 VAS 1 attached to VADVAGVAHVAV 1
                                                              • 832 VAS 1 attached to VADVAGVAHVAV 2 VADVAGVAHVAV 3
                                                              • 833 Flow rate
                                                                • 84 Bypass valvepilot gas valve VBY 8 for VADVAGVAHVAV 1
                                                                  • 841 Scope of delivery VBY 8I as bypass valve
                                                                  • 842 Scope of delivery VBY 8R as pilot gas valve
                                                                  • 843 Selection
                                                                  • 844 Type code
                                                                  • 845 Flow rate
                                                                  • 846 Technical data
                                                                    • 85 Tightness control TC 116V
                                                                    • 86 Pressure test points
                                                                    • 87 Cable gland set
                                                                    • 88 Seal set VA 1thinspndashthinsp3
                                                                    • 89 Differential pressure orifice
                                                                    • 810 Retaining frame
                                                                    • 811 Attachment block
                                                                    • 812 Gas control line
                                                                    • 813 Measuring orifice VMO
                                                                    • 814 Filter module VMF
                                                                    • 815 Fine-adjusting valve VMV
                                                                      • 9 Technical data
                                                                        • 91 VAD
                                                                        • 92 VAG
                                                                        • 93 VAH VRH
                                                                        • 94 VAV
                                                                        • 95 Safety-specific characteristic values for VAx 1thinspndashthinsp3
                                                                          • 951 Determining the PFHD value the λD value and the MTTFd value
                                                                          • 952 Calculating the PFHD and PFDavg
                                                                            • 96 Dimensions
                                                                              • 10 Converting units
                                                                              • 11 Maintenance cycles
                                                                              • 12 Glossary
                                                                                • 121 Diagnostic coverage DC
                                                                                • 122 Mode of operation
                                                                                • 123 Category
                                                                                • 124 Common cause failure CCF
                                                                                • 125 Fraction of undetected common cause failures β
                                                                                • 126 B10d value
                                                                                • 127 T10d value
                                                                                • 128 Hardware fault tolerance HFT
                                                                                • 129 Mean dangerous failure rate λD
                                                                                • 1210 Safe failure fraction SFF
                                                                                • 1211 Probability of dangerous failure PFHD
                                                                                • 1212 Mean time to dangerous failure MTTFd
                                                                                • 1213 Demand rate nop
                                                                                • 1214 Average probability of dangerous failure on demand PFDavg
                                                                                  • Feedback
                                                                                  • Contact
                                                                                      1. naechste_Seite 24
                                                                                      2. naechste Seite 18
                                                                                      3. naechste Seite 6
                                                                                      4. naechste Seite 16
                                                                                      5. naechste Seite 14
                                                                                      6. naechste Seite 25
                                                                                      7. naechste_Seite 11
                                                                                      8. naechste_Seite 17
                                                                                      9. fbArbeitspunkt_Min Ja
                                                                                      10. fbArbeitspunkt Ja
                                                                                      11. ftProgramm Standard-Programm
                                                                                      12. fz_kv
                                                                                      13. fz_pe 80
                                                                                      14. fz_pG 60
                                                                                      15. fzDelta_p_Soll 20
                                                                                      16. ftEinheit_Druck mbar
                                                                                      17. fatTyp [115]
                                                                                      18. fbArbeitspunkt_Min_2 Ja
                                                                                      19. fbArbeitspunkt_2 Ja
                                                                                      20. ftRegler_Typ VAG
                                                                                      21. ftProgramm_2 Standard-Programm
                                                                                      22. fz_kv_2
                                                                                      23. fatMedium [08]
                                                                                      24. fzDichte 08
                                                                                      25. ftEinheit_Dichte kgm3
                                                                                      26. fzV_Norm 30
                                                                                      27. ftEinheit_Volstrom m3h
                                                                                      28. fz_pe_2 80
                                                                                      29. fz_pG_2 60
                                                                                      30. fzDelta_p_Soll_2 20
                                                                                      31. ftEinheit_Druck2 [mbar]
                                                                                      32. ftEinheit_Geschw [ms]
                                                                                      33. fatTyp_2 [10954451150103322]
                                                                                      34. fbArbeitspunkt_Min_3 Ja
                                                                                      35. fbArbeitspunkt_3 Ja
                                                                                      36. ftProgramm_3 Standard-Programm
                                                                                      37. fz_kv_3
                                                                                      38. fz_pe_3 20
                                                                                      39. fz_pG_3 0
                                                                                      40. fzDelta_p_Soll_3 20
                                                                                      41. fatTyp_3 [123]
                                                                                      42. fatSchaltleistung [6363683]
                                                                                      43. fz_nop_Stunde 1
                                                                                      44. fz_nop_Jahr 8760
                                                                                      45. fzZyklus 3600
                                                                                      46. fzB10d 6363683
                                                                                      47. fzT10d 10
                                                                                      48. fzPFHd_1V 15714170551864384e-8
                                                                                      49. fzPFDavg_1V
                                                                                      50. ftGeeignet_1V PL d SIL 2
                                                                                      51. fzPFHd_2V 33505832253532625e-10
                                                                                      52. fzPFDavg_2V
                                                                                      53. ftGeeignet_2V PL e SIL 3
                                                                                      54. ftUebersicht Off
                                                                                      55. ftVerstaendlichkeit Off
                                                                                      56. ftFehlende_Info
                                                                                      57. ftUmfang Off
                                                                                      58. ftVerwendung_1 Off
                                                                                      59. ftVerwendung_2 Off
                                                                                      60. ftVerwendung_3 Off
                                                                                      61. ftVerwendung_4 Off
                                                                                      62. ftNavigation Off
                                                                                      63. ftTaetigkeitsbereich Off
                                                                                      64. ftBemerkung
                                                                                      65. Michael Rehkamp Elster Kromschroumlder>btnSenden
Page 9: VAD, VAG, VAV, VAH, VRH, VCD, VCG, VCV, VCH · PDF fileVAD, VAG, VAH, VAV, VRH, VCD, VCG, VCV, VCH · Edition 04.15 6 VAD VAD VAS 1 .1 Examples of application 1 .1 .1 Constant pressure

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 9

DGCmin

PZL

psa

psa

M

IC + BVA

VAS

VAG

psa

DGCmin

PZL

psa

M

IC 40 + BVA

VAS

VAG

VAS 1

1 1 7 Modulating control with two gas solenoid valves and inlet pressure switchIn this case the minimum inlet pressure pu is monitored by the pressure switch DGC The simple attachment of the pressure switch module makes instal-lation easier

1 1 8 HighLow controlAt high fire the gas outlet pressure pd follows the air control pressure psa The ratio of gas pressure to air pressure re-mains constant Low fire is determined via the bypass valve VAS 1 Here as well the simple attachment of the bypass valve module makes installation easier

Application gt Examples of application

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 10

Venturi

DGCmin

PZL

M

IC + BVA

VASVAGN

1 1 9 Zero pressure controlIn this application the control air pres-sure is the atmospheric air pressure The air flow rate generates a negative pressure in the gas pipe via the Venturi This negative pressure is compensated by the airgas ratio control with gas solenoid valve VAGN The greater the negative pressure the greater the gas flow rate

Application gt Examples of application

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 11

BVHM + MB7L

VMV

ECOMAX

VASN

BCU BZA

Prozess SteuerungProcess Control (PCC)

AKT

psa-

psa

pd-

VAH

1 1 10 Staged flow rate controlThis application shows the VAH on a self recuperative burnerThe pressure loss in the recuperator de-pends on the furnace or kiln temperature When the furnace or kiln temperature is increased (at a constant air supply pres-sure) the flow rate drops This change in the air flow rate is measured by the orifice and the VAH changes the gas volume accordinglyThe air index (lambda) can be set using the fine-adjusting valve VMV

Application gt Examples of application

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 12

M

IC + BVA

VMV

VMO

VAH

VAS

psa-psa

pd-

psa

psc

DGCmin

PZL

psa

psc

M

IC + BVA

VAS VAV

1 1 11 Continuous or staged flow rate controlThis application shows flow rate control for a radiant tube burner system with plug-in recuperator for air preheatingThere are temperature-dependent air pressure losses in the recuperator The ratio of gas pressure to air pressure does not remain constant The fluctuating air flow rate is measured at the measuring orifice VMO and the VAH controls the gas flow rate proportionallyThe air index (lambda) can be set using the fine-adjusting valve VMV

Application gt Examples of application

1 1 12 Modulating control with variable airgas ratio control with gas solenoid valveThe ratio of gas pressure to air pressure can be adjusted infinitely between 061 and 31 Pressure fluctuations in the com-bustion chamber can be compensated via the combustion chamber control pressure psc see page 15 (Function)

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 13

DGCmin

PZL

psa

psc

VAS VAV

1 1 13 Modulating control in residential heat generationThis application shows the variable airgas ratio control with solenoid valve VAV fitted to a modulating-controlled forced draught burnerThe combustion air volume is set via a butterfly valve for air or by adjusting the fan speed

Application gt Examples of application

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 14

2 CertificationCertificates ndash see Docuthek

VAD VAG VAV VAH certified to SIL and PL

For systems up to SIL 3 pursuant to EN 61508 and PL e pursu-ant to ISO 13849

VAD VAG VAV VAHEU certified pursuant to

ndash Gas Appliances Directive (2009142EC) in conjunction with EN 13611 EN 161 EN 88-1 EN 126 and EN 1854

Meets the requirements of thendash Low Voltage Directive (200695EC)ndash EMC Directive (2004108EC)

VAD VAG VAV VAH FM approved

Factory Mutual Research Class 7400 Process Control Valves Designed for applications pursuant to NFPA 85 and NFPA 86 www approvalguide com

VAD VAG ANSICSA approved

American National Standards InstituteCanadian Standards Association ndash ANSI Z21 21CSA 6 5 ANSI Z21 18 and CSA 6 3

wwwcsagrouporg ndash Class number 3371-83 (natural gas LPG) 3371-03 (natural gas propane)

VAD VAG VAV UL listed

Underwriters Laboratories ndash UL 429 ldquoElectrically operated valvesrdquo wwwulcom Tools (at the bottom of the page) Online Certifications Directory

VAD VAG VAV AGA approved

AGA

Australian Gas Association Approval No 5319 httpwww aga asn auproduct_directory

Eurasian Customs Union

The product VAD VAG VAV VAH VCD VCG VCV VCH meets the technical specifications of the Eurasian Customs Union (the Russian Federation Belarus Kazakhstan)

Approval does not apply for 100 V AC and 200 V AC

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 15

3 Function3 1 VAD VAG VAH VRH VAVThe regulator is closed when it is disconnected from the power supplyOpening connect the system to the electrical power supply (alternating voltage will be rectified) The blue LED lights up The coilrsquos magnetic field pulls the armature upwards and clears the supply nozzle for the gas inlet pressure pu The gas passes through the internal impulse tube to the adjustment diaphragm and then pushes the valve disc open The outlet pressure is applied to the servo diaphragm via the internal feedback

The servo regulator then maintains a set constant outlet pres-sure pd

3 1 1 Pressure regulator for gas VADThe nominal outlet pressure pd is defined by the control spring

Servoregulator

Valve

Armature

Valve disc

Adjustmentdiaphragm

Servodiaphragm

Internalfeedback

Controlspring

Solenoid coil

Supplynozzle

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 16

3 1 2 Airgas ratio control VAGThe airgas ratio control VAG controls the outlet pressure pd depending on the variable air control pressure psaThe ratio of gas pressure to air pressure remains constant 11 The VAG is suitable for a control range up to 101If the burner operates at low-fire rate the gasair mixture can be changed by adjusting the zero point spring ldquoNrdquo

Function

psa

pd

Zero point setting N zero point spring

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 17

Function

3 1 3 Flow rate regulators VAH VRHThe flow rate regulators VAH VRH control the gas flow rate depending on the variable air flow rate The ratio of gas flow rate to air flow rate remains constant If the burner operates at low-fire rate the gasair mixture can be changed by adjusting the zero point spring ldquoNrdquoIn addition flow rate regulator VAH is designed as a gas solenoid valve and shuts off the gas or air supply safely

psa

psa-

pd-

pdInternal feedback

Zero point setting N zero point spring

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 18

3 1 4 Variable airgas ratio control VAVThe servo regulator maintains a set constant outlet pressure pd The variable airgas ratio control VAV controls the outlet pressure pd depending on the variable air control pressure psa The ratio of gas pressure to air pressure remains constantThe settings N and V can be changed and read off from both sides of the unit using the adjusting screwsThe ratio of gas pressure to air pressure at low-fire rate can be changed by adjusting the zero point setting N By turning the adjusting screw ldquoNrdquo the force of the zero point spring and thus the zero point is changed by plusmn 15 mbar (06 WC) see page 34 (Project planning information)The high-fire rate is set by turning the adjusting screw ldquoVrdquo until the required flue gas values are achieved see page 34 (Project planning information) The ratio of gas pressure to air pressure can be set from 061 to 31The settings N and V influence each other and the adjustment process must be repeated if necessaryThe outlet pressure pd is applied to the servo diaphragm via the internal feedback The combustion chamber control pres-sure psc is transmitted to the space under the air and servo diaphragms via an impulse lineThe pressure differential psa - psc is achieved on the air diaphragm and the pressure differential pd - psc on the servo diaphragm This ensures that pressure fluctuations in the combustion cham-ber can be compensated The flue gas values remain constant in the case of fluctuations in the combustion chamber pressure (pd - psc) = (psa - psc) times V + N

Function

pdpsc

psa

Air diaphragm

Transmission ratio V

Zero point setting N zero point spring

Internalfeedback

Adjustment diaphragm

Servo diaphragm

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 19

1 COM

2 NO

3 NC

3 1 5 Pressure regulator with gas solenoid valve VAx S position indicator with visual indicatorOpening when the pressure regulator is opened the posi-tion indicator switches The visual indicator is activated The ldquoopenrdquo signal is marked in red The double valve seat opens to release the volume of gasClosing the pressure regulator VAx is disconnected from the voltage supply and the closing spring presses the double valve disc on to the valve seat The position indicator is actuated The visual indicator is white for ldquoclosedrdquoThe actuator cannot be rotated on a pressure regulator with a position indicator and a visual indicatorNOTE NFPA 86 ndash the following must be taken into account as soon as the capacity of the pilot or main burner exceeds 117 kW (400000 BTUh) safety shut-off valve VASS must be fitted with a proof of closure overtravel switch with a visual position indicator and the burner-side pressure regulator with gas solenoid valve VAxS must also be fitted with a position indicator with visual indicator The closed position can be verified using the proof of closure switch of the gas solenoid valve VASS

Function

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 20

3 2 AnimationThe interactive animation shows the function of the valVario controls VADVAGVAHVAVClick on the picture The animation can be controlled using the control bar at the bottom of the window (as on a DVD player) To play the animation you will need Adobe Reader 7 or a newer version If you do not have Adobe Reader on your system you can download it from the Internet

Go to wwwadobecom click on ldquoAdobe Readerrdquo at the bottom of the page and follow the instructionsIf the animation does not start to play you can download it from the document library (wwwdocuthekcom) as an inde-pendent application

Function

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 21

3 3 Connection diagramWiring to EN 60204-1Connection diagram for VAxS with position indicator ndash see page 19 (Pressure regulator with gas solenoid valve VAxS position indicator with visual indicator)

3 3 1 VAx with M20 cable gland

L1 (+)

N (ndash)

3 3 2 VAx with plug

1 = N (-)

2 = L1 (+)

3 3 3 VAS with VADVAGVAHVAV with M20 cable glandL1V1 (+)

N (-)

L1V2 (+)

3 3 4 VAS with VADVAGVAHVAV with plug2 = L1V1 (+)

1 = N (-)

3 = L1V2 (+)

Function

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 22

4 Replacement possibilities for MODULINE pressure regulators with gas solenoid valve4 1 GVS GVI GVIB GVR and GVRH are to be replaced by VAD VAG VAG+VAS VAH and VAV

Type TypeGVS Pressure regulator with gas solenoid valve Pressure regulator with gas solenoid valve VADGVI Airgas ratio control with gas solenoid valve Airgas ratio control with gas solenoid valve VAG

GVIB Airgas ratio control with gas solenoid valve and bypass valve

Airgas ratio control with gas solenoid valve and bypass valve VAG+VAS

GVRH Flow rate regulator with gas solenoid valve Flow rate regulator with gas solenoid valve VAHGVR Variable airgas ratio control with gas solenoid valve Variable airgas ratio control with solenoid valve VAV115125 Flange 38 Size 115

Size 125 on request

115125 Flange frac12 Size 115

Size 125 Size 1 DN 15 115

115125 Flange frac34 Size 115

Size 125 Size 1 DN 20 120

115125 Flange 1 Size 115

Size 125 Size 1 DN 25 125

232240 Flange 1 Size 232

Size 240 on request

232240 Flange 1frac12 Size 232

Size 240 Size 2 DN 40 240

350 Flange 1frac12 Size 350 on request350 Flange 2 Size 350 Size 3 DN 50 350ML MODULINE + Rp internal thread connection fl anges Rp internal thread RTML MODULINE + NPT internal thread connection fl anges NPT internal thread N01 pu max 100 mbar (15 psig) pu max 500 mbar (7 psig) 02 200 mbar (3 psig) 500 mbar (7 psig)

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 23

Replacement possibilities for MODULINE pressure regulators with gas solenoid valve gt GVS GVI GVIB GVR and GVRH are to be replaced by VAD VAG VAG+VAS VAH and VAV

ContinuationType Type

Quick opening Quick opening NF1 Control ratio 11 Control ratio 11 K Mains voltage 24 V DC Mains voltage 24 V DC K

ndash 100 V AC PQ 120 V AC 120 V AC Q

ndash 200 V AC YT 220240 V AC 230 V AC W3 Electrical connection via terminals Electrical connection via terminals 6 Electrical connection via socket Electrical connection via socket 9 Metal terminal connection box Electrical connection via terminals S Position indicator Position indicator with visual indicator SG Position indicator for 24 V Position indicator for 24 V with visual indicator GM Suitable for biologically produced methane Suitable for biologically produced methane

Pressure test point at the inlet Pressure test point at the inlet and outlet Outlet pressure pd -25

Outlet pressure pd 25 ndash 25 mbar (1 ndash 10 WC)

2 ndash 90 mbar (08 ndash 36 WC) 20 ndash 50 mbar (8 ndash 20 WC) -5035 ndash 100 mbar (14 ndash 40 WC) -100Standard seat A

ExampleGVS 350ML01T3with Rp 2 connection flanges

ExampleVAD 350RNW-100A

with test points

= standard = available Pressure test points may be attached at the left- andor right-hand side Position indicator with visual indicator can be attached at the left- or right-hand side

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 24

∆p [i

nch

WC]

Qn [SCFH]100 400 600 4000 60001000 200020 30 40 50 200 3006015 80

1

08

1

2

3

4

56

8

10

20

30

40

5060

80

100

200

∆p [m

bar]

5

8

3

20

10

30

40

80

60

300

400

50

04 06 1 2 3 4 5 808 10 20 30 402

03 60 100 200

100

200

500

1

3

2

04 06 08 1 2 3 4 5 6 8 10 20 30 40

04 06 08 1 2 3 4 5 6 8 10

200

80 10020 3003

03Qn [m3h]

02

50 60 80 100

40 50 60

VAD

115

B

VAD

120

AVA

D 12

5A

P1P2

VAD

240

AVA

D 35

0A

= natural gas (ρ = 080 kgm3) = propane (ρ = 201 kgm3) = air (ρ = 129 kgm3)

The characteristic flow rate curves have been meas-ured with the specified flanges and a fitted strainer If two or more valves are combined the pressure loss of each additional valve drops by approx 5

metric imperial

Enter densityFlow rate Qn

Inlet pressure pu

Outlet pressure pd

Product RV v

Pressure loss ∆p

∆pmin

5 Flow rate5 1 Selection example for VADNatural gas Flow rate Qmax = 30 m3h Inlet pressure pu = 80 mbar Outlet pressure pd = 60 mbarThe desired control ratio from high-fire to low-fire rate is RV = 101High fire ∆p = pu - pd = 20 mbar Point P1Low fire Point P2 Qmin = 26 m3h at ∆p = 20 mbar RV = Qmax Qmin = 1151

Point P1 and point P2 must be within the working range of a unit size We recommend that you select the smallest size to achieve the best control properties

5 1 1 Calculate VAD

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 25

∆p [i

nch

WC]

Qn [SCFH]100 400 600 4000 60001000 200020 30 40 50 200 3006015 80

1

08

1

2

3

4

56

8

10

20

30

40

5060

80

100

200

∆p [m

bar]

5

8

3

20

10

30

40

80

60

300

400

50

04 06 1 2 3 4 5 808 10 20 30 402

03 60 100 200

100

200

500

1

3

2

04 06 08 1 2 3 4 5 6 8 10 20 30 40

04 06 08 1 2 3 4 5 6 8 10

200

80 10020 3003

03Qn [m3h]

02

50 60 80 100

40 50 60

= pd min lt 5 mbar

VAG

VxH

VAV

115

BVA

GV

xHV

AV 12

0A

VAG

VxH

VAV

125

A

P1

P2

VAG

VxH

VAV

240

AVA

GV

xHV

AV 3

50A

= natural gas (ρ = 080 kgm3) = propane (ρ = 201 kgm3) = air (ρ = 129 kgm3)

The characteristic flow rate curves have been meas-ured with the specified flanges and a fitted strainer If two or more valves are combined the pressure loss of each additional valve drops by approx 5

5 2 Selection example for VAG VAH VRH VAV Natural gas Flow rate Qmax = 30 m3h Inlet pressure pu = 80 mbar Outlet pressure pd max VAG = 60 mbarThe desired control ratio from high-fire to low-fire rate is RV = 101High fire ∆p = pu - pd max = 20 mbar Point P1Low fire pd min = pd max RV2 = 06 mbar Qmin = Qmax RV = 3 m3h ∆p = pu - pd min = 794 mbar Point P2 select VAG 120APoint P1 and point P2 must be within the working range of a unit size We recommend that you select the smallest size to achieve the best control properties

metric imperial

Enter densityFlow rate Qn

Inlet pressure pu

Outlet pressure pd

Product RV v

5 2 1 Calculate VAG VxH VAV

Pressure loss ∆p

∆pmin

Flow rate

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 26

∆p [i

nch

WC]

Qn [SCFH]100 400 600 4000 60001000 200020 30 40 50 200 3006015 80

1

08

1

2

3

4

56

8

10

20

30

40

5060

80

100

200

∆p [m

bar]

5

8

3

20

10

30

40

80

60

300

400

50

04 06 2 3 4 5 808 10 20 30 402

03 60 100 200

100

200

500

1

3

2

04 06 08 1 2 3 4 5 6 8 10 20 30 40

04 06 08 1 2 3 4 5 6 8 10

200

80 10020 3003

03Qn [m3h]

02

50 60 80 100

40 50 60

VAG

115

N

P1VAG

125

N

VAG

120

N

VAG

240

NP2

VAG

350

N

= natural gas (ρ = 080 kgm3) = propane (ρ = 201 kgm3) = air (ρ = 129 kgm3)

The characteristic flow rate curves have been meas-ured with the specified flanges and a fitted strainer If two or more valves are combined the pressure loss of each additional valve drops by approx 5

5 3 Selection example for zero governor VAG NNatural gas Flow rate Qmax = 30 m3h Inlet pressure pu = 20 mbar Outlet pressure pd = 0 mbar (atmospheric pressure)The desired control ratio from high-fire to low-fire rate is RV = 101High fire ∆p = pu - pd max = 20 mbar Point P1Low fire Point P2 Qmin = 24 m3h at ∆p = 20 mbar RV = Qmax Qmin = 1231Point P1 and point P2 must be within the working range of a unit size We recommend that you select the smallest size to achieve the best control properties

metric imperial

Enter densityFlow rate Qn

Inlet pressure pu

Outlet pressure pd

Product RV

5 3 1 Calculate VAG N

Pressure loss ∆p

∆pmin

Flow rate

v

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 27

6 Selection6 1 Selection table for pressure regulator with solenoid valve VAD

Accessories right Accessories left

Type1) T R N F N K P Q Y W S2) G2) R2) L2) M20

cab

le g

land

Plug

with

soc

ket

Plug

with

out s

ocke

t

-25-50 -100 A B Scre

w p

lug

Pres

sure

test

poi

nt

DG

17V

C 3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

Scre

w p

lug

Pres

sure

test

poi

nt

DG

17V

C 3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

VAD 115

VAD 120

VAD 125

VAD 240

VAD 350

= standard = available1) The following nominal inlet fl ange diameters are also available size 1 with nominal diameter DN 10 size 2 with nominal diameters DN 25 DN 32 and DN 50 size 3 with nominal diameters DN 40 and DN 652) Position indicator and bypasspilot gas valve cannot be fi tted together on the same side3) Specify the test point for inlet pressure pu or outlet pressure pdHelp for selecting the pressure regulator VAD can be found on the ProFi DVD wwwkromschroedercom Products DVD Product fi nder ldquoProFirdquo

Order exampleVAD 240RNW-100A

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 28

Selection

6 2 Type code for VADCode DescriptionVAD Pressure regulator with solenoid valve1 ndash 3 SizeT T-product10 ndash 65 Nominal inlet and outlet diameterRNF

Rp internal threadNPT internal thread

ISO fl angeN Quick opening quick closingKPQYW

Mains voltage 24 V DCMains voltage 100 V AC 5060 HzMains voltage 120 V AC 5060 HzMains voltage 200 V AC 5060 HzMains voltage 230 V AC 5060 Hz

SG

Position indicator with visual indicatorPosition indicator for 24 V with visual indicator

RL

Viewed from the right (in the direction of fl ow)Viewed from the left (in the direction of fl ow)

-25-50-100

Outlet pressure pd 25 ndash 25 mbar20 ndash 50 mbar

35 ndash 100 mbarAB

Standard valve seatReduced valve seat

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 29

Selection

6 3 Selection table for airgas ratio control with solenoid valve VAG flow rate regulators VAH VRH

Type1) T R N F N K P Q Y W S2) G2) R2) L2) M20

cab

le g

land

Plug

with

soc

ket

Plug

with

out s

ocke

t

A B E K A N Scre

w p

lug

Pres

sure

test

poi

ntD

G 1

7VC

3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

Scre

w p

lug

Pres

sure

test

poi

ntD

G 1

7VC

3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

VAG 115 VAG 120 VAG 125 VAG 240 VAG 350

VAH 115 VAH 120 VAH 125 VAH 240 VAH 350

VRH 115 VRH 120 VRH 125 VRH 240 VRH 350

= standard = available1) The following nominal inlet fl ange diameters are also available size 1 with nominal diameter DN 10 size 2 with nominal di-

ameters DN 25 DN 32 and DN 50 size 3 with nominal diameters DN 40 and DN 652) Position indicator and bypasspilot gas valve cannot be fi tted together on the same side3) Specify the test point for inlet pressure pu or outlet pressure pdHelp for selecting the regulators can be found on the ProFi DVD wwwkromschroedercom Products DVD Product fi nder ldquoProFirdquo

Order exampleVAG 240RNWAE

Accessories right Accessories left

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 30

Selection

6 4 Type code for VAG VAH VRHCode DescriptionVAGVAHVRH

Airgas ratio control with solenoid valveFlow rate regulator with solenoid valve

Flow rate regulator1 ndash 3 SizeT T-product15 ndash 50 Nominal inlet and outlet diameterRNF

Rp internal threadNPT internal thread

ISO fl angeN1) Quick opening quick closingK1)

P1)

Q1)

Y1)

W1)

Mains voltage 24 V DCMains voltage 100 V AC 5060 HzMains voltage 120 V AC 5060 HzMains voltage 200 V AC 5060 HzMains voltage 230 V AC 5060 Hz

S1)

G1)Position indicator with visual indicator

Position indicator for 24 V with visual indicatorRL

Viewed from the right (in the direction of fl ow)Viewed from the left (in the direction of fl ow)

AB

Standard valve seatReduced valve seat

EKAN

Connection kit for air control pressure psaVAG VAH VRH compression fi tting

VAG plastic hose couplingVAG VAH VRH NPT 18 adapter

VAG zero governor1) Only available for VAG VAV VAH

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 31

6 5 Selection table for variable airgas ratio control with solenoid valve VAVAccessories right Accessories left

Type1) T R N F N K P Q Y W S2) G2) R2) L2) M20

cab

le g

land

Plug

with

soc

ket

Plug

with

out s

ocke

t

A B E K A Scre

w p

lug

Pres

sure

test

poi

ntD

G 1

7VC

3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

Scre

w p

lug

Pres

sure

test

poi

ntD

G 1

7VC

3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

VAV 115

VAV 120

VAV 125

VAV 240

VAV 350

= standard = available1) The following nominal inlet fl ange diameters are also available size 1 with nominal diameter DN 10 size 2 with nominal diameters DN 25 DN 32 and DN 50 size 3 with nominal diameters DN 40 and DN 652) Position indicator and bypasspilot gas valve cannot be fi tted together on the same side3) Specify the test point for inlet pressure pu or outlet pressure pdHelp for selecting the variable airgas ratio control VAV can be found on the ProFi DVD wwwkromschroedercom

Products DVD Product fi nder ldquoProFirdquo

Order exampleVAV 240RNWAK

Selection

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 32

Selection

6 6 Type code for VAVCode DescriptionVAV Variable airgas ratio control with solenoid valve1 ndash 3 SizeT T-product15 ndash 50 Nominal inlet and outlet diameterRNF

Rp internal threadNPT internal thread

ISO fl angeN Quick opening quick closingKPQYW

Mains voltage 24 V DCMains voltage 100 V AC 5060 HzMains voltage 120 V AC 5060 HzMains voltage 200 V AC 5060 HzMains voltage 230 V AC 5060 Hz

SG

Position indicator with visual indicatorPosition indicator for 24 V with visual indicator

RL

Viewed from the right (in the direction of fl ow)Viewed from the left (in the direction of fl ow)

AB

Standard valve seatReduced valve seat

EKA

Connection kit for air control pressure psa and combus-tion chamber control pressure psc

compression fi ttingplastic hose coupling

NPT 18 adapter

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 33

Selection

6 7 AccessoriesModularly configurable withndash Screw plugsndash Pressure test pointsndash Pressure switch DGVC for inlet

andor outlet pressurendash Tightness control TCndash Bypasspilot gas valve VBY 8 for

size 1ndash Bypasspilot gas valve VAS 1For further information see page 37 (Accessories)

Position indicator

Plug with socket

Plug

Screwplugs

Pressuretest points

Pressure switch DGC Tightness

control TC

Bypasspilot gas valve VBY 8 for size 1

Bypasspilot gas valve VAS 1

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 34

7 Project planning informationDo not store or install the unit in the open airThe inlet pressure pu and the outlet pressure pd can be meas-ured on both sides of the valve body To increase the control accuracy an external impulse line can be connected instead of the pressure test point pd

VAD

pu

pd

(psa)

VAGpd

pu

psa

psa

VAD measurement point for the gas outlet pressure pd on the regulator body A combustion chamber control line (psc) can be connected to connection psa for maintaining a constant burner capacityVAG additional measurement point for the air control pressure psa on the regulator body

VAV

psapsc

pu

pd

VAH VRH

pu

pd-

pdpsa-

psa

VAV measurement point for the outlet pressure pd on the regulator bodyVAH additional measurement points for the outlet pressure pd- and the air control pressure psapsa- on the regulator body

7 1 Installation

GFK

VAGVAH

GFKVAD

Sealing material and thread cuttings must not be allowed to get into the valve housing Install a filter upstream of every system

gt20 mmgt0 79

The unit must not be in contact with masonry Minimum clear-ance 20 mm (079 inches)Ensure that there is sufficient space for installation and ad-justment

le +100 degCle +212 degF

The solenoid body heats up during operation ndash depending on ambient temperature (max 60degC140degF) and intrinsic heating (approx 40degC104degF)

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 35

In the case of double solenoid valves the position of the con-nection box can only be changed by removing the actuator and reinstalling it offset by 90deg or 180deg

If more than three valVario controls are installed in line the controls must be supported

The seals in some gas compression fittings are approved for temperatures of up to 70degC (158degF) This temperature limit will not be exceeded if the flow through the pipe is at least 1 msup3h (3531 SCFH) of gas and the maximum ambient temperature is 50degC (122degF)

7 1 1 Installation position

pu ge 80 mbar(80 hPa32 WC)

VAD VAG VAH VRH VAV

In humid environments black solenoid actuator in the vertical upright position only

VAD VAG VAH VRH black solenoid actuator in the vertical upright position or tilted up to the horizontal not upside downVAG VAH horizontal position only if pu ge 80 mbar (32 WC))VAV installation in the vertical position only black solenoid actuator in the vertical upright positionTo ensure that the airgas ratio control VAG the flow rate regulator VAH VRH or the variable airgas ratio control VAV can react quickly when the load is changed the impulse line for the air control pressure psa and for VAV the impulse line for the combustion chamber control pressure psc should be kept as short as possible The tube internal diameter for the impulse line must always be ge 39 mm (015)

VAH VRHIt is not permitted to install a gas solenoid valve VAS down-stream of flow rate regulator VAH VRH and upstream of fine-adjusting valve VMV The VAS would no longer be able to perform its function as a second safety valve if installed in the above-mentioned position

M

VMV

VAH

VASVAS

pd-

psa-psa

VMV

VAH pd-

psa-psa

The measuring orifice in the air line for impulse lines psa and psa- must always be installed downstream of the air control valve

Project planning information gt Installation

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 36

VAVThe impulse line for the combustion chamber control pres-sure psc must be fitted so that no condensation can enter the pressure regulator but rather flows back into the combustion chamber

7 2 Setting the low-fire rate on VAG VAH VRH VAV

-10 +05-05

ndash

+1

-15

mbar

+15

06

1 152

3

N V

+ +ndash

+30 -15+15

ndash

-3

+5

mbar

-5

N

+

VAG VAH VRH VAV

If the burner operates at low-fire rate the gasair mixture can be changed using the parallel shift of the characteristic curve by turning the adjusting screw ldquoNrdquoAdjusting range at low fire VAG VAH VRH -5 to +5 mbar (-195 to +195 WC) VAV -15 to +15 mbar (-06 to +06 WC)

7 3 Setting the high-fire rate on VAVTo set the high-fire rate the transmission ratio is changed us-ing the adjusting screw ldquoVrdquo until the required flue gas values are achievedTransmission ratio V = pdpsa = 061 to 31The settings N and V can influence each other and must be repeated if necessary

+N+V

-V

-N

VAV

psa [mbar]

p d [m

bar]

7 3 1 CalculationWith no connection to the combustion chamber control pres-sure psc pd = V times psa + NWith connection to the combustion chamber control pressure psc (pd - psc) = V times (psa - psc) + N

Project planning information

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 37

pu pd

21579

4836

085310

189

142

8 Accessories8 1 Gas pressure switch DG VC for VAx VRHType Adjusting range [mbar]DG 17VC 2 to 17DG 40VC 5 to 40DG 110VC 30 to 110DG 300VC 100 to 300

Scope of delivery 1 times pressure switch for gas 2 times retaining screws 2 times sealing rings

8 2 Gas pressure switch DG VCT for VAx T VRH TType Adjusting range [WC]DG 17VCT 08 to 68DG 40VCT 2 to 16DG 110VCT 12 to 44DG 300VCT 40 to 120

Scope of delivery 1 times gas pressure switch with AWG 18 connection wires 2 times retaining screws 2 times sealing ringsMonitoring the inlet pressure pu the electrical plug of the pressure switch for gas points towards the inlet flangeMonitoring the outlet pressure pd the electrical plug of the pressure switch for gas points towards the outlet flange

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 38

A BC

D

FE

ACD

F

B

E

8 3 Bypass valvepilot gas valve VAS 18 3 1 VAS 1 attached to VADVAGVAHVAV 1Scope of delivery A 1 times bypasspilot gas valve VAS 1 B 4 times O-rings C 4 times double nuts D 4 times connection parts E 1 times mounting aidBypass valve VAS 1 F 2 times connection pipes if the bypass valve has a blind flange

at the outlet sidePilot gas valve VAS 1 F 1 times connection pipe 1 times sealing plug if the pilot gas valve

has a threaded flange at the outlet side

Accessories

8 3 2 VAS 1 attached to VADVAGVAHVAV 2 VADVAGVAHVAV 3Scope of delivery A 1 times bypasspilot gas valve VAS 1 B 4 times O-rings C 4 times spacer sleeves D 4 times connection parts E 1 times mounting aidBypass valve VAS 1 F 2 times connection pipes if the bypass valve has a blind flange

at the outlet sidePilot gas valve VAS 1 F 1 times connection pipe 1 times sealing plug if the pilot gas valve

has a threaded flange at the outlet side

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 39

2

3

456

810

20

30

405060

80100

∆p [m

bar]

005 01 02 03 05 08 1 2 3 4 51

3

2

Qn [m3h]

1

01

02

03

0405

08

003

002

6 8 10

005 01 02 03 05 08 1 2 3 4 5003 6 8 10

20

005 01 02 03 05 08 1 2 3 4 5003 6 8 10 20

30

∆p [i

nch

WC]

1

2

3

456

810

20

30

40

04

004

006

00801

02

03

0506

08

Qn [SCFH]10 40 60 100 200 3001 500 10002 3 4 5

120 306 8

21 3 4 5 6 7 8 910

8 3 3 Flow rate

The characteristic flow rate curves have been measured for bypass valve VAS 1 with connection pipe diameter 1 to 10 mm (004 to 04) and for the pilot gas valve with 10 mm (04) connection pipe

Bypass valve connection pipe diameter [mm]

Pilo

t gas

val

ve 1

0 m

m (0

4)

conn

ectio

n pi

pe d

iam

eter

Accessories gt Bypass valvepilot gas valve VAS 1

= natural gas (ρ = 080 kgm3) = propane (ρ = 201 kgm3) = air (ρ = 129 kgm3)

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 40

Accessories

8 4 Bypass valvepilot gas valve VBY 8 for VADVAGVAHVAV 1

B

C

AVBY 8

VAx 1

55

(217)40(157)

70 (276)

80(315)

Rp frac14(pilot gas valve)

For mounting on VAD VAG VAH VAV 1 and double solenoid valve VCD VCG VCH VCV 1

8 4 1 Scope of delivery VBY 8I as bypass valveA 1 times bypass valve VBY 8IB 2 times retaining screws with 4 times O-rings both retaining screws

have a bypass orificeC 1 times grease for o-rings

8 4 2 Scope of delivery VBY 8R as pilot gas valveA 1 times pilot gas valve VBY 8RB 2 times retaining screws with 5 x O-rings one retaining screw

has a bypass orifice (2 x O-rings) the other does not (3 x O-rings)

C 1 times grease for O-rings

8 4 3 SelectionType I R W Q K 6L -R -L E B D 05

VBY 8

Order exampleVBY 8RW6L-LED

8 4 4 Type codeCode DescriptionVBY Gas solenoid valve8 Nominal sizeIR

For internal gas pick-up as bypass valveFor external gas pick-up as pilot gas valve

KQW

Mains voltage 24 V DC Mains voltage 120 V AC 5060 HzMains voltage 230 V AC 5060 Hz

6L Electrical connection via plug and socket with LED-R-L

Attachment side of main valve right-hand sideAttachment side of main valve left-hand side

EB

Attached to the VAxEnclosed (separate packing unit)

05D

Nozzle diameter = 05 mm (002)Flow adjustment

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 41

2

01

02

03

05

081

3

456

810

20

30

405060

80100

∆p [m

bar]

1

3

201 02 03 05 1 2 3001 003 4

Qn [m3h]

02 03 05 1 2

01 02 05

002 006

002

002 006 1

0010006 005 01

001

0003

0006 2 3

VBY 8DVBY 805

∆p [i

nch

WC]

1

2

3

456

810

20

30

40

040506

08

1

Qn [SCFH]10 40 60 1005 2081 2 30402

01

02

03

004005006

008

Adjusting range

8 4 5 Flow rateVBY 8 D

+

-

The flow rate can be set by turning the flow rate restrictor (4 mm016 Allen screw) frac14 of a turn Flow rate 10 to 100

VBY 8 05The flow is routed through a 05 mm (002) nozzle and thus has a fixed characteristic flow rate curve Adjustment is not possible

8 4 6 Technical dataInlet pressure pu max 500 mbar (7 psig)Ambient temperature 0 to +60degC (32 to 140degF) no condensation permittedStorage temperature 0 to +40degC (32 to 104degF) no condensation permittedPower consumption 24 V = 8 W 120 V = 8 W 230 V = 95 WEnclosure IP 54

Accessories gt Bypass valvepilot gas valve VBY 8 for VADVAGVAHVAV 1

= natural gas (ρ = 080 kgm3) = propane (ρ = 201 kgm3) = air (ρ = 129 kgm3)

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 42

TC 116VB C

56(22)

49(193)

27(106)

A

A

VCx 1 VCx 2VCx 3

8 5 Tightness control TC 116Vfor VAx 1 ndash 3An adapter plate is required to attach the tightness control to the right- or left-hand side of the pressure regulator with gas solenoid valveScope of delivery A 1 times adapter plate B 2 times O-rings C 2 times retaining screwsFor attachment to left-hand side Order No 74922391 right-hand side Order No 74921995

8 6 Pressure test pointsTest points to check the inlet pressure pu and outlet pressure pdScope of delivery 1 x pressure test points with 1 x profiled sealing rings Order No 74923390

8 7 Cable gland setWhen wiring a double solenoid valve with pressure regula-tor VCx the connection boxes are to be connected using a cable gland setThe cable gland set can only be used if the connection boxes are at the same height and on the same side and if both valves are equipped either with or without a proof of closure switchVA 1 Order No 74921985 VA 2 Order No 74921986 VA 3 Order No 74921987

Accessories

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 43

A B

D

C

Accessories

8 9 Differential pressure orifice

Size PipeDN

Differential pressure orifi cewith outlet dia

1 15 17 mm 0671 20 25 mm 0981 25 30 mm 1182 40 46 mm 1813 50 58 mm 228

If pressure regulator VADVAGVAV 1 is retrofitted upstream of gas solenoid valve VAS 1 a DN 25 differential pressure orifice with outlet opening d = 30 mm (118) must be inserted at the outlet of the pressure regulatorIn the case of pressure regulator VAx 115 or VAx 120 the DN 25 differential pressure orifice must be ordered separately and retrofitted Order No 74922240

8 8 Seal set VA 1 ndash 3VA 1 Order No 74921988 VA 2 Order No 74921989 VA 3 Order No 74921990Scope of deliveryA 1 times double block seal B 2 times O-rings (flange) C 2 times O-rings (pressure switch) for pressure test pointscrew plug D 2 times sealing rings (flat sealing) and 2 times profiled sealing rings

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 44

BA

C

pd-

8 11 Attachment blockFor locked installation of pressure gauge and other acces-soriesScope of delivery A 1 times attachment block B 2 times self-tapping screws for installation C 2 times O-rings

Accessories

8 10 Retaining frameIn the event that a pressure regulator VAx is installed at a later point upstream of a gas solenoid valve VAS a measur-ing orifice VMO or a fine-adjusting valve VMV the retaining frame must be fitted at the inlet of the second device in order to fasten the differential pressure orifice at the regulator outlet Order the retaining frame separatelyRetaining frame for Size 1 Order No 74923029 Size 2 Order No 74923030 Size 3 Order No 74923031

8 12 Gas control lineFine-adjusting valve VMV can be installed on the flow rate regulator VAH for fine adjustment of the gas flow rateThe gas control line for gas outlet pressure pd- is available with 2 18 compression fittingsSize 1 Order No 74924458 Size 2 Order No 74924459

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 45

8 13 Measuring orifice VMOThe measuring orifice VMO is designed to reduce the gas and air flow rates and is installed downstream of the valVario control The measuring orifice is available with Rp internal thread (NPT internal thread) or flange to ISO 7005See wwwdocuthekcom Elster Kromschroumlder Krom-schroumlder LBE Products 03 Valves and butterfly valves valVario accessories Type of document Technical Informa-tion VMO

Accessories

8 14 Filter module VMFUsing the filter module VMF the gas flow upstream of the gas solenoid valve VAS and the airgas ratio control is cleaned The filter module is available with Rp internal thread (NPT internal thread) or flange to ISO 7005 and can also be supplied with fitted pressure switch as an optionSee wwwdocuthekcom Elster Kromschroumlder Krom-schroumlder LBE Products 03 Valves and butterfly valves valVario accessories Type of document Technical Informa-tion VMF

8 15 Fine-adjusting valve VMVThe flow rate is set using the fine-adjusting valve VMV The fine-adjusting valve is available with Rp internal thread (NPT internal thread) or flange to ISO 7005See wwwdocuthekcom Elster Kromschroumlder Krom-schroumlder LBE Products 03 Valves and butterfly valves valVario accessories Type of document Technical Infor-mation VMV

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 46

9 Technical dataGas types natural gas LPG (gaseous) biologically produced methane (max 01 -by-vol H2S) or clean air other gases on request The gas must be clean and dry in all temperature conditions and must not contain condensateCE and FM approved UL listed max inlet pressure pu 10 ndash 500 mbar (4 ndash 200 WC) FM approved (230 V AC 120 V AC 24 V DC) non opera-tional pressure 700 mbar (10 psig)ANSICSA approved (230 V AC 120 V AC 24 V DC) up to 350 mbar (5 psig)Opening time of the solenoid valve quick opening le 05 s Closing time quick closing lt 1 sMedium and ambient temperatures -20 to +60degC (-4 to +140degF) no condensation permittedStorage temperature -20 to +40degC (-4 to +104degF)Enclosure IP 65Valve housing aluminium valve seal NBRConnection flanges with internal thread Rp to ISO 7-1 NPT to ANSIASMESafety valve Class A to EN 161 Factory Mutual Research Class 7400 Process Control Valves (230 V AC 120 V AC 24 V DC) ANSI Z2121 and CSA 65 ANSI Z2118 and CSA 63Control class A to EN 88-1Control range up to 101

Mains voltage 230 V AC +10-15 5060 Hz 200 V AC +10-15 5060 Hz 120 V AC +10-15 5060 Hz 100 V AC +10-15 5060 Hz 24 V DC plusmn20Duty cycle 100Power factor of the solenoid coil cos φ = 09Power consumption

Type Voltage Power

VAx 1

24 V DC 25 W ndash100 V AC 25 W (26 VA)120 V AC 25 W (26 VA)200 V AC 25 W (26 VA)230 V AC 25 W (26 VA)

VAx 2 VAx 3

24 V DC 36 W ndash100 V AC 36 W (40 VA)120 V AC 40 W (44 VA)200 V AC 40 W (44 VA)230 V AC 40 W (44 VA)

VBY24 V DC 8 W ndash

120 V AC 8 W ndash230 V AC 95 W ndash

Cable gland M20 times 15Electrical connection cable with max 25 mm2 (AWG 12) or plug with socket to EN 175301-803

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 47

Position indicator contact rating

Type Voltage Min current(resistive load)

Max current(resistive load)

VAxS VCxS 12 ndash 250 V AC 5060 Hz 100 mA 3 AVAxG VCxG 12 ndash 30 V DC 2 mA 01 A

Position indicator switching frequency max 5 times per minute

Switching current [A]

Switching cyclescos φ = 1 cos φ = 06

01 500000 50000005 300000 250000

1 200000 1000003 100000 ndash

Limited to max 200000 cycles for heating systems

9 1 VADOutlet pressure pd VAD-25 25 ndash 25 mbar (1 ndash 10 WC) VAD-50 20 ndash 50 mbar (8 ndash 20 WC) VAD-100 35 ndash 100 mbar (14 ndash 40 WC)Combustion chamber control pressure psc (connection psa)

-20 to +20 mbar (-78 to +78 WC)

VAD

pu

pd

(psa)

9 2 VAGOutlet pressure pd 05 ndash 100 mbar (02 ndash 40 WC)Air control pressure psa 05 ndash 100 mbar (02 ndash 40 WC)

Adjusting range at low fire plusmn5 mbar (plusmn2 WC)Transmission ratio of gas to air 11The inlet pressure must always be higher than the air control pressure psa + pressure loss ∆p + 5 mbar (2 WC)

VAGpd

pu

psa

psa

VAGK 1 x 18 coupling for plastic hose (internal dia 39 mm (015) external dia 61 mm (024)) or VAGE 1 x 18 compression fitting for 6 times 1 tube or VAGA 1 x NPT 18 adapter or VAGN zero governor with breathing orifice

9 3 VAH VRHAir control pressure psa 06 ndash 100 mbar (024 ndash 40 WC) Differential air pressure ∆psa (psa - psa-) 06 ndash 50 mbar (024 ndash 197 WC) Differential gas pressure ∆pd (pd - pd-) 06 ndash 50 mbar (024 ndash 197 WC)Transmission ratio of gas to air 11The inlet pressure must always be higher than the differen-tial air pressure ∆psa + pressure loss ∆p + max gas pres-sure on burner + 5 mbar (2 WC)Adjusting range at low fire plusmn5 mbar (plusmn2 WC)

Technical data

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 48

VAHVRH

pd-

pu

psa-

psa

Connection of the air control pressure psaVAHE VRHE 3 x 18 compression fitting for 6 times 1 tube or VAHA VRHA 3 x NPT 18 adapter

9 4 VAVOutlet pressure pd 05 ndash 30 mbar (02 ndash 117 WC)Air control pressure psa 04 ndash 30 mbar (015 ndash 117 WC)Combustion chamber control pressure psc

-20 to +20 mbar (-78 to +78 WC)Min control pressure differential psa - psc 04 mbar (015 WC)Min pressure differential pd - psc 05 mbar (02 WC)Adjusting range at low fire plusmn15 mbar (plusmn06 WC)Transmission ratio of gas to air 061 to 31The inlet pressure pu must always be higher than the air control pressure psa times transmission ratio V + pressure loss ∆p + 15 mbar (06 WC)

pu

pd psapsc

VAV

VAVK 2 x plastic hose couplings (internal dia 39 mm (015) external dia 61 mm (024)) or VAVE 2 x 18 compression fitting for 6 times 1 tube or VAVA 2 x NPT 18 adapter

Technical data

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 49

9 5 Safety-specific characteristic values for VAx 1 ndash 3For SILSuitable for Safety Integrity Level SIL 1 2 3

Diagnostic coverage DC 0

Type of subsystem Type A to EN 61508-2 74312

Operating mode High demand mode pursu-ant to EN 61508-4 3512

For PLSuitable for Performance Level PL a b c d e

Category B 1 2 3 4Common cause failure CCF gt 65Application of essential safety requirements Satisfied

Application of tried-and-tested safety requirements Satisfied

For SIL and PL

B10d value

Operating cyclesVAD VAG VAV VAH 1 10094360VAD VAG VAV VAH 2 8229021VAD VAG VAV VAH 3 6363683

Hardware fault tolerance (1 valve) HFT 0

Hardware fault tolerance (2 valves) HFT 1

Safe failure fraction SFF gt 90Fraction of undetected com-mon cause failures β ge 2

Max service life under operating conditions10 years after date of production plus max 12 year in stor-age prior to first use or once the given number of operating cycles has been reached depending on which is achieved firstThe devices are suitable for single-channel systems (HFT = 0) up to SIL 2PL d and up to SIL 3PL e when two re-dundant valves are installed in a double-channel architecture (HFT = 1) provided that the complete system complies with the requirements of EN 61508ISO 13849

For a glossary of terms see page 53 (Glossary)

Technical data

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 50

nop 1hnop 1a

sB10d

T10d aPFHD (1 VAx) 1h

PFHD (2 VAx) 1h

PFDavg (1 VAx)

PFDavg (2 VAx)

Technical data gt Safety-specific characteristic values for VAx 1 ndash 3

9 5 1 Determining the PFHD value the λD value and the MTTFd value

PFHD = λD = x nop= 1MTTFd

01B10d

PFDavg = x λD x 24 x 365 x T10d 12

Type

Cycle time

suitable for

suitable for

PFHD = Probability of dangerous failure (HDM = high de-mand mode) [1hour]PFDavg = Average probability of dangerous failure on de-mand (LDM = low demand mode)λD = Mean dangerous failure rate [1hour]MTTFd = Mean time to dangerous failure [hours]nop = Demand rate (mean number of annual operations) [1hour]

9 5 2 Calculating the PFHD and PFDavg

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 51

VAD VAG VAH VAV

H1

Rp frac14(NPT frac14)

H2

E

LF

F

H4

H3

B

VAxS VAxF

L2G

G

Technical data

9 6 Dimensions

Type

Connec-tion Dimensions

WeightRpNPT DN

L L2 E F G H1 H2 H3 H4 Bmm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch kg lbs

VAx 115 12 15 75 29 ndash ndash 75 29 15 06 ndash ndash 143 56 82 32 161 63 117 46 97 38 18 40VAH 115 12 15 75 29 ndash ndash 75 29 15 06 ndash ndash 143 56 100 39 161 63 135 53 97 38 2 44VAx 120 34 20 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 82 33 161 63 117 46 97 38 19 42VAH 120 34 20 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 100 39 161 63 135 53 97 38 21 46VAx 125 1 25 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 82 33 161 63 117 46 97 38 19 42VAH 125 1 25 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 100 39 161 63 135 53 97 38 21 46VAx 240 112 40 128 50 200 79 85 33 29 11 66 26 170 67 112 44 191 75 162 64 125 49 44 97VAH 240 112 40 128 50 200 79 85 33 29 11 66 26 170 67 132 52 191 75 182 72 125 49 47 104VAx 350 2 50 155 61 230 91 85 33 36 14 74 29 180 70 135 53 201 79 196 77 160 63 61 134VAH 350 2 50 155 61 230 91 85 33 36 14 74 29 180 70 156 61 201 79 217 85 160 63 64 141

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 52

10 Converting unitssee wwwadlatusorg

11 Maintenance cyclesAt least once per annum at least twice per annum for biologi-cally produced methaneIf the flow rate drops clean the strainer

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 53

12 Glossary12 1 Diagnostic coverage DCMeasure of the effectiveness of diagnostics which may be determined as the ratio between the failure rate of detected dangerous failures and the failure rate of total dangerous failuresNOTE Diagnostic coverage can exist for the whole or parts of a safety-related system For example diagnostic cover-age could exist for sensors andor logic system andor final elements Unit see EN ISO 13849-12008

12 2 Mode of operationHigh demand mode or continuous modeOperating mode where the frequency of demands for opera-tion made on a safety-related system is greater than one per year or greater than twice the proof-test frequencysee EN 61508-42008

12 3 CategoryClassification of the safety-related parts of a control system in respect of their resistance to faults and their subsequent behaviour in the fault condition and which is achieved by the structural arrangement of the parts fault detection andor by their reliability see EN ISO 13849-12008

12 4 Common cause failure CCFFailures of different items resulting from a single event where these failures are not consequences of each othersee EN ISO 13849-12008

12 5 Fraction of undetected common cause failures β Fraction of undetected failures of redundant components due to a single event whereby these failures are not based on mutual causesNOTE β is expressed as a fraction in the equations and as a percentage elsewheresee EN 61508-62010

12 6 B10d valueMean number of cycles until 10 of the components fail dan-gerouslysee EN ISO 13849-12008

12 7 T10d valueMean time until 10 of the components fail dangerouslysee EN ISO 13849-12008

12 8 Hardware fault tolerance HFTA hardware fault tolerance of N means that N + 1 is the mini-mum number of faults that could cause a loss of the safety functionsee IEC 61508-22010

12 9 Mean dangerous failure rate λD Mean rate of dangerous failures during operation time (T10d) Unit 1hsee EN ISO 13849-12008

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 54

12 10 Safe failure fraction SFFFraction of safe failures related to all failures which are as-sumed to appearsee EN 13611A22011

12 11 Probability of dangerous failure PFHD Value describing the likelihood of dangerous failure per hour of a component for high demand mode or continuous mode Unit 1hsee EN 13611A22011

12 12 Mean time to dangerous failure MTTFd Expectation of the mean time to dangerous failuresee EN ISO 13849-12008

12 13 Demand rate nop Mean number of annual operationssee EN ISO 13849-12008

12 14 Average probability of dangerous failure on demand PFDavg (LDM = 1 ndash 10 switching cyclesyear)Average probability of a dangerous failure of the safety function on demand (LDM = low demand mode)see EN 61508-6

Glossary

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415

Finally we are offering you the opportunity to assess this ldquoTechnical Information (TI)rdquo and to give us your opinion so that we can improve our documents further and suit them to your needs

ClarityFound information quicklySearched for a long timeDidnrsquot find informationWhat is missing

ComprehensionCoherentToo complicatedNo answer

ScopeToo littleSufficientToo wideNo answer

No answer

NavigationI can find my way aroundI got ldquolostrdquoNo answer

UseTo get to know the productTo choose a productPlanningTo look for information

My scope of functionsTechnical departmentSalesNo answer

Remarks

(Adobe Reader 7 or higher required) wwwadobecom

Elster GmbH Postfach 2809 middot 49018 Osnabruumlck Strotheweg 1 middot 49504 Lotte (Buumlren) GermanyT +49 541 1214-0 F +49 541 1214-370 infokromschroedercomwwwkromschroedercom

The current addresses of our international agents are available on the Internetwwwkromschroederdeindexphpid=718ampL=1

We reserve the right to make technical modifications in the interests of progressCopyright copy 2015 Elster GmbH All rights reserved

Contact

Feedback

0325

0530

  • Pressure regulators with solenoid valve VAD VAG VAV VAH
  • Flow rate regulator VRH
  • Pressure regulators with double solenoid valve VCD VCG VCV VCH
  • Contents
  • 1 Application
    • 11 Examples of application
      • 111 Constant pressure control
      • 112 Constant pressure control with two gas solenoid valves
      • 113 Constant pressure control with max pressure switch
      • 114 Constant pressure control with non-controlled pilot gas outlet
      • 115 Modulating control
      • 116 Modulating control with two gas solenoid valves
      • 117 Modulating control with two gas solenoid valves and inlet pressure switch
      • 118 HighLow control
      • 119 Zero pressure control
      • 1110 Staged flow rate control
      • 1111 Continuous or staged flow rate control
      • 1112 Modulating control with variable airgas ratio control with gas solenoid valve
      • 1113 Modulating control in residential heat generation
          • 2 Certification
          • 3 Function
            • 31 VAD VAG VAH VRH VAV
              • 311 Pressure regulator for gas VAD
              • 312 Airgas ratio control VAG
              • 313 Flow rate regulators VAH VRH
              • 314 Variable airgas ratio control VAV
              • 315 Pressure regulator with gas solenoid valve VAxS position indicator with visual indicator
                • 32 Animation
                • 33 Connection diagram
                  • 331 VAx with M20 cable gland
                  • 332 VAx with plug
                  • 333 VAS with VADVAGVAHVAV with M20 cable gland
                  • 334 VAS with VADVAGVAHVAV with plug
                      • 4 Replacement possibilities for MODULINE pressure regulators with gas solenoid valve
                        • 41 GVS GVI GVIB GVR and GVRH are to be replaced by VAD VAG VAG+VAS VAH and VAV
                          • 5 Flow rate
                            • 51 Selection example for VAD
                              • 511 Calculate VAD
                                • 52 Selection example for VAG VAH VRH VAV
                                  • 521 CalculateVAG VxHVAV
                                    • 53 Selection example for zero governor VAGN
                                      • 531 Calculate VAGN
                                          • 6 Selection
                                            • 61 Selection table for pressure regulator with solenoid valve VAD
                                            • 62 Type code for VAD
                                            • 63 Selection table for airgas ratio control with solenoid valve VAG flow rate regulators VAH VRH
                                            • 64 Type code for VAG VAH VRH
                                            • 65 Selection table for variable airgas ratio control with solenoid valve VAV
                                            • 66 Type code for VAV
                                            • 67 Accessories
                                              • 7 Project planning information
                                                • 71 Installation
                                                  • 711 Installation position
                                                    • 72 Setting the low-fire rate on VAG VAH VRH VAV
                                                    • 73 Setting the high-fire rate on VAV
                                                      • 731 Calculation
                                                          • 8 Accessories
                                                            • 81 Gas pressure switch DGVC for VAx VRH
                                                            • 82 Gas pressure switch DGVCT for VAxT VRHT
                                                            • 83 Bypass valvepilot gas valve VAS 1
                                                              • 831 VAS 1 attached to VADVAGVAHVAV 1
                                                              • 832 VAS 1 attached to VADVAGVAHVAV 2 VADVAGVAHVAV 3
                                                              • 833 Flow rate
                                                                • 84 Bypass valvepilot gas valve VBY 8 for VADVAGVAHVAV 1
                                                                  • 841 Scope of delivery VBY 8I as bypass valve
                                                                  • 842 Scope of delivery VBY 8R as pilot gas valve
                                                                  • 843 Selection
                                                                  • 844 Type code
                                                                  • 845 Flow rate
                                                                  • 846 Technical data
                                                                    • 85 Tightness control TC 116V
                                                                    • 86 Pressure test points
                                                                    • 87 Cable gland set
                                                                    • 88 Seal set VA 1thinspndashthinsp3
                                                                    • 89 Differential pressure orifice
                                                                    • 810 Retaining frame
                                                                    • 811 Attachment block
                                                                    • 812 Gas control line
                                                                    • 813 Measuring orifice VMO
                                                                    • 814 Filter module VMF
                                                                    • 815 Fine-adjusting valve VMV
                                                                      • 9 Technical data
                                                                        • 91 VAD
                                                                        • 92 VAG
                                                                        • 93 VAH VRH
                                                                        • 94 VAV
                                                                        • 95 Safety-specific characteristic values for VAx 1thinspndashthinsp3
                                                                          • 951 Determining the PFHD value the λD value and the MTTFd value
                                                                          • 952 Calculating the PFHD and PFDavg
                                                                            • 96 Dimensions
                                                                              • 10 Converting units
                                                                              • 11 Maintenance cycles
                                                                              • 12 Glossary
                                                                                • 121 Diagnostic coverage DC
                                                                                • 122 Mode of operation
                                                                                • 123 Category
                                                                                • 124 Common cause failure CCF
                                                                                • 125 Fraction of undetected common cause failures β
                                                                                • 126 B10d value
                                                                                • 127 T10d value
                                                                                • 128 Hardware fault tolerance HFT
                                                                                • 129 Mean dangerous failure rate λD
                                                                                • 1210 Safe failure fraction SFF
                                                                                • 1211 Probability of dangerous failure PFHD
                                                                                • 1212 Mean time to dangerous failure MTTFd
                                                                                • 1213 Demand rate nop
                                                                                • 1214 Average probability of dangerous failure on demand PFDavg
                                                                                  • Feedback
                                                                                  • Contact
                                                                                      1. naechste_Seite 24
                                                                                      2. naechste Seite 18
                                                                                      3. naechste Seite 6
                                                                                      4. naechste Seite 16
                                                                                      5. naechste Seite 14
                                                                                      6. naechste Seite 25
                                                                                      7. naechste_Seite 11
                                                                                      8. naechste_Seite 17
                                                                                      9. fbArbeitspunkt_Min Ja
                                                                                      10. fbArbeitspunkt Ja
                                                                                      11. ftProgramm Standard-Programm
                                                                                      12. fz_kv
                                                                                      13. fz_pe 80
                                                                                      14. fz_pG 60
                                                                                      15. fzDelta_p_Soll 20
                                                                                      16. ftEinheit_Druck mbar
                                                                                      17. fatTyp [115]
                                                                                      18. fbArbeitspunkt_Min_2 Ja
                                                                                      19. fbArbeitspunkt_2 Ja
                                                                                      20. ftRegler_Typ VAG
                                                                                      21. ftProgramm_2 Standard-Programm
                                                                                      22. fz_kv_2
                                                                                      23. fatMedium [08]
                                                                                      24. fzDichte 08
                                                                                      25. ftEinheit_Dichte kgm3
                                                                                      26. fzV_Norm 30
                                                                                      27. ftEinheit_Volstrom m3h
                                                                                      28. fz_pe_2 80
                                                                                      29. fz_pG_2 60
                                                                                      30. fzDelta_p_Soll_2 20
                                                                                      31. ftEinheit_Druck2 [mbar]
                                                                                      32. ftEinheit_Geschw [ms]
                                                                                      33. fatTyp_2 [10954451150103322]
                                                                                      34. fbArbeitspunkt_Min_3 Ja
                                                                                      35. fbArbeitspunkt_3 Ja
                                                                                      36. ftProgramm_3 Standard-Programm
                                                                                      37. fz_kv_3
                                                                                      38. fz_pe_3 20
                                                                                      39. fz_pG_3 0
                                                                                      40. fzDelta_p_Soll_3 20
                                                                                      41. fatTyp_3 [123]
                                                                                      42. fatSchaltleistung [6363683]
                                                                                      43. fz_nop_Stunde 1
                                                                                      44. fz_nop_Jahr 8760
                                                                                      45. fzZyklus 3600
                                                                                      46. fzB10d 6363683
                                                                                      47. fzT10d 10
                                                                                      48. fzPFHd_1V 15714170551864384e-8
                                                                                      49. fzPFDavg_1V
                                                                                      50. ftGeeignet_1V PL d SIL 2
                                                                                      51. fzPFHd_2V 33505832253532625e-10
                                                                                      52. fzPFDavg_2V
                                                                                      53. ftGeeignet_2V PL e SIL 3
                                                                                      54. ftUebersicht Off
                                                                                      55. ftVerstaendlichkeit Off
                                                                                      56. ftFehlende_Info
                                                                                      57. ftUmfang Off
                                                                                      58. ftVerwendung_1 Off
                                                                                      59. ftVerwendung_2 Off
                                                                                      60. ftVerwendung_3 Off
                                                                                      61. ftVerwendung_4 Off
                                                                                      62. ftNavigation Off
                                                                                      63. ftTaetigkeitsbereich Off
                                                                                      64. ftBemerkung
                                                                                      65. Michael Rehkamp Elster Kromschroumlder>btnSenden
Page 10: VAD, VAG, VAV, VAH, VRH, VCD, VCG, VCV, VCH · PDF fileVAD, VAG, VAH, VAV, VRH, VCD, VCG, VCV, VCH · Edition 04.15 6 VAD VAD VAS 1 .1 Examples of application 1 .1 .1 Constant pressure

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 10

Venturi

DGCmin

PZL

M

IC + BVA

VASVAGN

1 1 9 Zero pressure controlIn this application the control air pres-sure is the atmospheric air pressure The air flow rate generates a negative pressure in the gas pipe via the Venturi This negative pressure is compensated by the airgas ratio control with gas solenoid valve VAGN The greater the negative pressure the greater the gas flow rate

Application gt Examples of application

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 11

BVHM + MB7L

VMV

ECOMAX

VASN

BCU BZA

Prozess SteuerungProcess Control (PCC)

AKT

psa-

psa

pd-

VAH

1 1 10 Staged flow rate controlThis application shows the VAH on a self recuperative burnerThe pressure loss in the recuperator de-pends on the furnace or kiln temperature When the furnace or kiln temperature is increased (at a constant air supply pres-sure) the flow rate drops This change in the air flow rate is measured by the orifice and the VAH changes the gas volume accordinglyThe air index (lambda) can be set using the fine-adjusting valve VMV

Application gt Examples of application

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 12

M

IC + BVA

VMV

VMO

VAH

VAS

psa-psa

pd-

psa

psc

DGCmin

PZL

psa

psc

M

IC + BVA

VAS VAV

1 1 11 Continuous or staged flow rate controlThis application shows flow rate control for a radiant tube burner system with plug-in recuperator for air preheatingThere are temperature-dependent air pressure losses in the recuperator The ratio of gas pressure to air pressure does not remain constant The fluctuating air flow rate is measured at the measuring orifice VMO and the VAH controls the gas flow rate proportionallyThe air index (lambda) can be set using the fine-adjusting valve VMV

Application gt Examples of application

1 1 12 Modulating control with variable airgas ratio control with gas solenoid valveThe ratio of gas pressure to air pressure can be adjusted infinitely between 061 and 31 Pressure fluctuations in the com-bustion chamber can be compensated via the combustion chamber control pressure psc see page 15 (Function)

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 13

DGCmin

PZL

psa

psc

VAS VAV

1 1 13 Modulating control in residential heat generationThis application shows the variable airgas ratio control with solenoid valve VAV fitted to a modulating-controlled forced draught burnerThe combustion air volume is set via a butterfly valve for air or by adjusting the fan speed

Application gt Examples of application

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 14

2 CertificationCertificates ndash see Docuthek

VAD VAG VAV VAH certified to SIL and PL

For systems up to SIL 3 pursuant to EN 61508 and PL e pursu-ant to ISO 13849

VAD VAG VAV VAHEU certified pursuant to

ndash Gas Appliances Directive (2009142EC) in conjunction with EN 13611 EN 161 EN 88-1 EN 126 and EN 1854

Meets the requirements of thendash Low Voltage Directive (200695EC)ndash EMC Directive (2004108EC)

VAD VAG VAV VAH FM approved

Factory Mutual Research Class 7400 Process Control Valves Designed for applications pursuant to NFPA 85 and NFPA 86 www approvalguide com

VAD VAG ANSICSA approved

American National Standards InstituteCanadian Standards Association ndash ANSI Z21 21CSA 6 5 ANSI Z21 18 and CSA 6 3

wwwcsagrouporg ndash Class number 3371-83 (natural gas LPG) 3371-03 (natural gas propane)

VAD VAG VAV UL listed

Underwriters Laboratories ndash UL 429 ldquoElectrically operated valvesrdquo wwwulcom Tools (at the bottom of the page) Online Certifications Directory

VAD VAG VAV AGA approved

AGA

Australian Gas Association Approval No 5319 httpwww aga asn auproduct_directory

Eurasian Customs Union

The product VAD VAG VAV VAH VCD VCG VCV VCH meets the technical specifications of the Eurasian Customs Union (the Russian Federation Belarus Kazakhstan)

Approval does not apply for 100 V AC and 200 V AC

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 15

3 Function3 1 VAD VAG VAH VRH VAVThe regulator is closed when it is disconnected from the power supplyOpening connect the system to the electrical power supply (alternating voltage will be rectified) The blue LED lights up The coilrsquos magnetic field pulls the armature upwards and clears the supply nozzle for the gas inlet pressure pu The gas passes through the internal impulse tube to the adjustment diaphragm and then pushes the valve disc open The outlet pressure is applied to the servo diaphragm via the internal feedback

The servo regulator then maintains a set constant outlet pres-sure pd

3 1 1 Pressure regulator for gas VADThe nominal outlet pressure pd is defined by the control spring

Servoregulator

Valve

Armature

Valve disc

Adjustmentdiaphragm

Servodiaphragm

Internalfeedback

Controlspring

Solenoid coil

Supplynozzle

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 16

3 1 2 Airgas ratio control VAGThe airgas ratio control VAG controls the outlet pressure pd depending on the variable air control pressure psaThe ratio of gas pressure to air pressure remains constant 11 The VAG is suitable for a control range up to 101If the burner operates at low-fire rate the gasair mixture can be changed by adjusting the zero point spring ldquoNrdquo

Function

psa

pd

Zero point setting N zero point spring

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 17

Function

3 1 3 Flow rate regulators VAH VRHThe flow rate regulators VAH VRH control the gas flow rate depending on the variable air flow rate The ratio of gas flow rate to air flow rate remains constant If the burner operates at low-fire rate the gasair mixture can be changed by adjusting the zero point spring ldquoNrdquoIn addition flow rate regulator VAH is designed as a gas solenoid valve and shuts off the gas or air supply safely

psa

psa-

pd-

pdInternal feedback

Zero point setting N zero point spring

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 18

3 1 4 Variable airgas ratio control VAVThe servo regulator maintains a set constant outlet pressure pd The variable airgas ratio control VAV controls the outlet pressure pd depending on the variable air control pressure psa The ratio of gas pressure to air pressure remains constantThe settings N and V can be changed and read off from both sides of the unit using the adjusting screwsThe ratio of gas pressure to air pressure at low-fire rate can be changed by adjusting the zero point setting N By turning the adjusting screw ldquoNrdquo the force of the zero point spring and thus the zero point is changed by plusmn 15 mbar (06 WC) see page 34 (Project planning information)The high-fire rate is set by turning the adjusting screw ldquoVrdquo until the required flue gas values are achieved see page 34 (Project planning information) The ratio of gas pressure to air pressure can be set from 061 to 31The settings N and V influence each other and the adjustment process must be repeated if necessaryThe outlet pressure pd is applied to the servo diaphragm via the internal feedback The combustion chamber control pres-sure psc is transmitted to the space under the air and servo diaphragms via an impulse lineThe pressure differential psa - psc is achieved on the air diaphragm and the pressure differential pd - psc on the servo diaphragm This ensures that pressure fluctuations in the combustion cham-ber can be compensated The flue gas values remain constant in the case of fluctuations in the combustion chamber pressure (pd - psc) = (psa - psc) times V + N

Function

pdpsc

psa

Air diaphragm

Transmission ratio V

Zero point setting N zero point spring

Internalfeedback

Adjustment diaphragm

Servo diaphragm

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 19

1 COM

2 NO

3 NC

3 1 5 Pressure regulator with gas solenoid valve VAx S position indicator with visual indicatorOpening when the pressure regulator is opened the posi-tion indicator switches The visual indicator is activated The ldquoopenrdquo signal is marked in red The double valve seat opens to release the volume of gasClosing the pressure regulator VAx is disconnected from the voltage supply and the closing spring presses the double valve disc on to the valve seat The position indicator is actuated The visual indicator is white for ldquoclosedrdquoThe actuator cannot be rotated on a pressure regulator with a position indicator and a visual indicatorNOTE NFPA 86 ndash the following must be taken into account as soon as the capacity of the pilot or main burner exceeds 117 kW (400000 BTUh) safety shut-off valve VASS must be fitted with a proof of closure overtravel switch with a visual position indicator and the burner-side pressure regulator with gas solenoid valve VAxS must also be fitted with a position indicator with visual indicator The closed position can be verified using the proof of closure switch of the gas solenoid valve VASS

Function

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 20

3 2 AnimationThe interactive animation shows the function of the valVario controls VADVAGVAHVAVClick on the picture The animation can be controlled using the control bar at the bottom of the window (as on a DVD player) To play the animation you will need Adobe Reader 7 or a newer version If you do not have Adobe Reader on your system you can download it from the Internet

Go to wwwadobecom click on ldquoAdobe Readerrdquo at the bottom of the page and follow the instructionsIf the animation does not start to play you can download it from the document library (wwwdocuthekcom) as an inde-pendent application

Function

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 21

3 3 Connection diagramWiring to EN 60204-1Connection diagram for VAxS with position indicator ndash see page 19 (Pressure regulator with gas solenoid valve VAxS position indicator with visual indicator)

3 3 1 VAx with M20 cable gland

L1 (+)

N (ndash)

3 3 2 VAx with plug

1 = N (-)

2 = L1 (+)

3 3 3 VAS with VADVAGVAHVAV with M20 cable glandL1V1 (+)

N (-)

L1V2 (+)

3 3 4 VAS with VADVAGVAHVAV with plug2 = L1V1 (+)

1 = N (-)

3 = L1V2 (+)

Function

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 22

4 Replacement possibilities for MODULINE pressure regulators with gas solenoid valve4 1 GVS GVI GVIB GVR and GVRH are to be replaced by VAD VAG VAG+VAS VAH and VAV

Type TypeGVS Pressure regulator with gas solenoid valve Pressure regulator with gas solenoid valve VADGVI Airgas ratio control with gas solenoid valve Airgas ratio control with gas solenoid valve VAG

GVIB Airgas ratio control with gas solenoid valve and bypass valve

Airgas ratio control with gas solenoid valve and bypass valve VAG+VAS

GVRH Flow rate regulator with gas solenoid valve Flow rate regulator with gas solenoid valve VAHGVR Variable airgas ratio control with gas solenoid valve Variable airgas ratio control with solenoid valve VAV115125 Flange 38 Size 115

Size 125 on request

115125 Flange frac12 Size 115

Size 125 Size 1 DN 15 115

115125 Flange frac34 Size 115

Size 125 Size 1 DN 20 120

115125 Flange 1 Size 115

Size 125 Size 1 DN 25 125

232240 Flange 1 Size 232

Size 240 on request

232240 Flange 1frac12 Size 232

Size 240 Size 2 DN 40 240

350 Flange 1frac12 Size 350 on request350 Flange 2 Size 350 Size 3 DN 50 350ML MODULINE + Rp internal thread connection fl anges Rp internal thread RTML MODULINE + NPT internal thread connection fl anges NPT internal thread N01 pu max 100 mbar (15 psig) pu max 500 mbar (7 psig) 02 200 mbar (3 psig) 500 mbar (7 psig)

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 23

Replacement possibilities for MODULINE pressure regulators with gas solenoid valve gt GVS GVI GVIB GVR and GVRH are to be replaced by VAD VAG VAG+VAS VAH and VAV

ContinuationType Type

Quick opening Quick opening NF1 Control ratio 11 Control ratio 11 K Mains voltage 24 V DC Mains voltage 24 V DC K

ndash 100 V AC PQ 120 V AC 120 V AC Q

ndash 200 V AC YT 220240 V AC 230 V AC W3 Electrical connection via terminals Electrical connection via terminals 6 Electrical connection via socket Electrical connection via socket 9 Metal terminal connection box Electrical connection via terminals S Position indicator Position indicator with visual indicator SG Position indicator for 24 V Position indicator for 24 V with visual indicator GM Suitable for biologically produced methane Suitable for biologically produced methane

Pressure test point at the inlet Pressure test point at the inlet and outlet Outlet pressure pd -25

Outlet pressure pd 25 ndash 25 mbar (1 ndash 10 WC)

2 ndash 90 mbar (08 ndash 36 WC) 20 ndash 50 mbar (8 ndash 20 WC) -5035 ndash 100 mbar (14 ndash 40 WC) -100Standard seat A

ExampleGVS 350ML01T3with Rp 2 connection flanges

ExampleVAD 350RNW-100A

with test points

= standard = available Pressure test points may be attached at the left- andor right-hand side Position indicator with visual indicator can be attached at the left- or right-hand side

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 24

∆p [i

nch

WC]

Qn [SCFH]100 400 600 4000 60001000 200020 30 40 50 200 3006015 80

1

08

1

2

3

4

56

8

10

20

30

40

5060

80

100

200

∆p [m

bar]

5

8

3

20

10

30

40

80

60

300

400

50

04 06 1 2 3 4 5 808 10 20 30 402

03 60 100 200

100

200

500

1

3

2

04 06 08 1 2 3 4 5 6 8 10 20 30 40

04 06 08 1 2 3 4 5 6 8 10

200

80 10020 3003

03Qn [m3h]

02

50 60 80 100

40 50 60

VAD

115

B

VAD

120

AVA

D 12

5A

P1P2

VAD

240

AVA

D 35

0A

= natural gas (ρ = 080 kgm3) = propane (ρ = 201 kgm3) = air (ρ = 129 kgm3)

The characteristic flow rate curves have been meas-ured with the specified flanges and a fitted strainer If two or more valves are combined the pressure loss of each additional valve drops by approx 5

metric imperial

Enter densityFlow rate Qn

Inlet pressure pu

Outlet pressure pd

Product RV v

Pressure loss ∆p

∆pmin

5 Flow rate5 1 Selection example for VADNatural gas Flow rate Qmax = 30 m3h Inlet pressure pu = 80 mbar Outlet pressure pd = 60 mbarThe desired control ratio from high-fire to low-fire rate is RV = 101High fire ∆p = pu - pd = 20 mbar Point P1Low fire Point P2 Qmin = 26 m3h at ∆p = 20 mbar RV = Qmax Qmin = 1151

Point P1 and point P2 must be within the working range of a unit size We recommend that you select the smallest size to achieve the best control properties

5 1 1 Calculate VAD

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 25

∆p [i

nch

WC]

Qn [SCFH]100 400 600 4000 60001000 200020 30 40 50 200 3006015 80

1

08

1

2

3

4

56

8

10

20

30

40

5060

80

100

200

∆p [m

bar]

5

8

3

20

10

30

40

80

60

300

400

50

04 06 1 2 3 4 5 808 10 20 30 402

03 60 100 200

100

200

500

1

3

2

04 06 08 1 2 3 4 5 6 8 10 20 30 40

04 06 08 1 2 3 4 5 6 8 10

200

80 10020 3003

03Qn [m3h]

02

50 60 80 100

40 50 60

= pd min lt 5 mbar

VAG

VxH

VAV

115

BVA

GV

xHV

AV 12

0A

VAG

VxH

VAV

125

A

P1

P2

VAG

VxH

VAV

240

AVA

GV

xHV

AV 3

50A

= natural gas (ρ = 080 kgm3) = propane (ρ = 201 kgm3) = air (ρ = 129 kgm3)

The characteristic flow rate curves have been meas-ured with the specified flanges and a fitted strainer If two or more valves are combined the pressure loss of each additional valve drops by approx 5

5 2 Selection example for VAG VAH VRH VAV Natural gas Flow rate Qmax = 30 m3h Inlet pressure pu = 80 mbar Outlet pressure pd max VAG = 60 mbarThe desired control ratio from high-fire to low-fire rate is RV = 101High fire ∆p = pu - pd max = 20 mbar Point P1Low fire pd min = pd max RV2 = 06 mbar Qmin = Qmax RV = 3 m3h ∆p = pu - pd min = 794 mbar Point P2 select VAG 120APoint P1 and point P2 must be within the working range of a unit size We recommend that you select the smallest size to achieve the best control properties

metric imperial

Enter densityFlow rate Qn

Inlet pressure pu

Outlet pressure pd

Product RV v

5 2 1 Calculate VAG VxH VAV

Pressure loss ∆p

∆pmin

Flow rate

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 26

∆p [i

nch

WC]

Qn [SCFH]100 400 600 4000 60001000 200020 30 40 50 200 3006015 80

1

08

1

2

3

4

56

8

10

20

30

40

5060

80

100

200

∆p [m

bar]

5

8

3

20

10

30

40

80

60

300

400

50

04 06 2 3 4 5 808 10 20 30 402

03 60 100 200

100

200

500

1

3

2

04 06 08 1 2 3 4 5 6 8 10 20 30 40

04 06 08 1 2 3 4 5 6 8 10

200

80 10020 3003

03Qn [m3h]

02

50 60 80 100

40 50 60

VAG

115

N

P1VAG

125

N

VAG

120

N

VAG

240

NP2

VAG

350

N

= natural gas (ρ = 080 kgm3) = propane (ρ = 201 kgm3) = air (ρ = 129 kgm3)

The characteristic flow rate curves have been meas-ured with the specified flanges and a fitted strainer If two or more valves are combined the pressure loss of each additional valve drops by approx 5

5 3 Selection example for zero governor VAG NNatural gas Flow rate Qmax = 30 m3h Inlet pressure pu = 20 mbar Outlet pressure pd = 0 mbar (atmospheric pressure)The desired control ratio from high-fire to low-fire rate is RV = 101High fire ∆p = pu - pd max = 20 mbar Point P1Low fire Point P2 Qmin = 24 m3h at ∆p = 20 mbar RV = Qmax Qmin = 1231Point P1 and point P2 must be within the working range of a unit size We recommend that you select the smallest size to achieve the best control properties

metric imperial

Enter densityFlow rate Qn

Inlet pressure pu

Outlet pressure pd

Product RV

5 3 1 Calculate VAG N

Pressure loss ∆p

∆pmin

Flow rate

v

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 27

6 Selection6 1 Selection table for pressure regulator with solenoid valve VAD

Accessories right Accessories left

Type1) T R N F N K P Q Y W S2) G2) R2) L2) M20

cab

le g

land

Plug

with

soc

ket

Plug

with

out s

ocke

t

-25-50 -100 A B Scre

w p

lug

Pres

sure

test

poi

nt

DG

17V

C 3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

Scre

w p

lug

Pres

sure

test

poi

nt

DG

17V

C 3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

VAD 115

VAD 120

VAD 125

VAD 240

VAD 350

= standard = available1) The following nominal inlet fl ange diameters are also available size 1 with nominal diameter DN 10 size 2 with nominal diameters DN 25 DN 32 and DN 50 size 3 with nominal diameters DN 40 and DN 652) Position indicator and bypasspilot gas valve cannot be fi tted together on the same side3) Specify the test point for inlet pressure pu or outlet pressure pdHelp for selecting the pressure regulator VAD can be found on the ProFi DVD wwwkromschroedercom Products DVD Product fi nder ldquoProFirdquo

Order exampleVAD 240RNW-100A

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 28

Selection

6 2 Type code for VADCode DescriptionVAD Pressure regulator with solenoid valve1 ndash 3 SizeT T-product10 ndash 65 Nominal inlet and outlet diameterRNF

Rp internal threadNPT internal thread

ISO fl angeN Quick opening quick closingKPQYW

Mains voltage 24 V DCMains voltage 100 V AC 5060 HzMains voltage 120 V AC 5060 HzMains voltage 200 V AC 5060 HzMains voltage 230 V AC 5060 Hz

SG

Position indicator with visual indicatorPosition indicator for 24 V with visual indicator

RL

Viewed from the right (in the direction of fl ow)Viewed from the left (in the direction of fl ow)

-25-50-100

Outlet pressure pd 25 ndash 25 mbar20 ndash 50 mbar

35 ndash 100 mbarAB

Standard valve seatReduced valve seat

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 29

Selection

6 3 Selection table for airgas ratio control with solenoid valve VAG flow rate regulators VAH VRH

Type1) T R N F N K P Q Y W S2) G2) R2) L2) M20

cab

le g

land

Plug

with

soc

ket

Plug

with

out s

ocke

t

A B E K A N Scre

w p

lug

Pres

sure

test

poi

ntD

G 1

7VC

3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

Scre

w p

lug

Pres

sure

test

poi

ntD

G 1

7VC

3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

VAG 115 VAG 120 VAG 125 VAG 240 VAG 350

VAH 115 VAH 120 VAH 125 VAH 240 VAH 350

VRH 115 VRH 120 VRH 125 VRH 240 VRH 350

= standard = available1) The following nominal inlet fl ange diameters are also available size 1 with nominal diameter DN 10 size 2 with nominal di-

ameters DN 25 DN 32 and DN 50 size 3 with nominal diameters DN 40 and DN 652) Position indicator and bypasspilot gas valve cannot be fi tted together on the same side3) Specify the test point for inlet pressure pu or outlet pressure pdHelp for selecting the regulators can be found on the ProFi DVD wwwkromschroedercom Products DVD Product fi nder ldquoProFirdquo

Order exampleVAG 240RNWAE

Accessories right Accessories left

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 30

Selection

6 4 Type code for VAG VAH VRHCode DescriptionVAGVAHVRH

Airgas ratio control with solenoid valveFlow rate regulator with solenoid valve

Flow rate regulator1 ndash 3 SizeT T-product15 ndash 50 Nominal inlet and outlet diameterRNF

Rp internal threadNPT internal thread

ISO fl angeN1) Quick opening quick closingK1)

P1)

Q1)

Y1)

W1)

Mains voltage 24 V DCMains voltage 100 V AC 5060 HzMains voltage 120 V AC 5060 HzMains voltage 200 V AC 5060 HzMains voltage 230 V AC 5060 Hz

S1)

G1)Position indicator with visual indicator

Position indicator for 24 V with visual indicatorRL

Viewed from the right (in the direction of fl ow)Viewed from the left (in the direction of fl ow)

AB

Standard valve seatReduced valve seat

EKAN

Connection kit for air control pressure psaVAG VAH VRH compression fi tting

VAG plastic hose couplingVAG VAH VRH NPT 18 adapter

VAG zero governor1) Only available for VAG VAV VAH

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 31

6 5 Selection table for variable airgas ratio control with solenoid valve VAVAccessories right Accessories left

Type1) T R N F N K P Q Y W S2) G2) R2) L2) M20

cab

le g

land

Plug

with

soc

ket

Plug

with

out s

ocke

t

A B E K A Scre

w p

lug

Pres

sure

test

poi

ntD

G 1

7VC

3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

Scre

w p

lug

Pres

sure

test

poi

ntD

G 1

7VC

3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

VAV 115

VAV 120

VAV 125

VAV 240

VAV 350

= standard = available1) The following nominal inlet fl ange diameters are also available size 1 with nominal diameter DN 10 size 2 with nominal diameters DN 25 DN 32 and DN 50 size 3 with nominal diameters DN 40 and DN 652) Position indicator and bypasspilot gas valve cannot be fi tted together on the same side3) Specify the test point for inlet pressure pu or outlet pressure pdHelp for selecting the variable airgas ratio control VAV can be found on the ProFi DVD wwwkromschroedercom

Products DVD Product fi nder ldquoProFirdquo

Order exampleVAV 240RNWAK

Selection

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 32

Selection

6 6 Type code for VAVCode DescriptionVAV Variable airgas ratio control with solenoid valve1 ndash 3 SizeT T-product15 ndash 50 Nominal inlet and outlet diameterRNF

Rp internal threadNPT internal thread

ISO fl angeN Quick opening quick closingKPQYW

Mains voltage 24 V DCMains voltage 100 V AC 5060 HzMains voltage 120 V AC 5060 HzMains voltage 200 V AC 5060 HzMains voltage 230 V AC 5060 Hz

SG

Position indicator with visual indicatorPosition indicator for 24 V with visual indicator

RL

Viewed from the right (in the direction of fl ow)Viewed from the left (in the direction of fl ow)

AB

Standard valve seatReduced valve seat

EKA

Connection kit for air control pressure psa and combus-tion chamber control pressure psc

compression fi ttingplastic hose coupling

NPT 18 adapter

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 33

Selection

6 7 AccessoriesModularly configurable withndash Screw plugsndash Pressure test pointsndash Pressure switch DGVC for inlet

andor outlet pressurendash Tightness control TCndash Bypasspilot gas valve VBY 8 for

size 1ndash Bypasspilot gas valve VAS 1For further information see page 37 (Accessories)

Position indicator

Plug with socket

Plug

Screwplugs

Pressuretest points

Pressure switch DGC Tightness

control TC

Bypasspilot gas valve VBY 8 for size 1

Bypasspilot gas valve VAS 1

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 34

7 Project planning informationDo not store or install the unit in the open airThe inlet pressure pu and the outlet pressure pd can be meas-ured on both sides of the valve body To increase the control accuracy an external impulse line can be connected instead of the pressure test point pd

VAD

pu

pd

(psa)

VAGpd

pu

psa

psa

VAD measurement point for the gas outlet pressure pd on the regulator body A combustion chamber control line (psc) can be connected to connection psa for maintaining a constant burner capacityVAG additional measurement point for the air control pressure psa on the regulator body

VAV

psapsc

pu

pd

VAH VRH

pu

pd-

pdpsa-

psa

VAV measurement point for the outlet pressure pd on the regulator bodyVAH additional measurement points for the outlet pressure pd- and the air control pressure psapsa- on the regulator body

7 1 Installation

GFK

VAGVAH

GFKVAD

Sealing material and thread cuttings must not be allowed to get into the valve housing Install a filter upstream of every system

gt20 mmgt0 79

The unit must not be in contact with masonry Minimum clear-ance 20 mm (079 inches)Ensure that there is sufficient space for installation and ad-justment

le +100 degCle +212 degF

The solenoid body heats up during operation ndash depending on ambient temperature (max 60degC140degF) and intrinsic heating (approx 40degC104degF)

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 35

In the case of double solenoid valves the position of the con-nection box can only be changed by removing the actuator and reinstalling it offset by 90deg or 180deg

If more than three valVario controls are installed in line the controls must be supported

The seals in some gas compression fittings are approved for temperatures of up to 70degC (158degF) This temperature limit will not be exceeded if the flow through the pipe is at least 1 msup3h (3531 SCFH) of gas and the maximum ambient temperature is 50degC (122degF)

7 1 1 Installation position

pu ge 80 mbar(80 hPa32 WC)

VAD VAG VAH VRH VAV

In humid environments black solenoid actuator in the vertical upright position only

VAD VAG VAH VRH black solenoid actuator in the vertical upright position or tilted up to the horizontal not upside downVAG VAH horizontal position only if pu ge 80 mbar (32 WC))VAV installation in the vertical position only black solenoid actuator in the vertical upright positionTo ensure that the airgas ratio control VAG the flow rate regulator VAH VRH or the variable airgas ratio control VAV can react quickly when the load is changed the impulse line for the air control pressure psa and for VAV the impulse line for the combustion chamber control pressure psc should be kept as short as possible The tube internal diameter for the impulse line must always be ge 39 mm (015)

VAH VRHIt is not permitted to install a gas solenoid valve VAS down-stream of flow rate regulator VAH VRH and upstream of fine-adjusting valve VMV The VAS would no longer be able to perform its function as a second safety valve if installed in the above-mentioned position

M

VMV

VAH

VASVAS

pd-

psa-psa

VMV

VAH pd-

psa-psa

The measuring orifice in the air line for impulse lines psa and psa- must always be installed downstream of the air control valve

Project planning information gt Installation

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 36

VAVThe impulse line for the combustion chamber control pres-sure psc must be fitted so that no condensation can enter the pressure regulator but rather flows back into the combustion chamber

7 2 Setting the low-fire rate on VAG VAH VRH VAV

-10 +05-05

ndash

+1

-15

mbar

+15

06

1 152

3

N V

+ +ndash

+30 -15+15

ndash

-3

+5

mbar

-5

N

+

VAG VAH VRH VAV

If the burner operates at low-fire rate the gasair mixture can be changed using the parallel shift of the characteristic curve by turning the adjusting screw ldquoNrdquoAdjusting range at low fire VAG VAH VRH -5 to +5 mbar (-195 to +195 WC) VAV -15 to +15 mbar (-06 to +06 WC)

7 3 Setting the high-fire rate on VAVTo set the high-fire rate the transmission ratio is changed us-ing the adjusting screw ldquoVrdquo until the required flue gas values are achievedTransmission ratio V = pdpsa = 061 to 31The settings N and V can influence each other and must be repeated if necessary

+N+V

-V

-N

VAV

psa [mbar]

p d [m

bar]

7 3 1 CalculationWith no connection to the combustion chamber control pres-sure psc pd = V times psa + NWith connection to the combustion chamber control pressure psc (pd - psc) = V times (psa - psc) + N

Project planning information

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 37

pu pd

21579

4836

085310

189

142

8 Accessories8 1 Gas pressure switch DG VC for VAx VRHType Adjusting range [mbar]DG 17VC 2 to 17DG 40VC 5 to 40DG 110VC 30 to 110DG 300VC 100 to 300

Scope of delivery 1 times pressure switch for gas 2 times retaining screws 2 times sealing rings

8 2 Gas pressure switch DG VCT for VAx T VRH TType Adjusting range [WC]DG 17VCT 08 to 68DG 40VCT 2 to 16DG 110VCT 12 to 44DG 300VCT 40 to 120

Scope of delivery 1 times gas pressure switch with AWG 18 connection wires 2 times retaining screws 2 times sealing ringsMonitoring the inlet pressure pu the electrical plug of the pressure switch for gas points towards the inlet flangeMonitoring the outlet pressure pd the electrical plug of the pressure switch for gas points towards the outlet flange

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 38

A BC

D

FE

ACD

F

B

E

8 3 Bypass valvepilot gas valve VAS 18 3 1 VAS 1 attached to VADVAGVAHVAV 1Scope of delivery A 1 times bypasspilot gas valve VAS 1 B 4 times O-rings C 4 times double nuts D 4 times connection parts E 1 times mounting aidBypass valve VAS 1 F 2 times connection pipes if the bypass valve has a blind flange

at the outlet sidePilot gas valve VAS 1 F 1 times connection pipe 1 times sealing plug if the pilot gas valve

has a threaded flange at the outlet side

Accessories

8 3 2 VAS 1 attached to VADVAGVAHVAV 2 VADVAGVAHVAV 3Scope of delivery A 1 times bypasspilot gas valve VAS 1 B 4 times O-rings C 4 times spacer sleeves D 4 times connection parts E 1 times mounting aidBypass valve VAS 1 F 2 times connection pipes if the bypass valve has a blind flange

at the outlet sidePilot gas valve VAS 1 F 1 times connection pipe 1 times sealing plug if the pilot gas valve

has a threaded flange at the outlet side

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 39

2

3

456

810

20

30

405060

80100

∆p [m

bar]

005 01 02 03 05 08 1 2 3 4 51

3

2

Qn [m3h]

1

01

02

03

0405

08

003

002

6 8 10

005 01 02 03 05 08 1 2 3 4 5003 6 8 10

20

005 01 02 03 05 08 1 2 3 4 5003 6 8 10 20

30

∆p [i

nch

WC]

1

2

3

456

810

20

30

40

04

004

006

00801

02

03

0506

08

Qn [SCFH]10 40 60 100 200 3001 500 10002 3 4 5

120 306 8

21 3 4 5 6 7 8 910

8 3 3 Flow rate

The characteristic flow rate curves have been measured for bypass valve VAS 1 with connection pipe diameter 1 to 10 mm (004 to 04) and for the pilot gas valve with 10 mm (04) connection pipe

Bypass valve connection pipe diameter [mm]

Pilo

t gas

val

ve 1

0 m

m (0

4)

conn

ectio

n pi

pe d

iam

eter

Accessories gt Bypass valvepilot gas valve VAS 1

= natural gas (ρ = 080 kgm3) = propane (ρ = 201 kgm3) = air (ρ = 129 kgm3)

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 40

Accessories

8 4 Bypass valvepilot gas valve VBY 8 for VADVAGVAHVAV 1

B

C

AVBY 8

VAx 1

55

(217)40(157)

70 (276)

80(315)

Rp frac14(pilot gas valve)

For mounting on VAD VAG VAH VAV 1 and double solenoid valve VCD VCG VCH VCV 1

8 4 1 Scope of delivery VBY 8I as bypass valveA 1 times bypass valve VBY 8IB 2 times retaining screws with 4 times O-rings both retaining screws

have a bypass orificeC 1 times grease for o-rings

8 4 2 Scope of delivery VBY 8R as pilot gas valveA 1 times pilot gas valve VBY 8RB 2 times retaining screws with 5 x O-rings one retaining screw

has a bypass orifice (2 x O-rings) the other does not (3 x O-rings)

C 1 times grease for O-rings

8 4 3 SelectionType I R W Q K 6L -R -L E B D 05

VBY 8

Order exampleVBY 8RW6L-LED

8 4 4 Type codeCode DescriptionVBY Gas solenoid valve8 Nominal sizeIR

For internal gas pick-up as bypass valveFor external gas pick-up as pilot gas valve

KQW

Mains voltage 24 V DC Mains voltage 120 V AC 5060 HzMains voltage 230 V AC 5060 Hz

6L Electrical connection via plug and socket with LED-R-L

Attachment side of main valve right-hand sideAttachment side of main valve left-hand side

EB

Attached to the VAxEnclosed (separate packing unit)

05D

Nozzle diameter = 05 mm (002)Flow adjustment

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 41

2

01

02

03

05

081

3

456

810

20

30

405060

80100

∆p [m

bar]

1

3

201 02 03 05 1 2 3001 003 4

Qn [m3h]

02 03 05 1 2

01 02 05

002 006

002

002 006 1

0010006 005 01

001

0003

0006 2 3

VBY 8DVBY 805

∆p [i

nch

WC]

1

2

3

456

810

20

30

40

040506

08

1

Qn [SCFH]10 40 60 1005 2081 2 30402

01

02

03

004005006

008

Adjusting range

8 4 5 Flow rateVBY 8 D

+

-

The flow rate can be set by turning the flow rate restrictor (4 mm016 Allen screw) frac14 of a turn Flow rate 10 to 100

VBY 8 05The flow is routed through a 05 mm (002) nozzle and thus has a fixed characteristic flow rate curve Adjustment is not possible

8 4 6 Technical dataInlet pressure pu max 500 mbar (7 psig)Ambient temperature 0 to +60degC (32 to 140degF) no condensation permittedStorage temperature 0 to +40degC (32 to 104degF) no condensation permittedPower consumption 24 V = 8 W 120 V = 8 W 230 V = 95 WEnclosure IP 54

Accessories gt Bypass valvepilot gas valve VBY 8 for VADVAGVAHVAV 1

= natural gas (ρ = 080 kgm3) = propane (ρ = 201 kgm3) = air (ρ = 129 kgm3)

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 42

TC 116VB C

56(22)

49(193)

27(106)

A

A

VCx 1 VCx 2VCx 3

8 5 Tightness control TC 116Vfor VAx 1 ndash 3An adapter plate is required to attach the tightness control to the right- or left-hand side of the pressure regulator with gas solenoid valveScope of delivery A 1 times adapter plate B 2 times O-rings C 2 times retaining screwsFor attachment to left-hand side Order No 74922391 right-hand side Order No 74921995

8 6 Pressure test pointsTest points to check the inlet pressure pu and outlet pressure pdScope of delivery 1 x pressure test points with 1 x profiled sealing rings Order No 74923390

8 7 Cable gland setWhen wiring a double solenoid valve with pressure regula-tor VCx the connection boxes are to be connected using a cable gland setThe cable gland set can only be used if the connection boxes are at the same height and on the same side and if both valves are equipped either with or without a proof of closure switchVA 1 Order No 74921985 VA 2 Order No 74921986 VA 3 Order No 74921987

Accessories

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 43

A B

D

C

Accessories

8 9 Differential pressure orifice

Size PipeDN

Differential pressure orifi cewith outlet dia

1 15 17 mm 0671 20 25 mm 0981 25 30 mm 1182 40 46 mm 1813 50 58 mm 228

If pressure regulator VADVAGVAV 1 is retrofitted upstream of gas solenoid valve VAS 1 a DN 25 differential pressure orifice with outlet opening d = 30 mm (118) must be inserted at the outlet of the pressure regulatorIn the case of pressure regulator VAx 115 or VAx 120 the DN 25 differential pressure orifice must be ordered separately and retrofitted Order No 74922240

8 8 Seal set VA 1 ndash 3VA 1 Order No 74921988 VA 2 Order No 74921989 VA 3 Order No 74921990Scope of deliveryA 1 times double block seal B 2 times O-rings (flange) C 2 times O-rings (pressure switch) for pressure test pointscrew plug D 2 times sealing rings (flat sealing) and 2 times profiled sealing rings

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 44

BA

C

pd-

8 11 Attachment blockFor locked installation of pressure gauge and other acces-soriesScope of delivery A 1 times attachment block B 2 times self-tapping screws for installation C 2 times O-rings

Accessories

8 10 Retaining frameIn the event that a pressure regulator VAx is installed at a later point upstream of a gas solenoid valve VAS a measur-ing orifice VMO or a fine-adjusting valve VMV the retaining frame must be fitted at the inlet of the second device in order to fasten the differential pressure orifice at the regulator outlet Order the retaining frame separatelyRetaining frame for Size 1 Order No 74923029 Size 2 Order No 74923030 Size 3 Order No 74923031

8 12 Gas control lineFine-adjusting valve VMV can be installed on the flow rate regulator VAH for fine adjustment of the gas flow rateThe gas control line for gas outlet pressure pd- is available with 2 18 compression fittingsSize 1 Order No 74924458 Size 2 Order No 74924459

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 45

8 13 Measuring orifice VMOThe measuring orifice VMO is designed to reduce the gas and air flow rates and is installed downstream of the valVario control The measuring orifice is available with Rp internal thread (NPT internal thread) or flange to ISO 7005See wwwdocuthekcom Elster Kromschroumlder Krom-schroumlder LBE Products 03 Valves and butterfly valves valVario accessories Type of document Technical Informa-tion VMO

Accessories

8 14 Filter module VMFUsing the filter module VMF the gas flow upstream of the gas solenoid valve VAS and the airgas ratio control is cleaned The filter module is available with Rp internal thread (NPT internal thread) or flange to ISO 7005 and can also be supplied with fitted pressure switch as an optionSee wwwdocuthekcom Elster Kromschroumlder Krom-schroumlder LBE Products 03 Valves and butterfly valves valVario accessories Type of document Technical Informa-tion VMF

8 15 Fine-adjusting valve VMVThe flow rate is set using the fine-adjusting valve VMV The fine-adjusting valve is available with Rp internal thread (NPT internal thread) or flange to ISO 7005See wwwdocuthekcom Elster Kromschroumlder Krom-schroumlder LBE Products 03 Valves and butterfly valves valVario accessories Type of document Technical Infor-mation VMV

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 46

9 Technical dataGas types natural gas LPG (gaseous) biologically produced methane (max 01 -by-vol H2S) or clean air other gases on request The gas must be clean and dry in all temperature conditions and must not contain condensateCE and FM approved UL listed max inlet pressure pu 10 ndash 500 mbar (4 ndash 200 WC) FM approved (230 V AC 120 V AC 24 V DC) non opera-tional pressure 700 mbar (10 psig)ANSICSA approved (230 V AC 120 V AC 24 V DC) up to 350 mbar (5 psig)Opening time of the solenoid valve quick opening le 05 s Closing time quick closing lt 1 sMedium and ambient temperatures -20 to +60degC (-4 to +140degF) no condensation permittedStorage temperature -20 to +40degC (-4 to +104degF)Enclosure IP 65Valve housing aluminium valve seal NBRConnection flanges with internal thread Rp to ISO 7-1 NPT to ANSIASMESafety valve Class A to EN 161 Factory Mutual Research Class 7400 Process Control Valves (230 V AC 120 V AC 24 V DC) ANSI Z2121 and CSA 65 ANSI Z2118 and CSA 63Control class A to EN 88-1Control range up to 101

Mains voltage 230 V AC +10-15 5060 Hz 200 V AC +10-15 5060 Hz 120 V AC +10-15 5060 Hz 100 V AC +10-15 5060 Hz 24 V DC plusmn20Duty cycle 100Power factor of the solenoid coil cos φ = 09Power consumption

Type Voltage Power

VAx 1

24 V DC 25 W ndash100 V AC 25 W (26 VA)120 V AC 25 W (26 VA)200 V AC 25 W (26 VA)230 V AC 25 W (26 VA)

VAx 2 VAx 3

24 V DC 36 W ndash100 V AC 36 W (40 VA)120 V AC 40 W (44 VA)200 V AC 40 W (44 VA)230 V AC 40 W (44 VA)

VBY24 V DC 8 W ndash

120 V AC 8 W ndash230 V AC 95 W ndash

Cable gland M20 times 15Electrical connection cable with max 25 mm2 (AWG 12) or plug with socket to EN 175301-803

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 47

Position indicator contact rating

Type Voltage Min current(resistive load)

Max current(resistive load)

VAxS VCxS 12 ndash 250 V AC 5060 Hz 100 mA 3 AVAxG VCxG 12 ndash 30 V DC 2 mA 01 A

Position indicator switching frequency max 5 times per minute

Switching current [A]

Switching cyclescos φ = 1 cos φ = 06

01 500000 50000005 300000 250000

1 200000 1000003 100000 ndash

Limited to max 200000 cycles for heating systems

9 1 VADOutlet pressure pd VAD-25 25 ndash 25 mbar (1 ndash 10 WC) VAD-50 20 ndash 50 mbar (8 ndash 20 WC) VAD-100 35 ndash 100 mbar (14 ndash 40 WC)Combustion chamber control pressure psc (connection psa)

-20 to +20 mbar (-78 to +78 WC)

VAD

pu

pd

(psa)

9 2 VAGOutlet pressure pd 05 ndash 100 mbar (02 ndash 40 WC)Air control pressure psa 05 ndash 100 mbar (02 ndash 40 WC)

Adjusting range at low fire plusmn5 mbar (plusmn2 WC)Transmission ratio of gas to air 11The inlet pressure must always be higher than the air control pressure psa + pressure loss ∆p + 5 mbar (2 WC)

VAGpd

pu

psa

psa

VAGK 1 x 18 coupling for plastic hose (internal dia 39 mm (015) external dia 61 mm (024)) or VAGE 1 x 18 compression fitting for 6 times 1 tube or VAGA 1 x NPT 18 adapter or VAGN zero governor with breathing orifice

9 3 VAH VRHAir control pressure psa 06 ndash 100 mbar (024 ndash 40 WC) Differential air pressure ∆psa (psa - psa-) 06 ndash 50 mbar (024 ndash 197 WC) Differential gas pressure ∆pd (pd - pd-) 06 ndash 50 mbar (024 ndash 197 WC)Transmission ratio of gas to air 11The inlet pressure must always be higher than the differen-tial air pressure ∆psa + pressure loss ∆p + max gas pres-sure on burner + 5 mbar (2 WC)Adjusting range at low fire plusmn5 mbar (plusmn2 WC)

Technical data

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 48

VAHVRH

pd-

pu

psa-

psa

Connection of the air control pressure psaVAHE VRHE 3 x 18 compression fitting for 6 times 1 tube or VAHA VRHA 3 x NPT 18 adapter

9 4 VAVOutlet pressure pd 05 ndash 30 mbar (02 ndash 117 WC)Air control pressure psa 04 ndash 30 mbar (015 ndash 117 WC)Combustion chamber control pressure psc

-20 to +20 mbar (-78 to +78 WC)Min control pressure differential psa - psc 04 mbar (015 WC)Min pressure differential pd - psc 05 mbar (02 WC)Adjusting range at low fire plusmn15 mbar (plusmn06 WC)Transmission ratio of gas to air 061 to 31The inlet pressure pu must always be higher than the air control pressure psa times transmission ratio V + pressure loss ∆p + 15 mbar (06 WC)

pu

pd psapsc

VAV

VAVK 2 x plastic hose couplings (internal dia 39 mm (015) external dia 61 mm (024)) or VAVE 2 x 18 compression fitting for 6 times 1 tube or VAVA 2 x NPT 18 adapter

Technical data

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 49

9 5 Safety-specific characteristic values for VAx 1 ndash 3For SILSuitable for Safety Integrity Level SIL 1 2 3

Diagnostic coverage DC 0

Type of subsystem Type A to EN 61508-2 74312

Operating mode High demand mode pursu-ant to EN 61508-4 3512

For PLSuitable for Performance Level PL a b c d e

Category B 1 2 3 4Common cause failure CCF gt 65Application of essential safety requirements Satisfied

Application of tried-and-tested safety requirements Satisfied

For SIL and PL

B10d value

Operating cyclesVAD VAG VAV VAH 1 10094360VAD VAG VAV VAH 2 8229021VAD VAG VAV VAH 3 6363683

Hardware fault tolerance (1 valve) HFT 0

Hardware fault tolerance (2 valves) HFT 1

Safe failure fraction SFF gt 90Fraction of undetected com-mon cause failures β ge 2

Max service life under operating conditions10 years after date of production plus max 12 year in stor-age prior to first use or once the given number of operating cycles has been reached depending on which is achieved firstThe devices are suitable for single-channel systems (HFT = 0) up to SIL 2PL d and up to SIL 3PL e when two re-dundant valves are installed in a double-channel architecture (HFT = 1) provided that the complete system complies with the requirements of EN 61508ISO 13849

For a glossary of terms see page 53 (Glossary)

Technical data

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 50

nop 1hnop 1a

sB10d

T10d aPFHD (1 VAx) 1h

PFHD (2 VAx) 1h

PFDavg (1 VAx)

PFDavg (2 VAx)

Technical data gt Safety-specific characteristic values for VAx 1 ndash 3

9 5 1 Determining the PFHD value the λD value and the MTTFd value

PFHD = λD = x nop= 1MTTFd

01B10d

PFDavg = x λD x 24 x 365 x T10d 12

Type

Cycle time

suitable for

suitable for

PFHD = Probability of dangerous failure (HDM = high de-mand mode) [1hour]PFDavg = Average probability of dangerous failure on de-mand (LDM = low demand mode)λD = Mean dangerous failure rate [1hour]MTTFd = Mean time to dangerous failure [hours]nop = Demand rate (mean number of annual operations) [1hour]

9 5 2 Calculating the PFHD and PFDavg

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 51

VAD VAG VAH VAV

H1

Rp frac14(NPT frac14)

H2

E

LF

F

H4

H3

B

VAxS VAxF

L2G

G

Technical data

9 6 Dimensions

Type

Connec-tion Dimensions

WeightRpNPT DN

L L2 E F G H1 H2 H3 H4 Bmm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch kg lbs

VAx 115 12 15 75 29 ndash ndash 75 29 15 06 ndash ndash 143 56 82 32 161 63 117 46 97 38 18 40VAH 115 12 15 75 29 ndash ndash 75 29 15 06 ndash ndash 143 56 100 39 161 63 135 53 97 38 2 44VAx 120 34 20 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 82 33 161 63 117 46 97 38 19 42VAH 120 34 20 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 100 39 161 63 135 53 97 38 21 46VAx 125 1 25 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 82 33 161 63 117 46 97 38 19 42VAH 125 1 25 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 100 39 161 63 135 53 97 38 21 46VAx 240 112 40 128 50 200 79 85 33 29 11 66 26 170 67 112 44 191 75 162 64 125 49 44 97VAH 240 112 40 128 50 200 79 85 33 29 11 66 26 170 67 132 52 191 75 182 72 125 49 47 104VAx 350 2 50 155 61 230 91 85 33 36 14 74 29 180 70 135 53 201 79 196 77 160 63 61 134VAH 350 2 50 155 61 230 91 85 33 36 14 74 29 180 70 156 61 201 79 217 85 160 63 64 141

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 52

10 Converting unitssee wwwadlatusorg

11 Maintenance cyclesAt least once per annum at least twice per annum for biologi-cally produced methaneIf the flow rate drops clean the strainer

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 53

12 Glossary12 1 Diagnostic coverage DCMeasure of the effectiveness of diagnostics which may be determined as the ratio between the failure rate of detected dangerous failures and the failure rate of total dangerous failuresNOTE Diagnostic coverage can exist for the whole or parts of a safety-related system For example diagnostic cover-age could exist for sensors andor logic system andor final elements Unit see EN ISO 13849-12008

12 2 Mode of operationHigh demand mode or continuous modeOperating mode where the frequency of demands for opera-tion made on a safety-related system is greater than one per year or greater than twice the proof-test frequencysee EN 61508-42008

12 3 CategoryClassification of the safety-related parts of a control system in respect of their resistance to faults and their subsequent behaviour in the fault condition and which is achieved by the structural arrangement of the parts fault detection andor by their reliability see EN ISO 13849-12008

12 4 Common cause failure CCFFailures of different items resulting from a single event where these failures are not consequences of each othersee EN ISO 13849-12008

12 5 Fraction of undetected common cause failures β Fraction of undetected failures of redundant components due to a single event whereby these failures are not based on mutual causesNOTE β is expressed as a fraction in the equations and as a percentage elsewheresee EN 61508-62010

12 6 B10d valueMean number of cycles until 10 of the components fail dan-gerouslysee EN ISO 13849-12008

12 7 T10d valueMean time until 10 of the components fail dangerouslysee EN ISO 13849-12008

12 8 Hardware fault tolerance HFTA hardware fault tolerance of N means that N + 1 is the mini-mum number of faults that could cause a loss of the safety functionsee IEC 61508-22010

12 9 Mean dangerous failure rate λD Mean rate of dangerous failures during operation time (T10d) Unit 1hsee EN ISO 13849-12008

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 54

12 10 Safe failure fraction SFFFraction of safe failures related to all failures which are as-sumed to appearsee EN 13611A22011

12 11 Probability of dangerous failure PFHD Value describing the likelihood of dangerous failure per hour of a component for high demand mode or continuous mode Unit 1hsee EN 13611A22011

12 12 Mean time to dangerous failure MTTFd Expectation of the mean time to dangerous failuresee EN ISO 13849-12008

12 13 Demand rate nop Mean number of annual operationssee EN ISO 13849-12008

12 14 Average probability of dangerous failure on demand PFDavg (LDM = 1 ndash 10 switching cyclesyear)Average probability of a dangerous failure of the safety function on demand (LDM = low demand mode)see EN 61508-6

Glossary

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415

Finally we are offering you the opportunity to assess this ldquoTechnical Information (TI)rdquo and to give us your opinion so that we can improve our documents further and suit them to your needs

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Remarks

(Adobe Reader 7 or higher required) wwwadobecom

Elster GmbH Postfach 2809 middot 49018 Osnabruumlck Strotheweg 1 middot 49504 Lotte (Buumlren) GermanyT +49 541 1214-0 F +49 541 1214-370 infokromschroedercomwwwkromschroedercom

The current addresses of our international agents are available on the Internetwwwkromschroederdeindexphpid=718ampL=1

We reserve the right to make technical modifications in the interests of progressCopyright copy 2015 Elster GmbH All rights reserved

Contact

Feedback

0325

0530

  • Pressure regulators with solenoid valve VAD VAG VAV VAH
  • Flow rate regulator VRH
  • Pressure regulators with double solenoid valve VCD VCG VCV VCH
  • Contents
  • 1 Application
    • 11 Examples of application
      • 111 Constant pressure control
      • 112 Constant pressure control with two gas solenoid valves
      • 113 Constant pressure control with max pressure switch
      • 114 Constant pressure control with non-controlled pilot gas outlet
      • 115 Modulating control
      • 116 Modulating control with two gas solenoid valves
      • 117 Modulating control with two gas solenoid valves and inlet pressure switch
      • 118 HighLow control
      • 119 Zero pressure control
      • 1110 Staged flow rate control
      • 1111 Continuous or staged flow rate control
      • 1112 Modulating control with variable airgas ratio control with gas solenoid valve
      • 1113 Modulating control in residential heat generation
          • 2 Certification
          • 3 Function
            • 31 VAD VAG VAH VRH VAV
              • 311 Pressure regulator for gas VAD
              • 312 Airgas ratio control VAG
              • 313 Flow rate regulators VAH VRH
              • 314 Variable airgas ratio control VAV
              • 315 Pressure regulator with gas solenoid valve VAxS position indicator with visual indicator
                • 32 Animation
                • 33 Connection diagram
                  • 331 VAx with M20 cable gland
                  • 332 VAx with plug
                  • 333 VAS with VADVAGVAHVAV with M20 cable gland
                  • 334 VAS with VADVAGVAHVAV with plug
                      • 4 Replacement possibilities for MODULINE pressure regulators with gas solenoid valve
                        • 41 GVS GVI GVIB GVR and GVRH are to be replaced by VAD VAG VAG+VAS VAH and VAV
                          • 5 Flow rate
                            • 51 Selection example for VAD
                              • 511 Calculate VAD
                                • 52 Selection example for VAG VAH VRH VAV
                                  • 521 CalculateVAG VxHVAV
                                    • 53 Selection example for zero governor VAGN
                                      • 531 Calculate VAGN
                                          • 6 Selection
                                            • 61 Selection table for pressure regulator with solenoid valve VAD
                                            • 62 Type code for VAD
                                            • 63 Selection table for airgas ratio control with solenoid valve VAG flow rate regulators VAH VRH
                                            • 64 Type code for VAG VAH VRH
                                            • 65 Selection table for variable airgas ratio control with solenoid valve VAV
                                            • 66 Type code for VAV
                                            • 67 Accessories
                                              • 7 Project planning information
                                                • 71 Installation
                                                  • 711 Installation position
                                                    • 72 Setting the low-fire rate on VAG VAH VRH VAV
                                                    • 73 Setting the high-fire rate on VAV
                                                      • 731 Calculation
                                                          • 8 Accessories
                                                            • 81 Gas pressure switch DGVC for VAx VRH
                                                            • 82 Gas pressure switch DGVCT for VAxT VRHT
                                                            • 83 Bypass valvepilot gas valve VAS 1
                                                              • 831 VAS 1 attached to VADVAGVAHVAV 1
                                                              • 832 VAS 1 attached to VADVAGVAHVAV 2 VADVAGVAHVAV 3
                                                              • 833 Flow rate
                                                                • 84 Bypass valvepilot gas valve VBY 8 for VADVAGVAHVAV 1
                                                                  • 841 Scope of delivery VBY 8I as bypass valve
                                                                  • 842 Scope of delivery VBY 8R as pilot gas valve
                                                                  • 843 Selection
                                                                  • 844 Type code
                                                                  • 845 Flow rate
                                                                  • 846 Technical data
                                                                    • 85 Tightness control TC 116V
                                                                    • 86 Pressure test points
                                                                    • 87 Cable gland set
                                                                    • 88 Seal set VA 1thinspndashthinsp3
                                                                    • 89 Differential pressure orifice
                                                                    • 810 Retaining frame
                                                                    • 811 Attachment block
                                                                    • 812 Gas control line
                                                                    • 813 Measuring orifice VMO
                                                                    • 814 Filter module VMF
                                                                    • 815 Fine-adjusting valve VMV
                                                                      • 9 Technical data
                                                                        • 91 VAD
                                                                        • 92 VAG
                                                                        • 93 VAH VRH
                                                                        • 94 VAV
                                                                        • 95 Safety-specific characteristic values for VAx 1thinspndashthinsp3
                                                                          • 951 Determining the PFHD value the λD value and the MTTFd value
                                                                          • 952 Calculating the PFHD and PFDavg
                                                                            • 96 Dimensions
                                                                              • 10 Converting units
                                                                              • 11 Maintenance cycles
                                                                              • 12 Glossary
                                                                                • 121 Diagnostic coverage DC
                                                                                • 122 Mode of operation
                                                                                • 123 Category
                                                                                • 124 Common cause failure CCF
                                                                                • 125 Fraction of undetected common cause failures β
                                                                                • 126 B10d value
                                                                                • 127 T10d value
                                                                                • 128 Hardware fault tolerance HFT
                                                                                • 129 Mean dangerous failure rate λD
                                                                                • 1210 Safe failure fraction SFF
                                                                                • 1211 Probability of dangerous failure PFHD
                                                                                • 1212 Mean time to dangerous failure MTTFd
                                                                                • 1213 Demand rate nop
                                                                                • 1214 Average probability of dangerous failure on demand PFDavg
                                                                                  • Feedback
                                                                                  • Contact
                                                                                      1. naechste_Seite 24
                                                                                      2. naechste Seite 18
                                                                                      3. naechste Seite 6
                                                                                      4. naechste Seite 16
                                                                                      5. naechste Seite 14
                                                                                      6. naechste Seite 25
                                                                                      7. naechste_Seite 11
                                                                                      8. naechste_Seite 17
                                                                                      9. fbArbeitspunkt_Min Ja
                                                                                      10. fbArbeitspunkt Ja
                                                                                      11. ftProgramm Standard-Programm
                                                                                      12. fz_kv
                                                                                      13. fz_pe 80
                                                                                      14. fz_pG 60
                                                                                      15. fzDelta_p_Soll 20
                                                                                      16. ftEinheit_Druck mbar
                                                                                      17. fatTyp [115]
                                                                                      18. fbArbeitspunkt_Min_2 Ja
                                                                                      19. fbArbeitspunkt_2 Ja
                                                                                      20. ftRegler_Typ VAG
                                                                                      21. ftProgramm_2 Standard-Programm
                                                                                      22. fz_kv_2
                                                                                      23. fatMedium [08]
                                                                                      24. fzDichte 08
                                                                                      25. ftEinheit_Dichte kgm3
                                                                                      26. fzV_Norm 30
                                                                                      27. ftEinheit_Volstrom m3h
                                                                                      28. fz_pe_2 80
                                                                                      29. fz_pG_2 60
                                                                                      30. fzDelta_p_Soll_2 20
                                                                                      31. ftEinheit_Druck2 [mbar]
                                                                                      32. ftEinheit_Geschw [ms]
                                                                                      33. fatTyp_2 [10954451150103322]
                                                                                      34. fbArbeitspunkt_Min_3 Ja
                                                                                      35. fbArbeitspunkt_3 Ja
                                                                                      36. ftProgramm_3 Standard-Programm
                                                                                      37. fz_kv_3
                                                                                      38. fz_pe_3 20
                                                                                      39. fz_pG_3 0
                                                                                      40. fzDelta_p_Soll_3 20
                                                                                      41. fatTyp_3 [123]
                                                                                      42. fatSchaltleistung [6363683]
                                                                                      43. fz_nop_Stunde 1
                                                                                      44. fz_nop_Jahr 8760
                                                                                      45. fzZyklus 3600
                                                                                      46. fzB10d 6363683
                                                                                      47. fzT10d 10
                                                                                      48. fzPFHd_1V 15714170551864384e-8
                                                                                      49. fzPFDavg_1V
                                                                                      50. ftGeeignet_1V PL d SIL 2
                                                                                      51. fzPFHd_2V 33505832253532625e-10
                                                                                      52. fzPFDavg_2V
                                                                                      53. ftGeeignet_2V PL e SIL 3
                                                                                      54. ftUebersicht Off
                                                                                      55. ftVerstaendlichkeit Off
                                                                                      56. ftFehlende_Info
                                                                                      57. ftUmfang Off
                                                                                      58. ftVerwendung_1 Off
                                                                                      59. ftVerwendung_2 Off
                                                                                      60. ftVerwendung_3 Off
                                                                                      61. ftVerwendung_4 Off
                                                                                      62. ftNavigation Off
                                                                                      63. ftTaetigkeitsbereich Off
                                                                                      64. ftBemerkung
                                                                                      65. Michael Rehkamp Elster Kromschroumlder>btnSenden
Page 11: VAD, VAG, VAV, VAH, VRH, VCD, VCG, VCV, VCH · PDF fileVAD, VAG, VAH, VAV, VRH, VCD, VCG, VCV, VCH · Edition 04.15 6 VAD VAD VAS 1 .1 Examples of application 1 .1 .1 Constant pressure

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 11

BVHM + MB7L

VMV

ECOMAX

VASN

BCU BZA

Prozess SteuerungProcess Control (PCC)

AKT

psa-

psa

pd-

VAH

1 1 10 Staged flow rate controlThis application shows the VAH on a self recuperative burnerThe pressure loss in the recuperator de-pends on the furnace or kiln temperature When the furnace or kiln temperature is increased (at a constant air supply pres-sure) the flow rate drops This change in the air flow rate is measured by the orifice and the VAH changes the gas volume accordinglyThe air index (lambda) can be set using the fine-adjusting valve VMV

Application gt Examples of application

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 12

M

IC + BVA

VMV

VMO

VAH

VAS

psa-psa

pd-

psa

psc

DGCmin

PZL

psa

psc

M

IC + BVA

VAS VAV

1 1 11 Continuous or staged flow rate controlThis application shows flow rate control for a radiant tube burner system with plug-in recuperator for air preheatingThere are temperature-dependent air pressure losses in the recuperator The ratio of gas pressure to air pressure does not remain constant The fluctuating air flow rate is measured at the measuring orifice VMO and the VAH controls the gas flow rate proportionallyThe air index (lambda) can be set using the fine-adjusting valve VMV

Application gt Examples of application

1 1 12 Modulating control with variable airgas ratio control with gas solenoid valveThe ratio of gas pressure to air pressure can be adjusted infinitely between 061 and 31 Pressure fluctuations in the com-bustion chamber can be compensated via the combustion chamber control pressure psc see page 15 (Function)

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 13

DGCmin

PZL

psa

psc

VAS VAV

1 1 13 Modulating control in residential heat generationThis application shows the variable airgas ratio control with solenoid valve VAV fitted to a modulating-controlled forced draught burnerThe combustion air volume is set via a butterfly valve for air or by adjusting the fan speed

Application gt Examples of application

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 14

2 CertificationCertificates ndash see Docuthek

VAD VAG VAV VAH certified to SIL and PL

For systems up to SIL 3 pursuant to EN 61508 and PL e pursu-ant to ISO 13849

VAD VAG VAV VAHEU certified pursuant to

ndash Gas Appliances Directive (2009142EC) in conjunction with EN 13611 EN 161 EN 88-1 EN 126 and EN 1854

Meets the requirements of thendash Low Voltage Directive (200695EC)ndash EMC Directive (2004108EC)

VAD VAG VAV VAH FM approved

Factory Mutual Research Class 7400 Process Control Valves Designed for applications pursuant to NFPA 85 and NFPA 86 www approvalguide com

VAD VAG ANSICSA approved

American National Standards InstituteCanadian Standards Association ndash ANSI Z21 21CSA 6 5 ANSI Z21 18 and CSA 6 3

wwwcsagrouporg ndash Class number 3371-83 (natural gas LPG) 3371-03 (natural gas propane)

VAD VAG VAV UL listed

Underwriters Laboratories ndash UL 429 ldquoElectrically operated valvesrdquo wwwulcom Tools (at the bottom of the page) Online Certifications Directory

VAD VAG VAV AGA approved

AGA

Australian Gas Association Approval No 5319 httpwww aga asn auproduct_directory

Eurasian Customs Union

The product VAD VAG VAV VAH VCD VCG VCV VCH meets the technical specifications of the Eurasian Customs Union (the Russian Federation Belarus Kazakhstan)

Approval does not apply for 100 V AC and 200 V AC

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 15

3 Function3 1 VAD VAG VAH VRH VAVThe regulator is closed when it is disconnected from the power supplyOpening connect the system to the electrical power supply (alternating voltage will be rectified) The blue LED lights up The coilrsquos magnetic field pulls the armature upwards and clears the supply nozzle for the gas inlet pressure pu The gas passes through the internal impulse tube to the adjustment diaphragm and then pushes the valve disc open The outlet pressure is applied to the servo diaphragm via the internal feedback

The servo regulator then maintains a set constant outlet pres-sure pd

3 1 1 Pressure regulator for gas VADThe nominal outlet pressure pd is defined by the control spring

Servoregulator

Valve

Armature

Valve disc

Adjustmentdiaphragm

Servodiaphragm

Internalfeedback

Controlspring

Solenoid coil

Supplynozzle

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 16

3 1 2 Airgas ratio control VAGThe airgas ratio control VAG controls the outlet pressure pd depending on the variable air control pressure psaThe ratio of gas pressure to air pressure remains constant 11 The VAG is suitable for a control range up to 101If the burner operates at low-fire rate the gasair mixture can be changed by adjusting the zero point spring ldquoNrdquo

Function

psa

pd

Zero point setting N zero point spring

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 17

Function

3 1 3 Flow rate regulators VAH VRHThe flow rate regulators VAH VRH control the gas flow rate depending on the variable air flow rate The ratio of gas flow rate to air flow rate remains constant If the burner operates at low-fire rate the gasair mixture can be changed by adjusting the zero point spring ldquoNrdquoIn addition flow rate regulator VAH is designed as a gas solenoid valve and shuts off the gas or air supply safely

psa

psa-

pd-

pdInternal feedback

Zero point setting N zero point spring

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 18

3 1 4 Variable airgas ratio control VAVThe servo regulator maintains a set constant outlet pressure pd The variable airgas ratio control VAV controls the outlet pressure pd depending on the variable air control pressure psa The ratio of gas pressure to air pressure remains constantThe settings N and V can be changed and read off from both sides of the unit using the adjusting screwsThe ratio of gas pressure to air pressure at low-fire rate can be changed by adjusting the zero point setting N By turning the adjusting screw ldquoNrdquo the force of the zero point spring and thus the zero point is changed by plusmn 15 mbar (06 WC) see page 34 (Project planning information)The high-fire rate is set by turning the adjusting screw ldquoVrdquo until the required flue gas values are achieved see page 34 (Project planning information) The ratio of gas pressure to air pressure can be set from 061 to 31The settings N and V influence each other and the adjustment process must be repeated if necessaryThe outlet pressure pd is applied to the servo diaphragm via the internal feedback The combustion chamber control pres-sure psc is transmitted to the space under the air and servo diaphragms via an impulse lineThe pressure differential psa - psc is achieved on the air diaphragm and the pressure differential pd - psc on the servo diaphragm This ensures that pressure fluctuations in the combustion cham-ber can be compensated The flue gas values remain constant in the case of fluctuations in the combustion chamber pressure (pd - psc) = (psa - psc) times V + N

Function

pdpsc

psa

Air diaphragm

Transmission ratio V

Zero point setting N zero point spring

Internalfeedback

Adjustment diaphragm

Servo diaphragm

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 19

1 COM

2 NO

3 NC

3 1 5 Pressure regulator with gas solenoid valve VAx S position indicator with visual indicatorOpening when the pressure regulator is opened the posi-tion indicator switches The visual indicator is activated The ldquoopenrdquo signal is marked in red The double valve seat opens to release the volume of gasClosing the pressure regulator VAx is disconnected from the voltage supply and the closing spring presses the double valve disc on to the valve seat The position indicator is actuated The visual indicator is white for ldquoclosedrdquoThe actuator cannot be rotated on a pressure regulator with a position indicator and a visual indicatorNOTE NFPA 86 ndash the following must be taken into account as soon as the capacity of the pilot or main burner exceeds 117 kW (400000 BTUh) safety shut-off valve VASS must be fitted with a proof of closure overtravel switch with a visual position indicator and the burner-side pressure regulator with gas solenoid valve VAxS must also be fitted with a position indicator with visual indicator The closed position can be verified using the proof of closure switch of the gas solenoid valve VASS

Function

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 20

3 2 AnimationThe interactive animation shows the function of the valVario controls VADVAGVAHVAVClick on the picture The animation can be controlled using the control bar at the bottom of the window (as on a DVD player) To play the animation you will need Adobe Reader 7 or a newer version If you do not have Adobe Reader on your system you can download it from the Internet

Go to wwwadobecom click on ldquoAdobe Readerrdquo at the bottom of the page and follow the instructionsIf the animation does not start to play you can download it from the document library (wwwdocuthekcom) as an inde-pendent application

Function

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 21

3 3 Connection diagramWiring to EN 60204-1Connection diagram for VAxS with position indicator ndash see page 19 (Pressure regulator with gas solenoid valve VAxS position indicator with visual indicator)

3 3 1 VAx with M20 cable gland

L1 (+)

N (ndash)

3 3 2 VAx with plug

1 = N (-)

2 = L1 (+)

3 3 3 VAS with VADVAGVAHVAV with M20 cable glandL1V1 (+)

N (-)

L1V2 (+)

3 3 4 VAS with VADVAGVAHVAV with plug2 = L1V1 (+)

1 = N (-)

3 = L1V2 (+)

Function

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 22

4 Replacement possibilities for MODULINE pressure regulators with gas solenoid valve4 1 GVS GVI GVIB GVR and GVRH are to be replaced by VAD VAG VAG+VAS VAH and VAV

Type TypeGVS Pressure regulator with gas solenoid valve Pressure regulator with gas solenoid valve VADGVI Airgas ratio control with gas solenoid valve Airgas ratio control with gas solenoid valve VAG

GVIB Airgas ratio control with gas solenoid valve and bypass valve

Airgas ratio control with gas solenoid valve and bypass valve VAG+VAS

GVRH Flow rate regulator with gas solenoid valve Flow rate regulator with gas solenoid valve VAHGVR Variable airgas ratio control with gas solenoid valve Variable airgas ratio control with solenoid valve VAV115125 Flange 38 Size 115

Size 125 on request

115125 Flange frac12 Size 115

Size 125 Size 1 DN 15 115

115125 Flange frac34 Size 115

Size 125 Size 1 DN 20 120

115125 Flange 1 Size 115

Size 125 Size 1 DN 25 125

232240 Flange 1 Size 232

Size 240 on request

232240 Flange 1frac12 Size 232

Size 240 Size 2 DN 40 240

350 Flange 1frac12 Size 350 on request350 Flange 2 Size 350 Size 3 DN 50 350ML MODULINE + Rp internal thread connection fl anges Rp internal thread RTML MODULINE + NPT internal thread connection fl anges NPT internal thread N01 pu max 100 mbar (15 psig) pu max 500 mbar (7 psig) 02 200 mbar (3 psig) 500 mbar (7 psig)

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 23

Replacement possibilities for MODULINE pressure regulators with gas solenoid valve gt GVS GVI GVIB GVR and GVRH are to be replaced by VAD VAG VAG+VAS VAH and VAV

ContinuationType Type

Quick opening Quick opening NF1 Control ratio 11 Control ratio 11 K Mains voltage 24 V DC Mains voltage 24 V DC K

ndash 100 V AC PQ 120 V AC 120 V AC Q

ndash 200 V AC YT 220240 V AC 230 V AC W3 Electrical connection via terminals Electrical connection via terminals 6 Electrical connection via socket Electrical connection via socket 9 Metal terminal connection box Electrical connection via terminals S Position indicator Position indicator with visual indicator SG Position indicator for 24 V Position indicator for 24 V with visual indicator GM Suitable for biologically produced methane Suitable for biologically produced methane

Pressure test point at the inlet Pressure test point at the inlet and outlet Outlet pressure pd -25

Outlet pressure pd 25 ndash 25 mbar (1 ndash 10 WC)

2 ndash 90 mbar (08 ndash 36 WC) 20 ndash 50 mbar (8 ndash 20 WC) -5035 ndash 100 mbar (14 ndash 40 WC) -100Standard seat A

ExampleGVS 350ML01T3with Rp 2 connection flanges

ExampleVAD 350RNW-100A

with test points

= standard = available Pressure test points may be attached at the left- andor right-hand side Position indicator with visual indicator can be attached at the left- or right-hand side

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 24

∆p [i

nch

WC]

Qn [SCFH]100 400 600 4000 60001000 200020 30 40 50 200 3006015 80

1

08

1

2

3

4

56

8

10

20

30

40

5060

80

100

200

∆p [m

bar]

5

8

3

20

10

30

40

80

60

300

400

50

04 06 1 2 3 4 5 808 10 20 30 402

03 60 100 200

100

200

500

1

3

2

04 06 08 1 2 3 4 5 6 8 10 20 30 40

04 06 08 1 2 3 4 5 6 8 10

200

80 10020 3003

03Qn [m3h]

02

50 60 80 100

40 50 60

VAD

115

B

VAD

120

AVA

D 12

5A

P1P2

VAD

240

AVA

D 35

0A

= natural gas (ρ = 080 kgm3) = propane (ρ = 201 kgm3) = air (ρ = 129 kgm3)

The characteristic flow rate curves have been meas-ured with the specified flanges and a fitted strainer If two or more valves are combined the pressure loss of each additional valve drops by approx 5

metric imperial

Enter densityFlow rate Qn

Inlet pressure pu

Outlet pressure pd

Product RV v

Pressure loss ∆p

∆pmin

5 Flow rate5 1 Selection example for VADNatural gas Flow rate Qmax = 30 m3h Inlet pressure pu = 80 mbar Outlet pressure pd = 60 mbarThe desired control ratio from high-fire to low-fire rate is RV = 101High fire ∆p = pu - pd = 20 mbar Point P1Low fire Point P2 Qmin = 26 m3h at ∆p = 20 mbar RV = Qmax Qmin = 1151

Point P1 and point P2 must be within the working range of a unit size We recommend that you select the smallest size to achieve the best control properties

5 1 1 Calculate VAD

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 25

∆p [i

nch

WC]

Qn [SCFH]100 400 600 4000 60001000 200020 30 40 50 200 3006015 80

1

08

1

2

3

4

56

8

10

20

30

40

5060

80

100

200

∆p [m

bar]

5

8

3

20

10

30

40

80

60

300

400

50

04 06 1 2 3 4 5 808 10 20 30 402

03 60 100 200

100

200

500

1

3

2

04 06 08 1 2 3 4 5 6 8 10 20 30 40

04 06 08 1 2 3 4 5 6 8 10

200

80 10020 3003

03Qn [m3h]

02

50 60 80 100

40 50 60

= pd min lt 5 mbar

VAG

VxH

VAV

115

BVA

GV

xHV

AV 12

0A

VAG

VxH

VAV

125

A

P1

P2

VAG

VxH

VAV

240

AVA

GV

xHV

AV 3

50A

= natural gas (ρ = 080 kgm3) = propane (ρ = 201 kgm3) = air (ρ = 129 kgm3)

The characteristic flow rate curves have been meas-ured with the specified flanges and a fitted strainer If two or more valves are combined the pressure loss of each additional valve drops by approx 5

5 2 Selection example for VAG VAH VRH VAV Natural gas Flow rate Qmax = 30 m3h Inlet pressure pu = 80 mbar Outlet pressure pd max VAG = 60 mbarThe desired control ratio from high-fire to low-fire rate is RV = 101High fire ∆p = pu - pd max = 20 mbar Point P1Low fire pd min = pd max RV2 = 06 mbar Qmin = Qmax RV = 3 m3h ∆p = pu - pd min = 794 mbar Point P2 select VAG 120APoint P1 and point P2 must be within the working range of a unit size We recommend that you select the smallest size to achieve the best control properties

metric imperial

Enter densityFlow rate Qn

Inlet pressure pu

Outlet pressure pd

Product RV v

5 2 1 Calculate VAG VxH VAV

Pressure loss ∆p

∆pmin

Flow rate

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 26

∆p [i

nch

WC]

Qn [SCFH]100 400 600 4000 60001000 200020 30 40 50 200 3006015 80

1

08

1

2

3

4

56

8

10

20

30

40

5060

80

100

200

∆p [m

bar]

5

8

3

20

10

30

40

80

60

300

400

50

04 06 2 3 4 5 808 10 20 30 402

03 60 100 200

100

200

500

1

3

2

04 06 08 1 2 3 4 5 6 8 10 20 30 40

04 06 08 1 2 3 4 5 6 8 10

200

80 10020 3003

03Qn [m3h]

02

50 60 80 100

40 50 60

VAG

115

N

P1VAG

125

N

VAG

120

N

VAG

240

NP2

VAG

350

N

= natural gas (ρ = 080 kgm3) = propane (ρ = 201 kgm3) = air (ρ = 129 kgm3)

The characteristic flow rate curves have been meas-ured with the specified flanges and a fitted strainer If two or more valves are combined the pressure loss of each additional valve drops by approx 5

5 3 Selection example for zero governor VAG NNatural gas Flow rate Qmax = 30 m3h Inlet pressure pu = 20 mbar Outlet pressure pd = 0 mbar (atmospheric pressure)The desired control ratio from high-fire to low-fire rate is RV = 101High fire ∆p = pu - pd max = 20 mbar Point P1Low fire Point P2 Qmin = 24 m3h at ∆p = 20 mbar RV = Qmax Qmin = 1231Point P1 and point P2 must be within the working range of a unit size We recommend that you select the smallest size to achieve the best control properties

metric imperial

Enter densityFlow rate Qn

Inlet pressure pu

Outlet pressure pd

Product RV

5 3 1 Calculate VAG N

Pressure loss ∆p

∆pmin

Flow rate

v

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 27

6 Selection6 1 Selection table for pressure regulator with solenoid valve VAD

Accessories right Accessories left

Type1) T R N F N K P Q Y W S2) G2) R2) L2) M20

cab

le g

land

Plug

with

soc

ket

Plug

with

out s

ocke

t

-25-50 -100 A B Scre

w p

lug

Pres

sure

test

poi

nt

DG

17V

C 3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

Scre

w p

lug

Pres

sure

test

poi

nt

DG

17V

C 3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

VAD 115

VAD 120

VAD 125

VAD 240

VAD 350

= standard = available1) The following nominal inlet fl ange diameters are also available size 1 with nominal diameter DN 10 size 2 with nominal diameters DN 25 DN 32 and DN 50 size 3 with nominal diameters DN 40 and DN 652) Position indicator and bypasspilot gas valve cannot be fi tted together on the same side3) Specify the test point for inlet pressure pu or outlet pressure pdHelp for selecting the pressure regulator VAD can be found on the ProFi DVD wwwkromschroedercom Products DVD Product fi nder ldquoProFirdquo

Order exampleVAD 240RNW-100A

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 28

Selection

6 2 Type code for VADCode DescriptionVAD Pressure regulator with solenoid valve1 ndash 3 SizeT T-product10 ndash 65 Nominal inlet and outlet diameterRNF

Rp internal threadNPT internal thread

ISO fl angeN Quick opening quick closingKPQYW

Mains voltage 24 V DCMains voltage 100 V AC 5060 HzMains voltage 120 V AC 5060 HzMains voltage 200 V AC 5060 HzMains voltage 230 V AC 5060 Hz

SG

Position indicator with visual indicatorPosition indicator for 24 V with visual indicator

RL

Viewed from the right (in the direction of fl ow)Viewed from the left (in the direction of fl ow)

-25-50-100

Outlet pressure pd 25 ndash 25 mbar20 ndash 50 mbar

35 ndash 100 mbarAB

Standard valve seatReduced valve seat

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 29

Selection

6 3 Selection table for airgas ratio control with solenoid valve VAG flow rate regulators VAH VRH

Type1) T R N F N K P Q Y W S2) G2) R2) L2) M20

cab

le g

land

Plug

with

soc

ket

Plug

with

out s

ocke

t

A B E K A N Scre

w p

lug

Pres

sure

test

poi

ntD

G 1

7VC

3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

Scre

w p

lug

Pres

sure

test

poi

ntD

G 1

7VC

3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

VAG 115 VAG 120 VAG 125 VAG 240 VAG 350

VAH 115 VAH 120 VAH 125 VAH 240 VAH 350

VRH 115 VRH 120 VRH 125 VRH 240 VRH 350

= standard = available1) The following nominal inlet fl ange diameters are also available size 1 with nominal diameter DN 10 size 2 with nominal di-

ameters DN 25 DN 32 and DN 50 size 3 with nominal diameters DN 40 and DN 652) Position indicator and bypasspilot gas valve cannot be fi tted together on the same side3) Specify the test point for inlet pressure pu or outlet pressure pdHelp for selecting the regulators can be found on the ProFi DVD wwwkromschroedercom Products DVD Product fi nder ldquoProFirdquo

Order exampleVAG 240RNWAE

Accessories right Accessories left

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 30

Selection

6 4 Type code for VAG VAH VRHCode DescriptionVAGVAHVRH

Airgas ratio control with solenoid valveFlow rate regulator with solenoid valve

Flow rate regulator1 ndash 3 SizeT T-product15 ndash 50 Nominal inlet and outlet diameterRNF

Rp internal threadNPT internal thread

ISO fl angeN1) Quick opening quick closingK1)

P1)

Q1)

Y1)

W1)

Mains voltage 24 V DCMains voltage 100 V AC 5060 HzMains voltage 120 V AC 5060 HzMains voltage 200 V AC 5060 HzMains voltage 230 V AC 5060 Hz

S1)

G1)Position indicator with visual indicator

Position indicator for 24 V with visual indicatorRL

Viewed from the right (in the direction of fl ow)Viewed from the left (in the direction of fl ow)

AB

Standard valve seatReduced valve seat

EKAN

Connection kit for air control pressure psaVAG VAH VRH compression fi tting

VAG plastic hose couplingVAG VAH VRH NPT 18 adapter

VAG zero governor1) Only available for VAG VAV VAH

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 31

6 5 Selection table for variable airgas ratio control with solenoid valve VAVAccessories right Accessories left

Type1) T R N F N K P Q Y W S2) G2) R2) L2) M20

cab

le g

land

Plug

with

soc

ket

Plug

with

out s

ocke

t

A B E K A Scre

w p

lug

Pres

sure

test

poi

ntD

G 1

7VC

3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

Scre

w p

lug

Pres

sure

test

poi

ntD

G 1

7VC

3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

VAV 115

VAV 120

VAV 125

VAV 240

VAV 350

= standard = available1) The following nominal inlet fl ange diameters are also available size 1 with nominal diameter DN 10 size 2 with nominal diameters DN 25 DN 32 and DN 50 size 3 with nominal diameters DN 40 and DN 652) Position indicator and bypasspilot gas valve cannot be fi tted together on the same side3) Specify the test point for inlet pressure pu or outlet pressure pdHelp for selecting the variable airgas ratio control VAV can be found on the ProFi DVD wwwkromschroedercom

Products DVD Product fi nder ldquoProFirdquo

Order exampleVAV 240RNWAK

Selection

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 32

Selection

6 6 Type code for VAVCode DescriptionVAV Variable airgas ratio control with solenoid valve1 ndash 3 SizeT T-product15 ndash 50 Nominal inlet and outlet diameterRNF

Rp internal threadNPT internal thread

ISO fl angeN Quick opening quick closingKPQYW

Mains voltage 24 V DCMains voltage 100 V AC 5060 HzMains voltage 120 V AC 5060 HzMains voltage 200 V AC 5060 HzMains voltage 230 V AC 5060 Hz

SG

Position indicator with visual indicatorPosition indicator for 24 V with visual indicator

RL

Viewed from the right (in the direction of fl ow)Viewed from the left (in the direction of fl ow)

AB

Standard valve seatReduced valve seat

EKA

Connection kit for air control pressure psa and combus-tion chamber control pressure psc

compression fi ttingplastic hose coupling

NPT 18 adapter

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 33

Selection

6 7 AccessoriesModularly configurable withndash Screw plugsndash Pressure test pointsndash Pressure switch DGVC for inlet

andor outlet pressurendash Tightness control TCndash Bypasspilot gas valve VBY 8 for

size 1ndash Bypasspilot gas valve VAS 1For further information see page 37 (Accessories)

Position indicator

Plug with socket

Plug

Screwplugs

Pressuretest points

Pressure switch DGC Tightness

control TC

Bypasspilot gas valve VBY 8 for size 1

Bypasspilot gas valve VAS 1

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 34

7 Project planning informationDo not store or install the unit in the open airThe inlet pressure pu and the outlet pressure pd can be meas-ured on both sides of the valve body To increase the control accuracy an external impulse line can be connected instead of the pressure test point pd

VAD

pu

pd

(psa)

VAGpd

pu

psa

psa

VAD measurement point for the gas outlet pressure pd on the regulator body A combustion chamber control line (psc) can be connected to connection psa for maintaining a constant burner capacityVAG additional measurement point for the air control pressure psa on the regulator body

VAV

psapsc

pu

pd

VAH VRH

pu

pd-

pdpsa-

psa

VAV measurement point for the outlet pressure pd on the regulator bodyVAH additional measurement points for the outlet pressure pd- and the air control pressure psapsa- on the regulator body

7 1 Installation

GFK

VAGVAH

GFKVAD

Sealing material and thread cuttings must not be allowed to get into the valve housing Install a filter upstream of every system

gt20 mmgt0 79

The unit must not be in contact with masonry Minimum clear-ance 20 mm (079 inches)Ensure that there is sufficient space for installation and ad-justment

le +100 degCle +212 degF

The solenoid body heats up during operation ndash depending on ambient temperature (max 60degC140degF) and intrinsic heating (approx 40degC104degF)

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 35

In the case of double solenoid valves the position of the con-nection box can only be changed by removing the actuator and reinstalling it offset by 90deg or 180deg

If more than three valVario controls are installed in line the controls must be supported

The seals in some gas compression fittings are approved for temperatures of up to 70degC (158degF) This temperature limit will not be exceeded if the flow through the pipe is at least 1 msup3h (3531 SCFH) of gas and the maximum ambient temperature is 50degC (122degF)

7 1 1 Installation position

pu ge 80 mbar(80 hPa32 WC)

VAD VAG VAH VRH VAV

In humid environments black solenoid actuator in the vertical upright position only

VAD VAG VAH VRH black solenoid actuator in the vertical upright position or tilted up to the horizontal not upside downVAG VAH horizontal position only if pu ge 80 mbar (32 WC))VAV installation in the vertical position only black solenoid actuator in the vertical upright positionTo ensure that the airgas ratio control VAG the flow rate regulator VAH VRH or the variable airgas ratio control VAV can react quickly when the load is changed the impulse line for the air control pressure psa and for VAV the impulse line for the combustion chamber control pressure psc should be kept as short as possible The tube internal diameter for the impulse line must always be ge 39 mm (015)

VAH VRHIt is not permitted to install a gas solenoid valve VAS down-stream of flow rate regulator VAH VRH and upstream of fine-adjusting valve VMV The VAS would no longer be able to perform its function as a second safety valve if installed in the above-mentioned position

M

VMV

VAH

VASVAS

pd-

psa-psa

VMV

VAH pd-

psa-psa

The measuring orifice in the air line for impulse lines psa and psa- must always be installed downstream of the air control valve

Project planning information gt Installation

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 36

VAVThe impulse line for the combustion chamber control pres-sure psc must be fitted so that no condensation can enter the pressure regulator but rather flows back into the combustion chamber

7 2 Setting the low-fire rate on VAG VAH VRH VAV

-10 +05-05

ndash

+1

-15

mbar

+15

06

1 152

3

N V

+ +ndash

+30 -15+15

ndash

-3

+5

mbar

-5

N

+

VAG VAH VRH VAV

If the burner operates at low-fire rate the gasair mixture can be changed using the parallel shift of the characteristic curve by turning the adjusting screw ldquoNrdquoAdjusting range at low fire VAG VAH VRH -5 to +5 mbar (-195 to +195 WC) VAV -15 to +15 mbar (-06 to +06 WC)

7 3 Setting the high-fire rate on VAVTo set the high-fire rate the transmission ratio is changed us-ing the adjusting screw ldquoVrdquo until the required flue gas values are achievedTransmission ratio V = pdpsa = 061 to 31The settings N and V can influence each other and must be repeated if necessary

+N+V

-V

-N

VAV

psa [mbar]

p d [m

bar]

7 3 1 CalculationWith no connection to the combustion chamber control pres-sure psc pd = V times psa + NWith connection to the combustion chamber control pressure psc (pd - psc) = V times (psa - psc) + N

Project planning information

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 37

pu pd

21579

4836

085310

189

142

8 Accessories8 1 Gas pressure switch DG VC for VAx VRHType Adjusting range [mbar]DG 17VC 2 to 17DG 40VC 5 to 40DG 110VC 30 to 110DG 300VC 100 to 300

Scope of delivery 1 times pressure switch for gas 2 times retaining screws 2 times sealing rings

8 2 Gas pressure switch DG VCT for VAx T VRH TType Adjusting range [WC]DG 17VCT 08 to 68DG 40VCT 2 to 16DG 110VCT 12 to 44DG 300VCT 40 to 120

Scope of delivery 1 times gas pressure switch with AWG 18 connection wires 2 times retaining screws 2 times sealing ringsMonitoring the inlet pressure pu the electrical plug of the pressure switch for gas points towards the inlet flangeMonitoring the outlet pressure pd the electrical plug of the pressure switch for gas points towards the outlet flange

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 38

A BC

D

FE

ACD

F

B

E

8 3 Bypass valvepilot gas valve VAS 18 3 1 VAS 1 attached to VADVAGVAHVAV 1Scope of delivery A 1 times bypasspilot gas valve VAS 1 B 4 times O-rings C 4 times double nuts D 4 times connection parts E 1 times mounting aidBypass valve VAS 1 F 2 times connection pipes if the bypass valve has a blind flange

at the outlet sidePilot gas valve VAS 1 F 1 times connection pipe 1 times sealing plug if the pilot gas valve

has a threaded flange at the outlet side

Accessories

8 3 2 VAS 1 attached to VADVAGVAHVAV 2 VADVAGVAHVAV 3Scope of delivery A 1 times bypasspilot gas valve VAS 1 B 4 times O-rings C 4 times spacer sleeves D 4 times connection parts E 1 times mounting aidBypass valve VAS 1 F 2 times connection pipes if the bypass valve has a blind flange

at the outlet sidePilot gas valve VAS 1 F 1 times connection pipe 1 times sealing plug if the pilot gas valve

has a threaded flange at the outlet side

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 39

2

3

456

810

20

30

405060

80100

∆p [m

bar]

005 01 02 03 05 08 1 2 3 4 51

3

2

Qn [m3h]

1

01

02

03

0405

08

003

002

6 8 10

005 01 02 03 05 08 1 2 3 4 5003 6 8 10

20

005 01 02 03 05 08 1 2 3 4 5003 6 8 10 20

30

∆p [i

nch

WC]

1

2

3

456

810

20

30

40

04

004

006

00801

02

03

0506

08

Qn [SCFH]10 40 60 100 200 3001 500 10002 3 4 5

120 306 8

21 3 4 5 6 7 8 910

8 3 3 Flow rate

The characteristic flow rate curves have been measured for bypass valve VAS 1 with connection pipe diameter 1 to 10 mm (004 to 04) and for the pilot gas valve with 10 mm (04) connection pipe

Bypass valve connection pipe diameter [mm]

Pilo

t gas

val

ve 1

0 m

m (0

4)

conn

ectio

n pi

pe d

iam

eter

Accessories gt Bypass valvepilot gas valve VAS 1

= natural gas (ρ = 080 kgm3) = propane (ρ = 201 kgm3) = air (ρ = 129 kgm3)

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 40

Accessories

8 4 Bypass valvepilot gas valve VBY 8 for VADVAGVAHVAV 1

B

C

AVBY 8

VAx 1

55

(217)40(157)

70 (276)

80(315)

Rp frac14(pilot gas valve)

For mounting on VAD VAG VAH VAV 1 and double solenoid valve VCD VCG VCH VCV 1

8 4 1 Scope of delivery VBY 8I as bypass valveA 1 times bypass valve VBY 8IB 2 times retaining screws with 4 times O-rings both retaining screws

have a bypass orificeC 1 times grease for o-rings

8 4 2 Scope of delivery VBY 8R as pilot gas valveA 1 times pilot gas valve VBY 8RB 2 times retaining screws with 5 x O-rings one retaining screw

has a bypass orifice (2 x O-rings) the other does not (3 x O-rings)

C 1 times grease for O-rings

8 4 3 SelectionType I R W Q K 6L -R -L E B D 05

VBY 8

Order exampleVBY 8RW6L-LED

8 4 4 Type codeCode DescriptionVBY Gas solenoid valve8 Nominal sizeIR

For internal gas pick-up as bypass valveFor external gas pick-up as pilot gas valve

KQW

Mains voltage 24 V DC Mains voltage 120 V AC 5060 HzMains voltage 230 V AC 5060 Hz

6L Electrical connection via plug and socket with LED-R-L

Attachment side of main valve right-hand sideAttachment side of main valve left-hand side

EB

Attached to the VAxEnclosed (separate packing unit)

05D

Nozzle diameter = 05 mm (002)Flow adjustment

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 41

2

01

02

03

05

081

3

456

810

20

30

405060

80100

∆p [m

bar]

1

3

201 02 03 05 1 2 3001 003 4

Qn [m3h]

02 03 05 1 2

01 02 05

002 006

002

002 006 1

0010006 005 01

001

0003

0006 2 3

VBY 8DVBY 805

∆p [i

nch

WC]

1

2

3

456

810

20

30

40

040506

08

1

Qn [SCFH]10 40 60 1005 2081 2 30402

01

02

03

004005006

008

Adjusting range

8 4 5 Flow rateVBY 8 D

+

-

The flow rate can be set by turning the flow rate restrictor (4 mm016 Allen screw) frac14 of a turn Flow rate 10 to 100

VBY 8 05The flow is routed through a 05 mm (002) nozzle and thus has a fixed characteristic flow rate curve Adjustment is not possible

8 4 6 Technical dataInlet pressure pu max 500 mbar (7 psig)Ambient temperature 0 to +60degC (32 to 140degF) no condensation permittedStorage temperature 0 to +40degC (32 to 104degF) no condensation permittedPower consumption 24 V = 8 W 120 V = 8 W 230 V = 95 WEnclosure IP 54

Accessories gt Bypass valvepilot gas valve VBY 8 for VADVAGVAHVAV 1

= natural gas (ρ = 080 kgm3) = propane (ρ = 201 kgm3) = air (ρ = 129 kgm3)

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 42

TC 116VB C

56(22)

49(193)

27(106)

A

A

VCx 1 VCx 2VCx 3

8 5 Tightness control TC 116Vfor VAx 1 ndash 3An adapter plate is required to attach the tightness control to the right- or left-hand side of the pressure regulator with gas solenoid valveScope of delivery A 1 times adapter plate B 2 times O-rings C 2 times retaining screwsFor attachment to left-hand side Order No 74922391 right-hand side Order No 74921995

8 6 Pressure test pointsTest points to check the inlet pressure pu and outlet pressure pdScope of delivery 1 x pressure test points with 1 x profiled sealing rings Order No 74923390

8 7 Cable gland setWhen wiring a double solenoid valve with pressure regula-tor VCx the connection boxes are to be connected using a cable gland setThe cable gland set can only be used if the connection boxes are at the same height and on the same side and if both valves are equipped either with or without a proof of closure switchVA 1 Order No 74921985 VA 2 Order No 74921986 VA 3 Order No 74921987

Accessories

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 43

A B

D

C

Accessories

8 9 Differential pressure orifice

Size PipeDN

Differential pressure orifi cewith outlet dia

1 15 17 mm 0671 20 25 mm 0981 25 30 mm 1182 40 46 mm 1813 50 58 mm 228

If pressure regulator VADVAGVAV 1 is retrofitted upstream of gas solenoid valve VAS 1 a DN 25 differential pressure orifice with outlet opening d = 30 mm (118) must be inserted at the outlet of the pressure regulatorIn the case of pressure regulator VAx 115 or VAx 120 the DN 25 differential pressure orifice must be ordered separately and retrofitted Order No 74922240

8 8 Seal set VA 1 ndash 3VA 1 Order No 74921988 VA 2 Order No 74921989 VA 3 Order No 74921990Scope of deliveryA 1 times double block seal B 2 times O-rings (flange) C 2 times O-rings (pressure switch) for pressure test pointscrew plug D 2 times sealing rings (flat sealing) and 2 times profiled sealing rings

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 44

BA

C

pd-

8 11 Attachment blockFor locked installation of pressure gauge and other acces-soriesScope of delivery A 1 times attachment block B 2 times self-tapping screws for installation C 2 times O-rings

Accessories

8 10 Retaining frameIn the event that a pressure regulator VAx is installed at a later point upstream of a gas solenoid valve VAS a measur-ing orifice VMO or a fine-adjusting valve VMV the retaining frame must be fitted at the inlet of the second device in order to fasten the differential pressure orifice at the regulator outlet Order the retaining frame separatelyRetaining frame for Size 1 Order No 74923029 Size 2 Order No 74923030 Size 3 Order No 74923031

8 12 Gas control lineFine-adjusting valve VMV can be installed on the flow rate regulator VAH for fine adjustment of the gas flow rateThe gas control line for gas outlet pressure pd- is available with 2 18 compression fittingsSize 1 Order No 74924458 Size 2 Order No 74924459

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 45

8 13 Measuring orifice VMOThe measuring orifice VMO is designed to reduce the gas and air flow rates and is installed downstream of the valVario control The measuring orifice is available with Rp internal thread (NPT internal thread) or flange to ISO 7005See wwwdocuthekcom Elster Kromschroumlder Krom-schroumlder LBE Products 03 Valves and butterfly valves valVario accessories Type of document Technical Informa-tion VMO

Accessories

8 14 Filter module VMFUsing the filter module VMF the gas flow upstream of the gas solenoid valve VAS and the airgas ratio control is cleaned The filter module is available with Rp internal thread (NPT internal thread) or flange to ISO 7005 and can also be supplied with fitted pressure switch as an optionSee wwwdocuthekcom Elster Kromschroumlder Krom-schroumlder LBE Products 03 Valves and butterfly valves valVario accessories Type of document Technical Informa-tion VMF

8 15 Fine-adjusting valve VMVThe flow rate is set using the fine-adjusting valve VMV The fine-adjusting valve is available with Rp internal thread (NPT internal thread) or flange to ISO 7005See wwwdocuthekcom Elster Kromschroumlder Krom-schroumlder LBE Products 03 Valves and butterfly valves valVario accessories Type of document Technical Infor-mation VMV

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 46

9 Technical dataGas types natural gas LPG (gaseous) biologically produced methane (max 01 -by-vol H2S) or clean air other gases on request The gas must be clean and dry in all temperature conditions and must not contain condensateCE and FM approved UL listed max inlet pressure pu 10 ndash 500 mbar (4 ndash 200 WC) FM approved (230 V AC 120 V AC 24 V DC) non opera-tional pressure 700 mbar (10 psig)ANSICSA approved (230 V AC 120 V AC 24 V DC) up to 350 mbar (5 psig)Opening time of the solenoid valve quick opening le 05 s Closing time quick closing lt 1 sMedium and ambient temperatures -20 to +60degC (-4 to +140degF) no condensation permittedStorage temperature -20 to +40degC (-4 to +104degF)Enclosure IP 65Valve housing aluminium valve seal NBRConnection flanges with internal thread Rp to ISO 7-1 NPT to ANSIASMESafety valve Class A to EN 161 Factory Mutual Research Class 7400 Process Control Valves (230 V AC 120 V AC 24 V DC) ANSI Z2121 and CSA 65 ANSI Z2118 and CSA 63Control class A to EN 88-1Control range up to 101

Mains voltage 230 V AC +10-15 5060 Hz 200 V AC +10-15 5060 Hz 120 V AC +10-15 5060 Hz 100 V AC +10-15 5060 Hz 24 V DC plusmn20Duty cycle 100Power factor of the solenoid coil cos φ = 09Power consumption

Type Voltage Power

VAx 1

24 V DC 25 W ndash100 V AC 25 W (26 VA)120 V AC 25 W (26 VA)200 V AC 25 W (26 VA)230 V AC 25 W (26 VA)

VAx 2 VAx 3

24 V DC 36 W ndash100 V AC 36 W (40 VA)120 V AC 40 W (44 VA)200 V AC 40 W (44 VA)230 V AC 40 W (44 VA)

VBY24 V DC 8 W ndash

120 V AC 8 W ndash230 V AC 95 W ndash

Cable gland M20 times 15Electrical connection cable with max 25 mm2 (AWG 12) or plug with socket to EN 175301-803

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 47

Position indicator contact rating

Type Voltage Min current(resistive load)

Max current(resistive load)

VAxS VCxS 12 ndash 250 V AC 5060 Hz 100 mA 3 AVAxG VCxG 12 ndash 30 V DC 2 mA 01 A

Position indicator switching frequency max 5 times per minute

Switching current [A]

Switching cyclescos φ = 1 cos φ = 06

01 500000 50000005 300000 250000

1 200000 1000003 100000 ndash

Limited to max 200000 cycles for heating systems

9 1 VADOutlet pressure pd VAD-25 25 ndash 25 mbar (1 ndash 10 WC) VAD-50 20 ndash 50 mbar (8 ndash 20 WC) VAD-100 35 ndash 100 mbar (14 ndash 40 WC)Combustion chamber control pressure psc (connection psa)

-20 to +20 mbar (-78 to +78 WC)

VAD

pu

pd

(psa)

9 2 VAGOutlet pressure pd 05 ndash 100 mbar (02 ndash 40 WC)Air control pressure psa 05 ndash 100 mbar (02 ndash 40 WC)

Adjusting range at low fire plusmn5 mbar (plusmn2 WC)Transmission ratio of gas to air 11The inlet pressure must always be higher than the air control pressure psa + pressure loss ∆p + 5 mbar (2 WC)

VAGpd

pu

psa

psa

VAGK 1 x 18 coupling for plastic hose (internal dia 39 mm (015) external dia 61 mm (024)) or VAGE 1 x 18 compression fitting for 6 times 1 tube or VAGA 1 x NPT 18 adapter or VAGN zero governor with breathing orifice

9 3 VAH VRHAir control pressure psa 06 ndash 100 mbar (024 ndash 40 WC) Differential air pressure ∆psa (psa - psa-) 06 ndash 50 mbar (024 ndash 197 WC) Differential gas pressure ∆pd (pd - pd-) 06 ndash 50 mbar (024 ndash 197 WC)Transmission ratio of gas to air 11The inlet pressure must always be higher than the differen-tial air pressure ∆psa + pressure loss ∆p + max gas pres-sure on burner + 5 mbar (2 WC)Adjusting range at low fire plusmn5 mbar (plusmn2 WC)

Technical data

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 48

VAHVRH

pd-

pu

psa-

psa

Connection of the air control pressure psaVAHE VRHE 3 x 18 compression fitting for 6 times 1 tube or VAHA VRHA 3 x NPT 18 adapter

9 4 VAVOutlet pressure pd 05 ndash 30 mbar (02 ndash 117 WC)Air control pressure psa 04 ndash 30 mbar (015 ndash 117 WC)Combustion chamber control pressure psc

-20 to +20 mbar (-78 to +78 WC)Min control pressure differential psa - psc 04 mbar (015 WC)Min pressure differential pd - psc 05 mbar (02 WC)Adjusting range at low fire plusmn15 mbar (plusmn06 WC)Transmission ratio of gas to air 061 to 31The inlet pressure pu must always be higher than the air control pressure psa times transmission ratio V + pressure loss ∆p + 15 mbar (06 WC)

pu

pd psapsc

VAV

VAVK 2 x plastic hose couplings (internal dia 39 mm (015) external dia 61 mm (024)) or VAVE 2 x 18 compression fitting for 6 times 1 tube or VAVA 2 x NPT 18 adapter

Technical data

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 49

9 5 Safety-specific characteristic values for VAx 1 ndash 3For SILSuitable for Safety Integrity Level SIL 1 2 3

Diagnostic coverage DC 0

Type of subsystem Type A to EN 61508-2 74312

Operating mode High demand mode pursu-ant to EN 61508-4 3512

For PLSuitable for Performance Level PL a b c d e

Category B 1 2 3 4Common cause failure CCF gt 65Application of essential safety requirements Satisfied

Application of tried-and-tested safety requirements Satisfied

For SIL and PL

B10d value

Operating cyclesVAD VAG VAV VAH 1 10094360VAD VAG VAV VAH 2 8229021VAD VAG VAV VAH 3 6363683

Hardware fault tolerance (1 valve) HFT 0

Hardware fault tolerance (2 valves) HFT 1

Safe failure fraction SFF gt 90Fraction of undetected com-mon cause failures β ge 2

Max service life under operating conditions10 years after date of production plus max 12 year in stor-age prior to first use or once the given number of operating cycles has been reached depending on which is achieved firstThe devices are suitable for single-channel systems (HFT = 0) up to SIL 2PL d and up to SIL 3PL e when two re-dundant valves are installed in a double-channel architecture (HFT = 1) provided that the complete system complies with the requirements of EN 61508ISO 13849

For a glossary of terms see page 53 (Glossary)

Technical data

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 50

nop 1hnop 1a

sB10d

T10d aPFHD (1 VAx) 1h

PFHD (2 VAx) 1h

PFDavg (1 VAx)

PFDavg (2 VAx)

Technical data gt Safety-specific characteristic values for VAx 1 ndash 3

9 5 1 Determining the PFHD value the λD value and the MTTFd value

PFHD = λD = x nop= 1MTTFd

01B10d

PFDavg = x λD x 24 x 365 x T10d 12

Type

Cycle time

suitable for

suitable for

PFHD = Probability of dangerous failure (HDM = high de-mand mode) [1hour]PFDavg = Average probability of dangerous failure on de-mand (LDM = low demand mode)λD = Mean dangerous failure rate [1hour]MTTFd = Mean time to dangerous failure [hours]nop = Demand rate (mean number of annual operations) [1hour]

9 5 2 Calculating the PFHD and PFDavg

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 51

VAD VAG VAH VAV

H1

Rp frac14(NPT frac14)

H2

E

LF

F

H4

H3

B

VAxS VAxF

L2G

G

Technical data

9 6 Dimensions

Type

Connec-tion Dimensions

WeightRpNPT DN

L L2 E F G H1 H2 H3 H4 Bmm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch kg lbs

VAx 115 12 15 75 29 ndash ndash 75 29 15 06 ndash ndash 143 56 82 32 161 63 117 46 97 38 18 40VAH 115 12 15 75 29 ndash ndash 75 29 15 06 ndash ndash 143 56 100 39 161 63 135 53 97 38 2 44VAx 120 34 20 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 82 33 161 63 117 46 97 38 19 42VAH 120 34 20 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 100 39 161 63 135 53 97 38 21 46VAx 125 1 25 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 82 33 161 63 117 46 97 38 19 42VAH 125 1 25 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 100 39 161 63 135 53 97 38 21 46VAx 240 112 40 128 50 200 79 85 33 29 11 66 26 170 67 112 44 191 75 162 64 125 49 44 97VAH 240 112 40 128 50 200 79 85 33 29 11 66 26 170 67 132 52 191 75 182 72 125 49 47 104VAx 350 2 50 155 61 230 91 85 33 36 14 74 29 180 70 135 53 201 79 196 77 160 63 61 134VAH 350 2 50 155 61 230 91 85 33 36 14 74 29 180 70 156 61 201 79 217 85 160 63 64 141

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 52

10 Converting unitssee wwwadlatusorg

11 Maintenance cyclesAt least once per annum at least twice per annum for biologi-cally produced methaneIf the flow rate drops clean the strainer

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 53

12 Glossary12 1 Diagnostic coverage DCMeasure of the effectiveness of diagnostics which may be determined as the ratio between the failure rate of detected dangerous failures and the failure rate of total dangerous failuresNOTE Diagnostic coverage can exist for the whole or parts of a safety-related system For example diagnostic cover-age could exist for sensors andor logic system andor final elements Unit see EN ISO 13849-12008

12 2 Mode of operationHigh demand mode or continuous modeOperating mode where the frequency of demands for opera-tion made on a safety-related system is greater than one per year or greater than twice the proof-test frequencysee EN 61508-42008

12 3 CategoryClassification of the safety-related parts of a control system in respect of their resistance to faults and their subsequent behaviour in the fault condition and which is achieved by the structural arrangement of the parts fault detection andor by their reliability see EN ISO 13849-12008

12 4 Common cause failure CCFFailures of different items resulting from a single event where these failures are not consequences of each othersee EN ISO 13849-12008

12 5 Fraction of undetected common cause failures β Fraction of undetected failures of redundant components due to a single event whereby these failures are not based on mutual causesNOTE β is expressed as a fraction in the equations and as a percentage elsewheresee EN 61508-62010

12 6 B10d valueMean number of cycles until 10 of the components fail dan-gerouslysee EN ISO 13849-12008

12 7 T10d valueMean time until 10 of the components fail dangerouslysee EN ISO 13849-12008

12 8 Hardware fault tolerance HFTA hardware fault tolerance of N means that N + 1 is the mini-mum number of faults that could cause a loss of the safety functionsee IEC 61508-22010

12 9 Mean dangerous failure rate λD Mean rate of dangerous failures during operation time (T10d) Unit 1hsee EN ISO 13849-12008

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 54

12 10 Safe failure fraction SFFFraction of safe failures related to all failures which are as-sumed to appearsee EN 13611A22011

12 11 Probability of dangerous failure PFHD Value describing the likelihood of dangerous failure per hour of a component for high demand mode or continuous mode Unit 1hsee EN 13611A22011

12 12 Mean time to dangerous failure MTTFd Expectation of the mean time to dangerous failuresee EN ISO 13849-12008

12 13 Demand rate nop Mean number of annual operationssee EN ISO 13849-12008

12 14 Average probability of dangerous failure on demand PFDavg (LDM = 1 ndash 10 switching cyclesyear)Average probability of a dangerous failure of the safety function on demand (LDM = low demand mode)see EN 61508-6

Glossary

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415

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Remarks

(Adobe Reader 7 or higher required) wwwadobecom

Elster GmbH Postfach 2809 middot 49018 Osnabruumlck Strotheweg 1 middot 49504 Lotte (Buumlren) GermanyT +49 541 1214-0 F +49 541 1214-370 infokromschroedercomwwwkromschroedercom

The current addresses of our international agents are available on the Internetwwwkromschroederdeindexphpid=718ampL=1

We reserve the right to make technical modifications in the interests of progressCopyright copy 2015 Elster GmbH All rights reserved

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0530

  • Pressure regulators with solenoid valve VAD VAG VAV VAH
  • Flow rate regulator VRH
  • Pressure regulators with double solenoid valve VCD VCG VCV VCH
  • Contents
  • 1 Application
    • 11 Examples of application
      • 111 Constant pressure control
      • 112 Constant pressure control with two gas solenoid valves
      • 113 Constant pressure control with max pressure switch
      • 114 Constant pressure control with non-controlled pilot gas outlet
      • 115 Modulating control
      • 116 Modulating control with two gas solenoid valves
      • 117 Modulating control with two gas solenoid valves and inlet pressure switch
      • 118 HighLow control
      • 119 Zero pressure control
      • 1110 Staged flow rate control
      • 1111 Continuous or staged flow rate control
      • 1112 Modulating control with variable airgas ratio control with gas solenoid valve
      • 1113 Modulating control in residential heat generation
          • 2 Certification
          • 3 Function
            • 31 VAD VAG VAH VRH VAV
              • 311 Pressure regulator for gas VAD
              • 312 Airgas ratio control VAG
              • 313 Flow rate regulators VAH VRH
              • 314 Variable airgas ratio control VAV
              • 315 Pressure regulator with gas solenoid valve VAxS position indicator with visual indicator
                • 32 Animation
                • 33 Connection diagram
                  • 331 VAx with M20 cable gland
                  • 332 VAx with plug
                  • 333 VAS with VADVAGVAHVAV with M20 cable gland
                  • 334 VAS with VADVAGVAHVAV with plug
                      • 4 Replacement possibilities for MODULINE pressure regulators with gas solenoid valve
                        • 41 GVS GVI GVIB GVR and GVRH are to be replaced by VAD VAG VAG+VAS VAH and VAV
                          • 5 Flow rate
                            • 51 Selection example for VAD
                              • 511 Calculate VAD
                                • 52 Selection example for VAG VAH VRH VAV
                                  • 521 CalculateVAG VxHVAV
                                    • 53 Selection example for zero governor VAGN
                                      • 531 Calculate VAGN
                                          • 6 Selection
                                            • 61 Selection table for pressure regulator with solenoid valve VAD
                                            • 62 Type code for VAD
                                            • 63 Selection table for airgas ratio control with solenoid valve VAG flow rate regulators VAH VRH
                                            • 64 Type code for VAG VAH VRH
                                            • 65 Selection table for variable airgas ratio control with solenoid valve VAV
                                            • 66 Type code for VAV
                                            • 67 Accessories
                                              • 7 Project planning information
                                                • 71 Installation
                                                  • 711 Installation position
                                                    • 72 Setting the low-fire rate on VAG VAH VRH VAV
                                                    • 73 Setting the high-fire rate on VAV
                                                      • 731 Calculation
                                                          • 8 Accessories
                                                            • 81 Gas pressure switch DGVC for VAx VRH
                                                            • 82 Gas pressure switch DGVCT for VAxT VRHT
                                                            • 83 Bypass valvepilot gas valve VAS 1
                                                              • 831 VAS 1 attached to VADVAGVAHVAV 1
                                                              • 832 VAS 1 attached to VADVAGVAHVAV 2 VADVAGVAHVAV 3
                                                              • 833 Flow rate
                                                                • 84 Bypass valvepilot gas valve VBY 8 for VADVAGVAHVAV 1
                                                                  • 841 Scope of delivery VBY 8I as bypass valve
                                                                  • 842 Scope of delivery VBY 8R as pilot gas valve
                                                                  • 843 Selection
                                                                  • 844 Type code
                                                                  • 845 Flow rate
                                                                  • 846 Technical data
                                                                    • 85 Tightness control TC 116V
                                                                    • 86 Pressure test points
                                                                    • 87 Cable gland set
                                                                    • 88 Seal set VA 1thinspndashthinsp3
                                                                    • 89 Differential pressure orifice
                                                                    • 810 Retaining frame
                                                                    • 811 Attachment block
                                                                    • 812 Gas control line
                                                                    • 813 Measuring orifice VMO
                                                                    • 814 Filter module VMF
                                                                    • 815 Fine-adjusting valve VMV
                                                                      • 9 Technical data
                                                                        • 91 VAD
                                                                        • 92 VAG
                                                                        • 93 VAH VRH
                                                                        • 94 VAV
                                                                        • 95 Safety-specific characteristic values for VAx 1thinspndashthinsp3
                                                                          • 951 Determining the PFHD value the λD value and the MTTFd value
                                                                          • 952 Calculating the PFHD and PFDavg
                                                                            • 96 Dimensions
                                                                              • 10 Converting units
                                                                              • 11 Maintenance cycles
                                                                              • 12 Glossary
                                                                                • 121 Diagnostic coverage DC
                                                                                • 122 Mode of operation
                                                                                • 123 Category
                                                                                • 124 Common cause failure CCF
                                                                                • 125 Fraction of undetected common cause failures β
                                                                                • 126 B10d value
                                                                                • 127 T10d value
                                                                                • 128 Hardware fault tolerance HFT
                                                                                • 129 Mean dangerous failure rate λD
                                                                                • 1210 Safe failure fraction SFF
                                                                                • 1211 Probability of dangerous failure PFHD
                                                                                • 1212 Mean time to dangerous failure MTTFd
                                                                                • 1213 Demand rate nop
                                                                                • 1214 Average probability of dangerous failure on demand PFDavg
                                                                                  • Feedback
                                                                                  • Contact
                                                                                      1. naechste_Seite 24
                                                                                      2. naechste Seite 18
                                                                                      3. naechste Seite 6
                                                                                      4. naechste Seite 16
                                                                                      5. naechste Seite 14
                                                                                      6. naechste Seite 25
                                                                                      7. naechste_Seite 11
                                                                                      8. naechste_Seite 17
                                                                                      9. fbArbeitspunkt_Min Ja
                                                                                      10. fbArbeitspunkt Ja
                                                                                      11. ftProgramm Standard-Programm
                                                                                      12. fz_kv
                                                                                      13. fz_pe 80
                                                                                      14. fz_pG 60
                                                                                      15. fzDelta_p_Soll 20
                                                                                      16. ftEinheit_Druck mbar
                                                                                      17. fatTyp [115]
                                                                                      18. fbArbeitspunkt_Min_2 Ja
                                                                                      19. fbArbeitspunkt_2 Ja
                                                                                      20. ftRegler_Typ VAG
                                                                                      21. ftProgramm_2 Standard-Programm
                                                                                      22. fz_kv_2
                                                                                      23. fatMedium [08]
                                                                                      24. fzDichte 08
                                                                                      25. ftEinheit_Dichte kgm3
                                                                                      26. fzV_Norm 30
                                                                                      27. ftEinheit_Volstrom m3h
                                                                                      28. fz_pe_2 80
                                                                                      29. fz_pG_2 60
                                                                                      30. fzDelta_p_Soll_2 20
                                                                                      31. ftEinheit_Druck2 [mbar]
                                                                                      32. ftEinheit_Geschw [ms]
                                                                                      33. fatTyp_2 [10954451150103322]
                                                                                      34. fbArbeitspunkt_Min_3 Ja
                                                                                      35. fbArbeitspunkt_3 Ja
                                                                                      36. ftProgramm_3 Standard-Programm
                                                                                      37. fz_kv_3
                                                                                      38. fz_pe_3 20
                                                                                      39. fz_pG_3 0
                                                                                      40. fzDelta_p_Soll_3 20
                                                                                      41. fatTyp_3 [123]
                                                                                      42. fatSchaltleistung [6363683]
                                                                                      43. fz_nop_Stunde 1
                                                                                      44. fz_nop_Jahr 8760
                                                                                      45. fzZyklus 3600
                                                                                      46. fzB10d 6363683
                                                                                      47. fzT10d 10
                                                                                      48. fzPFHd_1V 15714170551864384e-8
                                                                                      49. fzPFDavg_1V
                                                                                      50. ftGeeignet_1V PL d SIL 2
                                                                                      51. fzPFHd_2V 33505832253532625e-10
                                                                                      52. fzPFDavg_2V
                                                                                      53. ftGeeignet_2V PL e SIL 3
                                                                                      54. ftUebersicht Off
                                                                                      55. ftVerstaendlichkeit Off
                                                                                      56. ftFehlende_Info
                                                                                      57. ftUmfang Off
                                                                                      58. ftVerwendung_1 Off
                                                                                      59. ftVerwendung_2 Off
                                                                                      60. ftVerwendung_3 Off
                                                                                      61. ftVerwendung_4 Off
                                                                                      62. ftNavigation Off
                                                                                      63. ftTaetigkeitsbereich Off
                                                                                      64. ftBemerkung
                                                                                      65. Michael Rehkamp Elster Kromschroumlder>btnSenden
Page 12: VAD, VAG, VAV, VAH, VRH, VCD, VCG, VCV, VCH · PDF fileVAD, VAG, VAH, VAV, VRH, VCD, VCG, VCV, VCH · Edition 04.15 6 VAD VAD VAS 1 .1 Examples of application 1 .1 .1 Constant pressure

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 12

M

IC + BVA

VMV

VMO

VAH

VAS

psa-psa

pd-

psa

psc

DGCmin

PZL

psa

psc

M

IC + BVA

VAS VAV

1 1 11 Continuous or staged flow rate controlThis application shows flow rate control for a radiant tube burner system with plug-in recuperator for air preheatingThere are temperature-dependent air pressure losses in the recuperator The ratio of gas pressure to air pressure does not remain constant The fluctuating air flow rate is measured at the measuring orifice VMO and the VAH controls the gas flow rate proportionallyThe air index (lambda) can be set using the fine-adjusting valve VMV

Application gt Examples of application

1 1 12 Modulating control with variable airgas ratio control with gas solenoid valveThe ratio of gas pressure to air pressure can be adjusted infinitely between 061 and 31 Pressure fluctuations in the com-bustion chamber can be compensated via the combustion chamber control pressure psc see page 15 (Function)

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 13

DGCmin

PZL

psa

psc

VAS VAV

1 1 13 Modulating control in residential heat generationThis application shows the variable airgas ratio control with solenoid valve VAV fitted to a modulating-controlled forced draught burnerThe combustion air volume is set via a butterfly valve for air or by adjusting the fan speed

Application gt Examples of application

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 14

2 CertificationCertificates ndash see Docuthek

VAD VAG VAV VAH certified to SIL and PL

For systems up to SIL 3 pursuant to EN 61508 and PL e pursu-ant to ISO 13849

VAD VAG VAV VAHEU certified pursuant to

ndash Gas Appliances Directive (2009142EC) in conjunction with EN 13611 EN 161 EN 88-1 EN 126 and EN 1854

Meets the requirements of thendash Low Voltage Directive (200695EC)ndash EMC Directive (2004108EC)

VAD VAG VAV VAH FM approved

Factory Mutual Research Class 7400 Process Control Valves Designed for applications pursuant to NFPA 85 and NFPA 86 www approvalguide com

VAD VAG ANSICSA approved

American National Standards InstituteCanadian Standards Association ndash ANSI Z21 21CSA 6 5 ANSI Z21 18 and CSA 6 3

wwwcsagrouporg ndash Class number 3371-83 (natural gas LPG) 3371-03 (natural gas propane)

VAD VAG VAV UL listed

Underwriters Laboratories ndash UL 429 ldquoElectrically operated valvesrdquo wwwulcom Tools (at the bottom of the page) Online Certifications Directory

VAD VAG VAV AGA approved

AGA

Australian Gas Association Approval No 5319 httpwww aga asn auproduct_directory

Eurasian Customs Union

The product VAD VAG VAV VAH VCD VCG VCV VCH meets the technical specifications of the Eurasian Customs Union (the Russian Federation Belarus Kazakhstan)

Approval does not apply for 100 V AC and 200 V AC

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 15

3 Function3 1 VAD VAG VAH VRH VAVThe regulator is closed when it is disconnected from the power supplyOpening connect the system to the electrical power supply (alternating voltage will be rectified) The blue LED lights up The coilrsquos magnetic field pulls the armature upwards and clears the supply nozzle for the gas inlet pressure pu The gas passes through the internal impulse tube to the adjustment diaphragm and then pushes the valve disc open The outlet pressure is applied to the servo diaphragm via the internal feedback

The servo regulator then maintains a set constant outlet pres-sure pd

3 1 1 Pressure regulator for gas VADThe nominal outlet pressure pd is defined by the control spring

Servoregulator

Valve

Armature

Valve disc

Adjustmentdiaphragm

Servodiaphragm

Internalfeedback

Controlspring

Solenoid coil

Supplynozzle

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 16

3 1 2 Airgas ratio control VAGThe airgas ratio control VAG controls the outlet pressure pd depending on the variable air control pressure psaThe ratio of gas pressure to air pressure remains constant 11 The VAG is suitable for a control range up to 101If the burner operates at low-fire rate the gasair mixture can be changed by adjusting the zero point spring ldquoNrdquo

Function

psa

pd

Zero point setting N zero point spring

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 17

Function

3 1 3 Flow rate regulators VAH VRHThe flow rate regulators VAH VRH control the gas flow rate depending on the variable air flow rate The ratio of gas flow rate to air flow rate remains constant If the burner operates at low-fire rate the gasair mixture can be changed by adjusting the zero point spring ldquoNrdquoIn addition flow rate regulator VAH is designed as a gas solenoid valve and shuts off the gas or air supply safely

psa

psa-

pd-

pdInternal feedback

Zero point setting N zero point spring

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 18

3 1 4 Variable airgas ratio control VAVThe servo regulator maintains a set constant outlet pressure pd The variable airgas ratio control VAV controls the outlet pressure pd depending on the variable air control pressure psa The ratio of gas pressure to air pressure remains constantThe settings N and V can be changed and read off from both sides of the unit using the adjusting screwsThe ratio of gas pressure to air pressure at low-fire rate can be changed by adjusting the zero point setting N By turning the adjusting screw ldquoNrdquo the force of the zero point spring and thus the zero point is changed by plusmn 15 mbar (06 WC) see page 34 (Project planning information)The high-fire rate is set by turning the adjusting screw ldquoVrdquo until the required flue gas values are achieved see page 34 (Project planning information) The ratio of gas pressure to air pressure can be set from 061 to 31The settings N and V influence each other and the adjustment process must be repeated if necessaryThe outlet pressure pd is applied to the servo diaphragm via the internal feedback The combustion chamber control pres-sure psc is transmitted to the space under the air and servo diaphragms via an impulse lineThe pressure differential psa - psc is achieved on the air diaphragm and the pressure differential pd - psc on the servo diaphragm This ensures that pressure fluctuations in the combustion cham-ber can be compensated The flue gas values remain constant in the case of fluctuations in the combustion chamber pressure (pd - psc) = (psa - psc) times V + N

Function

pdpsc

psa

Air diaphragm

Transmission ratio V

Zero point setting N zero point spring

Internalfeedback

Adjustment diaphragm

Servo diaphragm

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 19

1 COM

2 NO

3 NC

3 1 5 Pressure regulator with gas solenoid valve VAx S position indicator with visual indicatorOpening when the pressure regulator is opened the posi-tion indicator switches The visual indicator is activated The ldquoopenrdquo signal is marked in red The double valve seat opens to release the volume of gasClosing the pressure regulator VAx is disconnected from the voltage supply and the closing spring presses the double valve disc on to the valve seat The position indicator is actuated The visual indicator is white for ldquoclosedrdquoThe actuator cannot be rotated on a pressure regulator with a position indicator and a visual indicatorNOTE NFPA 86 ndash the following must be taken into account as soon as the capacity of the pilot or main burner exceeds 117 kW (400000 BTUh) safety shut-off valve VASS must be fitted with a proof of closure overtravel switch with a visual position indicator and the burner-side pressure regulator with gas solenoid valve VAxS must also be fitted with a position indicator with visual indicator The closed position can be verified using the proof of closure switch of the gas solenoid valve VASS

Function

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 20

3 2 AnimationThe interactive animation shows the function of the valVario controls VADVAGVAHVAVClick on the picture The animation can be controlled using the control bar at the bottom of the window (as on a DVD player) To play the animation you will need Adobe Reader 7 or a newer version If you do not have Adobe Reader on your system you can download it from the Internet

Go to wwwadobecom click on ldquoAdobe Readerrdquo at the bottom of the page and follow the instructionsIf the animation does not start to play you can download it from the document library (wwwdocuthekcom) as an inde-pendent application

Function

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 21

3 3 Connection diagramWiring to EN 60204-1Connection diagram for VAxS with position indicator ndash see page 19 (Pressure regulator with gas solenoid valve VAxS position indicator with visual indicator)

3 3 1 VAx with M20 cable gland

L1 (+)

N (ndash)

3 3 2 VAx with plug

1 = N (-)

2 = L1 (+)

3 3 3 VAS with VADVAGVAHVAV with M20 cable glandL1V1 (+)

N (-)

L1V2 (+)

3 3 4 VAS with VADVAGVAHVAV with plug2 = L1V1 (+)

1 = N (-)

3 = L1V2 (+)

Function

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 22

4 Replacement possibilities for MODULINE pressure regulators with gas solenoid valve4 1 GVS GVI GVIB GVR and GVRH are to be replaced by VAD VAG VAG+VAS VAH and VAV

Type TypeGVS Pressure regulator with gas solenoid valve Pressure regulator with gas solenoid valve VADGVI Airgas ratio control with gas solenoid valve Airgas ratio control with gas solenoid valve VAG

GVIB Airgas ratio control with gas solenoid valve and bypass valve

Airgas ratio control with gas solenoid valve and bypass valve VAG+VAS

GVRH Flow rate regulator with gas solenoid valve Flow rate regulator with gas solenoid valve VAHGVR Variable airgas ratio control with gas solenoid valve Variable airgas ratio control with solenoid valve VAV115125 Flange 38 Size 115

Size 125 on request

115125 Flange frac12 Size 115

Size 125 Size 1 DN 15 115

115125 Flange frac34 Size 115

Size 125 Size 1 DN 20 120

115125 Flange 1 Size 115

Size 125 Size 1 DN 25 125

232240 Flange 1 Size 232

Size 240 on request

232240 Flange 1frac12 Size 232

Size 240 Size 2 DN 40 240

350 Flange 1frac12 Size 350 on request350 Flange 2 Size 350 Size 3 DN 50 350ML MODULINE + Rp internal thread connection fl anges Rp internal thread RTML MODULINE + NPT internal thread connection fl anges NPT internal thread N01 pu max 100 mbar (15 psig) pu max 500 mbar (7 psig) 02 200 mbar (3 psig) 500 mbar (7 psig)

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 23

Replacement possibilities for MODULINE pressure regulators with gas solenoid valve gt GVS GVI GVIB GVR and GVRH are to be replaced by VAD VAG VAG+VAS VAH and VAV

ContinuationType Type

Quick opening Quick opening NF1 Control ratio 11 Control ratio 11 K Mains voltage 24 V DC Mains voltage 24 V DC K

ndash 100 V AC PQ 120 V AC 120 V AC Q

ndash 200 V AC YT 220240 V AC 230 V AC W3 Electrical connection via terminals Electrical connection via terminals 6 Electrical connection via socket Electrical connection via socket 9 Metal terminal connection box Electrical connection via terminals S Position indicator Position indicator with visual indicator SG Position indicator for 24 V Position indicator for 24 V with visual indicator GM Suitable for biologically produced methane Suitable for biologically produced methane

Pressure test point at the inlet Pressure test point at the inlet and outlet Outlet pressure pd -25

Outlet pressure pd 25 ndash 25 mbar (1 ndash 10 WC)

2 ndash 90 mbar (08 ndash 36 WC) 20 ndash 50 mbar (8 ndash 20 WC) -5035 ndash 100 mbar (14 ndash 40 WC) -100Standard seat A

ExampleGVS 350ML01T3with Rp 2 connection flanges

ExampleVAD 350RNW-100A

with test points

= standard = available Pressure test points may be attached at the left- andor right-hand side Position indicator with visual indicator can be attached at the left- or right-hand side

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 24

∆p [i

nch

WC]

Qn [SCFH]100 400 600 4000 60001000 200020 30 40 50 200 3006015 80

1

08

1

2

3

4

56

8

10

20

30

40

5060

80

100

200

∆p [m

bar]

5

8

3

20

10

30

40

80

60

300

400

50

04 06 1 2 3 4 5 808 10 20 30 402

03 60 100 200

100

200

500

1

3

2

04 06 08 1 2 3 4 5 6 8 10 20 30 40

04 06 08 1 2 3 4 5 6 8 10

200

80 10020 3003

03Qn [m3h]

02

50 60 80 100

40 50 60

VAD

115

B

VAD

120

AVA

D 12

5A

P1P2

VAD

240

AVA

D 35

0A

= natural gas (ρ = 080 kgm3) = propane (ρ = 201 kgm3) = air (ρ = 129 kgm3)

The characteristic flow rate curves have been meas-ured with the specified flanges and a fitted strainer If two or more valves are combined the pressure loss of each additional valve drops by approx 5

metric imperial

Enter densityFlow rate Qn

Inlet pressure pu

Outlet pressure pd

Product RV v

Pressure loss ∆p

∆pmin

5 Flow rate5 1 Selection example for VADNatural gas Flow rate Qmax = 30 m3h Inlet pressure pu = 80 mbar Outlet pressure pd = 60 mbarThe desired control ratio from high-fire to low-fire rate is RV = 101High fire ∆p = pu - pd = 20 mbar Point P1Low fire Point P2 Qmin = 26 m3h at ∆p = 20 mbar RV = Qmax Qmin = 1151

Point P1 and point P2 must be within the working range of a unit size We recommend that you select the smallest size to achieve the best control properties

5 1 1 Calculate VAD

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 25

∆p [i

nch

WC]

Qn [SCFH]100 400 600 4000 60001000 200020 30 40 50 200 3006015 80

1

08

1

2

3

4

56

8

10

20

30

40

5060

80

100

200

∆p [m

bar]

5

8

3

20

10

30

40

80

60

300

400

50

04 06 1 2 3 4 5 808 10 20 30 402

03 60 100 200

100

200

500

1

3

2

04 06 08 1 2 3 4 5 6 8 10 20 30 40

04 06 08 1 2 3 4 5 6 8 10

200

80 10020 3003

03Qn [m3h]

02

50 60 80 100

40 50 60

= pd min lt 5 mbar

VAG

VxH

VAV

115

BVA

GV

xHV

AV 12

0A

VAG

VxH

VAV

125

A

P1

P2

VAG

VxH

VAV

240

AVA

GV

xHV

AV 3

50A

= natural gas (ρ = 080 kgm3) = propane (ρ = 201 kgm3) = air (ρ = 129 kgm3)

The characteristic flow rate curves have been meas-ured with the specified flanges and a fitted strainer If two or more valves are combined the pressure loss of each additional valve drops by approx 5

5 2 Selection example for VAG VAH VRH VAV Natural gas Flow rate Qmax = 30 m3h Inlet pressure pu = 80 mbar Outlet pressure pd max VAG = 60 mbarThe desired control ratio from high-fire to low-fire rate is RV = 101High fire ∆p = pu - pd max = 20 mbar Point P1Low fire pd min = pd max RV2 = 06 mbar Qmin = Qmax RV = 3 m3h ∆p = pu - pd min = 794 mbar Point P2 select VAG 120APoint P1 and point P2 must be within the working range of a unit size We recommend that you select the smallest size to achieve the best control properties

metric imperial

Enter densityFlow rate Qn

Inlet pressure pu

Outlet pressure pd

Product RV v

5 2 1 Calculate VAG VxH VAV

Pressure loss ∆p

∆pmin

Flow rate

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 26

∆p [i

nch

WC]

Qn [SCFH]100 400 600 4000 60001000 200020 30 40 50 200 3006015 80

1

08

1

2

3

4

56

8

10

20

30

40

5060

80

100

200

∆p [m

bar]

5

8

3

20

10

30

40

80

60

300

400

50

04 06 2 3 4 5 808 10 20 30 402

03 60 100 200

100

200

500

1

3

2

04 06 08 1 2 3 4 5 6 8 10 20 30 40

04 06 08 1 2 3 4 5 6 8 10

200

80 10020 3003

03Qn [m3h]

02

50 60 80 100

40 50 60

VAG

115

N

P1VAG

125

N

VAG

120

N

VAG

240

NP2

VAG

350

N

= natural gas (ρ = 080 kgm3) = propane (ρ = 201 kgm3) = air (ρ = 129 kgm3)

The characteristic flow rate curves have been meas-ured with the specified flanges and a fitted strainer If two or more valves are combined the pressure loss of each additional valve drops by approx 5

5 3 Selection example for zero governor VAG NNatural gas Flow rate Qmax = 30 m3h Inlet pressure pu = 20 mbar Outlet pressure pd = 0 mbar (atmospheric pressure)The desired control ratio from high-fire to low-fire rate is RV = 101High fire ∆p = pu - pd max = 20 mbar Point P1Low fire Point P2 Qmin = 24 m3h at ∆p = 20 mbar RV = Qmax Qmin = 1231Point P1 and point P2 must be within the working range of a unit size We recommend that you select the smallest size to achieve the best control properties

metric imperial

Enter densityFlow rate Qn

Inlet pressure pu

Outlet pressure pd

Product RV

5 3 1 Calculate VAG N

Pressure loss ∆p

∆pmin

Flow rate

v

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 27

6 Selection6 1 Selection table for pressure regulator with solenoid valve VAD

Accessories right Accessories left

Type1) T R N F N K P Q Y W S2) G2) R2) L2) M20

cab

le g

land

Plug

with

soc

ket

Plug

with

out s

ocke

t

-25-50 -100 A B Scre

w p

lug

Pres

sure

test

poi

nt

DG

17V

C 3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

Scre

w p

lug

Pres

sure

test

poi

nt

DG

17V

C 3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

VAD 115

VAD 120

VAD 125

VAD 240

VAD 350

= standard = available1) The following nominal inlet fl ange diameters are also available size 1 with nominal diameter DN 10 size 2 with nominal diameters DN 25 DN 32 and DN 50 size 3 with nominal diameters DN 40 and DN 652) Position indicator and bypasspilot gas valve cannot be fi tted together on the same side3) Specify the test point for inlet pressure pu or outlet pressure pdHelp for selecting the pressure regulator VAD can be found on the ProFi DVD wwwkromschroedercom Products DVD Product fi nder ldquoProFirdquo

Order exampleVAD 240RNW-100A

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 28

Selection

6 2 Type code for VADCode DescriptionVAD Pressure regulator with solenoid valve1 ndash 3 SizeT T-product10 ndash 65 Nominal inlet and outlet diameterRNF

Rp internal threadNPT internal thread

ISO fl angeN Quick opening quick closingKPQYW

Mains voltage 24 V DCMains voltage 100 V AC 5060 HzMains voltage 120 V AC 5060 HzMains voltage 200 V AC 5060 HzMains voltage 230 V AC 5060 Hz

SG

Position indicator with visual indicatorPosition indicator for 24 V with visual indicator

RL

Viewed from the right (in the direction of fl ow)Viewed from the left (in the direction of fl ow)

-25-50-100

Outlet pressure pd 25 ndash 25 mbar20 ndash 50 mbar

35 ndash 100 mbarAB

Standard valve seatReduced valve seat

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 29

Selection

6 3 Selection table for airgas ratio control with solenoid valve VAG flow rate regulators VAH VRH

Type1) T R N F N K P Q Y W S2) G2) R2) L2) M20

cab

le g

land

Plug

with

soc

ket

Plug

with

out s

ocke

t

A B E K A N Scre

w p

lug

Pres

sure

test

poi

ntD

G 1

7VC

3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

Scre

w p

lug

Pres

sure

test

poi

ntD

G 1

7VC

3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

VAG 115 VAG 120 VAG 125 VAG 240 VAG 350

VAH 115 VAH 120 VAH 125 VAH 240 VAH 350

VRH 115 VRH 120 VRH 125 VRH 240 VRH 350

= standard = available1) The following nominal inlet fl ange diameters are also available size 1 with nominal diameter DN 10 size 2 with nominal di-

ameters DN 25 DN 32 and DN 50 size 3 with nominal diameters DN 40 and DN 652) Position indicator and bypasspilot gas valve cannot be fi tted together on the same side3) Specify the test point for inlet pressure pu or outlet pressure pdHelp for selecting the regulators can be found on the ProFi DVD wwwkromschroedercom Products DVD Product fi nder ldquoProFirdquo

Order exampleVAG 240RNWAE

Accessories right Accessories left

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 30

Selection

6 4 Type code for VAG VAH VRHCode DescriptionVAGVAHVRH

Airgas ratio control with solenoid valveFlow rate regulator with solenoid valve

Flow rate regulator1 ndash 3 SizeT T-product15 ndash 50 Nominal inlet and outlet diameterRNF

Rp internal threadNPT internal thread

ISO fl angeN1) Quick opening quick closingK1)

P1)

Q1)

Y1)

W1)

Mains voltage 24 V DCMains voltage 100 V AC 5060 HzMains voltage 120 V AC 5060 HzMains voltage 200 V AC 5060 HzMains voltage 230 V AC 5060 Hz

S1)

G1)Position indicator with visual indicator

Position indicator for 24 V with visual indicatorRL

Viewed from the right (in the direction of fl ow)Viewed from the left (in the direction of fl ow)

AB

Standard valve seatReduced valve seat

EKAN

Connection kit for air control pressure psaVAG VAH VRH compression fi tting

VAG plastic hose couplingVAG VAH VRH NPT 18 adapter

VAG zero governor1) Only available for VAG VAV VAH

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 31

6 5 Selection table for variable airgas ratio control with solenoid valve VAVAccessories right Accessories left

Type1) T R N F N K P Q Y W S2) G2) R2) L2) M20

cab

le g

land

Plug

with

soc

ket

Plug

with

out s

ocke

t

A B E K A Scre

w p

lug

Pres

sure

test

poi

ntD

G 1

7VC

3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

Scre

w p

lug

Pres

sure

test

poi

ntD

G 1

7VC

3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

VAV 115

VAV 120

VAV 125

VAV 240

VAV 350

= standard = available1) The following nominal inlet fl ange diameters are also available size 1 with nominal diameter DN 10 size 2 with nominal diameters DN 25 DN 32 and DN 50 size 3 with nominal diameters DN 40 and DN 652) Position indicator and bypasspilot gas valve cannot be fi tted together on the same side3) Specify the test point for inlet pressure pu or outlet pressure pdHelp for selecting the variable airgas ratio control VAV can be found on the ProFi DVD wwwkromschroedercom

Products DVD Product fi nder ldquoProFirdquo

Order exampleVAV 240RNWAK

Selection

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 32

Selection

6 6 Type code for VAVCode DescriptionVAV Variable airgas ratio control with solenoid valve1 ndash 3 SizeT T-product15 ndash 50 Nominal inlet and outlet diameterRNF

Rp internal threadNPT internal thread

ISO fl angeN Quick opening quick closingKPQYW

Mains voltage 24 V DCMains voltage 100 V AC 5060 HzMains voltage 120 V AC 5060 HzMains voltage 200 V AC 5060 HzMains voltage 230 V AC 5060 Hz

SG

Position indicator with visual indicatorPosition indicator for 24 V with visual indicator

RL

Viewed from the right (in the direction of fl ow)Viewed from the left (in the direction of fl ow)

AB

Standard valve seatReduced valve seat

EKA

Connection kit for air control pressure psa and combus-tion chamber control pressure psc

compression fi ttingplastic hose coupling

NPT 18 adapter

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 33

Selection

6 7 AccessoriesModularly configurable withndash Screw plugsndash Pressure test pointsndash Pressure switch DGVC for inlet

andor outlet pressurendash Tightness control TCndash Bypasspilot gas valve VBY 8 for

size 1ndash Bypasspilot gas valve VAS 1For further information see page 37 (Accessories)

Position indicator

Plug with socket

Plug

Screwplugs

Pressuretest points

Pressure switch DGC Tightness

control TC

Bypasspilot gas valve VBY 8 for size 1

Bypasspilot gas valve VAS 1

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 34

7 Project planning informationDo not store or install the unit in the open airThe inlet pressure pu and the outlet pressure pd can be meas-ured on both sides of the valve body To increase the control accuracy an external impulse line can be connected instead of the pressure test point pd

VAD

pu

pd

(psa)

VAGpd

pu

psa

psa

VAD measurement point for the gas outlet pressure pd on the regulator body A combustion chamber control line (psc) can be connected to connection psa for maintaining a constant burner capacityVAG additional measurement point for the air control pressure psa on the regulator body

VAV

psapsc

pu

pd

VAH VRH

pu

pd-

pdpsa-

psa

VAV measurement point for the outlet pressure pd on the regulator bodyVAH additional measurement points for the outlet pressure pd- and the air control pressure psapsa- on the regulator body

7 1 Installation

GFK

VAGVAH

GFKVAD

Sealing material and thread cuttings must not be allowed to get into the valve housing Install a filter upstream of every system

gt20 mmgt0 79

The unit must not be in contact with masonry Minimum clear-ance 20 mm (079 inches)Ensure that there is sufficient space for installation and ad-justment

le +100 degCle +212 degF

The solenoid body heats up during operation ndash depending on ambient temperature (max 60degC140degF) and intrinsic heating (approx 40degC104degF)

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 35

In the case of double solenoid valves the position of the con-nection box can only be changed by removing the actuator and reinstalling it offset by 90deg or 180deg

If more than three valVario controls are installed in line the controls must be supported

The seals in some gas compression fittings are approved for temperatures of up to 70degC (158degF) This temperature limit will not be exceeded if the flow through the pipe is at least 1 msup3h (3531 SCFH) of gas and the maximum ambient temperature is 50degC (122degF)

7 1 1 Installation position

pu ge 80 mbar(80 hPa32 WC)

VAD VAG VAH VRH VAV

In humid environments black solenoid actuator in the vertical upright position only

VAD VAG VAH VRH black solenoid actuator in the vertical upright position or tilted up to the horizontal not upside downVAG VAH horizontal position only if pu ge 80 mbar (32 WC))VAV installation in the vertical position only black solenoid actuator in the vertical upright positionTo ensure that the airgas ratio control VAG the flow rate regulator VAH VRH or the variable airgas ratio control VAV can react quickly when the load is changed the impulse line for the air control pressure psa and for VAV the impulse line for the combustion chamber control pressure psc should be kept as short as possible The tube internal diameter for the impulse line must always be ge 39 mm (015)

VAH VRHIt is not permitted to install a gas solenoid valve VAS down-stream of flow rate regulator VAH VRH and upstream of fine-adjusting valve VMV The VAS would no longer be able to perform its function as a second safety valve if installed in the above-mentioned position

M

VMV

VAH

VASVAS

pd-

psa-psa

VMV

VAH pd-

psa-psa

The measuring orifice in the air line for impulse lines psa and psa- must always be installed downstream of the air control valve

Project planning information gt Installation

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 36

VAVThe impulse line for the combustion chamber control pres-sure psc must be fitted so that no condensation can enter the pressure regulator but rather flows back into the combustion chamber

7 2 Setting the low-fire rate on VAG VAH VRH VAV

-10 +05-05

ndash

+1

-15

mbar

+15

06

1 152

3

N V

+ +ndash

+30 -15+15

ndash

-3

+5

mbar

-5

N

+

VAG VAH VRH VAV

If the burner operates at low-fire rate the gasair mixture can be changed using the parallel shift of the characteristic curve by turning the adjusting screw ldquoNrdquoAdjusting range at low fire VAG VAH VRH -5 to +5 mbar (-195 to +195 WC) VAV -15 to +15 mbar (-06 to +06 WC)

7 3 Setting the high-fire rate on VAVTo set the high-fire rate the transmission ratio is changed us-ing the adjusting screw ldquoVrdquo until the required flue gas values are achievedTransmission ratio V = pdpsa = 061 to 31The settings N and V can influence each other and must be repeated if necessary

+N+V

-V

-N

VAV

psa [mbar]

p d [m

bar]

7 3 1 CalculationWith no connection to the combustion chamber control pres-sure psc pd = V times psa + NWith connection to the combustion chamber control pressure psc (pd - psc) = V times (psa - psc) + N

Project planning information

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 37

pu pd

21579

4836

085310

189

142

8 Accessories8 1 Gas pressure switch DG VC for VAx VRHType Adjusting range [mbar]DG 17VC 2 to 17DG 40VC 5 to 40DG 110VC 30 to 110DG 300VC 100 to 300

Scope of delivery 1 times pressure switch for gas 2 times retaining screws 2 times sealing rings

8 2 Gas pressure switch DG VCT for VAx T VRH TType Adjusting range [WC]DG 17VCT 08 to 68DG 40VCT 2 to 16DG 110VCT 12 to 44DG 300VCT 40 to 120

Scope of delivery 1 times gas pressure switch with AWG 18 connection wires 2 times retaining screws 2 times sealing ringsMonitoring the inlet pressure pu the electrical plug of the pressure switch for gas points towards the inlet flangeMonitoring the outlet pressure pd the electrical plug of the pressure switch for gas points towards the outlet flange

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 38

A BC

D

FE

ACD

F

B

E

8 3 Bypass valvepilot gas valve VAS 18 3 1 VAS 1 attached to VADVAGVAHVAV 1Scope of delivery A 1 times bypasspilot gas valve VAS 1 B 4 times O-rings C 4 times double nuts D 4 times connection parts E 1 times mounting aidBypass valve VAS 1 F 2 times connection pipes if the bypass valve has a blind flange

at the outlet sidePilot gas valve VAS 1 F 1 times connection pipe 1 times sealing plug if the pilot gas valve

has a threaded flange at the outlet side

Accessories

8 3 2 VAS 1 attached to VADVAGVAHVAV 2 VADVAGVAHVAV 3Scope of delivery A 1 times bypasspilot gas valve VAS 1 B 4 times O-rings C 4 times spacer sleeves D 4 times connection parts E 1 times mounting aidBypass valve VAS 1 F 2 times connection pipes if the bypass valve has a blind flange

at the outlet sidePilot gas valve VAS 1 F 1 times connection pipe 1 times sealing plug if the pilot gas valve

has a threaded flange at the outlet side

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 39

2

3

456

810

20

30

405060

80100

∆p [m

bar]

005 01 02 03 05 08 1 2 3 4 51

3

2

Qn [m3h]

1

01

02

03

0405

08

003

002

6 8 10

005 01 02 03 05 08 1 2 3 4 5003 6 8 10

20

005 01 02 03 05 08 1 2 3 4 5003 6 8 10 20

30

∆p [i

nch

WC]

1

2

3

456

810

20

30

40

04

004

006

00801

02

03

0506

08

Qn [SCFH]10 40 60 100 200 3001 500 10002 3 4 5

120 306 8

21 3 4 5 6 7 8 910

8 3 3 Flow rate

The characteristic flow rate curves have been measured for bypass valve VAS 1 with connection pipe diameter 1 to 10 mm (004 to 04) and for the pilot gas valve with 10 mm (04) connection pipe

Bypass valve connection pipe diameter [mm]

Pilo

t gas

val

ve 1

0 m

m (0

4)

conn

ectio

n pi

pe d

iam

eter

Accessories gt Bypass valvepilot gas valve VAS 1

= natural gas (ρ = 080 kgm3) = propane (ρ = 201 kgm3) = air (ρ = 129 kgm3)

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 40

Accessories

8 4 Bypass valvepilot gas valve VBY 8 for VADVAGVAHVAV 1

B

C

AVBY 8

VAx 1

55

(217)40(157)

70 (276)

80(315)

Rp frac14(pilot gas valve)

For mounting on VAD VAG VAH VAV 1 and double solenoid valve VCD VCG VCH VCV 1

8 4 1 Scope of delivery VBY 8I as bypass valveA 1 times bypass valve VBY 8IB 2 times retaining screws with 4 times O-rings both retaining screws

have a bypass orificeC 1 times grease for o-rings

8 4 2 Scope of delivery VBY 8R as pilot gas valveA 1 times pilot gas valve VBY 8RB 2 times retaining screws with 5 x O-rings one retaining screw

has a bypass orifice (2 x O-rings) the other does not (3 x O-rings)

C 1 times grease for O-rings

8 4 3 SelectionType I R W Q K 6L -R -L E B D 05

VBY 8

Order exampleVBY 8RW6L-LED

8 4 4 Type codeCode DescriptionVBY Gas solenoid valve8 Nominal sizeIR

For internal gas pick-up as bypass valveFor external gas pick-up as pilot gas valve

KQW

Mains voltage 24 V DC Mains voltage 120 V AC 5060 HzMains voltage 230 V AC 5060 Hz

6L Electrical connection via plug and socket with LED-R-L

Attachment side of main valve right-hand sideAttachment side of main valve left-hand side

EB

Attached to the VAxEnclosed (separate packing unit)

05D

Nozzle diameter = 05 mm (002)Flow adjustment

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 41

2

01

02

03

05

081

3

456

810

20

30

405060

80100

∆p [m

bar]

1

3

201 02 03 05 1 2 3001 003 4

Qn [m3h]

02 03 05 1 2

01 02 05

002 006

002

002 006 1

0010006 005 01

001

0003

0006 2 3

VBY 8DVBY 805

∆p [i

nch

WC]

1

2

3

456

810

20

30

40

040506

08

1

Qn [SCFH]10 40 60 1005 2081 2 30402

01

02

03

004005006

008

Adjusting range

8 4 5 Flow rateVBY 8 D

+

-

The flow rate can be set by turning the flow rate restrictor (4 mm016 Allen screw) frac14 of a turn Flow rate 10 to 100

VBY 8 05The flow is routed through a 05 mm (002) nozzle and thus has a fixed characteristic flow rate curve Adjustment is not possible

8 4 6 Technical dataInlet pressure pu max 500 mbar (7 psig)Ambient temperature 0 to +60degC (32 to 140degF) no condensation permittedStorage temperature 0 to +40degC (32 to 104degF) no condensation permittedPower consumption 24 V = 8 W 120 V = 8 W 230 V = 95 WEnclosure IP 54

Accessories gt Bypass valvepilot gas valve VBY 8 for VADVAGVAHVAV 1

= natural gas (ρ = 080 kgm3) = propane (ρ = 201 kgm3) = air (ρ = 129 kgm3)

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 42

TC 116VB C

56(22)

49(193)

27(106)

A

A

VCx 1 VCx 2VCx 3

8 5 Tightness control TC 116Vfor VAx 1 ndash 3An adapter plate is required to attach the tightness control to the right- or left-hand side of the pressure regulator with gas solenoid valveScope of delivery A 1 times adapter plate B 2 times O-rings C 2 times retaining screwsFor attachment to left-hand side Order No 74922391 right-hand side Order No 74921995

8 6 Pressure test pointsTest points to check the inlet pressure pu and outlet pressure pdScope of delivery 1 x pressure test points with 1 x profiled sealing rings Order No 74923390

8 7 Cable gland setWhen wiring a double solenoid valve with pressure regula-tor VCx the connection boxes are to be connected using a cable gland setThe cable gland set can only be used if the connection boxes are at the same height and on the same side and if both valves are equipped either with or without a proof of closure switchVA 1 Order No 74921985 VA 2 Order No 74921986 VA 3 Order No 74921987

Accessories

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 43

A B

D

C

Accessories

8 9 Differential pressure orifice

Size PipeDN

Differential pressure orifi cewith outlet dia

1 15 17 mm 0671 20 25 mm 0981 25 30 mm 1182 40 46 mm 1813 50 58 mm 228

If pressure regulator VADVAGVAV 1 is retrofitted upstream of gas solenoid valve VAS 1 a DN 25 differential pressure orifice with outlet opening d = 30 mm (118) must be inserted at the outlet of the pressure regulatorIn the case of pressure regulator VAx 115 or VAx 120 the DN 25 differential pressure orifice must be ordered separately and retrofitted Order No 74922240

8 8 Seal set VA 1 ndash 3VA 1 Order No 74921988 VA 2 Order No 74921989 VA 3 Order No 74921990Scope of deliveryA 1 times double block seal B 2 times O-rings (flange) C 2 times O-rings (pressure switch) for pressure test pointscrew plug D 2 times sealing rings (flat sealing) and 2 times profiled sealing rings

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 44

BA

C

pd-

8 11 Attachment blockFor locked installation of pressure gauge and other acces-soriesScope of delivery A 1 times attachment block B 2 times self-tapping screws for installation C 2 times O-rings

Accessories

8 10 Retaining frameIn the event that a pressure regulator VAx is installed at a later point upstream of a gas solenoid valve VAS a measur-ing orifice VMO or a fine-adjusting valve VMV the retaining frame must be fitted at the inlet of the second device in order to fasten the differential pressure orifice at the regulator outlet Order the retaining frame separatelyRetaining frame for Size 1 Order No 74923029 Size 2 Order No 74923030 Size 3 Order No 74923031

8 12 Gas control lineFine-adjusting valve VMV can be installed on the flow rate regulator VAH for fine adjustment of the gas flow rateThe gas control line for gas outlet pressure pd- is available with 2 18 compression fittingsSize 1 Order No 74924458 Size 2 Order No 74924459

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 45

8 13 Measuring orifice VMOThe measuring orifice VMO is designed to reduce the gas and air flow rates and is installed downstream of the valVario control The measuring orifice is available with Rp internal thread (NPT internal thread) or flange to ISO 7005See wwwdocuthekcom Elster Kromschroumlder Krom-schroumlder LBE Products 03 Valves and butterfly valves valVario accessories Type of document Technical Informa-tion VMO

Accessories

8 14 Filter module VMFUsing the filter module VMF the gas flow upstream of the gas solenoid valve VAS and the airgas ratio control is cleaned The filter module is available with Rp internal thread (NPT internal thread) or flange to ISO 7005 and can also be supplied with fitted pressure switch as an optionSee wwwdocuthekcom Elster Kromschroumlder Krom-schroumlder LBE Products 03 Valves and butterfly valves valVario accessories Type of document Technical Informa-tion VMF

8 15 Fine-adjusting valve VMVThe flow rate is set using the fine-adjusting valve VMV The fine-adjusting valve is available with Rp internal thread (NPT internal thread) or flange to ISO 7005See wwwdocuthekcom Elster Kromschroumlder Krom-schroumlder LBE Products 03 Valves and butterfly valves valVario accessories Type of document Technical Infor-mation VMV

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 46

9 Technical dataGas types natural gas LPG (gaseous) biologically produced methane (max 01 -by-vol H2S) or clean air other gases on request The gas must be clean and dry in all temperature conditions and must not contain condensateCE and FM approved UL listed max inlet pressure pu 10 ndash 500 mbar (4 ndash 200 WC) FM approved (230 V AC 120 V AC 24 V DC) non opera-tional pressure 700 mbar (10 psig)ANSICSA approved (230 V AC 120 V AC 24 V DC) up to 350 mbar (5 psig)Opening time of the solenoid valve quick opening le 05 s Closing time quick closing lt 1 sMedium and ambient temperatures -20 to +60degC (-4 to +140degF) no condensation permittedStorage temperature -20 to +40degC (-4 to +104degF)Enclosure IP 65Valve housing aluminium valve seal NBRConnection flanges with internal thread Rp to ISO 7-1 NPT to ANSIASMESafety valve Class A to EN 161 Factory Mutual Research Class 7400 Process Control Valves (230 V AC 120 V AC 24 V DC) ANSI Z2121 and CSA 65 ANSI Z2118 and CSA 63Control class A to EN 88-1Control range up to 101

Mains voltage 230 V AC +10-15 5060 Hz 200 V AC +10-15 5060 Hz 120 V AC +10-15 5060 Hz 100 V AC +10-15 5060 Hz 24 V DC plusmn20Duty cycle 100Power factor of the solenoid coil cos φ = 09Power consumption

Type Voltage Power

VAx 1

24 V DC 25 W ndash100 V AC 25 W (26 VA)120 V AC 25 W (26 VA)200 V AC 25 W (26 VA)230 V AC 25 W (26 VA)

VAx 2 VAx 3

24 V DC 36 W ndash100 V AC 36 W (40 VA)120 V AC 40 W (44 VA)200 V AC 40 W (44 VA)230 V AC 40 W (44 VA)

VBY24 V DC 8 W ndash

120 V AC 8 W ndash230 V AC 95 W ndash

Cable gland M20 times 15Electrical connection cable with max 25 mm2 (AWG 12) or plug with socket to EN 175301-803

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 47

Position indicator contact rating

Type Voltage Min current(resistive load)

Max current(resistive load)

VAxS VCxS 12 ndash 250 V AC 5060 Hz 100 mA 3 AVAxG VCxG 12 ndash 30 V DC 2 mA 01 A

Position indicator switching frequency max 5 times per minute

Switching current [A]

Switching cyclescos φ = 1 cos φ = 06

01 500000 50000005 300000 250000

1 200000 1000003 100000 ndash

Limited to max 200000 cycles for heating systems

9 1 VADOutlet pressure pd VAD-25 25 ndash 25 mbar (1 ndash 10 WC) VAD-50 20 ndash 50 mbar (8 ndash 20 WC) VAD-100 35 ndash 100 mbar (14 ndash 40 WC)Combustion chamber control pressure psc (connection psa)

-20 to +20 mbar (-78 to +78 WC)

VAD

pu

pd

(psa)

9 2 VAGOutlet pressure pd 05 ndash 100 mbar (02 ndash 40 WC)Air control pressure psa 05 ndash 100 mbar (02 ndash 40 WC)

Adjusting range at low fire plusmn5 mbar (plusmn2 WC)Transmission ratio of gas to air 11The inlet pressure must always be higher than the air control pressure psa + pressure loss ∆p + 5 mbar (2 WC)

VAGpd

pu

psa

psa

VAGK 1 x 18 coupling for plastic hose (internal dia 39 mm (015) external dia 61 mm (024)) or VAGE 1 x 18 compression fitting for 6 times 1 tube or VAGA 1 x NPT 18 adapter or VAGN zero governor with breathing orifice

9 3 VAH VRHAir control pressure psa 06 ndash 100 mbar (024 ndash 40 WC) Differential air pressure ∆psa (psa - psa-) 06 ndash 50 mbar (024 ndash 197 WC) Differential gas pressure ∆pd (pd - pd-) 06 ndash 50 mbar (024 ndash 197 WC)Transmission ratio of gas to air 11The inlet pressure must always be higher than the differen-tial air pressure ∆psa + pressure loss ∆p + max gas pres-sure on burner + 5 mbar (2 WC)Adjusting range at low fire plusmn5 mbar (plusmn2 WC)

Technical data

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 48

VAHVRH

pd-

pu

psa-

psa

Connection of the air control pressure psaVAHE VRHE 3 x 18 compression fitting for 6 times 1 tube or VAHA VRHA 3 x NPT 18 adapter

9 4 VAVOutlet pressure pd 05 ndash 30 mbar (02 ndash 117 WC)Air control pressure psa 04 ndash 30 mbar (015 ndash 117 WC)Combustion chamber control pressure psc

-20 to +20 mbar (-78 to +78 WC)Min control pressure differential psa - psc 04 mbar (015 WC)Min pressure differential pd - psc 05 mbar (02 WC)Adjusting range at low fire plusmn15 mbar (plusmn06 WC)Transmission ratio of gas to air 061 to 31The inlet pressure pu must always be higher than the air control pressure psa times transmission ratio V + pressure loss ∆p + 15 mbar (06 WC)

pu

pd psapsc

VAV

VAVK 2 x plastic hose couplings (internal dia 39 mm (015) external dia 61 mm (024)) or VAVE 2 x 18 compression fitting for 6 times 1 tube or VAVA 2 x NPT 18 adapter

Technical data

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 49

9 5 Safety-specific characteristic values for VAx 1 ndash 3For SILSuitable for Safety Integrity Level SIL 1 2 3

Diagnostic coverage DC 0

Type of subsystem Type A to EN 61508-2 74312

Operating mode High demand mode pursu-ant to EN 61508-4 3512

For PLSuitable for Performance Level PL a b c d e

Category B 1 2 3 4Common cause failure CCF gt 65Application of essential safety requirements Satisfied

Application of tried-and-tested safety requirements Satisfied

For SIL and PL

B10d value

Operating cyclesVAD VAG VAV VAH 1 10094360VAD VAG VAV VAH 2 8229021VAD VAG VAV VAH 3 6363683

Hardware fault tolerance (1 valve) HFT 0

Hardware fault tolerance (2 valves) HFT 1

Safe failure fraction SFF gt 90Fraction of undetected com-mon cause failures β ge 2

Max service life under operating conditions10 years after date of production plus max 12 year in stor-age prior to first use or once the given number of operating cycles has been reached depending on which is achieved firstThe devices are suitable for single-channel systems (HFT = 0) up to SIL 2PL d and up to SIL 3PL e when two re-dundant valves are installed in a double-channel architecture (HFT = 1) provided that the complete system complies with the requirements of EN 61508ISO 13849

For a glossary of terms see page 53 (Glossary)

Technical data

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 50

nop 1hnop 1a

sB10d

T10d aPFHD (1 VAx) 1h

PFHD (2 VAx) 1h

PFDavg (1 VAx)

PFDavg (2 VAx)

Technical data gt Safety-specific characteristic values for VAx 1 ndash 3

9 5 1 Determining the PFHD value the λD value and the MTTFd value

PFHD = λD = x nop= 1MTTFd

01B10d

PFDavg = x λD x 24 x 365 x T10d 12

Type

Cycle time

suitable for

suitable for

PFHD = Probability of dangerous failure (HDM = high de-mand mode) [1hour]PFDavg = Average probability of dangerous failure on de-mand (LDM = low demand mode)λD = Mean dangerous failure rate [1hour]MTTFd = Mean time to dangerous failure [hours]nop = Demand rate (mean number of annual operations) [1hour]

9 5 2 Calculating the PFHD and PFDavg

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 51

VAD VAG VAH VAV

H1

Rp frac14(NPT frac14)

H2

E

LF

F

H4

H3

B

VAxS VAxF

L2G

G

Technical data

9 6 Dimensions

Type

Connec-tion Dimensions

WeightRpNPT DN

L L2 E F G H1 H2 H3 H4 Bmm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch kg lbs

VAx 115 12 15 75 29 ndash ndash 75 29 15 06 ndash ndash 143 56 82 32 161 63 117 46 97 38 18 40VAH 115 12 15 75 29 ndash ndash 75 29 15 06 ndash ndash 143 56 100 39 161 63 135 53 97 38 2 44VAx 120 34 20 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 82 33 161 63 117 46 97 38 19 42VAH 120 34 20 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 100 39 161 63 135 53 97 38 21 46VAx 125 1 25 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 82 33 161 63 117 46 97 38 19 42VAH 125 1 25 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 100 39 161 63 135 53 97 38 21 46VAx 240 112 40 128 50 200 79 85 33 29 11 66 26 170 67 112 44 191 75 162 64 125 49 44 97VAH 240 112 40 128 50 200 79 85 33 29 11 66 26 170 67 132 52 191 75 182 72 125 49 47 104VAx 350 2 50 155 61 230 91 85 33 36 14 74 29 180 70 135 53 201 79 196 77 160 63 61 134VAH 350 2 50 155 61 230 91 85 33 36 14 74 29 180 70 156 61 201 79 217 85 160 63 64 141

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 52

10 Converting unitssee wwwadlatusorg

11 Maintenance cyclesAt least once per annum at least twice per annum for biologi-cally produced methaneIf the flow rate drops clean the strainer

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 53

12 Glossary12 1 Diagnostic coverage DCMeasure of the effectiveness of diagnostics which may be determined as the ratio between the failure rate of detected dangerous failures and the failure rate of total dangerous failuresNOTE Diagnostic coverage can exist for the whole or parts of a safety-related system For example diagnostic cover-age could exist for sensors andor logic system andor final elements Unit see EN ISO 13849-12008

12 2 Mode of operationHigh demand mode or continuous modeOperating mode where the frequency of demands for opera-tion made on a safety-related system is greater than one per year or greater than twice the proof-test frequencysee EN 61508-42008

12 3 CategoryClassification of the safety-related parts of a control system in respect of their resistance to faults and their subsequent behaviour in the fault condition and which is achieved by the structural arrangement of the parts fault detection andor by their reliability see EN ISO 13849-12008

12 4 Common cause failure CCFFailures of different items resulting from a single event where these failures are not consequences of each othersee EN ISO 13849-12008

12 5 Fraction of undetected common cause failures β Fraction of undetected failures of redundant components due to a single event whereby these failures are not based on mutual causesNOTE β is expressed as a fraction in the equations and as a percentage elsewheresee EN 61508-62010

12 6 B10d valueMean number of cycles until 10 of the components fail dan-gerouslysee EN ISO 13849-12008

12 7 T10d valueMean time until 10 of the components fail dangerouslysee EN ISO 13849-12008

12 8 Hardware fault tolerance HFTA hardware fault tolerance of N means that N + 1 is the mini-mum number of faults that could cause a loss of the safety functionsee IEC 61508-22010

12 9 Mean dangerous failure rate λD Mean rate of dangerous failures during operation time (T10d) Unit 1hsee EN ISO 13849-12008

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 54

12 10 Safe failure fraction SFFFraction of safe failures related to all failures which are as-sumed to appearsee EN 13611A22011

12 11 Probability of dangerous failure PFHD Value describing the likelihood of dangerous failure per hour of a component for high demand mode or continuous mode Unit 1hsee EN 13611A22011

12 12 Mean time to dangerous failure MTTFd Expectation of the mean time to dangerous failuresee EN ISO 13849-12008

12 13 Demand rate nop Mean number of annual operationssee EN ISO 13849-12008

12 14 Average probability of dangerous failure on demand PFDavg (LDM = 1 ndash 10 switching cyclesyear)Average probability of a dangerous failure of the safety function on demand (LDM = low demand mode)see EN 61508-6

Glossary

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415

Finally we are offering you the opportunity to assess this ldquoTechnical Information (TI)rdquo and to give us your opinion so that we can improve our documents further and suit them to your needs

ClarityFound information quicklySearched for a long timeDidnrsquot find informationWhat is missing

ComprehensionCoherentToo complicatedNo answer

ScopeToo littleSufficientToo wideNo answer

No answer

NavigationI can find my way aroundI got ldquolostrdquoNo answer

UseTo get to know the productTo choose a productPlanningTo look for information

My scope of functionsTechnical departmentSalesNo answer

Remarks

(Adobe Reader 7 or higher required) wwwadobecom

Elster GmbH Postfach 2809 middot 49018 Osnabruumlck Strotheweg 1 middot 49504 Lotte (Buumlren) GermanyT +49 541 1214-0 F +49 541 1214-370 infokromschroedercomwwwkromschroedercom

The current addresses of our international agents are available on the Internetwwwkromschroederdeindexphpid=718ampL=1

We reserve the right to make technical modifications in the interests of progressCopyright copy 2015 Elster GmbH All rights reserved

Contact

Feedback

0325

0530

  • Pressure regulators with solenoid valve VAD VAG VAV VAH
  • Flow rate regulator VRH
  • Pressure regulators with double solenoid valve VCD VCG VCV VCH
  • Contents
  • 1 Application
    • 11 Examples of application
      • 111 Constant pressure control
      • 112 Constant pressure control with two gas solenoid valves
      • 113 Constant pressure control with max pressure switch
      • 114 Constant pressure control with non-controlled pilot gas outlet
      • 115 Modulating control
      • 116 Modulating control with two gas solenoid valves
      • 117 Modulating control with two gas solenoid valves and inlet pressure switch
      • 118 HighLow control
      • 119 Zero pressure control
      • 1110 Staged flow rate control
      • 1111 Continuous or staged flow rate control
      • 1112 Modulating control with variable airgas ratio control with gas solenoid valve
      • 1113 Modulating control in residential heat generation
          • 2 Certification
          • 3 Function
            • 31 VAD VAG VAH VRH VAV
              • 311 Pressure regulator for gas VAD
              • 312 Airgas ratio control VAG
              • 313 Flow rate regulators VAH VRH
              • 314 Variable airgas ratio control VAV
              • 315 Pressure regulator with gas solenoid valve VAxS position indicator with visual indicator
                • 32 Animation
                • 33 Connection diagram
                  • 331 VAx with M20 cable gland
                  • 332 VAx with plug
                  • 333 VAS with VADVAGVAHVAV with M20 cable gland
                  • 334 VAS with VADVAGVAHVAV with plug
                      • 4 Replacement possibilities for MODULINE pressure regulators with gas solenoid valve
                        • 41 GVS GVI GVIB GVR and GVRH are to be replaced by VAD VAG VAG+VAS VAH and VAV
                          • 5 Flow rate
                            • 51 Selection example for VAD
                              • 511 Calculate VAD
                                • 52 Selection example for VAG VAH VRH VAV
                                  • 521 CalculateVAG VxHVAV
                                    • 53 Selection example for zero governor VAGN
                                      • 531 Calculate VAGN
                                          • 6 Selection
                                            • 61 Selection table for pressure regulator with solenoid valve VAD
                                            • 62 Type code for VAD
                                            • 63 Selection table for airgas ratio control with solenoid valve VAG flow rate regulators VAH VRH
                                            • 64 Type code for VAG VAH VRH
                                            • 65 Selection table for variable airgas ratio control with solenoid valve VAV
                                            • 66 Type code for VAV
                                            • 67 Accessories
                                              • 7 Project planning information
                                                • 71 Installation
                                                  • 711 Installation position
                                                    • 72 Setting the low-fire rate on VAG VAH VRH VAV
                                                    • 73 Setting the high-fire rate on VAV
                                                      • 731 Calculation
                                                          • 8 Accessories
                                                            • 81 Gas pressure switch DGVC for VAx VRH
                                                            • 82 Gas pressure switch DGVCT for VAxT VRHT
                                                            • 83 Bypass valvepilot gas valve VAS 1
                                                              • 831 VAS 1 attached to VADVAGVAHVAV 1
                                                              • 832 VAS 1 attached to VADVAGVAHVAV 2 VADVAGVAHVAV 3
                                                              • 833 Flow rate
                                                                • 84 Bypass valvepilot gas valve VBY 8 for VADVAGVAHVAV 1
                                                                  • 841 Scope of delivery VBY 8I as bypass valve
                                                                  • 842 Scope of delivery VBY 8R as pilot gas valve
                                                                  • 843 Selection
                                                                  • 844 Type code
                                                                  • 845 Flow rate
                                                                  • 846 Technical data
                                                                    • 85 Tightness control TC 116V
                                                                    • 86 Pressure test points
                                                                    • 87 Cable gland set
                                                                    • 88 Seal set VA 1thinspndashthinsp3
                                                                    • 89 Differential pressure orifice
                                                                    • 810 Retaining frame
                                                                    • 811 Attachment block
                                                                    • 812 Gas control line
                                                                    • 813 Measuring orifice VMO
                                                                    • 814 Filter module VMF
                                                                    • 815 Fine-adjusting valve VMV
                                                                      • 9 Technical data
                                                                        • 91 VAD
                                                                        • 92 VAG
                                                                        • 93 VAH VRH
                                                                        • 94 VAV
                                                                        • 95 Safety-specific characteristic values for VAx 1thinspndashthinsp3
                                                                          • 951 Determining the PFHD value the λD value and the MTTFd value
                                                                          • 952 Calculating the PFHD and PFDavg
                                                                            • 96 Dimensions
                                                                              • 10 Converting units
                                                                              • 11 Maintenance cycles
                                                                              • 12 Glossary
                                                                                • 121 Diagnostic coverage DC
                                                                                • 122 Mode of operation
                                                                                • 123 Category
                                                                                • 124 Common cause failure CCF
                                                                                • 125 Fraction of undetected common cause failures β
                                                                                • 126 B10d value
                                                                                • 127 T10d value
                                                                                • 128 Hardware fault tolerance HFT
                                                                                • 129 Mean dangerous failure rate λD
                                                                                • 1210 Safe failure fraction SFF
                                                                                • 1211 Probability of dangerous failure PFHD
                                                                                • 1212 Mean time to dangerous failure MTTFd
                                                                                • 1213 Demand rate nop
                                                                                • 1214 Average probability of dangerous failure on demand PFDavg
                                                                                  • Feedback
                                                                                  • Contact
                                                                                      1. naechste_Seite 24
                                                                                      2. naechste Seite 18
                                                                                      3. naechste Seite 6
                                                                                      4. naechste Seite 16
                                                                                      5. naechste Seite 14
                                                                                      6. naechste Seite 25
                                                                                      7. naechste_Seite 11
                                                                                      8. naechste_Seite 17
                                                                                      9. fbArbeitspunkt_Min Ja
                                                                                      10. fbArbeitspunkt Ja
                                                                                      11. ftProgramm Standard-Programm
                                                                                      12. fz_kv
                                                                                      13. fz_pe 80
                                                                                      14. fz_pG 60
                                                                                      15. fzDelta_p_Soll 20
                                                                                      16. ftEinheit_Druck mbar
                                                                                      17. fatTyp [115]
                                                                                      18. fbArbeitspunkt_Min_2 Ja
                                                                                      19. fbArbeitspunkt_2 Ja
                                                                                      20. ftRegler_Typ VAG
                                                                                      21. ftProgramm_2 Standard-Programm
                                                                                      22. fz_kv_2
                                                                                      23. fatMedium [08]
                                                                                      24. fzDichte 08
                                                                                      25. ftEinheit_Dichte kgm3
                                                                                      26. fzV_Norm 30
                                                                                      27. ftEinheit_Volstrom m3h
                                                                                      28. fz_pe_2 80
                                                                                      29. fz_pG_2 60
                                                                                      30. fzDelta_p_Soll_2 20
                                                                                      31. ftEinheit_Druck2 [mbar]
                                                                                      32. ftEinheit_Geschw [ms]
                                                                                      33. fatTyp_2 [10954451150103322]
                                                                                      34. fbArbeitspunkt_Min_3 Ja
                                                                                      35. fbArbeitspunkt_3 Ja
                                                                                      36. ftProgramm_3 Standard-Programm
                                                                                      37. fz_kv_3
                                                                                      38. fz_pe_3 20
                                                                                      39. fz_pG_3 0
                                                                                      40. fzDelta_p_Soll_3 20
                                                                                      41. fatTyp_3 [123]
                                                                                      42. fatSchaltleistung [6363683]
                                                                                      43. fz_nop_Stunde 1
                                                                                      44. fz_nop_Jahr 8760
                                                                                      45. fzZyklus 3600
                                                                                      46. fzB10d 6363683
                                                                                      47. fzT10d 10
                                                                                      48. fzPFHd_1V 15714170551864384e-8
                                                                                      49. fzPFDavg_1V
                                                                                      50. ftGeeignet_1V PL d SIL 2
                                                                                      51. fzPFHd_2V 33505832253532625e-10
                                                                                      52. fzPFDavg_2V
                                                                                      53. ftGeeignet_2V PL e SIL 3
                                                                                      54. ftUebersicht Off
                                                                                      55. ftVerstaendlichkeit Off
                                                                                      56. ftFehlende_Info
                                                                                      57. ftUmfang Off
                                                                                      58. ftVerwendung_1 Off
                                                                                      59. ftVerwendung_2 Off
                                                                                      60. ftVerwendung_3 Off
                                                                                      61. ftVerwendung_4 Off
                                                                                      62. ftNavigation Off
                                                                                      63. ftTaetigkeitsbereich Off
                                                                                      64. ftBemerkung
                                                                                      65. Michael Rehkamp Elster Kromschroumlder>btnSenden
Page 13: VAD, VAG, VAV, VAH, VRH, VCD, VCG, VCV, VCH · PDF fileVAD, VAG, VAH, VAV, VRH, VCD, VCG, VCV, VCH · Edition 04.15 6 VAD VAD VAS 1 .1 Examples of application 1 .1 .1 Constant pressure

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 13

DGCmin

PZL

psa

psc

VAS VAV

1 1 13 Modulating control in residential heat generationThis application shows the variable airgas ratio control with solenoid valve VAV fitted to a modulating-controlled forced draught burnerThe combustion air volume is set via a butterfly valve for air or by adjusting the fan speed

Application gt Examples of application

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 14

2 CertificationCertificates ndash see Docuthek

VAD VAG VAV VAH certified to SIL and PL

For systems up to SIL 3 pursuant to EN 61508 and PL e pursu-ant to ISO 13849

VAD VAG VAV VAHEU certified pursuant to

ndash Gas Appliances Directive (2009142EC) in conjunction with EN 13611 EN 161 EN 88-1 EN 126 and EN 1854

Meets the requirements of thendash Low Voltage Directive (200695EC)ndash EMC Directive (2004108EC)

VAD VAG VAV VAH FM approved

Factory Mutual Research Class 7400 Process Control Valves Designed for applications pursuant to NFPA 85 and NFPA 86 www approvalguide com

VAD VAG ANSICSA approved

American National Standards InstituteCanadian Standards Association ndash ANSI Z21 21CSA 6 5 ANSI Z21 18 and CSA 6 3

wwwcsagrouporg ndash Class number 3371-83 (natural gas LPG) 3371-03 (natural gas propane)

VAD VAG VAV UL listed

Underwriters Laboratories ndash UL 429 ldquoElectrically operated valvesrdquo wwwulcom Tools (at the bottom of the page) Online Certifications Directory

VAD VAG VAV AGA approved

AGA

Australian Gas Association Approval No 5319 httpwww aga asn auproduct_directory

Eurasian Customs Union

The product VAD VAG VAV VAH VCD VCG VCV VCH meets the technical specifications of the Eurasian Customs Union (the Russian Federation Belarus Kazakhstan)

Approval does not apply for 100 V AC and 200 V AC

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 15

3 Function3 1 VAD VAG VAH VRH VAVThe regulator is closed when it is disconnected from the power supplyOpening connect the system to the electrical power supply (alternating voltage will be rectified) The blue LED lights up The coilrsquos magnetic field pulls the armature upwards and clears the supply nozzle for the gas inlet pressure pu The gas passes through the internal impulse tube to the adjustment diaphragm and then pushes the valve disc open The outlet pressure is applied to the servo diaphragm via the internal feedback

The servo regulator then maintains a set constant outlet pres-sure pd

3 1 1 Pressure regulator for gas VADThe nominal outlet pressure pd is defined by the control spring

Servoregulator

Valve

Armature

Valve disc

Adjustmentdiaphragm

Servodiaphragm

Internalfeedback

Controlspring

Solenoid coil

Supplynozzle

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 16

3 1 2 Airgas ratio control VAGThe airgas ratio control VAG controls the outlet pressure pd depending on the variable air control pressure psaThe ratio of gas pressure to air pressure remains constant 11 The VAG is suitable for a control range up to 101If the burner operates at low-fire rate the gasair mixture can be changed by adjusting the zero point spring ldquoNrdquo

Function

psa

pd

Zero point setting N zero point spring

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 17

Function

3 1 3 Flow rate regulators VAH VRHThe flow rate regulators VAH VRH control the gas flow rate depending on the variable air flow rate The ratio of gas flow rate to air flow rate remains constant If the burner operates at low-fire rate the gasair mixture can be changed by adjusting the zero point spring ldquoNrdquoIn addition flow rate regulator VAH is designed as a gas solenoid valve and shuts off the gas or air supply safely

psa

psa-

pd-

pdInternal feedback

Zero point setting N zero point spring

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 18

3 1 4 Variable airgas ratio control VAVThe servo regulator maintains a set constant outlet pressure pd The variable airgas ratio control VAV controls the outlet pressure pd depending on the variable air control pressure psa The ratio of gas pressure to air pressure remains constantThe settings N and V can be changed and read off from both sides of the unit using the adjusting screwsThe ratio of gas pressure to air pressure at low-fire rate can be changed by adjusting the zero point setting N By turning the adjusting screw ldquoNrdquo the force of the zero point spring and thus the zero point is changed by plusmn 15 mbar (06 WC) see page 34 (Project planning information)The high-fire rate is set by turning the adjusting screw ldquoVrdquo until the required flue gas values are achieved see page 34 (Project planning information) The ratio of gas pressure to air pressure can be set from 061 to 31The settings N and V influence each other and the adjustment process must be repeated if necessaryThe outlet pressure pd is applied to the servo diaphragm via the internal feedback The combustion chamber control pres-sure psc is transmitted to the space under the air and servo diaphragms via an impulse lineThe pressure differential psa - psc is achieved on the air diaphragm and the pressure differential pd - psc on the servo diaphragm This ensures that pressure fluctuations in the combustion cham-ber can be compensated The flue gas values remain constant in the case of fluctuations in the combustion chamber pressure (pd - psc) = (psa - psc) times V + N

Function

pdpsc

psa

Air diaphragm

Transmission ratio V

Zero point setting N zero point spring

Internalfeedback

Adjustment diaphragm

Servo diaphragm

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 19

1 COM

2 NO

3 NC

3 1 5 Pressure regulator with gas solenoid valve VAx S position indicator with visual indicatorOpening when the pressure regulator is opened the posi-tion indicator switches The visual indicator is activated The ldquoopenrdquo signal is marked in red The double valve seat opens to release the volume of gasClosing the pressure regulator VAx is disconnected from the voltage supply and the closing spring presses the double valve disc on to the valve seat The position indicator is actuated The visual indicator is white for ldquoclosedrdquoThe actuator cannot be rotated on a pressure regulator with a position indicator and a visual indicatorNOTE NFPA 86 ndash the following must be taken into account as soon as the capacity of the pilot or main burner exceeds 117 kW (400000 BTUh) safety shut-off valve VASS must be fitted with a proof of closure overtravel switch with a visual position indicator and the burner-side pressure regulator with gas solenoid valve VAxS must also be fitted with a position indicator with visual indicator The closed position can be verified using the proof of closure switch of the gas solenoid valve VASS

Function

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 20

3 2 AnimationThe interactive animation shows the function of the valVario controls VADVAGVAHVAVClick on the picture The animation can be controlled using the control bar at the bottom of the window (as on a DVD player) To play the animation you will need Adobe Reader 7 or a newer version If you do not have Adobe Reader on your system you can download it from the Internet

Go to wwwadobecom click on ldquoAdobe Readerrdquo at the bottom of the page and follow the instructionsIf the animation does not start to play you can download it from the document library (wwwdocuthekcom) as an inde-pendent application

Function

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 21

3 3 Connection diagramWiring to EN 60204-1Connection diagram for VAxS with position indicator ndash see page 19 (Pressure regulator with gas solenoid valve VAxS position indicator with visual indicator)

3 3 1 VAx with M20 cable gland

L1 (+)

N (ndash)

3 3 2 VAx with plug

1 = N (-)

2 = L1 (+)

3 3 3 VAS with VADVAGVAHVAV with M20 cable glandL1V1 (+)

N (-)

L1V2 (+)

3 3 4 VAS with VADVAGVAHVAV with plug2 = L1V1 (+)

1 = N (-)

3 = L1V2 (+)

Function

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 22

4 Replacement possibilities for MODULINE pressure regulators with gas solenoid valve4 1 GVS GVI GVIB GVR and GVRH are to be replaced by VAD VAG VAG+VAS VAH and VAV

Type TypeGVS Pressure regulator with gas solenoid valve Pressure regulator with gas solenoid valve VADGVI Airgas ratio control with gas solenoid valve Airgas ratio control with gas solenoid valve VAG

GVIB Airgas ratio control with gas solenoid valve and bypass valve

Airgas ratio control with gas solenoid valve and bypass valve VAG+VAS

GVRH Flow rate regulator with gas solenoid valve Flow rate regulator with gas solenoid valve VAHGVR Variable airgas ratio control with gas solenoid valve Variable airgas ratio control with solenoid valve VAV115125 Flange 38 Size 115

Size 125 on request

115125 Flange frac12 Size 115

Size 125 Size 1 DN 15 115

115125 Flange frac34 Size 115

Size 125 Size 1 DN 20 120

115125 Flange 1 Size 115

Size 125 Size 1 DN 25 125

232240 Flange 1 Size 232

Size 240 on request

232240 Flange 1frac12 Size 232

Size 240 Size 2 DN 40 240

350 Flange 1frac12 Size 350 on request350 Flange 2 Size 350 Size 3 DN 50 350ML MODULINE + Rp internal thread connection fl anges Rp internal thread RTML MODULINE + NPT internal thread connection fl anges NPT internal thread N01 pu max 100 mbar (15 psig) pu max 500 mbar (7 psig) 02 200 mbar (3 psig) 500 mbar (7 psig)

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 23

Replacement possibilities for MODULINE pressure regulators with gas solenoid valve gt GVS GVI GVIB GVR and GVRH are to be replaced by VAD VAG VAG+VAS VAH and VAV

ContinuationType Type

Quick opening Quick opening NF1 Control ratio 11 Control ratio 11 K Mains voltage 24 V DC Mains voltage 24 V DC K

ndash 100 V AC PQ 120 V AC 120 V AC Q

ndash 200 V AC YT 220240 V AC 230 V AC W3 Electrical connection via terminals Electrical connection via terminals 6 Electrical connection via socket Electrical connection via socket 9 Metal terminal connection box Electrical connection via terminals S Position indicator Position indicator with visual indicator SG Position indicator for 24 V Position indicator for 24 V with visual indicator GM Suitable for biologically produced methane Suitable for biologically produced methane

Pressure test point at the inlet Pressure test point at the inlet and outlet Outlet pressure pd -25

Outlet pressure pd 25 ndash 25 mbar (1 ndash 10 WC)

2 ndash 90 mbar (08 ndash 36 WC) 20 ndash 50 mbar (8 ndash 20 WC) -5035 ndash 100 mbar (14 ndash 40 WC) -100Standard seat A

ExampleGVS 350ML01T3with Rp 2 connection flanges

ExampleVAD 350RNW-100A

with test points

= standard = available Pressure test points may be attached at the left- andor right-hand side Position indicator with visual indicator can be attached at the left- or right-hand side

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 24

∆p [i

nch

WC]

Qn [SCFH]100 400 600 4000 60001000 200020 30 40 50 200 3006015 80

1

08

1

2

3

4

56

8

10

20

30

40

5060

80

100

200

∆p [m

bar]

5

8

3

20

10

30

40

80

60

300

400

50

04 06 1 2 3 4 5 808 10 20 30 402

03 60 100 200

100

200

500

1

3

2

04 06 08 1 2 3 4 5 6 8 10 20 30 40

04 06 08 1 2 3 4 5 6 8 10

200

80 10020 3003

03Qn [m3h]

02

50 60 80 100

40 50 60

VAD

115

B

VAD

120

AVA

D 12

5A

P1P2

VAD

240

AVA

D 35

0A

= natural gas (ρ = 080 kgm3) = propane (ρ = 201 kgm3) = air (ρ = 129 kgm3)

The characteristic flow rate curves have been meas-ured with the specified flanges and a fitted strainer If two or more valves are combined the pressure loss of each additional valve drops by approx 5

metric imperial

Enter densityFlow rate Qn

Inlet pressure pu

Outlet pressure pd

Product RV v

Pressure loss ∆p

∆pmin

5 Flow rate5 1 Selection example for VADNatural gas Flow rate Qmax = 30 m3h Inlet pressure pu = 80 mbar Outlet pressure pd = 60 mbarThe desired control ratio from high-fire to low-fire rate is RV = 101High fire ∆p = pu - pd = 20 mbar Point P1Low fire Point P2 Qmin = 26 m3h at ∆p = 20 mbar RV = Qmax Qmin = 1151

Point P1 and point P2 must be within the working range of a unit size We recommend that you select the smallest size to achieve the best control properties

5 1 1 Calculate VAD

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 25

∆p [i

nch

WC]

Qn [SCFH]100 400 600 4000 60001000 200020 30 40 50 200 3006015 80

1

08

1

2

3

4

56

8

10

20

30

40

5060

80

100

200

∆p [m

bar]

5

8

3

20

10

30

40

80

60

300

400

50

04 06 1 2 3 4 5 808 10 20 30 402

03 60 100 200

100

200

500

1

3

2

04 06 08 1 2 3 4 5 6 8 10 20 30 40

04 06 08 1 2 3 4 5 6 8 10

200

80 10020 3003

03Qn [m3h]

02

50 60 80 100

40 50 60

= pd min lt 5 mbar

VAG

VxH

VAV

115

BVA

GV

xHV

AV 12

0A

VAG

VxH

VAV

125

A

P1

P2

VAG

VxH

VAV

240

AVA

GV

xHV

AV 3

50A

= natural gas (ρ = 080 kgm3) = propane (ρ = 201 kgm3) = air (ρ = 129 kgm3)

The characteristic flow rate curves have been meas-ured with the specified flanges and a fitted strainer If two or more valves are combined the pressure loss of each additional valve drops by approx 5

5 2 Selection example for VAG VAH VRH VAV Natural gas Flow rate Qmax = 30 m3h Inlet pressure pu = 80 mbar Outlet pressure pd max VAG = 60 mbarThe desired control ratio from high-fire to low-fire rate is RV = 101High fire ∆p = pu - pd max = 20 mbar Point P1Low fire pd min = pd max RV2 = 06 mbar Qmin = Qmax RV = 3 m3h ∆p = pu - pd min = 794 mbar Point P2 select VAG 120APoint P1 and point P2 must be within the working range of a unit size We recommend that you select the smallest size to achieve the best control properties

metric imperial

Enter densityFlow rate Qn

Inlet pressure pu

Outlet pressure pd

Product RV v

5 2 1 Calculate VAG VxH VAV

Pressure loss ∆p

∆pmin

Flow rate

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 26

∆p [i

nch

WC]

Qn [SCFH]100 400 600 4000 60001000 200020 30 40 50 200 3006015 80

1

08

1

2

3

4

56

8

10

20

30

40

5060

80

100

200

∆p [m

bar]

5

8

3

20

10

30

40

80

60

300

400

50

04 06 2 3 4 5 808 10 20 30 402

03 60 100 200

100

200

500

1

3

2

04 06 08 1 2 3 4 5 6 8 10 20 30 40

04 06 08 1 2 3 4 5 6 8 10

200

80 10020 3003

03Qn [m3h]

02

50 60 80 100

40 50 60

VAG

115

N

P1VAG

125

N

VAG

120

N

VAG

240

NP2

VAG

350

N

= natural gas (ρ = 080 kgm3) = propane (ρ = 201 kgm3) = air (ρ = 129 kgm3)

The characteristic flow rate curves have been meas-ured with the specified flanges and a fitted strainer If two or more valves are combined the pressure loss of each additional valve drops by approx 5

5 3 Selection example for zero governor VAG NNatural gas Flow rate Qmax = 30 m3h Inlet pressure pu = 20 mbar Outlet pressure pd = 0 mbar (atmospheric pressure)The desired control ratio from high-fire to low-fire rate is RV = 101High fire ∆p = pu - pd max = 20 mbar Point P1Low fire Point P2 Qmin = 24 m3h at ∆p = 20 mbar RV = Qmax Qmin = 1231Point P1 and point P2 must be within the working range of a unit size We recommend that you select the smallest size to achieve the best control properties

metric imperial

Enter densityFlow rate Qn

Inlet pressure pu

Outlet pressure pd

Product RV

5 3 1 Calculate VAG N

Pressure loss ∆p

∆pmin

Flow rate

v

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 27

6 Selection6 1 Selection table for pressure regulator with solenoid valve VAD

Accessories right Accessories left

Type1) T R N F N K P Q Y W S2) G2) R2) L2) M20

cab

le g

land

Plug

with

soc

ket

Plug

with

out s

ocke

t

-25-50 -100 A B Scre

w p

lug

Pres

sure

test

poi

nt

DG

17V

C 3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

Scre

w p

lug

Pres

sure

test

poi

nt

DG

17V

C 3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

VAD 115

VAD 120

VAD 125

VAD 240

VAD 350

= standard = available1) The following nominal inlet fl ange diameters are also available size 1 with nominal diameter DN 10 size 2 with nominal diameters DN 25 DN 32 and DN 50 size 3 with nominal diameters DN 40 and DN 652) Position indicator and bypasspilot gas valve cannot be fi tted together on the same side3) Specify the test point for inlet pressure pu or outlet pressure pdHelp for selecting the pressure regulator VAD can be found on the ProFi DVD wwwkromschroedercom Products DVD Product fi nder ldquoProFirdquo

Order exampleVAD 240RNW-100A

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 28

Selection

6 2 Type code for VADCode DescriptionVAD Pressure regulator with solenoid valve1 ndash 3 SizeT T-product10 ndash 65 Nominal inlet and outlet diameterRNF

Rp internal threadNPT internal thread

ISO fl angeN Quick opening quick closingKPQYW

Mains voltage 24 V DCMains voltage 100 V AC 5060 HzMains voltage 120 V AC 5060 HzMains voltage 200 V AC 5060 HzMains voltage 230 V AC 5060 Hz

SG

Position indicator with visual indicatorPosition indicator for 24 V with visual indicator

RL

Viewed from the right (in the direction of fl ow)Viewed from the left (in the direction of fl ow)

-25-50-100

Outlet pressure pd 25 ndash 25 mbar20 ndash 50 mbar

35 ndash 100 mbarAB

Standard valve seatReduced valve seat

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 29

Selection

6 3 Selection table for airgas ratio control with solenoid valve VAG flow rate regulators VAH VRH

Type1) T R N F N K P Q Y W S2) G2) R2) L2) M20

cab

le g

land

Plug

with

soc

ket

Plug

with

out s

ocke

t

A B E K A N Scre

w p

lug

Pres

sure

test

poi

ntD

G 1

7VC

3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

Scre

w p

lug

Pres

sure

test

poi

ntD

G 1

7VC

3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

VAG 115 VAG 120 VAG 125 VAG 240 VAG 350

VAH 115 VAH 120 VAH 125 VAH 240 VAH 350

VRH 115 VRH 120 VRH 125 VRH 240 VRH 350

= standard = available1) The following nominal inlet fl ange diameters are also available size 1 with nominal diameter DN 10 size 2 with nominal di-

ameters DN 25 DN 32 and DN 50 size 3 with nominal diameters DN 40 and DN 652) Position indicator and bypasspilot gas valve cannot be fi tted together on the same side3) Specify the test point for inlet pressure pu or outlet pressure pdHelp for selecting the regulators can be found on the ProFi DVD wwwkromschroedercom Products DVD Product fi nder ldquoProFirdquo

Order exampleVAG 240RNWAE

Accessories right Accessories left

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 30

Selection

6 4 Type code for VAG VAH VRHCode DescriptionVAGVAHVRH

Airgas ratio control with solenoid valveFlow rate regulator with solenoid valve

Flow rate regulator1 ndash 3 SizeT T-product15 ndash 50 Nominal inlet and outlet diameterRNF

Rp internal threadNPT internal thread

ISO fl angeN1) Quick opening quick closingK1)

P1)

Q1)

Y1)

W1)

Mains voltage 24 V DCMains voltage 100 V AC 5060 HzMains voltage 120 V AC 5060 HzMains voltage 200 V AC 5060 HzMains voltage 230 V AC 5060 Hz

S1)

G1)Position indicator with visual indicator

Position indicator for 24 V with visual indicatorRL

Viewed from the right (in the direction of fl ow)Viewed from the left (in the direction of fl ow)

AB

Standard valve seatReduced valve seat

EKAN

Connection kit for air control pressure psaVAG VAH VRH compression fi tting

VAG plastic hose couplingVAG VAH VRH NPT 18 adapter

VAG zero governor1) Only available for VAG VAV VAH

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 31

6 5 Selection table for variable airgas ratio control with solenoid valve VAVAccessories right Accessories left

Type1) T R N F N K P Q Y W S2) G2) R2) L2) M20

cab

le g

land

Plug

with

soc

ket

Plug

with

out s

ocke

t

A B E K A Scre

w p

lug

Pres

sure

test

poi

ntD

G 1

7VC

3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

Scre

w p

lug

Pres

sure

test

poi

ntD

G 1

7VC

3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

VAV 115

VAV 120

VAV 125

VAV 240

VAV 350

= standard = available1) The following nominal inlet fl ange diameters are also available size 1 with nominal diameter DN 10 size 2 with nominal diameters DN 25 DN 32 and DN 50 size 3 with nominal diameters DN 40 and DN 652) Position indicator and bypasspilot gas valve cannot be fi tted together on the same side3) Specify the test point for inlet pressure pu or outlet pressure pdHelp for selecting the variable airgas ratio control VAV can be found on the ProFi DVD wwwkromschroedercom

Products DVD Product fi nder ldquoProFirdquo

Order exampleVAV 240RNWAK

Selection

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 32

Selection

6 6 Type code for VAVCode DescriptionVAV Variable airgas ratio control with solenoid valve1 ndash 3 SizeT T-product15 ndash 50 Nominal inlet and outlet diameterRNF

Rp internal threadNPT internal thread

ISO fl angeN Quick opening quick closingKPQYW

Mains voltage 24 V DCMains voltage 100 V AC 5060 HzMains voltage 120 V AC 5060 HzMains voltage 200 V AC 5060 HzMains voltage 230 V AC 5060 Hz

SG

Position indicator with visual indicatorPosition indicator for 24 V with visual indicator

RL

Viewed from the right (in the direction of fl ow)Viewed from the left (in the direction of fl ow)

AB

Standard valve seatReduced valve seat

EKA

Connection kit for air control pressure psa and combus-tion chamber control pressure psc

compression fi ttingplastic hose coupling

NPT 18 adapter

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 33

Selection

6 7 AccessoriesModularly configurable withndash Screw plugsndash Pressure test pointsndash Pressure switch DGVC for inlet

andor outlet pressurendash Tightness control TCndash Bypasspilot gas valve VBY 8 for

size 1ndash Bypasspilot gas valve VAS 1For further information see page 37 (Accessories)

Position indicator

Plug with socket

Plug

Screwplugs

Pressuretest points

Pressure switch DGC Tightness

control TC

Bypasspilot gas valve VBY 8 for size 1

Bypasspilot gas valve VAS 1

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 34

7 Project planning informationDo not store or install the unit in the open airThe inlet pressure pu and the outlet pressure pd can be meas-ured on both sides of the valve body To increase the control accuracy an external impulse line can be connected instead of the pressure test point pd

VAD

pu

pd

(psa)

VAGpd

pu

psa

psa

VAD measurement point for the gas outlet pressure pd on the regulator body A combustion chamber control line (psc) can be connected to connection psa for maintaining a constant burner capacityVAG additional measurement point for the air control pressure psa on the regulator body

VAV

psapsc

pu

pd

VAH VRH

pu

pd-

pdpsa-

psa

VAV measurement point for the outlet pressure pd on the regulator bodyVAH additional measurement points for the outlet pressure pd- and the air control pressure psapsa- on the regulator body

7 1 Installation

GFK

VAGVAH

GFKVAD

Sealing material and thread cuttings must not be allowed to get into the valve housing Install a filter upstream of every system

gt20 mmgt0 79

The unit must not be in contact with masonry Minimum clear-ance 20 mm (079 inches)Ensure that there is sufficient space for installation and ad-justment

le +100 degCle +212 degF

The solenoid body heats up during operation ndash depending on ambient temperature (max 60degC140degF) and intrinsic heating (approx 40degC104degF)

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 35

In the case of double solenoid valves the position of the con-nection box can only be changed by removing the actuator and reinstalling it offset by 90deg or 180deg

If more than three valVario controls are installed in line the controls must be supported

The seals in some gas compression fittings are approved for temperatures of up to 70degC (158degF) This temperature limit will not be exceeded if the flow through the pipe is at least 1 msup3h (3531 SCFH) of gas and the maximum ambient temperature is 50degC (122degF)

7 1 1 Installation position

pu ge 80 mbar(80 hPa32 WC)

VAD VAG VAH VRH VAV

In humid environments black solenoid actuator in the vertical upright position only

VAD VAG VAH VRH black solenoid actuator in the vertical upright position or tilted up to the horizontal not upside downVAG VAH horizontal position only if pu ge 80 mbar (32 WC))VAV installation in the vertical position only black solenoid actuator in the vertical upright positionTo ensure that the airgas ratio control VAG the flow rate regulator VAH VRH or the variable airgas ratio control VAV can react quickly when the load is changed the impulse line for the air control pressure psa and for VAV the impulse line for the combustion chamber control pressure psc should be kept as short as possible The tube internal diameter for the impulse line must always be ge 39 mm (015)

VAH VRHIt is not permitted to install a gas solenoid valve VAS down-stream of flow rate regulator VAH VRH and upstream of fine-adjusting valve VMV The VAS would no longer be able to perform its function as a second safety valve if installed in the above-mentioned position

M

VMV

VAH

VASVAS

pd-

psa-psa

VMV

VAH pd-

psa-psa

The measuring orifice in the air line for impulse lines psa and psa- must always be installed downstream of the air control valve

Project planning information gt Installation

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 36

VAVThe impulse line for the combustion chamber control pres-sure psc must be fitted so that no condensation can enter the pressure regulator but rather flows back into the combustion chamber

7 2 Setting the low-fire rate on VAG VAH VRH VAV

-10 +05-05

ndash

+1

-15

mbar

+15

06

1 152

3

N V

+ +ndash

+30 -15+15

ndash

-3

+5

mbar

-5

N

+

VAG VAH VRH VAV

If the burner operates at low-fire rate the gasair mixture can be changed using the parallel shift of the characteristic curve by turning the adjusting screw ldquoNrdquoAdjusting range at low fire VAG VAH VRH -5 to +5 mbar (-195 to +195 WC) VAV -15 to +15 mbar (-06 to +06 WC)

7 3 Setting the high-fire rate on VAVTo set the high-fire rate the transmission ratio is changed us-ing the adjusting screw ldquoVrdquo until the required flue gas values are achievedTransmission ratio V = pdpsa = 061 to 31The settings N and V can influence each other and must be repeated if necessary

+N+V

-V

-N

VAV

psa [mbar]

p d [m

bar]

7 3 1 CalculationWith no connection to the combustion chamber control pres-sure psc pd = V times psa + NWith connection to the combustion chamber control pressure psc (pd - psc) = V times (psa - psc) + N

Project planning information

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 37

pu pd

21579

4836

085310

189

142

8 Accessories8 1 Gas pressure switch DG VC for VAx VRHType Adjusting range [mbar]DG 17VC 2 to 17DG 40VC 5 to 40DG 110VC 30 to 110DG 300VC 100 to 300

Scope of delivery 1 times pressure switch for gas 2 times retaining screws 2 times sealing rings

8 2 Gas pressure switch DG VCT for VAx T VRH TType Adjusting range [WC]DG 17VCT 08 to 68DG 40VCT 2 to 16DG 110VCT 12 to 44DG 300VCT 40 to 120

Scope of delivery 1 times gas pressure switch with AWG 18 connection wires 2 times retaining screws 2 times sealing ringsMonitoring the inlet pressure pu the electrical plug of the pressure switch for gas points towards the inlet flangeMonitoring the outlet pressure pd the electrical plug of the pressure switch for gas points towards the outlet flange

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 38

A BC

D

FE

ACD

F

B

E

8 3 Bypass valvepilot gas valve VAS 18 3 1 VAS 1 attached to VADVAGVAHVAV 1Scope of delivery A 1 times bypasspilot gas valve VAS 1 B 4 times O-rings C 4 times double nuts D 4 times connection parts E 1 times mounting aidBypass valve VAS 1 F 2 times connection pipes if the bypass valve has a blind flange

at the outlet sidePilot gas valve VAS 1 F 1 times connection pipe 1 times sealing plug if the pilot gas valve

has a threaded flange at the outlet side

Accessories

8 3 2 VAS 1 attached to VADVAGVAHVAV 2 VADVAGVAHVAV 3Scope of delivery A 1 times bypasspilot gas valve VAS 1 B 4 times O-rings C 4 times spacer sleeves D 4 times connection parts E 1 times mounting aidBypass valve VAS 1 F 2 times connection pipes if the bypass valve has a blind flange

at the outlet sidePilot gas valve VAS 1 F 1 times connection pipe 1 times sealing plug if the pilot gas valve

has a threaded flange at the outlet side

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 39

2

3

456

810

20

30

405060

80100

∆p [m

bar]

005 01 02 03 05 08 1 2 3 4 51

3

2

Qn [m3h]

1

01

02

03

0405

08

003

002

6 8 10

005 01 02 03 05 08 1 2 3 4 5003 6 8 10

20

005 01 02 03 05 08 1 2 3 4 5003 6 8 10 20

30

∆p [i

nch

WC]

1

2

3

456

810

20

30

40

04

004

006

00801

02

03

0506

08

Qn [SCFH]10 40 60 100 200 3001 500 10002 3 4 5

120 306 8

21 3 4 5 6 7 8 910

8 3 3 Flow rate

The characteristic flow rate curves have been measured for bypass valve VAS 1 with connection pipe diameter 1 to 10 mm (004 to 04) and for the pilot gas valve with 10 mm (04) connection pipe

Bypass valve connection pipe diameter [mm]

Pilo

t gas

val

ve 1

0 m

m (0

4)

conn

ectio

n pi

pe d

iam

eter

Accessories gt Bypass valvepilot gas valve VAS 1

= natural gas (ρ = 080 kgm3) = propane (ρ = 201 kgm3) = air (ρ = 129 kgm3)

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 40

Accessories

8 4 Bypass valvepilot gas valve VBY 8 for VADVAGVAHVAV 1

B

C

AVBY 8

VAx 1

55

(217)40(157)

70 (276)

80(315)

Rp frac14(pilot gas valve)

For mounting on VAD VAG VAH VAV 1 and double solenoid valve VCD VCG VCH VCV 1

8 4 1 Scope of delivery VBY 8I as bypass valveA 1 times bypass valve VBY 8IB 2 times retaining screws with 4 times O-rings both retaining screws

have a bypass orificeC 1 times grease for o-rings

8 4 2 Scope of delivery VBY 8R as pilot gas valveA 1 times pilot gas valve VBY 8RB 2 times retaining screws with 5 x O-rings one retaining screw

has a bypass orifice (2 x O-rings) the other does not (3 x O-rings)

C 1 times grease for O-rings

8 4 3 SelectionType I R W Q K 6L -R -L E B D 05

VBY 8

Order exampleVBY 8RW6L-LED

8 4 4 Type codeCode DescriptionVBY Gas solenoid valve8 Nominal sizeIR

For internal gas pick-up as bypass valveFor external gas pick-up as pilot gas valve

KQW

Mains voltage 24 V DC Mains voltage 120 V AC 5060 HzMains voltage 230 V AC 5060 Hz

6L Electrical connection via plug and socket with LED-R-L

Attachment side of main valve right-hand sideAttachment side of main valve left-hand side

EB

Attached to the VAxEnclosed (separate packing unit)

05D

Nozzle diameter = 05 mm (002)Flow adjustment

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 41

2

01

02

03

05

081

3

456

810

20

30

405060

80100

∆p [m

bar]

1

3

201 02 03 05 1 2 3001 003 4

Qn [m3h]

02 03 05 1 2

01 02 05

002 006

002

002 006 1

0010006 005 01

001

0003

0006 2 3

VBY 8DVBY 805

∆p [i

nch

WC]

1

2

3

456

810

20

30

40

040506

08

1

Qn [SCFH]10 40 60 1005 2081 2 30402

01

02

03

004005006

008

Adjusting range

8 4 5 Flow rateVBY 8 D

+

-

The flow rate can be set by turning the flow rate restrictor (4 mm016 Allen screw) frac14 of a turn Flow rate 10 to 100

VBY 8 05The flow is routed through a 05 mm (002) nozzle and thus has a fixed characteristic flow rate curve Adjustment is not possible

8 4 6 Technical dataInlet pressure pu max 500 mbar (7 psig)Ambient temperature 0 to +60degC (32 to 140degF) no condensation permittedStorage temperature 0 to +40degC (32 to 104degF) no condensation permittedPower consumption 24 V = 8 W 120 V = 8 W 230 V = 95 WEnclosure IP 54

Accessories gt Bypass valvepilot gas valve VBY 8 for VADVAGVAHVAV 1

= natural gas (ρ = 080 kgm3) = propane (ρ = 201 kgm3) = air (ρ = 129 kgm3)

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 42

TC 116VB C

56(22)

49(193)

27(106)

A

A

VCx 1 VCx 2VCx 3

8 5 Tightness control TC 116Vfor VAx 1 ndash 3An adapter plate is required to attach the tightness control to the right- or left-hand side of the pressure regulator with gas solenoid valveScope of delivery A 1 times adapter plate B 2 times O-rings C 2 times retaining screwsFor attachment to left-hand side Order No 74922391 right-hand side Order No 74921995

8 6 Pressure test pointsTest points to check the inlet pressure pu and outlet pressure pdScope of delivery 1 x pressure test points with 1 x profiled sealing rings Order No 74923390

8 7 Cable gland setWhen wiring a double solenoid valve with pressure regula-tor VCx the connection boxes are to be connected using a cable gland setThe cable gland set can only be used if the connection boxes are at the same height and on the same side and if both valves are equipped either with or without a proof of closure switchVA 1 Order No 74921985 VA 2 Order No 74921986 VA 3 Order No 74921987

Accessories

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 43

A B

D

C

Accessories

8 9 Differential pressure orifice

Size PipeDN

Differential pressure orifi cewith outlet dia

1 15 17 mm 0671 20 25 mm 0981 25 30 mm 1182 40 46 mm 1813 50 58 mm 228

If pressure regulator VADVAGVAV 1 is retrofitted upstream of gas solenoid valve VAS 1 a DN 25 differential pressure orifice with outlet opening d = 30 mm (118) must be inserted at the outlet of the pressure regulatorIn the case of pressure regulator VAx 115 or VAx 120 the DN 25 differential pressure orifice must be ordered separately and retrofitted Order No 74922240

8 8 Seal set VA 1 ndash 3VA 1 Order No 74921988 VA 2 Order No 74921989 VA 3 Order No 74921990Scope of deliveryA 1 times double block seal B 2 times O-rings (flange) C 2 times O-rings (pressure switch) for pressure test pointscrew plug D 2 times sealing rings (flat sealing) and 2 times profiled sealing rings

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 44

BA

C

pd-

8 11 Attachment blockFor locked installation of pressure gauge and other acces-soriesScope of delivery A 1 times attachment block B 2 times self-tapping screws for installation C 2 times O-rings

Accessories

8 10 Retaining frameIn the event that a pressure regulator VAx is installed at a later point upstream of a gas solenoid valve VAS a measur-ing orifice VMO or a fine-adjusting valve VMV the retaining frame must be fitted at the inlet of the second device in order to fasten the differential pressure orifice at the regulator outlet Order the retaining frame separatelyRetaining frame for Size 1 Order No 74923029 Size 2 Order No 74923030 Size 3 Order No 74923031

8 12 Gas control lineFine-adjusting valve VMV can be installed on the flow rate regulator VAH for fine adjustment of the gas flow rateThe gas control line for gas outlet pressure pd- is available with 2 18 compression fittingsSize 1 Order No 74924458 Size 2 Order No 74924459

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 45

8 13 Measuring orifice VMOThe measuring orifice VMO is designed to reduce the gas and air flow rates and is installed downstream of the valVario control The measuring orifice is available with Rp internal thread (NPT internal thread) or flange to ISO 7005See wwwdocuthekcom Elster Kromschroumlder Krom-schroumlder LBE Products 03 Valves and butterfly valves valVario accessories Type of document Technical Informa-tion VMO

Accessories

8 14 Filter module VMFUsing the filter module VMF the gas flow upstream of the gas solenoid valve VAS and the airgas ratio control is cleaned The filter module is available with Rp internal thread (NPT internal thread) or flange to ISO 7005 and can also be supplied with fitted pressure switch as an optionSee wwwdocuthekcom Elster Kromschroumlder Krom-schroumlder LBE Products 03 Valves and butterfly valves valVario accessories Type of document Technical Informa-tion VMF

8 15 Fine-adjusting valve VMVThe flow rate is set using the fine-adjusting valve VMV The fine-adjusting valve is available with Rp internal thread (NPT internal thread) or flange to ISO 7005See wwwdocuthekcom Elster Kromschroumlder Krom-schroumlder LBE Products 03 Valves and butterfly valves valVario accessories Type of document Technical Infor-mation VMV

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 46

9 Technical dataGas types natural gas LPG (gaseous) biologically produced methane (max 01 -by-vol H2S) or clean air other gases on request The gas must be clean and dry in all temperature conditions and must not contain condensateCE and FM approved UL listed max inlet pressure pu 10 ndash 500 mbar (4 ndash 200 WC) FM approved (230 V AC 120 V AC 24 V DC) non opera-tional pressure 700 mbar (10 psig)ANSICSA approved (230 V AC 120 V AC 24 V DC) up to 350 mbar (5 psig)Opening time of the solenoid valve quick opening le 05 s Closing time quick closing lt 1 sMedium and ambient temperatures -20 to +60degC (-4 to +140degF) no condensation permittedStorage temperature -20 to +40degC (-4 to +104degF)Enclosure IP 65Valve housing aluminium valve seal NBRConnection flanges with internal thread Rp to ISO 7-1 NPT to ANSIASMESafety valve Class A to EN 161 Factory Mutual Research Class 7400 Process Control Valves (230 V AC 120 V AC 24 V DC) ANSI Z2121 and CSA 65 ANSI Z2118 and CSA 63Control class A to EN 88-1Control range up to 101

Mains voltage 230 V AC +10-15 5060 Hz 200 V AC +10-15 5060 Hz 120 V AC +10-15 5060 Hz 100 V AC +10-15 5060 Hz 24 V DC plusmn20Duty cycle 100Power factor of the solenoid coil cos φ = 09Power consumption

Type Voltage Power

VAx 1

24 V DC 25 W ndash100 V AC 25 W (26 VA)120 V AC 25 W (26 VA)200 V AC 25 W (26 VA)230 V AC 25 W (26 VA)

VAx 2 VAx 3

24 V DC 36 W ndash100 V AC 36 W (40 VA)120 V AC 40 W (44 VA)200 V AC 40 W (44 VA)230 V AC 40 W (44 VA)

VBY24 V DC 8 W ndash

120 V AC 8 W ndash230 V AC 95 W ndash

Cable gland M20 times 15Electrical connection cable with max 25 mm2 (AWG 12) or plug with socket to EN 175301-803

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 47

Position indicator contact rating

Type Voltage Min current(resistive load)

Max current(resistive load)

VAxS VCxS 12 ndash 250 V AC 5060 Hz 100 mA 3 AVAxG VCxG 12 ndash 30 V DC 2 mA 01 A

Position indicator switching frequency max 5 times per minute

Switching current [A]

Switching cyclescos φ = 1 cos φ = 06

01 500000 50000005 300000 250000

1 200000 1000003 100000 ndash

Limited to max 200000 cycles for heating systems

9 1 VADOutlet pressure pd VAD-25 25 ndash 25 mbar (1 ndash 10 WC) VAD-50 20 ndash 50 mbar (8 ndash 20 WC) VAD-100 35 ndash 100 mbar (14 ndash 40 WC)Combustion chamber control pressure psc (connection psa)

-20 to +20 mbar (-78 to +78 WC)

VAD

pu

pd

(psa)

9 2 VAGOutlet pressure pd 05 ndash 100 mbar (02 ndash 40 WC)Air control pressure psa 05 ndash 100 mbar (02 ndash 40 WC)

Adjusting range at low fire plusmn5 mbar (plusmn2 WC)Transmission ratio of gas to air 11The inlet pressure must always be higher than the air control pressure psa + pressure loss ∆p + 5 mbar (2 WC)

VAGpd

pu

psa

psa

VAGK 1 x 18 coupling for plastic hose (internal dia 39 mm (015) external dia 61 mm (024)) or VAGE 1 x 18 compression fitting for 6 times 1 tube or VAGA 1 x NPT 18 adapter or VAGN zero governor with breathing orifice

9 3 VAH VRHAir control pressure psa 06 ndash 100 mbar (024 ndash 40 WC) Differential air pressure ∆psa (psa - psa-) 06 ndash 50 mbar (024 ndash 197 WC) Differential gas pressure ∆pd (pd - pd-) 06 ndash 50 mbar (024 ndash 197 WC)Transmission ratio of gas to air 11The inlet pressure must always be higher than the differen-tial air pressure ∆psa + pressure loss ∆p + max gas pres-sure on burner + 5 mbar (2 WC)Adjusting range at low fire plusmn5 mbar (plusmn2 WC)

Technical data

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 48

VAHVRH

pd-

pu

psa-

psa

Connection of the air control pressure psaVAHE VRHE 3 x 18 compression fitting for 6 times 1 tube or VAHA VRHA 3 x NPT 18 adapter

9 4 VAVOutlet pressure pd 05 ndash 30 mbar (02 ndash 117 WC)Air control pressure psa 04 ndash 30 mbar (015 ndash 117 WC)Combustion chamber control pressure psc

-20 to +20 mbar (-78 to +78 WC)Min control pressure differential psa - psc 04 mbar (015 WC)Min pressure differential pd - psc 05 mbar (02 WC)Adjusting range at low fire plusmn15 mbar (plusmn06 WC)Transmission ratio of gas to air 061 to 31The inlet pressure pu must always be higher than the air control pressure psa times transmission ratio V + pressure loss ∆p + 15 mbar (06 WC)

pu

pd psapsc

VAV

VAVK 2 x plastic hose couplings (internal dia 39 mm (015) external dia 61 mm (024)) or VAVE 2 x 18 compression fitting for 6 times 1 tube or VAVA 2 x NPT 18 adapter

Technical data

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 49

9 5 Safety-specific characteristic values for VAx 1 ndash 3For SILSuitable for Safety Integrity Level SIL 1 2 3

Diagnostic coverage DC 0

Type of subsystem Type A to EN 61508-2 74312

Operating mode High demand mode pursu-ant to EN 61508-4 3512

For PLSuitable for Performance Level PL a b c d e

Category B 1 2 3 4Common cause failure CCF gt 65Application of essential safety requirements Satisfied

Application of tried-and-tested safety requirements Satisfied

For SIL and PL

B10d value

Operating cyclesVAD VAG VAV VAH 1 10094360VAD VAG VAV VAH 2 8229021VAD VAG VAV VAH 3 6363683

Hardware fault tolerance (1 valve) HFT 0

Hardware fault tolerance (2 valves) HFT 1

Safe failure fraction SFF gt 90Fraction of undetected com-mon cause failures β ge 2

Max service life under operating conditions10 years after date of production plus max 12 year in stor-age prior to first use or once the given number of operating cycles has been reached depending on which is achieved firstThe devices are suitable for single-channel systems (HFT = 0) up to SIL 2PL d and up to SIL 3PL e when two re-dundant valves are installed in a double-channel architecture (HFT = 1) provided that the complete system complies with the requirements of EN 61508ISO 13849

For a glossary of terms see page 53 (Glossary)

Technical data

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 50

nop 1hnop 1a

sB10d

T10d aPFHD (1 VAx) 1h

PFHD (2 VAx) 1h

PFDavg (1 VAx)

PFDavg (2 VAx)

Technical data gt Safety-specific characteristic values for VAx 1 ndash 3

9 5 1 Determining the PFHD value the λD value and the MTTFd value

PFHD = λD = x nop= 1MTTFd

01B10d

PFDavg = x λD x 24 x 365 x T10d 12

Type

Cycle time

suitable for

suitable for

PFHD = Probability of dangerous failure (HDM = high de-mand mode) [1hour]PFDavg = Average probability of dangerous failure on de-mand (LDM = low demand mode)λD = Mean dangerous failure rate [1hour]MTTFd = Mean time to dangerous failure [hours]nop = Demand rate (mean number of annual operations) [1hour]

9 5 2 Calculating the PFHD and PFDavg

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 51

VAD VAG VAH VAV

H1

Rp frac14(NPT frac14)

H2

E

LF

F

H4

H3

B

VAxS VAxF

L2G

G

Technical data

9 6 Dimensions

Type

Connec-tion Dimensions

WeightRpNPT DN

L L2 E F G H1 H2 H3 H4 Bmm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch kg lbs

VAx 115 12 15 75 29 ndash ndash 75 29 15 06 ndash ndash 143 56 82 32 161 63 117 46 97 38 18 40VAH 115 12 15 75 29 ndash ndash 75 29 15 06 ndash ndash 143 56 100 39 161 63 135 53 97 38 2 44VAx 120 34 20 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 82 33 161 63 117 46 97 38 19 42VAH 120 34 20 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 100 39 161 63 135 53 97 38 21 46VAx 125 1 25 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 82 33 161 63 117 46 97 38 19 42VAH 125 1 25 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 100 39 161 63 135 53 97 38 21 46VAx 240 112 40 128 50 200 79 85 33 29 11 66 26 170 67 112 44 191 75 162 64 125 49 44 97VAH 240 112 40 128 50 200 79 85 33 29 11 66 26 170 67 132 52 191 75 182 72 125 49 47 104VAx 350 2 50 155 61 230 91 85 33 36 14 74 29 180 70 135 53 201 79 196 77 160 63 61 134VAH 350 2 50 155 61 230 91 85 33 36 14 74 29 180 70 156 61 201 79 217 85 160 63 64 141

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 52

10 Converting unitssee wwwadlatusorg

11 Maintenance cyclesAt least once per annum at least twice per annum for biologi-cally produced methaneIf the flow rate drops clean the strainer

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 53

12 Glossary12 1 Diagnostic coverage DCMeasure of the effectiveness of diagnostics which may be determined as the ratio between the failure rate of detected dangerous failures and the failure rate of total dangerous failuresNOTE Diagnostic coverage can exist for the whole or parts of a safety-related system For example diagnostic cover-age could exist for sensors andor logic system andor final elements Unit see EN ISO 13849-12008

12 2 Mode of operationHigh demand mode or continuous modeOperating mode where the frequency of demands for opera-tion made on a safety-related system is greater than one per year or greater than twice the proof-test frequencysee EN 61508-42008

12 3 CategoryClassification of the safety-related parts of a control system in respect of their resistance to faults and their subsequent behaviour in the fault condition and which is achieved by the structural arrangement of the parts fault detection andor by their reliability see EN ISO 13849-12008

12 4 Common cause failure CCFFailures of different items resulting from a single event where these failures are not consequences of each othersee EN ISO 13849-12008

12 5 Fraction of undetected common cause failures β Fraction of undetected failures of redundant components due to a single event whereby these failures are not based on mutual causesNOTE β is expressed as a fraction in the equations and as a percentage elsewheresee EN 61508-62010

12 6 B10d valueMean number of cycles until 10 of the components fail dan-gerouslysee EN ISO 13849-12008

12 7 T10d valueMean time until 10 of the components fail dangerouslysee EN ISO 13849-12008

12 8 Hardware fault tolerance HFTA hardware fault tolerance of N means that N + 1 is the mini-mum number of faults that could cause a loss of the safety functionsee IEC 61508-22010

12 9 Mean dangerous failure rate λD Mean rate of dangerous failures during operation time (T10d) Unit 1hsee EN ISO 13849-12008

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 54

12 10 Safe failure fraction SFFFraction of safe failures related to all failures which are as-sumed to appearsee EN 13611A22011

12 11 Probability of dangerous failure PFHD Value describing the likelihood of dangerous failure per hour of a component for high demand mode or continuous mode Unit 1hsee EN 13611A22011

12 12 Mean time to dangerous failure MTTFd Expectation of the mean time to dangerous failuresee EN ISO 13849-12008

12 13 Demand rate nop Mean number of annual operationssee EN ISO 13849-12008

12 14 Average probability of dangerous failure on demand PFDavg (LDM = 1 ndash 10 switching cyclesyear)Average probability of a dangerous failure of the safety function on demand (LDM = low demand mode)see EN 61508-6

Glossary

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415

Finally we are offering you the opportunity to assess this ldquoTechnical Information (TI)rdquo and to give us your opinion so that we can improve our documents further and suit them to your needs

ClarityFound information quicklySearched for a long timeDidnrsquot find informationWhat is missing

ComprehensionCoherentToo complicatedNo answer

ScopeToo littleSufficientToo wideNo answer

No answer

NavigationI can find my way aroundI got ldquolostrdquoNo answer

UseTo get to know the productTo choose a productPlanningTo look for information

My scope of functionsTechnical departmentSalesNo answer

Remarks

(Adobe Reader 7 or higher required) wwwadobecom

Elster GmbH Postfach 2809 middot 49018 Osnabruumlck Strotheweg 1 middot 49504 Lotte (Buumlren) GermanyT +49 541 1214-0 F +49 541 1214-370 infokromschroedercomwwwkromschroedercom

The current addresses of our international agents are available on the Internetwwwkromschroederdeindexphpid=718ampL=1

We reserve the right to make technical modifications in the interests of progressCopyright copy 2015 Elster GmbH All rights reserved

Contact

Feedback

0325

0530

  • Pressure regulators with solenoid valve VAD VAG VAV VAH
  • Flow rate regulator VRH
  • Pressure regulators with double solenoid valve VCD VCG VCV VCH
  • Contents
  • 1 Application
    • 11 Examples of application
      • 111 Constant pressure control
      • 112 Constant pressure control with two gas solenoid valves
      • 113 Constant pressure control with max pressure switch
      • 114 Constant pressure control with non-controlled pilot gas outlet
      • 115 Modulating control
      • 116 Modulating control with two gas solenoid valves
      • 117 Modulating control with two gas solenoid valves and inlet pressure switch
      • 118 HighLow control
      • 119 Zero pressure control
      • 1110 Staged flow rate control
      • 1111 Continuous or staged flow rate control
      • 1112 Modulating control with variable airgas ratio control with gas solenoid valve
      • 1113 Modulating control in residential heat generation
          • 2 Certification
          • 3 Function
            • 31 VAD VAG VAH VRH VAV
              • 311 Pressure regulator for gas VAD
              • 312 Airgas ratio control VAG
              • 313 Flow rate regulators VAH VRH
              • 314 Variable airgas ratio control VAV
              • 315 Pressure regulator with gas solenoid valve VAxS position indicator with visual indicator
                • 32 Animation
                • 33 Connection diagram
                  • 331 VAx with M20 cable gland
                  • 332 VAx with plug
                  • 333 VAS with VADVAGVAHVAV with M20 cable gland
                  • 334 VAS with VADVAGVAHVAV with plug
                      • 4 Replacement possibilities for MODULINE pressure regulators with gas solenoid valve
                        • 41 GVS GVI GVIB GVR and GVRH are to be replaced by VAD VAG VAG+VAS VAH and VAV
                          • 5 Flow rate
                            • 51 Selection example for VAD
                              • 511 Calculate VAD
                                • 52 Selection example for VAG VAH VRH VAV
                                  • 521 CalculateVAG VxHVAV
                                    • 53 Selection example for zero governor VAGN
                                      • 531 Calculate VAGN
                                          • 6 Selection
                                            • 61 Selection table for pressure regulator with solenoid valve VAD
                                            • 62 Type code for VAD
                                            • 63 Selection table for airgas ratio control with solenoid valve VAG flow rate regulators VAH VRH
                                            • 64 Type code for VAG VAH VRH
                                            • 65 Selection table for variable airgas ratio control with solenoid valve VAV
                                            • 66 Type code for VAV
                                            • 67 Accessories
                                              • 7 Project planning information
                                                • 71 Installation
                                                  • 711 Installation position
                                                    • 72 Setting the low-fire rate on VAG VAH VRH VAV
                                                    • 73 Setting the high-fire rate on VAV
                                                      • 731 Calculation
                                                          • 8 Accessories
                                                            • 81 Gas pressure switch DGVC for VAx VRH
                                                            • 82 Gas pressure switch DGVCT for VAxT VRHT
                                                            • 83 Bypass valvepilot gas valve VAS 1
                                                              • 831 VAS 1 attached to VADVAGVAHVAV 1
                                                              • 832 VAS 1 attached to VADVAGVAHVAV 2 VADVAGVAHVAV 3
                                                              • 833 Flow rate
                                                                • 84 Bypass valvepilot gas valve VBY 8 for VADVAGVAHVAV 1
                                                                  • 841 Scope of delivery VBY 8I as bypass valve
                                                                  • 842 Scope of delivery VBY 8R as pilot gas valve
                                                                  • 843 Selection
                                                                  • 844 Type code
                                                                  • 845 Flow rate
                                                                  • 846 Technical data
                                                                    • 85 Tightness control TC 116V
                                                                    • 86 Pressure test points
                                                                    • 87 Cable gland set
                                                                    • 88 Seal set VA 1thinspndashthinsp3
                                                                    • 89 Differential pressure orifice
                                                                    • 810 Retaining frame
                                                                    • 811 Attachment block
                                                                    • 812 Gas control line
                                                                    • 813 Measuring orifice VMO
                                                                    • 814 Filter module VMF
                                                                    • 815 Fine-adjusting valve VMV
                                                                      • 9 Technical data
                                                                        • 91 VAD
                                                                        • 92 VAG
                                                                        • 93 VAH VRH
                                                                        • 94 VAV
                                                                        • 95 Safety-specific characteristic values for VAx 1thinspndashthinsp3
                                                                          • 951 Determining the PFHD value the λD value and the MTTFd value
                                                                          • 952 Calculating the PFHD and PFDavg
                                                                            • 96 Dimensions
                                                                              • 10 Converting units
                                                                              • 11 Maintenance cycles
                                                                              • 12 Glossary
                                                                                • 121 Diagnostic coverage DC
                                                                                • 122 Mode of operation
                                                                                • 123 Category
                                                                                • 124 Common cause failure CCF
                                                                                • 125 Fraction of undetected common cause failures β
                                                                                • 126 B10d value
                                                                                • 127 T10d value
                                                                                • 128 Hardware fault tolerance HFT
                                                                                • 129 Mean dangerous failure rate λD
                                                                                • 1210 Safe failure fraction SFF
                                                                                • 1211 Probability of dangerous failure PFHD
                                                                                • 1212 Mean time to dangerous failure MTTFd
                                                                                • 1213 Demand rate nop
                                                                                • 1214 Average probability of dangerous failure on demand PFDavg
                                                                                  • Feedback
                                                                                  • Contact
                                                                                      1. naechste_Seite 24
                                                                                      2. naechste Seite 18
                                                                                      3. naechste Seite 6
                                                                                      4. naechste Seite 16
                                                                                      5. naechste Seite 14
                                                                                      6. naechste Seite 25
                                                                                      7. naechste_Seite 11
                                                                                      8. naechste_Seite 17
                                                                                      9. fbArbeitspunkt_Min Ja
                                                                                      10. fbArbeitspunkt Ja
                                                                                      11. ftProgramm Standard-Programm
                                                                                      12. fz_kv
                                                                                      13. fz_pe 80
                                                                                      14. fz_pG 60
                                                                                      15. fzDelta_p_Soll 20
                                                                                      16. ftEinheit_Druck mbar
                                                                                      17. fatTyp [115]
                                                                                      18. fbArbeitspunkt_Min_2 Ja
                                                                                      19. fbArbeitspunkt_2 Ja
                                                                                      20. ftRegler_Typ VAG
                                                                                      21. ftProgramm_2 Standard-Programm
                                                                                      22. fz_kv_2
                                                                                      23. fatMedium [08]
                                                                                      24. fzDichte 08
                                                                                      25. ftEinheit_Dichte kgm3
                                                                                      26. fzV_Norm 30
                                                                                      27. ftEinheit_Volstrom m3h
                                                                                      28. fz_pe_2 80
                                                                                      29. fz_pG_2 60
                                                                                      30. fzDelta_p_Soll_2 20
                                                                                      31. ftEinheit_Druck2 [mbar]
                                                                                      32. ftEinheit_Geschw [ms]
                                                                                      33. fatTyp_2 [10954451150103322]
                                                                                      34. fbArbeitspunkt_Min_3 Ja
                                                                                      35. fbArbeitspunkt_3 Ja
                                                                                      36. ftProgramm_3 Standard-Programm
                                                                                      37. fz_kv_3
                                                                                      38. fz_pe_3 20
                                                                                      39. fz_pG_3 0
                                                                                      40. fzDelta_p_Soll_3 20
                                                                                      41. fatTyp_3 [123]
                                                                                      42. fatSchaltleistung [6363683]
                                                                                      43. fz_nop_Stunde 1
                                                                                      44. fz_nop_Jahr 8760
                                                                                      45. fzZyklus 3600
                                                                                      46. fzB10d 6363683
                                                                                      47. fzT10d 10
                                                                                      48. fzPFHd_1V 15714170551864384e-8
                                                                                      49. fzPFDavg_1V
                                                                                      50. ftGeeignet_1V PL d SIL 2
                                                                                      51. fzPFHd_2V 33505832253532625e-10
                                                                                      52. fzPFDavg_2V
                                                                                      53. ftGeeignet_2V PL e SIL 3
                                                                                      54. ftUebersicht Off
                                                                                      55. ftVerstaendlichkeit Off
                                                                                      56. ftFehlende_Info
                                                                                      57. ftUmfang Off
                                                                                      58. ftVerwendung_1 Off
                                                                                      59. ftVerwendung_2 Off
                                                                                      60. ftVerwendung_3 Off
                                                                                      61. ftVerwendung_4 Off
                                                                                      62. ftNavigation Off
                                                                                      63. ftTaetigkeitsbereich Off
                                                                                      64. ftBemerkung
                                                                                      65. Michael Rehkamp Elster Kromschroumlder>btnSenden
Page 14: VAD, VAG, VAV, VAH, VRH, VCD, VCG, VCV, VCH · PDF fileVAD, VAG, VAH, VAV, VRH, VCD, VCG, VCV, VCH · Edition 04.15 6 VAD VAD VAS 1 .1 Examples of application 1 .1 .1 Constant pressure

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 14

2 CertificationCertificates ndash see Docuthek

VAD VAG VAV VAH certified to SIL and PL

For systems up to SIL 3 pursuant to EN 61508 and PL e pursu-ant to ISO 13849

VAD VAG VAV VAHEU certified pursuant to

ndash Gas Appliances Directive (2009142EC) in conjunction with EN 13611 EN 161 EN 88-1 EN 126 and EN 1854

Meets the requirements of thendash Low Voltage Directive (200695EC)ndash EMC Directive (2004108EC)

VAD VAG VAV VAH FM approved

Factory Mutual Research Class 7400 Process Control Valves Designed for applications pursuant to NFPA 85 and NFPA 86 www approvalguide com

VAD VAG ANSICSA approved

American National Standards InstituteCanadian Standards Association ndash ANSI Z21 21CSA 6 5 ANSI Z21 18 and CSA 6 3

wwwcsagrouporg ndash Class number 3371-83 (natural gas LPG) 3371-03 (natural gas propane)

VAD VAG VAV UL listed

Underwriters Laboratories ndash UL 429 ldquoElectrically operated valvesrdquo wwwulcom Tools (at the bottom of the page) Online Certifications Directory

VAD VAG VAV AGA approved

AGA

Australian Gas Association Approval No 5319 httpwww aga asn auproduct_directory

Eurasian Customs Union

The product VAD VAG VAV VAH VCD VCG VCV VCH meets the technical specifications of the Eurasian Customs Union (the Russian Federation Belarus Kazakhstan)

Approval does not apply for 100 V AC and 200 V AC

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 15

3 Function3 1 VAD VAG VAH VRH VAVThe regulator is closed when it is disconnected from the power supplyOpening connect the system to the electrical power supply (alternating voltage will be rectified) The blue LED lights up The coilrsquos magnetic field pulls the armature upwards and clears the supply nozzle for the gas inlet pressure pu The gas passes through the internal impulse tube to the adjustment diaphragm and then pushes the valve disc open The outlet pressure is applied to the servo diaphragm via the internal feedback

The servo regulator then maintains a set constant outlet pres-sure pd

3 1 1 Pressure regulator for gas VADThe nominal outlet pressure pd is defined by the control spring

Servoregulator

Valve

Armature

Valve disc

Adjustmentdiaphragm

Servodiaphragm

Internalfeedback

Controlspring

Solenoid coil

Supplynozzle

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 16

3 1 2 Airgas ratio control VAGThe airgas ratio control VAG controls the outlet pressure pd depending on the variable air control pressure psaThe ratio of gas pressure to air pressure remains constant 11 The VAG is suitable for a control range up to 101If the burner operates at low-fire rate the gasair mixture can be changed by adjusting the zero point spring ldquoNrdquo

Function

psa

pd

Zero point setting N zero point spring

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 17

Function

3 1 3 Flow rate regulators VAH VRHThe flow rate regulators VAH VRH control the gas flow rate depending on the variable air flow rate The ratio of gas flow rate to air flow rate remains constant If the burner operates at low-fire rate the gasair mixture can be changed by adjusting the zero point spring ldquoNrdquoIn addition flow rate regulator VAH is designed as a gas solenoid valve and shuts off the gas or air supply safely

psa

psa-

pd-

pdInternal feedback

Zero point setting N zero point spring

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 18

3 1 4 Variable airgas ratio control VAVThe servo regulator maintains a set constant outlet pressure pd The variable airgas ratio control VAV controls the outlet pressure pd depending on the variable air control pressure psa The ratio of gas pressure to air pressure remains constantThe settings N and V can be changed and read off from both sides of the unit using the adjusting screwsThe ratio of gas pressure to air pressure at low-fire rate can be changed by adjusting the zero point setting N By turning the adjusting screw ldquoNrdquo the force of the zero point spring and thus the zero point is changed by plusmn 15 mbar (06 WC) see page 34 (Project planning information)The high-fire rate is set by turning the adjusting screw ldquoVrdquo until the required flue gas values are achieved see page 34 (Project planning information) The ratio of gas pressure to air pressure can be set from 061 to 31The settings N and V influence each other and the adjustment process must be repeated if necessaryThe outlet pressure pd is applied to the servo diaphragm via the internal feedback The combustion chamber control pres-sure psc is transmitted to the space under the air and servo diaphragms via an impulse lineThe pressure differential psa - psc is achieved on the air diaphragm and the pressure differential pd - psc on the servo diaphragm This ensures that pressure fluctuations in the combustion cham-ber can be compensated The flue gas values remain constant in the case of fluctuations in the combustion chamber pressure (pd - psc) = (psa - psc) times V + N

Function

pdpsc

psa

Air diaphragm

Transmission ratio V

Zero point setting N zero point spring

Internalfeedback

Adjustment diaphragm

Servo diaphragm

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 19

1 COM

2 NO

3 NC

3 1 5 Pressure regulator with gas solenoid valve VAx S position indicator with visual indicatorOpening when the pressure regulator is opened the posi-tion indicator switches The visual indicator is activated The ldquoopenrdquo signal is marked in red The double valve seat opens to release the volume of gasClosing the pressure regulator VAx is disconnected from the voltage supply and the closing spring presses the double valve disc on to the valve seat The position indicator is actuated The visual indicator is white for ldquoclosedrdquoThe actuator cannot be rotated on a pressure regulator with a position indicator and a visual indicatorNOTE NFPA 86 ndash the following must be taken into account as soon as the capacity of the pilot or main burner exceeds 117 kW (400000 BTUh) safety shut-off valve VASS must be fitted with a proof of closure overtravel switch with a visual position indicator and the burner-side pressure regulator with gas solenoid valve VAxS must also be fitted with a position indicator with visual indicator The closed position can be verified using the proof of closure switch of the gas solenoid valve VASS

Function

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 20

3 2 AnimationThe interactive animation shows the function of the valVario controls VADVAGVAHVAVClick on the picture The animation can be controlled using the control bar at the bottom of the window (as on a DVD player) To play the animation you will need Adobe Reader 7 or a newer version If you do not have Adobe Reader on your system you can download it from the Internet

Go to wwwadobecom click on ldquoAdobe Readerrdquo at the bottom of the page and follow the instructionsIf the animation does not start to play you can download it from the document library (wwwdocuthekcom) as an inde-pendent application

Function

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 21

3 3 Connection diagramWiring to EN 60204-1Connection diagram for VAxS with position indicator ndash see page 19 (Pressure regulator with gas solenoid valve VAxS position indicator with visual indicator)

3 3 1 VAx with M20 cable gland

L1 (+)

N (ndash)

3 3 2 VAx with plug

1 = N (-)

2 = L1 (+)

3 3 3 VAS with VADVAGVAHVAV with M20 cable glandL1V1 (+)

N (-)

L1V2 (+)

3 3 4 VAS with VADVAGVAHVAV with plug2 = L1V1 (+)

1 = N (-)

3 = L1V2 (+)

Function

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 22

4 Replacement possibilities for MODULINE pressure regulators with gas solenoid valve4 1 GVS GVI GVIB GVR and GVRH are to be replaced by VAD VAG VAG+VAS VAH and VAV

Type TypeGVS Pressure regulator with gas solenoid valve Pressure regulator with gas solenoid valve VADGVI Airgas ratio control with gas solenoid valve Airgas ratio control with gas solenoid valve VAG

GVIB Airgas ratio control with gas solenoid valve and bypass valve

Airgas ratio control with gas solenoid valve and bypass valve VAG+VAS

GVRH Flow rate regulator with gas solenoid valve Flow rate regulator with gas solenoid valve VAHGVR Variable airgas ratio control with gas solenoid valve Variable airgas ratio control with solenoid valve VAV115125 Flange 38 Size 115

Size 125 on request

115125 Flange frac12 Size 115

Size 125 Size 1 DN 15 115

115125 Flange frac34 Size 115

Size 125 Size 1 DN 20 120

115125 Flange 1 Size 115

Size 125 Size 1 DN 25 125

232240 Flange 1 Size 232

Size 240 on request

232240 Flange 1frac12 Size 232

Size 240 Size 2 DN 40 240

350 Flange 1frac12 Size 350 on request350 Flange 2 Size 350 Size 3 DN 50 350ML MODULINE + Rp internal thread connection fl anges Rp internal thread RTML MODULINE + NPT internal thread connection fl anges NPT internal thread N01 pu max 100 mbar (15 psig) pu max 500 mbar (7 psig) 02 200 mbar (3 psig) 500 mbar (7 psig)

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 23

Replacement possibilities for MODULINE pressure regulators with gas solenoid valve gt GVS GVI GVIB GVR and GVRH are to be replaced by VAD VAG VAG+VAS VAH and VAV

ContinuationType Type

Quick opening Quick opening NF1 Control ratio 11 Control ratio 11 K Mains voltage 24 V DC Mains voltage 24 V DC K

ndash 100 V AC PQ 120 V AC 120 V AC Q

ndash 200 V AC YT 220240 V AC 230 V AC W3 Electrical connection via terminals Electrical connection via terminals 6 Electrical connection via socket Electrical connection via socket 9 Metal terminal connection box Electrical connection via terminals S Position indicator Position indicator with visual indicator SG Position indicator for 24 V Position indicator for 24 V with visual indicator GM Suitable for biologically produced methane Suitable for biologically produced methane

Pressure test point at the inlet Pressure test point at the inlet and outlet Outlet pressure pd -25

Outlet pressure pd 25 ndash 25 mbar (1 ndash 10 WC)

2 ndash 90 mbar (08 ndash 36 WC) 20 ndash 50 mbar (8 ndash 20 WC) -5035 ndash 100 mbar (14 ndash 40 WC) -100Standard seat A

ExampleGVS 350ML01T3with Rp 2 connection flanges

ExampleVAD 350RNW-100A

with test points

= standard = available Pressure test points may be attached at the left- andor right-hand side Position indicator with visual indicator can be attached at the left- or right-hand side

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 24

∆p [i

nch

WC]

Qn [SCFH]100 400 600 4000 60001000 200020 30 40 50 200 3006015 80

1

08

1

2

3

4

56

8

10

20

30

40

5060

80

100

200

∆p [m

bar]

5

8

3

20

10

30

40

80

60

300

400

50

04 06 1 2 3 4 5 808 10 20 30 402

03 60 100 200

100

200

500

1

3

2

04 06 08 1 2 3 4 5 6 8 10 20 30 40

04 06 08 1 2 3 4 5 6 8 10

200

80 10020 3003

03Qn [m3h]

02

50 60 80 100

40 50 60

VAD

115

B

VAD

120

AVA

D 12

5A

P1P2

VAD

240

AVA

D 35

0A

= natural gas (ρ = 080 kgm3) = propane (ρ = 201 kgm3) = air (ρ = 129 kgm3)

The characteristic flow rate curves have been meas-ured with the specified flanges and a fitted strainer If two or more valves are combined the pressure loss of each additional valve drops by approx 5

metric imperial

Enter densityFlow rate Qn

Inlet pressure pu

Outlet pressure pd

Product RV v

Pressure loss ∆p

∆pmin

5 Flow rate5 1 Selection example for VADNatural gas Flow rate Qmax = 30 m3h Inlet pressure pu = 80 mbar Outlet pressure pd = 60 mbarThe desired control ratio from high-fire to low-fire rate is RV = 101High fire ∆p = pu - pd = 20 mbar Point P1Low fire Point P2 Qmin = 26 m3h at ∆p = 20 mbar RV = Qmax Qmin = 1151

Point P1 and point P2 must be within the working range of a unit size We recommend that you select the smallest size to achieve the best control properties

5 1 1 Calculate VAD

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 25

∆p [i

nch

WC]

Qn [SCFH]100 400 600 4000 60001000 200020 30 40 50 200 3006015 80

1

08

1

2

3

4

56

8

10

20

30

40

5060

80

100

200

∆p [m

bar]

5

8

3

20

10

30

40

80

60

300

400

50

04 06 1 2 3 4 5 808 10 20 30 402

03 60 100 200

100

200

500

1

3

2

04 06 08 1 2 3 4 5 6 8 10 20 30 40

04 06 08 1 2 3 4 5 6 8 10

200

80 10020 3003

03Qn [m3h]

02

50 60 80 100

40 50 60

= pd min lt 5 mbar

VAG

VxH

VAV

115

BVA

GV

xHV

AV 12

0A

VAG

VxH

VAV

125

A

P1

P2

VAG

VxH

VAV

240

AVA

GV

xHV

AV 3

50A

= natural gas (ρ = 080 kgm3) = propane (ρ = 201 kgm3) = air (ρ = 129 kgm3)

The characteristic flow rate curves have been meas-ured with the specified flanges and a fitted strainer If two or more valves are combined the pressure loss of each additional valve drops by approx 5

5 2 Selection example for VAG VAH VRH VAV Natural gas Flow rate Qmax = 30 m3h Inlet pressure pu = 80 mbar Outlet pressure pd max VAG = 60 mbarThe desired control ratio from high-fire to low-fire rate is RV = 101High fire ∆p = pu - pd max = 20 mbar Point P1Low fire pd min = pd max RV2 = 06 mbar Qmin = Qmax RV = 3 m3h ∆p = pu - pd min = 794 mbar Point P2 select VAG 120APoint P1 and point P2 must be within the working range of a unit size We recommend that you select the smallest size to achieve the best control properties

metric imperial

Enter densityFlow rate Qn

Inlet pressure pu

Outlet pressure pd

Product RV v

5 2 1 Calculate VAG VxH VAV

Pressure loss ∆p

∆pmin

Flow rate

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 26

∆p [i

nch

WC]

Qn [SCFH]100 400 600 4000 60001000 200020 30 40 50 200 3006015 80

1

08

1

2

3

4

56

8

10

20

30

40

5060

80

100

200

∆p [m

bar]

5

8

3

20

10

30

40

80

60

300

400

50

04 06 2 3 4 5 808 10 20 30 402

03 60 100 200

100

200

500

1

3

2

04 06 08 1 2 3 4 5 6 8 10 20 30 40

04 06 08 1 2 3 4 5 6 8 10

200

80 10020 3003

03Qn [m3h]

02

50 60 80 100

40 50 60

VAG

115

N

P1VAG

125

N

VAG

120

N

VAG

240

NP2

VAG

350

N

= natural gas (ρ = 080 kgm3) = propane (ρ = 201 kgm3) = air (ρ = 129 kgm3)

The characteristic flow rate curves have been meas-ured with the specified flanges and a fitted strainer If two or more valves are combined the pressure loss of each additional valve drops by approx 5

5 3 Selection example for zero governor VAG NNatural gas Flow rate Qmax = 30 m3h Inlet pressure pu = 20 mbar Outlet pressure pd = 0 mbar (atmospheric pressure)The desired control ratio from high-fire to low-fire rate is RV = 101High fire ∆p = pu - pd max = 20 mbar Point P1Low fire Point P2 Qmin = 24 m3h at ∆p = 20 mbar RV = Qmax Qmin = 1231Point P1 and point P2 must be within the working range of a unit size We recommend that you select the smallest size to achieve the best control properties

metric imperial

Enter densityFlow rate Qn

Inlet pressure pu

Outlet pressure pd

Product RV

5 3 1 Calculate VAG N

Pressure loss ∆p

∆pmin

Flow rate

v

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 27

6 Selection6 1 Selection table for pressure regulator with solenoid valve VAD

Accessories right Accessories left

Type1) T R N F N K P Q Y W S2) G2) R2) L2) M20

cab

le g

land

Plug

with

soc

ket

Plug

with

out s

ocke

t

-25-50 -100 A B Scre

w p

lug

Pres

sure

test

poi

nt

DG

17V

C 3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

Scre

w p

lug

Pres

sure

test

poi

nt

DG

17V

C 3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

VAD 115

VAD 120

VAD 125

VAD 240

VAD 350

= standard = available1) The following nominal inlet fl ange diameters are also available size 1 with nominal diameter DN 10 size 2 with nominal diameters DN 25 DN 32 and DN 50 size 3 with nominal diameters DN 40 and DN 652) Position indicator and bypasspilot gas valve cannot be fi tted together on the same side3) Specify the test point for inlet pressure pu or outlet pressure pdHelp for selecting the pressure regulator VAD can be found on the ProFi DVD wwwkromschroedercom Products DVD Product fi nder ldquoProFirdquo

Order exampleVAD 240RNW-100A

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 28

Selection

6 2 Type code for VADCode DescriptionVAD Pressure regulator with solenoid valve1 ndash 3 SizeT T-product10 ndash 65 Nominal inlet and outlet diameterRNF

Rp internal threadNPT internal thread

ISO fl angeN Quick opening quick closingKPQYW

Mains voltage 24 V DCMains voltage 100 V AC 5060 HzMains voltage 120 V AC 5060 HzMains voltage 200 V AC 5060 HzMains voltage 230 V AC 5060 Hz

SG

Position indicator with visual indicatorPosition indicator for 24 V with visual indicator

RL

Viewed from the right (in the direction of fl ow)Viewed from the left (in the direction of fl ow)

-25-50-100

Outlet pressure pd 25 ndash 25 mbar20 ndash 50 mbar

35 ndash 100 mbarAB

Standard valve seatReduced valve seat

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 29

Selection

6 3 Selection table for airgas ratio control with solenoid valve VAG flow rate regulators VAH VRH

Type1) T R N F N K P Q Y W S2) G2) R2) L2) M20

cab

le g

land

Plug

with

soc

ket

Plug

with

out s

ocke

t

A B E K A N Scre

w p

lug

Pres

sure

test

poi

ntD

G 1

7VC

3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

Scre

w p

lug

Pres

sure

test

poi

ntD

G 1

7VC

3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

VAG 115 VAG 120 VAG 125 VAG 240 VAG 350

VAH 115 VAH 120 VAH 125 VAH 240 VAH 350

VRH 115 VRH 120 VRH 125 VRH 240 VRH 350

= standard = available1) The following nominal inlet fl ange diameters are also available size 1 with nominal diameter DN 10 size 2 with nominal di-

ameters DN 25 DN 32 and DN 50 size 3 with nominal diameters DN 40 and DN 652) Position indicator and bypasspilot gas valve cannot be fi tted together on the same side3) Specify the test point for inlet pressure pu or outlet pressure pdHelp for selecting the regulators can be found on the ProFi DVD wwwkromschroedercom Products DVD Product fi nder ldquoProFirdquo

Order exampleVAG 240RNWAE

Accessories right Accessories left

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 30

Selection

6 4 Type code for VAG VAH VRHCode DescriptionVAGVAHVRH

Airgas ratio control with solenoid valveFlow rate regulator with solenoid valve

Flow rate regulator1 ndash 3 SizeT T-product15 ndash 50 Nominal inlet and outlet diameterRNF

Rp internal threadNPT internal thread

ISO fl angeN1) Quick opening quick closingK1)

P1)

Q1)

Y1)

W1)

Mains voltage 24 V DCMains voltage 100 V AC 5060 HzMains voltage 120 V AC 5060 HzMains voltage 200 V AC 5060 HzMains voltage 230 V AC 5060 Hz

S1)

G1)Position indicator with visual indicator

Position indicator for 24 V with visual indicatorRL

Viewed from the right (in the direction of fl ow)Viewed from the left (in the direction of fl ow)

AB

Standard valve seatReduced valve seat

EKAN

Connection kit for air control pressure psaVAG VAH VRH compression fi tting

VAG plastic hose couplingVAG VAH VRH NPT 18 adapter

VAG zero governor1) Only available for VAG VAV VAH

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 31

6 5 Selection table for variable airgas ratio control with solenoid valve VAVAccessories right Accessories left

Type1) T R N F N K P Q Y W S2) G2) R2) L2) M20

cab

le g

land

Plug

with

soc

ket

Plug

with

out s

ocke

t

A B E K A Scre

w p

lug

Pres

sure

test

poi

ntD

G 1

7VC

3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

Scre

w p

lug

Pres

sure

test

poi

ntD

G 1

7VC

3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

VAV 115

VAV 120

VAV 125

VAV 240

VAV 350

= standard = available1) The following nominal inlet fl ange diameters are also available size 1 with nominal diameter DN 10 size 2 with nominal diameters DN 25 DN 32 and DN 50 size 3 with nominal diameters DN 40 and DN 652) Position indicator and bypasspilot gas valve cannot be fi tted together on the same side3) Specify the test point for inlet pressure pu or outlet pressure pdHelp for selecting the variable airgas ratio control VAV can be found on the ProFi DVD wwwkromschroedercom

Products DVD Product fi nder ldquoProFirdquo

Order exampleVAV 240RNWAK

Selection

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 32

Selection

6 6 Type code for VAVCode DescriptionVAV Variable airgas ratio control with solenoid valve1 ndash 3 SizeT T-product15 ndash 50 Nominal inlet and outlet diameterRNF

Rp internal threadNPT internal thread

ISO fl angeN Quick opening quick closingKPQYW

Mains voltage 24 V DCMains voltage 100 V AC 5060 HzMains voltage 120 V AC 5060 HzMains voltage 200 V AC 5060 HzMains voltage 230 V AC 5060 Hz

SG

Position indicator with visual indicatorPosition indicator for 24 V with visual indicator

RL

Viewed from the right (in the direction of fl ow)Viewed from the left (in the direction of fl ow)

AB

Standard valve seatReduced valve seat

EKA

Connection kit for air control pressure psa and combus-tion chamber control pressure psc

compression fi ttingplastic hose coupling

NPT 18 adapter

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 33

Selection

6 7 AccessoriesModularly configurable withndash Screw plugsndash Pressure test pointsndash Pressure switch DGVC for inlet

andor outlet pressurendash Tightness control TCndash Bypasspilot gas valve VBY 8 for

size 1ndash Bypasspilot gas valve VAS 1For further information see page 37 (Accessories)

Position indicator

Plug with socket

Plug

Screwplugs

Pressuretest points

Pressure switch DGC Tightness

control TC

Bypasspilot gas valve VBY 8 for size 1

Bypasspilot gas valve VAS 1

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 34

7 Project planning informationDo not store or install the unit in the open airThe inlet pressure pu and the outlet pressure pd can be meas-ured on both sides of the valve body To increase the control accuracy an external impulse line can be connected instead of the pressure test point pd

VAD

pu

pd

(psa)

VAGpd

pu

psa

psa

VAD measurement point for the gas outlet pressure pd on the regulator body A combustion chamber control line (psc) can be connected to connection psa for maintaining a constant burner capacityVAG additional measurement point for the air control pressure psa on the regulator body

VAV

psapsc

pu

pd

VAH VRH

pu

pd-

pdpsa-

psa

VAV measurement point for the outlet pressure pd on the regulator bodyVAH additional measurement points for the outlet pressure pd- and the air control pressure psapsa- on the regulator body

7 1 Installation

GFK

VAGVAH

GFKVAD

Sealing material and thread cuttings must not be allowed to get into the valve housing Install a filter upstream of every system

gt20 mmgt0 79

The unit must not be in contact with masonry Minimum clear-ance 20 mm (079 inches)Ensure that there is sufficient space for installation and ad-justment

le +100 degCle +212 degF

The solenoid body heats up during operation ndash depending on ambient temperature (max 60degC140degF) and intrinsic heating (approx 40degC104degF)

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 35

In the case of double solenoid valves the position of the con-nection box can only be changed by removing the actuator and reinstalling it offset by 90deg or 180deg

If more than three valVario controls are installed in line the controls must be supported

The seals in some gas compression fittings are approved for temperatures of up to 70degC (158degF) This temperature limit will not be exceeded if the flow through the pipe is at least 1 msup3h (3531 SCFH) of gas and the maximum ambient temperature is 50degC (122degF)

7 1 1 Installation position

pu ge 80 mbar(80 hPa32 WC)

VAD VAG VAH VRH VAV

In humid environments black solenoid actuator in the vertical upright position only

VAD VAG VAH VRH black solenoid actuator in the vertical upright position or tilted up to the horizontal not upside downVAG VAH horizontal position only if pu ge 80 mbar (32 WC))VAV installation in the vertical position only black solenoid actuator in the vertical upright positionTo ensure that the airgas ratio control VAG the flow rate regulator VAH VRH or the variable airgas ratio control VAV can react quickly when the load is changed the impulse line for the air control pressure psa and for VAV the impulse line for the combustion chamber control pressure psc should be kept as short as possible The tube internal diameter for the impulse line must always be ge 39 mm (015)

VAH VRHIt is not permitted to install a gas solenoid valve VAS down-stream of flow rate regulator VAH VRH and upstream of fine-adjusting valve VMV The VAS would no longer be able to perform its function as a second safety valve if installed in the above-mentioned position

M

VMV

VAH

VASVAS

pd-

psa-psa

VMV

VAH pd-

psa-psa

The measuring orifice in the air line for impulse lines psa and psa- must always be installed downstream of the air control valve

Project planning information gt Installation

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 36

VAVThe impulse line for the combustion chamber control pres-sure psc must be fitted so that no condensation can enter the pressure regulator but rather flows back into the combustion chamber

7 2 Setting the low-fire rate on VAG VAH VRH VAV

-10 +05-05

ndash

+1

-15

mbar

+15

06

1 152

3

N V

+ +ndash

+30 -15+15

ndash

-3

+5

mbar

-5

N

+

VAG VAH VRH VAV

If the burner operates at low-fire rate the gasair mixture can be changed using the parallel shift of the characteristic curve by turning the adjusting screw ldquoNrdquoAdjusting range at low fire VAG VAH VRH -5 to +5 mbar (-195 to +195 WC) VAV -15 to +15 mbar (-06 to +06 WC)

7 3 Setting the high-fire rate on VAVTo set the high-fire rate the transmission ratio is changed us-ing the adjusting screw ldquoVrdquo until the required flue gas values are achievedTransmission ratio V = pdpsa = 061 to 31The settings N and V can influence each other and must be repeated if necessary

+N+V

-V

-N

VAV

psa [mbar]

p d [m

bar]

7 3 1 CalculationWith no connection to the combustion chamber control pres-sure psc pd = V times psa + NWith connection to the combustion chamber control pressure psc (pd - psc) = V times (psa - psc) + N

Project planning information

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 37

pu pd

21579

4836

085310

189

142

8 Accessories8 1 Gas pressure switch DG VC for VAx VRHType Adjusting range [mbar]DG 17VC 2 to 17DG 40VC 5 to 40DG 110VC 30 to 110DG 300VC 100 to 300

Scope of delivery 1 times pressure switch for gas 2 times retaining screws 2 times sealing rings

8 2 Gas pressure switch DG VCT for VAx T VRH TType Adjusting range [WC]DG 17VCT 08 to 68DG 40VCT 2 to 16DG 110VCT 12 to 44DG 300VCT 40 to 120

Scope of delivery 1 times gas pressure switch with AWG 18 connection wires 2 times retaining screws 2 times sealing ringsMonitoring the inlet pressure pu the electrical plug of the pressure switch for gas points towards the inlet flangeMonitoring the outlet pressure pd the electrical plug of the pressure switch for gas points towards the outlet flange

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 38

A BC

D

FE

ACD

F

B

E

8 3 Bypass valvepilot gas valve VAS 18 3 1 VAS 1 attached to VADVAGVAHVAV 1Scope of delivery A 1 times bypasspilot gas valve VAS 1 B 4 times O-rings C 4 times double nuts D 4 times connection parts E 1 times mounting aidBypass valve VAS 1 F 2 times connection pipes if the bypass valve has a blind flange

at the outlet sidePilot gas valve VAS 1 F 1 times connection pipe 1 times sealing plug if the pilot gas valve

has a threaded flange at the outlet side

Accessories

8 3 2 VAS 1 attached to VADVAGVAHVAV 2 VADVAGVAHVAV 3Scope of delivery A 1 times bypasspilot gas valve VAS 1 B 4 times O-rings C 4 times spacer sleeves D 4 times connection parts E 1 times mounting aidBypass valve VAS 1 F 2 times connection pipes if the bypass valve has a blind flange

at the outlet sidePilot gas valve VAS 1 F 1 times connection pipe 1 times sealing plug if the pilot gas valve

has a threaded flange at the outlet side

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 39

2

3

456

810

20

30

405060

80100

∆p [m

bar]

005 01 02 03 05 08 1 2 3 4 51

3

2

Qn [m3h]

1

01

02

03

0405

08

003

002

6 8 10

005 01 02 03 05 08 1 2 3 4 5003 6 8 10

20

005 01 02 03 05 08 1 2 3 4 5003 6 8 10 20

30

∆p [i

nch

WC]

1

2

3

456

810

20

30

40

04

004

006

00801

02

03

0506

08

Qn [SCFH]10 40 60 100 200 3001 500 10002 3 4 5

120 306 8

21 3 4 5 6 7 8 910

8 3 3 Flow rate

The characteristic flow rate curves have been measured for bypass valve VAS 1 with connection pipe diameter 1 to 10 mm (004 to 04) and for the pilot gas valve with 10 mm (04) connection pipe

Bypass valve connection pipe diameter [mm]

Pilo

t gas

val

ve 1

0 m

m (0

4)

conn

ectio

n pi

pe d

iam

eter

Accessories gt Bypass valvepilot gas valve VAS 1

= natural gas (ρ = 080 kgm3) = propane (ρ = 201 kgm3) = air (ρ = 129 kgm3)

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 40

Accessories

8 4 Bypass valvepilot gas valve VBY 8 for VADVAGVAHVAV 1

B

C

AVBY 8

VAx 1

55

(217)40(157)

70 (276)

80(315)

Rp frac14(pilot gas valve)

For mounting on VAD VAG VAH VAV 1 and double solenoid valve VCD VCG VCH VCV 1

8 4 1 Scope of delivery VBY 8I as bypass valveA 1 times bypass valve VBY 8IB 2 times retaining screws with 4 times O-rings both retaining screws

have a bypass orificeC 1 times grease for o-rings

8 4 2 Scope of delivery VBY 8R as pilot gas valveA 1 times pilot gas valve VBY 8RB 2 times retaining screws with 5 x O-rings one retaining screw

has a bypass orifice (2 x O-rings) the other does not (3 x O-rings)

C 1 times grease for O-rings

8 4 3 SelectionType I R W Q K 6L -R -L E B D 05

VBY 8

Order exampleVBY 8RW6L-LED

8 4 4 Type codeCode DescriptionVBY Gas solenoid valve8 Nominal sizeIR

For internal gas pick-up as bypass valveFor external gas pick-up as pilot gas valve

KQW

Mains voltage 24 V DC Mains voltage 120 V AC 5060 HzMains voltage 230 V AC 5060 Hz

6L Electrical connection via plug and socket with LED-R-L

Attachment side of main valve right-hand sideAttachment side of main valve left-hand side

EB

Attached to the VAxEnclosed (separate packing unit)

05D

Nozzle diameter = 05 mm (002)Flow adjustment

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 41

2

01

02

03

05

081

3

456

810

20

30

405060

80100

∆p [m

bar]

1

3

201 02 03 05 1 2 3001 003 4

Qn [m3h]

02 03 05 1 2

01 02 05

002 006

002

002 006 1

0010006 005 01

001

0003

0006 2 3

VBY 8DVBY 805

∆p [i

nch

WC]

1

2

3

456

810

20

30

40

040506

08

1

Qn [SCFH]10 40 60 1005 2081 2 30402

01

02

03

004005006

008

Adjusting range

8 4 5 Flow rateVBY 8 D

+

-

The flow rate can be set by turning the flow rate restrictor (4 mm016 Allen screw) frac14 of a turn Flow rate 10 to 100

VBY 8 05The flow is routed through a 05 mm (002) nozzle and thus has a fixed characteristic flow rate curve Adjustment is not possible

8 4 6 Technical dataInlet pressure pu max 500 mbar (7 psig)Ambient temperature 0 to +60degC (32 to 140degF) no condensation permittedStorage temperature 0 to +40degC (32 to 104degF) no condensation permittedPower consumption 24 V = 8 W 120 V = 8 W 230 V = 95 WEnclosure IP 54

Accessories gt Bypass valvepilot gas valve VBY 8 for VADVAGVAHVAV 1

= natural gas (ρ = 080 kgm3) = propane (ρ = 201 kgm3) = air (ρ = 129 kgm3)

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 42

TC 116VB C

56(22)

49(193)

27(106)

A

A

VCx 1 VCx 2VCx 3

8 5 Tightness control TC 116Vfor VAx 1 ndash 3An adapter plate is required to attach the tightness control to the right- or left-hand side of the pressure regulator with gas solenoid valveScope of delivery A 1 times adapter plate B 2 times O-rings C 2 times retaining screwsFor attachment to left-hand side Order No 74922391 right-hand side Order No 74921995

8 6 Pressure test pointsTest points to check the inlet pressure pu and outlet pressure pdScope of delivery 1 x pressure test points with 1 x profiled sealing rings Order No 74923390

8 7 Cable gland setWhen wiring a double solenoid valve with pressure regula-tor VCx the connection boxes are to be connected using a cable gland setThe cable gland set can only be used if the connection boxes are at the same height and on the same side and if both valves are equipped either with or without a proof of closure switchVA 1 Order No 74921985 VA 2 Order No 74921986 VA 3 Order No 74921987

Accessories

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 43

A B

D

C

Accessories

8 9 Differential pressure orifice

Size PipeDN

Differential pressure orifi cewith outlet dia

1 15 17 mm 0671 20 25 mm 0981 25 30 mm 1182 40 46 mm 1813 50 58 mm 228

If pressure regulator VADVAGVAV 1 is retrofitted upstream of gas solenoid valve VAS 1 a DN 25 differential pressure orifice with outlet opening d = 30 mm (118) must be inserted at the outlet of the pressure regulatorIn the case of pressure regulator VAx 115 or VAx 120 the DN 25 differential pressure orifice must be ordered separately and retrofitted Order No 74922240

8 8 Seal set VA 1 ndash 3VA 1 Order No 74921988 VA 2 Order No 74921989 VA 3 Order No 74921990Scope of deliveryA 1 times double block seal B 2 times O-rings (flange) C 2 times O-rings (pressure switch) for pressure test pointscrew plug D 2 times sealing rings (flat sealing) and 2 times profiled sealing rings

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 44

BA

C

pd-

8 11 Attachment blockFor locked installation of pressure gauge and other acces-soriesScope of delivery A 1 times attachment block B 2 times self-tapping screws for installation C 2 times O-rings

Accessories

8 10 Retaining frameIn the event that a pressure regulator VAx is installed at a later point upstream of a gas solenoid valve VAS a measur-ing orifice VMO or a fine-adjusting valve VMV the retaining frame must be fitted at the inlet of the second device in order to fasten the differential pressure orifice at the regulator outlet Order the retaining frame separatelyRetaining frame for Size 1 Order No 74923029 Size 2 Order No 74923030 Size 3 Order No 74923031

8 12 Gas control lineFine-adjusting valve VMV can be installed on the flow rate regulator VAH for fine adjustment of the gas flow rateThe gas control line for gas outlet pressure pd- is available with 2 18 compression fittingsSize 1 Order No 74924458 Size 2 Order No 74924459

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 45

8 13 Measuring orifice VMOThe measuring orifice VMO is designed to reduce the gas and air flow rates and is installed downstream of the valVario control The measuring orifice is available with Rp internal thread (NPT internal thread) or flange to ISO 7005See wwwdocuthekcom Elster Kromschroumlder Krom-schroumlder LBE Products 03 Valves and butterfly valves valVario accessories Type of document Technical Informa-tion VMO

Accessories

8 14 Filter module VMFUsing the filter module VMF the gas flow upstream of the gas solenoid valve VAS and the airgas ratio control is cleaned The filter module is available with Rp internal thread (NPT internal thread) or flange to ISO 7005 and can also be supplied with fitted pressure switch as an optionSee wwwdocuthekcom Elster Kromschroumlder Krom-schroumlder LBE Products 03 Valves and butterfly valves valVario accessories Type of document Technical Informa-tion VMF

8 15 Fine-adjusting valve VMVThe flow rate is set using the fine-adjusting valve VMV The fine-adjusting valve is available with Rp internal thread (NPT internal thread) or flange to ISO 7005See wwwdocuthekcom Elster Kromschroumlder Krom-schroumlder LBE Products 03 Valves and butterfly valves valVario accessories Type of document Technical Infor-mation VMV

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 46

9 Technical dataGas types natural gas LPG (gaseous) biologically produced methane (max 01 -by-vol H2S) or clean air other gases on request The gas must be clean and dry in all temperature conditions and must not contain condensateCE and FM approved UL listed max inlet pressure pu 10 ndash 500 mbar (4 ndash 200 WC) FM approved (230 V AC 120 V AC 24 V DC) non opera-tional pressure 700 mbar (10 psig)ANSICSA approved (230 V AC 120 V AC 24 V DC) up to 350 mbar (5 psig)Opening time of the solenoid valve quick opening le 05 s Closing time quick closing lt 1 sMedium and ambient temperatures -20 to +60degC (-4 to +140degF) no condensation permittedStorage temperature -20 to +40degC (-4 to +104degF)Enclosure IP 65Valve housing aluminium valve seal NBRConnection flanges with internal thread Rp to ISO 7-1 NPT to ANSIASMESafety valve Class A to EN 161 Factory Mutual Research Class 7400 Process Control Valves (230 V AC 120 V AC 24 V DC) ANSI Z2121 and CSA 65 ANSI Z2118 and CSA 63Control class A to EN 88-1Control range up to 101

Mains voltage 230 V AC +10-15 5060 Hz 200 V AC +10-15 5060 Hz 120 V AC +10-15 5060 Hz 100 V AC +10-15 5060 Hz 24 V DC plusmn20Duty cycle 100Power factor of the solenoid coil cos φ = 09Power consumption

Type Voltage Power

VAx 1

24 V DC 25 W ndash100 V AC 25 W (26 VA)120 V AC 25 W (26 VA)200 V AC 25 W (26 VA)230 V AC 25 W (26 VA)

VAx 2 VAx 3

24 V DC 36 W ndash100 V AC 36 W (40 VA)120 V AC 40 W (44 VA)200 V AC 40 W (44 VA)230 V AC 40 W (44 VA)

VBY24 V DC 8 W ndash

120 V AC 8 W ndash230 V AC 95 W ndash

Cable gland M20 times 15Electrical connection cable with max 25 mm2 (AWG 12) or plug with socket to EN 175301-803

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 47

Position indicator contact rating

Type Voltage Min current(resistive load)

Max current(resistive load)

VAxS VCxS 12 ndash 250 V AC 5060 Hz 100 mA 3 AVAxG VCxG 12 ndash 30 V DC 2 mA 01 A

Position indicator switching frequency max 5 times per minute

Switching current [A]

Switching cyclescos φ = 1 cos φ = 06

01 500000 50000005 300000 250000

1 200000 1000003 100000 ndash

Limited to max 200000 cycles for heating systems

9 1 VADOutlet pressure pd VAD-25 25 ndash 25 mbar (1 ndash 10 WC) VAD-50 20 ndash 50 mbar (8 ndash 20 WC) VAD-100 35 ndash 100 mbar (14 ndash 40 WC)Combustion chamber control pressure psc (connection psa)

-20 to +20 mbar (-78 to +78 WC)

VAD

pu

pd

(psa)

9 2 VAGOutlet pressure pd 05 ndash 100 mbar (02 ndash 40 WC)Air control pressure psa 05 ndash 100 mbar (02 ndash 40 WC)

Adjusting range at low fire plusmn5 mbar (plusmn2 WC)Transmission ratio of gas to air 11The inlet pressure must always be higher than the air control pressure psa + pressure loss ∆p + 5 mbar (2 WC)

VAGpd

pu

psa

psa

VAGK 1 x 18 coupling for plastic hose (internal dia 39 mm (015) external dia 61 mm (024)) or VAGE 1 x 18 compression fitting for 6 times 1 tube or VAGA 1 x NPT 18 adapter or VAGN zero governor with breathing orifice

9 3 VAH VRHAir control pressure psa 06 ndash 100 mbar (024 ndash 40 WC) Differential air pressure ∆psa (psa - psa-) 06 ndash 50 mbar (024 ndash 197 WC) Differential gas pressure ∆pd (pd - pd-) 06 ndash 50 mbar (024 ndash 197 WC)Transmission ratio of gas to air 11The inlet pressure must always be higher than the differen-tial air pressure ∆psa + pressure loss ∆p + max gas pres-sure on burner + 5 mbar (2 WC)Adjusting range at low fire plusmn5 mbar (plusmn2 WC)

Technical data

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 48

VAHVRH

pd-

pu

psa-

psa

Connection of the air control pressure psaVAHE VRHE 3 x 18 compression fitting for 6 times 1 tube or VAHA VRHA 3 x NPT 18 adapter

9 4 VAVOutlet pressure pd 05 ndash 30 mbar (02 ndash 117 WC)Air control pressure psa 04 ndash 30 mbar (015 ndash 117 WC)Combustion chamber control pressure psc

-20 to +20 mbar (-78 to +78 WC)Min control pressure differential psa - psc 04 mbar (015 WC)Min pressure differential pd - psc 05 mbar (02 WC)Adjusting range at low fire plusmn15 mbar (plusmn06 WC)Transmission ratio of gas to air 061 to 31The inlet pressure pu must always be higher than the air control pressure psa times transmission ratio V + pressure loss ∆p + 15 mbar (06 WC)

pu

pd psapsc

VAV

VAVK 2 x plastic hose couplings (internal dia 39 mm (015) external dia 61 mm (024)) or VAVE 2 x 18 compression fitting for 6 times 1 tube or VAVA 2 x NPT 18 adapter

Technical data

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 49

9 5 Safety-specific characteristic values for VAx 1 ndash 3For SILSuitable for Safety Integrity Level SIL 1 2 3

Diagnostic coverage DC 0

Type of subsystem Type A to EN 61508-2 74312

Operating mode High demand mode pursu-ant to EN 61508-4 3512

For PLSuitable for Performance Level PL a b c d e

Category B 1 2 3 4Common cause failure CCF gt 65Application of essential safety requirements Satisfied

Application of tried-and-tested safety requirements Satisfied

For SIL and PL

B10d value

Operating cyclesVAD VAG VAV VAH 1 10094360VAD VAG VAV VAH 2 8229021VAD VAG VAV VAH 3 6363683

Hardware fault tolerance (1 valve) HFT 0

Hardware fault tolerance (2 valves) HFT 1

Safe failure fraction SFF gt 90Fraction of undetected com-mon cause failures β ge 2

Max service life under operating conditions10 years after date of production plus max 12 year in stor-age prior to first use or once the given number of operating cycles has been reached depending on which is achieved firstThe devices are suitable for single-channel systems (HFT = 0) up to SIL 2PL d and up to SIL 3PL e when two re-dundant valves are installed in a double-channel architecture (HFT = 1) provided that the complete system complies with the requirements of EN 61508ISO 13849

For a glossary of terms see page 53 (Glossary)

Technical data

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 50

nop 1hnop 1a

sB10d

T10d aPFHD (1 VAx) 1h

PFHD (2 VAx) 1h

PFDavg (1 VAx)

PFDavg (2 VAx)

Technical data gt Safety-specific characteristic values for VAx 1 ndash 3

9 5 1 Determining the PFHD value the λD value and the MTTFd value

PFHD = λD = x nop= 1MTTFd

01B10d

PFDavg = x λD x 24 x 365 x T10d 12

Type

Cycle time

suitable for

suitable for

PFHD = Probability of dangerous failure (HDM = high de-mand mode) [1hour]PFDavg = Average probability of dangerous failure on de-mand (LDM = low demand mode)λD = Mean dangerous failure rate [1hour]MTTFd = Mean time to dangerous failure [hours]nop = Demand rate (mean number of annual operations) [1hour]

9 5 2 Calculating the PFHD and PFDavg

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 51

VAD VAG VAH VAV

H1

Rp frac14(NPT frac14)

H2

E

LF

F

H4

H3

B

VAxS VAxF

L2G

G

Technical data

9 6 Dimensions

Type

Connec-tion Dimensions

WeightRpNPT DN

L L2 E F G H1 H2 H3 H4 Bmm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch kg lbs

VAx 115 12 15 75 29 ndash ndash 75 29 15 06 ndash ndash 143 56 82 32 161 63 117 46 97 38 18 40VAH 115 12 15 75 29 ndash ndash 75 29 15 06 ndash ndash 143 56 100 39 161 63 135 53 97 38 2 44VAx 120 34 20 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 82 33 161 63 117 46 97 38 19 42VAH 120 34 20 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 100 39 161 63 135 53 97 38 21 46VAx 125 1 25 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 82 33 161 63 117 46 97 38 19 42VAH 125 1 25 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 100 39 161 63 135 53 97 38 21 46VAx 240 112 40 128 50 200 79 85 33 29 11 66 26 170 67 112 44 191 75 162 64 125 49 44 97VAH 240 112 40 128 50 200 79 85 33 29 11 66 26 170 67 132 52 191 75 182 72 125 49 47 104VAx 350 2 50 155 61 230 91 85 33 36 14 74 29 180 70 135 53 201 79 196 77 160 63 61 134VAH 350 2 50 155 61 230 91 85 33 36 14 74 29 180 70 156 61 201 79 217 85 160 63 64 141

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 52

10 Converting unitssee wwwadlatusorg

11 Maintenance cyclesAt least once per annum at least twice per annum for biologi-cally produced methaneIf the flow rate drops clean the strainer

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 53

12 Glossary12 1 Diagnostic coverage DCMeasure of the effectiveness of diagnostics which may be determined as the ratio between the failure rate of detected dangerous failures and the failure rate of total dangerous failuresNOTE Diagnostic coverage can exist for the whole or parts of a safety-related system For example diagnostic cover-age could exist for sensors andor logic system andor final elements Unit see EN ISO 13849-12008

12 2 Mode of operationHigh demand mode or continuous modeOperating mode where the frequency of demands for opera-tion made on a safety-related system is greater than one per year or greater than twice the proof-test frequencysee EN 61508-42008

12 3 CategoryClassification of the safety-related parts of a control system in respect of their resistance to faults and their subsequent behaviour in the fault condition and which is achieved by the structural arrangement of the parts fault detection andor by their reliability see EN ISO 13849-12008

12 4 Common cause failure CCFFailures of different items resulting from a single event where these failures are not consequences of each othersee EN ISO 13849-12008

12 5 Fraction of undetected common cause failures β Fraction of undetected failures of redundant components due to a single event whereby these failures are not based on mutual causesNOTE β is expressed as a fraction in the equations and as a percentage elsewheresee EN 61508-62010

12 6 B10d valueMean number of cycles until 10 of the components fail dan-gerouslysee EN ISO 13849-12008

12 7 T10d valueMean time until 10 of the components fail dangerouslysee EN ISO 13849-12008

12 8 Hardware fault tolerance HFTA hardware fault tolerance of N means that N + 1 is the mini-mum number of faults that could cause a loss of the safety functionsee IEC 61508-22010

12 9 Mean dangerous failure rate λD Mean rate of dangerous failures during operation time (T10d) Unit 1hsee EN ISO 13849-12008

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 54

12 10 Safe failure fraction SFFFraction of safe failures related to all failures which are as-sumed to appearsee EN 13611A22011

12 11 Probability of dangerous failure PFHD Value describing the likelihood of dangerous failure per hour of a component for high demand mode or continuous mode Unit 1hsee EN 13611A22011

12 12 Mean time to dangerous failure MTTFd Expectation of the mean time to dangerous failuresee EN ISO 13849-12008

12 13 Demand rate nop Mean number of annual operationssee EN ISO 13849-12008

12 14 Average probability of dangerous failure on demand PFDavg (LDM = 1 ndash 10 switching cyclesyear)Average probability of a dangerous failure of the safety function on demand (LDM = low demand mode)see EN 61508-6

Glossary

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415

Finally we are offering you the opportunity to assess this ldquoTechnical Information (TI)rdquo and to give us your opinion so that we can improve our documents further and suit them to your needs

ClarityFound information quicklySearched for a long timeDidnrsquot find informationWhat is missing

ComprehensionCoherentToo complicatedNo answer

ScopeToo littleSufficientToo wideNo answer

No answer

NavigationI can find my way aroundI got ldquolostrdquoNo answer

UseTo get to know the productTo choose a productPlanningTo look for information

My scope of functionsTechnical departmentSalesNo answer

Remarks

(Adobe Reader 7 or higher required) wwwadobecom

Elster GmbH Postfach 2809 middot 49018 Osnabruumlck Strotheweg 1 middot 49504 Lotte (Buumlren) GermanyT +49 541 1214-0 F +49 541 1214-370 infokromschroedercomwwwkromschroedercom

The current addresses of our international agents are available on the Internetwwwkromschroederdeindexphpid=718ampL=1

We reserve the right to make technical modifications in the interests of progressCopyright copy 2015 Elster GmbH All rights reserved

Contact

Feedback

0325

0530

  • Pressure regulators with solenoid valve VAD VAG VAV VAH
  • Flow rate regulator VRH
  • Pressure regulators with double solenoid valve VCD VCG VCV VCH
  • Contents
  • 1 Application
    • 11 Examples of application
      • 111 Constant pressure control
      • 112 Constant pressure control with two gas solenoid valves
      • 113 Constant pressure control with max pressure switch
      • 114 Constant pressure control with non-controlled pilot gas outlet
      • 115 Modulating control
      • 116 Modulating control with two gas solenoid valves
      • 117 Modulating control with two gas solenoid valves and inlet pressure switch
      • 118 HighLow control
      • 119 Zero pressure control
      • 1110 Staged flow rate control
      • 1111 Continuous or staged flow rate control
      • 1112 Modulating control with variable airgas ratio control with gas solenoid valve
      • 1113 Modulating control in residential heat generation
          • 2 Certification
          • 3 Function
            • 31 VAD VAG VAH VRH VAV
              • 311 Pressure regulator for gas VAD
              • 312 Airgas ratio control VAG
              • 313 Flow rate regulators VAH VRH
              • 314 Variable airgas ratio control VAV
              • 315 Pressure regulator with gas solenoid valve VAxS position indicator with visual indicator
                • 32 Animation
                • 33 Connection diagram
                  • 331 VAx with M20 cable gland
                  • 332 VAx with plug
                  • 333 VAS with VADVAGVAHVAV with M20 cable gland
                  • 334 VAS with VADVAGVAHVAV with plug
                      • 4 Replacement possibilities for MODULINE pressure regulators with gas solenoid valve
                        • 41 GVS GVI GVIB GVR and GVRH are to be replaced by VAD VAG VAG+VAS VAH and VAV
                          • 5 Flow rate
                            • 51 Selection example for VAD
                              • 511 Calculate VAD
                                • 52 Selection example for VAG VAH VRH VAV
                                  • 521 CalculateVAG VxHVAV
                                    • 53 Selection example for zero governor VAGN
                                      • 531 Calculate VAGN
                                          • 6 Selection
                                            • 61 Selection table for pressure regulator with solenoid valve VAD
                                            • 62 Type code for VAD
                                            • 63 Selection table for airgas ratio control with solenoid valve VAG flow rate regulators VAH VRH
                                            • 64 Type code for VAG VAH VRH
                                            • 65 Selection table for variable airgas ratio control with solenoid valve VAV
                                            • 66 Type code for VAV
                                            • 67 Accessories
                                              • 7 Project planning information
                                                • 71 Installation
                                                  • 711 Installation position
                                                    • 72 Setting the low-fire rate on VAG VAH VRH VAV
                                                    • 73 Setting the high-fire rate on VAV
                                                      • 731 Calculation
                                                          • 8 Accessories
                                                            • 81 Gas pressure switch DGVC for VAx VRH
                                                            • 82 Gas pressure switch DGVCT for VAxT VRHT
                                                            • 83 Bypass valvepilot gas valve VAS 1
                                                              • 831 VAS 1 attached to VADVAGVAHVAV 1
                                                              • 832 VAS 1 attached to VADVAGVAHVAV 2 VADVAGVAHVAV 3
                                                              • 833 Flow rate
                                                                • 84 Bypass valvepilot gas valve VBY 8 for VADVAGVAHVAV 1
                                                                  • 841 Scope of delivery VBY 8I as bypass valve
                                                                  • 842 Scope of delivery VBY 8R as pilot gas valve
                                                                  • 843 Selection
                                                                  • 844 Type code
                                                                  • 845 Flow rate
                                                                  • 846 Technical data
                                                                    • 85 Tightness control TC 116V
                                                                    • 86 Pressure test points
                                                                    • 87 Cable gland set
                                                                    • 88 Seal set VA 1thinspndashthinsp3
                                                                    • 89 Differential pressure orifice
                                                                    • 810 Retaining frame
                                                                    • 811 Attachment block
                                                                    • 812 Gas control line
                                                                    • 813 Measuring orifice VMO
                                                                    • 814 Filter module VMF
                                                                    • 815 Fine-adjusting valve VMV
                                                                      • 9 Technical data
                                                                        • 91 VAD
                                                                        • 92 VAG
                                                                        • 93 VAH VRH
                                                                        • 94 VAV
                                                                        • 95 Safety-specific characteristic values for VAx 1thinspndashthinsp3
                                                                          • 951 Determining the PFHD value the λD value and the MTTFd value
                                                                          • 952 Calculating the PFHD and PFDavg
                                                                            • 96 Dimensions
                                                                              • 10 Converting units
                                                                              • 11 Maintenance cycles
                                                                              • 12 Glossary
                                                                                • 121 Diagnostic coverage DC
                                                                                • 122 Mode of operation
                                                                                • 123 Category
                                                                                • 124 Common cause failure CCF
                                                                                • 125 Fraction of undetected common cause failures β
                                                                                • 126 B10d value
                                                                                • 127 T10d value
                                                                                • 128 Hardware fault tolerance HFT
                                                                                • 129 Mean dangerous failure rate λD
                                                                                • 1210 Safe failure fraction SFF
                                                                                • 1211 Probability of dangerous failure PFHD
                                                                                • 1212 Mean time to dangerous failure MTTFd
                                                                                • 1213 Demand rate nop
                                                                                • 1214 Average probability of dangerous failure on demand PFDavg
                                                                                  • Feedback
                                                                                  • Contact
                                                                                      1. naechste_Seite 24
                                                                                      2. naechste Seite 18
                                                                                      3. naechste Seite 6
                                                                                      4. naechste Seite 16
                                                                                      5. naechste Seite 14
                                                                                      6. naechste Seite 25
                                                                                      7. naechste_Seite 11
                                                                                      8. naechste_Seite 17
                                                                                      9. fbArbeitspunkt_Min Ja
                                                                                      10. fbArbeitspunkt Ja
                                                                                      11. ftProgramm Standard-Programm
                                                                                      12. fz_kv
                                                                                      13. fz_pe 80
                                                                                      14. fz_pG 60
                                                                                      15. fzDelta_p_Soll 20
                                                                                      16. ftEinheit_Druck mbar
                                                                                      17. fatTyp [115]
                                                                                      18. fbArbeitspunkt_Min_2 Ja
                                                                                      19. fbArbeitspunkt_2 Ja
                                                                                      20. ftRegler_Typ VAG
                                                                                      21. ftProgramm_2 Standard-Programm
                                                                                      22. fz_kv_2
                                                                                      23. fatMedium [08]
                                                                                      24. fzDichte 08
                                                                                      25. ftEinheit_Dichte kgm3
                                                                                      26. fzV_Norm 30
                                                                                      27. ftEinheit_Volstrom m3h
                                                                                      28. fz_pe_2 80
                                                                                      29. fz_pG_2 60
                                                                                      30. fzDelta_p_Soll_2 20
                                                                                      31. ftEinheit_Druck2 [mbar]
                                                                                      32. ftEinheit_Geschw [ms]
                                                                                      33. fatTyp_2 [10954451150103322]
                                                                                      34. fbArbeitspunkt_Min_3 Ja
                                                                                      35. fbArbeitspunkt_3 Ja
                                                                                      36. ftProgramm_3 Standard-Programm
                                                                                      37. fz_kv_3
                                                                                      38. fz_pe_3 20
                                                                                      39. fz_pG_3 0
                                                                                      40. fzDelta_p_Soll_3 20
                                                                                      41. fatTyp_3 [123]
                                                                                      42. fatSchaltleistung [6363683]
                                                                                      43. fz_nop_Stunde 1
                                                                                      44. fz_nop_Jahr 8760
                                                                                      45. fzZyklus 3600
                                                                                      46. fzB10d 6363683
                                                                                      47. fzT10d 10
                                                                                      48. fzPFHd_1V 15714170551864384e-8
                                                                                      49. fzPFDavg_1V
                                                                                      50. ftGeeignet_1V PL d SIL 2
                                                                                      51. fzPFHd_2V 33505832253532625e-10
                                                                                      52. fzPFDavg_2V
                                                                                      53. ftGeeignet_2V PL e SIL 3
                                                                                      54. ftUebersicht Off
                                                                                      55. ftVerstaendlichkeit Off
                                                                                      56. ftFehlende_Info
                                                                                      57. ftUmfang Off
                                                                                      58. ftVerwendung_1 Off
                                                                                      59. ftVerwendung_2 Off
                                                                                      60. ftVerwendung_3 Off
                                                                                      61. ftVerwendung_4 Off
                                                                                      62. ftNavigation Off
                                                                                      63. ftTaetigkeitsbereich Off
                                                                                      64. ftBemerkung
                                                                                      65. Michael Rehkamp Elster Kromschroumlder>btnSenden
Page 15: VAD, VAG, VAV, VAH, VRH, VCD, VCG, VCV, VCH · PDF fileVAD, VAG, VAH, VAV, VRH, VCD, VCG, VCV, VCH · Edition 04.15 6 VAD VAD VAS 1 .1 Examples of application 1 .1 .1 Constant pressure

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 15

3 Function3 1 VAD VAG VAH VRH VAVThe regulator is closed when it is disconnected from the power supplyOpening connect the system to the electrical power supply (alternating voltage will be rectified) The blue LED lights up The coilrsquos magnetic field pulls the armature upwards and clears the supply nozzle for the gas inlet pressure pu The gas passes through the internal impulse tube to the adjustment diaphragm and then pushes the valve disc open The outlet pressure is applied to the servo diaphragm via the internal feedback

The servo regulator then maintains a set constant outlet pres-sure pd

3 1 1 Pressure regulator for gas VADThe nominal outlet pressure pd is defined by the control spring

Servoregulator

Valve

Armature

Valve disc

Adjustmentdiaphragm

Servodiaphragm

Internalfeedback

Controlspring

Solenoid coil

Supplynozzle

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 16

3 1 2 Airgas ratio control VAGThe airgas ratio control VAG controls the outlet pressure pd depending on the variable air control pressure psaThe ratio of gas pressure to air pressure remains constant 11 The VAG is suitable for a control range up to 101If the burner operates at low-fire rate the gasair mixture can be changed by adjusting the zero point spring ldquoNrdquo

Function

psa

pd

Zero point setting N zero point spring

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 17

Function

3 1 3 Flow rate regulators VAH VRHThe flow rate regulators VAH VRH control the gas flow rate depending on the variable air flow rate The ratio of gas flow rate to air flow rate remains constant If the burner operates at low-fire rate the gasair mixture can be changed by adjusting the zero point spring ldquoNrdquoIn addition flow rate regulator VAH is designed as a gas solenoid valve and shuts off the gas or air supply safely

psa

psa-

pd-

pdInternal feedback

Zero point setting N zero point spring

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 18

3 1 4 Variable airgas ratio control VAVThe servo regulator maintains a set constant outlet pressure pd The variable airgas ratio control VAV controls the outlet pressure pd depending on the variable air control pressure psa The ratio of gas pressure to air pressure remains constantThe settings N and V can be changed and read off from both sides of the unit using the adjusting screwsThe ratio of gas pressure to air pressure at low-fire rate can be changed by adjusting the zero point setting N By turning the adjusting screw ldquoNrdquo the force of the zero point spring and thus the zero point is changed by plusmn 15 mbar (06 WC) see page 34 (Project planning information)The high-fire rate is set by turning the adjusting screw ldquoVrdquo until the required flue gas values are achieved see page 34 (Project planning information) The ratio of gas pressure to air pressure can be set from 061 to 31The settings N and V influence each other and the adjustment process must be repeated if necessaryThe outlet pressure pd is applied to the servo diaphragm via the internal feedback The combustion chamber control pres-sure psc is transmitted to the space under the air and servo diaphragms via an impulse lineThe pressure differential psa - psc is achieved on the air diaphragm and the pressure differential pd - psc on the servo diaphragm This ensures that pressure fluctuations in the combustion cham-ber can be compensated The flue gas values remain constant in the case of fluctuations in the combustion chamber pressure (pd - psc) = (psa - psc) times V + N

Function

pdpsc

psa

Air diaphragm

Transmission ratio V

Zero point setting N zero point spring

Internalfeedback

Adjustment diaphragm

Servo diaphragm

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 19

1 COM

2 NO

3 NC

3 1 5 Pressure regulator with gas solenoid valve VAx S position indicator with visual indicatorOpening when the pressure regulator is opened the posi-tion indicator switches The visual indicator is activated The ldquoopenrdquo signal is marked in red The double valve seat opens to release the volume of gasClosing the pressure regulator VAx is disconnected from the voltage supply and the closing spring presses the double valve disc on to the valve seat The position indicator is actuated The visual indicator is white for ldquoclosedrdquoThe actuator cannot be rotated on a pressure regulator with a position indicator and a visual indicatorNOTE NFPA 86 ndash the following must be taken into account as soon as the capacity of the pilot or main burner exceeds 117 kW (400000 BTUh) safety shut-off valve VASS must be fitted with a proof of closure overtravel switch with a visual position indicator and the burner-side pressure regulator with gas solenoid valve VAxS must also be fitted with a position indicator with visual indicator The closed position can be verified using the proof of closure switch of the gas solenoid valve VASS

Function

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 20

3 2 AnimationThe interactive animation shows the function of the valVario controls VADVAGVAHVAVClick on the picture The animation can be controlled using the control bar at the bottom of the window (as on a DVD player) To play the animation you will need Adobe Reader 7 or a newer version If you do not have Adobe Reader on your system you can download it from the Internet

Go to wwwadobecom click on ldquoAdobe Readerrdquo at the bottom of the page and follow the instructionsIf the animation does not start to play you can download it from the document library (wwwdocuthekcom) as an inde-pendent application

Function

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 21

3 3 Connection diagramWiring to EN 60204-1Connection diagram for VAxS with position indicator ndash see page 19 (Pressure regulator with gas solenoid valve VAxS position indicator with visual indicator)

3 3 1 VAx with M20 cable gland

L1 (+)

N (ndash)

3 3 2 VAx with plug

1 = N (-)

2 = L1 (+)

3 3 3 VAS with VADVAGVAHVAV with M20 cable glandL1V1 (+)

N (-)

L1V2 (+)

3 3 4 VAS with VADVAGVAHVAV with plug2 = L1V1 (+)

1 = N (-)

3 = L1V2 (+)

Function

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 22

4 Replacement possibilities for MODULINE pressure regulators with gas solenoid valve4 1 GVS GVI GVIB GVR and GVRH are to be replaced by VAD VAG VAG+VAS VAH and VAV

Type TypeGVS Pressure regulator with gas solenoid valve Pressure regulator with gas solenoid valve VADGVI Airgas ratio control with gas solenoid valve Airgas ratio control with gas solenoid valve VAG

GVIB Airgas ratio control with gas solenoid valve and bypass valve

Airgas ratio control with gas solenoid valve and bypass valve VAG+VAS

GVRH Flow rate regulator with gas solenoid valve Flow rate regulator with gas solenoid valve VAHGVR Variable airgas ratio control with gas solenoid valve Variable airgas ratio control with solenoid valve VAV115125 Flange 38 Size 115

Size 125 on request

115125 Flange frac12 Size 115

Size 125 Size 1 DN 15 115

115125 Flange frac34 Size 115

Size 125 Size 1 DN 20 120

115125 Flange 1 Size 115

Size 125 Size 1 DN 25 125

232240 Flange 1 Size 232

Size 240 on request

232240 Flange 1frac12 Size 232

Size 240 Size 2 DN 40 240

350 Flange 1frac12 Size 350 on request350 Flange 2 Size 350 Size 3 DN 50 350ML MODULINE + Rp internal thread connection fl anges Rp internal thread RTML MODULINE + NPT internal thread connection fl anges NPT internal thread N01 pu max 100 mbar (15 psig) pu max 500 mbar (7 psig) 02 200 mbar (3 psig) 500 mbar (7 psig)

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 23

Replacement possibilities for MODULINE pressure regulators with gas solenoid valve gt GVS GVI GVIB GVR and GVRH are to be replaced by VAD VAG VAG+VAS VAH and VAV

ContinuationType Type

Quick opening Quick opening NF1 Control ratio 11 Control ratio 11 K Mains voltage 24 V DC Mains voltage 24 V DC K

ndash 100 V AC PQ 120 V AC 120 V AC Q

ndash 200 V AC YT 220240 V AC 230 V AC W3 Electrical connection via terminals Electrical connection via terminals 6 Electrical connection via socket Electrical connection via socket 9 Metal terminal connection box Electrical connection via terminals S Position indicator Position indicator with visual indicator SG Position indicator for 24 V Position indicator for 24 V with visual indicator GM Suitable for biologically produced methane Suitable for biologically produced methane

Pressure test point at the inlet Pressure test point at the inlet and outlet Outlet pressure pd -25

Outlet pressure pd 25 ndash 25 mbar (1 ndash 10 WC)

2 ndash 90 mbar (08 ndash 36 WC) 20 ndash 50 mbar (8 ndash 20 WC) -5035 ndash 100 mbar (14 ndash 40 WC) -100Standard seat A

ExampleGVS 350ML01T3with Rp 2 connection flanges

ExampleVAD 350RNW-100A

with test points

= standard = available Pressure test points may be attached at the left- andor right-hand side Position indicator with visual indicator can be attached at the left- or right-hand side

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 24

∆p [i

nch

WC]

Qn [SCFH]100 400 600 4000 60001000 200020 30 40 50 200 3006015 80

1

08

1

2

3

4

56

8

10

20

30

40

5060

80

100

200

∆p [m

bar]

5

8

3

20

10

30

40

80

60

300

400

50

04 06 1 2 3 4 5 808 10 20 30 402

03 60 100 200

100

200

500

1

3

2

04 06 08 1 2 3 4 5 6 8 10 20 30 40

04 06 08 1 2 3 4 5 6 8 10

200

80 10020 3003

03Qn [m3h]

02

50 60 80 100

40 50 60

VAD

115

B

VAD

120

AVA

D 12

5A

P1P2

VAD

240

AVA

D 35

0A

= natural gas (ρ = 080 kgm3) = propane (ρ = 201 kgm3) = air (ρ = 129 kgm3)

The characteristic flow rate curves have been meas-ured with the specified flanges and a fitted strainer If two or more valves are combined the pressure loss of each additional valve drops by approx 5

metric imperial

Enter densityFlow rate Qn

Inlet pressure pu

Outlet pressure pd

Product RV v

Pressure loss ∆p

∆pmin

5 Flow rate5 1 Selection example for VADNatural gas Flow rate Qmax = 30 m3h Inlet pressure pu = 80 mbar Outlet pressure pd = 60 mbarThe desired control ratio from high-fire to low-fire rate is RV = 101High fire ∆p = pu - pd = 20 mbar Point P1Low fire Point P2 Qmin = 26 m3h at ∆p = 20 mbar RV = Qmax Qmin = 1151

Point P1 and point P2 must be within the working range of a unit size We recommend that you select the smallest size to achieve the best control properties

5 1 1 Calculate VAD

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 25

∆p [i

nch

WC]

Qn [SCFH]100 400 600 4000 60001000 200020 30 40 50 200 3006015 80

1

08

1

2

3

4

56

8

10

20

30

40

5060

80

100

200

∆p [m

bar]

5

8

3

20

10

30

40

80

60

300

400

50

04 06 1 2 3 4 5 808 10 20 30 402

03 60 100 200

100

200

500

1

3

2

04 06 08 1 2 3 4 5 6 8 10 20 30 40

04 06 08 1 2 3 4 5 6 8 10

200

80 10020 3003

03Qn [m3h]

02

50 60 80 100

40 50 60

= pd min lt 5 mbar

VAG

VxH

VAV

115

BVA

GV

xHV

AV 12

0A

VAG

VxH

VAV

125

A

P1

P2

VAG

VxH

VAV

240

AVA

GV

xHV

AV 3

50A

= natural gas (ρ = 080 kgm3) = propane (ρ = 201 kgm3) = air (ρ = 129 kgm3)

The characteristic flow rate curves have been meas-ured with the specified flanges and a fitted strainer If two or more valves are combined the pressure loss of each additional valve drops by approx 5

5 2 Selection example for VAG VAH VRH VAV Natural gas Flow rate Qmax = 30 m3h Inlet pressure pu = 80 mbar Outlet pressure pd max VAG = 60 mbarThe desired control ratio from high-fire to low-fire rate is RV = 101High fire ∆p = pu - pd max = 20 mbar Point P1Low fire pd min = pd max RV2 = 06 mbar Qmin = Qmax RV = 3 m3h ∆p = pu - pd min = 794 mbar Point P2 select VAG 120APoint P1 and point P2 must be within the working range of a unit size We recommend that you select the smallest size to achieve the best control properties

metric imperial

Enter densityFlow rate Qn

Inlet pressure pu

Outlet pressure pd

Product RV v

5 2 1 Calculate VAG VxH VAV

Pressure loss ∆p

∆pmin

Flow rate

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 26

∆p [i

nch

WC]

Qn [SCFH]100 400 600 4000 60001000 200020 30 40 50 200 3006015 80

1

08

1

2

3

4

56

8

10

20

30

40

5060

80

100

200

∆p [m

bar]

5

8

3

20

10

30

40

80

60

300

400

50

04 06 2 3 4 5 808 10 20 30 402

03 60 100 200

100

200

500

1

3

2

04 06 08 1 2 3 4 5 6 8 10 20 30 40

04 06 08 1 2 3 4 5 6 8 10

200

80 10020 3003

03Qn [m3h]

02

50 60 80 100

40 50 60

VAG

115

N

P1VAG

125

N

VAG

120

N

VAG

240

NP2

VAG

350

N

= natural gas (ρ = 080 kgm3) = propane (ρ = 201 kgm3) = air (ρ = 129 kgm3)

The characteristic flow rate curves have been meas-ured with the specified flanges and a fitted strainer If two or more valves are combined the pressure loss of each additional valve drops by approx 5

5 3 Selection example for zero governor VAG NNatural gas Flow rate Qmax = 30 m3h Inlet pressure pu = 20 mbar Outlet pressure pd = 0 mbar (atmospheric pressure)The desired control ratio from high-fire to low-fire rate is RV = 101High fire ∆p = pu - pd max = 20 mbar Point P1Low fire Point P2 Qmin = 24 m3h at ∆p = 20 mbar RV = Qmax Qmin = 1231Point P1 and point P2 must be within the working range of a unit size We recommend that you select the smallest size to achieve the best control properties

metric imperial

Enter densityFlow rate Qn

Inlet pressure pu

Outlet pressure pd

Product RV

5 3 1 Calculate VAG N

Pressure loss ∆p

∆pmin

Flow rate

v

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 27

6 Selection6 1 Selection table for pressure regulator with solenoid valve VAD

Accessories right Accessories left

Type1) T R N F N K P Q Y W S2) G2) R2) L2) M20

cab

le g

land

Plug

with

soc

ket

Plug

with

out s

ocke

t

-25-50 -100 A B Scre

w p

lug

Pres

sure

test

poi

nt

DG

17V

C 3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

Scre

w p

lug

Pres

sure

test

poi

nt

DG

17V

C 3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

VAD 115

VAD 120

VAD 125

VAD 240

VAD 350

= standard = available1) The following nominal inlet fl ange diameters are also available size 1 with nominal diameter DN 10 size 2 with nominal diameters DN 25 DN 32 and DN 50 size 3 with nominal diameters DN 40 and DN 652) Position indicator and bypasspilot gas valve cannot be fi tted together on the same side3) Specify the test point for inlet pressure pu or outlet pressure pdHelp for selecting the pressure regulator VAD can be found on the ProFi DVD wwwkromschroedercom Products DVD Product fi nder ldquoProFirdquo

Order exampleVAD 240RNW-100A

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 28

Selection

6 2 Type code for VADCode DescriptionVAD Pressure regulator with solenoid valve1 ndash 3 SizeT T-product10 ndash 65 Nominal inlet and outlet diameterRNF

Rp internal threadNPT internal thread

ISO fl angeN Quick opening quick closingKPQYW

Mains voltage 24 V DCMains voltage 100 V AC 5060 HzMains voltage 120 V AC 5060 HzMains voltage 200 V AC 5060 HzMains voltage 230 V AC 5060 Hz

SG

Position indicator with visual indicatorPosition indicator for 24 V with visual indicator

RL

Viewed from the right (in the direction of fl ow)Viewed from the left (in the direction of fl ow)

-25-50-100

Outlet pressure pd 25 ndash 25 mbar20 ndash 50 mbar

35 ndash 100 mbarAB

Standard valve seatReduced valve seat

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 29

Selection

6 3 Selection table for airgas ratio control with solenoid valve VAG flow rate regulators VAH VRH

Type1) T R N F N K P Q Y W S2) G2) R2) L2) M20

cab

le g

land

Plug

with

soc

ket

Plug

with

out s

ocke

t

A B E K A N Scre

w p

lug

Pres

sure

test

poi

ntD

G 1

7VC

3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

Scre

w p

lug

Pres

sure

test

poi

ntD

G 1

7VC

3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

VAG 115 VAG 120 VAG 125 VAG 240 VAG 350

VAH 115 VAH 120 VAH 125 VAH 240 VAH 350

VRH 115 VRH 120 VRH 125 VRH 240 VRH 350

= standard = available1) The following nominal inlet fl ange diameters are also available size 1 with nominal diameter DN 10 size 2 with nominal di-

ameters DN 25 DN 32 and DN 50 size 3 with nominal diameters DN 40 and DN 652) Position indicator and bypasspilot gas valve cannot be fi tted together on the same side3) Specify the test point for inlet pressure pu or outlet pressure pdHelp for selecting the regulators can be found on the ProFi DVD wwwkromschroedercom Products DVD Product fi nder ldquoProFirdquo

Order exampleVAG 240RNWAE

Accessories right Accessories left

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 30

Selection

6 4 Type code for VAG VAH VRHCode DescriptionVAGVAHVRH

Airgas ratio control with solenoid valveFlow rate regulator with solenoid valve

Flow rate regulator1 ndash 3 SizeT T-product15 ndash 50 Nominal inlet and outlet diameterRNF

Rp internal threadNPT internal thread

ISO fl angeN1) Quick opening quick closingK1)

P1)

Q1)

Y1)

W1)

Mains voltage 24 V DCMains voltage 100 V AC 5060 HzMains voltage 120 V AC 5060 HzMains voltage 200 V AC 5060 HzMains voltage 230 V AC 5060 Hz

S1)

G1)Position indicator with visual indicator

Position indicator for 24 V with visual indicatorRL

Viewed from the right (in the direction of fl ow)Viewed from the left (in the direction of fl ow)

AB

Standard valve seatReduced valve seat

EKAN

Connection kit for air control pressure psaVAG VAH VRH compression fi tting

VAG plastic hose couplingVAG VAH VRH NPT 18 adapter

VAG zero governor1) Only available for VAG VAV VAH

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 31

6 5 Selection table for variable airgas ratio control with solenoid valve VAVAccessories right Accessories left

Type1) T R N F N K P Q Y W S2) G2) R2) L2) M20

cab

le g

land

Plug

with

soc

ket

Plug

with

out s

ocke

t

A B E K A Scre

w p

lug

Pres

sure

test

poi

ntD

G 1

7VC

3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

Scre

w p

lug

Pres

sure

test

poi

ntD

G 1

7VC

3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

VAV 115

VAV 120

VAV 125

VAV 240

VAV 350

= standard = available1) The following nominal inlet fl ange diameters are also available size 1 with nominal diameter DN 10 size 2 with nominal diameters DN 25 DN 32 and DN 50 size 3 with nominal diameters DN 40 and DN 652) Position indicator and bypasspilot gas valve cannot be fi tted together on the same side3) Specify the test point for inlet pressure pu or outlet pressure pdHelp for selecting the variable airgas ratio control VAV can be found on the ProFi DVD wwwkromschroedercom

Products DVD Product fi nder ldquoProFirdquo

Order exampleVAV 240RNWAK

Selection

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 32

Selection

6 6 Type code for VAVCode DescriptionVAV Variable airgas ratio control with solenoid valve1 ndash 3 SizeT T-product15 ndash 50 Nominal inlet and outlet diameterRNF

Rp internal threadNPT internal thread

ISO fl angeN Quick opening quick closingKPQYW

Mains voltage 24 V DCMains voltage 100 V AC 5060 HzMains voltage 120 V AC 5060 HzMains voltage 200 V AC 5060 HzMains voltage 230 V AC 5060 Hz

SG

Position indicator with visual indicatorPosition indicator for 24 V with visual indicator

RL

Viewed from the right (in the direction of fl ow)Viewed from the left (in the direction of fl ow)

AB

Standard valve seatReduced valve seat

EKA

Connection kit for air control pressure psa and combus-tion chamber control pressure psc

compression fi ttingplastic hose coupling

NPT 18 adapter

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 33

Selection

6 7 AccessoriesModularly configurable withndash Screw plugsndash Pressure test pointsndash Pressure switch DGVC for inlet

andor outlet pressurendash Tightness control TCndash Bypasspilot gas valve VBY 8 for

size 1ndash Bypasspilot gas valve VAS 1For further information see page 37 (Accessories)

Position indicator

Plug with socket

Plug

Screwplugs

Pressuretest points

Pressure switch DGC Tightness

control TC

Bypasspilot gas valve VBY 8 for size 1

Bypasspilot gas valve VAS 1

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 34

7 Project planning informationDo not store or install the unit in the open airThe inlet pressure pu and the outlet pressure pd can be meas-ured on both sides of the valve body To increase the control accuracy an external impulse line can be connected instead of the pressure test point pd

VAD

pu

pd

(psa)

VAGpd

pu

psa

psa

VAD measurement point for the gas outlet pressure pd on the regulator body A combustion chamber control line (psc) can be connected to connection psa for maintaining a constant burner capacityVAG additional measurement point for the air control pressure psa on the regulator body

VAV

psapsc

pu

pd

VAH VRH

pu

pd-

pdpsa-

psa

VAV measurement point for the outlet pressure pd on the regulator bodyVAH additional measurement points for the outlet pressure pd- and the air control pressure psapsa- on the regulator body

7 1 Installation

GFK

VAGVAH

GFKVAD

Sealing material and thread cuttings must not be allowed to get into the valve housing Install a filter upstream of every system

gt20 mmgt0 79

The unit must not be in contact with masonry Minimum clear-ance 20 mm (079 inches)Ensure that there is sufficient space for installation and ad-justment

le +100 degCle +212 degF

The solenoid body heats up during operation ndash depending on ambient temperature (max 60degC140degF) and intrinsic heating (approx 40degC104degF)

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 35

In the case of double solenoid valves the position of the con-nection box can only be changed by removing the actuator and reinstalling it offset by 90deg or 180deg

If more than three valVario controls are installed in line the controls must be supported

The seals in some gas compression fittings are approved for temperatures of up to 70degC (158degF) This temperature limit will not be exceeded if the flow through the pipe is at least 1 msup3h (3531 SCFH) of gas and the maximum ambient temperature is 50degC (122degF)

7 1 1 Installation position

pu ge 80 mbar(80 hPa32 WC)

VAD VAG VAH VRH VAV

In humid environments black solenoid actuator in the vertical upright position only

VAD VAG VAH VRH black solenoid actuator in the vertical upright position or tilted up to the horizontal not upside downVAG VAH horizontal position only if pu ge 80 mbar (32 WC))VAV installation in the vertical position only black solenoid actuator in the vertical upright positionTo ensure that the airgas ratio control VAG the flow rate regulator VAH VRH or the variable airgas ratio control VAV can react quickly when the load is changed the impulse line for the air control pressure psa and for VAV the impulse line for the combustion chamber control pressure psc should be kept as short as possible The tube internal diameter for the impulse line must always be ge 39 mm (015)

VAH VRHIt is not permitted to install a gas solenoid valve VAS down-stream of flow rate regulator VAH VRH and upstream of fine-adjusting valve VMV The VAS would no longer be able to perform its function as a second safety valve if installed in the above-mentioned position

M

VMV

VAH

VASVAS

pd-

psa-psa

VMV

VAH pd-

psa-psa

The measuring orifice in the air line for impulse lines psa and psa- must always be installed downstream of the air control valve

Project planning information gt Installation

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 36

VAVThe impulse line for the combustion chamber control pres-sure psc must be fitted so that no condensation can enter the pressure regulator but rather flows back into the combustion chamber

7 2 Setting the low-fire rate on VAG VAH VRH VAV

-10 +05-05

ndash

+1

-15

mbar

+15

06

1 152

3

N V

+ +ndash

+30 -15+15

ndash

-3

+5

mbar

-5

N

+

VAG VAH VRH VAV

If the burner operates at low-fire rate the gasair mixture can be changed using the parallel shift of the characteristic curve by turning the adjusting screw ldquoNrdquoAdjusting range at low fire VAG VAH VRH -5 to +5 mbar (-195 to +195 WC) VAV -15 to +15 mbar (-06 to +06 WC)

7 3 Setting the high-fire rate on VAVTo set the high-fire rate the transmission ratio is changed us-ing the adjusting screw ldquoVrdquo until the required flue gas values are achievedTransmission ratio V = pdpsa = 061 to 31The settings N and V can influence each other and must be repeated if necessary

+N+V

-V

-N

VAV

psa [mbar]

p d [m

bar]

7 3 1 CalculationWith no connection to the combustion chamber control pres-sure psc pd = V times psa + NWith connection to the combustion chamber control pressure psc (pd - psc) = V times (psa - psc) + N

Project planning information

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 37

pu pd

21579

4836

085310

189

142

8 Accessories8 1 Gas pressure switch DG VC for VAx VRHType Adjusting range [mbar]DG 17VC 2 to 17DG 40VC 5 to 40DG 110VC 30 to 110DG 300VC 100 to 300

Scope of delivery 1 times pressure switch for gas 2 times retaining screws 2 times sealing rings

8 2 Gas pressure switch DG VCT for VAx T VRH TType Adjusting range [WC]DG 17VCT 08 to 68DG 40VCT 2 to 16DG 110VCT 12 to 44DG 300VCT 40 to 120

Scope of delivery 1 times gas pressure switch with AWG 18 connection wires 2 times retaining screws 2 times sealing ringsMonitoring the inlet pressure pu the electrical plug of the pressure switch for gas points towards the inlet flangeMonitoring the outlet pressure pd the electrical plug of the pressure switch for gas points towards the outlet flange

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 38

A BC

D

FE

ACD

F

B

E

8 3 Bypass valvepilot gas valve VAS 18 3 1 VAS 1 attached to VADVAGVAHVAV 1Scope of delivery A 1 times bypasspilot gas valve VAS 1 B 4 times O-rings C 4 times double nuts D 4 times connection parts E 1 times mounting aidBypass valve VAS 1 F 2 times connection pipes if the bypass valve has a blind flange

at the outlet sidePilot gas valve VAS 1 F 1 times connection pipe 1 times sealing plug if the pilot gas valve

has a threaded flange at the outlet side

Accessories

8 3 2 VAS 1 attached to VADVAGVAHVAV 2 VADVAGVAHVAV 3Scope of delivery A 1 times bypasspilot gas valve VAS 1 B 4 times O-rings C 4 times spacer sleeves D 4 times connection parts E 1 times mounting aidBypass valve VAS 1 F 2 times connection pipes if the bypass valve has a blind flange

at the outlet sidePilot gas valve VAS 1 F 1 times connection pipe 1 times sealing plug if the pilot gas valve

has a threaded flange at the outlet side

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 39

2

3

456

810

20

30

405060

80100

∆p [m

bar]

005 01 02 03 05 08 1 2 3 4 51

3

2

Qn [m3h]

1

01

02

03

0405

08

003

002

6 8 10

005 01 02 03 05 08 1 2 3 4 5003 6 8 10

20

005 01 02 03 05 08 1 2 3 4 5003 6 8 10 20

30

∆p [i

nch

WC]

1

2

3

456

810

20

30

40

04

004

006

00801

02

03

0506

08

Qn [SCFH]10 40 60 100 200 3001 500 10002 3 4 5

120 306 8

21 3 4 5 6 7 8 910

8 3 3 Flow rate

The characteristic flow rate curves have been measured for bypass valve VAS 1 with connection pipe diameter 1 to 10 mm (004 to 04) and for the pilot gas valve with 10 mm (04) connection pipe

Bypass valve connection pipe diameter [mm]

Pilo

t gas

val

ve 1

0 m

m (0

4)

conn

ectio

n pi

pe d

iam

eter

Accessories gt Bypass valvepilot gas valve VAS 1

= natural gas (ρ = 080 kgm3) = propane (ρ = 201 kgm3) = air (ρ = 129 kgm3)

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 40

Accessories

8 4 Bypass valvepilot gas valve VBY 8 for VADVAGVAHVAV 1

B

C

AVBY 8

VAx 1

55

(217)40(157)

70 (276)

80(315)

Rp frac14(pilot gas valve)

For mounting on VAD VAG VAH VAV 1 and double solenoid valve VCD VCG VCH VCV 1

8 4 1 Scope of delivery VBY 8I as bypass valveA 1 times bypass valve VBY 8IB 2 times retaining screws with 4 times O-rings both retaining screws

have a bypass orificeC 1 times grease for o-rings

8 4 2 Scope of delivery VBY 8R as pilot gas valveA 1 times pilot gas valve VBY 8RB 2 times retaining screws with 5 x O-rings one retaining screw

has a bypass orifice (2 x O-rings) the other does not (3 x O-rings)

C 1 times grease for O-rings

8 4 3 SelectionType I R W Q K 6L -R -L E B D 05

VBY 8

Order exampleVBY 8RW6L-LED

8 4 4 Type codeCode DescriptionVBY Gas solenoid valve8 Nominal sizeIR

For internal gas pick-up as bypass valveFor external gas pick-up as pilot gas valve

KQW

Mains voltage 24 V DC Mains voltage 120 V AC 5060 HzMains voltage 230 V AC 5060 Hz

6L Electrical connection via plug and socket with LED-R-L

Attachment side of main valve right-hand sideAttachment side of main valve left-hand side

EB

Attached to the VAxEnclosed (separate packing unit)

05D

Nozzle diameter = 05 mm (002)Flow adjustment

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 41

2

01

02

03

05

081

3

456

810

20

30

405060

80100

∆p [m

bar]

1

3

201 02 03 05 1 2 3001 003 4

Qn [m3h]

02 03 05 1 2

01 02 05

002 006

002

002 006 1

0010006 005 01

001

0003

0006 2 3

VBY 8DVBY 805

∆p [i

nch

WC]

1

2

3

456

810

20

30

40

040506

08

1

Qn [SCFH]10 40 60 1005 2081 2 30402

01

02

03

004005006

008

Adjusting range

8 4 5 Flow rateVBY 8 D

+

-

The flow rate can be set by turning the flow rate restrictor (4 mm016 Allen screw) frac14 of a turn Flow rate 10 to 100

VBY 8 05The flow is routed through a 05 mm (002) nozzle and thus has a fixed characteristic flow rate curve Adjustment is not possible

8 4 6 Technical dataInlet pressure pu max 500 mbar (7 psig)Ambient temperature 0 to +60degC (32 to 140degF) no condensation permittedStorage temperature 0 to +40degC (32 to 104degF) no condensation permittedPower consumption 24 V = 8 W 120 V = 8 W 230 V = 95 WEnclosure IP 54

Accessories gt Bypass valvepilot gas valve VBY 8 for VADVAGVAHVAV 1

= natural gas (ρ = 080 kgm3) = propane (ρ = 201 kgm3) = air (ρ = 129 kgm3)

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 42

TC 116VB C

56(22)

49(193)

27(106)

A

A

VCx 1 VCx 2VCx 3

8 5 Tightness control TC 116Vfor VAx 1 ndash 3An adapter plate is required to attach the tightness control to the right- or left-hand side of the pressure regulator with gas solenoid valveScope of delivery A 1 times adapter plate B 2 times O-rings C 2 times retaining screwsFor attachment to left-hand side Order No 74922391 right-hand side Order No 74921995

8 6 Pressure test pointsTest points to check the inlet pressure pu and outlet pressure pdScope of delivery 1 x pressure test points with 1 x profiled sealing rings Order No 74923390

8 7 Cable gland setWhen wiring a double solenoid valve with pressure regula-tor VCx the connection boxes are to be connected using a cable gland setThe cable gland set can only be used if the connection boxes are at the same height and on the same side and if both valves are equipped either with or without a proof of closure switchVA 1 Order No 74921985 VA 2 Order No 74921986 VA 3 Order No 74921987

Accessories

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 43

A B

D

C

Accessories

8 9 Differential pressure orifice

Size PipeDN

Differential pressure orifi cewith outlet dia

1 15 17 mm 0671 20 25 mm 0981 25 30 mm 1182 40 46 mm 1813 50 58 mm 228

If pressure regulator VADVAGVAV 1 is retrofitted upstream of gas solenoid valve VAS 1 a DN 25 differential pressure orifice with outlet opening d = 30 mm (118) must be inserted at the outlet of the pressure regulatorIn the case of pressure regulator VAx 115 or VAx 120 the DN 25 differential pressure orifice must be ordered separately and retrofitted Order No 74922240

8 8 Seal set VA 1 ndash 3VA 1 Order No 74921988 VA 2 Order No 74921989 VA 3 Order No 74921990Scope of deliveryA 1 times double block seal B 2 times O-rings (flange) C 2 times O-rings (pressure switch) for pressure test pointscrew plug D 2 times sealing rings (flat sealing) and 2 times profiled sealing rings

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 44

BA

C

pd-

8 11 Attachment blockFor locked installation of pressure gauge and other acces-soriesScope of delivery A 1 times attachment block B 2 times self-tapping screws for installation C 2 times O-rings

Accessories

8 10 Retaining frameIn the event that a pressure regulator VAx is installed at a later point upstream of a gas solenoid valve VAS a measur-ing orifice VMO or a fine-adjusting valve VMV the retaining frame must be fitted at the inlet of the second device in order to fasten the differential pressure orifice at the regulator outlet Order the retaining frame separatelyRetaining frame for Size 1 Order No 74923029 Size 2 Order No 74923030 Size 3 Order No 74923031

8 12 Gas control lineFine-adjusting valve VMV can be installed on the flow rate regulator VAH for fine adjustment of the gas flow rateThe gas control line for gas outlet pressure pd- is available with 2 18 compression fittingsSize 1 Order No 74924458 Size 2 Order No 74924459

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 45

8 13 Measuring orifice VMOThe measuring orifice VMO is designed to reduce the gas and air flow rates and is installed downstream of the valVario control The measuring orifice is available with Rp internal thread (NPT internal thread) or flange to ISO 7005See wwwdocuthekcom Elster Kromschroumlder Krom-schroumlder LBE Products 03 Valves and butterfly valves valVario accessories Type of document Technical Informa-tion VMO

Accessories

8 14 Filter module VMFUsing the filter module VMF the gas flow upstream of the gas solenoid valve VAS and the airgas ratio control is cleaned The filter module is available with Rp internal thread (NPT internal thread) or flange to ISO 7005 and can also be supplied with fitted pressure switch as an optionSee wwwdocuthekcom Elster Kromschroumlder Krom-schroumlder LBE Products 03 Valves and butterfly valves valVario accessories Type of document Technical Informa-tion VMF

8 15 Fine-adjusting valve VMVThe flow rate is set using the fine-adjusting valve VMV The fine-adjusting valve is available with Rp internal thread (NPT internal thread) or flange to ISO 7005See wwwdocuthekcom Elster Kromschroumlder Krom-schroumlder LBE Products 03 Valves and butterfly valves valVario accessories Type of document Technical Infor-mation VMV

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 46

9 Technical dataGas types natural gas LPG (gaseous) biologically produced methane (max 01 -by-vol H2S) or clean air other gases on request The gas must be clean and dry in all temperature conditions and must not contain condensateCE and FM approved UL listed max inlet pressure pu 10 ndash 500 mbar (4 ndash 200 WC) FM approved (230 V AC 120 V AC 24 V DC) non opera-tional pressure 700 mbar (10 psig)ANSICSA approved (230 V AC 120 V AC 24 V DC) up to 350 mbar (5 psig)Opening time of the solenoid valve quick opening le 05 s Closing time quick closing lt 1 sMedium and ambient temperatures -20 to +60degC (-4 to +140degF) no condensation permittedStorage temperature -20 to +40degC (-4 to +104degF)Enclosure IP 65Valve housing aluminium valve seal NBRConnection flanges with internal thread Rp to ISO 7-1 NPT to ANSIASMESafety valve Class A to EN 161 Factory Mutual Research Class 7400 Process Control Valves (230 V AC 120 V AC 24 V DC) ANSI Z2121 and CSA 65 ANSI Z2118 and CSA 63Control class A to EN 88-1Control range up to 101

Mains voltage 230 V AC +10-15 5060 Hz 200 V AC +10-15 5060 Hz 120 V AC +10-15 5060 Hz 100 V AC +10-15 5060 Hz 24 V DC plusmn20Duty cycle 100Power factor of the solenoid coil cos φ = 09Power consumption

Type Voltage Power

VAx 1

24 V DC 25 W ndash100 V AC 25 W (26 VA)120 V AC 25 W (26 VA)200 V AC 25 W (26 VA)230 V AC 25 W (26 VA)

VAx 2 VAx 3

24 V DC 36 W ndash100 V AC 36 W (40 VA)120 V AC 40 W (44 VA)200 V AC 40 W (44 VA)230 V AC 40 W (44 VA)

VBY24 V DC 8 W ndash

120 V AC 8 W ndash230 V AC 95 W ndash

Cable gland M20 times 15Electrical connection cable with max 25 mm2 (AWG 12) or plug with socket to EN 175301-803

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 47

Position indicator contact rating

Type Voltage Min current(resistive load)

Max current(resistive load)

VAxS VCxS 12 ndash 250 V AC 5060 Hz 100 mA 3 AVAxG VCxG 12 ndash 30 V DC 2 mA 01 A

Position indicator switching frequency max 5 times per minute

Switching current [A]

Switching cyclescos φ = 1 cos φ = 06

01 500000 50000005 300000 250000

1 200000 1000003 100000 ndash

Limited to max 200000 cycles for heating systems

9 1 VADOutlet pressure pd VAD-25 25 ndash 25 mbar (1 ndash 10 WC) VAD-50 20 ndash 50 mbar (8 ndash 20 WC) VAD-100 35 ndash 100 mbar (14 ndash 40 WC)Combustion chamber control pressure psc (connection psa)

-20 to +20 mbar (-78 to +78 WC)

VAD

pu

pd

(psa)

9 2 VAGOutlet pressure pd 05 ndash 100 mbar (02 ndash 40 WC)Air control pressure psa 05 ndash 100 mbar (02 ndash 40 WC)

Adjusting range at low fire plusmn5 mbar (plusmn2 WC)Transmission ratio of gas to air 11The inlet pressure must always be higher than the air control pressure psa + pressure loss ∆p + 5 mbar (2 WC)

VAGpd

pu

psa

psa

VAGK 1 x 18 coupling for plastic hose (internal dia 39 mm (015) external dia 61 mm (024)) or VAGE 1 x 18 compression fitting for 6 times 1 tube or VAGA 1 x NPT 18 adapter or VAGN zero governor with breathing orifice

9 3 VAH VRHAir control pressure psa 06 ndash 100 mbar (024 ndash 40 WC) Differential air pressure ∆psa (psa - psa-) 06 ndash 50 mbar (024 ndash 197 WC) Differential gas pressure ∆pd (pd - pd-) 06 ndash 50 mbar (024 ndash 197 WC)Transmission ratio of gas to air 11The inlet pressure must always be higher than the differen-tial air pressure ∆psa + pressure loss ∆p + max gas pres-sure on burner + 5 mbar (2 WC)Adjusting range at low fire plusmn5 mbar (plusmn2 WC)

Technical data

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 48

VAHVRH

pd-

pu

psa-

psa

Connection of the air control pressure psaVAHE VRHE 3 x 18 compression fitting for 6 times 1 tube or VAHA VRHA 3 x NPT 18 adapter

9 4 VAVOutlet pressure pd 05 ndash 30 mbar (02 ndash 117 WC)Air control pressure psa 04 ndash 30 mbar (015 ndash 117 WC)Combustion chamber control pressure psc

-20 to +20 mbar (-78 to +78 WC)Min control pressure differential psa - psc 04 mbar (015 WC)Min pressure differential pd - psc 05 mbar (02 WC)Adjusting range at low fire plusmn15 mbar (plusmn06 WC)Transmission ratio of gas to air 061 to 31The inlet pressure pu must always be higher than the air control pressure psa times transmission ratio V + pressure loss ∆p + 15 mbar (06 WC)

pu

pd psapsc

VAV

VAVK 2 x plastic hose couplings (internal dia 39 mm (015) external dia 61 mm (024)) or VAVE 2 x 18 compression fitting for 6 times 1 tube or VAVA 2 x NPT 18 adapter

Technical data

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 49

9 5 Safety-specific characteristic values for VAx 1 ndash 3For SILSuitable for Safety Integrity Level SIL 1 2 3

Diagnostic coverage DC 0

Type of subsystem Type A to EN 61508-2 74312

Operating mode High demand mode pursu-ant to EN 61508-4 3512

For PLSuitable for Performance Level PL a b c d e

Category B 1 2 3 4Common cause failure CCF gt 65Application of essential safety requirements Satisfied

Application of tried-and-tested safety requirements Satisfied

For SIL and PL

B10d value

Operating cyclesVAD VAG VAV VAH 1 10094360VAD VAG VAV VAH 2 8229021VAD VAG VAV VAH 3 6363683

Hardware fault tolerance (1 valve) HFT 0

Hardware fault tolerance (2 valves) HFT 1

Safe failure fraction SFF gt 90Fraction of undetected com-mon cause failures β ge 2

Max service life under operating conditions10 years after date of production plus max 12 year in stor-age prior to first use or once the given number of operating cycles has been reached depending on which is achieved firstThe devices are suitable for single-channel systems (HFT = 0) up to SIL 2PL d and up to SIL 3PL e when two re-dundant valves are installed in a double-channel architecture (HFT = 1) provided that the complete system complies with the requirements of EN 61508ISO 13849

For a glossary of terms see page 53 (Glossary)

Technical data

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 50

nop 1hnop 1a

sB10d

T10d aPFHD (1 VAx) 1h

PFHD (2 VAx) 1h

PFDavg (1 VAx)

PFDavg (2 VAx)

Technical data gt Safety-specific characteristic values for VAx 1 ndash 3

9 5 1 Determining the PFHD value the λD value and the MTTFd value

PFHD = λD = x nop= 1MTTFd

01B10d

PFDavg = x λD x 24 x 365 x T10d 12

Type

Cycle time

suitable for

suitable for

PFHD = Probability of dangerous failure (HDM = high de-mand mode) [1hour]PFDavg = Average probability of dangerous failure on de-mand (LDM = low demand mode)λD = Mean dangerous failure rate [1hour]MTTFd = Mean time to dangerous failure [hours]nop = Demand rate (mean number of annual operations) [1hour]

9 5 2 Calculating the PFHD and PFDavg

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 51

VAD VAG VAH VAV

H1

Rp frac14(NPT frac14)

H2

E

LF

F

H4

H3

B

VAxS VAxF

L2G

G

Technical data

9 6 Dimensions

Type

Connec-tion Dimensions

WeightRpNPT DN

L L2 E F G H1 H2 H3 H4 Bmm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch kg lbs

VAx 115 12 15 75 29 ndash ndash 75 29 15 06 ndash ndash 143 56 82 32 161 63 117 46 97 38 18 40VAH 115 12 15 75 29 ndash ndash 75 29 15 06 ndash ndash 143 56 100 39 161 63 135 53 97 38 2 44VAx 120 34 20 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 82 33 161 63 117 46 97 38 19 42VAH 120 34 20 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 100 39 161 63 135 53 97 38 21 46VAx 125 1 25 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 82 33 161 63 117 46 97 38 19 42VAH 125 1 25 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 100 39 161 63 135 53 97 38 21 46VAx 240 112 40 128 50 200 79 85 33 29 11 66 26 170 67 112 44 191 75 162 64 125 49 44 97VAH 240 112 40 128 50 200 79 85 33 29 11 66 26 170 67 132 52 191 75 182 72 125 49 47 104VAx 350 2 50 155 61 230 91 85 33 36 14 74 29 180 70 135 53 201 79 196 77 160 63 61 134VAH 350 2 50 155 61 230 91 85 33 36 14 74 29 180 70 156 61 201 79 217 85 160 63 64 141

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 52

10 Converting unitssee wwwadlatusorg

11 Maintenance cyclesAt least once per annum at least twice per annum for biologi-cally produced methaneIf the flow rate drops clean the strainer

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 53

12 Glossary12 1 Diagnostic coverage DCMeasure of the effectiveness of diagnostics which may be determined as the ratio between the failure rate of detected dangerous failures and the failure rate of total dangerous failuresNOTE Diagnostic coverage can exist for the whole or parts of a safety-related system For example diagnostic cover-age could exist for sensors andor logic system andor final elements Unit see EN ISO 13849-12008

12 2 Mode of operationHigh demand mode or continuous modeOperating mode where the frequency of demands for opera-tion made on a safety-related system is greater than one per year or greater than twice the proof-test frequencysee EN 61508-42008

12 3 CategoryClassification of the safety-related parts of a control system in respect of their resistance to faults and their subsequent behaviour in the fault condition and which is achieved by the structural arrangement of the parts fault detection andor by their reliability see EN ISO 13849-12008

12 4 Common cause failure CCFFailures of different items resulting from a single event where these failures are not consequences of each othersee EN ISO 13849-12008

12 5 Fraction of undetected common cause failures β Fraction of undetected failures of redundant components due to a single event whereby these failures are not based on mutual causesNOTE β is expressed as a fraction in the equations and as a percentage elsewheresee EN 61508-62010

12 6 B10d valueMean number of cycles until 10 of the components fail dan-gerouslysee EN ISO 13849-12008

12 7 T10d valueMean time until 10 of the components fail dangerouslysee EN ISO 13849-12008

12 8 Hardware fault tolerance HFTA hardware fault tolerance of N means that N + 1 is the mini-mum number of faults that could cause a loss of the safety functionsee IEC 61508-22010

12 9 Mean dangerous failure rate λD Mean rate of dangerous failures during operation time (T10d) Unit 1hsee EN ISO 13849-12008

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 54

12 10 Safe failure fraction SFFFraction of safe failures related to all failures which are as-sumed to appearsee EN 13611A22011

12 11 Probability of dangerous failure PFHD Value describing the likelihood of dangerous failure per hour of a component for high demand mode or continuous mode Unit 1hsee EN 13611A22011

12 12 Mean time to dangerous failure MTTFd Expectation of the mean time to dangerous failuresee EN ISO 13849-12008

12 13 Demand rate nop Mean number of annual operationssee EN ISO 13849-12008

12 14 Average probability of dangerous failure on demand PFDavg (LDM = 1 ndash 10 switching cyclesyear)Average probability of a dangerous failure of the safety function on demand (LDM = low demand mode)see EN 61508-6

Glossary

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415

Finally we are offering you the opportunity to assess this ldquoTechnical Information (TI)rdquo and to give us your opinion so that we can improve our documents further and suit them to your needs

ClarityFound information quicklySearched for a long timeDidnrsquot find informationWhat is missing

ComprehensionCoherentToo complicatedNo answer

ScopeToo littleSufficientToo wideNo answer

No answer

NavigationI can find my way aroundI got ldquolostrdquoNo answer

UseTo get to know the productTo choose a productPlanningTo look for information

My scope of functionsTechnical departmentSalesNo answer

Remarks

(Adobe Reader 7 or higher required) wwwadobecom

Elster GmbH Postfach 2809 middot 49018 Osnabruumlck Strotheweg 1 middot 49504 Lotte (Buumlren) GermanyT +49 541 1214-0 F +49 541 1214-370 infokromschroedercomwwwkromschroedercom

The current addresses of our international agents are available on the Internetwwwkromschroederdeindexphpid=718ampL=1

We reserve the right to make technical modifications in the interests of progressCopyright copy 2015 Elster GmbH All rights reserved

Contact

Feedback

0325

0530

  • Pressure regulators with solenoid valve VAD VAG VAV VAH
  • Flow rate regulator VRH
  • Pressure regulators with double solenoid valve VCD VCG VCV VCH
  • Contents
  • 1 Application
    • 11 Examples of application
      • 111 Constant pressure control
      • 112 Constant pressure control with two gas solenoid valves
      • 113 Constant pressure control with max pressure switch
      • 114 Constant pressure control with non-controlled pilot gas outlet
      • 115 Modulating control
      • 116 Modulating control with two gas solenoid valves
      • 117 Modulating control with two gas solenoid valves and inlet pressure switch
      • 118 HighLow control
      • 119 Zero pressure control
      • 1110 Staged flow rate control
      • 1111 Continuous or staged flow rate control
      • 1112 Modulating control with variable airgas ratio control with gas solenoid valve
      • 1113 Modulating control in residential heat generation
          • 2 Certification
          • 3 Function
            • 31 VAD VAG VAH VRH VAV
              • 311 Pressure regulator for gas VAD
              • 312 Airgas ratio control VAG
              • 313 Flow rate regulators VAH VRH
              • 314 Variable airgas ratio control VAV
              • 315 Pressure regulator with gas solenoid valve VAxS position indicator with visual indicator
                • 32 Animation
                • 33 Connection diagram
                  • 331 VAx with M20 cable gland
                  • 332 VAx with plug
                  • 333 VAS with VADVAGVAHVAV with M20 cable gland
                  • 334 VAS with VADVAGVAHVAV with plug
                      • 4 Replacement possibilities for MODULINE pressure regulators with gas solenoid valve
                        • 41 GVS GVI GVIB GVR and GVRH are to be replaced by VAD VAG VAG+VAS VAH and VAV
                          • 5 Flow rate
                            • 51 Selection example for VAD
                              • 511 Calculate VAD
                                • 52 Selection example for VAG VAH VRH VAV
                                  • 521 CalculateVAG VxHVAV
                                    • 53 Selection example for zero governor VAGN
                                      • 531 Calculate VAGN
                                          • 6 Selection
                                            • 61 Selection table for pressure regulator with solenoid valve VAD
                                            • 62 Type code for VAD
                                            • 63 Selection table for airgas ratio control with solenoid valve VAG flow rate regulators VAH VRH
                                            • 64 Type code for VAG VAH VRH
                                            • 65 Selection table for variable airgas ratio control with solenoid valve VAV
                                            • 66 Type code for VAV
                                            • 67 Accessories
                                              • 7 Project planning information
                                                • 71 Installation
                                                  • 711 Installation position
                                                    • 72 Setting the low-fire rate on VAG VAH VRH VAV
                                                    • 73 Setting the high-fire rate on VAV
                                                      • 731 Calculation
                                                          • 8 Accessories
                                                            • 81 Gas pressure switch DGVC for VAx VRH
                                                            • 82 Gas pressure switch DGVCT for VAxT VRHT
                                                            • 83 Bypass valvepilot gas valve VAS 1
                                                              • 831 VAS 1 attached to VADVAGVAHVAV 1
                                                              • 832 VAS 1 attached to VADVAGVAHVAV 2 VADVAGVAHVAV 3
                                                              • 833 Flow rate
                                                                • 84 Bypass valvepilot gas valve VBY 8 for VADVAGVAHVAV 1
                                                                  • 841 Scope of delivery VBY 8I as bypass valve
                                                                  • 842 Scope of delivery VBY 8R as pilot gas valve
                                                                  • 843 Selection
                                                                  • 844 Type code
                                                                  • 845 Flow rate
                                                                  • 846 Technical data
                                                                    • 85 Tightness control TC 116V
                                                                    • 86 Pressure test points
                                                                    • 87 Cable gland set
                                                                    • 88 Seal set VA 1thinspndashthinsp3
                                                                    • 89 Differential pressure orifice
                                                                    • 810 Retaining frame
                                                                    • 811 Attachment block
                                                                    • 812 Gas control line
                                                                    • 813 Measuring orifice VMO
                                                                    • 814 Filter module VMF
                                                                    • 815 Fine-adjusting valve VMV
                                                                      • 9 Technical data
                                                                        • 91 VAD
                                                                        • 92 VAG
                                                                        • 93 VAH VRH
                                                                        • 94 VAV
                                                                        • 95 Safety-specific characteristic values for VAx 1thinspndashthinsp3
                                                                          • 951 Determining the PFHD value the λD value and the MTTFd value
                                                                          • 952 Calculating the PFHD and PFDavg
                                                                            • 96 Dimensions
                                                                              • 10 Converting units
                                                                              • 11 Maintenance cycles
                                                                              • 12 Glossary
                                                                                • 121 Diagnostic coverage DC
                                                                                • 122 Mode of operation
                                                                                • 123 Category
                                                                                • 124 Common cause failure CCF
                                                                                • 125 Fraction of undetected common cause failures β
                                                                                • 126 B10d value
                                                                                • 127 T10d value
                                                                                • 128 Hardware fault tolerance HFT
                                                                                • 129 Mean dangerous failure rate λD
                                                                                • 1210 Safe failure fraction SFF
                                                                                • 1211 Probability of dangerous failure PFHD
                                                                                • 1212 Mean time to dangerous failure MTTFd
                                                                                • 1213 Demand rate nop
                                                                                • 1214 Average probability of dangerous failure on demand PFDavg
                                                                                  • Feedback
                                                                                  • Contact
                                                                                      1. naechste_Seite 24
                                                                                      2. naechste Seite 18
                                                                                      3. naechste Seite 6
                                                                                      4. naechste Seite 16
                                                                                      5. naechste Seite 14
                                                                                      6. naechste Seite 25
                                                                                      7. naechste_Seite 11
                                                                                      8. naechste_Seite 17
                                                                                      9. fbArbeitspunkt_Min Ja
                                                                                      10. fbArbeitspunkt Ja
                                                                                      11. ftProgramm Standard-Programm
                                                                                      12. fz_kv
                                                                                      13. fz_pe 80
                                                                                      14. fz_pG 60
                                                                                      15. fzDelta_p_Soll 20
                                                                                      16. ftEinheit_Druck mbar
                                                                                      17. fatTyp [115]
                                                                                      18. fbArbeitspunkt_Min_2 Ja
                                                                                      19. fbArbeitspunkt_2 Ja
                                                                                      20. ftRegler_Typ VAG
                                                                                      21. ftProgramm_2 Standard-Programm
                                                                                      22. fz_kv_2
                                                                                      23. fatMedium [08]
                                                                                      24. fzDichte 08
                                                                                      25. ftEinheit_Dichte kgm3
                                                                                      26. fzV_Norm 30
                                                                                      27. ftEinheit_Volstrom m3h
                                                                                      28. fz_pe_2 80
                                                                                      29. fz_pG_2 60
                                                                                      30. fzDelta_p_Soll_2 20
                                                                                      31. ftEinheit_Druck2 [mbar]
                                                                                      32. ftEinheit_Geschw [ms]
                                                                                      33. fatTyp_2 [10954451150103322]
                                                                                      34. fbArbeitspunkt_Min_3 Ja
                                                                                      35. fbArbeitspunkt_3 Ja
                                                                                      36. ftProgramm_3 Standard-Programm
                                                                                      37. fz_kv_3
                                                                                      38. fz_pe_3 20
                                                                                      39. fz_pG_3 0
                                                                                      40. fzDelta_p_Soll_3 20
                                                                                      41. fatTyp_3 [123]
                                                                                      42. fatSchaltleistung [6363683]
                                                                                      43. fz_nop_Stunde 1
                                                                                      44. fz_nop_Jahr 8760
                                                                                      45. fzZyklus 3600
                                                                                      46. fzB10d 6363683
                                                                                      47. fzT10d 10
                                                                                      48. fzPFHd_1V 15714170551864384e-8
                                                                                      49. fzPFDavg_1V
                                                                                      50. ftGeeignet_1V PL d SIL 2
                                                                                      51. fzPFHd_2V 33505832253532625e-10
                                                                                      52. fzPFDavg_2V
                                                                                      53. ftGeeignet_2V PL e SIL 3
                                                                                      54. ftUebersicht Off
                                                                                      55. ftVerstaendlichkeit Off
                                                                                      56. ftFehlende_Info
                                                                                      57. ftUmfang Off
                                                                                      58. ftVerwendung_1 Off
                                                                                      59. ftVerwendung_2 Off
                                                                                      60. ftVerwendung_3 Off
                                                                                      61. ftVerwendung_4 Off
                                                                                      62. ftNavigation Off
                                                                                      63. ftTaetigkeitsbereich Off
                                                                                      64. ftBemerkung
                                                                                      65. Michael Rehkamp Elster Kromschroumlder>btnSenden
Page 16: VAD, VAG, VAV, VAH, VRH, VCD, VCG, VCV, VCH · PDF fileVAD, VAG, VAH, VAV, VRH, VCD, VCG, VCV, VCH · Edition 04.15 6 VAD VAD VAS 1 .1 Examples of application 1 .1 .1 Constant pressure

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 16

3 1 2 Airgas ratio control VAGThe airgas ratio control VAG controls the outlet pressure pd depending on the variable air control pressure psaThe ratio of gas pressure to air pressure remains constant 11 The VAG is suitable for a control range up to 101If the burner operates at low-fire rate the gasair mixture can be changed by adjusting the zero point spring ldquoNrdquo

Function

psa

pd

Zero point setting N zero point spring

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 17

Function

3 1 3 Flow rate regulators VAH VRHThe flow rate regulators VAH VRH control the gas flow rate depending on the variable air flow rate The ratio of gas flow rate to air flow rate remains constant If the burner operates at low-fire rate the gasair mixture can be changed by adjusting the zero point spring ldquoNrdquoIn addition flow rate regulator VAH is designed as a gas solenoid valve and shuts off the gas or air supply safely

psa

psa-

pd-

pdInternal feedback

Zero point setting N zero point spring

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 18

3 1 4 Variable airgas ratio control VAVThe servo regulator maintains a set constant outlet pressure pd The variable airgas ratio control VAV controls the outlet pressure pd depending on the variable air control pressure psa The ratio of gas pressure to air pressure remains constantThe settings N and V can be changed and read off from both sides of the unit using the adjusting screwsThe ratio of gas pressure to air pressure at low-fire rate can be changed by adjusting the zero point setting N By turning the adjusting screw ldquoNrdquo the force of the zero point spring and thus the zero point is changed by plusmn 15 mbar (06 WC) see page 34 (Project planning information)The high-fire rate is set by turning the adjusting screw ldquoVrdquo until the required flue gas values are achieved see page 34 (Project planning information) The ratio of gas pressure to air pressure can be set from 061 to 31The settings N and V influence each other and the adjustment process must be repeated if necessaryThe outlet pressure pd is applied to the servo diaphragm via the internal feedback The combustion chamber control pres-sure psc is transmitted to the space under the air and servo diaphragms via an impulse lineThe pressure differential psa - psc is achieved on the air diaphragm and the pressure differential pd - psc on the servo diaphragm This ensures that pressure fluctuations in the combustion cham-ber can be compensated The flue gas values remain constant in the case of fluctuations in the combustion chamber pressure (pd - psc) = (psa - psc) times V + N

Function

pdpsc

psa

Air diaphragm

Transmission ratio V

Zero point setting N zero point spring

Internalfeedback

Adjustment diaphragm

Servo diaphragm

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 19

1 COM

2 NO

3 NC

3 1 5 Pressure regulator with gas solenoid valve VAx S position indicator with visual indicatorOpening when the pressure regulator is opened the posi-tion indicator switches The visual indicator is activated The ldquoopenrdquo signal is marked in red The double valve seat opens to release the volume of gasClosing the pressure regulator VAx is disconnected from the voltage supply and the closing spring presses the double valve disc on to the valve seat The position indicator is actuated The visual indicator is white for ldquoclosedrdquoThe actuator cannot be rotated on a pressure regulator with a position indicator and a visual indicatorNOTE NFPA 86 ndash the following must be taken into account as soon as the capacity of the pilot or main burner exceeds 117 kW (400000 BTUh) safety shut-off valve VASS must be fitted with a proof of closure overtravel switch with a visual position indicator and the burner-side pressure regulator with gas solenoid valve VAxS must also be fitted with a position indicator with visual indicator The closed position can be verified using the proof of closure switch of the gas solenoid valve VASS

Function

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 20

3 2 AnimationThe interactive animation shows the function of the valVario controls VADVAGVAHVAVClick on the picture The animation can be controlled using the control bar at the bottom of the window (as on a DVD player) To play the animation you will need Adobe Reader 7 or a newer version If you do not have Adobe Reader on your system you can download it from the Internet

Go to wwwadobecom click on ldquoAdobe Readerrdquo at the bottom of the page and follow the instructionsIf the animation does not start to play you can download it from the document library (wwwdocuthekcom) as an inde-pendent application

Function

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 21

3 3 Connection diagramWiring to EN 60204-1Connection diagram for VAxS with position indicator ndash see page 19 (Pressure regulator with gas solenoid valve VAxS position indicator with visual indicator)

3 3 1 VAx with M20 cable gland

L1 (+)

N (ndash)

3 3 2 VAx with plug

1 = N (-)

2 = L1 (+)

3 3 3 VAS with VADVAGVAHVAV with M20 cable glandL1V1 (+)

N (-)

L1V2 (+)

3 3 4 VAS with VADVAGVAHVAV with plug2 = L1V1 (+)

1 = N (-)

3 = L1V2 (+)

Function

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 22

4 Replacement possibilities for MODULINE pressure regulators with gas solenoid valve4 1 GVS GVI GVIB GVR and GVRH are to be replaced by VAD VAG VAG+VAS VAH and VAV

Type TypeGVS Pressure regulator with gas solenoid valve Pressure regulator with gas solenoid valve VADGVI Airgas ratio control with gas solenoid valve Airgas ratio control with gas solenoid valve VAG

GVIB Airgas ratio control with gas solenoid valve and bypass valve

Airgas ratio control with gas solenoid valve and bypass valve VAG+VAS

GVRH Flow rate regulator with gas solenoid valve Flow rate regulator with gas solenoid valve VAHGVR Variable airgas ratio control with gas solenoid valve Variable airgas ratio control with solenoid valve VAV115125 Flange 38 Size 115

Size 125 on request

115125 Flange frac12 Size 115

Size 125 Size 1 DN 15 115

115125 Flange frac34 Size 115

Size 125 Size 1 DN 20 120

115125 Flange 1 Size 115

Size 125 Size 1 DN 25 125

232240 Flange 1 Size 232

Size 240 on request

232240 Flange 1frac12 Size 232

Size 240 Size 2 DN 40 240

350 Flange 1frac12 Size 350 on request350 Flange 2 Size 350 Size 3 DN 50 350ML MODULINE + Rp internal thread connection fl anges Rp internal thread RTML MODULINE + NPT internal thread connection fl anges NPT internal thread N01 pu max 100 mbar (15 psig) pu max 500 mbar (7 psig) 02 200 mbar (3 psig) 500 mbar (7 psig)

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 23

Replacement possibilities for MODULINE pressure regulators with gas solenoid valve gt GVS GVI GVIB GVR and GVRH are to be replaced by VAD VAG VAG+VAS VAH and VAV

ContinuationType Type

Quick opening Quick opening NF1 Control ratio 11 Control ratio 11 K Mains voltage 24 V DC Mains voltage 24 V DC K

ndash 100 V AC PQ 120 V AC 120 V AC Q

ndash 200 V AC YT 220240 V AC 230 V AC W3 Electrical connection via terminals Electrical connection via terminals 6 Electrical connection via socket Electrical connection via socket 9 Metal terminal connection box Electrical connection via terminals S Position indicator Position indicator with visual indicator SG Position indicator for 24 V Position indicator for 24 V with visual indicator GM Suitable for biologically produced methane Suitable for biologically produced methane

Pressure test point at the inlet Pressure test point at the inlet and outlet Outlet pressure pd -25

Outlet pressure pd 25 ndash 25 mbar (1 ndash 10 WC)

2 ndash 90 mbar (08 ndash 36 WC) 20 ndash 50 mbar (8 ndash 20 WC) -5035 ndash 100 mbar (14 ndash 40 WC) -100Standard seat A

ExampleGVS 350ML01T3with Rp 2 connection flanges

ExampleVAD 350RNW-100A

with test points

= standard = available Pressure test points may be attached at the left- andor right-hand side Position indicator with visual indicator can be attached at the left- or right-hand side

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 24

∆p [i

nch

WC]

Qn [SCFH]100 400 600 4000 60001000 200020 30 40 50 200 3006015 80

1

08

1

2

3

4

56

8

10

20

30

40

5060

80

100

200

∆p [m

bar]

5

8

3

20

10

30

40

80

60

300

400

50

04 06 1 2 3 4 5 808 10 20 30 402

03 60 100 200

100

200

500

1

3

2

04 06 08 1 2 3 4 5 6 8 10 20 30 40

04 06 08 1 2 3 4 5 6 8 10

200

80 10020 3003

03Qn [m3h]

02

50 60 80 100

40 50 60

VAD

115

B

VAD

120

AVA

D 12

5A

P1P2

VAD

240

AVA

D 35

0A

= natural gas (ρ = 080 kgm3) = propane (ρ = 201 kgm3) = air (ρ = 129 kgm3)

The characteristic flow rate curves have been meas-ured with the specified flanges and a fitted strainer If two or more valves are combined the pressure loss of each additional valve drops by approx 5

metric imperial

Enter densityFlow rate Qn

Inlet pressure pu

Outlet pressure pd

Product RV v

Pressure loss ∆p

∆pmin

5 Flow rate5 1 Selection example for VADNatural gas Flow rate Qmax = 30 m3h Inlet pressure pu = 80 mbar Outlet pressure pd = 60 mbarThe desired control ratio from high-fire to low-fire rate is RV = 101High fire ∆p = pu - pd = 20 mbar Point P1Low fire Point P2 Qmin = 26 m3h at ∆p = 20 mbar RV = Qmax Qmin = 1151

Point P1 and point P2 must be within the working range of a unit size We recommend that you select the smallest size to achieve the best control properties

5 1 1 Calculate VAD

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 25

∆p [i

nch

WC]

Qn [SCFH]100 400 600 4000 60001000 200020 30 40 50 200 3006015 80

1

08

1

2

3

4

56

8

10

20

30

40

5060

80

100

200

∆p [m

bar]

5

8

3

20

10

30

40

80

60

300

400

50

04 06 1 2 3 4 5 808 10 20 30 402

03 60 100 200

100

200

500

1

3

2

04 06 08 1 2 3 4 5 6 8 10 20 30 40

04 06 08 1 2 3 4 5 6 8 10

200

80 10020 3003

03Qn [m3h]

02

50 60 80 100

40 50 60

= pd min lt 5 mbar

VAG

VxH

VAV

115

BVA

GV

xHV

AV 12

0A

VAG

VxH

VAV

125

A

P1

P2

VAG

VxH

VAV

240

AVA

GV

xHV

AV 3

50A

= natural gas (ρ = 080 kgm3) = propane (ρ = 201 kgm3) = air (ρ = 129 kgm3)

The characteristic flow rate curves have been meas-ured with the specified flanges and a fitted strainer If two or more valves are combined the pressure loss of each additional valve drops by approx 5

5 2 Selection example for VAG VAH VRH VAV Natural gas Flow rate Qmax = 30 m3h Inlet pressure pu = 80 mbar Outlet pressure pd max VAG = 60 mbarThe desired control ratio from high-fire to low-fire rate is RV = 101High fire ∆p = pu - pd max = 20 mbar Point P1Low fire pd min = pd max RV2 = 06 mbar Qmin = Qmax RV = 3 m3h ∆p = pu - pd min = 794 mbar Point P2 select VAG 120APoint P1 and point P2 must be within the working range of a unit size We recommend that you select the smallest size to achieve the best control properties

metric imperial

Enter densityFlow rate Qn

Inlet pressure pu

Outlet pressure pd

Product RV v

5 2 1 Calculate VAG VxH VAV

Pressure loss ∆p

∆pmin

Flow rate

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 26

∆p [i

nch

WC]

Qn [SCFH]100 400 600 4000 60001000 200020 30 40 50 200 3006015 80

1

08

1

2

3

4

56

8

10

20

30

40

5060

80

100

200

∆p [m

bar]

5

8

3

20

10

30

40

80

60

300

400

50

04 06 2 3 4 5 808 10 20 30 402

03 60 100 200

100

200

500

1

3

2

04 06 08 1 2 3 4 5 6 8 10 20 30 40

04 06 08 1 2 3 4 5 6 8 10

200

80 10020 3003

03Qn [m3h]

02

50 60 80 100

40 50 60

VAG

115

N

P1VAG

125

N

VAG

120

N

VAG

240

NP2

VAG

350

N

= natural gas (ρ = 080 kgm3) = propane (ρ = 201 kgm3) = air (ρ = 129 kgm3)

The characteristic flow rate curves have been meas-ured with the specified flanges and a fitted strainer If two or more valves are combined the pressure loss of each additional valve drops by approx 5

5 3 Selection example for zero governor VAG NNatural gas Flow rate Qmax = 30 m3h Inlet pressure pu = 20 mbar Outlet pressure pd = 0 mbar (atmospheric pressure)The desired control ratio from high-fire to low-fire rate is RV = 101High fire ∆p = pu - pd max = 20 mbar Point P1Low fire Point P2 Qmin = 24 m3h at ∆p = 20 mbar RV = Qmax Qmin = 1231Point P1 and point P2 must be within the working range of a unit size We recommend that you select the smallest size to achieve the best control properties

metric imperial

Enter densityFlow rate Qn

Inlet pressure pu

Outlet pressure pd

Product RV

5 3 1 Calculate VAG N

Pressure loss ∆p

∆pmin

Flow rate

v

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 27

6 Selection6 1 Selection table for pressure regulator with solenoid valve VAD

Accessories right Accessories left

Type1) T R N F N K P Q Y W S2) G2) R2) L2) M20

cab

le g

land

Plug

with

soc

ket

Plug

with

out s

ocke

t

-25-50 -100 A B Scre

w p

lug

Pres

sure

test

poi

nt

DG

17V

C 3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

Scre

w p

lug

Pres

sure

test

poi

nt

DG

17V

C 3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

VAD 115

VAD 120

VAD 125

VAD 240

VAD 350

= standard = available1) The following nominal inlet fl ange diameters are also available size 1 with nominal diameter DN 10 size 2 with nominal diameters DN 25 DN 32 and DN 50 size 3 with nominal diameters DN 40 and DN 652) Position indicator and bypasspilot gas valve cannot be fi tted together on the same side3) Specify the test point for inlet pressure pu or outlet pressure pdHelp for selecting the pressure regulator VAD can be found on the ProFi DVD wwwkromschroedercom Products DVD Product fi nder ldquoProFirdquo

Order exampleVAD 240RNW-100A

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 28

Selection

6 2 Type code for VADCode DescriptionVAD Pressure regulator with solenoid valve1 ndash 3 SizeT T-product10 ndash 65 Nominal inlet and outlet diameterRNF

Rp internal threadNPT internal thread

ISO fl angeN Quick opening quick closingKPQYW

Mains voltage 24 V DCMains voltage 100 V AC 5060 HzMains voltage 120 V AC 5060 HzMains voltage 200 V AC 5060 HzMains voltage 230 V AC 5060 Hz

SG

Position indicator with visual indicatorPosition indicator for 24 V with visual indicator

RL

Viewed from the right (in the direction of fl ow)Viewed from the left (in the direction of fl ow)

-25-50-100

Outlet pressure pd 25 ndash 25 mbar20 ndash 50 mbar

35 ndash 100 mbarAB

Standard valve seatReduced valve seat

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 29

Selection

6 3 Selection table for airgas ratio control with solenoid valve VAG flow rate regulators VAH VRH

Type1) T R N F N K P Q Y W S2) G2) R2) L2) M20

cab

le g

land

Plug

with

soc

ket

Plug

with

out s

ocke

t

A B E K A N Scre

w p

lug

Pres

sure

test

poi

ntD

G 1

7VC

3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

Scre

w p

lug

Pres

sure

test

poi

ntD

G 1

7VC

3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

VAG 115 VAG 120 VAG 125 VAG 240 VAG 350

VAH 115 VAH 120 VAH 125 VAH 240 VAH 350

VRH 115 VRH 120 VRH 125 VRH 240 VRH 350

= standard = available1) The following nominal inlet fl ange diameters are also available size 1 with nominal diameter DN 10 size 2 with nominal di-

ameters DN 25 DN 32 and DN 50 size 3 with nominal diameters DN 40 and DN 652) Position indicator and bypasspilot gas valve cannot be fi tted together on the same side3) Specify the test point for inlet pressure pu or outlet pressure pdHelp for selecting the regulators can be found on the ProFi DVD wwwkromschroedercom Products DVD Product fi nder ldquoProFirdquo

Order exampleVAG 240RNWAE

Accessories right Accessories left

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 30

Selection

6 4 Type code for VAG VAH VRHCode DescriptionVAGVAHVRH

Airgas ratio control with solenoid valveFlow rate regulator with solenoid valve

Flow rate regulator1 ndash 3 SizeT T-product15 ndash 50 Nominal inlet and outlet diameterRNF

Rp internal threadNPT internal thread

ISO fl angeN1) Quick opening quick closingK1)

P1)

Q1)

Y1)

W1)

Mains voltage 24 V DCMains voltage 100 V AC 5060 HzMains voltage 120 V AC 5060 HzMains voltage 200 V AC 5060 HzMains voltage 230 V AC 5060 Hz

S1)

G1)Position indicator with visual indicator

Position indicator for 24 V with visual indicatorRL

Viewed from the right (in the direction of fl ow)Viewed from the left (in the direction of fl ow)

AB

Standard valve seatReduced valve seat

EKAN

Connection kit for air control pressure psaVAG VAH VRH compression fi tting

VAG plastic hose couplingVAG VAH VRH NPT 18 adapter

VAG zero governor1) Only available for VAG VAV VAH

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 31

6 5 Selection table for variable airgas ratio control with solenoid valve VAVAccessories right Accessories left

Type1) T R N F N K P Q Y W S2) G2) R2) L2) M20

cab

le g

land

Plug

with

soc

ket

Plug

with

out s

ocke

t

A B E K A Scre

w p

lug

Pres

sure

test

poi

ntD

G 1

7VC

3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

Scre

w p

lug

Pres

sure

test

poi

ntD

G 1

7VC

3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

VAV 115

VAV 120

VAV 125

VAV 240

VAV 350

= standard = available1) The following nominal inlet fl ange diameters are also available size 1 with nominal diameter DN 10 size 2 with nominal diameters DN 25 DN 32 and DN 50 size 3 with nominal diameters DN 40 and DN 652) Position indicator and bypasspilot gas valve cannot be fi tted together on the same side3) Specify the test point for inlet pressure pu or outlet pressure pdHelp for selecting the variable airgas ratio control VAV can be found on the ProFi DVD wwwkromschroedercom

Products DVD Product fi nder ldquoProFirdquo

Order exampleVAV 240RNWAK

Selection

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 32

Selection

6 6 Type code for VAVCode DescriptionVAV Variable airgas ratio control with solenoid valve1 ndash 3 SizeT T-product15 ndash 50 Nominal inlet and outlet diameterRNF

Rp internal threadNPT internal thread

ISO fl angeN Quick opening quick closingKPQYW

Mains voltage 24 V DCMains voltage 100 V AC 5060 HzMains voltage 120 V AC 5060 HzMains voltage 200 V AC 5060 HzMains voltage 230 V AC 5060 Hz

SG

Position indicator with visual indicatorPosition indicator for 24 V with visual indicator

RL

Viewed from the right (in the direction of fl ow)Viewed from the left (in the direction of fl ow)

AB

Standard valve seatReduced valve seat

EKA

Connection kit for air control pressure psa and combus-tion chamber control pressure psc

compression fi ttingplastic hose coupling

NPT 18 adapter

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 33

Selection

6 7 AccessoriesModularly configurable withndash Screw plugsndash Pressure test pointsndash Pressure switch DGVC for inlet

andor outlet pressurendash Tightness control TCndash Bypasspilot gas valve VBY 8 for

size 1ndash Bypasspilot gas valve VAS 1For further information see page 37 (Accessories)

Position indicator

Plug with socket

Plug

Screwplugs

Pressuretest points

Pressure switch DGC Tightness

control TC

Bypasspilot gas valve VBY 8 for size 1

Bypasspilot gas valve VAS 1

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 34

7 Project planning informationDo not store or install the unit in the open airThe inlet pressure pu and the outlet pressure pd can be meas-ured on both sides of the valve body To increase the control accuracy an external impulse line can be connected instead of the pressure test point pd

VAD

pu

pd

(psa)

VAGpd

pu

psa

psa

VAD measurement point for the gas outlet pressure pd on the regulator body A combustion chamber control line (psc) can be connected to connection psa for maintaining a constant burner capacityVAG additional measurement point for the air control pressure psa on the regulator body

VAV

psapsc

pu

pd

VAH VRH

pu

pd-

pdpsa-

psa

VAV measurement point for the outlet pressure pd on the regulator bodyVAH additional measurement points for the outlet pressure pd- and the air control pressure psapsa- on the regulator body

7 1 Installation

GFK

VAGVAH

GFKVAD

Sealing material and thread cuttings must not be allowed to get into the valve housing Install a filter upstream of every system

gt20 mmgt0 79

The unit must not be in contact with masonry Minimum clear-ance 20 mm (079 inches)Ensure that there is sufficient space for installation and ad-justment

le +100 degCle +212 degF

The solenoid body heats up during operation ndash depending on ambient temperature (max 60degC140degF) and intrinsic heating (approx 40degC104degF)

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 35

In the case of double solenoid valves the position of the con-nection box can only be changed by removing the actuator and reinstalling it offset by 90deg or 180deg

If more than three valVario controls are installed in line the controls must be supported

The seals in some gas compression fittings are approved for temperatures of up to 70degC (158degF) This temperature limit will not be exceeded if the flow through the pipe is at least 1 msup3h (3531 SCFH) of gas and the maximum ambient temperature is 50degC (122degF)

7 1 1 Installation position

pu ge 80 mbar(80 hPa32 WC)

VAD VAG VAH VRH VAV

In humid environments black solenoid actuator in the vertical upright position only

VAD VAG VAH VRH black solenoid actuator in the vertical upright position or tilted up to the horizontal not upside downVAG VAH horizontal position only if pu ge 80 mbar (32 WC))VAV installation in the vertical position only black solenoid actuator in the vertical upright positionTo ensure that the airgas ratio control VAG the flow rate regulator VAH VRH or the variable airgas ratio control VAV can react quickly when the load is changed the impulse line for the air control pressure psa and for VAV the impulse line for the combustion chamber control pressure psc should be kept as short as possible The tube internal diameter for the impulse line must always be ge 39 mm (015)

VAH VRHIt is not permitted to install a gas solenoid valve VAS down-stream of flow rate regulator VAH VRH and upstream of fine-adjusting valve VMV The VAS would no longer be able to perform its function as a second safety valve if installed in the above-mentioned position

M

VMV

VAH

VASVAS

pd-

psa-psa

VMV

VAH pd-

psa-psa

The measuring orifice in the air line for impulse lines psa and psa- must always be installed downstream of the air control valve

Project planning information gt Installation

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 36

VAVThe impulse line for the combustion chamber control pres-sure psc must be fitted so that no condensation can enter the pressure regulator but rather flows back into the combustion chamber

7 2 Setting the low-fire rate on VAG VAH VRH VAV

-10 +05-05

ndash

+1

-15

mbar

+15

06

1 152

3

N V

+ +ndash

+30 -15+15

ndash

-3

+5

mbar

-5

N

+

VAG VAH VRH VAV

If the burner operates at low-fire rate the gasair mixture can be changed using the parallel shift of the characteristic curve by turning the adjusting screw ldquoNrdquoAdjusting range at low fire VAG VAH VRH -5 to +5 mbar (-195 to +195 WC) VAV -15 to +15 mbar (-06 to +06 WC)

7 3 Setting the high-fire rate on VAVTo set the high-fire rate the transmission ratio is changed us-ing the adjusting screw ldquoVrdquo until the required flue gas values are achievedTransmission ratio V = pdpsa = 061 to 31The settings N and V can influence each other and must be repeated if necessary

+N+V

-V

-N

VAV

psa [mbar]

p d [m

bar]

7 3 1 CalculationWith no connection to the combustion chamber control pres-sure psc pd = V times psa + NWith connection to the combustion chamber control pressure psc (pd - psc) = V times (psa - psc) + N

Project planning information

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 37

pu pd

21579

4836

085310

189

142

8 Accessories8 1 Gas pressure switch DG VC for VAx VRHType Adjusting range [mbar]DG 17VC 2 to 17DG 40VC 5 to 40DG 110VC 30 to 110DG 300VC 100 to 300

Scope of delivery 1 times pressure switch for gas 2 times retaining screws 2 times sealing rings

8 2 Gas pressure switch DG VCT for VAx T VRH TType Adjusting range [WC]DG 17VCT 08 to 68DG 40VCT 2 to 16DG 110VCT 12 to 44DG 300VCT 40 to 120

Scope of delivery 1 times gas pressure switch with AWG 18 connection wires 2 times retaining screws 2 times sealing ringsMonitoring the inlet pressure pu the electrical plug of the pressure switch for gas points towards the inlet flangeMonitoring the outlet pressure pd the electrical plug of the pressure switch for gas points towards the outlet flange

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 38

A BC

D

FE

ACD

F

B

E

8 3 Bypass valvepilot gas valve VAS 18 3 1 VAS 1 attached to VADVAGVAHVAV 1Scope of delivery A 1 times bypasspilot gas valve VAS 1 B 4 times O-rings C 4 times double nuts D 4 times connection parts E 1 times mounting aidBypass valve VAS 1 F 2 times connection pipes if the bypass valve has a blind flange

at the outlet sidePilot gas valve VAS 1 F 1 times connection pipe 1 times sealing plug if the pilot gas valve

has a threaded flange at the outlet side

Accessories

8 3 2 VAS 1 attached to VADVAGVAHVAV 2 VADVAGVAHVAV 3Scope of delivery A 1 times bypasspilot gas valve VAS 1 B 4 times O-rings C 4 times spacer sleeves D 4 times connection parts E 1 times mounting aidBypass valve VAS 1 F 2 times connection pipes if the bypass valve has a blind flange

at the outlet sidePilot gas valve VAS 1 F 1 times connection pipe 1 times sealing plug if the pilot gas valve

has a threaded flange at the outlet side

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 39

2

3

456

810

20

30

405060

80100

∆p [m

bar]

005 01 02 03 05 08 1 2 3 4 51

3

2

Qn [m3h]

1

01

02

03

0405

08

003

002

6 8 10

005 01 02 03 05 08 1 2 3 4 5003 6 8 10

20

005 01 02 03 05 08 1 2 3 4 5003 6 8 10 20

30

∆p [i

nch

WC]

1

2

3

456

810

20

30

40

04

004

006

00801

02

03

0506

08

Qn [SCFH]10 40 60 100 200 3001 500 10002 3 4 5

120 306 8

21 3 4 5 6 7 8 910

8 3 3 Flow rate

The characteristic flow rate curves have been measured for bypass valve VAS 1 with connection pipe diameter 1 to 10 mm (004 to 04) and for the pilot gas valve with 10 mm (04) connection pipe

Bypass valve connection pipe diameter [mm]

Pilo

t gas

val

ve 1

0 m

m (0

4)

conn

ectio

n pi

pe d

iam

eter

Accessories gt Bypass valvepilot gas valve VAS 1

= natural gas (ρ = 080 kgm3) = propane (ρ = 201 kgm3) = air (ρ = 129 kgm3)

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 40

Accessories

8 4 Bypass valvepilot gas valve VBY 8 for VADVAGVAHVAV 1

B

C

AVBY 8

VAx 1

55

(217)40(157)

70 (276)

80(315)

Rp frac14(pilot gas valve)

For mounting on VAD VAG VAH VAV 1 and double solenoid valve VCD VCG VCH VCV 1

8 4 1 Scope of delivery VBY 8I as bypass valveA 1 times bypass valve VBY 8IB 2 times retaining screws with 4 times O-rings both retaining screws

have a bypass orificeC 1 times grease for o-rings

8 4 2 Scope of delivery VBY 8R as pilot gas valveA 1 times pilot gas valve VBY 8RB 2 times retaining screws with 5 x O-rings one retaining screw

has a bypass orifice (2 x O-rings) the other does not (3 x O-rings)

C 1 times grease for O-rings

8 4 3 SelectionType I R W Q K 6L -R -L E B D 05

VBY 8

Order exampleVBY 8RW6L-LED

8 4 4 Type codeCode DescriptionVBY Gas solenoid valve8 Nominal sizeIR

For internal gas pick-up as bypass valveFor external gas pick-up as pilot gas valve

KQW

Mains voltage 24 V DC Mains voltage 120 V AC 5060 HzMains voltage 230 V AC 5060 Hz

6L Electrical connection via plug and socket with LED-R-L

Attachment side of main valve right-hand sideAttachment side of main valve left-hand side

EB

Attached to the VAxEnclosed (separate packing unit)

05D

Nozzle diameter = 05 mm (002)Flow adjustment

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 41

2

01

02

03

05

081

3

456

810

20

30

405060

80100

∆p [m

bar]

1

3

201 02 03 05 1 2 3001 003 4

Qn [m3h]

02 03 05 1 2

01 02 05

002 006

002

002 006 1

0010006 005 01

001

0003

0006 2 3

VBY 8DVBY 805

∆p [i

nch

WC]

1

2

3

456

810

20

30

40

040506

08

1

Qn [SCFH]10 40 60 1005 2081 2 30402

01

02

03

004005006

008

Adjusting range

8 4 5 Flow rateVBY 8 D

+

-

The flow rate can be set by turning the flow rate restrictor (4 mm016 Allen screw) frac14 of a turn Flow rate 10 to 100

VBY 8 05The flow is routed through a 05 mm (002) nozzle and thus has a fixed characteristic flow rate curve Adjustment is not possible

8 4 6 Technical dataInlet pressure pu max 500 mbar (7 psig)Ambient temperature 0 to +60degC (32 to 140degF) no condensation permittedStorage temperature 0 to +40degC (32 to 104degF) no condensation permittedPower consumption 24 V = 8 W 120 V = 8 W 230 V = 95 WEnclosure IP 54

Accessories gt Bypass valvepilot gas valve VBY 8 for VADVAGVAHVAV 1

= natural gas (ρ = 080 kgm3) = propane (ρ = 201 kgm3) = air (ρ = 129 kgm3)

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 42

TC 116VB C

56(22)

49(193)

27(106)

A

A

VCx 1 VCx 2VCx 3

8 5 Tightness control TC 116Vfor VAx 1 ndash 3An adapter plate is required to attach the tightness control to the right- or left-hand side of the pressure regulator with gas solenoid valveScope of delivery A 1 times adapter plate B 2 times O-rings C 2 times retaining screwsFor attachment to left-hand side Order No 74922391 right-hand side Order No 74921995

8 6 Pressure test pointsTest points to check the inlet pressure pu and outlet pressure pdScope of delivery 1 x pressure test points with 1 x profiled sealing rings Order No 74923390

8 7 Cable gland setWhen wiring a double solenoid valve with pressure regula-tor VCx the connection boxes are to be connected using a cable gland setThe cable gland set can only be used if the connection boxes are at the same height and on the same side and if both valves are equipped either with or without a proof of closure switchVA 1 Order No 74921985 VA 2 Order No 74921986 VA 3 Order No 74921987

Accessories

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 43

A B

D

C

Accessories

8 9 Differential pressure orifice

Size PipeDN

Differential pressure orifi cewith outlet dia

1 15 17 mm 0671 20 25 mm 0981 25 30 mm 1182 40 46 mm 1813 50 58 mm 228

If pressure regulator VADVAGVAV 1 is retrofitted upstream of gas solenoid valve VAS 1 a DN 25 differential pressure orifice with outlet opening d = 30 mm (118) must be inserted at the outlet of the pressure regulatorIn the case of pressure regulator VAx 115 or VAx 120 the DN 25 differential pressure orifice must be ordered separately and retrofitted Order No 74922240

8 8 Seal set VA 1 ndash 3VA 1 Order No 74921988 VA 2 Order No 74921989 VA 3 Order No 74921990Scope of deliveryA 1 times double block seal B 2 times O-rings (flange) C 2 times O-rings (pressure switch) for pressure test pointscrew plug D 2 times sealing rings (flat sealing) and 2 times profiled sealing rings

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 44

BA

C

pd-

8 11 Attachment blockFor locked installation of pressure gauge and other acces-soriesScope of delivery A 1 times attachment block B 2 times self-tapping screws for installation C 2 times O-rings

Accessories

8 10 Retaining frameIn the event that a pressure regulator VAx is installed at a later point upstream of a gas solenoid valve VAS a measur-ing orifice VMO or a fine-adjusting valve VMV the retaining frame must be fitted at the inlet of the second device in order to fasten the differential pressure orifice at the regulator outlet Order the retaining frame separatelyRetaining frame for Size 1 Order No 74923029 Size 2 Order No 74923030 Size 3 Order No 74923031

8 12 Gas control lineFine-adjusting valve VMV can be installed on the flow rate regulator VAH for fine adjustment of the gas flow rateThe gas control line for gas outlet pressure pd- is available with 2 18 compression fittingsSize 1 Order No 74924458 Size 2 Order No 74924459

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 45

8 13 Measuring orifice VMOThe measuring orifice VMO is designed to reduce the gas and air flow rates and is installed downstream of the valVario control The measuring orifice is available with Rp internal thread (NPT internal thread) or flange to ISO 7005See wwwdocuthekcom Elster Kromschroumlder Krom-schroumlder LBE Products 03 Valves and butterfly valves valVario accessories Type of document Technical Informa-tion VMO

Accessories

8 14 Filter module VMFUsing the filter module VMF the gas flow upstream of the gas solenoid valve VAS and the airgas ratio control is cleaned The filter module is available with Rp internal thread (NPT internal thread) or flange to ISO 7005 and can also be supplied with fitted pressure switch as an optionSee wwwdocuthekcom Elster Kromschroumlder Krom-schroumlder LBE Products 03 Valves and butterfly valves valVario accessories Type of document Technical Informa-tion VMF

8 15 Fine-adjusting valve VMVThe flow rate is set using the fine-adjusting valve VMV The fine-adjusting valve is available with Rp internal thread (NPT internal thread) or flange to ISO 7005See wwwdocuthekcom Elster Kromschroumlder Krom-schroumlder LBE Products 03 Valves and butterfly valves valVario accessories Type of document Technical Infor-mation VMV

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 46

9 Technical dataGas types natural gas LPG (gaseous) biologically produced methane (max 01 -by-vol H2S) or clean air other gases on request The gas must be clean and dry in all temperature conditions and must not contain condensateCE and FM approved UL listed max inlet pressure pu 10 ndash 500 mbar (4 ndash 200 WC) FM approved (230 V AC 120 V AC 24 V DC) non opera-tional pressure 700 mbar (10 psig)ANSICSA approved (230 V AC 120 V AC 24 V DC) up to 350 mbar (5 psig)Opening time of the solenoid valve quick opening le 05 s Closing time quick closing lt 1 sMedium and ambient temperatures -20 to +60degC (-4 to +140degF) no condensation permittedStorage temperature -20 to +40degC (-4 to +104degF)Enclosure IP 65Valve housing aluminium valve seal NBRConnection flanges with internal thread Rp to ISO 7-1 NPT to ANSIASMESafety valve Class A to EN 161 Factory Mutual Research Class 7400 Process Control Valves (230 V AC 120 V AC 24 V DC) ANSI Z2121 and CSA 65 ANSI Z2118 and CSA 63Control class A to EN 88-1Control range up to 101

Mains voltage 230 V AC +10-15 5060 Hz 200 V AC +10-15 5060 Hz 120 V AC +10-15 5060 Hz 100 V AC +10-15 5060 Hz 24 V DC plusmn20Duty cycle 100Power factor of the solenoid coil cos φ = 09Power consumption

Type Voltage Power

VAx 1

24 V DC 25 W ndash100 V AC 25 W (26 VA)120 V AC 25 W (26 VA)200 V AC 25 W (26 VA)230 V AC 25 W (26 VA)

VAx 2 VAx 3

24 V DC 36 W ndash100 V AC 36 W (40 VA)120 V AC 40 W (44 VA)200 V AC 40 W (44 VA)230 V AC 40 W (44 VA)

VBY24 V DC 8 W ndash

120 V AC 8 W ndash230 V AC 95 W ndash

Cable gland M20 times 15Electrical connection cable with max 25 mm2 (AWG 12) or plug with socket to EN 175301-803

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 47

Position indicator contact rating

Type Voltage Min current(resistive load)

Max current(resistive load)

VAxS VCxS 12 ndash 250 V AC 5060 Hz 100 mA 3 AVAxG VCxG 12 ndash 30 V DC 2 mA 01 A

Position indicator switching frequency max 5 times per minute

Switching current [A]

Switching cyclescos φ = 1 cos φ = 06

01 500000 50000005 300000 250000

1 200000 1000003 100000 ndash

Limited to max 200000 cycles for heating systems

9 1 VADOutlet pressure pd VAD-25 25 ndash 25 mbar (1 ndash 10 WC) VAD-50 20 ndash 50 mbar (8 ndash 20 WC) VAD-100 35 ndash 100 mbar (14 ndash 40 WC)Combustion chamber control pressure psc (connection psa)

-20 to +20 mbar (-78 to +78 WC)

VAD

pu

pd

(psa)

9 2 VAGOutlet pressure pd 05 ndash 100 mbar (02 ndash 40 WC)Air control pressure psa 05 ndash 100 mbar (02 ndash 40 WC)

Adjusting range at low fire plusmn5 mbar (plusmn2 WC)Transmission ratio of gas to air 11The inlet pressure must always be higher than the air control pressure psa + pressure loss ∆p + 5 mbar (2 WC)

VAGpd

pu

psa

psa

VAGK 1 x 18 coupling for plastic hose (internal dia 39 mm (015) external dia 61 mm (024)) or VAGE 1 x 18 compression fitting for 6 times 1 tube or VAGA 1 x NPT 18 adapter or VAGN zero governor with breathing orifice

9 3 VAH VRHAir control pressure psa 06 ndash 100 mbar (024 ndash 40 WC) Differential air pressure ∆psa (psa - psa-) 06 ndash 50 mbar (024 ndash 197 WC) Differential gas pressure ∆pd (pd - pd-) 06 ndash 50 mbar (024 ndash 197 WC)Transmission ratio of gas to air 11The inlet pressure must always be higher than the differen-tial air pressure ∆psa + pressure loss ∆p + max gas pres-sure on burner + 5 mbar (2 WC)Adjusting range at low fire plusmn5 mbar (plusmn2 WC)

Technical data

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 48

VAHVRH

pd-

pu

psa-

psa

Connection of the air control pressure psaVAHE VRHE 3 x 18 compression fitting for 6 times 1 tube or VAHA VRHA 3 x NPT 18 adapter

9 4 VAVOutlet pressure pd 05 ndash 30 mbar (02 ndash 117 WC)Air control pressure psa 04 ndash 30 mbar (015 ndash 117 WC)Combustion chamber control pressure psc

-20 to +20 mbar (-78 to +78 WC)Min control pressure differential psa - psc 04 mbar (015 WC)Min pressure differential pd - psc 05 mbar (02 WC)Adjusting range at low fire plusmn15 mbar (plusmn06 WC)Transmission ratio of gas to air 061 to 31The inlet pressure pu must always be higher than the air control pressure psa times transmission ratio V + pressure loss ∆p + 15 mbar (06 WC)

pu

pd psapsc

VAV

VAVK 2 x plastic hose couplings (internal dia 39 mm (015) external dia 61 mm (024)) or VAVE 2 x 18 compression fitting for 6 times 1 tube or VAVA 2 x NPT 18 adapter

Technical data

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 49

9 5 Safety-specific characteristic values for VAx 1 ndash 3For SILSuitable for Safety Integrity Level SIL 1 2 3

Diagnostic coverage DC 0

Type of subsystem Type A to EN 61508-2 74312

Operating mode High demand mode pursu-ant to EN 61508-4 3512

For PLSuitable for Performance Level PL a b c d e

Category B 1 2 3 4Common cause failure CCF gt 65Application of essential safety requirements Satisfied

Application of tried-and-tested safety requirements Satisfied

For SIL and PL

B10d value

Operating cyclesVAD VAG VAV VAH 1 10094360VAD VAG VAV VAH 2 8229021VAD VAG VAV VAH 3 6363683

Hardware fault tolerance (1 valve) HFT 0

Hardware fault tolerance (2 valves) HFT 1

Safe failure fraction SFF gt 90Fraction of undetected com-mon cause failures β ge 2

Max service life under operating conditions10 years after date of production plus max 12 year in stor-age prior to first use or once the given number of operating cycles has been reached depending on which is achieved firstThe devices are suitable for single-channel systems (HFT = 0) up to SIL 2PL d and up to SIL 3PL e when two re-dundant valves are installed in a double-channel architecture (HFT = 1) provided that the complete system complies with the requirements of EN 61508ISO 13849

For a glossary of terms see page 53 (Glossary)

Technical data

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 50

nop 1hnop 1a

sB10d

T10d aPFHD (1 VAx) 1h

PFHD (2 VAx) 1h

PFDavg (1 VAx)

PFDavg (2 VAx)

Technical data gt Safety-specific characteristic values for VAx 1 ndash 3

9 5 1 Determining the PFHD value the λD value and the MTTFd value

PFHD = λD = x nop= 1MTTFd

01B10d

PFDavg = x λD x 24 x 365 x T10d 12

Type

Cycle time

suitable for

suitable for

PFHD = Probability of dangerous failure (HDM = high de-mand mode) [1hour]PFDavg = Average probability of dangerous failure on de-mand (LDM = low demand mode)λD = Mean dangerous failure rate [1hour]MTTFd = Mean time to dangerous failure [hours]nop = Demand rate (mean number of annual operations) [1hour]

9 5 2 Calculating the PFHD and PFDavg

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 51

VAD VAG VAH VAV

H1

Rp frac14(NPT frac14)

H2

E

LF

F

H4

H3

B

VAxS VAxF

L2G

G

Technical data

9 6 Dimensions

Type

Connec-tion Dimensions

WeightRpNPT DN

L L2 E F G H1 H2 H3 H4 Bmm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch kg lbs

VAx 115 12 15 75 29 ndash ndash 75 29 15 06 ndash ndash 143 56 82 32 161 63 117 46 97 38 18 40VAH 115 12 15 75 29 ndash ndash 75 29 15 06 ndash ndash 143 56 100 39 161 63 135 53 97 38 2 44VAx 120 34 20 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 82 33 161 63 117 46 97 38 19 42VAH 120 34 20 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 100 39 161 63 135 53 97 38 21 46VAx 125 1 25 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 82 33 161 63 117 46 97 38 19 42VAH 125 1 25 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 100 39 161 63 135 53 97 38 21 46VAx 240 112 40 128 50 200 79 85 33 29 11 66 26 170 67 112 44 191 75 162 64 125 49 44 97VAH 240 112 40 128 50 200 79 85 33 29 11 66 26 170 67 132 52 191 75 182 72 125 49 47 104VAx 350 2 50 155 61 230 91 85 33 36 14 74 29 180 70 135 53 201 79 196 77 160 63 61 134VAH 350 2 50 155 61 230 91 85 33 36 14 74 29 180 70 156 61 201 79 217 85 160 63 64 141

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 52

10 Converting unitssee wwwadlatusorg

11 Maintenance cyclesAt least once per annum at least twice per annum for biologi-cally produced methaneIf the flow rate drops clean the strainer

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 53

12 Glossary12 1 Diagnostic coverage DCMeasure of the effectiveness of diagnostics which may be determined as the ratio between the failure rate of detected dangerous failures and the failure rate of total dangerous failuresNOTE Diagnostic coverage can exist for the whole or parts of a safety-related system For example diagnostic cover-age could exist for sensors andor logic system andor final elements Unit see EN ISO 13849-12008

12 2 Mode of operationHigh demand mode or continuous modeOperating mode where the frequency of demands for opera-tion made on a safety-related system is greater than one per year or greater than twice the proof-test frequencysee EN 61508-42008

12 3 CategoryClassification of the safety-related parts of a control system in respect of their resistance to faults and their subsequent behaviour in the fault condition and which is achieved by the structural arrangement of the parts fault detection andor by their reliability see EN ISO 13849-12008

12 4 Common cause failure CCFFailures of different items resulting from a single event where these failures are not consequences of each othersee EN ISO 13849-12008

12 5 Fraction of undetected common cause failures β Fraction of undetected failures of redundant components due to a single event whereby these failures are not based on mutual causesNOTE β is expressed as a fraction in the equations and as a percentage elsewheresee EN 61508-62010

12 6 B10d valueMean number of cycles until 10 of the components fail dan-gerouslysee EN ISO 13849-12008

12 7 T10d valueMean time until 10 of the components fail dangerouslysee EN ISO 13849-12008

12 8 Hardware fault tolerance HFTA hardware fault tolerance of N means that N + 1 is the mini-mum number of faults that could cause a loss of the safety functionsee IEC 61508-22010

12 9 Mean dangerous failure rate λD Mean rate of dangerous failures during operation time (T10d) Unit 1hsee EN ISO 13849-12008

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 54

12 10 Safe failure fraction SFFFraction of safe failures related to all failures which are as-sumed to appearsee EN 13611A22011

12 11 Probability of dangerous failure PFHD Value describing the likelihood of dangerous failure per hour of a component for high demand mode or continuous mode Unit 1hsee EN 13611A22011

12 12 Mean time to dangerous failure MTTFd Expectation of the mean time to dangerous failuresee EN ISO 13849-12008

12 13 Demand rate nop Mean number of annual operationssee EN ISO 13849-12008

12 14 Average probability of dangerous failure on demand PFDavg (LDM = 1 ndash 10 switching cyclesyear)Average probability of a dangerous failure of the safety function on demand (LDM = low demand mode)see EN 61508-6

Glossary

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415

Finally we are offering you the opportunity to assess this ldquoTechnical Information (TI)rdquo and to give us your opinion so that we can improve our documents further and suit them to your needs

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Remarks

(Adobe Reader 7 or higher required) wwwadobecom

Elster GmbH Postfach 2809 middot 49018 Osnabruumlck Strotheweg 1 middot 49504 Lotte (Buumlren) GermanyT +49 541 1214-0 F +49 541 1214-370 infokromschroedercomwwwkromschroedercom

The current addresses of our international agents are available on the Internetwwwkromschroederdeindexphpid=718ampL=1

We reserve the right to make technical modifications in the interests of progressCopyright copy 2015 Elster GmbH All rights reserved

Contact

Feedback

0325

0530

  • Pressure regulators with solenoid valve VAD VAG VAV VAH
  • Flow rate regulator VRH
  • Pressure regulators with double solenoid valve VCD VCG VCV VCH
  • Contents
  • 1 Application
    • 11 Examples of application
      • 111 Constant pressure control
      • 112 Constant pressure control with two gas solenoid valves
      • 113 Constant pressure control with max pressure switch
      • 114 Constant pressure control with non-controlled pilot gas outlet
      • 115 Modulating control
      • 116 Modulating control with two gas solenoid valves
      • 117 Modulating control with two gas solenoid valves and inlet pressure switch
      • 118 HighLow control
      • 119 Zero pressure control
      • 1110 Staged flow rate control
      • 1111 Continuous or staged flow rate control
      • 1112 Modulating control with variable airgas ratio control with gas solenoid valve
      • 1113 Modulating control in residential heat generation
          • 2 Certification
          • 3 Function
            • 31 VAD VAG VAH VRH VAV
              • 311 Pressure regulator for gas VAD
              • 312 Airgas ratio control VAG
              • 313 Flow rate regulators VAH VRH
              • 314 Variable airgas ratio control VAV
              • 315 Pressure regulator with gas solenoid valve VAxS position indicator with visual indicator
                • 32 Animation
                • 33 Connection diagram
                  • 331 VAx with M20 cable gland
                  • 332 VAx with plug
                  • 333 VAS with VADVAGVAHVAV with M20 cable gland
                  • 334 VAS with VADVAGVAHVAV with plug
                      • 4 Replacement possibilities for MODULINE pressure regulators with gas solenoid valve
                        • 41 GVS GVI GVIB GVR and GVRH are to be replaced by VAD VAG VAG+VAS VAH and VAV
                          • 5 Flow rate
                            • 51 Selection example for VAD
                              • 511 Calculate VAD
                                • 52 Selection example for VAG VAH VRH VAV
                                  • 521 CalculateVAG VxHVAV
                                    • 53 Selection example for zero governor VAGN
                                      • 531 Calculate VAGN
                                          • 6 Selection
                                            • 61 Selection table for pressure regulator with solenoid valve VAD
                                            • 62 Type code for VAD
                                            • 63 Selection table for airgas ratio control with solenoid valve VAG flow rate regulators VAH VRH
                                            • 64 Type code for VAG VAH VRH
                                            • 65 Selection table for variable airgas ratio control with solenoid valve VAV
                                            • 66 Type code for VAV
                                            • 67 Accessories
                                              • 7 Project planning information
                                                • 71 Installation
                                                  • 711 Installation position
                                                    • 72 Setting the low-fire rate on VAG VAH VRH VAV
                                                    • 73 Setting the high-fire rate on VAV
                                                      • 731 Calculation
                                                          • 8 Accessories
                                                            • 81 Gas pressure switch DGVC for VAx VRH
                                                            • 82 Gas pressure switch DGVCT for VAxT VRHT
                                                            • 83 Bypass valvepilot gas valve VAS 1
                                                              • 831 VAS 1 attached to VADVAGVAHVAV 1
                                                              • 832 VAS 1 attached to VADVAGVAHVAV 2 VADVAGVAHVAV 3
                                                              • 833 Flow rate
                                                                • 84 Bypass valvepilot gas valve VBY 8 for VADVAGVAHVAV 1
                                                                  • 841 Scope of delivery VBY 8I as bypass valve
                                                                  • 842 Scope of delivery VBY 8R as pilot gas valve
                                                                  • 843 Selection
                                                                  • 844 Type code
                                                                  • 845 Flow rate
                                                                  • 846 Technical data
                                                                    • 85 Tightness control TC 116V
                                                                    • 86 Pressure test points
                                                                    • 87 Cable gland set
                                                                    • 88 Seal set VA 1thinspndashthinsp3
                                                                    • 89 Differential pressure orifice
                                                                    • 810 Retaining frame
                                                                    • 811 Attachment block
                                                                    • 812 Gas control line
                                                                    • 813 Measuring orifice VMO
                                                                    • 814 Filter module VMF
                                                                    • 815 Fine-adjusting valve VMV
                                                                      • 9 Technical data
                                                                        • 91 VAD
                                                                        • 92 VAG
                                                                        • 93 VAH VRH
                                                                        • 94 VAV
                                                                        • 95 Safety-specific characteristic values for VAx 1thinspndashthinsp3
                                                                          • 951 Determining the PFHD value the λD value and the MTTFd value
                                                                          • 952 Calculating the PFHD and PFDavg
                                                                            • 96 Dimensions
                                                                              • 10 Converting units
                                                                              • 11 Maintenance cycles
                                                                              • 12 Glossary
                                                                                • 121 Diagnostic coverage DC
                                                                                • 122 Mode of operation
                                                                                • 123 Category
                                                                                • 124 Common cause failure CCF
                                                                                • 125 Fraction of undetected common cause failures β
                                                                                • 126 B10d value
                                                                                • 127 T10d value
                                                                                • 128 Hardware fault tolerance HFT
                                                                                • 129 Mean dangerous failure rate λD
                                                                                • 1210 Safe failure fraction SFF
                                                                                • 1211 Probability of dangerous failure PFHD
                                                                                • 1212 Mean time to dangerous failure MTTFd
                                                                                • 1213 Demand rate nop
                                                                                • 1214 Average probability of dangerous failure on demand PFDavg
                                                                                  • Feedback
                                                                                  • Contact
                                                                                      1. naechste_Seite 24
                                                                                      2. naechste Seite 18
                                                                                      3. naechste Seite 6
                                                                                      4. naechste Seite 16
                                                                                      5. naechste Seite 14
                                                                                      6. naechste Seite 25
                                                                                      7. naechste_Seite 11
                                                                                      8. naechste_Seite 17
                                                                                      9. fbArbeitspunkt_Min Ja
                                                                                      10. fbArbeitspunkt Ja
                                                                                      11. ftProgramm Standard-Programm
                                                                                      12. fz_kv
                                                                                      13. fz_pe 80
                                                                                      14. fz_pG 60
                                                                                      15. fzDelta_p_Soll 20
                                                                                      16. ftEinheit_Druck mbar
                                                                                      17. fatTyp [115]
                                                                                      18. fbArbeitspunkt_Min_2 Ja
                                                                                      19. fbArbeitspunkt_2 Ja
                                                                                      20. ftRegler_Typ VAG
                                                                                      21. ftProgramm_2 Standard-Programm
                                                                                      22. fz_kv_2
                                                                                      23. fatMedium [08]
                                                                                      24. fzDichte 08
                                                                                      25. ftEinheit_Dichte kgm3
                                                                                      26. fzV_Norm 30
                                                                                      27. ftEinheit_Volstrom m3h
                                                                                      28. fz_pe_2 80
                                                                                      29. fz_pG_2 60
                                                                                      30. fzDelta_p_Soll_2 20
                                                                                      31. ftEinheit_Druck2 [mbar]
                                                                                      32. ftEinheit_Geschw [ms]
                                                                                      33. fatTyp_2 [10954451150103322]
                                                                                      34. fbArbeitspunkt_Min_3 Ja
                                                                                      35. fbArbeitspunkt_3 Ja
                                                                                      36. ftProgramm_3 Standard-Programm
                                                                                      37. fz_kv_3
                                                                                      38. fz_pe_3 20
                                                                                      39. fz_pG_3 0
                                                                                      40. fzDelta_p_Soll_3 20
                                                                                      41. fatTyp_3 [123]
                                                                                      42. fatSchaltleistung [6363683]
                                                                                      43. fz_nop_Stunde 1
                                                                                      44. fz_nop_Jahr 8760
                                                                                      45. fzZyklus 3600
                                                                                      46. fzB10d 6363683
                                                                                      47. fzT10d 10
                                                                                      48. fzPFHd_1V 15714170551864384e-8
                                                                                      49. fzPFDavg_1V
                                                                                      50. ftGeeignet_1V PL d SIL 2
                                                                                      51. fzPFHd_2V 33505832253532625e-10
                                                                                      52. fzPFDavg_2V
                                                                                      53. ftGeeignet_2V PL e SIL 3
                                                                                      54. ftUebersicht Off
                                                                                      55. ftVerstaendlichkeit Off
                                                                                      56. ftFehlende_Info
                                                                                      57. ftUmfang Off
                                                                                      58. ftVerwendung_1 Off
                                                                                      59. ftVerwendung_2 Off
                                                                                      60. ftVerwendung_3 Off
                                                                                      61. ftVerwendung_4 Off
                                                                                      62. ftNavigation Off
                                                                                      63. ftTaetigkeitsbereich Off
                                                                                      64. ftBemerkung
                                                                                      65. Michael Rehkamp Elster Kromschroumlder>btnSenden
Page 17: VAD, VAG, VAV, VAH, VRH, VCD, VCG, VCV, VCH · PDF fileVAD, VAG, VAH, VAV, VRH, VCD, VCG, VCV, VCH · Edition 04.15 6 VAD VAD VAS 1 .1 Examples of application 1 .1 .1 Constant pressure

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 17

Function

3 1 3 Flow rate regulators VAH VRHThe flow rate regulators VAH VRH control the gas flow rate depending on the variable air flow rate The ratio of gas flow rate to air flow rate remains constant If the burner operates at low-fire rate the gasair mixture can be changed by adjusting the zero point spring ldquoNrdquoIn addition flow rate regulator VAH is designed as a gas solenoid valve and shuts off the gas or air supply safely

psa

psa-

pd-

pdInternal feedback

Zero point setting N zero point spring

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 18

3 1 4 Variable airgas ratio control VAVThe servo regulator maintains a set constant outlet pressure pd The variable airgas ratio control VAV controls the outlet pressure pd depending on the variable air control pressure psa The ratio of gas pressure to air pressure remains constantThe settings N and V can be changed and read off from both sides of the unit using the adjusting screwsThe ratio of gas pressure to air pressure at low-fire rate can be changed by adjusting the zero point setting N By turning the adjusting screw ldquoNrdquo the force of the zero point spring and thus the zero point is changed by plusmn 15 mbar (06 WC) see page 34 (Project planning information)The high-fire rate is set by turning the adjusting screw ldquoVrdquo until the required flue gas values are achieved see page 34 (Project planning information) The ratio of gas pressure to air pressure can be set from 061 to 31The settings N and V influence each other and the adjustment process must be repeated if necessaryThe outlet pressure pd is applied to the servo diaphragm via the internal feedback The combustion chamber control pres-sure psc is transmitted to the space under the air and servo diaphragms via an impulse lineThe pressure differential psa - psc is achieved on the air diaphragm and the pressure differential pd - psc on the servo diaphragm This ensures that pressure fluctuations in the combustion cham-ber can be compensated The flue gas values remain constant in the case of fluctuations in the combustion chamber pressure (pd - psc) = (psa - psc) times V + N

Function

pdpsc

psa

Air diaphragm

Transmission ratio V

Zero point setting N zero point spring

Internalfeedback

Adjustment diaphragm

Servo diaphragm

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 19

1 COM

2 NO

3 NC

3 1 5 Pressure regulator with gas solenoid valve VAx S position indicator with visual indicatorOpening when the pressure regulator is opened the posi-tion indicator switches The visual indicator is activated The ldquoopenrdquo signal is marked in red The double valve seat opens to release the volume of gasClosing the pressure regulator VAx is disconnected from the voltage supply and the closing spring presses the double valve disc on to the valve seat The position indicator is actuated The visual indicator is white for ldquoclosedrdquoThe actuator cannot be rotated on a pressure regulator with a position indicator and a visual indicatorNOTE NFPA 86 ndash the following must be taken into account as soon as the capacity of the pilot or main burner exceeds 117 kW (400000 BTUh) safety shut-off valve VASS must be fitted with a proof of closure overtravel switch with a visual position indicator and the burner-side pressure regulator with gas solenoid valve VAxS must also be fitted with a position indicator with visual indicator The closed position can be verified using the proof of closure switch of the gas solenoid valve VASS

Function

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 20

3 2 AnimationThe interactive animation shows the function of the valVario controls VADVAGVAHVAVClick on the picture The animation can be controlled using the control bar at the bottom of the window (as on a DVD player) To play the animation you will need Adobe Reader 7 or a newer version If you do not have Adobe Reader on your system you can download it from the Internet

Go to wwwadobecom click on ldquoAdobe Readerrdquo at the bottom of the page and follow the instructionsIf the animation does not start to play you can download it from the document library (wwwdocuthekcom) as an inde-pendent application

Function

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 21

3 3 Connection diagramWiring to EN 60204-1Connection diagram for VAxS with position indicator ndash see page 19 (Pressure regulator with gas solenoid valve VAxS position indicator with visual indicator)

3 3 1 VAx with M20 cable gland

L1 (+)

N (ndash)

3 3 2 VAx with plug

1 = N (-)

2 = L1 (+)

3 3 3 VAS with VADVAGVAHVAV with M20 cable glandL1V1 (+)

N (-)

L1V2 (+)

3 3 4 VAS with VADVAGVAHVAV with plug2 = L1V1 (+)

1 = N (-)

3 = L1V2 (+)

Function

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 22

4 Replacement possibilities for MODULINE pressure regulators with gas solenoid valve4 1 GVS GVI GVIB GVR and GVRH are to be replaced by VAD VAG VAG+VAS VAH and VAV

Type TypeGVS Pressure regulator with gas solenoid valve Pressure regulator with gas solenoid valve VADGVI Airgas ratio control with gas solenoid valve Airgas ratio control with gas solenoid valve VAG

GVIB Airgas ratio control with gas solenoid valve and bypass valve

Airgas ratio control with gas solenoid valve and bypass valve VAG+VAS

GVRH Flow rate regulator with gas solenoid valve Flow rate regulator with gas solenoid valve VAHGVR Variable airgas ratio control with gas solenoid valve Variable airgas ratio control with solenoid valve VAV115125 Flange 38 Size 115

Size 125 on request

115125 Flange frac12 Size 115

Size 125 Size 1 DN 15 115

115125 Flange frac34 Size 115

Size 125 Size 1 DN 20 120

115125 Flange 1 Size 115

Size 125 Size 1 DN 25 125

232240 Flange 1 Size 232

Size 240 on request

232240 Flange 1frac12 Size 232

Size 240 Size 2 DN 40 240

350 Flange 1frac12 Size 350 on request350 Flange 2 Size 350 Size 3 DN 50 350ML MODULINE + Rp internal thread connection fl anges Rp internal thread RTML MODULINE + NPT internal thread connection fl anges NPT internal thread N01 pu max 100 mbar (15 psig) pu max 500 mbar (7 psig) 02 200 mbar (3 psig) 500 mbar (7 psig)

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 23

Replacement possibilities for MODULINE pressure regulators with gas solenoid valve gt GVS GVI GVIB GVR and GVRH are to be replaced by VAD VAG VAG+VAS VAH and VAV

ContinuationType Type

Quick opening Quick opening NF1 Control ratio 11 Control ratio 11 K Mains voltage 24 V DC Mains voltage 24 V DC K

ndash 100 V AC PQ 120 V AC 120 V AC Q

ndash 200 V AC YT 220240 V AC 230 V AC W3 Electrical connection via terminals Electrical connection via terminals 6 Electrical connection via socket Electrical connection via socket 9 Metal terminal connection box Electrical connection via terminals S Position indicator Position indicator with visual indicator SG Position indicator for 24 V Position indicator for 24 V with visual indicator GM Suitable for biologically produced methane Suitable for biologically produced methane

Pressure test point at the inlet Pressure test point at the inlet and outlet Outlet pressure pd -25

Outlet pressure pd 25 ndash 25 mbar (1 ndash 10 WC)

2 ndash 90 mbar (08 ndash 36 WC) 20 ndash 50 mbar (8 ndash 20 WC) -5035 ndash 100 mbar (14 ndash 40 WC) -100Standard seat A

ExampleGVS 350ML01T3with Rp 2 connection flanges

ExampleVAD 350RNW-100A

with test points

= standard = available Pressure test points may be attached at the left- andor right-hand side Position indicator with visual indicator can be attached at the left- or right-hand side

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 24

∆p [i

nch

WC]

Qn [SCFH]100 400 600 4000 60001000 200020 30 40 50 200 3006015 80

1

08

1

2

3

4

56

8

10

20

30

40

5060

80

100

200

∆p [m

bar]

5

8

3

20

10

30

40

80

60

300

400

50

04 06 1 2 3 4 5 808 10 20 30 402

03 60 100 200

100

200

500

1

3

2

04 06 08 1 2 3 4 5 6 8 10 20 30 40

04 06 08 1 2 3 4 5 6 8 10

200

80 10020 3003

03Qn [m3h]

02

50 60 80 100

40 50 60

VAD

115

B

VAD

120

AVA

D 12

5A

P1P2

VAD

240

AVA

D 35

0A

= natural gas (ρ = 080 kgm3) = propane (ρ = 201 kgm3) = air (ρ = 129 kgm3)

The characteristic flow rate curves have been meas-ured with the specified flanges and a fitted strainer If two or more valves are combined the pressure loss of each additional valve drops by approx 5

metric imperial

Enter densityFlow rate Qn

Inlet pressure pu

Outlet pressure pd

Product RV v

Pressure loss ∆p

∆pmin

5 Flow rate5 1 Selection example for VADNatural gas Flow rate Qmax = 30 m3h Inlet pressure pu = 80 mbar Outlet pressure pd = 60 mbarThe desired control ratio from high-fire to low-fire rate is RV = 101High fire ∆p = pu - pd = 20 mbar Point P1Low fire Point P2 Qmin = 26 m3h at ∆p = 20 mbar RV = Qmax Qmin = 1151

Point P1 and point P2 must be within the working range of a unit size We recommend that you select the smallest size to achieve the best control properties

5 1 1 Calculate VAD

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 25

∆p [i

nch

WC]

Qn [SCFH]100 400 600 4000 60001000 200020 30 40 50 200 3006015 80

1

08

1

2

3

4

56

8

10

20

30

40

5060

80

100

200

∆p [m

bar]

5

8

3

20

10

30

40

80

60

300

400

50

04 06 1 2 3 4 5 808 10 20 30 402

03 60 100 200

100

200

500

1

3

2

04 06 08 1 2 3 4 5 6 8 10 20 30 40

04 06 08 1 2 3 4 5 6 8 10

200

80 10020 3003

03Qn [m3h]

02

50 60 80 100

40 50 60

= pd min lt 5 mbar

VAG

VxH

VAV

115

BVA

GV

xHV

AV 12

0A

VAG

VxH

VAV

125

A

P1

P2

VAG

VxH

VAV

240

AVA

GV

xHV

AV 3

50A

= natural gas (ρ = 080 kgm3) = propane (ρ = 201 kgm3) = air (ρ = 129 kgm3)

The characteristic flow rate curves have been meas-ured with the specified flanges and a fitted strainer If two or more valves are combined the pressure loss of each additional valve drops by approx 5

5 2 Selection example for VAG VAH VRH VAV Natural gas Flow rate Qmax = 30 m3h Inlet pressure pu = 80 mbar Outlet pressure pd max VAG = 60 mbarThe desired control ratio from high-fire to low-fire rate is RV = 101High fire ∆p = pu - pd max = 20 mbar Point P1Low fire pd min = pd max RV2 = 06 mbar Qmin = Qmax RV = 3 m3h ∆p = pu - pd min = 794 mbar Point P2 select VAG 120APoint P1 and point P2 must be within the working range of a unit size We recommend that you select the smallest size to achieve the best control properties

metric imperial

Enter densityFlow rate Qn

Inlet pressure pu

Outlet pressure pd

Product RV v

5 2 1 Calculate VAG VxH VAV

Pressure loss ∆p

∆pmin

Flow rate

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 26

∆p [i

nch

WC]

Qn [SCFH]100 400 600 4000 60001000 200020 30 40 50 200 3006015 80

1

08

1

2

3

4

56

8

10

20

30

40

5060

80

100

200

∆p [m

bar]

5

8

3

20

10

30

40

80

60

300

400

50

04 06 2 3 4 5 808 10 20 30 402

03 60 100 200

100

200

500

1

3

2

04 06 08 1 2 3 4 5 6 8 10 20 30 40

04 06 08 1 2 3 4 5 6 8 10

200

80 10020 3003

03Qn [m3h]

02

50 60 80 100

40 50 60

VAG

115

N

P1VAG

125

N

VAG

120

N

VAG

240

NP2

VAG

350

N

= natural gas (ρ = 080 kgm3) = propane (ρ = 201 kgm3) = air (ρ = 129 kgm3)

The characteristic flow rate curves have been meas-ured with the specified flanges and a fitted strainer If two or more valves are combined the pressure loss of each additional valve drops by approx 5

5 3 Selection example for zero governor VAG NNatural gas Flow rate Qmax = 30 m3h Inlet pressure pu = 20 mbar Outlet pressure pd = 0 mbar (atmospheric pressure)The desired control ratio from high-fire to low-fire rate is RV = 101High fire ∆p = pu - pd max = 20 mbar Point P1Low fire Point P2 Qmin = 24 m3h at ∆p = 20 mbar RV = Qmax Qmin = 1231Point P1 and point P2 must be within the working range of a unit size We recommend that you select the smallest size to achieve the best control properties

metric imperial

Enter densityFlow rate Qn

Inlet pressure pu

Outlet pressure pd

Product RV

5 3 1 Calculate VAG N

Pressure loss ∆p

∆pmin

Flow rate

v

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 27

6 Selection6 1 Selection table for pressure regulator with solenoid valve VAD

Accessories right Accessories left

Type1) T R N F N K P Q Y W S2) G2) R2) L2) M20

cab

le g

land

Plug

with

soc

ket

Plug

with

out s

ocke

t

-25-50 -100 A B Scre

w p

lug

Pres

sure

test

poi

nt

DG

17V

C 3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

Scre

w p

lug

Pres

sure

test

poi

nt

DG

17V

C 3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

VAD 115

VAD 120

VAD 125

VAD 240

VAD 350

= standard = available1) The following nominal inlet fl ange diameters are also available size 1 with nominal diameter DN 10 size 2 with nominal diameters DN 25 DN 32 and DN 50 size 3 with nominal diameters DN 40 and DN 652) Position indicator and bypasspilot gas valve cannot be fi tted together on the same side3) Specify the test point for inlet pressure pu or outlet pressure pdHelp for selecting the pressure regulator VAD can be found on the ProFi DVD wwwkromschroedercom Products DVD Product fi nder ldquoProFirdquo

Order exampleVAD 240RNW-100A

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 28

Selection

6 2 Type code for VADCode DescriptionVAD Pressure regulator with solenoid valve1 ndash 3 SizeT T-product10 ndash 65 Nominal inlet and outlet diameterRNF

Rp internal threadNPT internal thread

ISO fl angeN Quick opening quick closingKPQYW

Mains voltage 24 V DCMains voltage 100 V AC 5060 HzMains voltage 120 V AC 5060 HzMains voltage 200 V AC 5060 HzMains voltage 230 V AC 5060 Hz

SG

Position indicator with visual indicatorPosition indicator for 24 V with visual indicator

RL

Viewed from the right (in the direction of fl ow)Viewed from the left (in the direction of fl ow)

-25-50-100

Outlet pressure pd 25 ndash 25 mbar20 ndash 50 mbar

35 ndash 100 mbarAB

Standard valve seatReduced valve seat

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 29

Selection

6 3 Selection table for airgas ratio control with solenoid valve VAG flow rate regulators VAH VRH

Type1) T R N F N K P Q Y W S2) G2) R2) L2) M20

cab

le g

land

Plug

with

soc

ket

Plug

with

out s

ocke

t

A B E K A N Scre

w p

lug

Pres

sure

test

poi

ntD

G 1

7VC

3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

Scre

w p

lug

Pres

sure

test

poi

ntD

G 1

7VC

3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

VAG 115 VAG 120 VAG 125 VAG 240 VAG 350

VAH 115 VAH 120 VAH 125 VAH 240 VAH 350

VRH 115 VRH 120 VRH 125 VRH 240 VRH 350

= standard = available1) The following nominal inlet fl ange diameters are also available size 1 with nominal diameter DN 10 size 2 with nominal di-

ameters DN 25 DN 32 and DN 50 size 3 with nominal diameters DN 40 and DN 652) Position indicator and bypasspilot gas valve cannot be fi tted together on the same side3) Specify the test point for inlet pressure pu or outlet pressure pdHelp for selecting the regulators can be found on the ProFi DVD wwwkromschroedercom Products DVD Product fi nder ldquoProFirdquo

Order exampleVAG 240RNWAE

Accessories right Accessories left

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 30

Selection

6 4 Type code for VAG VAH VRHCode DescriptionVAGVAHVRH

Airgas ratio control with solenoid valveFlow rate regulator with solenoid valve

Flow rate regulator1 ndash 3 SizeT T-product15 ndash 50 Nominal inlet and outlet diameterRNF

Rp internal threadNPT internal thread

ISO fl angeN1) Quick opening quick closingK1)

P1)

Q1)

Y1)

W1)

Mains voltage 24 V DCMains voltage 100 V AC 5060 HzMains voltage 120 V AC 5060 HzMains voltage 200 V AC 5060 HzMains voltage 230 V AC 5060 Hz

S1)

G1)Position indicator with visual indicator

Position indicator for 24 V with visual indicatorRL

Viewed from the right (in the direction of fl ow)Viewed from the left (in the direction of fl ow)

AB

Standard valve seatReduced valve seat

EKAN

Connection kit for air control pressure psaVAG VAH VRH compression fi tting

VAG plastic hose couplingVAG VAH VRH NPT 18 adapter

VAG zero governor1) Only available for VAG VAV VAH

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 31

6 5 Selection table for variable airgas ratio control with solenoid valve VAVAccessories right Accessories left

Type1) T R N F N K P Q Y W S2) G2) R2) L2) M20

cab

le g

land

Plug

with

soc

ket

Plug

with

out s

ocke

t

A B E K A Scre

w p

lug

Pres

sure

test

poi

ntD

G 1

7VC

3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

Scre

w p

lug

Pres

sure

test

poi

ntD

G 1

7VC

3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

VAV 115

VAV 120

VAV 125

VAV 240

VAV 350

= standard = available1) The following nominal inlet fl ange diameters are also available size 1 with nominal diameter DN 10 size 2 with nominal diameters DN 25 DN 32 and DN 50 size 3 with nominal diameters DN 40 and DN 652) Position indicator and bypasspilot gas valve cannot be fi tted together on the same side3) Specify the test point for inlet pressure pu or outlet pressure pdHelp for selecting the variable airgas ratio control VAV can be found on the ProFi DVD wwwkromschroedercom

Products DVD Product fi nder ldquoProFirdquo

Order exampleVAV 240RNWAK

Selection

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 32

Selection

6 6 Type code for VAVCode DescriptionVAV Variable airgas ratio control with solenoid valve1 ndash 3 SizeT T-product15 ndash 50 Nominal inlet and outlet diameterRNF

Rp internal threadNPT internal thread

ISO fl angeN Quick opening quick closingKPQYW

Mains voltage 24 V DCMains voltage 100 V AC 5060 HzMains voltage 120 V AC 5060 HzMains voltage 200 V AC 5060 HzMains voltage 230 V AC 5060 Hz

SG

Position indicator with visual indicatorPosition indicator for 24 V with visual indicator

RL

Viewed from the right (in the direction of fl ow)Viewed from the left (in the direction of fl ow)

AB

Standard valve seatReduced valve seat

EKA

Connection kit for air control pressure psa and combus-tion chamber control pressure psc

compression fi ttingplastic hose coupling

NPT 18 adapter

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 33

Selection

6 7 AccessoriesModularly configurable withndash Screw plugsndash Pressure test pointsndash Pressure switch DGVC for inlet

andor outlet pressurendash Tightness control TCndash Bypasspilot gas valve VBY 8 for

size 1ndash Bypasspilot gas valve VAS 1For further information see page 37 (Accessories)

Position indicator

Plug with socket

Plug

Screwplugs

Pressuretest points

Pressure switch DGC Tightness

control TC

Bypasspilot gas valve VBY 8 for size 1

Bypasspilot gas valve VAS 1

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 34

7 Project planning informationDo not store or install the unit in the open airThe inlet pressure pu and the outlet pressure pd can be meas-ured on both sides of the valve body To increase the control accuracy an external impulse line can be connected instead of the pressure test point pd

VAD

pu

pd

(psa)

VAGpd

pu

psa

psa

VAD measurement point for the gas outlet pressure pd on the regulator body A combustion chamber control line (psc) can be connected to connection psa for maintaining a constant burner capacityVAG additional measurement point for the air control pressure psa on the regulator body

VAV

psapsc

pu

pd

VAH VRH

pu

pd-

pdpsa-

psa

VAV measurement point for the outlet pressure pd on the regulator bodyVAH additional measurement points for the outlet pressure pd- and the air control pressure psapsa- on the regulator body

7 1 Installation

GFK

VAGVAH

GFKVAD

Sealing material and thread cuttings must not be allowed to get into the valve housing Install a filter upstream of every system

gt20 mmgt0 79

The unit must not be in contact with masonry Minimum clear-ance 20 mm (079 inches)Ensure that there is sufficient space for installation and ad-justment

le +100 degCle +212 degF

The solenoid body heats up during operation ndash depending on ambient temperature (max 60degC140degF) and intrinsic heating (approx 40degC104degF)

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 35

In the case of double solenoid valves the position of the con-nection box can only be changed by removing the actuator and reinstalling it offset by 90deg or 180deg

If more than three valVario controls are installed in line the controls must be supported

The seals in some gas compression fittings are approved for temperatures of up to 70degC (158degF) This temperature limit will not be exceeded if the flow through the pipe is at least 1 msup3h (3531 SCFH) of gas and the maximum ambient temperature is 50degC (122degF)

7 1 1 Installation position

pu ge 80 mbar(80 hPa32 WC)

VAD VAG VAH VRH VAV

In humid environments black solenoid actuator in the vertical upright position only

VAD VAG VAH VRH black solenoid actuator in the vertical upright position or tilted up to the horizontal not upside downVAG VAH horizontal position only if pu ge 80 mbar (32 WC))VAV installation in the vertical position only black solenoid actuator in the vertical upright positionTo ensure that the airgas ratio control VAG the flow rate regulator VAH VRH or the variable airgas ratio control VAV can react quickly when the load is changed the impulse line for the air control pressure psa and for VAV the impulse line for the combustion chamber control pressure psc should be kept as short as possible The tube internal diameter for the impulse line must always be ge 39 mm (015)

VAH VRHIt is not permitted to install a gas solenoid valve VAS down-stream of flow rate regulator VAH VRH and upstream of fine-adjusting valve VMV The VAS would no longer be able to perform its function as a second safety valve if installed in the above-mentioned position

M

VMV

VAH

VASVAS

pd-

psa-psa

VMV

VAH pd-

psa-psa

The measuring orifice in the air line for impulse lines psa and psa- must always be installed downstream of the air control valve

Project planning information gt Installation

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 36

VAVThe impulse line for the combustion chamber control pres-sure psc must be fitted so that no condensation can enter the pressure regulator but rather flows back into the combustion chamber

7 2 Setting the low-fire rate on VAG VAH VRH VAV

-10 +05-05

ndash

+1

-15

mbar

+15

06

1 152

3

N V

+ +ndash

+30 -15+15

ndash

-3

+5

mbar

-5

N

+

VAG VAH VRH VAV

If the burner operates at low-fire rate the gasair mixture can be changed using the parallel shift of the characteristic curve by turning the adjusting screw ldquoNrdquoAdjusting range at low fire VAG VAH VRH -5 to +5 mbar (-195 to +195 WC) VAV -15 to +15 mbar (-06 to +06 WC)

7 3 Setting the high-fire rate on VAVTo set the high-fire rate the transmission ratio is changed us-ing the adjusting screw ldquoVrdquo until the required flue gas values are achievedTransmission ratio V = pdpsa = 061 to 31The settings N and V can influence each other and must be repeated if necessary

+N+V

-V

-N

VAV

psa [mbar]

p d [m

bar]

7 3 1 CalculationWith no connection to the combustion chamber control pres-sure psc pd = V times psa + NWith connection to the combustion chamber control pressure psc (pd - psc) = V times (psa - psc) + N

Project planning information

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 37

pu pd

21579

4836

085310

189

142

8 Accessories8 1 Gas pressure switch DG VC for VAx VRHType Adjusting range [mbar]DG 17VC 2 to 17DG 40VC 5 to 40DG 110VC 30 to 110DG 300VC 100 to 300

Scope of delivery 1 times pressure switch for gas 2 times retaining screws 2 times sealing rings

8 2 Gas pressure switch DG VCT for VAx T VRH TType Adjusting range [WC]DG 17VCT 08 to 68DG 40VCT 2 to 16DG 110VCT 12 to 44DG 300VCT 40 to 120

Scope of delivery 1 times gas pressure switch with AWG 18 connection wires 2 times retaining screws 2 times sealing ringsMonitoring the inlet pressure pu the electrical plug of the pressure switch for gas points towards the inlet flangeMonitoring the outlet pressure pd the electrical plug of the pressure switch for gas points towards the outlet flange

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 38

A BC

D

FE

ACD

F

B

E

8 3 Bypass valvepilot gas valve VAS 18 3 1 VAS 1 attached to VADVAGVAHVAV 1Scope of delivery A 1 times bypasspilot gas valve VAS 1 B 4 times O-rings C 4 times double nuts D 4 times connection parts E 1 times mounting aidBypass valve VAS 1 F 2 times connection pipes if the bypass valve has a blind flange

at the outlet sidePilot gas valve VAS 1 F 1 times connection pipe 1 times sealing plug if the pilot gas valve

has a threaded flange at the outlet side

Accessories

8 3 2 VAS 1 attached to VADVAGVAHVAV 2 VADVAGVAHVAV 3Scope of delivery A 1 times bypasspilot gas valve VAS 1 B 4 times O-rings C 4 times spacer sleeves D 4 times connection parts E 1 times mounting aidBypass valve VAS 1 F 2 times connection pipes if the bypass valve has a blind flange

at the outlet sidePilot gas valve VAS 1 F 1 times connection pipe 1 times sealing plug if the pilot gas valve

has a threaded flange at the outlet side

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 39

2

3

456

810

20

30

405060

80100

∆p [m

bar]

005 01 02 03 05 08 1 2 3 4 51

3

2

Qn [m3h]

1

01

02

03

0405

08

003

002

6 8 10

005 01 02 03 05 08 1 2 3 4 5003 6 8 10

20

005 01 02 03 05 08 1 2 3 4 5003 6 8 10 20

30

∆p [i

nch

WC]

1

2

3

456

810

20

30

40

04

004

006

00801

02

03

0506

08

Qn [SCFH]10 40 60 100 200 3001 500 10002 3 4 5

120 306 8

21 3 4 5 6 7 8 910

8 3 3 Flow rate

The characteristic flow rate curves have been measured for bypass valve VAS 1 with connection pipe diameter 1 to 10 mm (004 to 04) and for the pilot gas valve with 10 mm (04) connection pipe

Bypass valve connection pipe diameter [mm]

Pilo

t gas

val

ve 1

0 m

m (0

4)

conn

ectio

n pi

pe d

iam

eter

Accessories gt Bypass valvepilot gas valve VAS 1

= natural gas (ρ = 080 kgm3) = propane (ρ = 201 kgm3) = air (ρ = 129 kgm3)

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 40

Accessories

8 4 Bypass valvepilot gas valve VBY 8 for VADVAGVAHVAV 1

B

C

AVBY 8

VAx 1

55

(217)40(157)

70 (276)

80(315)

Rp frac14(pilot gas valve)

For mounting on VAD VAG VAH VAV 1 and double solenoid valve VCD VCG VCH VCV 1

8 4 1 Scope of delivery VBY 8I as bypass valveA 1 times bypass valve VBY 8IB 2 times retaining screws with 4 times O-rings both retaining screws

have a bypass orificeC 1 times grease for o-rings

8 4 2 Scope of delivery VBY 8R as pilot gas valveA 1 times pilot gas valve VBY 8RB 2 times retaining screws with 5 x O-rings one retaining screw

has a bypass orifice (2 x O-rings) the other does not (3 x O-rings)

C 1 times grease for O-rings

8 4 3 SelectionType I R W Q K 6L -R -L E B D 05

VBY 8

Order exampleVBY 8RW6L-LED

8 4 4 Type codeCode DescriptionVBY Gas solenoid valve8 Nominal sizeIR

For internal gas pick-up as bypass valveFor external gas pick-up as pilot gas valve

KQW

Mains voltage 24 V DC Mains voltage 120 V AC 5060 HzMains voltage 230 V AC 5060 Hz

6L Electrical connection via plug and socket with LED-R-L

Attachment side of main valve right-hand sideAttachment side of main valve left-hand side

EB

Attached to the VAxEnclosed (separate packing unit)

05D

Nozzle diameter = 05 mm (002)Flow adjustment

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 41

2

01

02

03

05

081

3

456

810

20

30

405060

80100

∆p [m

bar]

1

3

201 02 03 05 1 2 3001 003 4

Qn [m3h]

02 03 05 1 2

01 02 05

002 006

002

002 006 1

0010006 005 01

001

0003

0006 2 3

VBY 8DVBY 805

∆p [i

nch

WC]

1

2

3

456

810

20

30

40

040506

08

1

Qn [SCFH]10 40 60 1005 2081 2 30402

01

02

03

004005006

008

Adjusting range

8 4 5 Flow rateVBY 8 D

+

-

The flow rate can be set by turning the flow rate restrictor (4 mm016 Allen screw) frac14 of a turn Flow rate 10 to 100

VBY 8 05The flow is routed through a 05 mm (002) nozzle and thus has a fixed characteristic flow rate curve Adjustment is not possible

8 4 6 Technical dataInlet pressure pu max 500 mbar (7 psig)Ambient temperature 0 to +60degC (32 to 140degF) no condensation permittedStorage temperature 0 to +40degC (32 to 104degF) no condensation permittedPower consumption 24 V = 8 W 120 V = 8 W 230 V = 95 WEnclosure IP 54

Accessories gt Bypass valvepilot gas valve VBY 8 for VADVAGVAHVAV 1

= natural gas (ρ = 080 kgm3) = propane (ρ = 201 kgm3) = air (ρ = 129 kgm3)

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 42

TC 116VB C

56(22)

49(193)

27(106)

A

A

VCx 1 VCx 2VCx 3

8 5 Tightness control TC 116Vfor VAx 1 ndash 3An adapter plate is required to attach the tightness control to the right- or left-hand side of the pressure regulator with gas solenoid valveScope of delivery A 1 times adapter plate B 2 times O-rings C 2 times retaining screwsFor attachment to left-hand side Order No 74922391 right-hand side Order No 74921995

8 6 Pressure test pointsTest points to check the inlet pressure pu and outlet pressure pdScope of delivery 1 x pressure test points with 1 x profiled sealing rings Order No 74923390

8 7 Cable gland setWhen wiring a double solenoid valve with pressure regula-tor VCx the connection boxes are to be connected using a cable gland setThe cable gland set can only be used if the connection boxes are at the same height and on the same side and if both valves are equipped either with or without a proof of closure switchVA 1 Order No 74921985 VA 2 Order No 74921986 VA 3 Order No 74921987

Accessories

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 43

A B

D

C

Accessories

8 9 Differential pressure orifice

Size PipeDN

Differential pressure orifi cewith outlet dia

1 15 17 mm 0671 20 25 mm 0981 25 30 mm 1182 40 46 mm 1813 50 58 mm 228

If pressure regulator VADVAGVAV 1 is retrofitted upstream of gas solenoid valve VAS 1 a DN 25 differential pressure orifice with outlet opening d = 30 mm (118) must be inserted at the outlet of the pressure regulatorIn the case of pressure regulator VAx 115 or VAx 120 the DN 25 differential pressure orifice must be ordered separately and retrofitted Order No 74922240

8 8 Seal set VA 1 ndash 3VA 1 Order No 74921988 VA 2 Order No 74921989 VA 3 Order No 74921990Scope of deliveryA 1 times double block seal B 2 times O-rings (flange) C 2 times O-rings (pressure switch) for pressure test pointscrew plug D 2 times sealing rings (flat sealing) and 2 times profiled sealing rings

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 44

BA

C

pd-

8 11 Attachment blockFor locked installation of pressure gauge and other acces-soriesScope of delivery A 1 times attachment block B 2 times self-tapping screws for installation C 2 times O-rings

Accessories

8 10 Retaining frameIn the event that a pressure regulator VAx is installed at a later point upstream of a gas solenoid valve VAS a measur-ing orifice VMO or a fine-adjusting valve VMV the retaining frame must be fitted at the inlet of the second device in order to fasten the differential pressure orifice at the regulator outlet Order the retaining frame separatelyRetaining frame for Size 1 Order No 74923029 Size 2 Order No 74923030 Size 3 Order No 74923031

8 12 Gas control lineFine-adjusting valve VMV can be installed on the flow rate regulator VAH for fine adjustment of the gas flow rateThe gas control line for gas outlet pressure pd- is available with 2 18 compression fittingsSize 1 Order No 74924458 Size 2 Order No 74924459

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 45

8 13 Measuring orifice VMOThe measuring orifice VMO is designed to reduce the gas and air flow rates and is installed downstream of the valVario control The measuring orifice is available with Rp internal thread (NPT internal thread) or flange to ISO 7005See wwwdocuthekcom Elster Kromschroumlder Krom-schroumlder LBE Products 03 Valves and butterfly valves valVario accessories Type of document Technical Informa-tion VMO

Accessories

8 14 Filter module VMFUsing the filter module VMF the gas flow upstream of the gas solenoid valve VAS and the airgas ratio control is cleaned The filter module is available with Rp internal thread (NPT internal thread) or flange to ISO 7005 and can also be supplied with fitted pressure switch as an optionSee wwwdocuthekcom Elster Kromschroumlder Krom-schroumlder LBE Products 03 Valves and butterfly valves valVario accessories Type of document Technical Informa-tion VMF

8 15 Fine-adjusting valve VMVThe flow rate is set using the fine-adjusting valve VMV The fine-adjusting valve is available with Rp internal thread (NPT internal thread) or flange to ISO 7005See wwwdocuthekcom Elster Kromschroumlder Krom-schroumlder LBE Products 03 Valves and butterfly valves valVario accessories Type of document Technical Infor-mation VMV

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 46

9 Technical dataGas types natural gas LPG (gaseous) biologically produced methane (max 01 -by-vol H2S) or clean air other gases on request The gas must be clean and dry in all temperature conditions and must not contain condensateCE and FM approved UL listed max inlet pressure pu 10 ndash 500 mbar (4 ndash 200 WC) FM approved (230 V AC 120 V AC 24 V DC) non opera-tional pressure 700 mbar (10 psig)ANSICSA approved (230 V AC 120 V AC 24 V DC) up to 350 mbar (5 psig)Opening time of the solenoid valve quick opening le 05 s Closing time quick closing lt 1 sMedium and ambient temperatures -20 to +60degC (-4 to +140degF) no condensation permittedStorage temperature -20 to +40degC (-4 to +104degF)Enclosure IP 65Valve housing aluminium valve seal NBRConnection flanges with internal thread Rp to ISO 7-1 NPT to ANSIASMESafety valve Class A to EN 161 Factory Mutual Research Class 7400 Process Control Valves (230 V AC 120 V AC 24 V DC) ANSI Z2121 and CSA 65 ANSI Z2118 and CSA 63Control class A to EN 88-1Control range up to 101

Mains voltage 230 V AC +10-15 5060 Hz 200 V AC +10-15 5060 Hz 120 V AC +10-15 5060 Hz 100 V AC +10-15 5060 Hz 24 V DC plusmn20Duty cycle 100Power factor of the solenoid coil cos φ = 09Power consumption

Type Voltage Power

VAx 1

24 V DC 25 W ndash100 V AC 25 W (26 VA)120 V AC 25 W (26 VA)200 V AC 25 W (26 VA)230 V AC 25 W (26 VA)

VAx 2 VAx 3

24 V DC 36 W ndash100 V AC 36 W (40 VA)120 V AC 40 W (44 VA)200 V AC 40 W (44 VA)230 V AC 40 W (44 VA)

VBY24 V DC 8 W ndash

120 V AC 8 W ndash230 V AC 95 W ndash

Cable gland M20 times 15Electrical connection cable with max 25 mm2 (AWG 12) or plug with socket to EN 175301-803

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 47

Position indicator contact rating

Type Voltage Min current(resistive load)

Max current(resistive load)

VAxS VCxS 12 ndash 250 V AC 5060 Hz 100 mA 3 AVAxG VCxG 12 ndash 30 V DC 2 mA 01 A

Position indicator switching frequency max 5 times per minute

Switching current [A]

Switching cyclescos φ = 1 cos φ = 06

01 500000 50000005 300000 250000

1 200000 1000003 100000 ndash

Limited to max 200000 cycles for heating systems

9 1 VADOutlet pressure pd VAD-25 25 ndash 25 mbar (1 ndash 10 WC) VAD-50 20 ndash 50 mbar (8 ndash 20 WC) VAD-100 35 ndash 100 mbar (14 ndash 40 WC)Combustion chamber control pressure psc (connection psa)

-20 to +20 mbar (-78 to +78 WC)

VAD

pu

pd

(psa)

9 2 VAGOutlet pressure pd 05 ndash 100 mbar (02 ndash 40 WC)Air control pressure psa 05 ndash 100 mbar (02 ndash 40 WC)

Adjusting range at low fire plusmn5 mbar (plusmn2 WC)Transmission ratio of gas to air 11The inlet pressure must always be higher than the air control pressure psa + pressure loss ∆p + 5 mbar (2 WC)

VAGpd

pu

psa

psa

VAGK 1 x 18 coupling for plastic hose (internal dia 39 mm (015) external dia 61 mm (024)) or VAGE 1 x 18 compression fitting for 6 times 1 tube or VAGA 1 x NPT 18 adapter or VAGN zero governor with breathing orifice

9 3 VAH VRHAir control pressure psa 06 ndash 100 mbar (024 ndash 40 WC) Differential air pressure ∆psa (psa - psa-) 06 ndash 50 mbar (024 ndash 197 WC) Differential gas pressure ∆pd (pd - pd-) 06 ndash 50 mbar (024 ndash 197 WC)Transmission ratio of gas to air 11The inlet pressure must always be higher than the differen-tial air pressure ∆psa + pressure loss ∆p + max gas pres-sure on burner + 5 mbar (2 WC)Adjusting range at low fire plusmn5 mbar (plusmn2 WC)

Technical data

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 48

VAHVRH

pd-

pu

psa-

psa

Connection of the air control pressure psaVAHE VRHE 3 x 18 compression fitting for 6 times 1 tube or VAHA VRHA 3 x NPT 18 adapter

9 4 VAVOutlet pressure pd 05 ndash 30 mbar (02 ndash 117 WC)Air control pressure psa 04 ndash 30 mbar (015 ndash 117 WC)Combustion chamber control pressure psc

-20 to +20 mbar (-78 to +78 WC)Min control pressure differential psa - psc 04 mbar (015 WC)Min pressure differential pd - psc 05 mbar (02 WC)Adjusting range at low fire plusmn15 mbar (plusmn06 WC)Transmission ratio of gas to air 061 to 31The inlet pressure pu must always be higher than the air control pressure psa times transmission ratio V + pressure loss ∆p + 15 mbar (06 WC)

pu

pd psapsc

VAV

VAVK 2 x plastic hose couplings (internal dia 39 mm (015) external dia 61 mm (024)) or VAVE 2 x 18 compression fitting for 6 times 1 tube or VAVA 2 x NPT 18 adapter

Technical data

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 49

9 5 Safety-specific characteristic values for VAx 1 ndash 3For SILSuitable for Safety Integrity Level SIL 1 2 3

Diagnostic coverage DC 0

Type of subsystem Type A to EN 61508-2 74312

Operating mode High demand mode pursu-ant to EN 61508-4 3512

For PLSuitable for Performance Level PL a b c d e

Category B 1 2 3 4Common cause failure CCF gt 65Application of essential safety requirements Satisfied

Application of tried-and-tested safety requirements Satisfied

For SIL and PL

B10d value

Operating cyclesVAD VAG VAV VAH 1 10094360VAD VAG VAV VAH 2 8229021VAD VAG VAV VAH 3 6363683

Hardware fault tolerance (1 valve) HFT 0

Hardware fault tolerance (2 valves) HFT 1

Safe failure fraction SFF gt 90Fraction of undetected com-mon cause failures β ge 2

Max service life under operating conditions10 years after date of production plus max 12 year in stor-age prior to first use or once the given number of operating cycles has been reached depending on which is achieved firstThe devices are suitable for single-channel systems (HFT = 0) up to SIL 2PL d and up to SIL 3PL e when two re-dundant valves are installed in a double-channel architecture (HFT = 1) provided that the complete system complies with the requirements of EN 61508ISO 13849

For a glossary of terms see page 53 (Glossary)

Technical data

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 50

nop 1hnop 1a

sB10d

T10d aPFHD (1 VAx) 1h

PFHD (2 VAx) 1h

PFDavg (1 VAx)

PFDavg (2 VAx)

Technical data gt Safety-specific characteristic values for VAx 1 ndash 3

9 5 1 Determining the PFHD value the λD value and the MTTFd value

PFHD = λD = x nop= 1MTTFd

01B10d

PFDavg = x λD x 24 x 365 x T10d 12

Type

Cycle time

suitable for

suitable for

PFHD = Probability of dangerous failure (HDM = high de-mand mode) [1hour]PFDavg = Average probability of dangerous failure on de-mand (LDM = low demand mode)λD = Mean dangerous failure rate [1hour]MTTFd = Mean time to dangerous failure [hours]nop = Demand rate (mean number of annual operations) [1hour]

9 5 2 Calculating the PFHD and PFDavg

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 51

VAD VAG VAH VAV

H1

Rp frac14(NPT frac14)

H2

E

LF

F

H4

H3

B

VAxS VAxF

L2G

G

Technical data

9 6 Dimensions

Type

Connec-tion Dimensions

WeightRpNPT DN

L L2 E F G H1 H2 H3 H4 Bmm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch kg lbs

VAx 115 12 15 75 29 ndash ndash 75 29 15 06 ndash ndash 143 56 82 32 161 63 117 46 97 38 18 40VAH 115 12 15 75 29 ndash ndash 75 29 15 06 ndash ndash 143 56 100 39 161 63 135 53 97 38 2 44VAx 120 34 20 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 82 33 161 63 117 46 97 38 19 42VAH 120 34 20 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 100 39 161 63 135 53 97 38 21 46VAx 125 1 25 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 82 33 161 63 117 46 97 38 19 42VAH 125 1 25 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 100 39 161 63 135 53 97 38 21 46VAx 240 112 40 128 50 200 79 85 33 29 11 66 26 170 67 112 44 191 75 162 64 125 49 44 97VAH 240 112 40 128 50 200 79 85 33 29 11 66 26 170 67 132 52 191 75 182 72 125 49 47 104VAx 350 2 50 155 61 230 91 85 33 36 14 74 29 180 70 135 53 201 79 196 77 160 63 61 134VAH 350 2 50 155 61 230 91 85 33 36 14 74 29 180 70 156 61 201 79 217 85 160 63 64 141

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 52

10 Converting unitssee wwwadlatusorg

11 Maintenance cyclesAt least once per annum at least twice per annum for biologi-cally produced methaneIf the flow rate drops clean the strainer

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 53

12 Glossary12 1 Diagnostic coverage DCMeasure of the effectiveness of diagnostics which may be determined as the ratio between the failure rate of detected dangerous failures and the failure rate of total dangerous failuresNOTE Diagnostic coverage can exist for the whole or parts of a safety-related system For example diagnostic cover-age could exist for sensors andor logic system andor final elements Unit see EN ISO 13849-12008

12 2 Mode of operationHigh demand mode or continuous modeOperating mode where the frequency of demands for opera-tion made on a safety-related system is greater than one per year or greater than twice the proof-test frequencysee EN 61508-42008

12 3 CategoryClassification of the safety-related parts of a control system in respect of their resistance to faults and their subsequent behaviour in the fault condition and which is achieved by the structural arrangement of the parts fault detection andor by their reliability see EN ISO 13849-12008

12 4 Common cause failure CCFFailures of different items resulting from a single event where these failures are not consequences of each othersee EN ISO 13849-12008

12 5 Fraction of undetected common cause failures β Fraction of undetected failures of redundant components due to a single event whereby these failures are not based on mutual causesNOTE β is expressed as a fraction in the equations and as a percentage elsewheresee EN 61508-62010

12 6 B10d valueMean number of cycles until 10 of the components fail dan-gerouslysee EN ISO 13849-12008

12 7 T10d valueMean time until 10 of the components fail dangerouslysee EN ISO 13849-12008

12 8 Hardware fault tolerance HFTA hardware fault tolerance of N means that N + 1 is the mini-mum number of faults that could cause a loss of the safety functionsee IEC 61508-22010

12 9 Mean dangerous failure rate λD Mean rate of dangerous failures during operation time (T10d) Unit 1hsee EN ISO 13849-12008

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 54

12 10 Safe failure fraction SFFFraction of safe failures related to all failures which are as-sumed to appearsee EN 13611A22011

12 11 Probability of dangerous failure PFHD Value describing the likelihood of dangerous failure per hour of a component for high demand mode or continuous mode Unit 1hsee EN 13611A22011

12 12 Mean time to dangerous failure MTTFd Expectation of the mean time to dangerous failuresee EN ISO 13849-12008

12 13 Demand rate nop Mean number of annual operationssee EN ISO 13849-12008

12 14 Average probability of dangerous failure on demand PFDavg (LDM = 1 ndash 10 switching cyclesyear)Average probability of a dangerous failure of the safety function on demand (LDM = low demand mode)see EN 61508-6

Glossary

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415

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Remarks

(Adobe Reader 7 or higher required) wwwadobecom

Elster GmbH Postfach 2809 middot 49018 Osnabruumlck Strotheweg 1 middot 49504 Lotte (Buumlren) GermanyT +49 541 1214-0 F +49 541 1214-370 infokromschroedercomwwwkromschroedercom

The current addresses of our international agents are available on the Internetwwwkromschroederdeindexphpid=718ampL=1

We reserve the right to make technical modifications in the interests of progressCopyright copy 2015 Elster GmbH All rights reserved

Contact

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0325

0530

  • Pressure regulators with solenoid valve VAD VAG VAV VAH
  • Flow rate regulator VRH
  • Pressure regulators with double solenoid valve VCD VCG VCV VCH
  • Contents
  • 1 Application
    • 11 Examples of application
      • 111 Constant pressure control
      • 112 Constant pressure control with two gas solenoid valves
      • 113 Constant pressure control with max pressure switch
      • 114 Constant pressure control with non-controlled pilot gas outlet
      • 115 Modulating control
      • 116 Modulating control with two gas solenoid valves
      • 117 Modulating control with two gas solenoid valves and inlet pressure switch
      • 118 HighLow control
      • 119 Zero pressure control
      • 1110 Staged flow rate control
      • 1111 Continuous or staged flow rate control
      • 1112 Modulating control with variable airgas ratio control with gas solenoid valve
      • 1113 Modulating control in residential heat generation
          • 2 Certification
          • 3 Function
            • 31 VAD VAG VAH VRH VAV
              • 311 Pressure regulator for gas VAD
              • 312 Airgas ratio control VAG
              • 313 Flow rate regulators VAH VRH
              • 314 Variable airgas ratio control VAV
              • 315 Pressure regulator with gas solenoid valve VAxS position indicator with visual indicator
                • 32 Animation
                • 33 Connection diagram
                  • 331 VAx with M20 cable gland
                  • 332 VAx with plug
                  • 333 VAS with VADVAGVAHVAV with M20 cable gland
                  • 334 VAS with VADVAGVAHVAV with plug
                      • 4 Replacement possibilities for MODULINE pressure regulators with gas solenoid valve
                        • 41 GVS GVI GVIB GVR and GVRH are to be replaced by VAD VAG VAG+VAS VAH and VAV
                          • 5 Flow rate
                            • 51 Selection example for VAD
                              • 511 Calculate VAD
                                • 52 Selection example for VAG VAH VRH VAV
                                  • 521 CalculateVAG VxHVAV
                                    • 53 Selection example for zero governor VAGN
                                      • 531 Calculate VAGN
                                          • 6 Selection
                                            • 61 Selection table for pressure regulator with solenoid valve VAD
                                            • 62 Type code for VAD
                                            • 63 Selection table for airgas ratio control with solenoid valve VAG flow rate regulators VAH VRH
                                            • 64 Type code for VAG VAH VRH
                                            • 65 Selection table for variable airgas ratio control with solenoid valve VAV
                                            • 66 Type code for VAV
                                            • 67 Accessories
                                              • 7 Project planning information
                                                • 71 Installation
                                                  • 711 Installation position
                                                    • 72 Setting the low-fire rate on VAG VAH VRH VAV
                                                    • 73 Setting the high-fire rate on VAV
                                                      • 731 Calculation
                                                          • 8 Accessories
                                                            • 81 Gas pressure switch DGVC for VAx VRH
                                                            • 82 Gas pressure switch DGVCT for VAxT VRHT
                                                            • 83 Bypass valvepilot gas valve VAS 1
                                                              • 831 VAS 1 attached to VADVAGVAHVAV 1
                                                              • 832 VAS 1 attached to VADVAGVAHVAV 2 VADVAGVAHVAV 3
                                                              • 833 Flow rate
                                                                • 84 Bypass valvepilot gas valve VBY 8 for VADVAGVAHVAV 1
                                                                  • 841 Scope of delivery VBY 8I as bypass valve
                                                                  • 842 Scope of delivery VBY 8R as pilot gas valve
                                                                  • 843 Selection
                                                                  • 844 Type code
                                                                  • 845 Flow rate
                                                                  • 846 Technical data
                                                                    • 85 Tightness control TC 116V
                                                                    • 86 Pressure test points
                                                                    • 87 Cable gland set
                                                                    • 88 Seal set VA 1thinspndashthinsp3
                                                                    • 89 Differential pressure orifice
                                                                    • 810 Retaining frame
                                                                    • 811 Attachment block
                                                                    • 812 Gas control line
                                                                    • 813 Measuring orifice VMO
                                                                    • 814 Filter module VMF
                                                                    • 815 Fine-adjusting valve VMV
                                                                      • 9 Technical data
                                                                        • 91 VAD
                                                                        • 92 VAG
                                                                        • 93 VAH VRH
                                                                        • 94 VAV
                                                                        • 95 Safety-specific characteristic values for VAx 1thinspndashthinsp3
                                                                          • 951 Determining the PFHD value the λD value and the MTTFd value
                                                                          • 952 Calculating the PFHD and PFDavg
                                                                            • 96 Dimensions
                                                                              • 10 Converting units
                                                                              • 11 Maintenance cycles
                                                                              • 12 Glossary
                                                                                • 121 Diagnostic coverage DC
                                                                                • 122 Mode of operation
                                                                                • 123 Category
                                                                                • 124 Common cause failure CCF
                                                                                • 125 Fraction of undetected common cause failures β
                                                                                • 126 B10d value
                                                                                • 127 T10d value
                                                                                • 128 Hardware fault tolerance HFT
                                                                                • 129 Mean dangerous failure rate λD
                                                                                • 1210 Safe failure fraction SFF
                                                                                • 1211 Probability of dangerous failure PFHD
                                                                                • 1212 Mean time to dangerous failure MTTFd
                                                                                • 1213 Demand rate nop
                                                                                • 1214 Average probability of dangerous failure on demand PFDavg
                                                                                  • Feedback
                                                                                  • Contact
                                                                                      1. naechste_Seite 24
                                                                                      2. naechste Seite 18
                                                                                      3. naechste Seite 6
                                                                                      4. naechste Seite 16
                                                                                      5. naechste Seite 14
                                                                                      6. naechste Seite 25
                                                                                      7. naechste_Seite 11
                                                                                      8. naechste_Seite 17
                                                                                      9. fbArbeitspunkt_Min Ja
                                                                                      10. fbArbeitspunkt Ja
                                                                                      11. ftProgramm Standard-Programm
                                                                                      12. fz_kv
                                                                                      13. fz_pe 80
                                                                                      14. fz_pG 60
                                                                                      15. fzDelta_p_Soll 20
                                                                                      16. ftEinheit_Druck mbar
                                                                                      17. fatTyp [115]
                                                                                      18. fbArbeitspunkt_Min_2 Ja
                                                                                      19. fbArbeitspunkt_2 Ja
                                                                                      20. ftRegler_Typ VAG
                                                                                      21. ftProgramm_2 Standard-Programm
                                                                                      22. fz_kv_2
                                                                                      23. fatMedium [08]
                                                                                      24. fzDichte 08
                                                                                      25. ftEinheit_Dichte kgm3
                                                                                      26. fzV_Norm 30
                                                                                      27. ftEinheit_Volstrom m3h
                                                                                      28. fz_pe_2 80
                                                                                      29. fz_pG_2 60
                                                                                      30. fzDelta_p_Soll_2 20
                                                                                      31. ftEinheit_Druck2 [mbar]
                                                                                      32. ftEinheit_Geschw [ms]
                                                                                      33. fatTyp_2 [10954451150103322]
                                                                                      34. fbArbeitspunkt_Min_3 Ja
                                                                                      35. fbArbeitspunkt_3 Ja
                                                                                      36. ftProgramm_3 Standard-Programm
                                                                                      37. fz_kv_3
                                                                                      38. fz_pe_3 20
                                                                                      39. fz_pG_3 0
                                                                                      40. fzDelta_p_Soll_3 20
                                                                                      41. fatTyp_3 [123]
                                                                                      42. fatSchaltleistung [6363683]
                                                                                      43. fz_nop_Stunde 1
                                                                                      44. fz_nop_Jahr 8760
                                                                                      45. fzZyklus 3600
                                                                                      46. fzB10d 6363683
                                                                                      47. fzT10d 10
                                                                                      48. fzPFHd_1V 15714170551864384e-8
                                                                                      49. fzPFDavg_1V
                                                                                      50. ftGeeignet_1V PL d SIL 2
                                                                                      51. fzPFHd_2V 33505832253532625e-10
                                                                                      52. fzPFDavg_2V
                                                                                      53. ftGeeignet_2V PL e SIL 3
                                                                                      54. ftUebersicht Off
                                                                                      55. ftVerstaendlichkeit Off
                                                                                      56. ftFehlende_Info
                                                                                      57. ftUmfang Off
                                                                                      58. ftVerwendung_1 Off
                                                                                      59. ftVerwendung_2 Off
                                                                                      60. ftVerwendung_3 Off
                                                                                      61. ftVerwendung_4 Off
                                                                                      62. ftNavigation Off
                                                                                      63. ftTaetigkeitsbereich Off
                                                                                      64. ftBemerkung
                                                                                      65. Michael Rehkamp Elster Kromschroumlder>btnSenden
Page 18: VAD, VAG, VAV, VAH, VRH, VCD, VCG, VCV, VCH · PDF fileVAD, VAG, VAH, VAV, VRH, VCD, VCG, VCV, VCH · Edition 04.15 6 VAD VAD VAS 1 .1 Examples of application 1 .1 .1 Constant pressure

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 18

3 1 4 Variable airgas ratio control VAVThe servo regulator maintains a set constant outlet pressure pd The variable airgas ratio control VAV controls the outlet pressure pd depending on the variable air control pressure psa The ratio of gas pressure to air pressure remains constantThe settings N and V can be changed and read off from both sides of the unit using the adjusting screwsThe ratio of gas pressure to air pressure at low-fire rate can be changed by adjusting the zero point setting N By turning the adjusting screw ldquoNrdquo the force of the zero point spring and thus the zero point is changed by plusmn 15 mbar (06 WC) see page 34 (Project planning information)The high-fire rate is set by turning the adjusting screw ldquoVrdquo until the required flue gas values are achieved see page 34 (Project planning information) The ratio of gas pressure to air pressure can be set from 061 to 31The settings N and V influence each other and the adjustment process must be repeated if necessaryThe outlet pressure pd is applied to the servo diaphragm via the internal feedback The combustion chamber control pres-sure psc is transmitted to the space under the air and servo diaphragms via an impulse lineThe pressure differential psa - psc is achieved on the air diaphragm and the pressure differential pd - psc on the servo diaphragm This ensures that pressure fluctuations in the combustion cham-ber can be compensated The flue gas values remain constant in the case of fluctuations in the combustion chamber pressure (pd - psc) = (psa - psc) times V + N

Function

pdpsc

psa

Air diaphragm

Transmission ratio V

Zero point setting N zero point spring

Internalfeedback

Adjustment diaphragm

Servo diaphragm

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 19

1 COM

2 NO

3 NC

3 1 5 Pressure regulator with gas solenoid valve VAx S position indicator with visual indicatorOpening when the pressure regulator is opened the posi-tion indicator switches The visual indicator is activated The ldquoopenrdquo signal is marked in red The double valve seat opens to release the volume of gasClosing the pressure regulator VAx is disconnected from the voltage supply and the closing spring presses the double valve disc on to the valve seat The position indicator is actuated The visual indicator is white for ldquoclosedrdquoThe actuator cannot be rotated on a pressure regulator with a position indicator and a visual indicatorNOTE NFPA 86 ndash the following must be taken into account as soon as the capacity of the pilot or main burner exceeds 117 kW (400000 BTUh) safety shut-off valve VASS must be fitted with a proof of closure overtravel switch with a visual position indicator and the burner-side pressure regulator with gas solenoid valve VAxS must also be fitted with a position indicator with visual indicator The closed position can be verified using the proof of closure switch of the gas solenoid valve VASS

Function

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 20

3 2 AnimationThe interactive animation shows the function of the valVario controls VADVAGVAHVAVClick on the picture The animation can be controlled using the control bar at the bottom of the window (as on a DVD player) To play the animation you will need Adobe Reader 7 or a newer version If you do not have Adobe Reader on your system you can download it from the Internet

Go to wwwadobecom click on ldquoAdobe Readerrdquo at the bottom of the page and follow the instructionsIf the animation does not start to play you can download it from the document library (wwwdocuthekcom) as an inde-pendent application

Function

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 21

3 3 Connection diagramWiring to EN 60204-1Connection diagram for VAxS with position indicator ndash see page 19 (Pressure regulator with gas solenoid valve VAxS position indicator with visual indicator)

3 3 1 VAx with M20 cable gland

L1 (+)

N (ndash)

3 3 2 VAx with plug

1 = N (-)

2 = L1 (+)

3 3 3 VAS with VADVAGVAHVAV with M20 cable glandL1V1 (+)

N (-)

L1V2 (+)

3 3 4 VAS with VADVAGVAHVAV with plug2 = L1V1 (+)

1 = N (-)

3 = L1V2 (+)

Function

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 22

4 Replacement possibilities for MODULINE pressure regulators with gas solenoid valve4 1 GVS GVI GVIB GVR and GVRH are to be replaced by VAD VAG VAG+VAS VAH and VAV

Type TypeGVS Pressure regulator with gas solenoid valve Pressure regulator with gas solenoid valve VADGVI Airgas ratio control with gas solenoid valve Airgas ratio control with gas solenoid valve VAG

GVIB Airgas ratio control with gas solenoid valve and bypass valve

Airgas ratio control with gas solenoid valve and bypass valve VAG+VAS

GVRH Flow rate regulator with gas solenoid valve Flow rate regulator with gas solenoid valve VAHGVR Variable airgas ratio control with gas solenoid valve Variable airgas ratio control with solenoid valve VAV115125 Flange 38 Size 115

Size 125 on request

115125 Flange frac12 Size 115

Size 125 Size 1 DN 15 115

115125 Flange frac34 Size 115

Size 125 Size 1 DN 20 120

115125 Flange 1 Size 115

Size 125 Size 1 DN 25 125

232240 Flange 1 Size 232

Size 240 on request

232240 Flange 1frac12 Size 232

Size 240 Size 2 DN 40 240

350 Flange 1frac12 Size 350 on request350 Flange 2 Size 350 Size 3 DN 50 350ML MODULINE + Rp internal thread connection fl anges Rp internal thread RTML MODULINE + NPT internal thread connection fl anges NPT internal thread N01 pu max 100 mbar (15 psig) pu max 500 mbar (7 psig) 02 200 mbar (3 psig) 500 mbar (7 psig)

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 23

Replacement possibilities for MODULINE pressure regulators with gas solenoid valve gt GVS GVI GVIB GVR and GVRH are to be replaced by VAD VAG VAG+VAS VAH and VAV

ContinuationType Type

Quick opening Quick opening NF1 Control ratio 11 Control ratio 11 K Mains voltage 24 V DC Mains voltage 24 V DC K

ndash 100 V AC PQ 120 V AC 120 V AC Q

ndash 200 V AC YT 220240 V AC 230 V AC W3 Electrical connection via terminals Electrical connection via terminals 6 Electrical connection via socket Electrical connection via socket 9 Metal terminal connection box Electrical connection via terminals S Position indicator Position indicator with visual indicator SG Position indicator for 24 V Position indicator for 24 V with visual indicator GM Suitable for biologically produced methane Suitable for biologically produced methane

Pressure test point at the inlet Pressure test point at the inlet and outlet Outlet pressure pd -25

Outlet pressure pd 25 ndash 25 mbar (1 ndash 10 WC)

2 ndash 90 mbar (08 ndash 36 WC) 20 ndash 50 mbar (8 ndash 20 WC) -5035 ndash 100 mbar (14 ndash 40 WC) -100Standard seat A

ExampleGVS 350ML01T3with Rp 2 connection flanges

ExampleVAD 350RNW-100A

with test points

= standard = available Pressure test points may be attached at the left- andor right-hand side Position indicator with visual indicator can be attached at the left- or right-hand side

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 24

∆p [i

nch

WC]

Qn [SCFH]100 400 600 4000 60001000 200020 30 40 50 200 3006015 80

1

08

1

2

3

4

56

8

10

20

30

40

5060

80

100

200

∆p [m

bar]

5

8

3

20

10

30

40

80

60

300

400

50

04 06 1 2 3 4 5 808 10 20 30 402

03 60 100 200

100

200

500

1

3

2

04 06 08 1 2 3 4 5 6 8 10 20 30 40

04 06 08 1 2 3 4 5 6 8 10

200

80 10020 3003

03Qn [m3h]

02

50 60 80 100

40 50 60

VAD

115

B

VAD

120

AVA

D 12

5A

P1P2

VAD

240

AVA

D 35

0A

= natural gas (ρ = 080 kgm3) = propane (ρ = 201 kgm3) = air (ρ = 129 kgm3)

The characteristic flow rate curves have been meas-ured with the specified flanges and a fitted strainer If two or more valves are combined the pressure loss of each additional valve drops by approx 5

metric imperial

Enter densityFlow rate Qn

Inlet pressure pu

Outlet pressure pd

Product RV v

Pressure loss ∆p

∆pmin

5 Flow rate5 1 Selection example for VADNatural gas Flow rate Qmax = 30 m3h Inlet pressure pu = 80 mbar Outlet pressure pd = 60 mbarThe desired control ratio from high-fire to low-fire rate is RV = 101High fire ∆p = pu - pd = 20 mbar Point P1Low fire Point P2 Qmin = 26 m3h at ∆p = 20 mbar RV = Qmax Qmin = 1151

Point P1 and point P2 must be within the working range of a unit size We recommend that you select the smallest size to achieve the best control properties

5 1 1 Calculate VAD

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 25

∆p [i

nch

WC]

Qn [SCFH]100 400 600 4000 60001000 200020 30 40 50 200 3006015 80

1

08

1

2

3

4

56

8

10

20

30

40

5060

80

100

200

∆p [m

bar]

5

8

3

20

10

30

40

80

60

300

400

50

04 06 1 2 3 4 5 808 10 20 30 402

03 60 100 200

100

200

500

1

3

2

04 06 08 1 2 3 4 5 6 8 10 20 30 40

04 06 08 1 2 3 4 5 6 8 10

200

80 10020 3003

03Qn [m3h]

02

50 60 80 100

40 50 60

= pd min lt 5 mbar

VAG

VxH

VAV

115

BVA

GV

xHV

AV 12

0A

VAG

VxH

VAV

125

A

P1

P2

VAG

VxH

VAV

240

AVA

GV

xHV

AV 3

50A

= natural gas (ρ = 080 kgm3) = propane (ρ = 201 kgm3) = air (ρ = 129 kgm3)

The characteristic flow rate curves have been meas-ured with the specified flanges and a fitted strainer If two or more valves are combined the pressure loss of each additional valve drops by approx 5

5 2 Selection example for VAG VAH VRH VAV Natural gas Flow rate Qmax = 30 m3h Inlet pressure pu = 80 mbar Outlet pressure pd max VAG = 60 mbarThe desired control ratio from high-fire to low-fire rate is RV = 101High fire ∆p = pu - pd max = 20 mbar Point P1Low fire pd min = pd max RV2 = 06 mbar Qmin = Qmax RV = 3 m3h ∆p = pu - pd min = 794 mbar Point P2 select VAG 120APoint P1 and point P2 must be within the working range of a unit size We recommend that you select the smallest size to achieve the best control properties

metric imperial

Enter densityFlow rate Qn

Inlet pressure pu

Outlet pressure pd

Product RV v

5 2 1 Calculate VAG VxH VAV

Pressure loss ∆p

∆pmin

Flow rate

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 26

∆p [i

nch

WC]

Qn [SCFH]100 400 600 4000 60001000 200020 30 40 50 200 3006015 80

1

08

1

2

3

4

56

8

10

20

30

40

5060

80

100

200

∆p [m

bar]

5

8

3

20

10

30

40

80

60

300

400

50

04 06 2 3 4 5 808 10 20 30 402

03 60 100 200

100

200

500

1

3

2

04 06 08 1 2 3 4 5 6 8 10 20 30 40

04 06 08 1 2 3 4 5 6 8 10

200

80 10020 3003

03Qn [m3h]

02

50 60 80 100

40 50 60

VAG

115

N

P1VAG

125

N

VAG

120

N

VAG

240

NP2

VAG

350

N

= natural gas (ρ = 080 kgm3) = propane (ρ = 201 kgm3) = air (ρ = 129 kgm3)

The characteristic flow rate curves have been meas-ured with the specified flanges and a fitted strainer If two or more valves are combined the pressure loss of each additional valve drops by approx 5

5 3 Selection example for zero governor VAG NNatural gas Flow rate Qmax = 30 m3h Inlet pressure pu = 20 mbar Outlet pressure pd = 0 mbar (atmospheric pressure)The desired control ratio from high-fire to low-fire rate is RV = 101High fire ∆p = pu - pd max = 20 mbar Point P1Low fire Point P2 Qmin = 24 m3h at ∆p = 20 mbar RV = Qmax Qmin = 1231Point P1 and point P2 must be within the working range of a unit size We recommend that you select the smallest size to achieve the best control properties

metric imperial

Enter densityFlow rate Qn

Inlet pressure pu

Outlet pressure pd

Product RV

5 3 1 Calculate VAG N

Pressure loss ∆p

∆pmin

Flow rate

v

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 27

6 Selection6 1 Selection table for pressure regulator with solenoid valve VAD

Accessories right Accessories left

Type1) T R N F N K P Q Y W S2) G2) R2) L2) M20

cab

le g

land

Plug

with

soc

ket

Plug

with

out s

ocke

t

-25-50 -100 A B Scre

w p

lug

Pres

sure

test

poi

nt

DG

17V

C 3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

Scre

w p

lug

Pres

sure

test

poi

nt

DG

17V

C 3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

VAD 115

VAD 120

VAD 125

VAD 240

VAD 350

= standard = available1) The following nominal inlet fl ange diameters are also available size 1 with nominal diameter DN 10 size 2 with nominal diameters DN 25 DN 32 and DN 50 size 3 with nominal diameters DN 40 and DN 652) Position indicator and bypasspilot gas valve cannot be fi tted together on the same side3) Specify the test point for inlet pressure pu or outlet pressure pdHelp for selecting the pressure regulator VAD can be found on the ProFi DVD wwwkromschroedercom Products DVD Product fi nder ldquoProFirdquo

Order exampleVAD 240RNW-100A

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 28

Selection

6 2 Type code for VADCode DescriptionVAD Pressure regulator with solenoid valve1 ndash 3 SizeT T-product10 ndash 65 Nominal inlet and outlet diameterRNF

Rp internal threadNPT internal thread

ISO fl angeN Quick opening quick closingKPQYW

Mains voltage 24 V DCMains voltage 100 V AC 5060 HzMains voltage 120 V AC 5060 HzMains voltage 200 V AC 5060 HzMains voltage 230 V AC 5060 Hz

SG

Position indicator with visual indicatorPosition indicator for 24 V with visual indicator

RL

Viewed from the right (in the direction of fl ow)Viewed from the left (in the direction of fl ow)

-25-50-100

Outlet pressure pd 25 ndash 25 mbar20 ndash 50 mbar

35 ndash 100 mbarAB

Standard valve seatReduced valve seat

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 29

Selection

6 3 Selection table for airgas ratio control with solenoid valve VAG flow rate regulators VAH VRH

Type1) T R N F N K P Q Y W S2) G2) R2) L2) M20

cab

le g

land

Plug

with

soc

ket

Plug

with

out s

ocke

t

A B E K A N Scre

w p

lug

Pres

sure

test

poi

ntD

G 1

7VC

3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

Scre

w p

lug

Pres

sure

test

poi

ntD

G 1

7VC

3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

VAG 115 VAG 120 VAG 125 VAG 240 VAG 350

VAH 115 VAH 120 VAH 125 VAH 240 VAH 350

VRH 115 VRH 120 VRH 125 VRH 240 VRH 350

= standard = available1) The following nominal inlet fl ange diameters are also available size 1 with nominal diameter DN 10 size 2 with nominal di-

ameters DN 25 DN 32 and DN 50 size 3 with nominal diameters DN 40 and DN 652) Position indicator and bypasspilot gas valve cannot be fi tted together on the same side3) Specify the test point for inlet pressure pu or outlet pressure pdHelp for selecting the regulators can be found on the ProFi DVD wwwkromschroedercom Products DVD Product fi nder ldquoProFirdquo

Order exampleVAG 240RNWAE

Accessories right Accessories left

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 30

Selection

6 4 Type code for VAG VAH VRHCode DescriptionVAGVAHVRH

Airgas ratio control with solenoid valveFlow rate regulator with solenoid valve

Flow rate regulator1 ndash 3 SizeT T-product15 ndash 50 Nominal inlet and outlet diameterRNF

Rp internal threadNPT internal thread

ISO fl angeN1) Quick opening quick closingK1)

P1)

Q1)

Y1)

W1)

Mains voltage 24 V DCMains voltage 100 V AC 5060 HzMains voltage 120 V AC 5060 HzMains voltage 200 V AC 5060 HzMains voltage 230 V AC 5060 Hz

S1)

G1)Position indicator with visual indicator

Position indicator for 24 V with visual indicatorRL

Viewed from the right (in the direction of fl ow)Viewed from the left (in the direction of fl ow)

AB

Standard valve seatReduced valve seat

EKAN

Connection kit for air control pressure psaVAG VAH VRH compression fi tting

VAG plastic hose couplingVAG VAH VRH NPT 18 adapter

VAG zero governor1) Only available for VAG VAV VAH

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 31

6 5 Selection table for variable airgas ratio control with solenoid valve VAVAccessories right Accessories left

Type1) T R N F N K P Q Y W S2) G2) R2) L2) M20

cab

le g

land

Plug

with

soc

ket

Plug

with

out s

ocke

t

A B E K A Scre

w p

lug

Pres

sure

test

poi

ntD

G 1

7VC

3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

Scre

w p

lug

Pres

sure

test

poi

ntD

G 1

7VC

3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

VAV 115

VAV 120

VAV 125

VAV 240

VAV 350

= standard = available1) The following nominal inlet fl ange diameters are also available size 1 with nominal diameter DN 10 size 2 with nominal diameters DN 25 DN 32 and DN 50 size 3 with nominal diameters DN 40 and DN 652) Position indicator and bypasspilot gas valve cannot be fi tted together on the same side3) Specify the test point for inlet pressure pu or outlet pressure pdHelp for selecting the variable airgas ratio control VAV can be found on the ProFi DVD wwwkromschroedercom

Products DVD Product fi nder ldquoProFirdquo

Order exampleVAV 240RNWAK

Selection

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 32

Selection

6 6 Type code for VAVCode DescriptionVAV Variable airgas ratio control with solenoid valve1 ndash 3 SizeT T-product15 ndash 50 Nominal inlet and outlet diameterRNF

Rp internal threadNPT internal thread

ISO fl angeN Quick opening quick closingKPQYW

Mains voltage 24 V DCMains voltage 100 V AC 5060 HzMains voltage 120 V AC 5060 HzMains voltage 200 V AC 5060 HzMains voltage 230 V AC 5060 Hz

SG

Position indicator with visual indicatorPosition indicator for 24 V with visual indicator

RL

Viewed from the right (in the direction of fl ow)Viewed from the left (in the direction of fl ow)

AB

Standard valve seatReduced valve seat

EKA

Connection kit for air control pressure psa and combus-tion chamber control pressure psc

compression fi ttingplastic hose coupling

NPT 18 adapter

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 33

Selection

6 7 AccessoriesModularly configurable withndash Screw plugsndash Pressure test pointsndash Pressure switch DGVC for inlet

andor outlet pressurendash Tightness control TCndash Bypasspilot gas valve VBY 8 for

size 1ndash Bypasspilot gas valve VAS 1For further information see page 37 (Accessories)

Position indicator

Plug with socket

Plug

Screwplugs

Pressuretest points

Pressure switch DGC Tightness

control TC

Bypasspilot gas valve VBY 8 for size 1

Bypasspilot gas valve VAS 1

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 34

7 Project planning informationDo not store or install the unit in the open airThe inlet pressure pu and the outlet pressure pd can be meas-ured on both sides of the valve body To increase the control accuracy an external impulse line can be connected instead of the pressure test point pd

VAD

pu

pd

(psa)

VAGpd

pu

psa

psa

VAD measurement point for the gas outlet pressure pd on the regulator body A combustion chamber control line (psc) can be connected to connection psa for maintaining a constant burner capacityVAG additional measurement point for the air control pressure psa on the regulator body

VAV

psapsc

pu

pd

VAH VRH

pu

pd-

pdpsa-

psa

VAV measurement point for the outlet pressure pd on the regulator bodyVAH additional measurement points for the outlet pressure pd- and the air control pressure psapsa- on the regulator body

7 1 Installation

GFK

VAGVAH

GFKVAD

Sealing material and thread cuttings must not be allowed to get into the valve housing Install a filter upstream of every system

gt20 mmgt0 79

The unit must not be in contact with masonry Minimum clear-ance 20 mm (079 inches)Ensure that there is sufficient space for installation and ad-justment

le +100 degCle +212 degF

The solenoid body heats up during operation ndash depending on ambient temperature (max 60degC140degF) and intrinsic heating (approx 40degC104degF)

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 35

In the case of double solenoid valves the position of the con-nection box can only be changed by removing the actuator and reinstalling it offset by 90deg or 180deg

If more than three valVario controls are installed in line the controls must be supported

The seals in some gas compression fittings are approved for temperatures of up to 70degC (158degF) This temperature limit will not be exceeded if the flow through the pipe is at least 1 msup3h (3531 SCFH) of gas and the maximum ambient temperature is 50degC (122degF)

7 1 1 Installation position

pu ge 80 mbar(80 hPa32 WC)

VAD VAG VAH VRH VAV

In humid environments black solenoid actuator in the vertical upright position only

VAD VAG VAH VRH black solenoid actuator in the vertical upright position or tilted up to the horizontal not upside downVAG VAH horizontal position only if pu ge 80 mbar (32 WC))VAV installation in the vertical position only black solenoid actuator in the vertical upright positionTo ensure that the airgas ratio control VAG the flow rate regulator VAH VRH or the variable airgas ratio control VAV can react quickly when the load is changed the impulse line for the air control pressure psa and for VAV the impulse line for the combustion chamber control pressure psc should be kept as short as possible The tube internal diameter for the impulse line must always be ge 39 mm (015)

VAH VRHIt is not permitted to install a gas solenoid valve VAS down-stream of flow rate regulator VAH VRH and upstream of fine-adjusting valve VMV The VAS would no longer be able to perform its function as a second safety valve if installed in the above-mentioned position

M

VMV

VAH

VASVAS

pd-

psa-psa

VMV

VAH pd-

psa-psa

The measuring orifice in the air line for impulse lines psa and psa- must always be installed downstream of the air control valve

Project planning information gt Installation

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 36

VAVThe impulse line for the combustion chamber control pres-sure psc must be fitted so that no condensation can enter the pressure regulator but rather flows back into the combustion chamber

7 2 Setting the low-fire rate on VAG VAH VRH VAV

-10 +05-05

ndash

+1

-15

mbar

+15

06

1 152

3

N V

+ +ndash

+30 -15+15

ndash

-3

+5

mbar

-5

N

+

VAG VAH VRH VAV

If the burner operates at low-fire rate the gasair mixture can be changed using the parallel shift of the characteristic curve by turning the adjusting screw ldquoNrdquoAdjusting range at low fire VAG VAH VRH -5 to +5 mbar (-195 to +195 WC) VAV -15 to +15 mbar (-06 to +06 WC)

7 3 Setting the high-fire rate on VAVTo set the high-fire rate the transmission ratio is changed us-ing the adjusting screw ldquoVrdquo until the required flue gas values are achievedTransmission ratio V = pdpsa = 061 to 31The settings N and V can influence each other and must be repeated if necessary

+N+V

-V

-N

VAV

psa [mbar]

p d [m

bar]

7 3 1 CalculationWith no connection to the combustion chamber control pres-sure psc pd = V times psa + NWith connection to the combustion chamber control pressure psc (pd - psc) = V times (psa - psc) + N

Project planning information

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 37

pu pd

21579

4836

085310

189

142

8 Accessories8 1 Gas pressure switch DG VC for VAx VRHType Adjusting range [mbar]DG 17VC 2 to 17DG 40VC 5 to 40DG 110VC 30 to 110DG 300VC 100 to 300

Scope of delivery 1 times pressure switch for gas 2 times retaining screws 2 times sealing rings

8 2 Gas pressure switch DG VCT for VAx T VRH TType Adjusting range [WC]DG 17VCT 08 to 68DG 40VCT 2 to 16DG 110VCT 12 to 44DG 300VCT 40 to 120

Scope of delivery 1 times gas pressure switch with AWG 18 connection wires 2 times retaining screws 2 times sealing ringsMonitoring the inlet pressure pu the electrical plug of the pressure switch for gas points towards the inlet flangeMonitoring the outlet pressure pd the electrical plug of the pressure switch for gas points towards the outlet flange

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 38

A BC

D

FE

ACD

F

B

E

8 3 Bypass valvepilot gas valve VAS 18 3 1 VAS 1 attached to VADVAGVAHVAV 1Scope of delivery A 1 times bypasspilot gas valve VAS 1 B 4 times O-rings C 4 times double nuts D 4 times connection parts E 1 times mounting aidBypass valve VAS 1 F 2 times connection pipes if the bypass valve has a blind flange

at the outlet sidePilot gas valve VAS 1 F 1 times connection pipe 1 times sealing plug if the pilot gas valve

has a threaded flange at the outlet side

Accessories

8 3 2 VAS 1 attached to VADVAGVAHVAV 2 VADVAGVAHVAV 3Scope of delivery A 1 times bypasspilot gas valve VAS 1 B 4 times O-rings C 4 times spacer sleeves D 4 times connection parts E 1 times mounting aidBypass valve VAS 1 F 2 times connection pipes if the bypass valve has a blind flange

at the outlet sidePilot gas valve VAS 1 F 1 times connection pipe 1 times sealing plug if the pilot gas valve

has a threaded flange at the outlet side

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 39

2

3

456

810

20

30

405060

80100

∆p [m

bar]

005 01 02 03 05 08 1 2 3 4 51

3

2

Qn [m3h]

1

01

02

03

0405

08

003

002

6 8 10

005 01 02 03 05 08 1 2 3 4 5003 6 8 10

20

005 01 02 03 05 08 1 2 3 4 5003 6 8 10 20

30

∆p [i

nch

WC]

1

2

3

456

810

20

30

40

04

004

006

00801

02

03

0506

08

Qn [SCFH]10 40 60 100 200 3001 500 10002 3 4 5

120 306 8

21 3 4 5 6 7 8 910

8 3 3 Flow rate

The characteristic flow rate curves have been measured for bypass valve VAS 1 with connection pipe diameter 1 to 10 mm (004 to 04) and for the pilot gas valve with 10 mm (04) connection pipe

Bypass valve connection pipe diameter [mm]

Pilo

t gas

val

ve 1

0 m

m (0

4)

conn

ectio

n pi

pe d

iam

eter

Accessories gt Bypass valvepilot gas valve VAS 1

= natural gas (ρ = 080 kgm3) = propane (ρ = 201 kgm3) = air (ρ = 129 kgm3)

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 40

Accessories

8 4 Bypass valvepilot gas valve VBY 8 for VADVAGVAHVAV 1

B

C

AVBY 8

VAx 1

55

(217)40(157)

70 (276)

80(315)

Rp frac14(pilot gas valve)

For mounting on VAD VAG VAH VAV 1 and double solenoid valve VCD VCG VCH VCV 1

8 4 1 Scope of delivery VBY 8I as bypass valveA 1 times bypass valve VBY 8IB 2 times retaining screws with 4 times O-rings both retaining screws

have a bypass orificeC 1 times grease for o-rings

8 4 2 Scope of delivery VBY 8R as pilot gas valveA 1 times pilot gas valve VBY 8RB 2 times retaining screws with 5 x O-rings one retaining screw

has a bypass orifice (2 x O-rings) the other does not (3 x O-rings)

C 1 times grease for O-rings

8 4 3 SelectionType I R W Q K 6L -R -L E B D 05

VBY 8

Order exampleVBY 8RW6L-LED

8 4 4 Type codeCode DescriptionVBY Gas solenoid valve8 Nominal sizeIR

For internal gas pick-up as bypass valveFor external gas pick-up as pilot gas valve

KQW

Mains voltage 24 V DC Mains voltage 120 V AC 5060 HzMains voltage 230 V AC 5060 Hz

6L Electrical connection via plug and socket with LED-R-L

Attachment side of main valve right-hand sideAttachment side of main valve left-hand side

EB

Attached to the VAxEnclosed (separate packing unit)

05D

Nozzle diameter = 05 mm (002)Flow adjustment

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 41

2

01

02

03

05

081

3

456

810

20

30

405060

80100

∆p [m

bar]

1

3

201 02 03 05 1 2 3001 003 4

Qn [m3h]

02 03 05 1 2

01 02 05

002 006

002

002 006 1

0010006 005 01

001

0003

0006 2 3

VBY 8DVBY 805

∆p [i

nch

WC]

1

2

3

456

810

20

30

40

040506

08

1

Qn [SCFH]10 40 60 1005 2081 2 30402

01

02

03

004005006

008

Adjusting range

8 4 5 Flow rateVBY 8 D

+

-

The flow rate can be set by turning the flow rate restrictor (4 mm016 Allen screw) frac14 of a turn Flow rate 10 to 100

VBY 8 05The flow is routed through a 05 mm (002) nozzle and thus has a fixed characteristic flow rate curve Adjustment is not possible

8 4 6 Technical dataInlet pressure pu max 500 mbar (7 psig)Ambient temperature 0 to +60degC (32 to 140degF) no condensation permittedStorage temperature 0 to +40degC (32 to 104degF) no condensation permittedPower consumption 24 V = 8 W 120 V = 8 W 230 V = 95 WEnclosure IP 54

Accessories gt Bypass valvepilot gas valve VBY 8 for VADVAGVAHVAV 1

= natural gas (ρ = 080 kgm3) = propane (ρ = 201 kgm3) = air (ρ = 129 kgm3)

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 42

TC 116VB C

56(22)

49(193)

27(106)

A

A

VCx 1 VCx 2VCx 3

8 5 Tightness control TC 116Vfor VAx 1 ndash 3An adapter plate is required to attach the tightness control to the right- or left-hand side of the pressure regulator with gas solenoid valveScope of delivery A 1 times adapter plate B 2 times O-rings C 2 times retaining screwsFor attachment to left-hand side Order No 74922391 right-hand side Order No 74921995

8 6 Pressure test pointsTest points to check the inlet pressure pu and outlet pressure pdScope of delivery 1 x pressure test points with 1 x profiled sealing rings Order No 74923390

8 7 Cable gland setWhen wiring a double solenoid valve with pressure regula-tor VCx the connection boxes are to be connected using a cable gland setThe cable gland set can only be used if the connection boxes are at the same height and on the same side and if both valves are equipped either with or without a proof of closure switchVA 1 Order No 74921985 VA 2 Order No 74921986 VA 3 Order No 74921987

Accessories

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 43

A B

D

C

Accessories

8 9 Differential pressure orifice

Size PipeDN

Differential pressure orifi cewith outlet dia

1 15 17 mm 0671 20 25 mm 0981 25 30 mm 1182 40 46 mm 1813 50 58 mm 228

If pressure regulator VADVAGVAV 1 is retrofitted upstream of gas solenoid valve VAS 1 a DN 25 differential pressure orifice with outlet opening d = 30 mm (118) must be inserted at the outlet of the pressure regulatorIn the case of pressure regulator VAx 115 or VAx 120 the DN 25 differential pressure orifice must be ordered separately and retrofitted Order No 74922240

8 8 Seal set VA 1 ndash 3VA 1 Order No 74921988 VA 2 Order No 74921989 VA 3 Order No 74921990Scope of deliveryA 1 times double block seal B 2 times O-rings (flange) C 2 times O-rings (pressure switch) for pressure test pointscrew plug D 2 times sealing rings (flat sealing) and 2 times profiled sealing rings

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 44

BA

C

pd-

8 11 Attachment blockFor locked installation of pressure gauge and other acces-soriesScope of delivery A 1 times attachment block B 2 times self-tapping screws for installation C 2 times O-rings

Accessories

8 10 Retaining frameIn the event that a pressure regulator VAx is installed at a later point upstream of a gas solenoid valve VAS a measur-ing orifice VMO or a fine-adjusting valve VMV the retaining frame must be fitted at the inlet of the second device in order to fasten the differential pressure orifice at the regulator outlet Order the retaining frame separatelyRetaining frame for Size 1 Order No 74923029 Size 2 Order No 74923030 Size 3 Order No 74923031

8 12 Gas control lineFine-adjusting valve VMV can be installed on the flow rate regulator VAH for fine adjustment of the gas flow rateThe gas control line for gas outlet pressure pd- is available with 2 18 compression fittingsSize 1 Order No 74924458 Size 2 Order No 74924459

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 45

8 13 Measuring orifice VMOThe measuring orifice VMO is designed to reduce the gas and air flow rates and is installed downstream of the valVario control The measuring orifice is available with Rp internal thread (NPT internal thread) or flange to ISO 7005See wwwdocuthekcom Elster Kromschroumlder Krom-schroumlder LBE Products 03 Valves and butterfly valves valVario accessories Type of document Technical Informa-tion VMO

Accessories

8 14 Filter module VMFUsing the filter module VMF the gas flow upstream of the gas solenoid valve VAS and the airgas ratio control is cleaned The filter module is available with Rp internal thread (NPT internal thread) or flange to ISO 7005 and can also be supplied with fitted pressure switch as an optionSee wwwdocuthekcom Elster Kromschroumlder Krom-schroumlder LBE Products 03 Valves and butterfly valves valVario accessories Type of document Technical Informa-tion VMF

8 15 Fine-adjusting valve VMVThe flow rate is set using the fine-adjusting valve VMV The fine-adjusting valve is available with Rp internal thread (NPT internal thread) or flange to ISO 7005See wwwdocuthekcom Elster Kromschroumlder Krom-schroumlder LBE Products 03 Valves and butterfly valves valVario accessories Type of document Technical Infor-mation VMV

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 46

9 Technical dataGas types natural gas LPG (gaseous) biologically produced methane (max 01 -by-vol H2S) or clean air other gases on request The gas must be clean and dry in all temperature conditions and must not contain condensateCE and FM approved UL listed max inlet pressure pu 10 ndash 500 mbar (4 ndash 200 WC) FM approved (230 V AC 120 V AC 24 V DC) non opera-tional pressure 700 mbar (10 psig)ANSICSA approved (230 V AC 120 V AC 24 V DC) up to 350 mbar (5 psig)Opening time of the solenoid valve quick opening le 05 s Closing time quick closing lt 1 sMedium and ambient temperatures -20 to +60degC (-4 to +140degF) no condensation permittedStorage temperature -20 to +40degC (-4 to +104degF)Enclosure IP 65Valve housing aluminium valve seal NBRConnection flanges with internal thread Rp to ISO 7-1 NPT to ANSIASMESafety valve Class A to EN 161 Factory Mutual Research Class 7400 Process Control Valves (230 V AC 120 V AC 24 V DC) ANSI Z2121 and CSA 65 ANSI Z2118 and CSA 63Control class A to EN 88-1Control range up to 101

Mains voltage 230 V AC +10-15 5060 Hz 200 V AC +10-15 5060 Hz 120 V AC +10-15 5060 Hz 100 V AC +10-15 5060 Hz 24 V DC plusmn20Duty cycle 100Power factor of the solenoid coil cos φ = 09Power consumption

Type Voltage Power

VAx 1

24 V DC 25 W ndash100 V AC 25 W (26 VA)120 V AC 25 W (26 VA)200 V AC 25 W (26 VA)230 V AC 25 W (26 VA)

VAx 2 VAx 3

24 V DC 36 W ndash100 V AC 36 W (40 VA)120 V AC 40 W (44 VA)200 V AC 40 W (44 VA)230 V AC 40 W (44 VA)

VBY24 V DC 8 W ndash

120 V AC 8 W ndash230 V AC 95 W ndash

Cable gland M20 times 15Electrical connection cable with max 25 mm2 (AWG 12) or plug with socket to EN 175301-803

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 47

Position indicator contact rating

Type Voltage Min current(resistive load)

Max current(resistive load)

VAxS VCxS 12 ndash 250 V AC 5060 Hz 100 mA 3 AVAxG VCxG 12 ndash 30 V DC 2 mA 01 A

Position indicator switching frequency max 5 times per minute

Switching current [A]

Switching cyclescos φ = 1 cos φ = 06

01 500000 50000005 300000 250000

1 200000 1000003 100000 ndash

Limited to max 200000 cycles for heating systems

9 1 VADOutlet pressure pd VAD-25 25 ndash 25 mbar (1 ndash 10 WC) VAD-50 20 ndash 50 mbar (8 ndash 20 WC) VAD-100 35 ndash 100 mbar (14 ndash 40 WC)Combustion chamber control pressure psc (connection psa)

-20 to +20 mbar (-78 to +78 WC)

VAD

pu

pd

(psa)

9 2 VAGOutlet pressure pd 05 ndash 100 mbar (02 ndash 40 WC)Air control pressure psa 05 ndash 100 mbar (02 ndash 40 WC)

Adjusting range at low fire plusmn5 mbar (plusmn2 WC)Transmission ratio of gas to air 11The inlet pressure must always be higher than the air control pressure psa + pressure loss ∆p + 5 mbar (2 WC)

VAGpd

pu

psa

psa

VAGK 1 x 18 coupling for plastic hose (internal dia 39 mm (015) external dia 61 mm (024)) or VAGE 1 x 18 compression fitting for 6 times 1 tube or VAGA 1 x NPT 18 adapter or VAGN zero governor with breathing orifice

9 3 VAH VRHAir control pressure psa 06 ndash 100 mbar (024 ndash 40 WC) Differential air pressure ∆psa (psa - psa-) 06 ndash 50 mbar (024 ndash 197 WC) Differential gas pressure ∆pd (pd - pd-) 06 ndash 50 mbar (024 ndash 197 WC)Transmission ratio of gas to air 11The inlet pressure must always be higher than the differen-tial air pressure ∆psa + pressure loss ∆p + max gas pres-sure on burner + 5 mbar (2 WC)Adjusting range at low fire plusmn5 mbar (plusmn2 WC)

Technical data

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 48

VAHVRH

pd-

pu

psa-

psa

Connection of the air control pressure psaVAHE VRHE 3 x 18 compression fitting for 6 times 1 tube or VAHA VRHA 3 x NPT 18 adapter

9 4 VAVOutlet pressure pd 05 ndash 30 mbar (02 ndash 117 WC)Air control pressure psa 04 ndash 30 mbar (015 ndash 117 WC)Combustion chamber control pressure psc

-20 to +20 mbar (-78 to +78 WC)Min control pressure differential psa - psc 04 mbar (015 WC)Min pressure differential pd - psc 05 mbar (02 WC)Adjusting range at low fire plusmn15 mbar (plusmn06 WC)Transmission ratio of gas to air 061 to 31The inlet pressure pu must always be higher than the air control pressure psa times transmission ratio V + pressure loss ∆p + 15 mbar (06 WC)

pu

pd psapsc

VAV

VAVK 2 x plastic hose couplings (internal dia 39 mm (015) external dia 61 mm (024)) or VAVE 2 x 18 compression fitting for 6 times 1 tube or VAVA 2 x NPT 18 adapter

Technical data

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 49

9 5 Safety-specific characteristic values for VAx 1 ndash 3For SILSuitable for Safety Integrity Level SIL 1 2 3

Diagnostic coverage DC 0

Type of subsystem Type A to EN 61508-2 74312

Operating mode High demand mode pursu-ant to EN 61508-4 3512

For PLSuitable for Performance Level PL a b c d e

Category B 1 2 3 4Common cause failure CCF gt 65Application of essential safety requirements Satisfied

Application of tried-and-tested safety requirements Satisfied

For SIL and PL

B10d value

Operating cyclesVAD VAG VAV VAH 1 10094360VAD VAG VAV VAH 2 8229021VAD VAG VAV VAH 3 6363683

Hardware fault tolerance (1 valve) HFT 0

Hardware fault tolerance (2 valves) HFT 1

Safe failure fraction SFF gt 90Fraction of undetected com-mon cause failures β ge 2

Max service life under operating conditions10 years after date of production plus max 12 year in stor-age prior to first use or once the given number of operating cycles has been reached depending on which is achieved firstThe devices are suitable for single-channel systems (HFT = 0) up to SIL 2PL d and up to SIL 3PL e when two re-dundant valves are installed in a double-channel architecture (HFT = 1) provided that the complete system complies with the requirements of EN 61508ISO 13849

For a glossary of terms see page 53 (Glossary)

Technical data

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 50

nop 1hnop 1a

sB10d

T10d aPFHD (1 VAx) 1h

PFHD (2 VAx) 1h

PFDavg (1 VAx)

PFDavg (2 VAx)

Technical data gt Safety-specific characteristic values for VAx 1 ndash 3

9 5 1 Determining the PFHD value the λD value and the MTTFd value

PFHD = λD = x nop= 1MTTFd

01B10d

PFDavg = x λD x 24 x 365 x T10d 12

Type

Cycle time

suitable for

suitable for

PFHD = Probability of dangerous failure (HDM = high de-mand mode) [1hour]PFDavg = Average probability of dangerous failure on de-mand (LDM = low demand mode)λD = Mean dangerous failure rate [1hour]MTTFd = Mean time to dangerous failure [hours]nop = Demand rate (mean number of annual operations) [1hour]

9 5 2 Calculating the PFHD and PFDavg

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 51

VAD VAG VAH VAV

H1

Rp frac14(NPT frac14)

H2

E

LF

F

H4

H3

B

VAxS VAxF

L2G

G

Technical data

9 6 Dimensions

Type

Connec-tion Dimensions

WeightRpNPT DN

L L2 E F G H1 H2 H3 H4 Bmm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch kg lbs

VAx 115 12 15 75 29 ndash ndash 75 29 15 06 ndash ndash 143 56 82 32 161 63 117 46 97 38 18 40VAH 115 12 15 75 29 ndash ndash 75 29 15 06 ndash ndash 143 56 100 39 161 63 135 53 97 38 2 44VAx 120 34 20 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 82 33 161 63 117 46 97 38 19 42VAH 120 34 20 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 100 39 161 63 135 53 97 38 21 46VAx 125 1 25 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 82 33 161 63 117 46 97 38 19 42VAH 125 1 25 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 100 39 161 63 135 53 97 38 21 46VAx 240 112 40 128 50 200 79 85 33 29 11 66 26 170 67 112 44 191 75 162 64 125 49 44 97VAH 240 112 40 128 50 200 79 85 33 29 11 66 26 170 67 132 52 191 75 182 72 125 49 47 104VAx 350 2 50 155 61 230 91 85 33 36 14 74 29 180 70 135 53 201 79 196 77 160 63 61 134VAH 350 2 50 155 61 230 91 85 33 36 14 74 29 180 70 156 61 201 79 217 85 160 63 64 141

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 52

10 Converting unitssee wwwadlatusorg

11 Maintenance cyclesAt least once per annum at least twice per annum for biologi-cally produced methaneIf the flow rate drops clean the strainer

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 53

12 Glossary12 1 Diagnostic coverage DCMeasure of the effectiveness of diagnostics which may be determined as the ratio between the failure rate of detected dangerous failures and the failure rate of total dangerous failuresNOTE Diagnostic coverage can exist for the whole or parts of a safety-related system For example diagnostic cover-age could exist for sensors andor logic system andor final elements Unit see EN ISO 13849-12008

12 2 Mode of operationHigh demand mode or continuous modeOperating mode where the frequency of demands for opera-tion made on a safety-related system is greater than one per year or greater than twice the proof-test frequencysee EN 61508-42008

12 3 CategoryClassification of the safety-related parts of a control system in respect of their resistance to faults and their subsequent behaviour in the fault condition and which is achieved by the structural arrangement of the parts fault detection andor by their reliability see EN ISO 13849-12008

12 4 Common cause failure CCFFailures of different items resulting from a single event where these failures are not consequences of each othersee EN ISO 13849-12008

12 5 Fraction of undetected common cause failures β Fraction of undetected failures of redundant components due to a single event whereby these failures are not based on mutual causesNOTE β is expressed as a fraction in the equations and as a percentage elsewheresee EN 61508-62010

12 6 B10d valueMean number of cycles until 10 of the components fail dan-gerouslysee EN ISO 13849-12008

12 7 T10d valueMean time until 10 of the components fail dangerouslysee EN ISO 13849-12008

12 8 Hardware fault tolerance HFTA hardware fault tolerance of N means that N + 1 is the mini-mum number of faults that could cause a loss of the safety functionsee IEC 61508-22010

12 9 Mean dangerous failure rate λD Mean rate of dangerous failures during operation time (T10d) Unit 1hsee EN ISO 13849-12008

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 54

12 10 Safe failure fraction SFFFraction of safe failures related to all failures which are as-sumed to appearsee EN 13611A22011

12 11 Probability of dangerous failure PFHD Value describing the likelihood of dangerous failure per hour of a component for high demand mode or continuous mode Unit 1hsee EN 13611A22011

12 12 Mean time to dangerous failure MTTFd Expectation of the mean time to dangerous failuresee EN ISO 13849-12008

12 13 Demand rate nop Mean number of annual operationssee EN ISO 13849-12008

12 14 Average probability of dangerous failure on demand PFDavg (LDM = 1 ndash 10 switching cyclesyear)Average probability of a dangerous failure of the safety function on demand (LDM = low demand mode)see EN 61508-6

Glossary

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415

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Remarks

(Adobe Reader 7 or higher required) wwwadobecom

Elster GmbH Postfach 2809 middot 49018 Osnabruumlck Strotheweg 1 middot 49504 Lotte (Buumlren) GermanyT +49 541 1214-0 F +49 541 1214-370 infokromschroedercomwwwkromschroedercom

The current addresses of our international agents are available on the Internetwwwkromschroederdeindexphpid=718ampL=1

We reserve the right to make technical modifications in the interests of progressCopyright copy 2015 Elster GmbH All rights reserved

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0530

  • Pressure regulators with solenoid valve VAD VAG VAV VAH
  • Flow rate regulator VRH
  • Pressure regulators with double solenoid valve VCD VCG VCV VCH
  • Contents
  • 1 Application
    • 11 Examples of application
      • 111 Constant pressure control
      • 112 Constant pressure control with two gas solenoid valves
      • 113 Constant pressure control with max pressure switch
      • 114 Constant pressure control with non-controlled pilot gas outlet
      • 115 Modulating control
      • 116 Modulating control with two gas solenoid valves
      • 117 Modulating control with two gas solenoid valves and inlet pressure switch
      • 118 HighLow control
      • 119 Zero pressure control
      • 1110 Staged flow rate control
      • 1111 Continuous or staged flow rate control
      • 1112 Modulating control with variable airgas ratio control with gas solenoid valve
      • 1113 Modulating control in residential heat generation
          • 2 Certification
          • 3 Function
            • 31 VAD VAG VAH VRH VAV
              • 311 Pressure regulator for gas VAD
              • 312 Airgas ratio control VAG
              • 313 Flow rate regulators VAH VRH
              • 314 Variable airgas ratio control VAV
              • 315 Pressure regulator with gas solenoid valve VAxS position indicator with visual indicator
                • 32 Animation
                • 33 Connection diagram
                  • 331 VAx with M20 cable gland
                  • 332 VAx with plug
                  • 333 VAS with VADVAGVAHVAV with M20 cable gland
                  • 334 VAS with VADVAGVAHVAV with plug
                      • 4 Replacement possibilities for MODULINE pressure regulators with gas solenoid valve
                        • 41 GVS GVI GVIB GVR and GVRH are to be replaced by VAD VAG VAG+VAS VAH and VAV
                          • 5 Flow rate
                            • 51 Selection example for VAD
                              • 511 Calculate VAD
                                • 52 Selection example for VAG VAH VRH VAV
                                  • 521 CalculateVAG VxHVAV
                                    • 53 Selection example for zero governor VAGN
                                      • 531 Calculate VAGN
                                          • 6 Selection
                                            • 61 Selection table for pressure regulator with solenoid valve VAD
                                            • 62 Type code for VAD
                                            • 63 Selection table for airgas ratio control with solenoid valve VAG flow rate regulators VAH VRH
                                            • 64 Type code for VAG VAH VRH
                                            • 65 Selection table for variable airgas ratio control with solenoid valve VAV
                                            • 66 Type code for VAV
                                            • 67 Accessories
                                              • 7 Project planning information
                                                • 71 Installation
                                                  • 711 Installation position
                                                    • 72 Setting the low-fire rate on VAG VAH VRH VAV
                                                    • 73 Setting the high-fire rate on VAV
                                                      • 731 Calculation
                                                          • 8 Accessories
                                                            • 81 Gas pressure switch DGVC for VAx VRH
                                                            • 82 Gas pressure switch DGVCT for VAxT VRHT
                                                            • 83 Bypass valvepilot gas valve VAS 1
                                                              • 831 VAS 1 attached to VADVAGVAHVAV 1
                                                              • 832 VAS 1 attached to VADVAGVAHVAV 2 VADVAGVAHVAV 3
                                                              • 833 Flow rate
                                                                • 84 Bypass valvepilot gas valve VBY 8 for VADVAGVAHVAV 1
                                                                  • 841 Scope of delivery VBY 8I as bypass valve
                                                                  • 842 Scope of delivery VBY 8R as pilot gas valve
                                                                  • 843 Selection
                                                                  • 844 Type code
                                                                  • 845 Flow rate
                                                                  • 846 Technical data
                                                                    • 85 Tightness control TC 116V
                                                                    • 86 Pressure test points
                                                                    • 87 Cable gland set
                                                                    • 88 Seal set VA 1thinspndashthinsp3
                                                                    • 89 Differential pressure orifice
                                                                    • 810 Retaining frame
                                                                    • 811 Attachment block
                                                                    • 812 Gas control line
                                                                    • 813 Measuring orifice VMO
                                                                    • 814 Filter module VMF
                                                                    • 815 Fine-adjusting valve VMV
                                                                      • 9 Technical data
                                                                        • 91 VAD
                                                                        • 92 VAG
                                                                        • 93 VAH VRH
                                                                        • 94 VAV
                                                                        • 95 Safety-specific characteristic values for VAx 1thinspndashthinsp3
                                                                          • 951 Determining the PFHD value the λD value and the MTTFd value
                                                                          • 952 Calculating the PFHD and PFDavg
                                                                            • 96 Dimensions
                                                                              • 10 Converting units
                                                                              • 11 Maintenance cycles
                                                                              • 12 Glossary
                                                                                • 121 Diagnostic coverage DC
                                                                                • 122 Mode of operation
                                                                                • 123 Category
                                                                                • 124 Common cause failure CCF
                                                                                • 125 Fraction of undetected common cause failures β
                                                                                • 126 B10d value
                                                                                • 127 T10d value
                                                                                • 128 Hardware fault tolerance HFT
                                                                                • 129 Mean dangerous failure rate λD
                                                                                • 1210 Safe failure fraction SFF
                                                                                • 1211 Probability of dangerous failure PFHD
                                                                                • 1212 Mean time to dangerous failure MTTFd
                                                                                • 1213 Demand rate nop
                                                                                • 1214 Average probability of dangerous failure on demand PFDavg
                                                                                  • Feedback
                                                                                  • Contact
                                                                                      1. naechste_Seite 24
                                                                                      2. naechste Seite 18
                                                                                      3. naechste Seite 6
                                                                                      4. naechste Seite 16
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                                                                                      6. naechste Seite 25
                                                                                      7. naechste_Seite 11
                                                                                      8. naechste_Seite 17
                                                                                      9. fbArbeitspunkt_Min Ja
                                                                                      10. fbArbeitspunkt Ja
                                                                                      11. ftProgramm Standard-Programm
                                                                                      12. fz_kv
                                                                                      13. fz_pe 80
                                                                                      14. fz_pG 60
                                                                                      15. fzDelta_p_Soll 20
                                                                                      16. ftEinheit_Druck mbar
                                                                                      17. fatTyp [115]
                                                                                      18. fbArbeitspunkt_Min_2 Ja
                                                                                      19. fbArbeitspunkt_2 Ja
                                                                                      20. ftRegler_Typ VAG
                                                                                      21. ftProgramm_2 Standard-Programm
                                                                                      22. fz_kv_2
                                                                                      23. fatMedium [08]
                                                                                      24. fzDichte 08
                                                                                      25. ftEinheit_Dichte kgm3
                                                                                      26. fzV_Norm 30
                                                                                      27. ftEinheit_Volstrom m3h
                                                                                      28. fz_pe_2 80
                                                                                      29. fz_pG_2 60
                                                                                      30. fzDelta_p_Soll_2 20
                                                                                      31. ftEinheit_Druck2 [mbar]
                                                                                      32. ftEinheit_Geschw [ms]
                                                                                      33. fatTyp_2 [10954451150103322]
                                                                                      34. fbArbeitspunkt_Min_3 Ja
                                                                                      35. fbArbeitspunkt_3 Ja
                                                                                      36. ftProgramm_3 Standard-Programm
                                                                                      37. fz_kv_3
                                                                                      38. fz_pe_3 20
                                                                                      39. fz_pG_3 0
                                                                                      40. fzDelta_p_Soll_3 20
                                                                                      41. fatTyp_3 [123]
                                                                                      42. fatSchaltleistung [6363683]
                                                                                      43. fz_nop_Stunde 1
                                                                                      44. fz_nop_Jahr 8760
                                                                                      45. fzZyklus 3600
                                                                                      46. fzB10d 6363683
                                                                                      47. fzT10d 10
                                                                                      48. fzPFHd_1V 15714170551864384e-8
                                                                                      49. fzPFDavg_1V
                                                                                      50. ftGeeignet_1V PL d SIL 2
                                                                                      51. fzPFHd_2V 33505832253532625e-10
                                                                                      52. fzPFDavg_2V
                                                                                      53. ftGeeignet_2V PL e SIL 3
                                                                                      54. ftUebersicht Off
                                                                                      55. ftVerstaendlichkeit Off
                                                                                      56. ftFehlende_Info
                                                                                      57. ftUmfang Off
                                                                                      58. ftVerwendung_1 Off
                                                                                      59. ftVerwendung_2 Off
                                                                                      60. ftVerwendung_3 Off
                                                                                      61. ftVerwendung_4 Off
                                                                                      62. ftNavigation Off
                                                                                      63. ftTaetigkeitsbereich Off
                                                                                      64. ftBemerkung
                                                                                      65. Michael Rehkamp Elster Kromschroumlder>btnSenden
Page 19: VAD, VAG, VAV, VAH, VRH, VCD, VCG, VCV, VCH · PDF fileVAD, VAG, VAH, VAV, VRH, VCD, VCG, VCV, VCH · Edition 04.15 6 VAD VAD VAS 1 .1 Examples of application 1 .1 .1 Constant pressure

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 19

1 COM

2 NO

3 NC

3 1 5 Pressure regulator with gas solenoid valve VAx S position indicator with visual indicatorOpening when the pressure regulator is opened the posi-tion indicator switches The visual indicator is activated The ldquoopenrdquo signal is marked in red The double valve seat opens to release the volume of gasClosing the pressure regulator VAx is disconnected from the voltage supply and the closing spring presses the double valve disc on to the valve seat The position indicator is actuated The visual indicator is white for ldquoclosedrdquoThe actuator cannot be rotated on a pressure regulator with a position indicator and a visual indicatorNOTE NFPA 86 ndash the following must be taken into account as soon as the capacity of the pilot or main burner exceeds 117 kW (400000 BTUh) safety shut-off valve VASS must be fitted with a proof of closure overtravel switch with a visual position indicator and the burner-side pressure regulator with gas solenoid valve VAxS must also be fitted with a position indicator with visual indicator The closed position can be verified using the proof of closure switch of the gas solenoid valve VASS

Function

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 20

3 2 AnimationThe interactive animation shows the function of the valVario controls VADVAGVAHVAVClick on the picture The animation can be controlled using the control bar at the bottom of the window (as on a DVD player) To play the animation you will need Adobe Reader 7 or a newer version If you do not have Adobe Reader on your system you can download it from the Internet

Go to wwwadobecom click on ldquoAdobe Readerrdquo at the bottom of the page and follow the instructionsIf the animation does not start to play you can download it from the document library (wwwdocuthekcom) as an inde-pendent application

Function

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 21

3 3 Connection diagramWiring to EN 60204-1Connection diagram for VAxS with position indicator ndash see page 19 (Pressure regulator with gas solenoid valve VAxS position indicator with visual indicator)

3 3 1 VAx with M20 cable gland

L1 (+)

N (ndash)

3 3 2 VAx with plug

1 = N (-)

2 = L1 (+)

3 3 3 VAS with VADVAGVAHVAV with M20 cable glandL1V1 (+)

N (-)

L1V2 (+)

3 3 4 VAS with VADVAGVAHVAV with plug2 = L1V1 (+)

1 = N (-)

3 = L1V2 (+)

Function

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 22

4 Replacement possibilities for MODULINE pressure regulators with gas solenoid valve4 1 GVS GVI GVIB GVR and GVRH are to be replaced by VAD VAG VAG+VAS VAH and VAV

Type TypeGVS Pressure regulator with gas solenoid valve Pressure regulator with gas solenoid valve VADGVI Airgas ratio control with gas solenoid valve Airgas ratio control with gas solenoid valve VAG

GVIB Airgas ratio control with gas solenoid valve and bypass valve

Airgas ratio control with gas solenoid valve and bypass valve VAG+VAS

GVRH Flow rate regulator with gas solenoid valve Flow rate regulator with gas solenoid valve VAHGVR Variable airgas ratio control with gas solenoid valve Variable airgas ratio control with solenoid valve VAV115125 Flange 38 Size 115

Size 125 on request

115125 Flange frac12 Size 115

Size 125 Size 1 DN 15 115

115125 Flange frac34 Size 115

Size 125 Size 1 DN 20 120

115125 Flange 1 Size 115

Size 125 Size 1 DN 25 125

232240 Flange 1 Size 232

Size 240 on request

232240 Flange 1frac12 Size 232

Size 240 Size 2 DN 40 240

350 Flange 1frac12 Size 350 on request350 Flange 2 Size 350 Size 3 DN 50 350ML MODULINE + Rp internal thread connection fl anges Rp internal thread RTML MODULINE + NPT internal thread connection fl anges NPT internal thread N01 pu max 100 mbar (15 psig) pu max 500 mbar (7 psig) 02 200 mbar (3 psig) 500 mbar (7 psig)

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 23

Replacement possibilities for MODULINE pressure regulators with gas solenoid valve gt GVS GVI GVIB GVR and GVRH are to be replaced by VAD VAG VAG+VAS VAH and VAV

ContinuationType Type

Quick opening Quick opening NF1 Control ratio 11 Control ratio 11 K Mains voltage 24 V DC Mains voltage 24 V DC K

ndash 100 V AC PQ 120 V AC 120 V AC Q

ndash 200 V AC YT 220240 V AC 230 V AC W3 Electrical connection via terminals Electrical connection via terminals 6 Electrical connection via socket Electrical connection via socket 9 Metal terminal connection box Electrical connection via terminals S Position indicator Position indicator with visual indicator SG Position indicator for 24 V Position indicator for 24 V with visual indicator GM Suitable for biologically produced methane Suitable for biologically produced methane

Pressure test point at the inlet Pressure test point at the inlet and outlet Outlet pressure pd -25

Outlet pressure pd 25 ndash 25 mbar (1 ndash 10 WC)

2 ndash 90 mbar (08 ndash 36 WC) 20 ndash 50 mbar (8 ndash 20 WC) -5035 ndash 100 mbar (14 ndash 40 WC) -100Standard seat A

ExampleGVS 350ML01T3with Rp 2 connection flanges

ExampleVAD 350RNW-100A

with test points

= standard = available Pressure test points may be attached at the left- andor right-hand side Position indicator with visual indicator can be attached at the left- or right-hand side

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 24

∆p [i

nch

WC]

Qn [SCFH]100 400 600 4000 60001000 200020 30 40 50 200 3006015 80

1

08

1

2

3

4

56

8

10

20

30

40

5060

80

100

200

∆p [m

bar]

5

8

3

20

10

30

40

80

60

300

400

50

04 06 1 2 3 4 5 808 10 20 30 402

03 60 100 200

100

200

500

1

3

2

04 06 08 1 2 3 4 5 6 8 10 20 30 40

04 06 08 1 2 3 4 5 6 8 10

200

80 10020 3003

03Qn [m3h]

02

50 60 80 100

40 50 60

VAD

115

B

VAD

120

AVA

D 12

5A

P1P2

VAD

240

AVA

D 35

0A

= natural gas (ρ = 080 kgm3) = propane (ρ = 201 kgm3) = air (ρ = 129 kgm3)

The characteristic flow rate curves have been meas-ured with the specified flanges and a fitted strainer If two or more valves are combined the pressure loss of each additional valve drops by approx 5

metric imperial

Enter densityFlow rate Qn

Inlet pressure pu

Outlet pressure pd

Product RV v

Pressure loss ∆p

∆pmin

5 Flow rate5 1 Selection example for VADNatural gas Flow rate Qmax = 30 m3h Inlet pressure pu = 80 mbar Outlet pressure pd = 60 mbarThe desired control ratio from high-fire to low-fire rate is RV = 101High fire ∆p = pu - pd = 20 mbar Point P1Low fire Point P2 Qmin = 26 m3h at ∆p = 20 mbar RV = Qmax Qmin = 1151

Point P1 and point P2 must be within the working range of a unit size We recommend that you select the smallest size to achieve the best control properties

5 1 1 Calculate VAD

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 25

∆p [i

nch

WC]

Qn [SCFH]100 400 600 4000 60001000 200020 30 40 50 200 3006015 80

1

08

1

2

3

4

56

8

10

20

30

40

5060

80

100

200

∆p [m

bar]

5

8

3

20

10

30

40

80

60

300

400

50

04 06 1 2 3 4 5 808 10 20 30 402

03 60 100 200

100

200

500

1

3

2

04 06 08 1 2 3 4 5 6 8 10 20 30 40

04 06 08 1 2 3 4 5 6 8 10

200

80 10020 3003

03Qn [m3h]

02

50 60 80 100

40 50 60

= pd min lt 5 mbar

VAG

VxH

VAV

115

BVA

GV

xHV

AV 12

0A

VAG

VxH

VAV

125

A

P1

P2

VAG

VxH

VAV

240

AVA

GV

xHV

AV 3

50A

= natural gas (ρ = 080 kgm3) = propane (ρ = 201 kgm3) = air (ρ = 129 kgm3)

The characteristic flow rate curves have been meas-ured with the specified flanges and a fitted strainer If two or more valves are combined the pressure loss of each additional valve drops by approx 5

5 2 Selection example for VAG VAH VRH VAV Natural gas Flow rate Qmax = 30 m3h Inlet pressure pu = 80 mbar Outlet pressure pd max VAG = 60 mbarThe desired control ratio from high-fire to low-fire rate is RV = 101High fire ∆p = pu - pd max = 20 mbar Point P1Low fire pd min = pd max RV2 = 06 mbar Qmin = Qmax RV = 3 m3h ∆p = pu - pd min = 794 mbar Point P2 select VAG 120APoint P1 and point P2 must be within the working range of a unit size We recommend that you select the smallest size to achieve the best control properties

metric imperial

Enter densityFlow rate Qn

Inlet pressure pu

Outlet pressure pd

Product RV v

5 2 1 Calculate VAG VxH VAV

Pressure loss ∆p

∆pmin

Flow rate

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 26

∆p [i

nch

WC]

Qn [SCFH]100 400 600 4000 60001000 200020 30 40 50 200 3006015 80

1

08

1

2

3

4

56

8

10

20

30

40

5060

80

100

200

∆p [m

bar]

5

8

3

20

10

30

40

80

60

300

400

50

04 06 2 3 4 5 808 10 20 30 402

03 60 100 200

100

200

500

1

3

2

04 06 08 1 2 3 4 5 6 8 10 20 30 40

04 06 08 1 2 3 4 5 6 8 10

200

80 10020 3003

03Qn [m3h]

02

50 60 80 100

40 50 60

VAG

115

N

P1VAG

125

N

VAG

120

N

VAG

240

NP2

VAG

350

N

= natural gas (ρ = 080 kgm3) = propane (ρ = 201 kgm3) = air (ρ = 129 kgm3)

The characteristic flow rate curves have been meas-ured with the specified flanges and a fitted strainer If two or more valves are combined the pressure loss of each additional valve drops by approx 5

5 3 Selection example for zero governor VAG NNatural gas Flow rate Qmax = 30 m3h Inlet pressure pu = 20 mbar Outlet pressure pd = 0 mbar (atmospheric pressure)The desired control ratio from high-fire to low-fire rate is RV = 101High fire ∆p = pu - pd max = 20 mbar Point P1Low fire Point P2 Qmin = 24 m3h at ∆p = 20 mbar RV = Qmax Qmin = 1231Point P1 and point P2 must be within the working range of a unit size We recommend that you select the smallest size to achieve the best control properties

metric imperial

Enter densityFlow rate Qn

Inlet pressure pu

Outlet pressure pd

Product RV

5 3 1 Calculate VAG N

Pressure loss ∆p

∆pmin

Flow rate

v

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 27

6 Selection6 1 Selection table for pressure regulator with solenoid valve VAD

Accessories right Accessories left

Type1) T R N F N K P Q Y W S2) G2) R2) L2) M20

cab

le g

land

Plug

with

soc

ket

Plug

with

out s

ocke

t

-25-50 -100 A B Scre

w p

lug

Pres

sure

test

poi

nt

DG

17V

C 3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

Scre

w p

lug

Pres

sure

test

poi

nt

DG

17V

C 3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

VAD 115

VAD 120

VAD 125

VAD 240

VAD 350

= standard = available1) The following nominal inlet fl ange diameters are also available size 1 with nominal diameter DN 10 size 2 with nominal diameters DN 25 DN 32 and DN 50 size 3 with nominal diameters DN 40 and DN 652) Position indicator and bypasspilot gas valve cannot be fi tted together on the same side3) Specify the test point for inlet pressure pu or outlet pressure pdHelp for selecting the pressure regulator VAD can be found on the ProFi DVD wwwkromschroedercom Products DVD Product fi nder ldquoProFirdquo

Order exampleVAD 240RNW-100A

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 28

Selection

6 2 Type code for VADCode DescriptionVAD Pressure regulator with solenoid valve1 ndash 3 SizeT T-product10 ndash 65 Nominal inlet and outlet diameterRNF

Rp internal threadNPT internal thread

ISO fl angeN Quick opening quick closingKPQYW

Mains voltage 24 V DCMains voltage 100 V AC 5060 HzMains voltage 120 V AC 5060 HzMains voltage 200 V AC 5060 HzMains voltage 230 V AC 5060 Hz

SG

Position indicator with visual indicatorPosition indicator for 24 V with visual indicator

RL

Viewed from the right (in the direction of fl ow)Viewed from the left (in the direction of fl ow)

-25-50-100

Outlet pressure pd 25 ndash 25 mbar20 ndash 50 mbar

35 ndash 100 mbarAB

Standard valve seatReduced valve seat

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 29

Selection

6 3 Selection table for airgas ratio control with solenoid valve VAG flow rate regulators VAH VRH

Type1) T R N F N K P Q Y W S2) G2) R2) L2) M20

cab

le g

land

Plug

with

soc

ket

Plug

with

out s

ocke

t

A B E K A N Scre

w p

lug

Pres

sure

test

poi

ntD

G 1

7VC

3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

Scre

w p

lug

Pres

sure

test

poi

ntD

G 1

7VC

3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

VAG 115 VAG 120 VAG 125 VAG 240 VAG 350

VAH 115 VAH 120 VAH 125 VAH 240 VAH 350

VRH 115 VRH 120 VRH 125 VRH 240 VRH 350

= standard = available1) The following nominal inlet fl ange diameters are also available size 1 with nominal diameter DN 10 size 2 with nominal di-

ameters DN 25 DN 32 and DN 50 size 3 with nominal diameters DN 40 and DN 652) Position indicator and bypasspilot gas valve cannot be fi tted together on the same side3) Specify the test point for inlet pressure pu or outlet pressure pdHelp for selecting the regulators can be found on the ProFi DVD wwwkromschroedercom Products DVD Product fi nder ldquoProFirdquo

Order exampleVAG 240RNWAE

Accessories right Accessories left

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 30

Selection

6 4 Type code for VAG VAH VRHCode DescriptionVAGVAHVRH

Airgas ratio control with solenoid valveFlow rate regulator with solenoid valve

Flow rate regulator1 ndash 3 SizeT T-product15 ndash 50 Nominal inlet and outlet diameterRNF

Rp internal threadNPT internal thread

ISO fl angeN1) Quick opening quick closingK1)

P1)

Q1)

Y1)

W1)

Mains voltage 24 V DCMains voltage 100 V AC 5060 HzMains voltage 120 V AC 5060 HzMains voltage 200 V AC 5060 HzMains voltage 230 V AC 5060 Hz

S1)

G1)Position indicator with visual indicator

Position indicator for 24 V with visual indicatorRL

Viewed from the right (in the direction of fl ow)Viewed from the left (in the direction of fl ow)

AB

Standard valve seatReduced valve seat

EKAN

Connection kit for air control pressure psaVAG VAH VRH compression fi tting

VAG plastic hose couplingVAG VAH VRH NPT 18 adapter

VAG zero governor1) Only available for VAG VAV VAH

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 31

6 5 Selection table for variable airgas ratio control with solenoid valve VAVAccessories right Accessories left

Type1) T R N F N K P Q Y W S2) G2) R2) L2) M20

cab

le g

land

Plug

with

soc

ket

Plug

with

out s

ocke

t

A B E K A Scre

w p

lug

Pres

sure

test

poi

ntD

G 1

7VC

3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

Scre

w p

lug

Pres

sure

test

poi

ntD

G 1

7VC

3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

VAV 115

VAV 120

VAV 125

VAV 240

VAV 350

= standard = available1) The following nominal inlet fl ange diameters are also available size 1 with nominal diameter DN 10 size 2 with nominal diameters DN 25 DN 32 and DN 50 size 3 with nominal diameters DN 40 and DN 652) Position indicator and bypasspilot gas valve cannot be fi tted together on the same side3) Specify the test point for inlet pressure pu or outlet pressure pdHelp for selecting the variable airgas ratio control VAV can be found on the ProFi DVD wwwkromschroedercom

Products DVD Product fi nder ldquoProFirdquo

Order exampleVAV 240RNWAK

Selection

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 32

Selection

6 6 Type code for VAVCode DescriptionVAV Variable airgas ratio control with solenoid valve1 ndash 3 SizeT T-product15 ndash 50 Nominal inlet and outlet diameterRNF

Rp internal threadNPT internal thread

ISO fl angeN Quick opening quick closingKPQYW

Mains voltage 24 V DCMains voltage 100 V AC 5060 HzMains voltage 120 V AC 5060 HzMains voltage 200 V AC 5060 HzMains voltage 230 V AC 5060 Hz

SG

Position indicator with visual indicatorPosition indicator for 24 V with visual indicator

RL

Viewed from the right (in the direction of fl ow)Viewed from the left (in the direction of fl ow)

AB

Standard valve seatReduced valve seat

EKA

Connection kit for air control pressure psa and combus-tion chamber control pressure psc

compression fi ttingplastic hose coupling

NPT 18 adapter

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 33

Selection

6 7 AccessoriesModularly configurable withndash Screw plugsndash Pressure test pointsndash Pressure switch DGVC for inlet

andor outlet pressurendash Tightness control TCndash Bypasspilot gas valve VBY 8 for

size 1ndash Bypasspilot gas valve VAS 1For further information see page 37 (Accessories)

Position indicator

Plug with socket

Plug

Screwplugs

Pressuretest points

Pressure switch DGC Tightness

control TC

Bypasspilot gas valve VBY 8 for size 1

Bypasspilot gas valve VAS 1

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 34

7 Project planning informationDo not store or install the unit in the open airThe inlet pressure pu and the outlet pressure pd can be meas-ured on both sides of the valve body To increase the control accuracy an external impulse line can be connected instead of the pressure test point pd

VAD

pu

pd

(psa)

VAGpd

pu

psa

psa

VAD measurement point for the gas outlet pressure pd on the regulator body A combustion chamber control line (psc) can be connected to connection psa for maintaining a constant burner capacityVAG additional measurement point for the air control pressure psa on the regulator body

VAV

psapsc

pu

pd

VAH VRH

pu

pd-

pdpsa-

psa

VAV measurement point for the outlet pressure pd on the regulator bodyVAH additional measurement points for the outlet pressure pd- and the air control pressure psapsa- on the regulator body

7 1 Installation

GFK

VAGVAH

GFKVAD

Sealing material and thread cuttings must not be allowed to get into the valve housing Install a filter upstream of every system

gt20 mmgt0 79

The unit must not be in contact with masonry Minimum clear-ance 20 mm (079 inches)Ensure that there is sufficient space for installation and ad-justment

le +100 degCle +212 degF

The solenoid body heats up during operation ndash depending on ambient temperature (max 60degC140degF) and intrinsic heating (approx 40degC104degF)

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 35

In the case of double solenoid valves the position of the con-nection box can only be changed by removing the actuator and reinstalling it offset by 90deg or 180deg

If more than three valVario controls are installed in line the controls must be supported

The seals in some gas compression fittings are approved for temperatures of up to 70degC (158degF) This temperature limit will not be exceeded if the flow through the pipe is at least 1 msup3h (3531 SCFH) of gas and the maximum ambient temperature is 50degC (122degF)

7 1 1 Installation position

pu ge 80 mbar(80 hPa32 WC)

VAD VAG VAH VRH VAV

In humid environments black solenoid actuator in the vertical upright position only

VAD VAG VAH VRH black solenoid actuator in the vertical upright position or tilted up to the horizontal not upside downVAG VAH horizontal position only if pu ge 80 mbar (32 WC))VAV installation in the vertical position only black solenoid actuator in the vertical upright positionTo ensure that the airgas ratio control VAG the flow rate regulator VAH VRH or the variable airgas ratio control VAV can react quickly when the load is changed the impulse line for the air control pressure psa and for VAV the impulse line for the combustion chamber control pressure psc should be kept as short as possible The tube internal diameter for the impulse line must always be ge 39 mm (015)

VAH VRHIt is not permitted to install a gas solenoid valve VAS down-stream of flow rate regulator VAH VRH and upstream of fine-adjusting valve VMV The VAS would no longer be able to perform its function as a second safety valve if installed in the above-mentioned position

M

VMV

VAH

VASVAS

pd-

psa-psa

VMV

VAH pd-

psa-psa

The measuring orifice in the air line for impulse lines psa and psa- must always be installed downstream of the air control valve

Project planning information gt Installation

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 36

VAVThe impulse line for the combustion chamber control pres-sure psc must be fitted so that no condensation can enter the pressure regulator but rather flows back into the combustion chamber

7 2 Setting the low-fire rate on VAG VAH VRH VAV

-10 +05-05

ndash

+1

-15

mbar

+15

06

1 152

3

N V

+ +ndash

+30 -15+15

ndash

-3

+5

mbar

-5

N

+

VAG VAH VRH VAV

If the burner operates at low-fire rate the gasair mixture can be changed using the parallel shift of the characteristic curve by turning the adjusting screw ldquoNrdquoAdjusting range at low fire VAG VAH VRH -5 to +5 mbar (-195 to +195 WC) VAV -15 to +15 mbar (-06 to +06 WC)

7 3 Setting the high-fire rate on VAVTo set the high-fire rate the transmission ratio is changed us-ing the adjusting screw ldquoVrdquo until the required flue gas values are achievedTransmission ratio V = pdpsa = 061 to 31The settings N and V can influence each other and must be repeated if necessary

+N+V

-V

-N

VAV

psa [mbar]

p d [m

bar]

7 3 1 CalculationWith no connection to the combustion chamber control pres-sure psc pd = V times psa + NWith connection to the combustion chamber control pressure psc (pd - psc) = V times (psa - psc) + N

Project planning information

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 37

pu pd

21579

4836

085310

189

142

8 Accessories8 1 Gas pressure switch DG VC for VAx VRHType Adjusting range [mbar]DG 17VC 2 to 17DG 40VC 5 to 40DG 110VC 30 to 110DG 300VC 100 to 300

Scope of delivery 1 times pressure switch for gas 2 times retaining screws 2 times sealing rings

8 2 Gas pressure switch DG VCT for VAx T VRH TType Adjusting range [WC]DG 17VCT 08 to 68DG 40VCT 2 to 16DG 110VCT 12 to 44DG 300VCT 40 to 120

Scope of delivery 1 times gas pressure switch with AWG 18 connection wires 2 times retaining screws 2 times sealing ringsMonitoring the inlet pressure pu the electrical plug of the pressure switch for gas points towards the inlet flangeMonitoring the outlet pressure pd the electrical plug of the pressure switch for gas points towards the outlet flange

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 38

A BC

D

FE

ACD

F

B

E

8 3 Bypass valvepilot gas valve VAS 18 3 1 VAS 1 attached to VADVAGVAHVAV 1Scope of delivery A 1 times bypasspilot gas valve VAS 1 B 4 times O-rings C 4 times double nuts D 4 times connection parts E 1 times mounting aidBypass valve VAS 1 F 2 times connection pipes if the bypass valve has a blind flange

at the outlet sidePilot gas valve VAS 1 F 1 times connection pipe 1 times sealing plug if the pilot gas valve

has a threaded flange at the outlet side

Accessories

8 3 2 VAS 1 attached to VADVAGVAHVAV 2 VADVAGVAHVAV 3Scope of delivery A 1 times bypasspilot gas valve VAS 1 B 4 times O-rings C 4 times spacer sleeves D 4 times connection parts E 1 times mounting aidBypass valve VAS 1 F 2 times connection pipes if the bypass valve has a blind flange

at the outlet sidePilot gas valve VAS 1 F 1 times connection pipe 1 times sealing plug if the pilot gas valve

has a threaded flange at the outlet side

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 39

2

3

456

810

20

30

405060

80100

∆p [m

bar]

005 01 02 03 05 08 1 2 3 4 51

3

2

Qn [m3h]

1

01

02

03

0405

08

003

002

6 8 10

005 01 02 03 05 08 1 2 3 4 5003 6 8 10

20

005 01 02 03 05 08 1 2 3 4 5003 6 8 10 20

30

∆p [i

nch

WC]

1

2

3

456

810

20

30

40

04

004

006

00801

02

03

0506

08

Qn [SCFH]10 40 60 100 200 3001 500 10002 3 4 5

120 306 8

21 3 4 5 6 7 8 910

8 3 3 Flow rate

The characteristic flow rate curves have been measured for bypass valve VAS 1 with connection pipe diameter 1 to 10 mm (004 to 04) and for the pilot gas valve with 10 mm (04) connection pipe

Bypass valve connection pipe diameter [mm]

Pilo

t gas

val

ve 1

0 m

m (0

4)

conn

ectio

n pi

pe d

iam

eter

Accessories gt Bypass valvepilot gas valve VAS 1

= natural gas (ρ = 080 kgm3) = propane (ρ = 201 kgm3) = air (ρ = 129 kgm3)

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 40

Accessories

8 4 Bypass valvepilot gas valve VBY 8 for VADVAGVAHVAV 1

B

C

AVBY 8

VAx 1

55

(217)40(157)

70 (276)

80(315)

Rp frac14(pilot gas valve)

For mounting on VAD VAG VAH VAV 1 and double solenoid valve VCD VCG VCH VCV 1

8 4 1 Scope of delivery VBY 8I as bypass valveA 1 times bypass valve VBY 8IB 2 times retaining screws with 4 times O-rings both retaining screws

have a bypass orificeC 1 times grease for o-rings

8 4 2 Scope of delivery VBY 8R as pilot gas valveA 1 times pilot gas valve VBY 8RB 2 times retaining screws with 5 x O-rings one retaining screw

has a bypass orifice (2 x O-rings) the other does not (3 x O-rings)

C 1 times grease for O-rings

8 4 3 SelectionType I R W Q K 6L -R -L E B D 05

VBY 8

Order exampleVBY 8RW6L-LED

8 4 4 Type codeCode DescriptionVBY Gas solenoid valve8 Nominal sizeIR

For internal gas pick-up as bypass valveFor external gas pick-up as pilot gas valve

KQW

Mains voltage 24 V DC Mains voltage 120 V AC 5060 HzMains voltage 230 V AC 5060 Hz

6L Electrical connection via plug and socket with LED-R-L

Attachment side of main valve right-hand sideAttachment side of main valve left-hand side

EB

Attached to the VAxEnclosed (separate packing unit)

05D

Nozzle diameter = 05 mm (002)Flow adjustment

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 41

2

01

02

03

05

081

3

456

810

20

30

405060

80100

∆p [m

bar]

1

3

201 02 03 05 1 2 3001 003 4

Qn [m3h]

02 03 05 1 2

01 02 05

002 006

002

002 006 1

0010006 005 01

001

0003

0006 2 3

VBY 8DVBY 805

∆p [i

nch

WC]

1

2

3

456

810

20

30

40

040506

08

1

Qn [SCFH]10 40 60 1005 2081 2 30402

01

02

03

004005006

008

Adjusting range

8 4 5 Flow rateVBY 8 D

+

-

The flow rate can be set by turning the flow rate restrictor (4 mm016 Allen screw) frac14 of a turn Flow rate 10 to 100

VBY 8 05The flow is routed through a 05 mm (002) nozzle and thus has a fixed characteristic flow rate curve Adjustment is not possible

8 4 6 Technical dataInlet pressure pu max 500 mbar (7 psig)Ambient temperature 0 to +60degC (32 to 140degF) no condensation permittedStorage temperature 0 to +40degC (32 to 104degF) no condensation permittedPower consumption 24 V = 8 W 120 V = 8 W 230 V = 95 WEnclosure IP 54

Accessories gt Bypass valvepilot gas valve VBY 8 for VADVAGVAHVAV 1

= natural gas (ρ = 080 kgm3) = propane (ρ = 201 kgm3) = air (ρ = 129 kgm3)

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 42

TC 116VB C

56(22)

49(193)

27(106)

A

A

VCx 1 VCx 2VCx 3

8 5 Tightness control TC 116Vfor VAx 1 ndash 3An adapter plate is required to attach the tightness control to the right- or left-hand side of the pressure regulator with gas solenoid valveScope of delivery A 1 times adapter plate B 2 times O-rings C 2 times retaining screwsFor attachment to left-hand side Order No 74922391 right-hand side Order No 74921995

8 6 Pressure test pointsTest points to check the inlet pressure pu and outlet pressure pdScope of delivery 1 x pressure test points with 1 x profiled sealing rings Order No 74923390

8 7 Cable gland setWhen wiring a double solenoid valve with pressure regula-tor VCx the connection boxes are to be connected using a cable gland setThe cable gland set can only be used if the connection boxes are at the same height and on the same side and if both valves are equipped either with or without a proof of closure switchVA 1 Order No 74921985 VA 2 Order No 74921986 VA 3 Order No 74921987

Accessories

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 43

A B

D

C

Accessories

8 9 Differential pressure orifice

Size PipeDN

Differential pressure orifi cewith outlet dia

1 15 17 mm 0671 20 25 mm 0981 25 30 mm 1182 40 46 mm 1813 50 58 mm 228

If pressure regulator VADVAGVAV 1 is retrofitted upstream of gas solenoid valve VAS 1 a DN 25 differential pressure orifice with outlet opening d = 30 mm (118) must be inserted at the outlet of the pressure regulatorIn the case of pressure regulator VAx 115 or VAx 120 the DN 25 differential pressure orifice must be ordered separately and retrofitted Order No 74922240

8 8 Seal set VA 1 ndash 3VA 1 Order No 74921988 VA 2 Order No 74921989 VA 3 Order No 74921990Scope of deliveryA 1 times double block seal B 2 times O-rings (flange) C 2 times O-rings (pressure switch) for pressure test pointscrew plug D 2 times sealing rings (flat sealing) and 2 times profiled sealing rings

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 44

BA

C

pd-

8 11 Attachment blockFor locked installation of pressure gauge and other acces-soriesScope of delivery A 1 times attachment block B 2 times self-tapping screws for installation C 2 times O-rings

Accessories

8 10 Retaining frameIn the event that a pressure regulator VAx is installed at a later point upstream of a gas solenoid valve VAS a measur-ing orifice VMO or a fine-adjusting valve VMV the retaining frame must be fitted at the inlet of the second device in order to fasten the differential pressure orifice at the regulator outlet Order the retaining frame separatelyRetaining frame for Size 1 Order No 74923029 Size 2 Order No 74923030 Size 3 Order No 74923031

8 12 Gas control lineFine-adjusting valve VMV can be installed on the flow rate regulator VAH for fine adjustment of the gas flow rateThe gas control line for gas outlet pressure pd- is available with 2 18 compression fittingsSize 1 Order No 74924458 Size 2 Order No 74924459

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 45

8 13 Measuring orifice VMOThe measuring orifice VMO is designed to reduce the gas and air flow rates and is installed downstream of the valVario control The measuring orifice is available with Rp internal thread (NPT internal thread) or flange to ISO 7005See wwwdocuthekcom Elster Kromschroumlder Krom-schroumlder LBE Products 03 Valves and butterfly valves valVario accessories Type of document Technical Informa-tion VMO

Accessories

8 14 Filter module VMFUsing the filter module VMF the gas flow upstream of the gas solenoid valve VAS and the airgas ratio control is cleaned The filter module is available with Rp internal thread (NPT internal thread) or flange to ISO 7005 and can also be supplied with fitted pressure switch as an optionSee wwwdocuthekcom Elster Kromschroumlder Krom-schroumlder LBE Products 03 Valves and butterfly valves valVario accessories Type of document Technical Informa-tion VMF

8 15 Fine-adjusting valve VMVThe flow rate is set using the fine-adjusting valve VMV The fine-adjusting valve is available with Rp internal thread (NPT internal thread) or flange to ISO 7005See wwwdocuthekcom Elster Kromschroumlder Krom-schroumlder LBE Products 03 Valves and butterfly valves valVario accessories Type of document Technical Infor-mation VMV

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 46

9 Technical dataGas types natural gas LPG (gaseous) biologically produced methane (max 01 -by-vol H2S) or clean air other gases on request The gas must be clean and dry in all temperature conditions and must not contain condensateCE and FM approved UL listed max inlet pressure pu 10 ndash 500 mbar (4 ndash 200 WC) FM approved (230 V AC 120 V AC 24 V DC) non opera-tional pressure 700 mbar (10 psig)ANSICSA approved (230 V AC 120 V AC 24 V DC) up to 350 mbar (5 psig)Opening time of the solenoid valve quick opening le 05 s Closing time quick closing lt 1 sMedium and ambient temperatures -20 to +60degC (-4 to +140degF) no condensation permittedStorage temperature -20 to +40degC (-4 to +104degF)Enclosure IP 65Valve housing aluminium valve seal NBRConnection flanges with internal thread Rp to ISO 7-1 NPT to ANSIASMESafety valve Class A to EN 161 Factory Mutual Research Class 7400 Process Control Valves (230 V AC 120 V AC 24 V DC) ANSI Z2121 and CSA 65 ANSI Z2118 and CSA 63Control class A to EN 88-1Control range up to 101

Mains voltage 230 V AC +10-15 5060 Hz 200 V AC +10-15 5060 Hz 120 V AC +10-15 5060 Hz 100 V AC +10-15 5060 Hz 24 V DC plusmn20Duty cycle 100Power factor of the solenoid coil cos φ = 09Power consumption

Type Voltage Power

VAx 1

24 V DC 25 W ndash100 V AC 25 W (26 VA)120 V AC 25 W (26 VA)200 V AC 25 W (26 VA)230 V AC 25 W (26 VA)

VAx 2 VAx 3

24 V DC 36 W ndash100 V AC 36 W (40 VA)120 V AC 40 W (44 VA)200 V AC 40 W (44 VA)230 V AC 40 W (44 VA)

VBY24 V DC 8 W ndash

120 V AC 8 W ndash230 V AC 95 W ndash

Cable gland M20 times 15Electrical connection cable with max 25 mm2 (AWG 12) or plug with socket to EN 175301-803

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 47

Position indicator contact rating

Type Voltage Min current(resistive load)

Max current(resistive load)

VAxS VCxS 12 ndash 250 V AC 5060 Hz 100 mA 3 AVAxG VCxG 12 ndash 30 V DC 2 mA 01 A

Position indicator switching frequency max 5 times per minute

Switching current [A]

Switching cyclescos φ = 1 cos φ = 06

01 500000 50000005 300000 250000

1 200000 1000003 100000 ndash

Limited to max 200000 cycles for heating systems

9 1 VADOutlet pressure pd VAD-25 25 ndash 25 mbar (1 ndash 10 WC) VAD-50 20 ndash 50 mbar (8 ndash 20 WC) VAD-100 35 ndash 100 mbar (14 ndash 40 WC)Combustion chamber control pressure psc (connection psa)

-20 to +20 mbar (-78 to +78 WC)

VAD

pu

pd

(psa)

9 2 VAGOutlet pressure pd 05 ndash 100 mbar (02 ndash 40 WC)Air control pressure psa 05 ndash 100 mbar (02 ndash 40 WC)

Adjusting range at low fire plusmn5 mbar (plusmn2 WC)Transmission ratio of gas to air 11The inlet pressure must always be higher than the air control pressure psa + pressure loss ∆p + 5 mbar (2 WC)

VAGpd

pu

psa

psa

VAGK 1 x 18 coupling for plastic hose (internal dia 39 mm (015) external dia 61 mm (024)) or VAGE 1 x 18 compression fitting for 6 times 1 tube or VAGA 1 x NPT 18 adapter or VAGN zero governor with breathing orifice

9 3 VAH VRHAir control pressure psa 06 ndash 100 mbar (024 ndash 40 WC) Differential air pressure ∆psa (psa - psa-) 06 ndash 50 mbar (024 ndash 197 WC) Differential gas pressure ∆pd (pd - pd-) 06 ndash 50 mbar (024 ndash 197 WC)Transmission ratio of gas to air 11The inlet pressure must always be higher than the differen-tial air pressure ∆psa + pressure loss ∆p + max gas pres-sure on burner + 5 mbar (2 WC)Adjusting range at low fire plusmn5 mbar (plusmn2 WC)

Technical data

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 48

VAHVRH

pd-

pu

psa-

psa

Connection of the air control pressure psaVAHE VRHE 3 x 18 compression fitting for 6 times 1 tube or VAHA VRHA 3 x NPT 18 adapter

9 4 VAVOutlet pressure pd 05 ndash 30 mbar (02 ndash 117 WC)Air control pressure psa 04 ndash 30 mbar (015 ndash 117 WC)Combustion chamber control pressure psc

-20 to +20 mbar (-78 to +78 WC)Min control pressure differential psa - psc 04 mbar (015 WC)Min pressure differential pd - psc 05 mbar (02 WC)Adjusting range at low fire plusmn15 mbar (plusmn06 WC)Transmission ratio of gas to air 061 to 31The inlet pressure pu must always be higher than the air control pressure psa times transmission ratio V + pressure loss ∆p + 15 mbar (06 WC)

pu

pd psapsc

VAV

VAVK 2 x plastic hose couplings (internal dia 39 mm (015) external dia 61 mm (024)) or VAVE 2 x 18 compression fitting for 6 times 1 tube or VAVA 2 x NPT 18 adapter

Technical data

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 49

9 5 Safety-specific characteristic values for VAx 1 ndash 3For SILSuitable for Safety Integrity Level SIL 1 2 3

Diagnostic coverage DC 0

Type of subsystem Type A to EN 61508-2 74312

Operating mode High demand mode pursu-ant to EN 61508-4 3512

For PLSuitable for Performance Level PL a b c d e

Category B 1 2 3 4Common cause failure CCF gt 65Application of essential safety requirements Satisfied

Application of tried-and-tested safety requirements Satisfied

For SIL and PL

B10d value

Operating cyclesVAD VAG VAV VAH 1 10094360VAD VAG VAV VAH 2 8229021VAD VAG VAV VAH 3 6363683

Hardware fault tolerance (1 valve) HFT 0

Hardware fault tolerance (2 valves) HFT 1

Safe failure fraction SFF gt 90Fraction of undetected com-mon cause failures β ge 2

Max service life under operating conditions10 years after date of production plus max 12 year in stor-age prior to first use or once the given number of operating cycles has been reached depending on which is achieved firstThe devices are suitable for single-channel systems (HFT = 0) up to SIL 2PL d and up to SIL 3PL e when two re-dundant valves are installed in a double-channel architecture (HFT = 1) provided that the complete system complies with the requirements of EN 61508ISO 13849

For a glossary of terms see page 53 (Glossary)

Technical data

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 50

nop 1hnop 1a

sB10d

T10d aPFHD (1 VAx) 1h

PFHD (2 VAx) 1h

PFDavg (1 VAx)

PFDavg (2 VAx)

Technical data gt Safety-specific characteristic values for VAx 1 ndash 3

9 5 1 Determining the PFHD value the λD value and the MTTFd value

PFHD = λD = x nop= 1MTTFd

01B10d

PFDavg = x λD x 24 x 365 x T10d 12

Type

Cycle time

suitable for

suitable for

PFHD = Probability of dangerous failure (HDM = high de-mand mode) [1hour]PFDavg = Average probability of dangerous failure on de-mand (LDM = low demand mode)λD = Mean dangerous failure rate [1hour]MTTFd = Mean time to dangerous failure [hours]nop = Demand rate (mean number of annual operations) [1hour]

9 5 2 Calculating the PFHD and PFDavg

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 51

VAD VAG VAH VAV

H1

Rp frac14(NPT frac14)

H2

E

LF

F

H4

H3

B

VAxS VAxF

L2G

G

Technical data

9 6 Dimensions

Type

Connec-tion Dimensions

WeightRpNPT DN

L L2 E F G H1 H2 H3 H4 Bmm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch kg lbs

VAx 115 12 15 75 29 ndash ndash 75 29 15 06 ndash ndash 143 56 82 32 161 63 117 46 97 38 18 40VAH 115 12 15 75 29 ndash ndash 75 29 15 06 ndash ndash 143 56 100 39 161 63 135 53 97 38 2 44VAx 120 34 20 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 82 33 161 63 117 46 97 38 19 42VAH 120 34 20 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 100 39 161 63 135 53 97 38 21 46VAx 125 1 25 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 82 33 161 63 117 46 97 38 19 42VAH 125 1 25 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 100 39 161 63 135 53 97 38 21 46VAx 240 112 40 128 50 200 79 85 33 29 11 66 26 170 67 112 44 191 75 162 64 125 49 44 97VAH 240 112 40 128 50 200 79 85 33 29 11 66 26 170 67 132 52 191 75 182 72 125 49 47 104VAx 350 2 50 155 61 230 91 85 33 36 14 74 29 180 70 135 53 201 79 196 77 160 63 61 134VAH 350 2 50 155 61 230 91 85 33 36 14 74 29 180 70 156 61 201 79 217 85 160 63 64 141

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 52

10 Converting unitssee wwwadlatusorg

11 Maintenance cyclesAt least once per annum at least twice per annum for biologi-cally produced methaneIf the flow rate drops clean the strainer

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 53

12 Glossary12 1 Diagnostic coverage DCMeasure of the effectiveness of diagnostics which may be determined as the ratio between the failure rate of detected dangerous failures and the failure rate of total dangerous failuresNOTE Diagnostic coverage can exist for the whole or parts of a safety-related system For example diagnostic cover-age could exist for sensors andor logic system andor final elements Unit see EN ISO 13849-12008

12 2 Mode of operationHigh demand mode or continuous modeOperating mode where the frequency of demands for opera-tion made on a safety-related system is greater than one per year or greater than twice the proof-test frequencysee EN 61508-42008

12 3 CategoryClassification of the safety-related parts of a control system in respect of their resistance to faults and their subsequent behaviour in the fault condition and which is achieved by the structural arrangement of the parts fault detection andor by their reliability see EN ISO 13849-12008

12 4 Common cause failure CCFFailures of different items resulting from a single event where these failures are not consequences of each othersee EN ISO 13849-12008

12 5 Fraction of undetected common cause failures β Fraction of undetected failures of redundant components due to a single event whereby these failures are not based on mutual causesNOTE β is expressed as a fraction in the equations and as a percentage elsewheresee EN 61508-62010

12 6 B10d valueMean number of cycles until 10 of the components fail dan-gerouslysee EN ISO 13849-12008

12 7 T10d valueMean time until 10 of the components fail dangerouslysee EN ISO 13849-12008

12 8 Hardware fault tolerance HFTA hardware fault tolerance of N means that N + 1 is the mini-mum number of faults that could cause a loss of the safety functionsee IEC 61508-22010

12 9 Mean dangerous failure rate λD Mean rate of dangerous failures during operation time (T10d) Unit 1hsee EN ISO 13849-12008

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 54

12 10 Safe failure fraction SFFFraction of safe failures related to all failures which are as-sumed to appearsee EN 13611A22011

12 11 Probability of dangerous failure PFHD Value describing the likelihood of dangerous failure per hour of a component for high demand mode or continuous mode Unit 1hsee EN 13611A22011

12 12 Mean time to dangerous failure MTTFd Expectation of the mean time to dangerous failuresee EN ISO 13849-12008

12 13 Demand rate nop Mean number of annual operationssee EN ISO 13849-12008

12 14 Average probability of dangerous failure on demand PFDavg (LDM = 1 ndash 10 switching cyclesyear)Average probability of a dangerous failure of the safety function on demand (LDM = low demand mode)see EN 61508-6

Glossary

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415

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Remarks

(Adobe Reader 7 or higher required) wwwadobecom

Elster GmbH Postfach 2809 middot 49018 Osnabruumlck Strotheweg 1 middot 49504 Lotte (Buumlren) GermanyT +49 541 1214-0 F +49 541 1214-370 infokromschroedercomwwwkromschroedercom

The current addresses of our international agents are available on the Internetwwwkromschroederdeindexphpid=718ampL=1

We reserve the right to make technical modifications in the interests of progressCopyright copy 2015 Elster GmbH All rights reserved

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0530

  • Pressure regulators with solenoid valve VAD VAG VAV VAH
  • Flow rate regulator VRH
  • Pressure regulators with double solenoid valve VCD VCG VCV VCH
  • Contents
  • 1 Application
    • 11 Examples of application
      • 111 Constant pressure control
      • 112 Constant pressure control with two gas solenoid valves
      • 113 Constant pressure control with max pressure switch
      • 114 Constant pressure control with non-controlled pilot gas outlet
      • 115 Modulating control
      • 116 Modulating control with two gas solenoid valves
      • 117 Modulating control with two gas solenoid valves and inlet pressure switch
      • 118 HighLow control
      • 119 Zero pressure control
      • 1110 Staged flow rate control
      • 1111 Continuous or staged flow rate control
      • 1112 Modulating control with variable airgas ratio control with gas solenoid valve
      • 1113 Modulating control in residential heat generation
          • 2 Certification
          • 3 Function
            • 31 VAD VAG VAH VRH VAV
              • 311 Pressure regulator for gas VAD
              • 312 Airgas ratio control VAG
              • 313 Flow rate regulators VAH VRH
              • 314 Variable airgas ratio control VAV
              • 315 Pressure regulator with gas solenoid valve VAxS position indicator with visual indicator
                • 32 Animation
                • 33 Connection diagram
                  • 331 VAx with M20 cable gland
                  • 332 VAx with plug
                  • 333 VAS with VADVAGVAHVAV with M20 cable gland
                  • 334 VAS with VADVAGVAHVAV with plug
                      • 4 Replacement possibilities for MODULINE pressure regulators with gas solenoid valve
                        • 41 GVS GVI GVIB GVR and GVRH are to be replaced by VAD VAG VAG+VAS VAH and VAV
                          • 5 Flow rate
                            • 51 Selection example for VAD
                              • 511 Calculate VAD
                                • 52 Selection example for VAG VAH VRH VAV
                                  • 521 CalculateVAG VxHVAV
                                    • 53 Selection example for zero governor VAGN
                                      • 531 Calculate VAGN
                                          • 6 Selection
                                            • 61 Selection table for pressure regulator with solenoid valve VAD
                                            • 62 Type code for VAD
                                            • 63 Selection table for airgas ratio control with solenoid valve VAG flow rate regulators VAH VRH
                                            • 64 Type code for VAG VAH VRH
                                            • 65 Selection table for variable airgas ratio control with solenoid valve VAV
                                            • 66 Type code for VAV
                                            • 67 Accessories
                                              • 7 Project planning information
                                                • 71 Installation
                                                  • 711 Installation position
                                                    • 72 Setting the low-fire rate on VAG VAH VRH VAV
                                                    • 73 Setting the high-fire rate on VAV
                                                      • 731 Calculation
                                                          • 8 Accessories
                                                            • 81 Gas pressure switch DGVC for VAx VRH
                                                            • 82 Gas pressure switch DGVCT for VAxT VRHT
                                                            • 83 Bypass valvepilot gas valve VAS 1
                                                              • 831 VAS 1 attached to VADVAGVAHVAV 1
                                                              • 832 VAS 1 attached to VADVAGVAHVAV 2 VADVAGVAHVAV 3
                                                              • 833 Flow rate
                                                                • 84 Bypass valvepilot gas valve VBY 8 for VADVAGVAHVAV 1
                                                                  • 841 Scope of delivery VBY 8I as bypass valve
                                                                  • 842 Scope of delivery VBY 8R as pilot gas valve
                                                                  • 843 Selection
                                                                  • 844 Type code
                                                                  • 845 Flow rate
                                                                  • 846 Technical data
                                                                    • 85 Tightness control TC 116V
                                                                    • 86 Pressure test points
                                                                    • 87 Cable gland set
                                                                    • 88 Seal set VA 1thinspndashthinsp3
                                                                    • 89 Differential pressure orifice
                                                                    • 810 Retaining frame
                                                                    • 811 Attachment block
                                                                    • 812 Gas control line
                                                                    • 813 Measuring orifice VMO
                                                                    • 814 Filter module VMF
                                                                    • 815 Fine-adjusting valve VMV
                                                                      • 9 Technical data
                                                                        • 91 VAD
                                                                        • 92 VAG
                                                                        • 93 VAH VRH
                                                                        • 94 VAV
                                                                        • 95 Safety-specific characteristic values for VAx 1thinspndashthinsp3
                                                                          • 951 Determining the PFHD value the λD value and the MTTFd value
                                                                          • 952 Calculating the PFHD and PFDavg
                                                                            • 96 Dimensions
                                                                              • 10 Converting units
                                                                              • 11 Maintenance cycles
                                                                              • 12 Glossary
                                                                                • 121 Diagnostic coverage DC
                                                                                • 122 Mode of operation
                                                                                • 123 Category
                                                                                • 124 Common cause failure CCF
                                                                                • 125 Fraction of undetected common cause failures β
                                                                                • 126 B10d value
                                                                                • 127 T10d value
                                                                                • 128 Hardware fault tolerance HFT
                                                                                • 129 Mean dangerous failure rate λD
                                                                                • 1210 Safe failure fraction SFF
                                                                                • 1211 Probability of dangerous failure PFHD
                                                                                • 1212 Mean time to dangerous failure MTTFd
                                                                                • 1213 Demand rate nop
                                                                                • 1214 Average probability of dangerous failure on demand PFDavg
                                                                                  • Feedback
                                                                                  • Contact
                                                                                      1. naechste_Seite 24
                                                                                      2. naechste Seite 18
                                                                                      3. naechste Seite 6
                                                                                      4. naechste Seite 16
                                                                                      5. naechste Seite 14
                                                                                      6. naechste Seite 25
                                                                                      7. naechste_Seite 11
                                                                                      8. naechste_Seite 17
                                                                                      9. fbArbeitspunkt_Min Ja
                                                                                      10. fbArbeitspunkt Ja
                                                                                      11. ftProgramm Standard-Programm
                                                                                      12. fz_kv
                                                                                      13. fz_pe 80
                                                                                      14. fz_pG 60
                                                                                      15. fzDelta_p_Soll 20
                                                                                      16. ftEinheit_Druck mbar
                                                                                      17. fatTyp [115]
                                                                                      18. fbArbeitspunkt_Min_2 Ja
                                                                                      19. fbArbeitspunkt_2 Ja
                                                                                      20. ftRegler_Typ VAG
                                                                                      21. ftProgramm_2 Standard-Programm
                                                                                      22. fz_kv_2
                                                                                      23. fatMedium [08]
                                                                                      24. fzDichte 08
                                                                                      25. ftEinheit_Dichte kgm3
                                                                                      26. fzV_Norm 30
                                                                                      27. ftEinheit_Volstrom m3h
                                                                                      28. fz_pe_2 80
                                                                                      29. fz_pG_2 60
                                                                                      30. fzDelta_p_Soll_2 20
                                                                                      31. ftEinheit_Druck2 [mbar]
                                                                                      32. ftEinheit_Geschw [ms]
                                                                                      33. fatTyp_2 [10954451150103322]
                                                                                      34. fbArbeitspunkt_Min_3 Ja
                                                                                      35. fbArbeitspunkt_3 Ja
                                                                                      36. ftProgramm_3 Standard-Programm
                                                                                      37. fz_kv_3
                                                                                      38. fz_pe_3 20
                                                                                      39. fz_pG_3 0
                                                                                      40. fzDelta_p_Soll_3 20
                                                                                      41. fatTyp_3 [123]
                                                                                      42. fatSchaltleistung [6363683]
                                                                                      43. fz_nop_Stunde 1
                                                                                      44. fz_nop_Jahr 8760
                                                                                      45. fzZyklus 3600
                                                                                      46. fzB10d 6363683
                                                                                      47. fzT10d 10
                                                                                      48. fzPFHd_1V 15714170551864384e-8
                                                                                      49. fzPFDavg_1V
                                                                                      50. ftGeeignet_1V PL d SIL 2
                                                                                      51. fzPFHd_2V 33505832253532625e-10
                                                                                      52. fzPFDavg_2V
                                                                                      53. ftGeeignet_2V PL e SIL 3
                                                                                      54. ftUebersicht Off
                                                                                      55. ftVerstaendlichkeit Off
                                                                                      56. ftFehlende_Info
                                                                                      57. ftUmfang Off
                                                                                      58. ftVerwendung_1 Off
                                                                                      59. ftVerwendung_2 Off
                                                                                      60. ftVerwendung_3 Off
                                                                                      61. ftVerwendung_4 Off
                                                                                      62. ftNavigation Off
                                                                                      63. ftTaetigkeitsbereich Off
                                                                                      64. ftBemerkung
                                                                                      65. Michael Rehkamp Elster Kromschroumlder>btnSenden
Page 20: VAD, VAG, VAV, VAH, VRH, VCD, VCG, VCV, VCH · PDF fileVAD, VAG, VAH, VAV, VRH, VCD, VCG, VCV, VCH · Edition 04.15 6 VAD VAD VAS 1 .1 Examples of application 1 .1 .1 Constant pressure

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 20

3 2 AnimationThe interactive animation shows the function of the valVario controls VADVAGVAHVAVClick on the picture The animation can be controlled using the control bar at the bottom of the window (as on a DVD player) To play the animation you will need Adobe Reader 7 or a newer version If you do not have Adobe Reader on your system you can download it from the Internet

Go to wwwadobecom click on ldquoAdobe Readerrdquo at the bottom of the page and follow the instructionsIf the animation does not start to play you can download it from the document library (wwwdocuthekcom) as an inde-pendent application

Function

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 21

3 3 Connection diagramWiring to EN 60204-1Connection diagram for VAxS with position indicator ndash see page 19 (Pressure regulator with gas solenoid valve VAxS position indicator with visual indicator)

3 3 1 VAx with M20 cable gland

L1 (+)

N (ndash)

3 3 2 VAx with plug

1 = N (-)

2 = L1 (+)

3 3 3 VAS with VADVAGVAHVAV with M20 cable glandL1V1 (+)

N (-)

L1V2 (+)

3 3 4 VAS with VADVAGVAHVAV with plug2 = L1V1 (+)

1 = N (-)

3 = L1V2 (+)

Function

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 22

4 Replacement possibilities for MODULINE pressure regulators with gas solenoid valve4 1 GVS GVI GVIB GVR and GVRH are to be replaced by VAD VAG VAG+VAS VAH and VAV

Type TypeGVS Pressure regulator with gas solenoid valve Pressure regulator with gas solenoid valve VADGVI Airgas ratio control with gas solenoid valve Airgas ratio control with gas solenoid valve VAG

GVIB Airgas ratio control with gas solenoid valve and bypass valve

Airgas ratio control with gas solenoid valve and bypass valve VAG+VAS

GVRH Flow rate regulator with gas solenoid valve Flow rate regulator with gas solenoid valve VAHGVR Variable airgas ratio control with gas solenoid valve Variable airgas ratio control with solenoid valve VAV115125 Flange 38 Size 115

Size 125 on request

115125 Flange frac12 Size 115

Size 125 Size 1 DN 15 115

115125 Flange frac34 Size 115

Size 125 Size 1 DN 20 120

115125 Flange 1 Size 115

Size 125 Size 1 DN 25 125

232240 Flange 1 Size 232

Size 240 on request

232240 Flange 1frac12 Size 232

Size 240 Size 2 DN 40 240

350 Flange 1frac12 Size 350 on request350 Flange 2 Size 350 Size 3 DN 50 350ML MODULINE + Rp internal thread connection fl anges Rp internal thread RTML MODULINE + NPT internal thread connection fl anges NPT internal thread N01 pu max 100 mbar (15 psig) pu max 500 mbar (7 psig) 02 200 mbar (3 psig) 500 mbar (7 psig)

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 23

Replacement possibilities for MODULINE pressure regulators with gas solenoid valve gt GVS GVI GVIB GVR and GVRH are to be replaced by VAD VAG VAG+VAS VAH and VAV

ContinuationType Type

Quick opening Quick opening NF1 Control ratio 11 Control ratio 11 K Mains voltage 24 V DC Mains voltage 24 V DC K

ndash 100 V AC PQ 120 V AC 120 V AC Q

ndash 200 V AC YT 220240 V AC 230 V AC W3 Electrical connection via terminals Electrical connection via terminals 6 Electrical connection via socket Electrical connection via socket 9 Metal terminal connection box Electrical connection via terminals S Position indicator Position indicator with visual indicator SG Position indicator for 24 V Position indicator for 24 V with visual indicator GM Suitable for biologically produced methane Suitable for biologically produced methane

Pressure test point at the inlet Pressure test point at the inlet and outlet Outlet pressure pd -25

Outlet pressure pd 25 ndash 25 mbar (1 ndash 10 WC)

2 ndash 90 mbar (08 ndash 36 WC) 20 ndash 50 mbar (8 ndash 20 WC) -5035 ndash 100 mbar (14 ndash 40 WC) -100Standard seat A

ExampleGVS 350ML01T3with Rp 2 connection flanges

ExampleVAD 350RNW-100A

with test points

= standard = available Pressure test points may be attached at the left- andor right-hand side Position indicator with visual indicator can be attached at the left- or right-hand side

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 24

∆p [i

nch

WC]

Qn [SCFH]100 400 600 4000 60001000 200020 30 40 50 200 3006015 80

1

08

1

2

3

4

56

8

10

20

30

40

5060

80

100

200

∆p [m

bar]

5

8

3

20

10

30

40

80

60

300

400

50

04 06 1 2 3 4 5 808 10 20 30 402

03 60 100 200

100

200

500

1

3

2

04 06 08 1 2 3 4 5 6 8 10 20 30 40

04 06 08 1 2 3 4 5 6 8 10

200

80 10020 3003

03Qn [m3h]

02

50 60 80 100

40 50 60

VAD

115

B

VAD

120

AVA

D 12

5A

P1P2

VAD

240

AVA

D 35

0A

= natural gas (ρ = 080 kgm3) = propane (ρ = 201 kgm3) = air (ρ = 129 kgm3)

The characteristic flow rate curves have been meas-ured with the specified flanges and a fitted strainer If two or more valves are combined the pressure loss of each additional valve drops by approx 5

metric imperial

Enter densityFlow rate Qn

Inlet pressure pu

Outlet pressure pd

Product RV v

Pressure loss ∆p

∆pmin

5 Flow rate5 1 Selection example for VADNatural gas Flow rate Qmax = 30 m3h Inlet pressure pu = 80 mbar Outlet pressure pd = 60 mbarThe desired control ratio from high-fire to low-fire rate is RV = 101High fire ∆p = pu - pd = 20 mbar Point P1Low fire Point P2 Qmin = 26 m3h at ∆p = 20 mbar RV = Qmax Qmin = 1151

Point P1 and point P2 must be within the working range of a unit size We recommend that you select the smallest size to achieve the best control properties

5 1 1 Calculate VAD

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 25

∆p [i

nch

WC]

Qn [SCFH]100 400 600 4000 60001000 200020 30 40 50 200 3006015 80

1

08

1

2

3

4

56

8

10

20

30

40

5060

80

100

200

∆p [m

bar]

5

8

3

20

10

30

40

80

60

300

400

50

04 06 1 2 3 4 5 808 10 20 30 402

03 60 100 200

100

200

500

1

3

2

04 06 08 1 2 3 4 5 6 8 10 20 30 40

04 06 08 1 2 3 4 5 6 8 10

200

80 10020 3003

03Qn [m3h]

02

50 60 80 100

40 50 60

= pd min lt 5 mbar

VAG

VxH

VAV

115

BVA

GV

xHV

AV 12

0A

VAG

VxH

VAV

125

A

P1

P2

VAG

VxH

VAV

240

AVA

GV

xHV

AV 3

50A

= natural gas (ρ = 080 kgm3) = propane (ρ = 201 kgm3) = air (ρ = 129 kgm3)

The characteristic flow rate curves have been meas-ured with the specified flanges and a fitted strainer If two or more valves are combined the pressure loss of each additional valve drops by approx 5

5 2 Selection example for VAG VAH VRH VAV Natural gas Flow rate Qmax = 30 m3h Inlet pressure pu = 80 mbar Outlet pressure pd max VAG = 60 mbarThe desired control ratio from high-fire to low-fire rate is RV = 101High fire ∆p = pu - pd max = 20 mbar Point P1Low fire pd min = pd max RV2 = 06 mbar Qmin = Qmax RV = 3 m3h ∆p = pu - pd min = 794 mbar Point P2 select VAG 120APoint P1 and point P2 must be within the working range of a unit size We recommend that you select the smallest size to achieve the best control properties

metric imperial

Enter densityFlow rate Qn

Inlet pressure pu

Outlet pressure pd

Product RV v

5 2 1 Calculate VAG VxH VAV

Pressure loss ∆p

∆pmin

Flow rate

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 26

∆p [i

nch

WC]

Qn [SCFH]100 400 600 4000 60001000 200020 30 40 50 200 3006015 80

1

08

1

2

3

4

56

8

10

20

30

40

5060

80

100

200

∆p [m

bar]

5

8

3

20

10

30

40

80

60

300

400

50

04 06 2 3 4 5 808 10 20 30 402

03 60 100 200

100

200

500

1

3

2

04 06 08 1 2 3 4 5 6 8 10 20 30 40

04 06 08 1 2 3 4 5 6 8 10

200

80 10020 3003

03Qn [m3h]

02

50 60 80 100

40 50 60

VAG

115

N

P1VAG

125

N

VAG

120

N

VAG

240

NP2

VAG

350

N

= natural gas (ρ = 080 kgm3) = propane (ρ = 201 kgm3) = air (ρ = 129 kgm3)

The characteristic flow rate curves have been meas-ured with the specified flanges and a fitted strainer If two or more valves are combined the pressure loss of each additional valve drops by approx 5

5 3 Selection example for zero governor VAG NNatural gas Flow rate Qmax = 30 m3h Inlet pressure pu = 20 mbar Outlet pressure pd = 0 mbar (atmospheric pressure)The desired control ratio from high-fire to low-fire rate is RV = 101High fire ∆p = pu - pd max = 20 mbar Point P1Low fire Point P2 Qmin = 24 m3h at ∆p = 20 mbar RV = Qmax Qmin = 1231Point P1 and point P2 must be within the working range of a unit size We recommend that you select the smallest size to achieve the best control properties

metric imperial

Enter densityFlow rate Qn

Inlet pressure pu

Outlet pressure pd

Product RV

5 3 1 Calculate VAG N

Pressure loss ∆p

∆pmin

Flow rate

v

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 27

6 Selection6 1 Selection table for pressure regulator with solenoid valve VAD

Accessories right Accessories left

Type1) T R N F N K P Q Y W S2) G2) R2) L2) M20

cab

le g

land

Plug

with

soc

ket

Plug

with

out s

ocke

t

-25-50 -100 A B Scre

w p

lug

Pres

sure

test

poi

nt

DG

17V

C 3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

Scre

w p

lug

Pres

sure

test

poi

nt

DG

17V

C 3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

VAD 115

VAD 120

VAD 125

VAD 240

VAD 350

= standard = available1) The following nominal inlet fl ange diameters are also available size 1 with nominal diameter DN 10 size 2 with nominal diameters DN 25 DN 32 and DN 50 size 3 with nominal diameters DN 40 and DN 652) Position indicator and bypasspilot gas valve cannot be fi tted together on the same side3) Specify the test point for inlet pressure pu or outlet pressure pdHelp for selecting the pressure regulator VAD can be found on the ProFi DVD wwwkromschroedercom Products DVD Product fi nder ldquoProFirdquo

Order exampleVAD 240RNW-100A

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 28

Selection

6 2 Type code for VADCode DescriptionVAD Pressure regulator with solenoid valve1 ndash 3 SizeT T-product10 ndash 65 Nominal inlet and outlet diameterRNF

Rp internal threadNPT internal thread

ISO fl angeN Quick opening quick closingKPQYW

Mains voltage 24 V DCMains voltage 100 V AC 5060 HzMains voltage 120 V AC 5060 HzMains voltage 200 V AC 5060 HzMains voltage 230 V AC 5060 Hz

SG

Position indicator with visual indicatorPosition indicator for 24 V with visual indicator

RL

Viewed from the right (in the direction of fl ow)Viewed from the left (in the direction of fl ow)

-25-50-100

Outlet pressure pd 25 ndash 25 mbar20 ndash 50 mbar

35 ndash 100 mbarAB

Standard valve seatReduced valve seat

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 29

Selection

6 3 Selection table for airgas ratio control with solenoid valve VAG flow rate regulators VAH VRH

Type1) T R N F N K P Q Y W S2) G2) R2) L2) M20

cab

le g

land

Plug

with

soc

ket

Plug

with

out s

ocke

t

A B E K A N Scre

w p

lug

Pres

sure

test

poi

ntD

G 1

7VC

3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

Scre

w p

lug

Pres

sure

test

poi

ntD

G 1

7VC

3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

VAG 115 VAG 120 VAG 125 VAG 240 VAG 350

VAH 115 VAH 120 VAH 125 VAH 240 VAH 350

VRH 115 VRH 120 VRH 125 VRH 240 VRH 350

= standard = available1) The following nominal inlet fl ange diameters are also available size 1 with nominal diameter DN 10 size 2 with nominal di-

ameters DN 25 DN 32 and DN 50 size 3 with nominal diameters DN 40 and DN 652) Position indicator and bypasspilot gas valve cannot be fi tted together on the same side3) Specify the test point for inlet pressure pu or outlet pressure pdHelp for selecting the regulators can be found on the ProFi DVD wwwkromschroedercom Products DVD Product fi nder ldquoProFirdquo

Order exampleVAG 240RNWAE

Accessories right Accessories left

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 30

Selection

6 4 Type code for VAG VAH VRHCode DescriptionVAGVAHVRH

Airgas ratio control with solenoid valveFlow rate regulator with solenoid valve

Flow rate regulator1 ndash 3 SizeT T-product15 ndash 50 Nominal inlet and outlet diameterRNF

Rp internal threadNPT internal thread

ISO fl angeN1) Quick opening quick closingK1)

P1)

Q1)

Y1)

W1)

Mains voltage 24 V DCMains voltage 100 V AC 5060 HzMains voltage 120 V AC 5060 HzMains voltage 200 V AC 5060 HzMains voltage 230 V AC 5060 Hz

S1)

G1)Position indicator with visual indicator

Position indicator for 24 V with visual indicatorRL

Viewed from the right (in the direction of fl ow)Viewed from the left (in the direction of fl ow)

AB

Standard valve seatReduced valve seat

EKAN

Connection kit for air control pressure psaVAG VAH VRH compression fi tting

VAG plastic hose couplingVAG VAH VRH NPT 18 adapter

VAG zero governor1) Only available for VAG VAV VAH

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 31

6 5 Selection table for variable airgas ratio control with solenoid valve VAVAccessories right Accessories left

Type1) T R N F N K P Q Y W S2) G2) R2) L2) M20

cab

le g

land

Plug

with

soc

ket

Plug

with

out s

ocke

t

A B E K A Scre

w p

lug

Pres

sure

test

poi

ntD

G 1

7VC

3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

Scre

w p

lug

Pres

sure

test

poi

ntD

G 1

7VC

3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

VAV 115

VAV 120

VAV 125

VAV 240

VAV 350

= standard = available1) The following nominal inlet fl ange diameters are also available size 1 with nominal diameter DN 10 size 2 with nominal diameters DN 25 DN 32 and DN 50 size 3 with nominal diameters DN 40 and DN 652) Position indicator and bypasspilot gas valve cannot be fi tted together on the same side3) Specify the test point for inlet pressure pu or outlet pressure pdHelp for selecting the variable airgas ratio control VAV can be found on the ProFi DVD wwwkromschroedercom

Products DVD Product fi nder ldquoProFirdquo

Order exampleVAV 240RNWAK

Selection

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 32

Selection

6 6 Type code for VAVCode DescriptionVAV Variable airgas ratio control with solenoid valve1 ndash 3 SizeT T-product15 ndash 50 Nominal inlet and outlet diameterRNF

Rp internal threadNPT internal thread

ISO fl angeN Quick opening quick closingKPQYW

Mains voltage 24 V DCMains voltage 100 V AC 5060 HzMains voltage 120 V AC 5060 HzMains voltage 200 V AC 5060 HzMains voltage 230 V AC 5060 Hz

SG

Position indicator with visual indicatorPosition indicator for 24 V with visual indicator

RL

Viewed from the right (in the direction of fl ow)Viewed from the left (in the direction of fl ow)

AB

Standard valve seatReduced valve seat

EKA

Connection kit for air control pressure psa and combus-tion chamber control pressure psc

compression fi ttingplastic hose coupling

NPT 18 adapter

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 33

Selection

6 7 AccessoriesModularly configurable withndash Screw plugsndash Pressure test pointsndash Pressure switch DGVC for inlet

andor outlet pressurendash Tightness control TCndash Bypasspilot gas valve VBY 8 for

size 1ndash Bypasspilot gas valve VAS 1For further information see page 37 (Accessories)

Position indicator

Plug with socket

Plug

Screwplugs

Pressuretest points

Pressure switch DGC Tightness

control TC

Bypasspilot gas valve VBY 8 for size 1

Bypasspilot gas valve VAS 1

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 34

7 Project planning informationDo not store or install the unit in the open airThe inlet pressure pu and the outlet pressure pd can be meas-ured on both sides of the valve body To increase the control accuracy an external impulse line can be connected instead of the pressure test point pd

VAD

pu

pd

(psa)

VAGpd

pu

psa

psa

VAD measurement point for the gas outlet pressure pd on the regulator body A combustion chamber control line (psc) can be connected to connection psa for maintaining a constant burner capacityVAG additional measurement point for the air control pressure psa on the regulator body

VAV

psapsc

pu

pd

VAH VRH

pu

pd-

pdpsa-

psa

VAV measurement point for the outlet pressure pd on the regulator bodyVAH additional measurement points for the outlet pressure pd- and the air control pressure psapsa- on the regulator body

7 1 Installation

GFK

VAGVAH

GFKVAD

Sealing material and thread cuttings must not be allowed to get into the valve housing Install a filter upstream of every system

gt20 mmgt0 79

The unit must not be in contact with masonry Minimum clear-ance 20 mm (079 inches)Ensure that there is sufficient space for installation and ad-justment

le +100 degCle +212 degF

The solenoid body heats up during operation ndash depending on ambient temperature (max 60degC140degF) and intrinsic heating (approx 40degC104degF)

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 35

In the case of double solenoid valves the position of the con-nection box can only be changed by removing the actuator and reinstalling it offset by 90deg or 180deg

If more than three valVario controls are installed in line the controls must be supported

The seals in some gas compression fittings are approved for temperatures of up to 70degC (158degF) This temperature limit will not be exceeded if the flow through the pipe is at least 1 msup3h (3531 SCFH) of gas and the maximum ambient temperature is 50degC (122degF)

7 1 1 Installation position

pu ge 80 mbar(80 hPa32 WC)

VAD VAG VAH VRH VAV

In humid environments black solenoid actuator in the vertical upright position only

VAD VAG VAH VRH black solenoid actuator in the vertical upright position or tilted up to the horizontal not upside downVAG VAH horizontal position only if pu ge 80 mbar (32 WC))VAV installation in the vertical position only black solenoid actuator in the vertical upright positionTo ensure that the airgas ratio control VAG the flow rate regulator VAH VRH or the variable airgas ratio control VAV can react quickly when the load is changed the impulse line for the air control pressure psa and for VAV the impulse line for the combustion chamber control pressure psc should be kept as short as possible The tube internal diameter for the impulse line must always be ge 39 mm (015)

VAH VRHIt is not permitted to install a gas solenoid valve VAS down-stream of flow rate regulator VAH VRH and upstream of fine-adjusting valve VMV The VAS would no longer be able to perform its function as a second safety valve if installed in the above-mentioned position

M

VMV

VAH

VASVAS

pd-

psa-psa

VMV

VAH pd-

psa-psa

The measuring orifice in the air line for impulse lines psa and psa- must always be installed downstream of the air control valve

Project planning information gt Installation

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 36

VAVThe impulse line for the combustion chamber control pres-sure psc must be fitted so that no condensation can enter the pressure regulator but rather flows back into the combustion chamber

7 2 Setting the low-fire rate on VAG VAH VRH VAV

-10 +05-05

ndash

+1

-15

mbar

+15

06

1 152

3

N V

+ +ndash

+30 -15+15

ndash

-3

+5

mbar

-5

N

+

VAG VAH VRH VAV

If the burner operates at low-fire rate the gasair mixture can be changed using the parallel shift of the characteristic curve by turning the adjusting screw ldquoNrdquoAdjusting range at low fire VAG VAH VRH -5 to +5 mbar (-195 to +195 WC) VAV -15 to +15 mbar (-06 to +06 WC)

7 3 Setting the high-fire rate on VAVTo set the high-fire rate the transmission ratio is changed us-ing the adjusting screw ldquoVrdquo until the required flue gas values are achievedTransmission ratio V = pdpsa = 061 to 31The settings N and V can influence each other and must be repeated if necessary

+N+V

-V

-N

VAV

psa [mbar]

p d [m

bar]

7 3 1 CalculationWith no connection to the combustion chamber control pres-sure psc pd = V times psa + NWith connection to the combustion chamber control pressure psc (pd - psc) = V times (psa - psc) + N

Project planning information

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 37

pu pd

21579

4836

085310

189

142

8 Accessories8 1 Gas pressure switch DG VC for VAx VRHType Adjusting range [mbar]DG 17VC 2 to 17DG 40VC 5 to 40DG 110VC 30 to 110DG 300VC 100 to 300

Scope of delivery 1 times pressure switch for gas 2 times retaining screws 2 times sealing rings

8 2 Gas pressure switch DG VCT for VAx T VRH TType Adjusting range [WC]DG 17VCT 08 to 68DG 40VCT 2 to 16DG 110VCT 12 to 44DG 300VCT 40 to 120

Scope of delivery 1 times gas pressure switch with AWG 18 connection wires 2 times retaining screws 2 times sealing ringsMonitoring the inlet pressure pu the electrical plug of the pressure switch for gas points towards the inlet flangeMonitoring the outlet pressure pd the electrical plug of the pressure switch for gas points towards the outlet flange

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 38

A BC

D

FE

ACD

F

B

E

8 3 Bypass valvepilot gas valve VAS 18 3 1 VAS 1 attached to VADVAGVAHVAV 1Scope of delivery A 1 times bypasspilot gas valve VAS 1 B 4 times O-rings C 4 times double nuts D 4 times connection parts E 1 times mounting aidBypass valve VAS 1 F 2 times connection pipes if the bypass valve has a blind flange

at the outlet sidePilot gas valve VAS 1 F 1 times connection pipe 1 times sealing plug if the pilot gas valve

has a threaded flange at the outlet side

Accessories

8 3 2 VAS 1 attached to VADVAGVAHVAV 2 VADVAGVAHVAV 3Scope of delivery A 1 times bypasspilot gas valve VAS 1 B 4 times O-rings C 4 times spacer sleeves D 4 times connection parts E 1 times mounting aidBypass valve VAS 1 F 2 times connection pipes if the bypass valve has a blind flange

at the outlet sidePilot gas valve VAS 1 F 1 times connection pipe 1 times sealing plug if the pilot gas valve

has a threaded flange at the outlet side

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 39

2

3

456

810

20

30

405060

80100

∆p [m

bar]

005 01 02 03 05 08 1 2 3 4 51

3

2

Qn [m3h]

1

01

02

03

0405

08

003

002

6 8 10

005 01 02 03 05 08 1 2 3 4 5003 6 8 10

20

005 01 02 03 05 08 1 2 3 4 5003 6 8 10 20

30

∆p [i

nch

WC]

1

2

3

456

810

20

30

40

04

004

006

00801

02

03

0506

08

Qn [SCFH]10 40 60 100 200 3001 500 10002 3 4 5

120 306 8

21 3 4 5 6 7 8 910

8 3 3 Flow rate

The characteristic flow rate curves have been measured for bypass valve VAS 1 with connection pipe diameter 1 to 10 mm (004 to 04) and for the pilot gas valve with 10 mm (04) connection pipe

Bypass valve connection pipe diameter [mm]

Pilo

t gas

val

ve 1

0 m

m (0

4)

conn

ectio

n pi

pe d

iam

eter

Accessories gt Bypass valvepilot gas valve VAS 1

= natural gas (ρ = 080 kgm3) = propane (ρ = 201 kgm3) = air (ρ = 129 kgm3)

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 40

Accessories

8 4 Bypass valvepilot gas valve VBY 8 for VADVAGVAHVAV 1

B

C

AVBY 8

VAx 1

55

(217)40(157)

70 (276)

80(315)

Rp frac14(pilot gas valve)

For mounting on VAD VAG VAH VAV 1 and double solenoid valve VCD VCG VCH VCV 1

8 4 1 Scope of delivery VBY 8I as bypass valveA 1 times bypass valve VBY 8IB 2 times retaining screws with 4 times O-rings both retaining screws

have a bypass orificeC 1 times grease for o-rings

8 4 2 Scope of delivery VBY 8R as pilot gas valveA 1 times pilot gas valve VBY 8RB 2 times retaining screws with 5 x O-rings one retaining screw

has a bypass orifice (2 x O-rings) the other does not (3 x O-rings)

C 1 times grease for O-rings

8 4 3 SelectionType I R W Q K 6L -R -L E B D 05

VBY 8

Order exampleVBY 8RW6L-LED

8 4 4 Type codeCode DescriptionVBY Gas solenoid valve8 Nominal sizeIR

For internal gas pick-up as bypass valveFor external gas pick-up as pilot gas valve

KQW

Mains voltage 24 V DC Mains voltage 120 V AC 5060 HzMains voltage 230 V AC 5060 Hz

6L Electrical connection via plug and socket with LED-R-L

Attachment side of main valve right-hand sideAttachment side of main valve left-hand side

EB

Attached to the VAxEnclosed (separate packing unit)

05D

Nozzle diameter = 05 mm (002)Flow adjustment

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 41

2

01

02

03

05

081

3

456

810

20

30

405060

80100

∆p [m

bar]

1

3

201 02 03 05 1 2 3001 003 4

Qn [m3h]

02 03 05 1 2

01 02 05

002 006

002

002 006 1

0010006 005 01

001

0003

0006 2 3

VBY 8DVBY 805

∆p [i

nch

WC]

1

2

3

456

810

20

30

40

040506

08

1

Qn [SCFH]10 40 60 1005 2081 2 30402

01

02

03

004005006

008

Adjusting range

8 4 5 Flow rateVBY 8 D

+

-

The flow rate can be set by turning the flow rate restrictor (4 mm016 Allen screw) frac14 of a turn Flow rate 10 to 100

VBY 8 05The flow is routed through a 05 mm (002) nozzle and thus has a fixed characteristic flow rate curve Adjustment is not possible

8 4 6 Technical dataInlet pressure pu max 500 mbar (7 psig)Ambient temperature 0 to +60degC (32 to 140degF) no condensation permittedStorage temperature 0 to +40degC (32 to 104degF) no condensation permittedPower consumption 24 V = 8 W 120 V = 8 W 230 V = 95 WEnclosure IP 54

Accessories gt Bypass valvepilot gas valve VBY 8 for VADVAGVAHVAV 1

= natural gas (ρ = 080 kgm3) = propane (ρ = 201 kgm3) = air (ρ = 129 kgm3)

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 42

TC 116VB C

56(22)

49(193)

27(106)

A

A

VCx 1 VCx 2VCx 3

8 5 Tightness control TC 116Vfor VAx 1 ndash 3An adapter plate is required to attach the tightness control to the right- or left-hand side of the pressure regulator with gas solenoid valveScope of delivery A 1 times adapter plate B 2 times O-rings C 2 times retaining screwsFor attachment to left-hand side Order No 74922391 right-hand side Order No 74921995

8 6 Pressure test pointsTest points to check the inlet pressure pu and outlet pressure pdScope of delivery 1 x pressure test points with 1 x profiled sealing rings Order No 74923390

8 7 Cable gland setWhen wiring a double solenoid valve with pressure regula-tor VCx the connection boxes are to be connected using a cable gland setThe cable gland set can only be used if the connection boxes are at the same height and on the same side and if both valves are equipped either with or without a proof of closure switchVA 1 Order No 74921985 VA 2 Order No 74921986 VA 3 Order No 74921987

Accessories

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 43

A B

D

C

Accessories

8 9 Differential pressure orifice

Size PipeDN

Differential pressure orifi cewith outlet dia

1 15 17 mm 0671 20 25 mm 0981 25 30 mm 1182 40 46 mm 1813 50 58 mm 228

If pressure regulator VADVAGVAV 1 is retrofitted upstream of gas solenoid valve VAS 1 a DN 25 differential pressure orifice with outlet opening d = 30 mm (118) must be inserted at the outlet of the pressure regulatorIn the case of pressure regulator VAx 115 or VAx 120 the DN 25 differential pressure orifice must be ordered separately and retrofitted Order No 74922240

8 8 Seal set VA 1 ndash 3VA 1 Order No 74921988 VA 2 Order No 74921989 VA 3 Order No 74921990Scope of deliveryA 1 times double block seal B 2 times O-rings (flange) C 2 times O-rings (pressure switch) for pressure test pointscrew plug D 2 times sealing rings (flat sealing) and 2 times profiled sealing rings

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 44

BA

C

pd-

8 11 Attachment blockFor locked installation of pressure gauge and other acces-soriesScope of delivery A 1 times attachment block B 2 times self-tapping screws for installation C 2 times O-rings

Accessories

8 10 Retaining frameIn the event that a pressure regulator VAx is installed at a later point upstream of a gas solenoid valve VAS a measur-ing orifice VMO or a fine-adjusting valve VMV the retaining frame must be fitted at the inlet of the second device in order to fasten the differential pressure orifice at the regulator outlet Order the retaining frame separatelyRetaining frame for Size 1 Order No 74923029 Size 2 Order No 74923030 Size 3 Order No 74923031

8 12 Gas control lineFine-adjusting valve VMV can be installed on the flow rate regulator VAH for fine adjustment of the gas flow rateThe gas control line for gas outlet pressure pd- is available with 2 18 compression fittingsSize 1 Order No 74924458 Size 2 Order No 74924459

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 45

8 13 Measuring orifice VMOThe measuring orifice VMO is designed to reduce the gas and air flow rates and is installed downstream of the valVario control The measuring orifice is available with Rp internal thread (NPT internal thread) or flange to ISO 7005See wwwdocuthekcom Elster Kromschroumlder Krom-schroumlder LBE Products 03 Valves and butterfly valves valVario accessories Type of document Technical Informa-tion VMO

Accessories

8 14 Filter module VMFUsing the filter module VMF the gas flow upstream of the gas solenoid valve VAS and the airgas ratio control is cleaned The filter module is available with Rp internal thread (NPT internal thread) or flange to ISO 7005 and can also be supplied with fitted pressure switch as an optionSee wwwdocuthekcom Elster Kromschroumlder Krom-schroumlder LBE Products 03 Valves and butterfly valves valVario accessories Type of document Technical Informa-tion VMF

8 15 Fine-adjusting valve VMVThe flow rate is set using the fine-adjusting valve VMV The fine-adjusting valve is available with Rp internal thread (NPT internal thread) or flange to ISO 7005See wwwdocuthekcom Elster Kromschroumlder Krom-schroumlder LBE Products 03 Valves and butterfly valves valVario accessories Type of document Technical Infor-mation VMV

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 46

9 Technical dataGas types natural gas LPG (gaseous) biologically produced methane (max 01 -by-vol H2S) or clean air other gases on request The gas must be clean and dry in all temperature conditions and must not contain condensateCE and FM approved UL listed max inlet pressure pu 10 ndash 500 mbar (4 ndash 200 WC) FM approved (230 V AC 120 V AC 24 V DC) non opera-tional pressure 700 mbar (10 psig)ANSICSA approved (230 V AC 120 V AC 24 V DC) up to 350 mbar (5 psig)Opening time of the solenoid valve quick opening le 05 s Closing time quick closing lt 1 sMedium and ambient temperatures -20 to +60degC (-4 to +140degF) no condensation permittedStorage temperature -20 to +40degC (-4 to +104degF)Enclosure IP 65Valve housing aluminium valve seal NBRConnection flanges with internal thread Rp to ISO 7-1 NPT to ANSIASMESafety valve Class A to EN 161 Factory Mutual Research Class 7400 Process Control Valves (230 V AC 120 V AC 24 V DC) ANSI Z2121 and CSA 65 ANSI Z2118 and CSA 63Control class A to EN 88-1Control range up to 101

Mains voltage 230 V AC +10-15 5060 Hz 200 V AC +10-15 5060 Hz 120 V AC +10-15 5060 Hz 100 V AC +10-15 5060 Hz 24 V DC plusmn20Duty cycle 100Power factor of the solenoid coil cos φ = 09Power consumption

Type Voltage Power

VAx 1

24 V DC 25 W ndash100 V AC 25 W (26 VA)120 V AC 25 W (26 VA)200 V AC 25 W (26 VA)230 V AC 25 W (26 VA)

VAx 2 VAx 3

24 V DC 36 W ndash100 V AC 36 W (40 VA)120 V AC 40 W (44 VA)200 V AC 40 W (44 VA)230 V AC 40 W (44 VA)

VBY24 V DC 8 W ndash

120 V AC 8 W ndash230 V AC 95 W ndash

Cable gland M20 times 15Electrical connection cable with max 25 mm2 (AWG 12) or plug with socket to EN 175301-803

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 47

Position indicator contact rating

Type Voltage Min current(resistive load)

Max current(resistive load)

VAxS VCxS 12 ndash 250 V AC 5060 Hz 100 mA 3 AVAxG VCxG 12 ndash 30 V DC 2 mA 01 A

Position indicator switching frequency max 5 times per minute

Switching current [A]

Switching cyclescos φ = 1 cos φ = 06

01 500000 50000005 300000 250000

1 200000 1000003 100000 ndash

Limited to max 200000 cycles for heating systems

9 1 VADOutlet pressure pd VAD-25 25 ndash 25 mbar (1 ndash 10 WC) VAD-50 20 ndash 50 mbar (8 ndash 20 WC) VAD-100 35 ndash 100 mbar (14 ndash 40 WC)Combustion chamber control pressure psc (connection psa)

-20 to +20 mbar (-78 to +78 WC)

VAD

pu

pd

(psa)

9 2 VAGOutlet pressure pd 05 ndash 100 mbar (02 ndash 40 WC)Air control pressure psa 05 ndash 100 mbar (02 ndash 40 WC)

Adjusting range at low fire plusmn5 mbar (plusmn2 WC)Transmission ratio of gas to air 11The inlet pressure must always be higher than the air control pressure psa + pressure loss ∆p + 5 mbar (2 WC)

VAGpd

pu

psa

psa

VAGK 1 x 18 coupling for plastic hose (internal dia 39 mm (015) external dia 61 mm (024)) or VAGE 1 x 18 compression fitting for 6 times 1 tube or VAGA 1 x NPT 18 adapter or VAGN zero governor with breathing orifice

9 3 VAH VRHAir control pressure psa 06 ndash 100 mbar (024 ndash 40 WC) Differential air pressure ∆psa (psa - psa-) 06 ndash 50 mbar (024 ndash 197 WC) Differential gas pressure ∆pd (pd - pd-) 06 ndash 50 mbar (024 ndash 197 WC)Transmission ratio of gas to air 11The inlet pressure must always be higher than the differen-tial air pressure ∆psa + pressure loss ∆p + max gas pres-sure on burner + 5 mbar (2 WC)Adjusting range at low fire plusmn5 mbar (plusmn2 WC)

Technical data

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 48

VAHVRH

pd-

pu

psa-

psa

Connection of the air control pressure psaVAHE VRHE 3 x 18 compression fitting for 6 times 1 tube or VAHA VRHA 3 x NPT 18 adapter

9 4 VAVOutlet pressure pd 05 ndash 30 mbar (02 ndash 117 WC)Air control pressure psa 04 ndash 30 mbar (015 ndash 117 WC)Combustion chamber control pressure psc

-20 to +20 mbar (-78 to +78 WC)Min control pressure differential psa - psc 04 mbar (015 WC)Min pressure differential pd - psc 05 mbar (02 WC)Adjusting range at low fire plusmn15 mbar (plusmn06 WC)Transmission ratio of gas to air 061 to 31The inlet pressure pu must always be higher than the air control pressure psa times transmission ratio V + pressure loss ∆p + 15 mbar (06 WC)

pu

pd psapsc

VAV

VAVK 2 x plastic hose couplings (internal dia 39 mm (015) external dia 61 mm (024)) or VAVE 2 x 18 compression fitting for 6 times 1 tube or VAVA 2 x NPT 18 adapter

Technical data

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 49

9 5 Safety-specific characteristic values for VAx 1 ndash 3For SILSuitable for Safety Integrity Level SIL 1 2 3

Diagnostic coverage DC 0

Type of subsystem Type A to EN 61508-2 74312

Operating mode High demand mode pursu-ant to EN 61508-4 3512

For PLSuitable for Performance Level PL a b c d e

Category B 1 2 3 4Common cause failure CCF gt 65Application of essential safety requirements Satisfied

Application of tried-and-tested safety requirements Satisfied

For SIL and PL

B10d value

Operating cyclesVAD VAG VAV VAH 1 10094360VAD VAG VAV VAH 2 8229021VAD VAG VAV VAH 3 6363683

Hardware fault tolerance (1 valve) HFT 0

Hardware fault tolerance (2 valves) HFT 1

Safe failure fraction SFF gt 90Fraction of undetected com-mon cause failures β ge 2

Max service life under operating conditions10 years after date of production plus max 12 year in stor-age prior to first use or once the given number of operating cycles has been reached depending on which is achieved firstThe devices are suitable for single-channel systems (HFT = 0) up to SIL 2PL d and up to SIL 3PL e when two re-dundant valves are installed in a double-channel architecture (HFT = 1) provided that the complete system complies with the requirements of EN 61508ISO 13849

For a glossary of terms see page 53 (Glossary)

Technical data

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 50

nop 1hnop 1a

sB10d

T10d aPFHD (1 VAx) 1h

PFHD (2 VAx) 1h

PFDavg (1 VAx)

PFDavg (2 VAx)

Technical data gt Safety-specific characteristic values for VAx 1 ndash 3

9 5 1 Determining the PFHD value the λD value and the MTTFd value

PFHD = λD = x nop= 1MTTFd

01B10d

PFDavg = x λD x 24 x 365 x T10d 12

Type

Cycle time

suitable for

suitable for

PFHD = Probability of dangerous failure (HDM = high de-mand mode) [1hour]PFDavg = Average probability of dangerous failure on de-mand (LDM = low demand mode)λD = Mean dangerous failure rate [1hour]MTTFd = Mean time to dangerous failure [hours]nop = Demand rate (mean number of annual operations) [1hour]

9 5 2 Calculating the PFHD and PFDavg

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 51

VAD VAG VAH VAV

H1

Rp frac14(NPT frac14)

H2

E

LF

F

H4

H3

B

VAxS VAxF

L2G

G

Technical data

9 6 Dimensions

Type

Connec-tion Dimensions

WeightRpNPT DN

L L2 E F G H1 H2 H3 H4 Bmm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch kg lbs

VAx 115 12 15 75 29 ndash ndash 75 29 15 06 ndash ndash 143 56 82 32 161 63 117 46 97 38 18 40VAH 115 12 15 75 29 ndash ndash 75 29 15 06 ndash ndash 143 56 100 39 161 63 135 53 97 38 2 44VAx 120 34 20 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 82 33 161 63 117 46 97 38 19 42VAH 120 34 20 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 100 39 161 63 135 53 97 38 21 46VAx 125 1 25 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 82 33 161 63 117 46 97 38 19 42VAH 125 1 25 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 100 39 161 63 135 53 97 38 21 46VAx 240 112 40 128 50 200 79 85 33 29 11 66 26 170 67 112 44 191 75 162 64 125 49 44 97VAH 240 112 40 128 50 200 79 85 33 29 11 66 26 170 67 132 52 191 75 182 72 125 49 47 104VAx 350 2 50 155 61 230 91 85 33 36 14 74 29 180 70 135 53 201 79 196 77 160 63 61 134VAH 350 2 50 155 61 230 91 85 33 36 14 74 29 180 70 156 61 201 79 217 85 160 63 64 141

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 52

10 Converting unitssee wwwadlatusorg

11 Maintenance cyclesAt least once per annum at least twice per annum for biologi-cally produced methaneIf the flow rate drops clean the strainer

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 53

12 Glossary12 1 Diagnostic coverage DCMeasure of the effectiveness of diagnostics which may be determined as the ratio between the failure rate of detected dangerous failures and the failure rate of total dangerous failuresNOTE Diagnostic coverage can exist for the whole or parts of a safety-related system For example diagnostic cover-age could exist for sensors andor logic system andor final elements Unit see EN ISO 13849-12008

12 2 Mode of operationHigh demand mode or continuous modeOperating mode where the frequency of demands for opera-tion made on a safety-related system is greater than one per year or greater than twice the proof-test frequencysee EN 61508-42008

12 3 CategoryClassification of the safety-related parts of a control system in respect of their resistance to faults and their subsequent behaviour in the fault condition and which is achieved by the structural arrangement of the parts fault detection andor by their reliability see EN ISO 13849-12008

12 4 Common cause failure CCFFailures of different items resulting from a single event where these failures are not consequences of each othersee EN ISO 13849-12008

12 5 Fraction of undetected common cause failures β Fraction of undetected failures of redundant components due to a single event whereby these failures are not based on mutual causesNOTE β is expressed as a fraction in the equations and as a percentage elsewheresee EN 61508-62010

12 6 B10d valueMean number of cycles until 10 of the components fail dan-gerouslysee EN ISO 13849-12008

12 7 T10d valueMean time until 10 of the components fail dangerouslysee EN ISO 13849-12008

12 8 Hardware fault tolerance HFTA hardware fault tolerance of N means that N + 1 is the mini-mum number of faults that could cause a loss of the safety functionsee IEC 61508-22010

12 9 Mean dangerous failure rate λD Mean rate of dangerous failures during operation time (T10d) Unit 1hsee EN ISO 13849-12008

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 54

12 10 Safe failure fraction SFFFraction of safe failures related to all failures which are as-sumed to appearsee EN 13611A22011

12 11 Probability of dangerous failure PFHD Value describing the likelihood of dangerous failure per hour of a component for high demand mode or continuous mode Unit 1hsee EN 13611A22011

12 12 Mean time to dangerous failure MTTFd Expectation of the mean time to dangerous failuresee EN ISO 13849-12008

12 13 Demand rate nop Mean number of annual operationssee EN ISO 13849-12008

12 14 Average probability of dangerous failure on demand PFDavg (LDM = 1 ndash 10 switching cyclesyear)Average probability of a dangerous failure of the safety function on demand (LDM = low demand mode)see EN 61508-6

Glossary

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415

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Remarks

(Adobe Reader 7 or higher required) wwwadobecom

Elster GmbH Postfach 2809 middot 49018 Osnabruumlck Strotheweg 1 middot 49504 Lotte (Buumlren) GermanyT +49 541 1214-0 F +49 541 1214-370 infokromschroedercomwwwkromschroedercom

The current addresses of our international agents are available on the Internetwwwkromschroederdeindexphpid=718ampL=1

We reserve the right to make technical modifications in the interests of progressCopyright copy 2015 Elster GmbH All rights reserved

Contact

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0325

0530

  • Pressure regulators with solenoid valve VAD VAG VAV VAH
  • Flow rate regulator VRH
  • Pressure regulators with double solenoid valve VCD VCG VCV VCH
  • Contents
  • 1 Application
    • 11 Examples of application
      • 111 Constant pressure control
      • 112 Constant pressure control with two gas solenoid valves
      • 113 Constant pressure control with max pressure switch
      • 114 Constant pressure control with non-controlled pilot gas outlet
      • 115 Modulating control
      • 116 Modulating control with two gas solenoid valves
      • 117 Modulating control with two gas solenoid valves and inlet pressure switch
      • 118 HighLow control
      • 119 Zero pressure control
      • 1110 Staged flow rate control
      • 1111 Continuous or staged flow rate control
      • 1112 Modulating control with variable airgas ratio control with gas solenoid valve
      • 1113 Modulating control in residential heat generation
          • 2 Certification
          • 3 Function
            • 31 VAD VAG VAH VRH VAV
              • 311 Pressure regulator for gas VAD
              • 312 Airgas ratio control VAG
              • 313 Flow rate regulators VAH VRH
              • 314 Variable airgas ratio control VAV
              • 315 Pressure regulator with gas solenoid valve VAxS position indicator with visual indicator
                • 32 Animation
                • 33 Connection diagram
                  • 331 VAx with M20 cable gland
                  • 332 VAx with plug
                  • 333 VAS with VADVAGVAHVAV with M20 cable gland
                  • 334 VAS with VADVAGVAHVAV with plug
                      • 4 Replacement possibilities for MODULINE pressure regulators with gas solenoid valve
                        • 41 GVS GVI GVIB GVR and GVRH are to be replaced by VAD VAG VAG+VAS VAH and VAV
                          • 5 Flow rate
                            • 51 Selection example for VAD
                              • 511 Calculate VAD
                                • 52 Selection example for VAG VAH VRH VAV
                                  • 521 CalculateVAG VxHVAV
                                    • 53 Selection example for zero governor VAGN
                                      • 531 Calculate VAGN
                                          • 6 Selection
                                            • 61 Selection table for pressure regulator with solenoid valve VAD
                                            • 62 Type code for VAD
                                            • 63 Selection table for airgas ratio control with solenoid valve VAG flow rate regulators VAH VRH
                                            • 64 Type code for VAG VAH VRH
                                            • 65 Selection table for variable airgas ratio control with solenoid valve VAV
                                            • 66 Type code for VAV
                                            • 67 Accessories
                                              • 7 Project planning information
                                                • 71 Installation
                                                  • 711 Installation position
                                                    • 72 Setting the low-fire rate on VAG VAH VRH VAV
                                                    • 73 Setting the high-fire rate on VAV
                                                      • 731 Calculation
                                                          • 8 Accessories
                                                            • 81 Gas pressure switch DGVC for VAx VRH
                                                            • 82 Gas pressure switch DGVCT for VAxT VRHT
                                                            • 83 Bypass valvepilot gas valve VAS 1
                                                              • 831 VAS 1 attached to VADVAGVAHVAV 1
                                                              • 832 VAS 1 attached to VADVAGVAHVAV 2 VADVAGVAHVAV 3
                                                              • 833 Flow rate
                                                                • 84 Bypass valvepilot gas valve VBY 8 for VADVAGVAHVAV 1
                                                                  • 841 Scope of delivery VBY 8I as bypass valve
                                                                  • 842 Scope of delivery VBY 8R as pilot gas valve
                                                                  • 843 Selection
                                                                  • 844 Type code
                                                                  • 845 Flow rate
                                                                  • 846 Technical data
                                                                    • 85 Tightness control TC 116V
                                                                    • 86 Pressure test points
                                                                    • 87 Cable gland set
                                                                    • 88 Seal set VA 1thinspndashthinsp3
                                                                    • 89 Differential pressure orifice
                                                                    • 810 Retaining frame
                                                                    • 811 Attachment block
                                                                    • 812 Gas control line
                                                                    • 813 Measuring orifice VMO
                                                                    • 814 Filter module VMF
                                                                    • 815 Fine-adjusting valve VMV
                                                                      • 9 Technical data
                                                                        • 91 VAD
                                                                        • 92 VAG
                                                                        • 93 VAH VRH
                                                                        • 94 VAV
                                                                        • 95 Safety-specific characteristic values for VAx 1thinspndashthinsp3
                                                                          • 951 Determining the PFHD value the λD value and the MTTFd value
                                                                          • 952 Calculating the PFHD and PFDavg
                                                                            • 96 Dimensions
                                                                              • 10 Converting units
                                                                              • 11 Maintenance cycles
                                                                              • 12 Glossary
                                                                                • 121 Diagnostic coverage DC
                                                                                • 122 Mode of operation
                                                                                • 123 Category
                                                                                • 124 Common cause failure CCF
                                                                                • 125 Fraction of undetected common cause failures β
                                                                                • 126 B10d value
                                                                                • 127 T10d value
                                                                                • 128 Hardware fault tolerance HFT
                                                                                • 129 Mean dangerous failure rate λD
                                                                                • 1210 Safe failure fraction SFF
                                                                                • 1211 Probability of dangerous failure PFHD
                                                                                • 1212 Mean time to dangerous failure MTTFd
                                                                                • 1213 Demand rate nop
                                                                                • 1214 Average probability of dangerous failure on demand PFDavg
                                                                                  • Feedback
                                                                                  • Contact
                                                                                      1. naechste_Seite 24
                                                                                      2. naechste Seite 18
                                                                                      3. naechste Seite 6
                                                                                      4. naechste Seite 16
                                                                                      5. naechste Seite 14
                                                                                      6. naechste Seite 25
                                                                                      7. naechste_Seite 11
                                                                                      8. naechste_Seite 17
                                                                                      9. fbArbeitspunkt_Min Ja
                                                                                      10. fbArbeitspunkt Ja
                                                                                      11. ftProgramm Standard-Programm
                                                                                      12. fz_kv
                                                                                      13. fz_pe 80
                                                                                      14. fz_pG 60
                                                                                      15. fzDelta_p_Soll 20
                                                                                      16. ftEinheit_Druck mbar
                                                                                      17. fatTyp [115]
                                                                                      18. fbArbeitspunkt_Min_2 Ja
                                                                                      19. fbArbeitspunkt_2 Ja
                                                                                      20. ftRegler_Typ VAG
                                                                                      21. ftProgramm_2 Standard-Programm
                                                                                      22. fz_kv_2
                                                                                      23. fatMedium [08]
                                                                                      24. fzDichte 08
                                                                                      25. ftEinheit_Dichte kgm3
                                                                                      26. fzV_Norm 30
                                                                                      27. ftEinheit_Volstrom m3h
                                                                                      28. fz_pe_2 80
                                                                                      29. fz_pG_2 60
                                                                                      30. fzDelta_p_Soll_2 20
                                                                                      31. ftEinheit_Druck2 [mbar]
                                                                                      32. ftEinheit_Geschw [ms]
                                                                                      33. fatTyp_2 [10954451150103322]
                                                                                      34. fbArbeitspunkt_Min_3 Ja
                                                                                      35. fbArbeitspunkt_3 Ja
                                                                                      36. ftProgramm_3 Standard-Programm
                                                                                      37. fz_kv_3
                                                                                      38. fz_pe_3 20
                                                                                      39. fz_pG_3 0
                                                                                      40. fzDelta_p_Soll_3 20
                                                                                      41. fatTyp_3 [123]
                                                                                      42. fatSchaltleistung [6363683]
                                                                                      43. fz_nop_Stunde 1
                                                                                      44. fz_nop_Jahr 8760
                                                                                      45. fzZyklus 3600
                                                                                      46. fzB10d 6363683
                                                                                      47. fzT10d 10
                                                                                      48. fzPFHd_1V 15714170551864384e-8
                                                                                      49. fzPFDavg_1V
                                                                                      50. ftGeeignet_1V PL d SIL 2
                                                                                      51. fzPFHd_2V 33505832253532625e-10
                                                                                      52. fzPFDavg_2V
                                                                                      53. ftGeeignet_2V PL e SIL 3
                                                                                      54. ftUebersicht Off
                                                                                      55. ftVerstaendlichkeit Off
                                                                                      56. ftFehlende_Info
                                                                                      57. ftUmfang Off
                                                                                      58. ftVerwendung_1 Off
                                                                                      59. ftVerwendung_2 Off
                                                                                      60. ftVerwendung_3 Off
                                                                                      61. ftVerwendung_4 Off
                                                                                      62. ftNavigation Off
                                                                                      63. ftTaetigkeitsbereich Off
                                                                                      64. ftBemerkung
                                                                                      65. Michael Rehkamp Elster Kromschroumlder>btnSenden
Page 21: VAD, VAG, VAV, VAH, VRH, VCD, VCG, VCV, VCH · PDF fileVAD, VAG, VAH, VAV, VRH, VCD, VCG, VCV, VCH · Edition 04.15 6 VAD VAD VAS 1 .1 Examples of application 1 .1 .1 Constant pressure

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 21

3 3 Connection diagramWiring to EN 60204-1Connection diagram for VAxS with position indicator ndash see page 19 (Pressure regulator with gas solenoid valve VAxS position indicator with visual indicator)

3 3 1 VAx with M20 cable gland

L1 (+)

N (ndash)

3 3 2 VAx with plug

1 = N (-)

2 = L1 (+)

3 3 3 VAS with VADVAGVAHVAV with M20 cable glandL1V1 (+)

N (-)

L1V2 (+)

3 3 4 VAS with VADVAGVAHVAV with plug2 = L1V1 (+)

1 = N (-)

3 = L1V2 (+)

Function

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 22

4 Replacement possibilities for MODULINE pressure regulators with gas solenoid valve4 1 GVS GVI GVIB GVR and GVRH are to be replaced by VAD VAG VAG+VAS VAH and VAV

Type TypeGVS Pressure regulator with gas solenoid valve Pressure regulator with gas solenoid valve VADGVI Airgas ratio control with gas solenoid valve Airgas ratio control with gas solenoid valve VAG

GVIB Airgas ratio control with gas solenoid valve and bypass valve

Airgas ratio control with gas solenoid valve and bypass valve VAG+VAS

GVRH Flow rate regulator with gas solenoid valve Flow rate regulator with gas solenoid valve VAHGVR Variable airgas ratio control with gas solenoid valve Variable airgas ratio control with solenoid valve VAV115125 Flange 38 Size 115

Size 125 on request

115125 Flange frac12 Size 115

Size 125 Size 1 DN 15 115

115125 Flange frac34 Size 115

Size 125 Size 1 DN 20 120

115125 Flange 1 Size 115

Size 125 Size 1 DN 25 125

232240 Flange 1 Size 232

Size 240 on request

232240 Flange 1frac12 Size 232

Size 240 Size 2 DN 40 240

350 Flange 1frac12 Size 350 on request350 Flange 2 Size 350 Size 3 DN 50 350ML MODULINE + Rp internal thread connection fl anges Rp internal thread RTML MODULINE + NPT internal thread connection fl anges NPT internal thread N01 pu max 100 mbar (15 psig) pu max 500 mbar (7 psig) 02 200 mbar (3 psig) 500 mbar (7 psig)

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 23

Replacement possibilities for MODULINE pressure regulators with gas solenoid valve gt GVS GVI GVIB GVR and GVRH are to be replaced by VAD VAG VAG+VAS VAH and VAV

ContinuationType Type

Quick opening Quick opening NF1 Control ratio 11 Control ratio 11 K Mains voltage 24 V DC Mains voltage 24 V DC K

ndash 100 V AC PQ 120 V AC 120 V AC Q

ndash 200 V AC YT 220240 V AC 230 V AC W3 Electrical connection via terminals Electrical connection via terminals 6 Electrical connection via socket Electrical connection via socket 9 Metal terminal connection box Electrical connection via terminals S Position indicator Position indicator with visual indicator SG Position indicator for 24 V Position indicator for 24 V with visual indicator GM Suitable for biologically produced methane Suitable for biologically produced methane

Pressure test point at the inlet Pressure test point at the inlet and outlet Outlet pressure pd -25

Outlet pressure pd 25 ndash 25 mbar (1 ndash 10 WC)

2 ndash 90 mbar (08 ndash 36 WC) 20 ndash 50 mbar (8 ndash 20 WC) -5035 ndash 100 mbar (14 ndash 40 WC) -100Standard seat A

ExampleGVS 350ML01T3with Rp 2 connection flanges

ExampleVAD 350RNW-100A

with test points

= standard = available Pressure test points may be attached at the left- andor right-hand side Position indicator with visual indicator can be attached at the left- or right-hand side

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 24

∆p [i

nch

WC]

Qn [SCFH]100 400 600 4000 60001000 200020 30 40 50 200 3006015 80

1

08

1

2

3

4

56

8

10

20

30

40

5060

80

100

200

∆p [m

bar]

5

8

3

20

10

30

40

80

60

300

400

50

04 06 1 2 3 4 5 808 10 20 30 402

03 60 100 200

100

200

500

1

3

2

04 06 08 1 2 3 4 5 6 8 10 20 30 40

04 06 08 1 2 3 4 5 6 8 10

200

80 10020 3003

03Qn [m3h]

02

50 60 80 100

40 50 60

VAD

115

B

VAD

120

AVA

D 12

5A

P1P2

VAD

240

AVA

D 35

0A

= natural gas (ρ = 080 kgm3) = propane (ρ = 201 kgm3) = air (ρ = 129 kgm3)

The characteristic flow rate curves have been meas-ured with the specified flanges and a fitted strainer If two or more valves are combined the pressure loss of each additional valve drops by approx 5

metric imperial

Enter densityFlow rate Qn

Inlet pressure pu

Outlet pressure pd

Product RV v

Pressure loss ∆p

∆pmin

5 Flow rate5 1 Selection example for VADNatural gas Flow rate Qmax = 30 m3h Inlet pressure pu = 80 mbar Outlet pressure pd = 60 mbarThe desired control ratio from high-fire to low-fire rate is RV = 101High fire ∆p = pu - pd = 20 mbar Point P1Low fire Point P2 Qmin = 26 m3h at ∆p = 20 mbar RV = Qmax Qmin = 1151

Point P1 and point P2 must be within the working range of a unit size We recommend that you select the smallest size to achieve the best control properties

5 1 1 Calculate VAD

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 25

∆p [i

nch

WC]

Qn [SCFH]100 400 600 4000 60001000 200020 30 40 50 200 3006015 80

1

08

1

2

3

4

56

8

10

20

30

40

5060

80

100

200

∆p [m

bar]

5

8

3

20

10

30

40

80

60

300

400

50

04 06 1 2 3 4 5 808 10 20 30 402

03 60 100 200

100

200

500

1

3

2

04 06 08 1 2 3 4 5 6 8 10 20 30 40

04 06 08 1 2 3 4 5 6 8 10

200

80 10020 3003

03Qn [m3h]

02

50 60 80 100

40 50 60

= pd min lt 5 mbar

VAG

VxH

VAV

115

BVA

GV

xHV

AV 12

0A

VAG

VxH

VAV

125

A

P1

P2

VAG

VxH

VAV

240

AVA

GV

xHV

AV 3

50A

= natural gas (ρ = 080 kgm3) = propane (ρ = 201 kgm3) = air (ρ = 129 kgm3)

The characteristic flow rate curves have been meas-ured with the specified flanges and a fitted strainer If two or more valves are combined the pressure loss of each additional valve drops by approx 5

5 2 Selection example for VAG VAH VRH VAV Natural gas Flow rate Qmax = 30 m3h Inlet pressure pu = 80 mbar Outlet pressure pd max VAG = 60 mbarThe desired control ratio from high-fire to low-fire rate is RV = 101High fire ∆p = pu - pd max = 20 mbar Point P1Low fire pd min = pd max RV2 = 06 mbar Qmin = Qmax RV = 3 m3h ∆p = pu - pd min = 794 mbar Point P2 select VAG 120APoint P1 and point P2 must be within the working range of a unit size We recommend that you select the smallest size to achieve the best control properties

metric imperial

Enter densityFlow rate Qn

Inlet pressure pu

Outlet pressure pd

Product RV v

5 2 1 Calculate VAG VxH VAV

Pressure loss ∆p

∆pmin

Flow rate

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 26

∆p [i

nch

WC]

Qn [SCFH]100 400 600 4000 60001000 200020 30 40 50 200 3006015 80

1

08

1

2

3

4

56

8

10

20

30

40

5060

80

100

200

∆p [m

bar]

5

8

3

20

10

30

40

80

60

300

400

50

04 06 2 3 4 5 808 10 20 30 402

03 60 100 200

100

200

500

1

3

2

04 06 08 1 2 3 4 5 6 8 10 20 30 40

04 06 08 1 2 3 4 5 6 8 10

200

80 10020 3003

03Qn [m3h]

02

50 60 80 100

40 50 60

VAG

115

N

P1VAG

125

N

VAG

120

N

VAG

240

NP2

VAG

350

N

= natural gas (ρ = 080 kgm3) = propane (ρ = 201 kgm3) = air (ρ = 129 kgm3)

The characteristic flow rate curves have been meas-ured with the specified flanges and a fitted strainer If two or more valves are combined the pressure loss of each additional valve drops by approx 5

5 3 Selection example for zero governor VAG NNatural gas Flow rate Qmax = 30 m3h Inlet pressure pu = 20 mbar Outlet pressure pd = 0 mbar (atmospheric pressure)The desired control ratio from high-fire to low-fire rate is RV = 101High fire ∆p = pu - pd max = 20 mbar Point P1Low fire Point P2 Qmin = 24 m3h at ∆p = 20 mbar RV = Qmax Qmin = 1231Point P1 and point P2 must be within the working range of a unit size We recommend that you select the smallest size to achieve the best control properties

metric imperial

Enter densityFlow rate Qn

Inlet pressure pu

Outlet pressure pd

Product RV

5 3 1 Calculate VAG N

Pressure loss ∆p

∆pmin

Flow rate

v

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 27

6 Selection6 1 Selection table for pressure regulator with solenoid valve VAD

Accessories right Accessories left

Type1) T R N F N K P Q Y W S2) G2) R2) L2) M20

cab

le g

land

Plug

with

soc

ket

Plug

with

out s

ocke

t

-25-50 -100 A B Scre

w p

lug

Pres

sure

test

poi

nt

DG

17V

C 3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

Scre

w p

lug

Pres

sure

test

poi

nt

DG

17V

C 3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

VAD 115

VAD 120

VAD 125

VAD 240

VAD 350

= standard = available1) The following nominal inlet fl ange diameters are also available size 1 with nominal diameter DN 10 size 2 with nominal diameters DN 25 DN 32 and DN 50 size 3 with nominal diameters DN 40 and DN 652) Position indicator and bypasspilot gas valve cannot be fi tted together on the same side3) Specify the test point for inlet pressure pu or outlet pressure pdHelp for selecting the pressure regulator VAD can be found on the ProFi DVD wwwkromschroedercom Products DVD Product fi nder ldquoProFirdquo

Order exampleVAD 240RNW-100A

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 28

Selection

6 2 Type code for VADCode DescriptionVAD Pressure regulator with solenoid valve1 ndash 3 SizeT T-product10 ndash 65 Nominal inlet and outlet diameterRNF

Rp internal threadNPT internal thread

ISO fl angeN Quick opening quick closingKPQYW

Mains voltage 24 V DCMains voltage 100 V AC 5060 HzMains voltage 120 V AC 5060 HzMains voltage 200 V AC 5060 HzMains voltage 230 V AC 5060 Hz

SG

Position indicator with visual indicatorPosition indicator for 24 V with visual indicator

RL

Viewed from the right (in the direction of fl ow)Viewed from the left (in the direction of fl ow)

-25-50-100

Outlet pressure pd 25 ndash 25 mbar20 ndash 50 mbar

35 ndash 100 mbarAB

Standard valve seatReduced valve seat

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 29

Selection

6 3 Selection table for airgas ratio control with solenoid valve VAG flow rate regulators VAH VRH

Type1) T R N F N K P Q Y W S2) G2) R2) L2) M20

cab

le g

land

Plug

with

soc

ket

Plug

with

out s

ocke

t

A B E K A N Scre

w p

lug

Pres

sure

test

poi

ntD

G 1

7VC

3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

Scre

w p

lug

Pres

sure

test

poi

ntD

G 1

7VC

3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

VAG 115 VAG 120 VAG 125 VAG 240 VAG 350

VAH 115 VAH 120 VAH 125 VAH 240 VAH 350

VRH 115 VRH 120 VRH 125 VRH 240 VRH 350

= standard = available1) The following nominal inlet fl ange diameters are also available size 1 with nominal diameter DN 10 size 2 with nominal di-

ameters DN 25 DN 32 and DN 50 size 3 with nominal diameters DN 40 and DN 652) Position indicator and bypasspilot gas valve cannot be fi tted together on the same side3) Specify the test point for inlet pressure pu or outlet pressure pdHelp for selecting the regulators can be found on the ProFi DVD wwwkromschroedercom Products DVD Product fi nder ldquoProFirdquo

Order exampleVAG 240RNWAE

Accessories right Accessories left

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 30

Selection

6 4 Type code for VAG VAH VRHCode DescriptionVAGVAHVRH

Airgas ratio control with solenoid valveFlow rate regulator with solenoid valve

Flow rate regulator1 ndash 3 SizeT T-product15 ndash 50 Nominal inlet and outlet diameterRNF

Rp internal threadNPT internal thread

ISO fl angeN1) Quick opening quick closingK1)

P1)

Q1)

Y1)

W1)

Mains voltage 24 V DCMains voltage 100 V AC 5060 HzMains voltage 120 V AC 5060 HzMains voltage 200 V AC 5060 HzMains voltage 230 V AC 5060 Hz

S1)

G1)Position indicator with visual indicator

Position indicator for 24 V with visual indicatorRL

Viewed from the right (in the direction of fl ow)Viewed from the left (in the direction of fl ow)

AB

Standard valve seatReduced valve seat

EKAN

Connection kit for air control pressure psaVAG VAH VRH compression fi tting

VAG plastic hose couplingVAG VAH VRH NPT 18 adapter

VAG zero governor1) Only available for VAG VAV VAH

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 31

6 5 Selection table for variable airgas ratio control with solenoid valve VAVAccessories right Accessories left

Type1) T R N F N K P Q Y W S2) G2) R2) L2) M20

cab

le g

land

Plug

with

soc

ket

Plug

with

out s

ocke

t

A B E K A Scre

w p

lug

Pres

sure

test

poi

ntD

G 1

7VC

3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

Scre

w p

lug

Pres

sure

test

poi

ntD

G 1

7VC

3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

VAV 115

VAV 120

VAV 125

VAV 240

VAV 350

= standard = available1) The following nominal inlet fl ange diameters are also available size 1 with nominal diameter DN 10 size 2 with nominal diameters DN 25 DN 32 and DN 50 size 3 with nominal diameters DN 40 and DN 652) Position indicator and bypasspilot gas valve cannot be fi tted together on the same side3) Specify the test point for inlet pressure pu or outlet pressure pdHelp for selecting the variable airgas ratio control VAV can be found on the ProFi DVD wwwkromschroedercom

Products DVD Product fi nder ldquoProFirdquo

Order exampleVAV 240RNWAK

Selection

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 32

Selection

6 6 Type code for VAVCode DescriptionVAV Variable airgas ratio control with solenoid valve1 ndash 3 SizeT T-product15 ndash 50 Nominal inlet and outlet diameterRNF

Rp internal threadNPT internal thread

ISO fl angeN Quick opening quick closingKPQYW

Mains voltage 24 V DCMains voltage 100 V AC 5060 HzMains voltage 120 V AC 5060 HzMains voltage 200 V AC 5060 HzMains voltage 230 V AC 5060 Hz

SG

Position indicator with visual indicatorPosition indicator for 24 V with visual indicator

RL

Viewed from the right (in the direction of fl ow)Viewed from the left (in the direction of fl ow)

AB

Standard valve seatReduced valve seat

EKA

Connection kit for air control pressure psa and combus-tion chamber control pressure psc

compression fi ttingplastic hose coupling

NPT 18 adapter

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 33

Selection

6 7 AccessoriesModularly configurable withndash Screw plugsndash Pressure test pointsndash Pressure switch DGVC for inlet

andor outlet pressurendash Tightness control TCndash Bypasspilot gas valve VBY 8 for

size 1ndash Bypasspilot gas valve VAS 1For further information see page 37 (Accessories)

Position indicator

Plug with socket

Plug

Screwplugs

Pressuretest points

Pressure switch DGC Tightness

control TC

Bypasspilot gas valve VBY 8 for size 1

Bypasspilot gas valve VAS 1

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 34

7 Project planning informationDo not store or install the unit in the open airThe inlet pressure pu and the outlet pressure pd can be meas-ured on both sides of the valve body To increase the control accuracy an external impulse line can be connected instead of the pressure test point pd

VAD

pu

pd

(psa)

VAGpd

pu

psa

psa

VAD measurement point for the gas outlet pressure pd on the regulator body A combustion chamber control line (psc) can be connected to connection psa for maintaining a constant burner capacityVAG additional measurement point for the air control pressure psa on the regulator body

VAV

psapsc

pu

pd

VAH VRH

pu

pd-

pdpsa-

psa

VAV measurement point for the outlet pressure pd on the regulator bodyVAH additional measurement points for the outlet pressure pd- and the air control pressure psapsa- on the regulator body

7 1 Installation

GFK

VAGVAH

GFKVAD

Sealing material and thread cuttings must not be allowed to get into the valve housing Install a filter upstream of every system

gt20 mmgt0 79

The unit must not be in contact with masonry Minimum clear-ance 20 mm (079 inches)Ensure that there is sufficient space for installation and ad-justment

le +100 degCle +212 degF

The solenoid body heats up during operation ndash depending on ambient temperature (max 60degC140degF) and intrinsic heating (approx 40degC104degF)

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 35

In the case of double solenoid valves the position of the con-nection box can only be changed by removing the actuator and reinstalling it offset by 90deg or 180deg

If more than three valVario controls are installed in line the controls must be supported

The seals in some gas compression fittings are approved for temperatures of up to 70degC (158degF) This temperature limit will not be exceeded if the flow through the pipe is at least 1 msup3h (3531 SCFH) of gas and the maximum ambient temperature is 50degC (122degF)

7 1 1 Installation position

pu ge 80 mbar(80 hPa32 WC)

VAD VAG VAH VRH VAV

In humid environments black solenoid actuator in the vertical upright position only

VAD VAG VAH VRH black solenoid actuator in the vertical upright position or tilted up to the horizontal not upside downVAG VAH horizontal position only if pu ge 80 mbar (32 WC))VAV installation in the vertical position only black solenoid actuator in the vertical upright positionTo ensure that the airgas ratio control VAG the flow rate regulator VAH VRH or the variable airgas ratio control VAV can react quickly when the load is changed the impulse line for the air control pressure psa and for VAV the impulse line for the combustion chamber control pressure psc should be kept as short as possible The tube internal diameter for the impulse line must always be ge 39 mm (015)

VAH VRHIt is not permitted to install a gas solenoid valve VAS down-stream of flow rate regulator VAH VRH and upstream of fine-adjusting valve VMV The VAS would no longer be able to perform its function as a second safety valve if installed in the above-mentioned position

M

VMV

VAH

VASVAS

pd-

psa-psa

VMV

VAH pd-

psa-psa

The measuring orifice in the air line for impulse lines psa and psa- must always be installed downstream of the air control valve

Project planning information gt Installation

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 36

VAVThe impulse line for the combustion chamber control pres-sure psc must be fitted so that no condensation can enter the pressure regulator but rather flows back into the combustion chamber

7 2 Setting the low-fire rate on VAG VAH VRH VAV

-10 +05-05

ndash

+1

-15

mbar

+15

06

1 152

3

N V

+ +ndash

+30 -15+15

ndash

-3

+5

mbar

-5

N

+

VAG VAH VRH VAV

If the burner operates at low-fire rate the gasair mixture can be changed using the parallel shift of the characteristic curve by turning the adjusting screw ldquoNrdquoAdjusting range at low fire VAG VAH VRH -5 to +5 mbar (-195 to +195 WC) VAV -15 to +15 mbar (-06 to +06 WC)

7 3 Setting the high-fire rate on VAVTo set the high-fire rate the transmission ratio is changed us-ing the adjusting screw ldquoVrdquo until the required flue gas values are achievedTransmission ratio V = pdpsa = 061 to 31The settings N and V can influence each other and must be repeated if necessary

+N+V

-V

-N

VAV

psa [mbar]

p d [m

bar]

7 3 1 CalculationWith no connection to the combustion chamber control pres-sure psc pd = V times psa + NWith connection to the combustion chamber control pressure psc (pd - psc) = V times (psa - psc) + N

Project planning information

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 37

pu pd

21579

4836

085310

189

142

8 Accessories8 1 Gas pressure switch DG VC for VAx VRHType Adjusting range [mbar]DG 17VC 2 to 17DG 40VC 5 to 40DG 110VC 30 to 110DG 300VC 100 to 300

Scope of delivery 1 times pressure switch for gas 2 times retaining screws 2 times sealing rings

8 2 Gas pressure switch DG VCT for VAx T VRH TType Adjusting range [WC]DG 17VCT 08 to 68DG 40VCT 2 to 16DG 110VCT 12 to 44DG 300VCT 40 to 120

Scope of delivery 1 times gas pressure switch with AWG 18 connection wires 2 times retaining screws 2 times sealing ringsMonitoring the inlet pressure pu the electrical plug of the pressure switch for gas points towards the inlet flangeMonitoring the outlet pressure pd the electrical plug of the pressure switch for gas points towards the outlet flange

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 38

A BC

D

FE

ACD

F

B

E

8 3 Bypass valvepilot gas valve VAS 18 3 1 VAS 1 attached to VADVAGVAHVAV 1Scope of delivery A 1 times bypasspilot gas valve VAS 1 B 4 times O-rings C 4 times double nuts D 4 times connection parts E 1 times mounting aidBypass valve VAS 1 F 2 times connection pipes if the bypass valve has a blind flange

at the outlet sidePilot gas valve VAS 1 F 1 times connection pipe 1 times sealing plug if the pilot gas valve

has a threaded flange at the outlet side

Accessories

8 3 2 VAS 1 attached to VADVAGVAHVAV 2 VADVAGVAHVAV 3Scope of delivery A 1 times bypasspilot gas valve VAS 1 B 4 times O-rings C 4 times spacer sleeves D 4 times connection parts E 1 times mounting aidBypass valve VAS 1 F 2 times connection pipes if the bypass valve has a blind flange

at the outlet sidePilot gas valve VAS 1 F 1 times connection pipe 1 times sealing plug if the pilot gas valve

has a threaded flange at the outlet side

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 39

2

3

456

810

20

30

405060

80100

∆p [m

bar]

005 01 02 03 05 08 1 2 3 4 51

3

2

Qn [m3h]

1

01

02

03

0405

08

003

002

6 8 10

005 01 02 03 05 08 1 2 3 4 5003 6 8 10

20

005 01 02 03 05 08 1 2 3 4 5003 6 8 10 20

30

∆p [i

nch

WC]

1

2

3

456

810

20

30

40

04

004

006

00801

02

03

0506

08

Qn [SCFH]10 40 60 100 200 3001 500 10002 3 4 5

120 306 8

21 3 4 5 6 7 8 910

8 3 3 Flow rate

The characteristic flow rate curves have been measured for bypass valve VAS 1 with connection pipe diameter 1 to 10 mm (004 to 04) and for the pilot gas valve with 10 mm (04) connection pipe

Bypass valve connection pipe diameter [mm]

Pilo

t gas

val

ve 1

0 m

m (0

4)

conn

ectio

n pi

pe d

iam

eter

Accessories gt Bypass valvepilot gas valve VAS 1

= natural gas (ρ = 080 kgm3) = propane (ρ = 201 kgm3) = air (ρ = 129 kgm3)

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 40

Accessories

8 4 Bypass valvepilot gas valve VBY 8 for VADVAGVAHVAV 1

B

C

AVBY 8

VAx 1

55

(217)40(157)

70 (276)

80(315)

Rp frac14(pilot gas valve)

For mounting on VAD VAG VAH VAV 1 and double solenoid valve VCD VCG VCH VCV 1

8 4 1 Scope of delivery VBY 8I as bypass valveA 1 times bypass valve VBY 8IB 2 times retaining screws with 4 times O-rings both retaining screws

have a bypass orificeC 1 times grease for o-rings

8 4 2 Scope of delivery VBY 8R as pilot gas valveA 1 times pilot gas valve VBY 8RB 2 times retaining screws with 5 x O-rings one retaining screw

has a bypass orifice (2 x O-rings) the other does not (3 x O-rings)

C 1 times grease for O-rings

8 4 3 SelectionType I R W Q K 6L -R -L E B D 05

VBY 8

Order exampleVBY 8RW6L-LED

8 4 4 Type codeCode DescriptionVBY Gas solenoid valve8 Nominal sizeIR

For internal gas pick-up as bypass valveFor external gas pick-up as pilot gas valve

KQW

Mains voltage 24 V DC Mains voltage 120 V AC 5060 HzMains voltage 230 V AC 5060 Hz

6L Electrical connection via plug and socket with LED-R-L

Attachment side of main valve right-hand sideAttachment side of main valve left-hand side

EB

Attached to the VAxEnclosed (separate packing unit)

05D

Nozzle diameter = 05 mm (002)Flow adjustment

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 41

2

01

02

03

05

081

3

456

810

20

30

405060

80100

∆p [m

bar]

1

3

201 02 03 05 1 2 3001 003 4

Qn [m3h]

02 03 05 1 2

01 02 05

002 006

002

002 006 1

0010006 005 01

001

0003

0006 2 3

VBY 8DVBY 805

∆p [i

nch

WC]

1

2

3

456

810

20

30

40

040506

08

1

Qn [SCFH]10 40 60 1005 2081 2 30402

01

02

03

004005006

008

Adjusting range

8 4 5 Flow rateVBY 8 D

+

-

The flow rate can be set by turning the flow rate restrictor (4 mm016 Allen screw) frac14 of a turn Flow rate 10 to 100

VBY 8 05The flow is routed through a 05 mm (002) nozzle and thus has a fixed characteristic flow rate curve Adjustment is not possible

8 4 6 Technical dataInlet pressure pu max 500 mbar (7 psig)Ambient temperature 0 to +60degC (32 to 140degF) no condensation permittedStorage temperature 0 to +40degC (32 to 104degF) no condensation permittedPower consumption 24 V = 8 W 120 V = 8 W 230 V = 95 WEnclosure IP 54

Accessories gt Bypass valvepilot gas valve VBY 8 for VADVAGVAHVAV 1

= natural gas (ρ = 080 kgm3) = propane (ρ = 201 kgm3) = air (ρ = 129 kgm3)

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 42

TC 116VB C

56(22)

49(193)

27(106)

A

A

VCx 1 VCx 2VCx 3

8 5 Tightness control TC 116Vfor VAx 1 ndash 3An adapter plate is required to attach the tightness control to the right- or left-hand side of the pressure regulator with gas solenoid valveScope of delivery A 1 times adapter plate B 2 times O-rings C 2 times retaining screwsFor attachment to left-hand side Order No 74922391 right-hand side Order No 74921995

8 6 Pressure test pointsTest points to check the inlet pressure pu and outlet pressure pdScope of delivery 1 x pressure test points with 1 x profiled sealing rings Order No 74923390

8 7 Cable gland setWhen wiring a double solenoid valve with pressure regula-tor VCx the connection boxes are to be connected using a cable gland setThe cable gland set can only be used if the connection boxes are at the same height and on the same side and if both valves are equipped either with or without a proof of closure switchVA 1 Order No 74921985 VA 2 Order No 74921986 VA 3 Order No 74921987

Accessories

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 43

A B

D

C

Accessories

8 9 Differential pressure orifice

Size PipeDN

Differential pressure orifi cewith outlet dia

1 15 17 mm 0671 20 25 mm 0981 25 30 mm 1182 40 46 mm 1813 50 58 mm 228

If pressure regulator VADVAGVAV 1 is retrofitted upstream of gas solenoid valve VAS 1 a DN 25 differential pressure orifice with outlet opening d = 30 mm (118) must be inserted at the outlet of the pressure regulatorIn the case of pressure regulator VAx 115 or VAx 120 the DN 25 differential pressure orifice must be ordered separately and retrofitted Order No 74922240

8 8 Seal set VA 1 ndash 3VA 1 Order No 74921988 VA 2 Order No 74921989 VA 3 Order No 74921990Scope of deliveryA 1 times double block seal B 2 times O-rings (flange) C 2 times O-rings (pressure switch) for pressure test pointscrew plug D 2 times sealing rings (flat sealing) and 2 times profiled sealing rings

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 44

BA

C

pd-

8 11 Attachment blockFor locked installation of pressure gauge and other acces-soriesScope of delivery A 1 times attachment block B 2 times self-tapping screws for installation C 2 times O-rings

Accessories

8 10 Retaining frameIn the event that a pressure regulator VAx is installed at a later point upstream of a gas solenoid valve VAS a measur-ing orifice VMO or a fine-adjusting valve VMV the retaining frame must be fitted at the inlet of the second device in order to fasten the differential pressure orifice at the regulator outlet Order the retaining frame separatelyRetaining frame for Size 1 Order No 74923029 Size 2 Order No 74923030 Size 3 Order No 74923031

8 12 Gas control lineFine-adjusting valve VMV can be installed on the flow rate regulator VAH for fine adjustment of the gas flow rateThe gas control line for gas outlet pressure pd- is available with 2 18 compression fittingsSize 1 Order No 74924458 Size 2 Order No 74924459

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 45

8 13 Measuring orifice VMOThe measuring orifice VMO is designed to reduce the gas and air flow rates and is installed downstream of the valVario control The measuring orifice is available with Rp internal thread (NPT internal thread) or flange to ISO 7005See wwwdocuthekcom Elster Kromschroumlder Krom-schroumlder LBE Products 03 Valves and butterfly valves valVario accessories Type of document Technical Informa-tion VMO

Accessories

8 14 Filter module VMFUsing the filter module VMF the gas flow upstream of the gas solenoid valve VAS and the airgas ratio control is cleaned The filter module is available with Rp internal thread (NPT internal thread) or flange to ISO 7005 and can also be supplied with fitted pressure switch as an optionSee wwwdocuthekcom Elster Kromschroumlder Krom-schroumlder LBE Products 03 Valves and butterfly valves valVario accessories Type of document Technical Informa-tion VMF

8 15 Fine-adjusting valve VMVThe flow rate is set using the fine-adjusting valve VMV The fine-adjusting valve is available with Rp internal thread (NPT internal thread) or flange to ISO 7005See wwwdocuthekcom Elster Kromschroumlder Krom-schroumlder LBE Products 03 Valves and butterfly valves valVario accessories Type of document Technical Infor-mation VMV

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 46

9 Technical dataGas types natural gas LPG (gaseous) biologically produced methane (max 01 -by-vol H2S) or clean air other gases on request The gas must be clean and dry in all temperature conditions and must not contain condensateCE and FM approved UL listed max inlet pressure pu 10 ndash 500 mbar (4 ndash 200 WC) FM approved (230 V AC 120 V AC 24 V DC) non opera-tional pressure 700 mbar (10 psig)ANSICSA approved (230 V AC 120 V AC 24 V DC) up to 350 mbar (5 psig)Opening time of the solenoid valve quick opening le 05 s Closing time quick closing lt 1 sMedium and ambient temperatures -20 to +60degC (-4 to +140degF) no condensation permittedStorage temperature -20 to +40degC (-4 to +104degF)Enclosure IP 65Valve housing aluminium valve seal NBRConnection flanges with internal thread Rp to ISO 7-1 NPT to ANSIASMESafety valve Class A to EN 161 Factory Mutual Research Class 7400 Process Control Valves (230 V AC 120 V AC 24 V DC) ANSI Z2121 and CSA 65 ANSI Z2118 and CSA 63Control class A to EN 88-1Control range up to 101

Mains voltage 230 V AC +10-15 5060 Hz 200 V AC +10-15 5060 Hz 120 V AC +10-15 5060 Hz 100 V AC +10-15 5060 Hz 24 V DC plusmn20Duty cycle 100Power factor of the solenoid coil cos φ = 09Power consumption

Type Voltage Power

VAx 1

24 V DC 25 W ndash100 V AC 25 W (26 VA)120 V AC 25 W (26 VA)200 V AC 25 W (26 VA)230 V AC 25 W (26 VA)

VAx 2 VAx 3

24 V DC 36 W ndash100 V AC 36 W (40 VA)120 V AC 40 W (44 VA)200 V AC 40 W (44 VA)230 V AC 40 W (44 VA)

VBY24 V DC 8 W ndash

120 V AC 8 W ndash230 V AC 95 W ndash

Cable gland M20 times 15Electrical connection cable with max 25 mm2 (AWG 12) or plug with socket to EN 175301-803

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 47

Position indicator contact rating

Type Voltage Min current(resistive load)

Max current(resistive load)

VAxS VCxS 12 ndash 250 V AC 5060 Hz 100 mA 3 AVAxG VCxG 12 ndash 30 V DC 2 mA 01 A

Position indicator switching frequency max 5 times per minute

Switching current [A]

Switching cyclescos φ = 1 cos φ = 06

01 500000 50000005 300000 250000

1 200000 1000003 100000 ndash

Limited to max 200000 cycles for heating systems

9 1 VADOutlet pressure pd VAD-25 25 ndash 25 mbar (1 ndash 10 WC) VAD-50 20 ndash 50 mbar (8 ndash 20 WC) VAD-100 35 ndash 100 mbar (14 ndash 40 WC)Combustion chamber control pressure psc (connection psa)

-20 to +20 mbar (-78 to +78 WC)

VAD

pu

pd

(psa)

9 2 VAGOutlet pressure pd 05 ndash 100 mbar (02 ndash 40 WC)Air control pressure psa 05 ndash 100 mbar (02 ndash 40 WC)

Adjusting range at low fire plusmn5 mbar (plusmn2 WC)Transmission ratio of gas to air 11The inlet pressure must always be higher than the air control pressure psa + pressure loss ∆p + 5 mbar (2 WC)

VAGpd

pu

psa

psa

VAGK 1 x 18 coupling for plastic hose (internal dia 39 mm (015) external dia 61 mm (024)) or VAGE 1 x 18 compression fitting for 6 times 1 tube or VAGA 1 x NPT 18 adapter or VAGN zero governor with breathing orifice

9 3 VAH VRHAir control pressure psa 06 ndash 100 mbar (024 ndash 40 WC) Differential air pressure ∆psa (psa - psa-) 06 ndash 50 mbar (024 ndash 197 WC) Differential gas pressure ∆pd (pd - pd-) 06 ndash 50 mbar (024 ndash 197 WC)Transmission ratio of gas to air 11The inlet pressure must always be higher than the differen-tial air pressure ∆psa + pressure loss ∆p + max gas pres-sure on burner + 5 mbar (2 WC)Adjusting range at low fire plusmn5 mbar (plusmn2 WC)

Technical data

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 48

VAHVRH

pd-

pu

psa-

psa

Connection of the air control pressure psaVAHE VRHE 3 x 18 compression fitting for 6 times 1 tube or VAHA VRHA 3 x NPT 18 adapter

9 4 VAVOutlet pressure pd 05 ndash 30 mbar (02 ndash 117 WC)Air control pressure psa 04 ndash 30 mbar (015 ndash 117 WC)Combustion chamber control pressure psc

-20 to +20 mbar (-78 to +78 WC)Min control pressure differential psa - psc 04 mbar (015 WC)Min pressure differential pd - psc 05 mbar (02 WC)Adjusting range at low fire plusmn15 mbar (plusmn06 WC)Transmission ratio of gas to air 061 to 31The inlet pressure pu must always be higher than the air control pressure psa times transmission ratio V + pressure loss ∆p + 15 mbar (06 WC)

pu

pd psapsc

VAV

VAVK 2 x plastic hose couplings (internal dia 39 mm (015) external dia 61 mm (024)) or VAVE 2 x 18 compression fitting for 6 times 1 tube or VAVA 2 x NPT 18 adapter

Technical data

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 49

9 5 Safety-specific characteristic values for VAx 1 ndash 3For SILSuitable for Safety Integrity Level SIL 1 2 3

Diagnostic coverage DC 0

Type of subsystem Type A to EN 61508-2 74312

Operating mode High demand mode pursu-ant to EN 61508-4 3512

For PLSuitable for Performance Level PL a b c d e

Category B 1 2 3 4Common cause failure CCF gt 65Application of essential safety requirements Satisfied

Application of tried-and-tested safety requirements Satisfied

For SIL and PL

B10d value

Operating cyclesVAD VAG VAV VAH 1 10094360VAD VAG VAV VAH 2 8229021VAD VAG VAV VAH 3 6363683

Hardware fault tolerance (1 valve) HFT 0

Hardware fault tolerance (2 valves) HFT 1

Safe failure fraction SFF gt 90Fraction of undetected com-mon cause failures β ge 2

Max service life under operating conditions10 years after date of production plus max 12 year in stor-age prior to first use or once the given number of operating cycles has been reached depending on which is achieved firstThe devices are suitable for single-channel systems (HFT = 0) up to SIL 2PL d and up to SIL 3PL e when two re-dundant valves are installed in a double-channel architecture (HFT = 1) provided that the complete system complies with the requirements of EN 61508ISO 13849

For a glossary of terms see page 53 (Glossary)

Technical data

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 50

nop 1hnop 1a

sB10d

T10d aPFHD (1 VAx) 1h

PFHD (2 VAx) 1h

PFDavg (1 VAx)

PFDavg (2 VAx)

Technical data gt Safety-specific characteristic values for VAx 1 ndash 3

9 5 1 Determining the PFHD value the λD value and the MTTFd value

PFHD = λD = x nop= 1MTTFd

01B10d

PFDavg = x λD x 24 x 365 x T10d 12

Type

Cycle time

suitable for

suitable for

PFHD = Probability of dangerous failure (HDM = high de-mand mode) [1hour]PFDavg = Average probability of dangerous failure on de-mand (LDM = low demand mode)λD = Mean dangerous failure rate [1hour]MTTFd = Mean time to dangerous failure [hours]nop = Demand rate (mean number of annual operations) [1hour]

9 5 2 Calculating the PFHD and PFDavg

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 51

VAD VAG VAH VAV

H1

Rp frac14(NPT frac14)

H2

E

LF

F

H4

H3

B

VAxS VAxF

L2G

G

Technical data

9 6 Dimensions

Type

Connec-tion Dimensions

WeightRpNPT DN

L L2 E F G H1 H2 H3 H4 Bmm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch kg lbs

VAx 115 12 15 75 29 ndash ndash 75 29 15 06 ndash ndash 143 56 82 32 161 63 117 46 97 38 18 40VAH 115 12 15 75 29 ndash ndash 75 29 15 06 ndash ndash 143 56 100 39 161 63 135 53 97 38 2 44VAx 120 34 20 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 82 33 161 63 117 46 97 38 19 42VAH 120 34 20 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 100 39 161 63 135 53 97 38 21 46VAx 125 1 25 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 82 33 161 63 117 46 97 38 19 42VAH 125 1 25 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 100 39 161 63 135 53 97 38 21 46VAx 240 112 40 128 50 200 79 85 33 29 11 66 26 170 67 112 44 191 75 162 64 125 49 44 97VAH 240 112 40 128 50 200 79 85 33 29 11 66 26 170 67 132 52 191 75 182 72 125 49 47 104VAx 350 2 50 155 61 230 91 85 33 36 14 74 29 180 70 135 53 201 79 196 77 160 63 61 134VAH 350 2 50 155 61 230 91 85 33 36 14 74 29 180 70 156 61 201 79 217 85 160 63 64 141

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 52

10 Converting unitssee wwwadlatusorg

11 Maintenance cyclesAt least once per annum at least twice per annum for biologi-cally produced methaneIf the flow rate drops clean the strainer

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 53

12 Glossary12 1 Diagnostic coverage DCMeasure of the effectiveness of diagnostics which may be determined as the ratio between the failure rate of detected dangerous failures and the failure rate of total dangerous failuresNOTE Diagnostic coverage can exist for the whole or parts of a safety-related system For example diagnostic cover-age could exist for sensors andor logic system andor final elements Unit see EN ISO 13849-12008

12 2 Mode of operationHigh demand mode or continuous modeOperating mode where the frequency of demands for opera-tion made on a safety-related system is greater than one per year or greater than twice the proof-test frequencysee EN 61508-42008

12 3 CategoryClassification of the safety-related parts of a control system in respect of their resistance to faults and their subsequent behaviour in the fault condition and which is achieved by the structural arrangement of the parts fault detection andor by their reliability see EN ISO 13849-12008

12 4 Common cause failure CCFFailures of different items resulting from a single event where these failures are not consequences of each othersee EN ISO 13849-12008

12 5 Fraction of undetected common cause failures β Fraction of undetected failures of redundant components due to a single event whereby these failures are not based on mutual causesNOTE β is expressed as a fraction in the equations and as a percentage elsewheresee EN 61508-62010

12 6 B10d valueMean number of cycles until 10 of the components fail dan-gerouslysee EN ISO 13849-12008

12 7 T10d valueMean time until 10 of the components fail dangerouslysee EN ISO 13849-12008

12 8 Hardware fault tolerance HFTA hardware fault tolerance of N means that N + 1 is the mini-mum number of faults that could cause a loss of the safety functionsee IEC 61508-22010

12 9 Mean dangerous failure rate λD Mean rate of dangerous failures during operation time (T10d) Unit 1hsee EN ISO 13849-12008

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 54

12 10 Safe failure fraction SFFFraction of safe failures related to all failures which are as-sumed to appearsee EN 13611A22011

12 11 Probability of dangerous failure PFHD Value describing the likelihood of dangerous failure per hour of a component for high demand mode or continuous mode Unit 1hsee EN 13611A22011

12 12 Mean time to dangerous failure MTTFd Expectation of the mean time to dangerous failuresee EN ISO 13849-12008

12 13 Demand rate nop Mean number of annual operationssee EN ISO 13849-12008

12 14 Average probability of dangerous failure on demand PFDavg (LDM = 1 ndash 10 switching cyclesyear)Average probability of a dangerous failure of the safety function on demand (LDM = low demand mode)see EN 61508-6

Glossary

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415

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Remarks

(Adobe Reader 7 or higher required) wwwadobecom

Elster GmbH Postfach 2809 middot 49018 Osnabruumlck Strotheweg 1 middot 49504 Lotte (Buumlren) GermanyT +49 541 1214-0 F +49 541 1214-370 infokromschroedercomwwwkromschroedercom

The current addresses of our international agents are available on the Internetwwwkromschroederdeindexphpid=718ampL=1

We reserve the right to make technical modifications in the interests of progressCopyright copy 2015 Elster GmbH All rights reserved

Contact

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0325

0530

  • Pressure regulators with solenoid valve VAD VAG VAV VAH
  • Flow rate regulator VRH
  • Pressure regulators with double solenoid valve VCD VCG VCV VCH
  • Contents
  • 1 Application
    • 11 Examples of application
      • 111 Constant pressure control
      • 112 Constant pressure control with two gas solenoid valves
      • 113 Constant pressure control with max pressure switch
      • 114 Constant pressure control with non-controlled pilot gas outlet
      • 115 Modulating control
      • 116 Modulating control with two gas solenoid valves
      • 117 Modulating control with two gas solenoid valves and inlet pressure switch
      • 118 HighLow control
      • 119 Zero pressure control
      • 1110 Staged flow rate control
      • 1111 Continuous or staged flow rate control
      • 1112 Modulating control with variable airgas ratio control with gas solenoid valve
      • 1113 Modulating control in residential heat generation
          • 2 Certification
          • 3 Function
            • 31 VAD VAG VAH VRH VAV
              • 311 Pressure regulator for gas VAD
              • 312 Airgas ratio control VAG
              • 313 Flow rate regulators VAH VRH
              • 314 Variable airgas ratio control VAV
              • 315 Pressure regulator with gas solenoid valve VAxS position indicator with visual indicator
                • 32 Animation
                • 33 Connection diagram
                  • 331 VAx with M20 cable gland
                  • 332 VAx with plug
                  • 333 VAS with VADVAGVAHVAV with M20 cable gland
                  • 334 VAS with VADVAGVAHVAV with plug
                      • 4 Replacement possibilities for MODULINE pressure regulators with gas solenoid valve
                        • 41 GVS GVI GVIB GVR and GVRH are to be replaced by VAD VAG VAG+VAS VAH and VAV
                          • 5 Flow rate
                            • 51 Selection example for VAD
                              • 511 Calculate VAD
                                • 52 Selection example for VAG VAH VRH VAV
                                  • 521 CalculateVAG VxHVAV
                                    • 53 Selection example for zero governor VAGN
                                      • 531 Calculate VAGN
                                          • 6 Selection
                                            • 61 Selection table for pressure regulator with solenoid valve VAD
                                            • 62 Type code for VAD
                                            • 63 Selection table for airgas ratio control with solenoid valve VAG flow rate regulators VAH VRH
                                            • 64 Type code for VAG VAH VRH
                                            • 65 Selection table for variable airgas ratio control with solenoid valve VAV
                                            • 66 Type code for VAV
                                            • 67 Accessories
                                              • 7 Project planning information
                                                • 71 Installation
                                                  • 711 Installation position
                                                    • 72 Setting the low-fire rate on VAG VAH VRH VAV
                                                    • 73 Setting the high-fire rate on VAV
                                                      • 731 Calculation
                                                          • 8 Accessories
                                                            • 81 Gas pressure switch DGVC for VAx VRH
                                                            • 82 Gas pressure switch DGVCT for VAxT VRHT
                                                            • 83 Bypass valvepilot gas valve VAS 1
                                                              • 831 VAS 1 attached to VADVAGVAHVAV 1
                                                              • 832 VAS 1 attached to VADVAGVAHVAV 2 VADVAGVAHVAV 3
                                                              • 833 Flow rate
                                                                • 84 Bypass valvepilot gas valve VBY 8 for VADVAGVAHVAV 1
                                                                  • 841 Scope of delivery VBY 8I as bypass valve
                                                                  • 842 Scope of delivery VBY 8R as pilot gas valve
                                                                  • 843 Selection
                                                                  • 844 Type code
                                                                  • 845 Flow rate
                                                                  • 846 Technical data
                                                                    • 85 Tightness control TC 116V
                                                                    • 86 Pressure test points
                                                                    • 87 Cable gland set
                                                                    • 88 Seal set VA 1thinspndashthinsp3
                                                                    • 89 Differential pressure orifice
                                                                    • 810 Retaining frame
                                                                    • 811 Attachment block
                                                                    • 812 Gas control line
                                                                    • 813 Measuring orifice VMO
                                                                    • 814 Filter module VMF
                                                                    • 815 Fine-adjusting valve VMV
                                                                      • 9 Technical data
                                                                        • 91 VAD
                                                                        • 92 VAG
                                                                        • 93 VAH VRH
                                                                        • 94 VAV
                                                                        • 95 Safety-specific characteristic values for VAx 1thinspndashthinsp3
                                                                          • 951 Determining the PFHD value the λD value and the MTTFd value
                                                                          • 952 Calculating the PFHD and PFDavg
                                                                            • 96 Dimensions
                                                                              • 10 Converting units
                                                                              • 11 Maintenance cycles
                                                                              • 12 Glossary
                                                                                • 121 Diagnostic coverage DC
                                                                                • 122 Mode of operation
                                                                                • 123 Category
                                                                                • 124 Common cause failure CCF
                                                                                • 125 Fraction of undetected common cause failures β
                                                                                • 126 B10d value
                                                                                • 127 T10d value
                                                                                • 128 Hardware fault tolerance HFT
                                                                                • 129 Mean dangerous failure rate λD
                                                                                • 1210 Safe failure fraction SFF
                                                                                • 1211 Probability of dangerous failure PFHD
                                                                                • 1212 Mean time to dangerous failure MTTFd
                                                                                • 1213 Demand rate nop
                                                                                • 1214 Average probability of dangerous failure on demand PFDavg
                                                                                  • Feedback
                                                                                  • Contact
                                                                                      1. naechste_Seite 24
                                                                                      2. naechste Seite 18
                                                                                      3. naechste Seite 6
                                                                                      4. naechste Seite 16
                                                                                      5. naechste Seite 14
                                                                                      6. naechste Seite 25
                                                                                      7. naechste_Seite 11
                                                                                      8. naechste_Seite 17
                                                                                      9. fbArbeitspunkt_Min Ja
                                                                                      10. fbArbeitspunkt Ja
                                                                                      11. ftProgramm Standard-Programm
                                                                                      12. fz_kv
                                                                                      13. fz_pe 80
                                                                                      14. fz_pG 60
                                                                                      15. fzDelta_p_Soll 20
                                                                                      16. ftEinheit_Druck mbar
                                                                                      17. fatTyp [115]
                                                                                      18. fbArbeitspunkt_Min_2 Ja
                                                                                      19. fbArbeitspunkt_2 Ja
                                                                                      20. ftRegler_Typ VAG
                                                                                      21. ftProgramm_2 Standard-Programm
                                                                                      22. fz_kv_2
                                                                                      23. fatMedium [08]
                                                                                      24. fzDichte 08
                                                                                      25. ftEinheit_Dichte kgm3
                                                                                      26. fzV_Norm 30
                                                                                      27. ftEinheit_Volstrom m3h
                                                                                      28. fz_pe_2 80
                                                                                      29. fz_pG_2 60
                                                                                      30. fzDelta_p_Soll_2 20
                                                                                      31. ftEinheit_Druck2 [mbar]
                                                                                      32. ftEinheit_Geschw [ms]
                                                                                      33. fatTyp_2 [10954451150103322]
                                                                                      34. fbArbeitspunkt_Min_3 Ja
                                                                                      35. fbArbeitspunkt_3 Ja
                                                                                      36. ftProgramm_3 Standard-Programm
                                                                                      37. fz_kv_3
                                                                                      38. fz_pe_3 20
                                                                                      39. fz_pG_3 0
                                                                                      40. fzDelta_p_Soll_3 20
                                                                                      41. fatTyp_3 [123]
                                                                                      42. fatSchaltleistung [6363683]
                                                                                      43. fz_nop_Stunde 1
                                                                                      44. fz_nop_Jahr 8760
                                                                                      45. fzZyklus 3600
                                                                                      46. fzB10d 6363683
                                                                                      47. fzT10d 10
                                                                                      48. fzPFHd_1V 15714170551864384e-8
                                                                                      49. fzPFDavg_1V
                                                                                      50. ftGeeignet_1V PL d SIL 2
                                                                                      51. fzPFHd_2V 33505832253532625e-10
                                                                                      52. fzPFDavg_2V
                                                                                      53. ftGeeignet_2V PL e SIL 3
                                                                                      54. ftUebersicht Off
                                                                                      55. ftVerstaendlichkeit Off
                                                                                      56. ftFehlende_Info
                                                                                      57. ftUmfang Off
                                                                                      58. ftVerwendung_1 Off
                                                                                      59. ftVerwendung_2 Off
                                                                                      60. ftVerwendung_3 Off
                                                                                      61. ftVerwendung_4 Off
                                                                                      62. ftNavigation Off
                                                                                      63. ftTaetigkeitsbereich Off
                                                                                      64. ftBemerkung
                                                                                      65. Michael Rehkamp Elster Kromschroumlder>btnSenden
Page 22: VAD, VAG, VAV, VAH, VRH, VCD, VCG, VCV, VCH · PDF fileVAD, VAG, VAH, VAV, VRH, VCD, VCG, VCV, VCH · Edition 04.15 6 VAD VAD VAS 1 .1 Examples of application 1 .1 .1 Constant pressure

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 22

4 Replacement possibilities for MODULINE pressure regulators with gas solenoid valve4 1 GVS GVI GVIB GVR and GVRH are to be replaced by VAD VAG VAG+VAS VAH and VAV

Type TypeGVS Pressure regulator with gas solenoid valve Pressure regulator with gas solenoid valve VADGVI Airgas ratio control with gas solenoid valve Airgas ratio control with gas solenoid valve VAG

GVIB Airgas ratio control with gas solenoid valve and bypass valve

Airgas ratio control with gas solenoid valve and bypass valve VAG+VAS

GVRH Flow rate regulator with gas solenoid valve Flow rate regulator with gas solenoid valve VAHGVR Variable airgas ratio control with gas solenoid valve Variable airgas ratio control with solenoid valve VAV115125 Flange 38 Size 115

Size 125 on request

115125 Flange frac12 Size 115

Size 125 Size 1 DN 15 115

115125 Flange frac34 Size 115

Size 125 Size 1 DN 20 120

115125 Flange 1 Size 115

Size 125 Size 1 DN 25 125

232240 Flange 1 Size 232

Size 240 on request

232240 Flange 1frac12 Size 232

Size 240 Size 2 DN 40 240

350 Flange 1frac12 Size 350 on request350 Flange 2 Size 350 Size 3 DN 50 350ML MODULINE + Rp internal thread connection fl anges Rp internal thread RTML MODULINE + NPT internal thread connection fl anges NPT internal thread N01 pu max 100 mbar (15 psig) pu max 500 mbar (7 psig) 02 200 mbar (3 psig) 500 mbar (7 psig)

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 23

Replacement possibilities for MODULINE pressure regulators with gas solenoid valve gt GVS GVI GVIB GVR and GVRH are to be replaced by VAD VAG VAG+VAS VAH and VAV

ContinuationType Type

Quick opening Quick opening NF1 Control ratio 11 Control ratio 11 K Mains voltage 24 V DC Mains voltage 24 V DC K

ndash 100 V AC PQ 120 V AC 120 V AC Q

ndash 200 V AC YT 220240 V AC 230 V AC W3 Electrical connection via terminals Electrical connection via terminals 6 Electrical connection via socket Electrical connection via socket 9 Metal terminal connection box Electrical connection via terminals S Position indicator Position indicator with visual indicator SG Position indicator for 24 V Position indicator for 24 V with visual indicator GM Suitable for biologically produced methane Suitable for biologically produced methane

Pressure test point at the inlet Pressure test point at the inlet and outlet Outlet pressure pd -25

Outlet pressure pd 25 ndash 25 mbar (1 ndash 10 WC)

2 ndash 90 mbar (08 ndash 36 WC) 20 ndash 50 mbar (8 ndash 20 WC) -5035 ndash 100 mbar (14 ndash 40 WC) -100Standard seat A

ExampleGVS 350ML01T3with Rp 2 connection flanges

ExampleVAD 350RNW-100A

with test points

= standard = available Pressure test points may be attached at the left- andor right-hand side Position indicator with visual indicator can be attached at the left- or right-hand side

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 24

∆p [i

nch

WC]

Qn [SCFH]100 400 600 4000 60001000 200020 30 40 50 200 3006015 80

1

08

1

2

3

4

56

8

10

20

30

40

5060

80

100

200

∆p [m

bar]

5

8

3

20

10

30

40

80

60

300

400

50

04 06 1 2 3 4 5 808 10 20 30 402

03 60 100 200

100

200

500

1

3

2

04 06 08 1 2 3 4 5 6 8 10 20 30 40

04 06 08 1 2 3 4 5 6 8 10

200

80 10020 3003

03Qn [m3h]

02

50 60 80 100

40 50 60

VAD

115

B

VAD

120

AVA

D 12

5A

P1P2

VAD

240

AVA

D 35

0A

= natural gas (ρ = 080 kgm3) = propane (ρ = 201 kgm3) = air (ρ = 129 kgm3)

The characteristic flow rate curves have been meas-ured with the specified flanges and a fitted strainer If two or more valves are combined the pressure loss of each additional valve drops by approx 5

metric imperial

Enter densityFlow rate Qn

Inlet pressure pu

Outlet pressure pd

Product RV v

Pressure loss ∆p

∆pmin

5 Flow rate5 1 Selection example for VADNatural gas Flow rate Qmax = 30 m3h Inlet pressure pu = 80 mbar Outlet pressure pd = 60 mbarThe desired control ratio from high-fire to low-fire rate is RV = 101High fire ∆p = pu - pd = 20 mbar Point P1Low fire Point P2 Qmin = 26 m3h at ∆p = 20 mbar RV = Qmax Qmin = 1151

Point P1 and point P2 must be within the working range of a unit size We recommend that you select the smallest size to achieve the best control properties

5 1 1 Calculate VAD

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 25

∆p [i

nch

WC]

Qn [SCFH]100 400 600 4000 60001000 200020 30 40 50 200 3006015 80

1

08

1

2

3

4

56

8

10

20

30

40

5060

80

100

200

∆p [m

bar]

5

8

3

20

10

30

40

80

60

300

400

50

04 06 1 2 3 4 5 808 10 20 30 402

03 60 100 200

100

200

500

1

3

2

04 06 08 1 2 3 4 5 6 8 10 20 30 40

04 06 08 1 2 3 4 5 6 8 10

200

80 10020 3003

03Qn [m3h]

02

50 60 80 100

40 50 60

= pd min lt 5 mbar

VAG

VxH

VAV

115

BVA

GV

xHV

AV 12

0A

VAG

VxH

VAV

125

A

P1

P2

VAG

VxH

VAV

240

AVA

GV

xHV

AV 3

50A

= natural gas (ρ = 080 kgm3) = propane (ρ = 201 kgm3) = air (ρ = 129 kgm3)

The characteristic flow rate curves have been meas-ured with the specified flanges and a fitted strainer If two or more valves are combined the pressure loss of each additional valve drops by approx 5

5 2 Selection example for VAG VAH VRH VAV Natural gas Flow rate Qmax = 30 m3h Inlet pressure pu = 80 mbar Outlet pressure pd max VAG = 60 mbarThe desired control ratio from high-fire to low-fire rate is RV = 101High fire ∆p = pu - pd max = 20 mbar Point P1Low fire pd min = pd max RV2 = 06 mbar Qmin = Qmax RV = 3 m3h ∆p = pu - pd min = 794 mbar Point P2 select VAG 120APoint P1 and point P2 must be within the working range of a unit size We recommend that you select the smallest size to achieve the best control properties

metric imperial

Enter densityFlow rate Qn

Inlet pressure pu

Outlet pressure pd

Product RV v

5 2 1 Calculate VAG VxH VAV

Pressure loss ∆p

∆pmin

Flow rate

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 26

∆p [i

nch

WC]

Qn [SCFH]100 400 600 4000 60001000 200020 30 40 50 200 3006015 80

1

08

1

2

3

4

56

8

10

20

30

40

5060

80

100

200

∆p [m

bar]

5

8

3

20

10

30

40

80

60

300

400

50

04 06 2 3 4 5 808 10 20 30 402

03 60 100 200

100

200

500

1

3

2

04 06 08 1 2 3 4 5 6 8 10 20 30 40

04 06 08 1 2 3 4 5 6 8 10

200

80 10020 3003

03Qn [m3h]

02

50 60 80 100

40 50 60

VAG

115

N

P1VAG

125

N

VAG

120

N

VAG

240

NP2

VAG

350

N

= natural gas (ρ = 080 kgm3) = propane (ρ = 201 kgm3) = air (ρ = 129 kgm3)

The characteristic flow rate curves have been meas-ured with the specified flanges and a fitted strainer If two or more valves are combined the pressure loss of each additional valve drops by approx 5

5 3 Selection example for zero governor VAG NNatural gas Flow rate Qmax = 30 m3h Inlet pressure pu = 20 mbar Outlet pressure pd = 0 mbar (atmospheric pressure)The desired control ratio from high-fire to low-fire rate is RV = 101High fire ∆p = pu - pd max = 20 mbar Point P1Low fire Point P2 Qmin = 24 m3h at ∆p = 20 mbar RV = Qmax Qmin = 1231Point P1 and point P2 must be within the working range of a unit size We recommend that you select the smallest size to achieve the best control properties

metric imperial

Enter densityFlow rate Qn

Inlet pressure pu

Outlet pressure pd

Product RV

5 3 1 Calculate VAG N

Pressure loss ∆p

∆pmin

Flow rate

v

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 27

6 Selection6 1 Selection table for pressure regulator with solenoid valve VAD

Accessories right Accessories left

Type1) T R N F N K P Q Y W S2) G2) R2) L2) M20

cab

le g

land

Plug

with

soc

ket

Plug

with

out s

ocke

t

-25-50 -100 A B Scre

w p

lug

Pres

sure

test

poi

nt

DG

17V

C 3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

Scre

w p

lug

Pres

sure

test

poi

nt

DG

17V

C 3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

VAD 115

VAD 120

VAD 125

VAD 240

VAD 350

= standard = available1) The following nominal inlet fl ange diameters are also available size 1 with nominal diameter DN 10 size 2 with nominal diameters DN 25 DN 32 and DN 50 size 3 with nominal diameters DN 40 and DN 652) Position indicator and bypasspilot gas valve cannot be fi tted together on the same side3) Specify the test point for inlet pressure pu or outlet pressure pdHelp for selecting the pressure regulator VAD can be found on the ProFi DVD wwwkromschroedercom Products DVD Product fi nder ldquoProFirdquo

Order exampleVAD 240RNW-100A

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 28

Selection

6 2 Type code for VADCode DescriptionVAD Pressure regulator with solenoid valve1 ndash 3 SizeT T-product10 ndash 65 Nominal inlet and outlet diameterRNF

Rp internal threadNPT internal thread

ISO fl angeN Quick opening quick closingKPQYW

Mains voltage 24 V DCMains voltage 100 V AC 5060 HzMains voltage 120 V AC 5060 HzMains voltage 200 V AC 5060 HzMains voltage 230 V AC 5060 Hz

SG

Position indicator with visual indicatorPosition indicator for 24 V with visual indicator

RL

Viewed from the right (in the direction of fl ow)Viewed from the left (in the direction of fl ow)

-25-50-100

Outlet pressure pd 25 ndash 25 mbar20 ndash 50 mbar

35 ndash 100 mbarAB

Standard valve seatReduced valve seat

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 29

Selection

6 3 Selection table for airgas ratio control with solenoid valve VAG flow rate regulators VAH VRH

Type1) T R N F N K P Q Y W S2) G2) R2) L2) M20

cab

le g

land

Plug

with

soc

ket

Plug

with

out s

ocke

t

A B E K A N Scre

w p

lug

Pres

sure

test

poi

ntD

G 1

7VC

3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

Scre

w p

lug

Pres

sure

test

poi

ntD

G 1

7VC

3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

VAG 115 VAG 120 VAG 125 VAG 240 VAG 350

VAH 115 VAH 120 VAH 125 VAH 240 VAH 350

VRH 115 VRH 120 VRH 125 VRH 240 VRH 350

= standard = available1) The following nominal inlet fl ange diameters are also available size 1 with nominal diameter DN 10 size 2 with nominal di-

ameters DN 25 DN 32 and DN 50 size 3 with nominal diameters DN 40 and DN 652) Position indicator and bypasspilot gas valve cannot be fi tted together on the same side3) Specify the test point for inlet pressure pu or outlet pressure pdHelp for selecting the regulators can be found on the ProFi DVD wwwkromschroedercom Products DVD Product fi nder ldquoProFirdquo

Order exampleVAG 240RNWAE

Accessories right Accessories left

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 30

Selection

6 4 Type code for VAG VAH VRHCode DescriptionVAGVAHVRH

Airgas ratio control with solenoid valveFlow rate regulator with solenoid valve

Flow rate regulator1 ndash 3 SizeT T-product15 ndash 50 Nominal inlet and outlet diameterRNF

Rp internal threadNPT internal thread

ISO fl angeN1) Quick opening quick closingK1)

P1)

Q1)

Y1)

W1)

Mains voltage 24 V DCMains voltage 100 V AC 5060 HzMains voltage 120 V AC 5060 HzMains voltage 200 V AC 5060 HzMains voltage 230 V AC 5060 Hz

S1)

G1)Position indicator with visual indicator

Position indicator for 24 V with visual indicatorRL

Viewed from the right (in the direction of fl ow)Viewed from the left (in the direction of fl ow)

AB

Standard valve seatReduced valve seat

EKAN

Connection kit for air control pressure psaVAG VAH VRH compression fi tting

VAG plastic hose couplingVAG VAH VRH NPT 18 adapter

VAG zero governor1) Only available for VAG VAV VAH

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 31

6 5 Selection table for variable airgas ratio control with solenoid valve VAVAccessories right Accessories left

Type1) T R N F N K P Q Y W S2) G2) R2) L2) M20

cab

le g

land

Plug

with

soc

ket

Plug

with

out s

ocke

t

A B E K A Scre

w p

lug

Pres

sure

test

poi

ntD

G 1

7VC

3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

Scre

w p

lug

Pres

sure

test

poi

ntD

G 1

7VC

3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

VAV 115

VAV 120

VAV 125

VAV 240

VAV 350

= standard = available1) The following nominal inlet fl ange diameters are also available size 1 with nominal diameter DN 10 size 2 with nominal diameters DN 25 DN 32 and DN 50 size 3 with nominal diameters DN 40 and DN 652) Position indicator and bypasspilot gas valve cannot be fi tted together on the same side3) Specify the test point for inlet pressure pu or outlet pressure pdHelp for selecting the variable airgas ratio control VAV can be found on the ProFi DVD wwwkromschroedercom

Products DVD Product fi nder ldquoProFirdquo

Order exampleVAV 240RNWAK

Selection

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 32

Selection

6 6 Type code for VAVCode DescriptionVAV Variable airgas ratio control with solenoid valve1 ndash 3 SizeT T-product15 ndash 50 Nominal inlet and outlet diameterRNF

Rp internal threadNPT internal thread

ISO fl angeN Quick opening quick closingKPQYW

Mains voltage 24 V DCMains voltage 100 V AC 5060 HzMains voltage 120 V AC 5060 HzMains voltage 200 V AC 5060 HzMains voltage 230 V AC 5060 Hz

SG

Position indicator with visual indicatorPosition indicator for 24 V with visual indicator

RL

Viewed from the right (in the direction of fl ow)Viewed from the left (in the direction of fl ow)

AB

Standard valve seatReduced valve seat

EKA

Connection kit for air control pressure psa and combus-tion chamber control pressure psc

compression fi ttingplastic hose coupling

NPT 18 adapter

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 33

Selection

6 7 AccessoriesModularly configurable withndash Screw plugsndash Pressure test pointsndash Pressure switch DGVC for inlet

andor outlet pressurendash Tightness control TCndash Bypasspilot gas valve VBY 8 for

size 1ndash Bypasspilot gas valve VAS 1For further information see page 37 (Accessories)

Position indicator

Plug with socket

Plug

Screwplugs

Pressuretest points

Pressure switch DGC Tightness

control TC

Bypasspilot gas valve VBY 8 for size 1

Bypasspilot gas valve VAS 1

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 34

7 Project planning informationDo not store or install the unit in the open airThe inlet pressure pu and the outlet pressure pd can be meas-ured on both sides of the valve body To increase the control accuracy an external impulse line can be connected instead of the pressure test point pd

VAD

pu

pd

(psa)

VAGpd

pu

psa

psa

VAD measurement point for the gas outlet pressure pd on the regulator body A combustion chamber control line (psc) can be connected to connection psa for maintaining a constant burner capacityVAG additional measurement point for the air control pressure psa on the regulator body

VAV

psapsc

pu

pd

VAH VRH

pu

pd-

pdpsa-

psa

VAV measurement point for the outlet pressure pd on the regulator bodyVAH additional measurement points for the outlet pressure pd- and the air control pressure psapsa- on the regulator body

7 1 Installation

GFK

VAGVAH

GFKVAD

Sealing material and thread cuttings must not be allowed to get into the valve housing Install a filter upstream of every system

gt20 mmgt0 79

The unit must not be in contact with masonry Minimum clear-ance 20 mm (079 inches)Ensure that there is sufficient space for installation and ad-justment

le +100 degCle +212 degF

The solenoid body heats up during operation ndash depending on ambient temperature (max 60degC140degF) and intrinsic heating (approx 40degC104degF)

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 35

In the case of double solenoid valves the position of the con-nection box can only be changed by removing the actuator and reinstalling it offset by 90deg or 180deg

If more than three valVario controls are installed in line the controls must be supported

The seals in some gas compression fittings are approved for temperatures of up to 70degC (158degF) This temperature limit will not be exceeded if the flow through the pipe is at least 1 msup3h (3531 SCFH) of gas and the maximum ambient temperature is 50degC (122degF)

7 1 1 Installation position

pu ge 80 mbar(80 hPa32 WC)

VAD VAG VAH VRH VAV

In humid environments black solenoid actuator in the vertical upright position only

VAD VAG VAH VRH black solenoid actuator in the vertical upright position or tilted up to the horizontal not upside downVAG VAH horizontal position only if pu ge 80 mbar (32 WC))VAV installation in the vertical position only black solenoid actuator in the vertical upright positionTo ensure that the airgas ratio control VAG the flow rate regulator VAH VRH or the variable airgas ratio control VAV can react quickly when the load is changed the impulse line for the air control pressure psa and for VAV the impulse line for the combustion chamber control pressure psc should be kept as short as possible The tube internal diameter for the impulse line must always be ge 39 mm (015)

VAH VRHIt is not permitted to install a gas solenoid valve VAS down-stream of flow rate regulator VAH VRH and upstream of fine-adjusting valve VMV The VAS would no longer be able to perform its function as a second safety valve if installed in the above-mentioned position

M

VMV

VAH

VASVAS

pd-

psa-psa

VMV

VAH pd-

psa-psa

The measuring orifice in the air line for impulse lines psa and psa- must always be installed downstream of the air control valve

Project planning information gt Installation

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 36

VAVThe impulse line for the combustion chamber control pres-sure psc must be fitted so that no condensation can enter the pressure regulator but rather flows back into the combustion chamber

7 2 Setting the low-fire rate on VAG VAH VRH VAV

-10 +05-05

ndash

+1

-15

mbar

+15

06

1 152

3

N V

+ +ndash

+30 -15+15

ndash

-3

+5

mbar

-5

N

+

VAG VAH VRH VAV

If the burner operates at low-fire rate the gasair mixture can be changed using the parallel shift of the characteristic curve by turning the adjusting screw ldquoNrdquoAdjusting range at low fire VAG VAH VRH -5 to +5 mbar (-195 to +195 WC) VAV -15 to +15 mbar (-06 to +06 WC)

7 3 Setting the high-fire rate on VAVTo set the high-fire rate the transmission ratio is changed us-ing the adjusting screw ldquoVrdquo until the required flue gas values are achievedTransmission ratio V = pdpsa = 061 to 31The settings N and V can influence each other and must be repeated if necessary

+N+V

-V

-N

VAV

psa [mbar]

p d [m

bar]

7 3 1 CalculationWith no connection to the combustion chamber control pres-sure psc pd = V times psa + NWith connection to the combustion chamber control pressure psc (pd - psc) = V times (psa - psc) + N

Project planning information

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 37

pu pd

21579

4836

085310

189

142

8 Accessories8 1 Gas pressure switch DG VC for VAx VRHType Adjusting range [mbar]DG 17VC 2 to 17DG 40VC 5 to 40DG 110VC 30 to 110DG 300VC 100 to 300

Scope of delivery 1 times pressure switch for gas 2 times retaining screws 2 times sealing rings

8 2 Gas pressure switch DG VCT for VAx T VRH TType Adjusting range [WC]DG 17VCT 08 to 68DG 40VCT 2 to 16DG 110VCT 12 to 44DG 300VCT 40 to 120

Scope of delivery 1 times gas pressure switch with AWG 18 connection wires 2 times retaining screws 2 times sealing ringsMonitoring the inlet pressure pu the electrical plug of the pressure switch for gas points towards the inlet flangeMonitoring the outlet pressure pd the electrical plug of the pressure switch for gas points towards the outlet flange

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 38

A BC

D

FE

ACD

F

B

E

8 3 Bypass valvepilot gas valve VAS 18 3 1 VAS 1 attached to VADVAGVAHVAV 1Scope of delivery A 1 times bypasspilot gas valve VAS 1 B 4 times O-rings C 4 times double nuts D 4 times connection parts E 1 times mounting aidBypass valve VAS 1 F 2 times connection pipes if the bypass valve has a blind flange

at the outlet sidePilot gas valve VAS 1 F 1 times connection pipe 1 times sealing plug if the pilot gas valve

has a threaded flange at the outlet side

Accessories

8 3 2 VAS 1 attached to VADVAGVAHVAV 2 VADVAGVAHVAV 3Scope of delivery A 1 times bypasspilot gas valve VAS 1 B 4 times O-rings C 4 times spacer sleeves D 4 times connection parts E 1 times mounting aidBypass valve VAS 1 F 2 times connection pipes if the bypass valve has a blind flange

at the outlet sidePilot gas valve VAS 1 F 1 times connection pipe 1 times sealing plug if the pilot gas valve

has a threaded flange at the outlet side

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 39

2

3

456

810

20

30

405060

80100

∆p [m

bar]

005 01 02 03 05 08 1 2 3 4 51

3

2

Qn [m3h]

1

01

02

03

0405

08

003

002

6 8 10

005 01 02 03 05 08 1 2 3 4 5003 6 8 10

20

005 01 02 03 05 08 1 2 3 4 5003 6 8 10 20

30

∆p [i

nch

WC]

1

2

3

456

810

20

30

40

04

004

006

00801

02

03

0506

08

Qn [SCFH]10 40 60 100 200 3001 500 10002 3 4 5

120 306 8

21 3 4 5 6 7 8 910

8 3 3 Flow rate

The characteristic flow rate curves have been measured for bypass valve VAS 1 with connection pipe diameter 1 to 10 mm (004 to 04) and for the pilot gas valve with 10 mm (04) connection pipe

Bypass valve connection pipe diameter [mm]

Pilo

t gas

val

ve 1

0 m

m (0

4)

conn

ectio

n pi

pe d

iam

eter

Accessories gt Bypass valvepilot gas valve VAS 1

= natural gas (ρ = 080 kgm3) = propane (ρ = 201 kgm3) = air (ρ = 129 kgm3)

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 40

Accessories

8 4 Bypass valvepilot gas valve VBY 8 for VADVAGVAHVAV 1

B

C

AVBY 8

VAx 1

55

(217)40(157)

70 (276)

80(315)

Rp frac14(pilot gas valve)

For mounting on VAD VAG VAH VAV 1 and double solenoid valve VCD VCG VCH VCV 1

8 4 1 Scope of delivery VBY 8I as bypass valveA 1 times bypass valve VBY 8IB 2 times retaining screws with 4 times O-rings both retaining screws

have a bypass orificeC 1 times grease for o-rings

8 4 2 Scope of delivery VBY 8R as pilot gas valveA 1 times pilot gas valve VBY 8RB 2 times retaining screws with 5 x O-rings one retaining screw

has a bypass orifice (2 x O-rings) the other does not (3 x O-rings)

C 1 times grease for O-rings

8 4 3 SelectionType I R W Q K 6L -R -L E B D 05

VBY 8

Order exampleVBY 8RW6L-LED

8 4 4 Type codeCode DescriptionVBY Gas solenoid valve8 Nominal sizeIR

For internal gas pick-up as bypass valveFor external gas pick-up as pilot gas valve

KQW

Mains voltage 24 V DC Mains voltage 120 V AC 5060 HzMains voltage 230 V AC 5060 Hz

6L Electrical connection via plug and socket with LED-R-L

Attachment side of main valve right-hand sideAttachment side of main valve left-hand side

EB

Attached to the VAxEnclosed (separate packing unit)

05D

Nozzle diameter = 05 mm (002)Flow adjustment

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 41

2

01

02

03

05

081

3

456

810

20

30

405060

80100

∆p [m

bar]

1

3

201 02 03 05 1 2 3001 003 4

Qn [m3h]

02 03 05 1 2

01 02 05

002 006

002

002 006 1

0010006 005 01

001

0003

0006 2 3

VBY 8DVBY 805

∆p [i

nch

WC]

1

2

3

456

810

20

30

40

040506

08

1

Qn [SCFH]10 40 60 1005 2081 2 30402

01

02

03

004005006

008

Adjusting range

8 4 5 Flow rateVBY 8 D

+

-

The flow rate can be set by turning the flow rate restrictor (4 mm016 Allen screw) frac14 of a turn Flow rate 10 to 100

VBY 8 05The flow is routed through a 05 mm (002) nozzle and thus has a fixed characteristic flow rate curve Adjustment is not possible

8 4 6 Technical dataInlet pressure pu max 500 mbar (7 psig)Ambient temperature 0 to +60degC (32 to 140degF) no condensation permittedStorage temperature 0 to +40degC (32 to 104degF) no condensation permittedPower consumption 24 V = 8 W 120 V = 8 W 230 V = 95 WEnclosure IP 54

Accessories gt Bypass valvepilot gas valve VBY 8 for VADVAGVAHVAV 1

= natural gas (ρ = 080 kgm3) = propane (ρ = 201 kgm3) = air (ρ = 129 kgm3)

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 42

TC 116VB C

56(22)

49(193)

27(106)

A

A

VCx 1 VCx 2VCx 3

8 5 Tightness control TC 116Vfor VAx 1 ndash 3An adapter plate is required to attach the tightness control to the right- or left-hand side of the pressure regulator with gas solenoid valveScope of delivery A 1 times adapter plate B 2 times O-rings C 2 times retaining screwsFor attachment to left-hand side Order No 74922391 right-hand side Order No 74921995

8 6 Pressure test pointsTest points to check the inlet pressure pu and outlet pressure pdScope of delivery 1 x pressure test points with 1 x profiled sealing rings Order No 74923390

8 7 Cable gland setWhen wiring a double solenoid valve with pressure regula-tor VCx the connection boxes are to be connected using a cable gland setThe cable gland set can only be used if the connection boxes are at the same height and on the same side and if both valves are equipped either with or without a proof of closure switchVA 1 Order No 74921985 VA 2 Order No 74921986 VA 3 Order No 74921987

Accessories

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 43

A B

D

C

Accessories

8 9 Differential pressure orifice

Size PipeDN

Differential pressure orifi cewith outlet dia

1 15 17 mm 0671 20 25 mm 0981 25 30 mm 1182 40 46 mm 1813 50 58 mm 228

If pressure regulator VADVAGVAV 1 is retrofitted upstream of gas solenoid valve VAS 1 a DN 25 differential pressure orifice with outlet opening d = 30 mm (118) must be inserted at the outlet of the pressure regulatorIn the case of pressure regulator VAx 115 or VAx 120 the DN 25 differential pressure orifice must be ordered separately and retrofitted Order No 74922240

8 8 Seal set VA 1 ndash 3VA 1 Order No 74921988 VA 2 Order No 74921989 VA 3 Order No 74921990Scope of deliveryA 1 times double block seal B 2 times O-rings (flange) C 2 times O-rings (pressure switch) for pressure test pointscrew plug D 2 times sealing rings (flat sealing) and 2 times profiled sealing rings

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 44

BA

C

pd-

8 11 Attachment blockFor locked installation of pressure gauge and other acces-soriesScope of delivery A 1 times attachment block B 2 times self-tapping screws for installation C 2 times O-rings

Accessories

8 10 Retaining frameIn the event that a pressure regulator VAx is installed at a later point upstream of a gas solenoid valve VAS a measur-ing orifice VMO or a fine-adjusting valve VMV the retaining frame must be fitted at the inlet of the second device in order to fasten the differential pressure orifice at the regulator outlet Order the retaining frame separatelyRetaining frame for Size 1 Order No 74923029 Size 2 Order No 74923030 Size 3 Order No 74923031

8 12 Gas control lineFine-adjusting valve VMV can be installed on the flow rate regulator VAH for fine adjustment of the gas flow rateThe gas control line for gas outlet pressure pd- is available with 2 18 compression fittingsSize 1 Order No 74924458 Size 2 Order No 74924459

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 45

8 13 Measuring orifice VMOThe measuring orifice VMO is designed to reduce the gas and air flow rates and is installed downstream of the valVario control The measuring orifice is available with Rp internal thread (NPT internal thread) or flange to ISO 7005See wwwdocuthekcom Elster Kromschroumlder Krom-schroumlder LBE Products 03 Valves and butterfly valves valVario accessories Type of document Technical Informa-tion VMO

Accessories

8 14 Filter module VMFUsing the filter module VMF the gas flow upstream of the gas solenoid valve VAS and the airgas ratio control is cleaned The filter module is available with Rp internal thread (NPT internal thread) or flange to ISO 7005 and can also be supplied with fitted pressure switch as an optionSee wwwdocuthekcom Elster Kromschroumlder Krom-schroumlder LBE Products 03 Valves and butterfly valves valVario accessories Type of document Technical Informa-tion VMF

8 15 Fine-adjusting valve VMVThe flow rate is set using the fine-adjusting valve VMV The fine-adjusting valve is available with Rp internal thread (NPT internal thread) or flange to ISO 7005See wwwdocuthekcom Elster Kromschroumlder Krom-schroumlder LBE Products 03 Valves and butterfly valves valVario accessories Type of document Technical Infor-mation VMV

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 46

9 Technical dataGas types natural gas LPG (gaseous) biologically produced methane (max 01 -by-vol H2S) or clean air other gases on request The gas must be clean and dry in all temperature conditions and must not contain condensateCE and FM approved UL listed max inlet pressure pu 10 ndash 500 mbar (4 ndash 200 WC) FM approved (230 V AC 120 V AC 24 V DC) non opera-tional pressure 700 mbar (10 psig)ANSICSA approved (230 V AC 120 V AC 24 V DC) up to 350 mbar (5 psig)Opening time of the solenoid valve quick opening le 05 s Closing time quick closing lt 1 sMedium and ambient temperatures -20 to +60degC (-4 to +140degF) no condensation permittedStorage temperature -20 to +40degC (-4 to +104degF)Enclosure IP 65Valve housing aluminium valve seal NBRConnection flanges with internal thread Rp to ISO 7-1 NPT to ANSIASMESafety valve Class A to EN 161 Factory Mutual Research Class 7400 Process Control Valves (230 V AC 120 V AC 24 V DC) ANSI Z2121 and CSA 65 ANSI Z2118 and CSA 63Control class A to EN 88-1Control range up to 101

Mains voltage 230 V AC +10-15 5060 Hz 200 V AC +10-15 5060 Hz 120 V AC +10-15 5060 Hz 100 V AC +10-15 5060 Hz 24 V DC plusmn20Duty cycle 100Power factor of the solenoid coil cos φ = 09Power consumption

Type Voltage Power

VAx 1

24 V DC 25 W ndash100 V AC 25 W (26 VA)120 V AC 25 W (26 VA)200 V AC 25 W (26 VA)230 V AC 25 W (26 VA)

VAx 2 VAx 3

24 V DC 36 W ndash100 V AC 36 W (40 VA)120 V AC 40 W (44 VA)200 V AC 40 W (44 VA)230 V AC 40 W (44 VA)

VBY24 V DC 8 W ndash

120 V AC 8 W ndash230 V AC 95 W ndash

Cable gland M20 times 15Electrical connection cable with max 25 mm2 (AWG 12) or plug with socket to EN 175301-803

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 47

Position indicator contact rating

Type Voltage Min current(resistive load)

Max current(resistive load)

VAxS VCxS 12 ndash 250 V AC 5060 Hz 100 mA 3 AVAxG VCxG 12 ndash 30 V DC 2 mA 01 A

Position indicator switching frequency max 5 times per minute

Switching current [A]

Switching cyclescos φ = 1 cos φ = 06

01 500000 50000005 300000 250000

1 200000 1000003 100000 ndash

Limited to max 200000 cycles for heating systems

9 1 VADOutlet pressure pd VAD-25 25 ndash 25 mbar (1 ndash 10 WC) VAD-50 20 ndash 50 mbar (8 ndash 20 WC) VAD-100 35 ndash 100 mbar (14 ndash 40 WC)Combustion chamber control pressure psc (connection psa)

-20 to +20 mbar (-78 to +78 WC)

VAD

pu

pd

(psa)

9 2 VAGOutlet pressure pd 05 ndash 100 mbar (02 ndash 40 WC)Air control pressure psa 05 ndash 100 mbar (02 ndash 40 WC)

Adjusting range at low fire plusmn5 mbar (plusmn2 WC)Transmission ratio of gas to air 11The inlet pressure must always be higher than the air control pressure psa + pressure loss ∆p + 5 mbar (2 WC)

VAGpd

pu

psa

psa

VAGK 1 x 18 coupling for plastic hose (internal dia 39 mm (015) external dia 61 mm (024)) or VAGE 1 x 18 compression fitting for 6 times 1 tube or VAGA 1 x NPT 18 adapter or VAGN zero governor with breathing orifice

9 3 VAH VRHAir control pressure psa 06 ndash 100 mbar (024 ndash 40 WC) Differential air pressure ∆psa (psa - psa-) 06 ndash 50 mbar (024 ndash 197 WC) Differential gas pressure ∆pd (pd - pd-) 06 ndash 50 mbar (024 ndash 197 WC)Transmission ratio of gas to air 11The inlet pressure must always be higher than the differen-tial air pressure ∆psa + pressure loss ∆p + max gas pres-sure on burner + 5 mbar (2 WC)Adjusting range at low fire plusmn5 mbar (plusmn2 WC)

Technical data

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 48

VAHVRH

pd-

pu

psa-

psa

Connection of the air control pressure psaVAHE VRHE 3 x 18 compression fitting for 6 times 1 tube or VAHA VRHA 3 x NPT 18 adapter

9 4 VAVOutlet pressure pd 05 ndash 30 mbar (02 ndash 117 WC)Air control pressure psa 04 ndash 30 mbar (015 ndash 117 WC)Combustion chamber control pressure psc

-20 to +20 mbar (-78 to +78 WC)Min control pressure differential psa - psc 04 mbar (015 WC)Min pressure differential pd - psc 05 mbar (02 WC)Adjusting range at low fire plusmn15 mbar (plusmn06 WC)Transmission ratio of gas to air 061 to 31The inlet pressure pu must always be higher than the air control pressure psa times transmission ratio V + pressure loss ∆p + 15 mbar (06 WC)

pu

pd psapsc

VAV

VAVK 2 x plastic hose couplings (internal dia 39 mm (015) external dia 61 mm (024)) or VAVE 2 x 18 compression fitting for 6 times 1 tube or VAVA 2 x NPT 18 adapter

Technical data

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 49

9 5 Safety-specific characteristic values for VAx 1 ndash 3For SILSuitable for Safety Integrity Level SIL 1 2 3

Diagnostic coverage DC 0

Type of subsystem Type A to EN 61508-2 74312

Operating mode High demand mode pursu-ant to EN 61508-4 3512

For PLSuitable for Performance Level PL a b c d e

Category B 1 2 3 4Common cause failure CCF gt 65Application of essential safety requirements Satisfied

Application of tried-and-tested safety requirements Satisfied

For SIL and PL

B10d value

Operating cyclesVAD VAG VAV VAH 1 10094360VAD VAG VAV VAH 2 8229021VAD VAG VAV VAH 3 6363683

Hardware fault tolerance (1 valve) HFT 0

Hardware fault tolerance (2 valves) HFT 1

Safe failure fraction SFF gt 90Fraction of undetected com-mon cause failures β ge 2

Max service life under operating conditions10 years after date of production plus max 12 year in stor-age prior to first use or once the given number of operating cycles has been reached depending on which is achieved firstThe devices are suitable for single-channel systems (HFT = 0) up to SIL 2PL d and up to SIL 3PL e when two re-dundant valves are installed in a double-channel architecture (HFT = 1) provided that the complete system complies with the requirements of EN 61508ISO 13849

For a glossary of terms see page 53 (Glossary)

Technical data

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 50

nop 1hnop 1a

sB10d

T10d aPFHD (1 VAx) 1h

PFHD (2 VAx) 1h

PFDavg (1 VAx)

PFDavg (2 VAx)

Technical data gt Safety-specific characteristic values for VAx 1 ndash 3

9 5 1 Determining the PFHD value the λD value and the MTTFd value

PFHD = λD = x nop= 1MTTFd

01B10d

PFDavg = x λD x 24 x 365 x T10d 12

Type

Cycle time

suitable for

suitable for

PFHD = Probability of dangerous failure (HDM = high de-mand mode) [1hour]PFDavg = Average probability of dangerous failure on de-mand (LDM = low demand mode)λD = Mean dangerous failure rate [1hour]MTTFd = Mean time to dangerous failure [hours]nop = Demand rate (mean number of annual operations) [1hour]

9 5 2 Calculating the PFHD and PFDavg

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 51

VAD VAG VAH VAV

H1

Rp frac14(NPT frac14)

H2

E

LF

F

H4

H3

B

VAxS VAxF

L2G

G

Technical data

9 6 Dimensions

Type

Connec-tion Dimensions

WeightRpNPT DN

L L2 E F G H1 H2 H3 H4 Bmm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch kg lbs

VAx 115 12 15 75 29 ndash ndash 75 29 15 06 ndash ndash 143 56 82 32 161 63 117 46 97 38 18 40VAH 115 12 15 75 29 ndash ndash 75 29 15 06 ndash ndash 143 56 100 39 161 63 135 53 97 38 2 44VAx 120 34 20 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 82 33 161 63 117 46 97 38 19 42VAH 120 34 20 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 100 39 161 63 135 53 97 38 21 46VAx 125 1 25 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 82 33 161 63 117 46 97 38 19 42VAH 125 1 25 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 100 39 161 63 135 53 97 38 21 46VAx 240 112 40 128 50 200 79 85 33 29 11 66 26 170 67 112 44 191 75 162 64 125 49 44 97VAH 240 112 40 128 50 200 79 85 33 29 11 66 26 170 67 132 52 191 75 182 72 125 49 47 104VAx 350 2 50 155 61 230 91 85 33 36 14 74 29 180 70 135 53 201 79 196 77 160 63 61 134VAH 350 2 50 155 61 230 91 85 33 36 14 74 29 180 70 156 61 201 79 217 85 160 63 64 141

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 52

10 Converting unitssee wwwadlatusorg

11 Maintenance cyclesAt least once per annum at least twice per annum for biologi-cally produced methaneIf the flow rate drops clean the strainer

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 53

12 Glossary12 1 Diagnostic coverage DCMeasure of the effectiveness of diagnostics which may be determined as the ratio between the failure rate of detected dangerous failures and the failure rate of total dangerous failuresNOTE Diagnostic coverage can exist for the whole or parts of a safety-related system For example diagnostic cover-age could exist for sensors andor logic system andor final elements Unit see EN ISO 13849-12008

12 2 Mode of operationHigh demand mode or continuous modeOperating mode where the frequency of demands for opera-tion made on a safety-related system is greater than one per year or greater than twice the proof-test frequencysee EN 61508-42008

12 3 CategoryClassification of the safety-related parts of a control system in respect of their resistance to faults and their subsequent behaviour in the fault condition and which is achieved by the structural arrangement of the parts fault detection andor by their reliability see EN ISO 13849-12008

12 4 Common cause failure CCFFailures of different items resulting from a single event where these failures are not consequences of each othersee EN ISO 13849-12008

12 5 Fraction of undetected common cause failures β Fraction of undetected failures of redundant components due to a single event whereby these failures are not based on mutual causesNOTE β is expressed as a fraction in the equations and as a percentage elsewheresee EN 61508-62010

12 6 B10d valueMean number of cycles until 10 of the components fail dan-gerouslysee EN ISO 13849-12008

12 7 T10d valueMean time until 10 of the components fail dangerouslysee EN ISO 13849-12008

12 8 Hardware fault tolerance HFTA hardware fault tolerance of N means that N + 1 is the mini-mum number of faults that could cause a loss of the safety functionsee IEC 61508-22010

12 9 Mean dangerous failure rate λD Mean rate of dangerous failures during operation time (T10d) Unit 1hsee EN ISO 13849-12008

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 54

12 10 Safe failure fraction SFFFraction of safe failures related to all failures which are as-sumed to appearsee EN 13611A22011

12 11 Probability of dangerous failure PFHD Value describing the likelihood of dangerous failure per hour of a component for high demand mode or continuous mode Unit 1hsee EN 13611A22011

12 12 Mean time to dangerous failure MTTFd Expectation of the mean time to dangerous failuresee EN ISO 13849-12008

12 13 Demand rate nop Mean number of annual operationssee EN ISO 13849-12008

12 14 Average probability of dangerous failure on demand PFDavg (LDM = 1 ndash 10 switching cyclesyear)Average probability of a dangerous failure of the safety function on demand (LDM = low demand mode)see EN 61508-6

Glossary

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415

Finally we are offering you the opportunity to assess this ldquoTechnical Information (TI)rdquo and to give us your opinion so that we can improve our documents further and suit them to your needs

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Remarks

(Adobe Reader 7 or higher required) wwwadobecom

Elster GmbH Postfach 2809 middot 49018 Osnabruumlck Strotheweg 1 middot 49504 Lotte (Buumlren) GermanyT +49 541 1214-0 F +49 541 1214-370 infokromschroedercomwwwkromschroedercom

The current addresses of our international agents are available on the Internetwwwkromschroederdeindexphpid=718ampL=1

We reserve the right to make technical modifications in the interests of progressCopyright copy 2015 Elster GmbH All rights reserved

Contact

Feedback

0325

0530

  • Pressure regulators with solenoid valve VAD VAG VAV VAH
  • Flow rate regulator VRH
  • Pressure regulators with double solenoid valve VCD VCG VCV VCH
  • Contents
  • 1 Application
    • 11 Examples of application
      • 111 Constant pressure control
      • 112 Constant pressure control with two gas solenoid valves
      • 113 Constant pressure control with max pressure switch
      • 114 Constant pressure control with non-controlled pilot gas outlet
      • 115 Modulating control
      • 116 Modulating control with two gas solenoid valves
      • 117 Modulating control with two gas solenoid valves and inlet pressure switch
      • 118 HighLow control
      • 119 Zero pressure control
      • 1110 Staged flow rate control
      • 1111 Continuous or staged flow rate control
      • 1112 Modulating control with variable airgas ratio control with gas solenoid valve
      • 1113 Modulating control in residential heat generation
          • 2 Certification
          • 3 Function
            • 31 VAD VAG VAH VRH VAV
              • 311 Pressure regulator for gas VAD
              • 312 Airgas ratio control VAG
              • 313 Flow rate regulators VAH VRH
              • 314 Variable airgas ratio control VAV
              • 315 Pressure regulator with gas solenoid valve VAxS position indicator with visual indicator
                • 32 Animation
                • 33 Connection diagram
                  • 331 VAx with M20 cable gland
                  • 332 VAx with plug
                  • 333 VAS with VADVAGVAHVAV with M20 cable gland
                  • 334 VAS with VADVAGVAHVAV with plug
                      • 4 Replacement possibilities for MODULINE pressure regulators with gas solenoid valve
                        • 41 GVS GVI GVIB GVR and GVRH are to be replaced by VAD VAG VAG+VAS VAH and VAV
                          • 5 Flow rate
                            • 51 Selection example for VAD
                              • 511 Calculate VAD
                                • 52 Selection example for VAG VAH VRH VAV
                                  • 521 CalculateVAG VxHVAV
                                    • 53 Selection example for zero governor VAGN
                                      • 531 Calculate VAGN
                                          • 6 Selection
                                            • 61 Selection table for pressure regulator with solenoid valve VAD
                                            • 62 Type code for VAD
                                            • 63 Selection table for airgas ratio control with solenoid valve VAG flow rate regulators VAH VRH
                                            • 64 Type code for VAG VAH VRH
                                            • 65 Selection table for variable airgas ratio control with solenoid valve VAV
                                            • 66 Type code for VAV
                                            • 67 Accessories
                                              • 7 Project planning information
                                                • 71 Installation
                                                  • 711 Installation position
                                                    • 72 Setting the low-fire rate on VAG VAH VRH VAV
                                                    • 73 Setting the high-fire rate on VAV
                                                      • 731 Calculation
                                                          • 8 Accessories
                                                            • 81 Gas pressure switch DGVC for VAx VRH
                                                            • 82 Gas pressure switch DGVCT for VAxT VRHT
                                                            • 83 Bypass valvepilot gas valve VAS 1
                                                              • 831 VAS 1 attached to VADVAGVAHVAV 1
                                                              • 832 VAS 1 attached to VADVAGVAHVAV 2 VADVAGVAHVAV 3
                                                              • 833 Flow rate
                                                                • 84 Bypass valvepilot gas valve VBY 8 for VADVAGVAHVAV 1
                                                                  • 841 Scope of delivery VBY 8I as bypass valve
                                                                  • 842 Scope of delivery VBY 8R as pilot gas valve
                                                                  • 843 Selection
                                                                  • 844 Type code
                                                                  • 845 Flow rate
                                                                  • 846 Technical data
                                                                    • 85 Tightness control TC 116V
                                                                    • 86 Pressure test points
                                                                    • 87 Cable gland set
                                                                    • 88 Seal set VA 1thinspndashthinsp3
                                                                    • 89 Differential pressure orifice
                                                                    • 810 Retaining frame
                                                                    • 811 Attachment block
                                                                    • 812 Gas control line
                                                                    • 813 Measuring orifice VMO
                                                                    • 814 Filter module VMF
                                                                    • 815 Fine-adjusting valve VMV
                                                                      • 9 Technical data
                                                                        • 91 VAD
                                                                        • 92 VAG
                                                                        • 93 VAH VRH
                                                                        • 94 VAV
                                                                        • 95 Safety-specific characteristic values for VAx 1thinspndashthinsp3
                                                                          • 951 Determining the PFHD value the λD value and the MTTFd value
                                                                          • 952 Calculating the PFHD and PFDavg
                                                                            • 96 Dimensions
                                                                              • 10 Converting units
                                                                              • 11 Maintenance cycles
                                                                              • 12 Glossary
                                                                                • 121 Diagnostic coverage DC
                                                                                • 122 Mode of operation
                                                                                • 123 Category
                                                                                • 124 Common cause failure CCF
                                                                                • 125 Fraction of undetected common cause failures β
                                                                                • 126 B10d value
                                                                                • 127 T10d value
                                                                                • 128 Hardware fault tolerance HFT
                                                                                • 129 Mean dangerous failure rate λD
                                                                                • 1210 Safe failure fraction SFF
                                                                                • 1211 Probability of dangerous failure PFHD
                                                                                • 1212 Mean time to dangerous failure MTTFd
                                                                                • 1213 Demand rate nop
                                                                                • 1214 Average probability of dangerous failure on demand PFDavg
                                                                                  • Feedback
                                                                                  • Contact
                                                                                      1. naechste_Seite 24
                                                                                      2. naechste Seite 18
                                                                                      3. naechste Seite 6
                                                                                      4. naechste Seite 16
                                                                                      5. naechste Seite 14
                                                                                      6. naechste Seite 25
                                                                                      7. naechste_Seite 11
                                                                                      8. naechste_Seite 17
                                                                                      9. fbArbeitspunkt_Min Ja
                                                                                      10. fbArbeitspunkt Ja
                                                                                      11. ftProgramm Standard-Programm
                                                                                      12. fz_kv
                                                                                      13. fz_pe 80
                                                                                      14. fz_pG 60
                                                                                      15. fzDelta_p_Soll 20
                                                                                      16. ftEinheit_Druck mbar
                                                                                      17. fatTyp [115]
                                                                                      18. fbArbeitspunkt_Min_2 Ja
                                                                                      19. fbArbeitspunkt_2 Ja
                                                                                      20. ftRegler_Typ VAG
                                                                                      21. ftProgramm_2 Standard-Programm
                                                                                      22. fz_kv_2
                                                                                      23. fatMedium [08]
                                                                                      24. fzDichte 08
                                                                                      25. ftEinheit_Dichte kgm3
                                                                                      26. fzV_Norm 30
                                                                                      27. ftEinheit_Volstrom m3h
                                                                                      28. fz_pe_2 80
                                                                                      29. fz_pG_2 60
                                                                                      30. fzDelta_p_Soll_2 20
                                                                                      31. ftEinheit_Druck2 [mbar]
                                                                                      32. ftEinheit_Geschw [ms]
                                                                                      33. fatTyp_2 [10954451150103322]
                                                                                      34. fbArbeitspunkt_Min_3 Ja
                                                                                      35. fbArbeitspunkt_3 Ja
                                                                                      36. ftProgramm_3 Standard-Programm
                                                                                      37. fz_kv_3
                                                                                      38. fz_pe_3 20
                                                                                      39. fz_pG_3 0
                                                                                      40. fzDelta_p_Soll_3 20
                                                                                      41. fatTyp_3 [123]
                                                                                      42. fatSchaltleistung [6363683]
                                                                                      43. fz_nop_Stunde 1
                                                                                      44. fz_nop_Jahr 8760
                                                                                      45. fzZyklus 3600
                                                                                      46. fzB10d 6363683
                                                                                      47. fzT10d 10
                                                                                      48. fzPFHd_1V 15714170551864384e-8
                                                                                      49. fzPFDavg_1V
                                                                                      50. ftGeeignet_1V PL d SIL 2
                                                                                      51. fzPFHd_2V 33505832253532625e-10
                                                                                      52. fzPFDavg_2V
                                                                                      53. ftGeeignet_2V PL e SIL 3
                                                                                      54. ftUebersicht Off
                                                                                      55. ftVerstaendlichkeit Off
                                                                                      56. ftFehlende_Info
                                                                                      57. ftUmfang Off
                                                                                      58. ftVerwendung_1 Off
                                                                                      59. ftVerwendung_2 Off
                                                                                      60. ftVerwendung_3 Off
                                                                                      61. ftVerwendung_4 Off
                                                                                      62. ftNavigation Off
                                                                                      63. ftTaetigkeitsbereich Off
                                                                                      64. ftBemerkung
                                                                                      65. Michael Rehkamp Elster Kromschroumlder>btnSenden
Page 23: VAD, VAG, VAV, VAH, VRH, VCD, VCG, VCV, VCH · PDF fileVAD, VAG, VAH, VAV, VRH, VCD, VCG, VCV, VCH · Edition 04.15 6 VAD VAD VAS 1 .1 Examples of application 1 .1 .1 Constant pressure

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 23

Replacement possibilities for MODULINE pressure regulators with gas solenoid valve gt GVS GVI GVIB GVR and GVRH are to be replaced by VAD VAG VAG+VAS VAH and VAV

ContinuationType Type

Quick opening Quick opening NF1 Control ratio 11 Control ratio 11 K Mains voltage 24 V DC Mains voltage 24 V DC K

ndash 100 V AC PQ 120 V AC 120 V AC Q

ndash 200 V AC YT 220240 V AC 230 V AC W3 Electrical connection via terminals Electrical connection via terminals 6 Electrical connection via socket Electrical connection via socket 9 Metal terminal connection box Electrical connection via terminals S Position indicator Position indicator with visual indicator SG Position indicator for 24 V Position indicator for 24 V with visual indicator GM Suitable for biologically produced methane Suitable for biologically produced methane

Pressure test point at the inlet Pressure test point at the inlet and outlet Outlet pressure pd -25

Outlet pressure pd 25 ndash 25 mbar (1 ndash 10 WC)

2 ndash 90 mbar (08 ndash 36 WC) 20 ndash 50 mbar (8 ndash 20 WC) -5035 ndash 100 mbar (14 ndash 40 WC) -100Standard seat A

ExampleGVS 350ML01T3with Rp 2 connection flanges

ExampleVAD 350RNW-100A

with test points

= standard = available Pressure test points may be attached at the left- andor right-hand side Position indicator with visual indicator can be attached at the left- or right-hand side

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 24

∆p [i

nch

WC]

Qn [SCFH]100 400 600 4000 60001000 200020 30 40 50 200 3006015 80

1

08

1

2

3

4

56

8

10

20

30

40

5060

80

100

200

∆p [m

bar]

5

8

3

20

10

30

40

80

60

300

400

50

04 06 1 2 3 4 5 808 10 20 30 402

03 60 100 200

100

200

500

1

3

2

04 06 08 1 2 3 4 5 6 8 10 20 30 40

04 06 08 1 2 3 4 5 6 8 10

200

80 10020 3003

03Qn [m3h]

02

50 60 80 100

40 50 60

VAD

115

B

VAD

120

AVA

D 12

5A

P1P2

VAD

240

AVA

D 35

0A

= natural gas (ρ = 080 kgm3) = propane (ρ = 201 kgm3) = air (ρ = 129 kgm3)

The characteristic flow rate curves have been meas-ured with the specified flanges and a fitted strainer If two or more valves are combined the pressure loss of each additional valve drops by approx 5

metric imperial

Enter densityFlow rate Qn

Inlet pressure pu

Outlet pressure pd

Product RV v

Pressure loss ∆p

∆pmin

5 Flow rate5 1 Selection example for VADNatural gas Flow rate Qmax = 30 m3h Inlet pressure pu = 80 mbar Outlet pressure pd = 60 mbarThe desired control ratio from high-fire to low-fire rate is RV = 101High fire ∆p = pu - pd = 20 mbar Point P1Low fire Point P2 Qmin = 26 m3h at ∆p = 20 mbar RV = Qmax Qmin = 1151

Point P1 and point P2 must be within the working range of a unit size We recommend that you select the smallest size to achieve the best control properties

5 1 1 Calculate VAD

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 25

∆p [i

nch

WC]

Qn [SCFH]100 400 600 4000 60001000 200020 30 40 50 200 3006015 80

1

08

1

2

3

4

56

8

10

20

30

40

5060

80

100

200

∆p [m

bar]

5

8

3

20

10

30

40

80

60

300

400

50

04 06 1 2 3 4 5 808 10 20 30 402

03 60 100 200

100

200

500

1

3

2

04 06 08 1 2 3 4 5 6 8 10 20 30 40

04 06 08 1 2 3 4 5 6 8 10

200

80 10020 3003

03Qn [m3h]

02

50 60 80 100

40 50 60

= pd min lt 5 mbar

VAG

VxH

VAV

115

BVA

GV

xHV

AV 12

0A

VAG

VxH

VAV

125

A

P1

P2

VAG

VxH

VAV

240

AVA

GV

xHV

AV 3

50A

= natural gas (ρ = 080 kgm3) = propane (ρ = 201 kgm3) = air (ρ = 129 kgm3)

The characteristic flow rate curves have been meas-ured with the specified flanges and a fitted strainer If two or more valves are combined the pressure loss of each additional valve drops by approx 5

5 2 Selection example for VAG VAH VRH VAV Natural gas Flow rate Qmax = 30 m3h Inlet pressure pu = 80 mbar Outlet pressure pd max VAG = 60 mbarThe desired control ratio from high-fire to low-fire rate is RV = 101High fire ∆p = pu - pd max = 20 mbar Point P1Low fire pd min = pd max RV2 = 06 mbar Qmin = Qmax RV = 3 m3h ∆p = pu - pd min = 794 mbar Point P2 select VAG 120APoint P1 and point P2 must be within the working range of a unit size We recommend that you select the smallest size to achieve the best control properties

metric imperial

Enter densityFlow rate Qn

Inlet pressure pu

Outlet pressure pd

Product RV v

5 2 1 Calculate VAG VxH VAV

Pressure loss ∆p

∆pmin

Flow rate

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 26

∆p [i

nch

WC]

Qn [SCFH]100 400 600 4000 60001000 200020 30 40 50 200 3006015 80

1

08

1

2

3

4

56

8

10

20

30

40

5060

80

100

200

∆p [m

bar]

5

8

3

20

10

30

40

80

60

300

400

50

04 06 2 3 4 5 808 10 20 30 402

03 60 100 200

100

200

500

1

3

2

04 06 08 1 2 3 4 5 6 8 10 20 30 40

04 06 08 1 2 3 4 5 6 8 10

200

80 10020 3003

03Qn [m3h]

02

50 60 80 100

40 50 60

VAG

115

N

P1VAG

125

N

VAG

120

N

VAG

240

NP2

VAG

350

N

= natural gas (ρ = 080 kgm3) = propane (ρ = 201 kgm3) = air (ρ = 129 kgm3)

The characteristic flow rate curves have been meas-ured with the specified flanges and a fitted strainer If two or more valves are combined the pressure loss of each additional valve drops by approx 5

5 3 Selection example for zero governor VAG NNatural gas Flow rate Qmax = 30 m3h Inlet pressure pu = 20 mbar Outlet pressure pd = 0 mbar (atmospheric pressure)The desired control ratio from high-fire to low-fire rate is RV = 101High fire ∆p = pu - pd max = 20 mbar Point P1Low fire Point P2 Qmin = 24 m3h at ∆p = 20 mbar RV = Qmax Qmin = 1231Point P1 and point P2 must be within the working range of a unit size We recommend that you select the smallest size to achieve the best control properties

metric imperial

Enter densityFlow rate Qn

Inlet pressure pu

Outlet pressure pd

Product RV

5 3 1 Calculate VAG N

Pressure loss ∆p

∆pmin

Flow rate

v

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 27

6 Selection6 1 Selection table for pressure regulator with solenoid valve VAD

Accessories right Accessories left

Type1) T R N F N K P Q Y W S2) G2) R2) L2) M20

cab

le g

land

Plug

with

soc

ket

Plug

with

out s

ocke

t

-25-50 -100 A B Scre

w p

lug

Pres

sure

test

poi

nt

DG

17V

C 3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

Scre

w p

lug

Pres

sure

test

poi

nt

DG

17V

C 3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

VAD 115

VAD 120

VAD 125

VAD 240

VAD 350

= standard = available1) The following nominal inlet fl ange diameters are also available size 1 with nominal diameter DN 10 size 2 with nominal diameters DN 25 DN 32 and DN 50 size 3 with nominal diameters DN 40 and DN 652) Position indicator and bypasspilot gas valve cannot be fi tted together on the same side3) Specify the test point for inlet pressure pu or outlet pressure pdHelp for selecting the pressure regulator VAD can be found on the ProFi DVD wwwkromschroedercom Products DVD Product fi nder ldquoProFirdquo

Order exampleVAD 240RNW-100A

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 28

Selection

6 2 Type code for VADCode DescriptionVAD Pressure regulator with solenoid valve1 ndash 3 SizeT T-product10 ndash 65 Nominal inlet and outlet diameterRNF

Rp internal threadNPT internal thread

ISO fl angeN Quick opening quick closingKPQYW

Mains voltage 24 V DCMains voltage 100 V AC 5060 HzMains voltage 120 V AC 5060 HzMains voltage 200 V AC 5060 HzMains voltage 230 V AC 5060 Hz

SG

Position indicator with visual indicatorPosition indicator for 24 V with visual indicator

RL

Viewed from the right (in the direction of fl ow)Viewed from the left (in the direction of fl ow)

-25-50-100

Outlet pressure pd 25 ndash 25 mbar20 ndash 50 mbar

35 ndash 100 mbarAB

Standard valve seatReduced valve seat

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 29

Selection

6 3 Selection table for airgas ratio control with solenoid valve VAG flow rate regulators VAH VRH

Type1) T R N F N K P Q Y W S2) G2) R2) L2) M20

cab

le g

land

Plug

with

soc

ket

Plug

with

out s

ocke

t

A B E K A N Scre

w p

lug

Pres

sure

test

poi

ntD

G 1

7VC

3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

Scre

w p

lug

Pres

sure

test

poi

ntD

G 1

7VC

3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

VAG 115 VAG 120 VAG 125 VAG 240 VAG 350

VAH 115 VAH 120 VAH 125 VAH 240 VAH 350

VRH 115 VRH 120 VRH 125 VRH 240 VRH 350

= standard = available1) The following nominal inlet fl ange diameters are also available size 1 with nominal diameter DN 10 size 2 with nominal di-

ameters DN 25 DN 32 and DN 50 size 3 with nominal diameters DN 40 and DN 652) Position indicator and bypasspilot gas valve cannot be fi tted together on the same side3) Specify the test point for inlet pressure pu or outlet pressure pdHelp for selecting the regulators can be found on the ProFi DVD wwwkromschroedercom Products DVD Product fi nder ldquoProFirdquo

Order exampleVAG 240RNWAE

Accessories right Accessories left

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 30

Selection

6 4 Type code for VAG VAH VRHCode DescriptionVAGVAHVRH

Airgas ratio control with solenoid valveFlow rate regulator with solenoid valve

Flow rate regulator1 ndash 3 SizeT T-product15 ndash 50 Nominal inlet and outlet diameterRNF

Rp internal threadNPT internal thread

ISO fl angeN1) Quick opening quick closingK1)

P1)

Q1)

Y1)

W1)

Mains voltage 24 V DCMains voltage 100 V AC 5060 HzMains voltage 120 V AC 5060 HzMains voltage 200 V AC 5060 HzMains voltage 230 V AC 5060 Hz

S1)

G1)Position indicator with visual indicator

Position indicator for 24 V with visual indicatorRL

Viewed from the right (in the direction of fl ow)Viewed from the left (in the direction of fl ow)

AB

Standard valve seatReduced valve seat

EKAN

Connection kit for air control pressure psaVAG VAH VRH compression fi tting

VAG plastic hose couplingVAG VAH VRH NPT 18 adapter

VAG zero governor1) Only available for VAG VAV VAH

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 31

6 5 Selection table for variable airgas ratio control with solenoid valve VAVAccessories right Accessories left

Type1) T R N F N K P Q Y W S2) G2) R2) L2) M20

cab

le g

land

Plug

with

soc

ket

Plug

with

out s

ocke

t

A B E K A Scre

w p

lug

Pres

sure

test

poi

ntD

G 1

7VC

3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

Scre

w p

lug

Pres

sure

test

poi

ntD

G 1

7VC

3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

VAV 115

VAV 120

VAV 125

VAV 240

VAV 350

= standard = available1) The following nominal inlet fl ange diameters are also available size 1 with nominal diameter DN 10 size 2 with nominal diameters DN 25 DN 32 and DN 50 size 3 with nominal diameters DN 40 and DN 652) Position indicator and bypasspilot gas valve cannot be fi tted together on the same side3) Specify the test point for inlet pressure pu or outlet pressure pdHelp for selecting the variable airgas ratio control VAV can be found on the ProFi DVD wwwkromschroedercom

Products DVD Product fi nder ldquoProFirdquo

Order exampleVAV 240RNWAK

Selection

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 32

Selection

6 6 Type code for VAVCode DescriptionVAV Variable airgas ratio control with solenoid valve1 ndash 3 SizeT T-product15 ndash 50 Nominal inlet and outlet diameterRNF

Rp internal threadNPT internal thread

ISO fl angeN Quick opening quick closingKPQYW

Mains voltage 24 V DCMains voltage 100 V AC 5060 HzMains voltage 120 V AC 5060 HzMains voltage 200 V AC 5060 HzMains voltage 230 V AC 5060 Hz

SG

Position indicator with visual indicatorPosition indicator for 24 V with visual indicator

RL

Viewed from the right (in the direction of fl ow)Viewed from the left (in the direction of fl ow)

AB

Standard valve seatReduced valve seat

EKA

Connection kit for air control pressure psa and combus-tion chamber control pressure psc

compression fi ttingplastic hose coupling

NPT 18 adapter

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 33

Selection

6 7 AccessoriesModularly configurable withndash Screw plugsndash Pressure test pointsndash Pressure switch DGVC for inlet

andor outlet pressurendash Tightness control TCndash Bypasspilot gas valve VBY 8 for

size 1ndash Bypasspilot gas valve VAS 1For further information see page 37 (Accessories)

Position indicator

Plug with socket

Plug

Screwplugs

Pressuretest points

Pressure switch DGC Tightness

control TC

Bypasspilot gas valve VBY 8 for size 1

Bypasspilot gas valve VAS 1

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 34

7 Project planning informationDo not store or install the unit in the open airThe inlet pressure pu and the outlet pressure pd can be meas-ured on both sides of the valve body To increase the control accuracy an external impulse line can be connected instead of the pressure test point pd

VAD

pu

pd

(psa)

VAGpd

pu

psa

psa

VAD measurement point for the gas outlet pressure pd on the regulator body A combustion chamber control line (psc) can be connected to connection psa for maintaining a constant burner capacityVAG additional measurement point for the air control pressure psa on the regulator body

VAV

psapsc

pu

pd

VAH VRH

pu

pd-

pdpsa-

psa

VAV measurement point for the outlet pressure pd on the regulator bodyVAH additional measurement points for the outlet pressure pd- and the air control pressure psapsa- on the regulator body

7 1 Installation

GFK

VAGVAH

GFKVAD

Sealing material and thread cuttings must not be allowed to get into the valve housing Install a filter upstream of every system

gt20 mmgt0 79

The unit must not be in contact with masonry Minimum clear-ance 20 mm (079 inches)Ensure that there is sufficient space for installation and ad-justment

le +100 degCle +212 degF

The solenoid body heats up during operation ndash depending on ambient temperature (max 60degC140degF) and intrinsic heating (approx 40degC104degF)

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 35

In the case of double solenoid valves the position of the con-nection box can only be changed by removing the actuator and reinstalling it offset by 90deg or 180deg

If more than three valVario controls are installed in line the controls must be supported

The seals in some gas compression fittings are approved for temperatures of up to 70degC (158degF) This temperature limit will not be exceeded if the flow through the pipe is at least 1 msup3h (3531 SCFH) of gas and the maximum ambient temperature is 50degC (122degF)

7 1 1 Installation position

pu ge 80 mbar(80 hPa32 WC)

VAD VAG VAH VRH VAV

In humid environments black solenoid actuator in the vertical upright position only

VAD VAG VAH VRH black solenoid actuator in the vertical upright position or tilted up to the horizontal not upside downVAG VAH horizontal position only if pu ge 80 mbar (32 WC))VAV installation in the vertical position only black solenoid actuator in the vertical upright positionTo ensure that the airgas ratio control VAG the flow rate regulator VAH VRH or the variable airgas ratio control VAV can react quickly when the load is changed the impulse line for the air control pressure psa and for VAV the impulse line for the combustion chamber control pressure psc should be kept as short as possible The tube internal diameter for the impulse line must always be ge 39 mm (015)

VAH VRHIt is not permitted to install a gas solenoid valve VAS down-stream of flow rate regulator VAH VRH and upstream of fine-adjusting valve VMV The VAS would no longer be able to perform its function as a second safety valve if installed in the above-mentioned position

M

VMV

VAH

VASVAS

pd-

psa-psa

VMV

VAH pd-

psa-psa

The measuring orifice in the air line for impulse lines psa and psa- must always be installed downstream of the air control valve

Project planning information gt Installation

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 36

VAVThe impulse line for the combustion chamber control pres-sure psc must be fitted so that no condensation can enter the pressure regulator but rather flows back into the combustion chamber

7 2 Setting the low-fire rate on VAG VAH VRH VAV

-10 +05-05

ndash

+1

-15

mbar

+15

06

1 152

3

N V

+ +ndash

+30 -15+15

ndash

-3

+5

mbar

-5

N

+

VAG VAH VRH VAV

If the burner operates at low-fire rate the gasair mixture can be changed using the parallel shift of the characteristic curve by turning the adjusting screw ldquoNrdquoAdjusting range at low fire VAG VAH VRH -5 to +5 mbar (-195 to +195 WC) VAV -15 to +15 mbar (-06 to +06 WC)

7 3 Setting the high-fire rate on VAVTo set the high-fire rate the transmission ratio is changed us-ing the adjusting screw ldquoVrdquo until the required flue gas values are achievedTransmission ratio V = pdpsa = 061 to 31The settings N and V can influence each other and must be repeated if necessary

+N+V

-V

-N

VAV

psa [mbar]

p d [m

bar]

7 3 1 CalculationWith no connection to the combustion chamber control pres-sure psc pd = V times psa + NWith connection to the combustion chamber control pressure psc (pd - psc) = V times (psa - psc) + N

Project planning information

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 37

pu pd

21579

4836

085310

189

142

8 Accessories8 1 Gas pressure switch DG VC for VAx VRHType Adjusting range [mbar]DG 17VC 2 to 17DG 40VC 5 to 40DG 110VC 30 to 110DG 300VC 100 to 300

Scope of delivery 1 times pressure switch for gas 2 times retaining screws 2 times sealing rings

8 2 Gas pressure switch DG VCT for VAx T VRH TType Adjusting range [WC]DG 17VCT 08 to 68DG 40VCT 2 to 16DG 110VCT 12 to 44DG 300VCT 40 to 120

Scope of delivery 1 times gas pressure switch with AWG 18 connection wires 2 times retaining screws 2 times sealing ringsMonitoring the inlet pressure pu the electrical plug of the pressure switch for gas points towards the inlet flangeMonitoring the outlet pressure pd the electrical plug of the pressure switch for gas points towards the outlet flange

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 38

A BC

D

FE

ACD

F

B

E

8 3 Bypass valvepilot gas valve VAS 18 3 1 VAS 1 attached to VADVAGVAHVAV 1Scope of delivery A 1 times bypasspilot gas valve VAS 1 B 4 times O-rings C 4 times double nuts D 4 times connection parts E 1 times mounting aidBypass valve VAS 1 F 2 times connection pipes if the bypass valve has a blind flange

at the outlet sidePilot gas valve VAS 1 F 1 times connection pipe 1 times sealing plug if the pilot gas valve

has a threaded flange at the outlet side

Accessories

8 3 2 VAS 1 attached to VADVAGVAHVAV 2 VADVAGVAHVAV 3Scope of delivery A 1 times bypasspilot gas valve VAS 1 B 4 times O-rings C 4 times spacer sleeves D 4 times connection parts E 1 times mounting aidBypass valve VAS 1 F 2 times connection pipes if the bypass valve has a blind flange

at the outlet sidePilot gas valve VAS 1 F 1 times connection pipe 1 times sealing plug if the pilot gas valve

has a threaded flange at the outlet side

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 39

2

3

456

810

20

30

405060

80100

∆p [m

bar]

005 01 02 03 05 08 1 2 3 4 51

3

2

Qn [m3h]

1

01

02

03

0405

08

003

002

6 8 10

005 01 02 03 05 08 1 2 3 4 5003 6 8 10

20

005 01 02 03 05 08 1 2 3 4 5003 6 8 10 20

30

∆p [i

nch

WC]

1

2

3

456

810

20

30

40

04

004

006

00801

02

03

0506

08

Qn [SCFH]10 40 60 100 200 3001 500 10002 3 4 5

120 306 8

21 3 4 5 6 7 8 910

8 3 3 Flow rate

The characteristic flow rate curves have been measured for bypass valve VAS 1 with connection pipe diameter 1 to 10 mm (004 to 04) and for the pilot gas valve with 10 mm (04) connection pipe

Bypass valve connection pipe diameter [mm]

Pilo

t gas

val

ve 1

0 m

m (0

4)

conn

ectio

n pi

pe d

iam

eter

Accessories gt Bypass valvepilot gas valve VAS 1

= natural gas (ρ = 080 kgm3) = propane (ρ = 201 kgm3) = air (ρ = 129 kgm3)

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 40

Accessories

8 4 Bypass valvepilot gas valve VBY 8 for VADVAGVAHVAV 1

B

C

AVBY 8

VAx 1

55

(217)40(157)

70 (276)

80(315)

Rp frac14(pilot gas valve)

For mounting on VAD VAG VAH VAV 1 and double solenoid valve VCD VCG VCH VCV 1

8 4 1 Scope of delivery VBY 8I as bypass valveA 1 times bypass valve VBY 8IB 2 times retaining screws with 4 times O-rings both retaining screws

have a bypass orificeC 1 times grease for o-rings

8 4 2 Scope of delivery VBY 8R as pilot gas valveA 1 times pilot gas valve VBY 8RB 2 times retaining screws with 5 x O-rings one retaining screw

has a bypass orifice (2 x O-rings) the other does not (3 x O-rings)

C 1 times grease for O-rings

8 4 3 SelectionType I R W Q K 6L -R -L E B D 05

VBY 8

Order exampleVBY 8RW6L-LED

8 4 4 Type codeCode DescriptionVBY Gas solenoid valve8 Nominal sizeIR

For internal gas pick-up as bypass valveFor external gas pick-up as pilot gas valve

KQW

Mains voltage 24 V DC Mains voltage 120 V AC 5060 HzMains voltage 230 V AC 5060 Hz

6L Electrical connection via plug and socket with LED-R-L

Attachment side of main valve right-hand sideAttachment side of main valve left-hand side

EB

Attached to the VAxEnclosed (separate packing unit)

05D

Nozzle diameter = 05 mm (002)Flow adjustment

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 41

2

01

02

03

05

081

3

456

810

20

30

405060

80100

∆p [m

bar]

1

3

201 02 03 05 1 2 3001 003 4

Qn [m3h]

02 03 05 1 2

01 02 05

002 006

002

002 006 1

0010006 005 01

001

0003

0006 2 3

VBY 8DVBY 805

∆p [i

nch

WC]

1

2

3

456

810

20

30

40

040506

08

1

Qn [SCFH]10 40 60 1005 2081 2 30402

01

02

03

004005006

008

Adjusting range

8 4 5 Flow rateVBY 8 D

+

-

The flow rate can be set by turning the flow rate restrictor (4 mm016 Allen screw) frac14 of a turn Flow rate 10 to 100

VBY 8 05The flow is routed through a 05 mm (002) nozzle and thus has a fixed characteristic flow rate curve Adjustment is not possible

8 4 6 Technical dataInlet pressure pu max 500 mbar (7 psig)Ambient temperature 0 to +60degC (32 to 140degF) no condensation permittedStorage temperature 0 to +40degC (32 to 104degF) no condensation permittedPower consumption 24 V = 8 W 120 V = 8 W 230 V = 95 WEnclosure IP 54

Accessories gt Bypass valvepilot gas valve VBY 8 for VADVAGVAHVAV 1

= natural gas (ρ = 080 kgm3) = propane (ρ = 201 kgm3) = air (ρ = 129 kgm3)

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 42

TC 116VB C

56(22)

49(193)

27(106)

A

A

VCx 1 VCx 2VCx 3

8 5 Tightness control TC 116Vfor VAx 1 ndash 3An adapter plate is required to attach the tightness control to the right- or left-hand side of the pressure regulator with gas solenoid valveScope of delivery A 1 times adapter plate B 2 times O-rings C 2 times retaining screwsFor attachment to left-hand side Order No 74922391 right-hand side Order No 74921995

8 6 Pressure test pointsTest points to check the inlet pressure pu and outlet pressure pdScope of delivery 1 x pressure test points with 1 x profiled sealing rings Order No 74923390

8 7 Cable gland setWhen wiring a double solenoid valve with pressure regula-tor VCx the connection boxes are to be connected using a cable gland setThe cable gland set can only be used if the connection boxes are at the same height and on the same side and if both valves are equipped either with or without a proof of closure switchVA 1 Order No 74921985 VA 2 Order No 74921986 VA 3 Order No 74921987

Accessories

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 43

A B

D

C

Accessories

8 9 Differential pressure orifice

Size PipeDN

Differential pressure orifi cewith outlet dia

1 15 17 mm 0671 20 25 mm 0981 25 30 mm 1182 40 46 mm 1813 50 58 mm 228

If pressure regulator VADVAGVAV 1 is retrofitted upstream of gas solenoid valve VAS 1 a DN 25 differential pressure orifice with outlet opening d = 30 mm (118) must be inserted at the outlet of the pressure regulatorIn the case of pressure regulator VAx 115 or VAx 120 the DN 25 differential pressure orifice must be ordered separately and retrofitted Order No 74922240

8 8 Seal set VA 1 ndash 3VA 1 Order No 74921988 VA 2 Order No 74921989 VA 3 Order No 74921990Scope of deliveryA 1 times double block seal B 2 times O-rings (flange) C 2 times O-rings (pressure switch) for pressure test pointscrew plug D 2 times sealing rings (flat sealing) and 2 times profiled sealing rings

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 44

BA

C

pd-

8 11 Attachment blockFor locked installation of pressure gauge and other acces-soriesScope of delivery A 1 times attachment block B 2 times self-tapping screws for installation C 2 times O-rings

Accessories

8 10 Retaining frameIn the event that a pressure regulator VAx is installed at a later point upstream of a gas solenoid valve VAS a measur-ing orifice VMO or a fine-adjusting valve VMV the retaining frame must be fitted at the inlet of the second device in order to fasten the differential pressure orifice at the regulator outlet Order the retaining frame separatelyRetaining frame for Size 1 Order No 74923029 Size 2 Order No 74923030 Size 3 Order No 74923031

8 12 Gas control lineFine-adjusting valve VMV can be installed on the flow rate regulator VAH for fine adjustment of the gas flow rateThe gas control line for gas outlet pressure pd- is available with 2 18 compression fittingsSize 1 Order No 74924458 Size 2 Order No 74924459

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 45

8 13 Measuring orifice VMOThe measuring orifice VMO is designed to reduce the gas and air flow rates and is installed downstream of the valVario control The measuring orifice is available with Rp internal thread (NPT internal thread) or flange to ISO 7005See wwwdocuthekcom Elster Kromschroumlder Krom-schroumlder LBE Products 03 Valves and butterfly valves valVario accessories Type of document Technical Informa-tion VMO

Accessories

8 14 Filter module VMFUsing the filter module VMF the gas flow upstream of the gas solenoid valve VAS and the airgas ratio control is cleaned The filter module is available with Rp internal thread (NPT internal thread) or flange to ISO 7005 and can also be supplied with fitted pressure switch as an optionSee wwwdocuthekcom Elster Kromschroumlder Krom-schroumlder LBE Products 03 Valves and butterfly valves valVario accessories Type of document Technical Informa-tion VMF

8 15 Fine-adjusting valve VMVThe flow rate is set using the fine-adjusting valve VMV The fine-adjusting valve is available with Rp internal thread (NPT internal thread) or flange to ISO 7005See wwwdocuthekcom Elster Kromschroumlder Krom-schroumlder LBE Products 03 Valves and butterfly valves valVario accessories Type of document Technical Infor-mation VMV

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 46

9 Technical dataGas types natural gas LPG (gaseous) biologically produced methane (max 01 -by-vol H2S) or clean air other gases on request The gas must be clean and dry in all temperature conditions and must not contain condensateCE and FM approved UL listed max inlet pressure pu 10 ndash 500 mbar (4 ndash 200 WC) FM approved (230 V AC 120 V AC 24 V DC) non opera-tional pressure 700 mbar (10 psig)ANSICSA approved (230 V AC 120 V AC 24 V DC) up to 350 mbar (5 psig)Opening time of the solenoid valve quick opening le 05 s Closing time quick closing lt 1 sMedium and ambient temperatures -20 to +60degC (-4 to +140degF) no condensation permittedStorage temperature -20 to +40degC (-4 to +104degF)Enclosure IP 65Valve housing aluminium valve seal NBRConnection flanges with internal thread Rp to ISO 7-1 NPT to ANSIASMESafety valve Class A to EN 161 Factory Mutual Research Class 7400 Process Control Valves (230 V AC 120 V AC 24 V DC) ANSI Z2121 and CSA 65 ANSI Z2118 and CSA 63Control class A to EN 88-1Control range up to 101

Mains voltage 230 V AC +10-15 5060 Hz 200 V AC +10-15 5060 Hz 120 V AC +10-15 5060 Hz 100 V AC +10-15 5060 Hz 24 V DC plusmn20Duty cycle 100Power factor of the solenoid coil cos φ = 09Power consumption

Type Voltage Power

VAx 1

24 V DC 25 W ndash100 V AC 25 W (26 VA)120 V AC 25 W (26 VA)200 V AC 25 W (26 VA)230 V AC 25 W (26 VA)

VAx 2 VAx 3

24 V DC 36 W ndash100 V AC 36 W (40 VA)120 V AC 40 W (44 VA)200 V AC 40 W (44 VA)230 V AC 40 W (44 VA)

VBY24 V DC 8 W ndash

120 V AC 8 W ndash230 V AC 95 W ndash

Cable gland M20 times 15Electrical connection cable with max 25 mm2 (AWG 12) or plug with socket to EN 175301-803

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 47

Position indicator contact rating

Type Voltage Min current(resistive load)

Max current(resistive load)

VAxS VCxS 12 ndash 250 V AC 5060 Hz 100 mA 3 AVAxG VCxG 12 ndash 30 V DC 2 mA 01 A

Position indicator switching frequency max 5 times per minute

Switching current [A]

Switching cyclescos φ = 1 cos φ = 06

01 500000 50000005 300000 250000

1 200000 1000003 100000 ndash

Limited to max 200000 cycles for heating systems

9 1 VADOutlet pressure pd VAD-25 25 ndash 25 mbar (1 ndash 10 WC) VAD-50 20 ndash 50 mbar (8 ndash 20 WC) VAD-100 35 ndash 100 mbar (14 ndash 40 WC)Combustion chamber control pressure psc (connection psa)

-20 to +20 mbar (-78 to +78 WC)

VAD

pu

pd

(psa)

9 2 VAGOutlet pressure pd 05 ndash 100 mbar (02 ndash 40 WC)Air control pressure psa 05 ndash 100 mbar (02 ndash 40 WC)

Adjusting range at low fire plusmn5 mbar (plusmn2 WC)Transmission ratio of gas to air 11The inlet pressure must always be higher than the air control pressure psa + pressure loss ∆p + 5 mbar (2 WC)

VAGpd

pu

psa

psa

VAGK 1 x 18 coupling for plastic hose (internal dia 39 mm (015) external dia 61 mm (024)) or VAGE 1 x 18 compression fitting for 6 times 1 tube or VAGA 1 x NPT 18 adapter or VAGN zero governor with breathing orifice

9 3 VAH VRHAir control pressure psa 06 ndash 100 mbar (024 ndash 40 WC) Differential air pressure ∆psa (psa - psa-) 06 ndash 50 mbar (024 ndash 197 WC) Differential gas pressure ∆pd (pd - pd-) 06 ndash 50 mbar (024 ndash 197 WC)Transmission ratio of gas to air 11The inlet pressure must always be higher than the differen-tial air pressure ∆psa + pressure loss ∆p + max gas pres-sure on burner + 5 mbar (2 WC)Adjusting range at low fire plusmn5 mbar (plusmn2 WC)

Technical data

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 48

VAHVRH

pd-

pu

psa-

psa

Connection of the air control pressure psaVAHE VRHE 3 x 18 compression fitting for 6 times 1 tube or VAHA VRHA 3 x NPT 18 adapter

9 4 VAVOutlet pressure pd 05 ndash 30 mbar (02 ndash 117 WC)Air control pressure psa 04 ndash 30 mbar (015 ndash 117 WC)Combustion chamber control pressure psc

-20 to +20 mbar (-78 to +78 WC)Min control pressure differential psa - psc 04 mbar (015 WC)Min pressure differential pd - psc 05 mbar (02 WC)Adjusting range at low fire plusmn15 mbar (plusmn06 WC)Transmission ratio of gas to air 061 to 31The inlet pressure pu must always be higher than the air control pressure psa times transmission ratio V + pressure loss ∆p + 15 mbar (06 WC)

pu

pd psapsc

VAV

VAVK 2 x plastic hose couplings (internal dia 39 mm (015) external dia 61 mm (024)) or VAVE 2 x 18 compression fitting for 6 times 1 tube or VAVA 2 x NPT 18 adapter

Technical data

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 49

9 5 Safety-specific characteristic values for VAx 1 ndash 3For SILSuitable for Safety Integrity Level SIL 1 2 3

Diagnostic coverage DC 0

Type of subsystem Type A to EN 61508-2 74312

Operating mode High demand mode pursu-ant to EN 61508-4 3512

For PLSuitable for Performance Level PL a b c d e

Category B 1 2 3 4Common cause failure CCF gt 65Application of essential safety requirements Satisfied

Application of tried-and-tested safety requirements Satisfied

For SIL and PL

B10d value

Operating cyclesVAD VAG VAV VAH 1 10094360VAD VAG VAV VAH 2 8229021VAD VAG VAV VAH 3 6363683

Hardware fault tolerance (1 valve) HFT 0

Hardware fault tolerance (2 valves) HFT 1

Safe failure fraction SFF gt 90Fraction of undetected com-mon cause failures β ge 2

Max service life under operating conditions10 years after date of production plus max 12 year in stor-age prior to first use or once the given number of operating cycles has been reached depending on which is achieved firstThe devices are suitable for single-channel systems (HFT = 0) up to SIL 2PL d and up to SIL 3PL e when two re-dundant valves are installed in a double-channel architecture (HFT = 1) provided that the complete system complies with the requirements of EN 61508ISO 13849

For a glossary of terms see page 53 (Glossary)

Technical data

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 50

nop 1hnop 1a

sB10d

T10d aPFHD (1 VAx) 1h

PFHD (2 VAx) 1h

PFDavg (1 VAx)

PFDavg (2 VAx)

Technical data gt Safety-specific characteristic values for VAx 1 ndash 3

9 5 1 Determining the PFHD value the λD value and the MTTFd value

PFHD = λD = x nop= 1MTTFd

01B10d

PFDavg = x λD x 24 x 365 x T10d 12

Type

Cycle time

suitable for

suitable for

PFHD = Probability of dangerous failure (HDM = high de-mand mode) [1hour]PFDavg = Average probability of dangerous failure on de-mand (LDM = low demand mode)λD = Mean dangerous failure rate [1hour]MTTFd = Mean time to dangerous failure [hours]nop = Demand rate (mean number of annual operations) [1hour]

9 5 2 Calculating the PFHD and PFDavg

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 51

VAD VAG VAH VAV

H1

Rp frac14(NPT frac14)

H2

E

LF

F

H4

H3

B

VAxS VAxF

L2G

G

Technical data

9 6 Dimensions

Type

Connec-tion Dimensions

WeightRpNPT DN

L L2 E F G H1 H2 H3 H4 Bmm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch kg lbs

VAx 115 12 15 75 29 ndash ndash 75 29 15 06 ndash ndash 143 56 82 32 161 63 117 46 97 38 18 40VAH 115 12 15 75 29 ndash ndash 75 29 15 06 ndash ndash 143 56 100 39 161 63 135 53 97 38 2 44VAx 120 34 20 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 82 33 161 63 117 46 97 38 19 42VAH 120 34 20 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 100 39 161 63 135 53 97 38 21 46VAx 125 1 25 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 82 33 161 63 117 46 97 38 19 42VAH 125 1 25 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 100 39 161 63 135 53 97 38 21 46VAx 240 112 40 128 50 200 79 85 33 29 11 66 26 170 67 112 44 191 75 162 64 125 49 44 97VAH 240 112 40 128 50 200 79 85 33 29 11 66 26 170 67 132 52 191 75 182 72 125 49 47 104VAx 350 2 50 155 61 230 91 85 33 36 14 74 29 180 70 135 53 201 79 196 77 160 63 61 134VAH 350 2 50 155 61 230 91 85 33 36 14 74 29 180 70 156 61 201 79 217 85 160 63 64 141

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 52

10 Converting unitssee wwwadlatusorg

11 Maintenance cyclesAt least once per annum at least twice per annum for biologi-cally produced methaneIf the flow rate drops clean the strainer

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 53

12 Glossary12 1 Diagnostic coverage DCMeasure of the effectiveness of diagnostics which may be determined as the ratio between the failure rate of detected dangerous failures and the failure rate of total dangerous failuresNOTE Diagnostic coverage can exist for the whole or parts of a safety-related system For example diagnostic cover-age could exist for sensors andor logic system andor final elements Unit see EN ISO 13849-12008

12 2 Mode of operationHigh demand mode or continuous modeOperating mode where the frequency of demands for opera-tion made on a safety-related system is greater than one per year or greater than twice the proof-test frequencysee EN 61508-42008

12 3 CategoryClassification of the safety-related parts of a control system in respect of their resistance to faults and their subsequent behaviour in the fault condition and which is achieved by the structural arrangement of the parts fault detection andor by their reliability see EN ISO 13849-12008

12 4 Common cause failure CCFFailures of different items resulting from a single event where these failures are not consequences of each othersee EN ISO 13849-12008

12 5 Fraction of undetected common cause failures β Fraction of undetected failures of redundant components due to a single event whereby these failures are not based on mutual causesNOTE β is expressed as a fraction in the equations and as a percentage elsewheresee EN 61508-62010

12 6 B10d valueMean number of cycles until 10 of the components fail dan-gerouslysee EN ISO 13849-12008

12 7 T10d valueMean time until 10 of the components fail dangerouslysee EN ISO 13849-12008

12 8 Hardware fault tolerance HFTA hardware fault tolerance of N means that N + 1 is the mini-mum number of faults that could cause a loss of the safety functionsee IEC 61508-22010

12 9 Mean dangerous failure rate λD Mean rate of dangerous failures during operation time (T10d) Unit 1hsee EN ISO 13849-12008

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 54

12 10 Safe failure fraction SFFFraction of safe failures related to all failures which are as-sumed to appearsee EN 13611A22011

12 11 Probability of dangerous failure PFHD Value describing the likelihood of dangerous failure per hour of a component for high demand mode or continuous mode Unit 1hsee EN 13611A22011

12 12 Mean time to dangerous failure MTTFd Expectation of the mean time to dangerous failuresee EN ISO 13849-12008

12 13 Demand rate nop Mean number of annual operationssee EN ISO 13849-12008

12 14 Average probability of dangerous failure on demand PFDavg (LDM = 1 ndash 10 switching cyclesyear)Average probability of a dangerous failure of the safety function on demand (LDM = low demand mode)see EN 61508-6

Glossary

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415

Finally we are offering you the opportunity to assess this ldquoTechnical Information (TI)rdquo and to give us your opinion so that we can improve our documents further and suit them to your needs

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Remarks

(Adobe Reader 7 or higher required) wwwadobecom

Elster GmbH Postfach 2809 middot 49018 Osnabruumlck Strotheweg 1 middot 49504 Lotte (Buumlren) GermanyT +49 541 1214-0 F +49 541 1214-370 infokromschroedercomwwwkromschroedercom

The current addresses of our international agents are available on the Internetwwwkromschroederdeindexphpid=718ampL=1

We reserve the right to make technical modifications in the interests of progressCopyright copy 2015 Elster GmbH All rights reserved

Contact

Feedback

0325

0530

  • Pressure regulators with solenoid valve VAD VAG VAV VAH
  • Flow rate regulator VRH
  • Pressure regulators with double solenoid valve VCD VCG VCV VCH
  • Contents
  • 1 Application
    • 11 Examples of application
      • 111 Constant pressure control
      • 112 Constant pressure control with two gas solenoid valves
      • 113 Constant pressure control with max pressure switch
      • 114 Constant pressure control with non-controlled pilot gas outlet
      • 115 Modulating control
      • 116 Modulating control with two gas solenoid valves
      • 117 Modulating control with two gas solenoid valves and inlet pressure switch
      • 118 HighLow control
      • 119 Zero pressure control
      • 1110 Staged flow rate control
      • 1111 Continuous or staged flow rate control
      • 1112 Modulating control with variable airgas ratio control with gas solenoid valve
      • 1113 Modulating control in residential heat generation
          • 2 Certification
          • 3 Function
            • 31 VAD VAG VAH VRH VAV
              • 311 Pressure regulator for gas VAD
              • 312 Airgas ratio control VAG
              • 313 Flow rate regulators VAH VRH
              • 314 Variable airgas ratio control VAV
              • 315 Pressure regulator with gas solenoid valve VAxS position indicator with visual indicator
                • 32 Animation
                • 33 Connection diagram
                  • 331 VAx with M20 cable gland
                  • 332 VAx with plug
                  • 333 VAS with VADVAGVAHVAV with M20 cable gland
                  • 334 VAS with VADVAGVAHVAV with plug
                      • 4 Replacement possibilities for MODULINE pressure regulators with gas solenoid valve
                        • 41 GVS GVI GVIB GVR and GVRH are to be replaced by VAD VAG VAG+VAS VAH and VAV
                          • 5 Flow rate
                            • 51 Selection example for VAD
                              • 511 Calculate VAD
                                • 52 Selection example for VAG VAH VRH VAV
                                  • 521 CalculateVAG VxHVAV
                                    • 53 Selection example for zero governor VAGN
                                      • 531 Calculate VAGN
                                          • 6 Selection
                                            • 61 Selection table for pressure regulator with solenoid valve VAD
                                            • 62 Type code for VAD
                                            • 63 Selection table for airgas ratio control with solenoid valve VAG flow rate regulators VAH VRH
                                            • 64 Type code for VAG VAH VRH
                                            • 65 Selection table for variable airgas ratio control with solenoid valve VAV
                                            • 66 Type code for VAV
                                            • 67 Accessories
                                              • 7 Project planning information
                                                • 71 Installation
                                                  • 711 Installation position
                                                    • 72 Setting the low-fire rate on VAG VAH VRH VAV
                                                    • 73 Setting the high-fire rate on VAV
                                                      • 731 Calculation
                                                          • 8 Accessories
                                                            • 81 Gas pressure switch DGVC for VAx VRH
                                                            • 82 Gas pressure switch DGVCT for VAxT VRHT
                                                            • 83 Bypass valvepilot gas valve VAS 1
                                                              • 831 VAS 1 attached to VADVAGVAHVAV 1
                                                              • 832 VAS 1 attached to VADVAGVAHVAV 2 VADVAGVAHVAV 3
                                                              • 833 Flow rate
                                                                • 84 Bypass valvepilot gas valve VBY 8 for VADVAGVAHVAV 1
                                                                  • 841 Scope of delivery VBY 8I as bypass valve
                                                                  • 842 Scope of delivery VBY 8R as pilot gas valve
                                                                  • 843 Selection
                                                                  • 844 Type code
                                                                  • 845 Flow rate
                                                                  • 846 Technical data
                                                                    • 85 Tightness control TC 116V
                                                                    • 86 Pressure test points
                                                                    • 87 Cable gland set
                                                                    • 88 Seal set VA 1thinspndashthinsp3
                                                                    • 89 Differential pressure orifice
                                                                    • 810 Retaining frame
                                                                    • 811 Attachment block
                                                                    • 812 Gas control line
                                                                    • 813 Measuring orifice VMO
                                                                    • 814 Filter module VMF
                                                                    • 815 Fine-adjusting valve VMV
                                                                      • 9 Technical data
                                                                        • 91 VAD
                                                                        • 92 VAG
                                                                        • 93 VAH VRH
                                                                        • 94 VAV
                                                                        • 95 Safety-specific characteristic values for VAx 1thinspndashthinsp3
                                                                          • 951 Determining the PFHD value the λD value and the MTTFd value
                                                                          • 952 Calculating the PFHD and PFDavg
                                                                            • 96 Dimensions
                                                                              • 10 Converting units
                                                                              • 11 Maintenance cycles
                                                                              • 12 Glossary
                                                                                • 121 Diagnostic coverage DC
                                                                                • 122 Mode of operation
                                                                                • 123 Category
                                                                                • 124 Common cause failure CCF
                                                                                • 125 Fraction of undetected common cause failures β
                                                                                • 126 B10d value
                                                                                • 127 T10d value
                                                                                • 128 Hardware fault tolerance HFT
                                                                                • 129 Mean dangerous failure rate λD
                                                                                • 1210 Safe failure fraction SFF
                                                                                • 1211 Probability of dangerous failure PFHD
                                                                                • 1212 Mean time to dangerous failure MTTFd
                                                                                • 1213 Demand rate nop
                                                                                • 1214 Average probability of dangerous failure on demand PFDavg
                                                                                  • Feedback
                                                                                  • Contact
                                                                                      1. naechste_Seite 24
                                                                                      2. naechste Seite 18
                                                                                      3. naechste Seite 6
                                                                                      4. naechste Seite 16
                                                                                      5. naechste Seite 14
                                                                                      6. naechste Seite 25
                                                                                      7. naechste_Seite 11
                                                                                      8. naechste_Seite 17
                                                                                      9. fbArbeitspunkt_Min Ja
                                                                                      10. fbArbeitspunkt Ja
                                                                                      11. ftProgramm Standard-Programm
                                                                                      12. fz_kv
                                                                                      13. fz_pe 80
                                                                                      14. fz_pG 60
                                                                                      15. fzDelta_p_Soll 20
                                                                                      16. ftEinheit_Druck mbar
                                                                                      17. fatTyp [115]
                                                                                      18. fbArbeitspunkt_Min_2 Ja
                                                                                      19. fbArbeitspunkt_2 Ja
                                                                                      20. ftRegler_Typ VAG
                                                                                      21. ftProgramm_2 Standard-Programm
                                                                                      22. fz_kv_2
                                                                                      23. fatMedium [08]
                                                                                      24. fzDichte 08
                                                                                      25. ftEinheit_Dichte kgm3
                                                                                      26. fzV_Norm 30
                                                                                      27. ftEinheit_Volstrom m3h
                                                                                      28. fz_pe_2 80
                                                                                      29. fz_pG_2 60
                                                                                      30. fzDelta_p_Soll_2 20
                                                                                      31. ftEinheit_Druck2 [mbar]
                                                                                      32. ftEinheit_Geschw [ms]
                                                                                      33. fatTyp_2 [10954451150103322]
                                                                                      34. fbArbeitspunkt_Min_3 Ja
                                                                                      35. fbArbeitspunkt_3 Ja
                                                                                      36. ftProgramm_3 Standard-Programm
                                                                                      37. fz_kv_3
                                                                                      38. fz_pe_3 20
                                                                                      39. fz_pG_3 0
                                                                                      40. fzDelta_p_Soll_3 20
                                                                                      41. fatTyp_3 [123]
                                                                                      42. fatSchaltleistung [6363683]
                                                                                      43. fz_nop_Stunde 1
                                                                                      44. fz_nop_Jahr 8760
                                                                                      45. fzZyklus 3600
                                                                                      46. fzB10d 6363683
                                                                                      47. fzT10d 10
                                                                                      48. fzPFHd_1V 15714170551864384e-8
                                                                                      49. fzPFDavg_1V
                                                                                      50. ftGeeignet_1V PL d SIL 2
                                                                                      51. fzPFHd_2V 33505832253532625e-10
                                                                                      52. fzPFDavg_2V
                                                                                      53. ftGeeignet_2V PL e SIL 3
                                                                                      54. ftUebersicht Off
                                                                                      55. ftVerstaendlichkeit Off
                                                                                      56. ftFehlende_Info
                                                                                      57. ftUmfang Off
                                                                                      58. ftVerwendung_1 Off
                                                                                      59. ftVerwendung_2 Off
                                                                                      60. ftVerwendung_3 Off
                                                                                      61. ftVerwendung_4 Off
                                                                                      62. ftNavigation Off
                                                                                      63. ftTaetigkeitsbereich Off
                                                                                      64. ftBemerkung
                                                                                      65. Michael Rehkamp Elster Kromschroumlder>btnSenden
Page 24: VAD, VAG, VAV, VAH, VRH, VCD, VCG, VCV, VCH · PDF fileVAD, VAG, VAH, VAV, VRH, VCD, VCG, VCV, VCH · Edition 04.15 6 VAD VAD VAS 1 .1 Examples of application 1 .1 .1 Constant pressure

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 24

∆p [i

nch

WC]

Qn [SCFH]100 400 600 4000 60001000 200020 30 40 50 200 3006015 80

1

08

1

2

3

4

56

8

10

20

30

40

5060

80

100

200

∆p [m

bar]

5

8

3

20

10

30

40

80

60

300

400

50

04 06 1 2 3 4 5 808 10 20 30 402

03 60 100 200

100

200

500

1

3

2

04 06 08 1 2 3 4 5 6 8 10 20 30 40

04 06 08 1 2 3 4 5 6 8 10

200

80 10020 3003

03Qn [m3h]

02

50 60 80 100

40 50 60

VAD

115

B

VAD

120

AVA

D 12

5A

P1P2

VAD

240

AVA

D 35

0A

= natural gas (ρ = 080 kgm3) = propane (ρ = 201 kgm3) = air (ρ = 129 kgm3)

The characteristic flow rate curves have been meas-ured with the specified flanges and a fitted strainer If two or more valves are combined the pressure loss of each additional valve drops by approx 5

metric imperial

Enter densityFlow rate Qn

Inlet pressure pu

Outlet pressure pd

Product RV v

Pressure loss ∆p

∆pmin

5 Flow rate5 1 Selection example for VADNatural gas Flow rate Qmax = 30 m3h Inlet pressure pu = 80 mbar Outlet pressure pd = 60 mbarThe desired control ratio from high-fire to low-fire rate is RV = 101High fire ∆p = pu - pd = 20 mbar Point P1Low fire Point P2 Qmin = 26 m3h at ∆p = 20 mbar RV = Qmax Qmin = 1151

Point P1 and point P2 must be within the working range of a unit size We recommend that you select the smallest size to achieve the best control properties

5 1 1 Calculate VAD

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 25

∆p [i

nch

WC]

Qn [SCFH]100 400 600 4000 60001000 200020 30 40 50 200 3006015 80

1

08

1

2

3

4

56

8

10

20

30

40

5060

80

100

200

∆p [m

bar]

5

8

3

20

10

30

40

80

60

300

400

50

04 06 1 2 3 4 5 808 10 20 30 402

03 60 100 200

100

200

500

1

3

2

04 06 08 1 2 3 4 5 6 8 10 20 30 40

04 06 08 1 2 3 4 5 6 8 10

200

80 10020 3003

03Qn [m3h]

02

50 60 80 100

40 50 60

= pd min lt 5 mbar

VAG

VxH

VAV

115

BVA

GV

xHV

AV 12

0A

VAG

VxH

VAV

125

A

P1

P2

VAG

VxH

VAV

240

AVA

GV

xHV

AV 3

50A

= natural gas (ρ = 080 kgm3) = propane (ρ = 201 kgm3) = air (ρ = 129 kgm3)

The characteristic flow rate curves have been meas-ured with the specified flanges and a fitted strainer If two or more valves are combined the pressure loss of each additional valve drops by approx 5

5 2 Selection example for VAG VAH VRH VAV Natural gas Flow rate Qmax = 30 m3h Inlet pressure pu = 80 mbar Outlet pressure pd max VAG = 60 mbarThe desired control ratio from high-fire to low-fire rate is RV = 101High fire ∆p = pu - pd max = 20 mbar Point P1Low fire pd min = pd max RV2 = 06 mbar Qmin = Qmax RV = 3 m3h ∆p = pu - pd min = 794 mbar Point P2 select VAG 120APoint P1 and point P2 must be within the working range of a unit size We recommend that you select the smallest size to achieve the best control properties

metric imperial

Enter densityFlow rate Qn

Inlet pressure pu

Outlet pressure pd

Product RV v

5 2 1 Calculate VAG VxH VAV

Pressure loss ∆p

∆pmin

Flow rate

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 26

∆p [i

nch

WC]

Qn [SCFH]100 400 600 4000 60001000 200020 30 40 50 200 3006015 80

1

08

1

2

3

4

56

8

10

20

30

40

5060

80

100

200

∆p [m

bar]

5

8

3

20

10

30

40

80

60

300

400

50

04 06 2 3 4 5 808 10 20 30 402

03 60 100 200

100

200

500

1

3

2

04 06 08 1 2 3 4 5 6 8 10 20 30 40

04 06 08 1 2 3 4 5 6 8 10

200

80 10020 3003

03Qn [m3h]

02

50 60 80 100

40 50 60

VAG

115

N

P1VAG

125

N

VAG

120

N

VAG

240

NP2

VAG

350

N

= natural gas (ρ = 080 kgm3) = propane (ρ = 201 kgm3) = air (ρ = 129 kgm3)

The characteristic flow rate curves have been meas-ured with the specified flanges and a fitted strainer If two or more valves are combined the pressure loss of each additional valve drops by approx 5

5 3 Selection example for zero governor VAG NNatural gas Flow rate Qmax = 30 m3h Inlet pressure pu = 20 mbar Outlet pressure pd = 0 mbar (atmospheric pressure)The desired control ratio from high-fire to low-fire rate is RV = 101High fire ∆p = pu - pd max = 20 mbar Point P1Low fire Point P2 Qmin = 24 m3h at ∆p = 20 mbar RV = Qmax Qmin = 1231Point P1 and point P2 must be within the working range of a unit size We recommend that you select the smallest size to achieve the best control properties

metric imperial

Enter densityFlow rate Qn

Inlet pressure pu

Outlet pressure pd

Product RV

5 3 1 Calculate VAG N

Pressure loss ∆p

∆pmin

Flow rate

v

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 27

6 Selection6 1 Selection table for pressure regulator with solenoid valve VAD

Accessories right Accessories left

Type1) T R N F N K P Q Y W S2) G2) R2) L2) M20

cab

le g

land

Plug

with

soc

ket

Plug

with

out s

ocke

t

-25-50 -100 A B Scre

w p

lug

Pres

sure

test

poi

nt

DG

17V

C 3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

Scre

w p

lug

Pres

sure

test

poi

nt

DG

17V

C 3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

VAD 115

VAD 120

VAD 125

VAD 240

VAD 350

= standard = available1) The following nominal inlet fl ange diameters are also available size 1 with nominal diameter DN 10 size 2 with nominal diameters DN 25 DN 32 and DN 50 size 3 with nominal diameters DN 40 and DN 652) Position indicator and bypasspilot gas valve cannot be fi tted together on the same side3) Specify the test point for inlet pressure pu or outlet pressure pdHelp for selecting the pressure regulator VAD can be found on the ProFi DVD wwwkromschroedercom Products DVD Product fi nder ldquoProFirdquo

Order exampleVAD 240RNW-100A

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 28

Selection

6 2 Type code for VADCode DescriptionVAD Pressure regulator with solenoid valve1 ndash 3 SizeT T-product10 ndash 65 Nominal inlet and outlet diameterRNF

Rp internal threadNPT internal thread

ISO fl angeN Quick opening quick closingKPQYW

Mains voltage 24 V DCMains voltage 100 V AC 5060 HzMains voltage 120 V AC 5060 HzMains voltage 200 V AC 5060 HzMains voltage 230 V AC 5060 Hz

SG

Position indicator with visual indicatorPosition indicator for 24 V with visual indicator

RL

Viewed from the right (in the direction of fl ow)Viewed from the left (in the direction of fl ow)

-25-50-100

Outlet pressure pd 25 ndash 25 mbar20 ndash 50 mbar

35 ndash 100 mbarAB

Standard valve seatReduced valve seat

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 29

Selection

6 3 Selection table for airgas ratio control with solenoid valve VAG flow rate regulators VAH VRH

Type1) T R N F N K P Q Y W S2) G2) R2) L2) M20

cab

le g

land

Plug

with

soc

ket

Plug

with

out s

ocke

t

A B E K A N Scre

w p

lug

Pres

sure

test

poi

ntD

G 1

7VC

3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

Scre

w p

lug

Pres

sure

test

poi

ntD

G 1

7VC

3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

VAG 115 VAG 120 VAG 125 VAG 240 VAG 350

VAH 115 VAH 120 VAH 125 VAH 240 VAH 350

VRH 115 VRH 120 VRH 125 VRH 240 VRH 350

= standard = available1) The following nominal inlet fl ange diameters are also available size 1 with nominal diameter DN 10 size 2 with nominal di-

ameters DN 25 DN 32 and DN 50 size 3 with nominal diameters DN 40 and DN 652) Position indicator and bypasspilot gas valve cannot be fi tted together on the same side3) Specify the test point for inlet pressure pu or outlet pressure pdHelp for selecting the regulators can be found on the ProFi DVD wwwkromschroedercom Products DVD Product fi nder ldquoProFirdquo

Order exampleVAG 240RNWAE

Accessories right Accessories left

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 30

Selection

6 4 Type code for VAG VAH VRHCode DescriptionVAGVAHVRH

Airgas ratio control with solenoid valveFlow rate regulator with solenoid valve

Flow rate regulator1 ndash 3 SizeT T-product15 ndash 50 Nominal inlet and outlet diameterRNF

Rp internal threadNPT internal thread

ISO fl angeN1) Quick opening quick closingK1)

P1)

Q1)

Y1)

W1)

Mains voltage 24 V DCMains voltage 100 V AC 5060 HzMains voltage 120 V AC 5060 HzMains voltage 200 V AC 5060 HzMains voltage 230 V AC 5060 Hz

S1)

G1)Position indicator with visual indicator

Position indicator for 24 V with visual indicatorRL

Viewed from the right (in the direction of fl ow)Viewed from the left (in the direction of fl ow)

AB

Standard valve seatReduced valve seat

EKAN

Connection kit for air control pressure psaVAG VAH VRH compression fi tting

VAG plastic hose couplingVAG VAH VRH NPT 18 adapter

VAG zero governor1) Only available for VAG VAV VAH

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 31

6 5 Selection table for variable airgas ratio control with solenoid valve VAVAccessories right Accessories left

Type1) T R N F N K P Q Y W S2) G2) R2) L2) M20

cab

le g

land

Plug

with

soc

ket

Plug

with

out s

ocke

t

A B E K A Scre

w p

lug

Pres

sure

test

poi

ntD

G 1

7VC

3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

Scre

w p

lug

Pres

sure

test

poi

ntD

G 1

7VC

3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

VAV 115

VAV 120

VAV 125

VAV 240

VAV 350

= standard = available1) The following nominal inlet fl ange diameters are also available size 1 with nominal diameter DN 10 size 2 with nominal diameters DN 25 DN 32 and DN 50 size 3 with nominal diameters DN 40 and DN 652) Position indicator and bypasspilot gas valve cannot be fi tted together on the same side3) Specify the test point for inlet pressure pu or outlet pressure pdHelp for selecting the variable airgas ratio control VAV can be found on the ProFi DVD wwwkromschroedercom

Products DVD Product fi nder ldquoProFirdquo

Order exampleVAV 240RNWAK

Selection

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 32

Selection

6 6 Type code for VAVCode DescriptionVAV Variable airgas ratio control with solenoid valve1 ndash 3 SizeT T-product15 ndash 50 Nominal inlet and outlet diameterRNF

Rp internal threadNPT internal thread

ISO fl angeN Quick opening quick closingKPQYW

Mains voltage 24 V DCMains voltage 100 V AC 5060 HzMains voltage 120 V AC 5060 HzMains voltage 200 V AC 5060 HzMains voltage 230 V AC 5060 Hz

SG

Position indicator with visual indicatorPosition indicator for 24 V with visual indicator

RL

Viewed from the right (in the direction of fl ow)Viewed from the left (in the direction of fl ow)

AB

Standard valve seatReduced valve seat

EKA

Connection kit for air control pressure psa and combus-tion chamber control pressure psc

compression fi ttingplastic hose coupling

NPT 18 adapter

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 33

Selection

6 7 AccessoriesModularly configurable withndash Screw plugsndash Pressure test pointsndash Pressure switch DGVC for inlet

andor outlet pressurendash Tightness control TCndash Bypasspilot gas valve VBY 8 for

size 1ndash Bypasspilot gas valve VAS 1For further information see page 37 (Accessories)

Position indicator

Plug with socket

Plug

Screwplugs

Pressuretest points

Pressure switch DGC Tightness

control TC

Bypasspilot gas valve VBY 8 for size 1

Bypasspilot gas valve VAS 1

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 34

7 Project planning informationDo not store or install the unit in the open airThe inlet pressure pu and the outlet pressure pd can be meas-ured on both sides of the valve body To increase the control accuracy an external impulse line can be connected instead of the pressure test point pd

VAD

pu

pd

(psa)

VAGpd

pu

psa

psa

VAD measurement point for the gas outlet pressure pd on the regulator body A combustion chamber control line (psc) can be connected to connection psa for maintaining a constant burner capacityVAG additional measurement point for the air control pressure psa on the regulator body

VAV

psapsc

pu

pd

VAH VRH

pu

pd-

pdpsa-

psa

VAV measurement point for the outlet pressure pd on the regulator bodyVAH additional measurement points for the outlet pressure pd- and the air control pressure psapsa- on the regulator body

7 1 Installation

GFK

VAGVAH

GFKVAD

Sealing material and thread cuttings must not be allowed to get into the valve housing Install a filter upstream of every system

gt20 mmgt0 79

The unit must not be in contact with masonry Minimum clear-ance 20 mm (079 inches)Ensure that there is sufficient space for installation and ad-justment

le +100 degCle +212 degF

The solenoid body heats up during operation ndash depending on ambient temperature (max 60degC140degF) and intrinsic heating (approx 40degC104degF)

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 35

In the case of double solenoid valves the position of the con-nection box can only be changed by removing the actuator and reinstalling it offset by 90deg or 180deg

If more than three valVario controls are installed in line the controls must be supported

The seals in some gas compression fittings are approved for temperatures of up to 70degC (158degF) This temperature limit will not be exceeded if the flow through the pipe is at least 1 msup3h (3531 SCFH) of gas and the maximum ambient temperature is 50degC (122degF)

7 1 1 Installation position

pu ge 80 mbar(80 hPa32 WC)

VAD VAG VAH VRH VAV

In humid environments black solenoid actuator in the vertical upright position only

VAD VAG VAH VRH black solenoid actuator in the vertical upright position or tilted up to the horizontal not upside downVAG VAH horizontal position only if pu ge 80 mbar (32 WC))VAV installation in the vertical position only black solenoid actuator in the vertical upright positionTo ensure that the airgas ratio control VAG the flow rate regulator VAH VRH or the variable airgas ratio control VAV can react quickly when the load is changed the impulse line for the air control pressure psa and for VAV the impulse line for the combustion chamber control pressure psc should be kept as short as possible The tube internal diameter for the impulse line must always be ge 39 mm (015)

VAH VRHIt is not permitted to install a gas solenoid valve VAS down-stream of flow rate regulator VAH VRH and upstream of fine-adjusting valve VMV The VAS would no longer be able to perform its function as a second safety valve if installed in the above-mentioned position

M

VMV

VAH

VASVAS

pd-

psa-psa

VMV

VAH pd-

psa-psa

The measuring orifice in the air line for impulse lines psa and psa- must always be installed downstream of the air control valve

Project planning information gt Installation

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 36

VAVThe impulse line for the combustion chamber control pres-sure psc must be fitted so that no condensation can enter the pressure regulator but rather flows back into the combustion chamber

7 2 Setting the low-fire rate on VAG VAH VRH VAV

-10 +05-05

ndash

+1

-15

mbar

+15

06

1 152

3

N V

+ +ndash

+30 -15+15

ndash

-3

+5

mbar

-5

N

+

VAG VAH VRH VAV

If the burner operates at low-fire rate the gasair mixture can be changed using the parallel shift of the characteristic curve by turning the adjusting screw ldquoNrdquoAdjusting range at low fire VAG VAH VRH -5 to +5 mbar (-195 to +195 WC) VAV -15 to +15 mbar (-06 to +06 WC)

7 3 Setting the high-fire rate on VAVTo set the high-fire rate the transmission ratio is changed us-ing the adjusting screw ldquoVrdquo until the required flue gas values are achievedTransmission ratio V = pdpsa = 061 to 31The settings N and V can influence each other and must be repeated if necessary

+N+V

-V

-N

VAV

psa [mbar]

p d [m

bar]

7 3 1 CalculationWith no connection to the combustion chamber control pres-sure psc pd = V times psa + NWith connection to the combustion chamber control pressure psc (pd - psc) = V times (psa - psc) + N

Project planning information

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 37

pu pd

21579

4836

085310

189

142

8 Accessories8 1 Gas pressure switch DG VC for VAx VRHType Adjusting range [mbar]DG 17VC 2 to 17DG 40VC 5 to 40DG 110VC 30 to 110DG 300VC 100 to 300

Scope of delivery 1 times pressure switch for gas 2 times retaining screws 2 times sealing rings

8 2 Gas pressure switch DG VCT for VAx T VRH TType Adjusting range [WC]DG 17VCT 08 to 68DG 40VCT 2 to 16DG 110VCT 12 to 44DG 300VCT 40 to 120

Scope of delivery 1 times gas pressure switch with AWG 18 connection wires 2 times retaining screws 2 times sealing ringsMonitoring the inlet pressure pu the electrical plug of the pressure switch for gas points towards the inlet flangeMonitoring the outlet pressure pd the electrical plug of the pressure switch for gas points towards the outlet flange

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 38

A BC

D

FE

ACD

F

B

E

8 3 Bypass valvepilot gas valve VAS 18 3 1 VAS 1 attached to VADVAGVAHVAV 1Scope of delivery A 1 times bypasspilot gas valve VAS 1 B 4 times O-rings C 4 times double nuts D 4 times connection parts E 1 times mounting aidBypass valve VAS 1 F 2 times connection pipes if the bypass valve has a blind flange

at the outlet sidePilot gas valve VAS 1 F 1 times connection pipe 1 times sealing plug if the pilot gas valve

has a threaded flange at the outlet side

Accessories

8 3 2 VAS 1 attached to VADVAGVAHVAV 2 VADVAGVAHVAV 3Scope of delivery A 1 times bypasspilot gas valve VAS 1 B 4 times O-rings C 4 times spacer sleeves D 4 times connection parts E 1 times mounting aidBypass valve VAS 1 F 2 times connection pipes if the bypass valve has a blind flange

at the outlet sidePilot gas valve VAS 1 F 1 times connection pipe 1 times sealing plug if the pilot gas valve

has a threaded flange at the outlet side

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 39

2

3

456

810

20

30

405060

80100

∆p [m

bar]

005 01 02 03 05 08 1 2 3 4 51

3

2

Qn [m3h]

1

01

02

03

0405

08

003

002

6 8 10

005 01 02 03 05 08 1 2 3 4 5003 6 8 10

20

005 01 02 03 05 08 1 2 3 4 5003 6 8 10 20

30

∆p [i

nch

WC]

1

2

3

456

810

20

30

40

04

004

006

00801

02

03

0506

08

Qn [SCFH]10 40 60 100 200 3001 500 10002 3 4 5

120 306 8

21 3 4 5 6 7 8 910

8 3 3 Flow rate

The characteristic flow rate curves have been measured for bypass valve VAS 1 with connection pipe diameter 1 to 10 mm (004 to 04) and for the pilot gas valve with 10 mm (04) connection pipe

Bypass valve connection pipe diameter [mm]

Pilo

t gas

val

ve 1

0 m

m (0

4)

conn

ectio

n pi

pe d

iam

eter

Accessories gt Bypass valvepilot gas valve VAS 1

= natural gas (ρ = 080 kgm3) = propane (ρ = 201 kgm3) = air (ρ = 129 kgm3)

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 40

Accessories

8 4 Bypass valvepilot gas valve VBY 8 for VADVAGVAHVAV 1

B

C

AVBY 8

VAx 1

55

(217)40(157)

70 (276)

80(315)

Rp frac14(pilot gas valve)

For mounting on VAD VAG VAH VAV 1 and double solenoid valve VCD VCG VCH VCV 1

8 4 1 Scope of delivery VBY 8I as bypass valveA 1 times bypass valve VBY 8IB 2 times retaining screws with 4 times O-rings both retaining screws

have a bypass orificeC 1 times grease for o-rings

8 4 2 Scope of delivery VBY 8R as pilot gas valveA 1 times pilot gas valve VBY 8RB 2 times retaining screws with 5 x O-rings one retaining screw

has a bypass orifice (2 x O-rings) the other does not (3 x O-rings)

C 1 times grease for O-rings

8 4 3 SelectionType I R W Q K 6L -R -L E B D 05

VBY 8

Order exampleVBY 8RW6L-LED

8 4 4 Type codeCode DescriptionVBY Gas solenoid valve8 Nominal sizeIR

For internal gas pick-up as bypass valveFor external gas pick-up as pilot gas valve

KQW

Mains voltage 24 V DC Mains voltage 120 V AC 5060 HzMains voltage 230 V AC 5060 Hz

6L Electrical connection via plug and socket with LED-R-L

Attachment side of main valve right-hand sideAttachment side of main valve left-hand side

EB

Attached to the VAxEnclosed (separate packing unit)

05D

Nozzle diameter = 05 mm (002)Flow adjustment

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 41

2

01

02

03

05

081

3

456

810

20

30

405060

80100

∆p [m

bar]

1

3

201 02 03 05 1 2 3001 003 4

Qn [m3h]

02 03 05 1 2

01 02 05

002 006

002

002 006 1

0010006 005 01

001

0003

0006 2 3

VBY 8DVBY 805

∆p [i

nch

WC]

1

2

3

456

810

20

30

40

040506

08

1

Qn [SCFH]10 40 60 1005 2081 2 30402

01

02

03

004005006

008

Adjusting range

8 4 5 Flow rateVBY 8 D

+

-

The flow rate can be set by turning the flow rate restrictor (4 mm016 Allen screw) frac14 of a turn Flow rate 10 to 100

VBY 8 05The flow is routed through a 05 mm (002) nozzle and thus has a fixed characteristic flow rate curve Adjustment is not possible

8 4 6 Technical dataInlet pressure pu max 500 mbar (7 psig)Ambient temperature 0 to +60degC (32 to 140degF) no condensation permittedStorage temperature 0 to +40degC (32 to 104degF) no condensation permittedPower consumption 24 V = 8 W 120 V = 8 W 230 V = 95 WEnclosure IP 54

Accessories gt Bypass valvepilot gas valve VBY 8 for VADVAGVAHVAV 1

= natural gas (ρ = 080 kgm3) = propane (ρ = 201 kgm3) = air (ρ = 129 kgm3)

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 42

TC 116VB C

56(22)

49(193)

27(106)

A

A

VCx 1 VCx 2VCx 3

8 5 Tightness control TC 116Vfor VAx 1 ndash 3An adapter plate is required to attach the tightness control to the right- or left-hand side of the pressure regulator with gas solenoid valveScope of delivery A 1 times adapter plate B 2 times O-rings C 2 times retaining screwsFor attachment to left-hand side Order No 74922391 right-hand side Order No 74921995

8 6 Pressure test pointsTest points to check the inlet pressure pu and outlet pressure pdScope of delivery 1 x pressure test points with 1 x profiled sealing rings Order No 74923390

8 7 Cable gland setWhen wiring a double solenoid valve with pressure regula-tor VCx the connection boxes are to be connected using a cable gland setThe cable gland set can only be used if the connection boxes are at the same height and on the same side and if both valves are equipped either with or without a proof of closure switchVA 1 Order No 74921985 VA 2 Order No 74921986 VA 3 Order No 74921987

Accessories

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 43

A B

D

C

Accessories

8 9 Differential pressure orifice

Size PipeDN

Differential pressure orifi cewith outlet dia

1 15 17 mm 0671 20 25 mm 0981 25 30 mm 1182 40 46 mm 1813 50 58 mm 228

If pressure regulator VADVAGVAV 1 is retrofitted upstream of gas solenoid valve VAS 1 a DN 25 differential pressure orifice with outlet opening d = 30 mm (118) must be inserted at the outlet of the pressure regulatorIn the case of pressure regulator VAx 115 or VAx 120 the DN 25 differential pressure orifice must be ordered separately and retrofitted Order No 74922240

8 8 Seal set VA 1 ndash 3VA 1 Order No 74921988 VA 2 Order No 74921989 VA 3 Order No 74921990Scope of deliveryA 1 times double block seal B 2 times O-rings (flange) C 2 times O-rings (pressure switch) for pressure test pointscrew plug D 2 times sealing rings (flat sealing) and 2 times profiled sealing rings

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 44

BA

C

pd-

8 11 Attachment blockFor locked installation of pressure gauge and other acces-soriesScope of delivery A 1 times attachment block B 2 times self-tapping screws for installation C 2 times O-rings

Accessories

8 10 Retaining frameIn the event that a pressure regulator VAx is installed at a later point upstream of a gas solenoid valve VAS a measur-ing orifice VMO or a fine-adjusting valve VMV the retaining frame must be fitted at the inlet of the second device in order to fasten the differential pressure orifice at the regulator outlet Order the retaining frame separatelyRetaining frame for Size 1 Order No 74923029 Size 2 Order No 74923030 Size 3 Order No 74923031

8 12 Gas control lineFine-adjusting valve VMV can be installed on the flow rate regulator VAH for fine adjustment of the gas flow rateThe gas control line for gas outlet pressure pd- is available with 2 18 compression fittingsSize 1 Order No 74924458 Size 2 Order No 74924459

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 45

8 13 Measuring orifice VMOThe measuring orifice VMO is designed to reduce the gas and air flow rates and is installed downstream of the valVario control The measuring orifice is available with Rp internal thread (NPT internal thread) or flange to ISO 7005See wwwdocuthekcom Elster Kromschroumlder Krom-schroumlder LBE Products 03 Valves and butterfly valves valVario accessories Type of document Technical Informa-tion VMO

Accessories

8 14 Filter module VMFUsing the filter module VMF the gas flow upstream of the gas solenoid valve VAS and the airgas ratio control is cleaned The filter module is available with Rp internal thread (NPT internal thread) or flange to ISO 7005 and can also be supplied with fitted pressure switch as an optionSee wwwdocuthekcom Elster Kromschroumlder Krom-schroumlder LBE Products 03 Valves and butterfly valves valVario accessories Type of document Technical Informa-tion VMF

8 15 Fine-adjusting valve VMVThe flow rate is set using the fine-adjusting valve VMV The fine-adjusting valve is available with Rp internal thread (NPT internal thread) or flange to ISO 7005See wwwdocuthekcom Elster Kromschroumlder Krom-schroumlder LBE Products 03 Valves and butterfly valves valVario accessories Type of document Technical Infor-mation VMV

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 46

9 Technical dataGas types natural gas LPG (gaseous) biologically produced methane (max 01 -by-vol H2S) or clean air other gases on request The gas must be clean and dry in all temperature conditions and must not contain condensateCE and FM approved UL listed max inlet pressure pu 10 ndash 500 mbar (4 ndash 200 WC) FM approved (230 V AC 120 V AC 24 V DC) non opera-tional pressure 700 mbar (10 psig)ANSICSA approved (230 V AC 120 V AC 24 V DC) up to 350 mbar (5 psig)Opening time of the solenoid valve quick opening le 05 s Closing time quick closing lt 1 sMedium and ambient temperatures -20 to +60degC (-4 to +140degF) no condensation permittedStorage temperature -20 to +40degC (-4 to +104degF)Enclosure IP 65Valve housing aluminium valve seal NBRConnection flanges with internal thread Rp to ISO 7-1 NPT to ANSIASMESafety valve Class A to EN 161 Factory Mutual Research Class 7400 Process Control Valves (230 V AC 120 V AC 24 V DC) ANSI Z2121 and CSA 65 ANSI Z2118 and CSA 63Control class A to EN 88-1Control range up to 101

Mains voltage 230 V AC +10-15 5060 Hz 200 V AC +10-15 5060 Hz 120 V AC +10-15 5060 Hz 100 V AC +10-15 5060 Hz 24 V DC plusmn20Duty cycle 100Power factor of the solenoid coil cos φ = 09Power consumption

Type Voltage Power

VAx 1

24 V DC 25 W ndash100 V AC 25 W (26 VA)120 V AC 25 W (26 VA)200 V AC 25 W (26 VA)230 V AC 25 W (26 VA)

VAx 2 VAx 3

24 V DC 36 W ndash100 V AC 36 W (40 VA)120 V AC 40 W (44 VA)200 V AC 40 W (44 VA)230 V AC 40 W (44 VA)

VBY24 V DC 8 W ndash

120 V AC 8 W ndash230 V AC 95 W ndash

Cable gland M20 times 15Electrical connection cable with max 25 mm2 (AWG 12) or plug with socket to EN 175301-803

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 47

Position indicator contact rating

Type Voltage Min current(resistive load)

Max current(resistive load)

VAxS VCxS 12 ndash 250 V AC 5060 Hz 100 mA 3 AVAxG VCxG 12 ndash 30 V DC 2 mA 01 A

Position indicator switching frequency max 5 times per minute

Switching current [A]

Switching cyclescos φ = 1 cos φ = 06

01 500000 50000005 300000 250000

1 200000 1000003 100000 ndash

Limited to max 200000 cycles for heating systems

9 1 VADOutlet pressure pd VAD-25 25 ndash 25 mbar (1 ndash 10 WC) VAD-50 20 ndash 50 mbar (8 ndash 20 WC) VAD-100 35 ndash 100 mbar (14 ndash 40 WC)Combustion chamber control pressure psc (connection psa)

-20 to +20 mbar (-78 to +78 WC)

VAD

pu

pd

(psa)

9 2 VAGOutlet pressure pd 05 ndash 100 mbar (02 ndash 40 WC)Air control pressure psa 05 ndash 100 mbar (02 ndash 40 WC)

Adjusting range at low fire plusmn5 mbar (plusmn2 WC)Transmission ratio of gas to air 11The inlet pressure must always be higher than the air control pressure psa + pressure loss ∆p + 5 mbar (2 WC)

VAGpd

pu

psa

psa

VAGK 1 x 18 coupling for plastic hose (internal dia 39 mm (015) external dia 61 mm (024)) or VAGE 1 x 18 compression fitting for 6 times 1 tube or VAGA 1 x NPT 18 adapter or VAGN zero governor with breathing orifice

9 3 VAH VRHAir control pressure psa 06 ndash 100 mbar (024 ndash 40 WC) Differential air pressure ∆psa (psa - psa-) 06 ndash 50 mbar (024 ndash 197 WC) Differential gas pressure ∆pd (pd - pd-) 06 ndash 50 mbar (024 ndash 197 WC)Transmission ratio of gas to air 11The inlet pressure must always be higher than the differen-tial air pressure ∆psa + pressure loss ∆p + max gas pres-sure on burner + 5 mbar (2 WC)Adjusting range at low fire plusmn5 mbar (plusmn2 WC)

Technical data

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 48

VAHVRH

pd-

pu

psa-

psa

Connection of the air control pressure psaVAHE VRHE 3 x 18 compression fitting for 6 times 1 tube or VAHA VRHA 3 x NPT 18 adapter

9 4 VAVOutlet pressure pd 05 ndash 30 mbar (02 ndash 117 WC)Air control pressure psa 04 ndash 30 mbar (015 ndash 117 WC)Combustion chamber control pressure psc

-20 to +20 mbar (-78 to +78 WC)Min control pressure differential psa - psc 04 mbar (015 WC)Min pressure differential pd - psc 05 mbar (02 WC)Adjusting range at low fire plusmn15 mbar (plusmn06 WC)Transmission ratio of gas to air 061 to 31The inlet pressure pu must always be higher than the air control pressure psa times transmission ratio V + pressure loss ∆p + 15 mbar (06 WC)

pu

pd psapsc

VAV

VAVK 2 x plastic hose couplings (internal dia 39 mm (015) external dia 61 mm (024)) or VAVE 2 x 18 compression fitting for 6 times 1 tube or VAVA 2 x NPT 18 adapter

Technical data

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 49

9 5 Safety-specific characteristic values for VAx 1 ndash 3For SILSuitable for Safety Integrity Level SIL 1 2 3

Diagnostic coverage DC 0

Type of subsystem Type A to EN 61508-2 74312

Operating mode High demand mode pursu-ant to EN 61508-4 3512

For PLSuitable for Performance Level PL a b c d e

Category B 1 2 3 4Common cause failure CCF gt 65Application of essential safety requirements Satisfied

Application of tried-and-tested safety requirements Satisfied

For SIL and PL

B10d value

Operating cyclesVAD VAG VAV VAH 1 10094360VAD VAG VAV VAH 2 8229021VAD VAG VAV VAH 3 6363683

Hardware fault tolerance (1 valve) HFT 0

Hardware fault tolerance (2 valves) HFT 1

Safe failure fraction SFF gt 90Fraction of undetected com-mon cause failures β ge 2

Max service life under operating conditions10 years after date of production plus max 12 year in stor-age prior to first use or once the given number of operating cycles has been reached depending on which is achieved firstThe devices are suitable for single-channel systems (HFT = 0) up to SIL 2PL d and up to SIL 3PL e when two re-dundant valves are installed in a double-channel architecture (HFT = 1) provided that the complete system complies with the requirements of EN 61508ISO 13849

For a glossary of terms see page 53 (Glossary)

Technical data

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 50

nop 1hnop 1a

sB10d

T10d aPFHD (1 VAx) 1h

PFHD (2 VAx) 1h

PFDavg (1 VAx)

PFDavg (2 VAx)

Technical data gt Safety-specific characteristic values for VAx 1 ndash 3

9 5 1 Determining the PFHD value the λD value and the MTTFd value

PFHD = λD = x nop= 1MTTFd

01B10d

PFDavg = x λD x 24 x 365 x T10d 12

Type

Cycle time

suitable for

suitable for

PFHD = Probability of dangerous failure (HDM = high de-mand mode) [1hour]PFDavg = Average probability of dangerous failure on de-mand (LDM = low demand mode)λD = Mean dangerous failure rate [1hour]MTTFd = Mean time to dangerous failure [hours]nop = Demand rate (mean number of annual operations) [1hour]

9 5 2 Calculating the PFHD and PFDavg

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 51

VAD VAG VAH VAV

H1

Rp frac14(NPT frac14)

H2

E

LF

F

H4

H3

B

VAxS VAxF

L2G

G

Technical data

9 6 Dimensions

Type

Connec-tion Dimensions

WeightRpNPT DN

L L2 E F G H1 H2 H3 H4 Bmm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch kg lbs

VAx 115 12 15 75 29 ndash ndash 75 29 15 06 ndash ndash 143 56 82 32 161 63 117 46 97 38 18 40VAH 115 12 15 75 29 ndash ndash 75 29 15 06 ndash ndash 143 56 100 39 161 63 135 53 97 38 2 44VAx 120 34 20 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 82 33 161 63 117 46 97 38 19 42VAH 120 34 20 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 100 39 161 63 135 53 97 38 21 46VAx 125 1 25 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 82 33 161 63 117 46 97 38 19 42VAH 125 1 25 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 100 39 161 63 135 53 97 38 21 46VAx 240 112 40 128 50 200 79 85 33 29 11 66 26 170 67 112 44 191 75 162 64 125 49 44 97VAH 240 112 40 128 50 200 79 85 33 29 11 66 26 170 67 132 52 191 75 182 72 125 49 47 104VAx 350 2 50 155 61 230 91 85 33 36 14 74 29 180 70 135 53 201 79 196 77 160 63 61 134VAH 350 2 50 155 61 230 91 85 33 36 14 74 29 180 70 156 61 201 79 217 85 160 63 64 141

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 52

10 Converting unitssee wwwadlatusorg

11 Maintenance cyclesAt least once per annum at least twice per annum for biologi-cally produced methaneIf the flow rate drops clean the strainer

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 53

12 Glossary12 1 Diagnostic coverage DCMeasure of the effectiveness of diagnostics which may be determined as the ratio between the failure rate of detected dangerous failures and the failure rate of total dangerous failuresNOTE Diagnostic coverage can exist for the whole or parts of a safety-related system For example diagnostic cover-age could exist for sensors andor logic system andor final elements Unit see EN ISO 13849-12008

12 2 Mode of operationHigh demand mode or continuous modeOperating mode where the frequency of demands for opera-tion made on a safety-related system is greater than one per year or greater than twice the proof-test frequencysee EN 61508-42008

12 3 CategoryClassification of the safety-related parts of a control system in respect of their resistance to faults and their subsequent behaviour in the fault condition and which is achieved by the structural arrangement of the parts fault detection andor by their reliability see EN ISO 13849-12008

12 4 Common cause failure CCFFailures of different items resulting from a single event where these failures are not consequences of each othersee EN ISO 13849-12008

12 5 Fraction of undetected common cause failures β Fraction of undetected failures of redundant components due to a single event whereby these failures are not based on mutual causesNOTE β is expressed as a fraction in the equations and as a percentage elsewheresee EN 61508-62010

12 6 B10d valueMean number of cycles until 10 of the components fail dan-gerouslysee EN ISO 13849-12008

12 7 T10d valueMean time until 10 of the components fail dangerouslysee EN ISO 13849-12008

12 8 Hardware fault tolerance HFTA hardware fault tolerance of N means that N + 1 is the mini-mum number of faults that could cause a loss of the safety functionsee IEC 61508-22010

12 9 Mean dangerous failure rate λD Mean rate of dangerous failures during operation time (T10d) Unit 1hsee EN ISO 13849-12008

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 54

12 10 Safe failure fraction SFFFraction of safe failures related to all failures which are as-sumed to appearsee EN 13611A22011

12 11 Probability of dangerous failure PFHD Value describing the likelihood of dangerous failure per hour of a component for high demand mode or continuous mode Unit 1hsee EN 13611A22011

12 12 Mean time to dangerous failure MTTFd Expectation of the mean time to dangerous failuresee EN ISO 13849-12008

12 13 Demand rate nop Mean number of annual operationssee EN ISO 13849-12008

12 14 Average probability of dangerous failure on demand PFDavg (LDM = 1 ndash 10 switching cyclesyear)Average probability of a dangerous failure of the safety function on demand (LDM = low demand mode)see EN 61508-6

Glossary

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415

Finally we are offering you the opportunity to assess this ldquoTechnical Information (TI)rdquo and to give us your opinion so that we can improve our documents further and suit them to your needs

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ComprehensionCoherentToo complicatedNo answer

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No answer

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Remarks

(Adobe Reader 7 or higher required) wwwadobecom

Elster GmbH Postfach 2809 middot 49018 Osnabruumlck Strotheweg 1 middot 49504 Lotte (Buumlren) GermanyT +49 541 1214-0 F +49 541 1214-370 infokromschroedercomwwwkromschroedercom

The current addresses of our international agents are available on the Internetwwwkromschroederdeindexphpid=718ampL=1

We reserve the right to make technical modifications in the interests of progressCopyright copy 2015 Elster GmbH All rights reserved

Contact

Feedback

0325

0530

  • Pressure regulators with solenoid valve VAD VAG VAV VAH
  • Flow rate regulator VRH
  • Pressure regulators with double solenoid valve VCD VCG VCV VCH
  • Contents
  • 1 Application
    • 11 Examples of application
      • 111 Constant pressure control
      • 112 Constant pressure control with two gas solenoid valves
      • 113 Constant pressure control with max pressure switch
      • 114 Constant pressure control with non-controlled pilot gas outlet
      • 115 Modulating control
      • 116 Modulating control with two gas solenoid valves
      • 117 Modulating control with two gas solenoid valves and inlet pressure switch
      • 118 HighLow control
      • 119 Zero pressure control
      • 1110 Staged flow rate control
      • 1111 Continuous or staged flow rate control
      • 1112 Modulating control with variable airgas ratio control with gas solenoid valve
      • 1113 Modulating control in residential heat generation
          • 2 Certification
          • 3 Function
            • 31 VAD VAG VAH VRH VAV
              • 311 Pressure regulator for gas VAD
              • 312 Airgas ratio control VAG
              • 313 Flow rate regulators VAH VRH
              • 314 Variable airgas ratio control VAV
              • 315 Pressure regulator with gas solenoid valve VAxS position indicator with visual indicator
                • 32 Animation
                • 33 Connection diagram
                  • 331 VAx with M20 cable gland
                  • 332 VAx with plug
                  • 333 VAS with VADVAGVAHVAV with M20 cable gland
                  • 334 VAS with VADVAGVAHVAV with plug
                      • 4 Replacement possibilities for MODULINE pressure regulators with gas solenoid valve
                        • 41 GVS GVI GVIB GVR and GVRH are to be replaced by VAD VAG VAG+VAS VAH and VAV
                          • 5 Flow rate
                            • 51 Selection example for VAD
                              • 511 Calculate VAD
                                • 52 Selection example for VAG VAH VRH VAV
                                  • 521 CalculateVAG VxHVAV
                                    • 53 Selection example for zero governor VAGN
                                      • 531 Calculate VAGN
                                          • 6 Selection
                                            • 61 Selection table for pressure regulator with solenoid valve VAD
                                            • 62 Type code for VAD
                                            • 63 Selection table for airgas ratio control with solenoid valve VAG flow rate regulators VAH VRH
                                            • 64 Type code for VAG VAH VRH
                                            • 65 Selection table for variable airgas ratio control with solenoid valve VAV
                                            • 66 Type code for VAV
                                            • 67 Accessories
                                              • 7 Project planning information
                                                • 71 Installation
                                                  • 711 Installation position
                                                    • 72 Setting the low-fire rate on VAG VAH VRH VAV
                                                    • 73 Setting the high-fire rate on VAV
                                                      • 731 Calculation
                                                          • 8 Accessories
                                                            • 81 Gas pressure switch DGVC for VAx VRH
                                                            • 82 Gas pressure switch DGVCT for VAxT VRHT
                                                            • 83 Bypass valvepilot gas valve VAS 1
                                                              • 831 VAS 1 attached to VADVAGVAHVAV 1
                                                              • 832 VAS 1 attached to VADVAGVAHVAV 2 VADVAGVAHVAV 3
                                                              • 833 Flow rate
                                                                • 84 Bypass valvepilot gas valve VBY 8 for VADVAGVAHVAV 1
                                                                  • 841 Scope of delivery VBY 8I as bypass valve
                                                                  • 842 Scope of delivery VBY 8R as pilot gas valve
                                                                  • 843 Selection
                                                                  • 844 Type code
                                                                  • 845 Flow rate
                                                                  • 846 Technical data
                                                                    • 85 Tightness control TC 116V
                                                                    • 86 Pressure test points
                                                                    • 87 Cable gland set
                                                                    • 88 Seal set VA 1thinspndashthinsp3
                                                                    • 89 Differential pressure orifice
                                                                    • 810 Retaining frame
                                                                    • 811 Attachment block
                                                                    • 812 Gas control line
                                                                    • 813 Measuring orifice VMO
                                                                    • 814 Filter module VMF
                                                                    • 815 Fine-adjusting valve VMV
                                                                      • 9 Technical data
                                                                        • 91 VAD
                                                                        • 92 VAG
                                                                        • 93 VAH VRH
                                                                        • 94 VAV
                                                                        • 95 Safety-specific characteristic values for VAx 1thinspndashthinsp3
                                                                          • 951 Determining the PFHD value the λD value and the MTTFd value
                                                                          • 952 Calculating the PFHD and PFDavg
                                                                            • 96 Dimensions
                                                                              • 10 Converting units
                                                                              • 11 Maintenance cycles
                                                                              • 12 Glossary
                                                                                • 121 Diagnostic coverage DC
                                                                                • 122 Mode of operation
                                                                                • 123 Category
                                                                                • 124 Common cause failure CCF
                                                                                • 125 Fraction of undetected common cause failures β
                                                                                • 126 B10d value
                                                                                • 127 T10d value
                                                                                • 128 Hardware fault tolerance HFT
                                                                                • 129 Mean dangerous failure rate λD
                                                                                • 1210 Safe failure fraction SFF
                                                                                • 1211 Probability of dangerous failure PFHD
                                                                                • 1212 Mean time to dangerous failure MTTFd
                                                                                • 1213 Demand rate nop
                                                                                • 1214 Average probability of dangerous failure on demand PFDavg
                                                                                  • Feedback
                                                                                  • Contact
                                                                                      1. naechste_Seite 24
                                                                                      2. naechste Seite 18
                                                                                      3. naechste Seite 6
                                                                                      4. naechste Seite 16
                                                                                      5. naechste Seite 14
                                                                                      6. naechste Seite 25
                                                                                      7. naechste_Seite 11
                                                                                      8. naechste_Seite 17
                                                                                      9. fbArbeitspunkt_Min Ja
                                                                                      10. fbArbeitspunkt Ja
                                                                                      11. ftProgramm Standard-Programm
                                                                                      12. fz_kv
                                                                                      13. fz_pe 80
                                                                                      14. fz_pG 60
                                                                                      15. fzDelta_p_Soll 20
                                                                                      16. ftEinheit_Druck mbar
                                                                                      17. fatTyp [115]
                                                                                      18. fbArbeitspunkt_Min_2 Ja
                                                                                      19. fbArbeitspunkt_2 Ja
                                                                                      20. ftRegler_Typ VAG
                                                                                      21. ftProgramm_2 Standard-Programm
                                                                                      22. fz_kv_2
                                                                                      23. fatMedium [08]
                                                                                      24. fzDichte 08
                                                                                      25. ftEinheit_Dichte kgm3
                                                                                      26. fzV_Norm 30
                                                                                      27. ftEinheit_Volstrom m3h
                                                                                      28. fz_pe_2 80
                                                                                      29. fz_pG_2 60
                                                                                      30. fzDelta_p_Soll_2 20
                                                                                      31. ftEinheit_Druck2 [mbar]
                                                                                      32. ftEinheit_Geschw [ms]
                                                                                      33. fatTyp_2 [10954451150103322]
                                                                                      34. fbArbeitspunkt_Min_3 Ja
                                                                                      35. fbArbeitspunkt_3 Ja
                                                                                      36. ftProgramm_3 Standard-Programm
                                                                                      37. fz_kv_3
                                                                                      38. fz_pe_3 20
                                                                                      39. fz_pG_3 0
                                                                                      40. fzDelta_p_Soll_3 20
                                                                                      41. fatTyp_3 [123]
                                                                                      42. fatSchaltleistung [6363683]
                                                                                      43. fz_nop_Stunde 1
                                                                                      44. fz_nop_Jahr 8760
                                                                                      45. fzZyklus 3600
                                                                                      46. fzB10d 6363683
                                                                                      47. fzT10d 10
                                                                                      48. fzPFHd_1V 15714170551864384e-8
                                                                                      49. fzPFDavg_1V
                                                                                      50. ftGeeignet_1V PL d SIL 2
                                                                                      51. fzPFHd_2V 33505832253532625e-10
                                                                                      52. fzPFDavg_2V
                                                                                      53. ftGeeignet_2V PL e SIL 3
                                                                                      54. ftUebersicht Off
                                                                                      55. ftVerstaendlichkeit Off
                                                                                      56. ftFehlende_Info
                                                                                      57. ftUmfang Off
                                                                                      58. ftVerwendung_1 Off
                                                                                      59. ftVerwendung_2 Off
                                                                                      60. ftVerwendung_3 Off
                                                                                      61. ftVerwendung_4 Off
                                                                                      62. ftNavigation Off
                                                                                      63. ftTaetigkeitsbereich Off
                                                                                      64. ftBemerkung
                                                                                      65. Michael Rehkamp Elster Kromschroumlder>btnSenden
Page 25: VAD, VAG, VAV, VAH, VRH, VCD, VCG, VCV, VCH · PDF fileVAD, VAG, VAH, VAV, VRH, VCD, VCG, VCV, VCH · Edition 04.15 6 VAD VAD VAS 1 .1 Examples of application 1 .1 .1 Constant pressure

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 25

∆p [i

nch

WC]

Qn [SCFH]100 400 600 4000 60001000 200020 30 40 50 200 3006015 80

1

08

1

2

3

4

56

8

10

20

30

40

5060

80

100

200

∆p [m

bar]

5

8

3

20

10

30

40

80

60

300

400

50

04 06 1 2 3 4 5 808 10 20 30 402

03 60 100 200

100

200

500

1

3

2

04 06 08 1 2 3 4 5 6 8 10 20 30 40

04 06 08 1 2 3 4 5 6 8 10

200

80 10020 3003

03Qn [m3h]

02

50 60 80 100

40 50 60

= pd min lt 5 mbar

VAG

VxH

VAV

115

BVA

GV

xHV

AV 12

0A

VAG

VxH

VAV

125

A

P1

P2

VAG

VxH

VAV

240

AVA

GV

xHV

AV 3

50A

= natural gas (ρ = 080 kgm3) = propane (ρ = 201 kgm3) = air (ρ = 129 kgm3)

The characteristic flow rate curves have been meas-ured with the specified flanges and a fitted strainer If two or more valves are combined the pressure loss of each additional valve drops by approx 5

5 2 Selection example for VAG VAH VRH VAV Natural gas Flow rate Qmax = 30 m3h Inlet pressure pu = 80 mbar Outlet pressure pd max VAG = 60 mbarThe desired control ratio from high-fire to low-fire rate is RV = 101High fire ∆p = pu - pd max = 20 mbar Point P1Low fire pd min = pd max RV2 = 06 mbar Qmin = Qmax RV = 3 m3h ∆p = pu - pd min = 794 mbar Point P2 select VAG 120APoint P1 and point P2 must be within the working range of a unit size We recommend that you select the smallest size to achieve the best control properties

metric imperial

Enter densityFlow rate Qn

Inlet pressure pu

Outlet pressure pd

Product RV v

5 2 1 Calculate VAG VxH VAV

Pressure loss ∆p

∆pmin

Flow rate

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 26

∆p [i

nch

WC]

Qn [SCFH]100 400 600 4000 60001000 200020 30 40 50 200 3006015 80

1

08

1

2

3

4

56

8

10

20

30

40

5060

80

100

200

∆p [m

bar]

5

8

3

20

10

30

40

80

60

300

400

50

04 06 2 3 4 5 808 10 20 30 402

03 60 100 200

100

200

500

1

3

2

04 06 08 1 2 3 4 5 6 8 10 20 30 40

04 06 08 1 2 3 4 5 6 8 10

200

80 10020 3003

03Qn [m3h]

02

50 60 80 100

40 50 60

VAG

115

N

P1VAG

125

N

VAG

120

N

VAG

240

NP2

VAG

350

N

= natural gas (ρ = 080 kgm3) = propane (ρ = 201 kgm3) = air (ρ = 129 kgm3)

The characteristic flow rate curves have been meas-ured with the specified flanges and a fitted strainer If two or more valves are combined the pressure loss of each additional valve drops by approx 5

5 3 Selection example for zero governor VAG NNatural gas Flow rate Qmax = 30 m3h Inlet pressure pu = 20 mbar Outlet pressure pd = 0 mbar (atmospheric pressure)The desired control ratio from high-fire to low-fire rate is RV = 101High fire ∆p = pu - pd max = 20 mbar Point P1Low fire Point P2 Qmin = 24 m3h at ∆p = 20 mbar RV = Qmax Qmin = 1231Point P1 and point P2 must be within the working range of a unit size We recommend that you select the smallest size to achieve the best control properties

metric imperial

Enter densityFlow rate Qn

Inlet pressure pu

Outlet pressure pd

Product RV

5 3 1 Calculate VAG N

Pressure loss ∆p

∆pmin

Flow rate

v

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 27

6 Selection6 1 Selection table for pressure regulator with solenoid valve VAD

Accessories right Accessories left

Type1) T R N F N K P Q Y W S2) G2) R2) L2) M20

cab

le g

land

Plug

with

soc

ket

Plug

with

out s

ocke

t

-25-50 -100 A B Scre

w p

lug

Pres

sure

test

poi

nt

DG

17V

C 3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

Scre

w p

lug

Pres

sure

test

poi

nt

DG

17V

C 3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

VAD 115

VAD 120

VAD 125

VAD 240

VAD 350

= standard = available1) The following nominal inlet fl ange diameters are also available size 1 with nominal diameter DN 10 size 2 with nominal diameters DN 25 DN 32 and DN 50 size 3 with nominal diameters DN 40 and DN 652) Position indicator and bypasspilot gas valve cannot be fi tted together on the same side3) Specify the test point for inlet pressure pu or outlet pressure pdHelp for selecting the pressure regulator VAD can be found on the ProFi DVD wwwkromschroedercom Products DVD Product fi nder ldquoProFirdquo

Order exampleVAD 240RNW-100A

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 28

Selection

6 2 Type code for VADCode DescriptionVAD Pressure regulator with solenoid valve1 ndash 3 SizeT T-product10 ndash 65 Nominal inlet and outlet diameterRNF

Rp internal threadNPT internal thread

ISO fl angeN Quick opening quick closingKPQYW

Mains voltage 24 V DCMains voltage 100 V AC 5060 HzMains voltage 120 V AC 5060 HzMains voltage 200 V AC 5060 HzMains voltage 230 V AC 5060 Hz

SG

Position indicator with visual indicatorPosition indicator for 24 V with visual indicator

RL

Viewed from the right (in the direction of fl ow)Viewed from the left (in the direction of fl ow)

-25-50-100

Outlet pressure pd 25 ndash 25 mbar20 ndash 50 mbar

35 ndash 100 mbarAB

Standard valve seatReduced valve seat

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 29

Selection

6 3 Selection table for airgas ratio control with solenoid valve VAG flow rate regulators VAH VRH

Type1) T R N F N K P Q Y W S2) G2) R2) L2) M20

cab

le g

land

Plug

with

soc

ket

Plug

with

out s

ocke

t

A B E K A N Scre

w p

lug

Pres

sure

test

poi

ntD

G 1

7VC

3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

Scre

w p

lug

Pres

sure

test

poi

ntD

G 1

7VC

3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

VAG 115 VAG 120 VAG 125 VAG 240 VAG 350

VAH 115 VAH 120 VAH 125 VAH 240 VAH 350

VRH 115 VRH 120 VRH 125 VRH 240 VRH 350

= standard = available1) The following nominal inlet fl ange diameters are also available size 1 with nominal diameter DN 10 size 2 with nominal di-

ameters DN 25 DN 32 and DN 50 size 3 with nominal diameters DN 40 and DN 652) Position indicator and bypasspilot gas valve cannot be fi tted together on the same side3) Specify the test point for inlet pressure pu or outlet pressure pdHelp for selecting the regulators can be found on the ProFi DVD wwwkromschroedercom Products DVD Product fi nder ldquoProFirdquo

Order exampleVAG 240RNWAE

Accessories right Accessories left

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 30

Selection

6 4 Type code for VAG VAH VRHCode DescriptionVAGVAHVRH

Airgas ratio control with solenoid valveFlow rate regulator with solenoid valve

Flow rate regulator1 ndash 3 SizeT T-product15 ndash 50 Nominal inlet and outlet diameterRNF

Rp internal threadNPT internal thread

ISO fl angeN1) Quick opening quick closingK1)

P1)

Q1)

Y1)

W1)

Mains voltage 24 V DCMains voltage 100 V AC 5060 HzMains voltage 120 V AC 5060 HzMains voltage 200 V AC 5060 HzMains voltage 230 V AC 5060 Hz

S1)

G1)Position indicator with visual indicator

Position indicator for 24 V with visual indicatorRL

Viewed from the right (in the direction of fl ow)Viewed from the left (in the direction of fl ow)

AB

Standard valve seatReduced valve seat

EKAN

Connection kit for air control pressure psaVAG VAH VRH compression fi tting

VAG plastic hose couplingVAG VAH VRH NPT 18 adapter

VAG zero governor1) Only available for VAG VAV VAH

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 31

6 5 Selection table for variable airgas ratio control with solenoid valve VAVAccessories right Accessories left

Type1) T R N F N K P Q Y W S2) G2) R2) L2) M20

cab

le g

land

Plug

with

soc

ket

Plug

with

out s

ocke

t

A B E K A Scre

w p

lug

Pres

sure

test

poi

ntD

G 1

7VC

3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

Scre

w p

lug

Pres

sure

test

poi

ntD

G 1

7VC

3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

VAV 115

VAV 120

VAV 125

VAV 240

VAV 350

= standard = available1) The following nominal inlet fl ange diameters are also available size 1 with nominal diameter DN 10 size 2 with nominal diameters DN 25 DN 32 and DN 50 size 3 with nominal diameters DN 40 and DN 652) Position indicator and bypasspilot gas valve cannot be fi tted together on the same side3) Specify the test point for inlet pressure pu or outlet pressure pdHelp for selecting the variable airgas ratio control VAV can be found on the ProFi DVD wwwkromschroedercom

Products DVD Product fi nder ldquoProFirdquo

Order exampleVAV 240RNWAK

Selection

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 32

Selection

6 6 Type code for VAVCode DescriptionVAV Variable airgas ratio control with solenoid valve1 ndash 3 SizeT T-product15 ndash 50 Nominal inlet and outlet diameterRNF

Rp internal threadNPT internal thread

ISO fl angeN Quick opening quick closingKPQYW

Mains voltage 24 V DCMains voltage 100 V AC 5060 HzMains voltage 120 V AC 5060 HzMains voltage 200 V AC 5060 HzMains voltage 230 V AC 5060 Hz

SG

Position indicator with visual indicatorPosition indicator for 24 V with visual indicator

RL

Viewed from the right (in the direction of fl ow)Viewed from the left (in the direction of fl ow)

AB

Standard valve seatReduced valve seat

EKA

Connection kit for air control pressure psa and combus-tion chamber control pressure psc

compression fi ttingplastic hose coupling

NPT 18 adapter

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 33

Selection

6 7 AccessoriesModularly configurable withndash Screw plugsndash Pressure test pointsndash Pressure switch DGVC for inlet

andor outlet pressurendash Tightness control TCndash Bypasspilot gas valve VBY 8 for

size 1ndash Bypasspilot gas valve VAS 1For further information see page 37 (Accessories)

Position indicator

Plug with socket

Plug

Screwplugs

Pressuretest points

Pressure switch DGC Tightness

control TC

Bypasspilot gas valve VBY 8 for size 1

Bypasspilot gas valve VAS 1

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 34

7 Project planning informationDo not store or install the unit in the open airThe inlet pressure pu and the outlet pressure pd can be meas-ured on both sides of the valve body To increase the control accuracy an external impulse line can be connected instead of the pressure test point pd

VAD

pu

pd

(psa)

VAGpd

pu

psa

psa

VAD measurement point for the gas outlet pressure pd on the regulator body A combustion chamber control line (psc) can be connected to connection psa for maintaining a constant burner capacityVAG additional measurement point for the air control pressure psa on the regulator body

VAV

psapsc

pu

pd

VAH VRH

pu

pd-

pdpsa-

psa

VAV measurement point for the outlet pressure pd on the regulator bodyVAH additional measurement points for the outlet pressure pd- and the air control pressure psapsa- on the regulator body

7 1 Installation

GFK

VAGVAH

GFKVAD

Sealing material and thread cuttings must not be allowed to get into the valve housing Install a filter upstream of every system

gt20 mmgt0 79

The unit must not be in contact with masonry Minimum clear-ance 20 mm (079 inches)Ensure that there is sufficient space for installation and ad-justment

le +100 degCle +212 degF

The solenoid body heats up during operation ndash depending on ambient temperature (max 60degC140degF) and intrinsic heating (approx 40degC104degF)

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 35

In the case of double solenoid valves the position of the con-nection box can only be changed by removing the actuator and reinstalling it offset by 90deg or 180deg

If more than three valVario controls are installed in line the controls must be supported

The seals in some gas compression fittings are approved for temperatures of up to 70degC (158degF) This temperature limit will not be exceeded if the flow through the pipe is at least 1 msup3h (3531 SCFH) of gas and the maximum ambient temperature is 50degC (122degF)

7 1 1 Installation position

pu ge 80 mbar(80 hPa32 WC)

VAD VAG VAH VRH VAV

In humid environments black solenoid actuator in the vertical upright position only

VAD VAG VAH VRH black solenoid actuator in the vertical upright position or tilted up to the horizontal not upside downVAG VAH horizontal position only if pu ge 80 mbar (32 WC))VAV installation in the vertical position only black solenoid actuator in the vertical upright positionTo ensure that the airgas ratio control VAG the flow rate regulator VAH VRH or the variable airgas ratio control VAV can react quickly when the load is changed the impulse line for the air control pressure psa and for VAV the impulse line for the combustion chamber control pressure psc should be kept as short as possible The tube internal diameter for the impulse line must always be ge 39 mm (015)

VAH VRHIt is not permitted to install a gas solenoid valve VAS down-stream of flow rate regulator VAH VRH and upstream of fine-adjusting valve VMV The VAS would no longer be able to perform its function as a second safety valve if installed in the above-mentioned position

M

VMV

VAH

VASVAS

pd-

psa-psa

VMV

VAH pd-

psa-psa

The measuring orifice in the air line for impulse lines psa and psa- must always be installed downstream of the air control valve

Project planning information gt Installation

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 36

VAVThe impulse line for the combustion chamber control pres-sure psc must be fitted so that no condensation can enter the pressure regulator but rather flows back into the combustion chamber

7 2 Setting the low-fire rate on VAG VAH VRH VAV

-10 +05-05

ndash

+1

-15

mbar

+15

06

1 152

3

N V

+ +ndash

+30 -15+15

ndash

-3

+5

mbar

-5

N

+

VAG VAH VRH VAV

If the burner operates at low-fire rate the gasair mixture can be changed using the parallel shift of the characteristic curve by turning the adjusting screw ldquoNrdquoAdjusting range at low fire VAG VAH VRH -5 to +5 mbar (-195 to +195 WC) VAV -15 to +15 mbar (-06 to +06 WC)

7 3 Setting the high-fire rate on VAVTo set the high-fire rate the transmission ratio is changed us-ing the adjusting screw ldquoVrdquo until the required flue gas values are achievedTransmission ratio V = pdpsa = 061 to 31The settings N and V can influence each other and must be repeated if necessary

+N+V

-V

-N

VAV

psa [mbar]

p d [m

bar]

7 3 1 CalculationWith no connection to the combustion chamber control pres-sure psc pd = V times psa + NWith connection to the combustion chamber control pressure psc (pd - psc) = V times (psa - psc) + N

Project planning information

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 37

pu pd

21579

4836

085310

189

142

8 Accessories8 1 Gas pressure switch DG VC for VAx VRHType Adjusting range [mbar]DG 17VC 2 to 17DG 40VC 5 to 40DG 110VC 30 to 110DG 300VC 100 to 300

Scope of delivery 1 times pressure switch for gas 2 times retaining screws 2 times sealing rings

8 2 Gas pressure switch DG VCT for VAx T VRH TType Adjusting range [WC]DG 17VCT 08 to 68DG 40VCT 2 to 16DG 110VCT 12 to 44DG 300VCT 40 to 120

Scope of delivery 1 times gas pressure switch with AWG 18 connection wires 2 times retaining screws 2 times sealing ringsMonitoring the inlet pressure pu the electrical plug of the pressure switch for gas points towards the inlet flangeMonitoring the outlet pressure pd the electrical plug of the pressure switch for gas points towards the outlet flange

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 38

A BC

D

FE

ACD

F

B

E

8 3 Bypass valvepilot gas valve VAS 18 3 1 VAS 1 attached to VADVAGVAHVAV 1Scope of delivery A 1 times bypasspilot gas valve VAS 1 B 4 times O-rings C 4 times double nuts D 4 times connection parts E 1 times mounting aidBypass valve VAS 1 F 2 times connection pipes if the bypass valve has a blind flange

at the outlet sidePilot gas valve VAS 1 F 1 times connection pipe 1 times sealing plug if the pilot gas valve

has a threaded flange at the outlet side

Accessories

8 3 2 VAS 1 attached to VADVAGVAHVAV 2 VADVAGVAHVAV 3Scope of delivery A 1 times bypasspilot gas valve VAS 1 B 4 times O-rings C 4 times spacer sleeves D 4 times connection parts E 1 times mounting aidBypass valve VAS 1 F 2 times connection pipes if the bypass valve has a blind flange

at the outlet sidePilot gas valve VAS 1 F 1 times connection pipe 1 times sealing plug if the pilot gas valve

has a threaded flange at the outlet side

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 39

2

3

456

810

20

30

405060

80100

∆p [m

bar]

005 01 02 03 05 08 1 2 3 4 51

3

2

Qn [m3h]

1

01

02

03

0405

08

003

002

6 8 10

005 01 02 03 05 08 1 2 3 4 5003 6 8 10

20

005 01 02 03 05 08 1 2 3 4 5003 6 8 10 20

30

∆p [i

nch

WC]

1

2

3

456

810

20

30

40

04

004

006

00801

02

03

0506

08

Qn [SCFH]10 40 60 100 200 3001 500 10002 3 4 5

120 306 8

21 3 4 5 6 7 8 910

8 3 3 Flow rate

The characteristic flow rate curves have been measured for bypass valve VAS 1 with connection pipe diameter 1 to 10 mm (004 to 04) and for the pilot gas valve with 10 mm (04) connection pipe

Bypass valve connection pipe diameter [mm]

Pilo

t gas

val

ve 1

0 m

m (0

4)

conn

ectio

n pi

pe d

iam

eter

Accessories gt Bypass valvepilot gas valve VAS 1

= natural gas (ρ = 080 kgm3) = propane (ρ = 201 kgm3) = air (ρ = 129 kgm3)

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 40

Accessories

8 4 Bypass valvepilot gas valve VBY 8 for VADVAGVAHVAV 1

B

C

AVBY 8

VAx 1

55

(217)40(157)

70 (276)

80(315)

Rp frac14(pilot gas valve)

For mounting on VAD VAG VAH VAV 1 and double solenoid valve VCD VCG VCH VCV 1

8 4 1 Scope of delivery VBY 8I as bypass valveA 1 times bypass valve VBY 8IB 2 times retaining screws with 4 times O-rings both retaining screws

have a bypass orificeC 1 times grease for o-rings

8 4 2 Scope of delivery VBY 8R as pilot gas valveA 1 times pilot gas valve VBY 8RB 2 times retaining screws with 5 x O-rings one retaining screw

has a bypass orifice (2 x O-rings) the other does not (3 x O-rings)

C 1 times grease for O-rings

8 4 3 SelectionType I R W Q K 6L -R -L E B D 05

VBY 8

Order exampleVBY 8RW6L-LED

8 4 4 Type codeCode DescriptionVBY Gas solenoid valve8 Nominal sizeIR

For internal gas pick-up as bypass valveFor external gas pick-up as pilot gas valve

KQW

Mains voltage 24 V DC Mains voltage 120 V AC 5060 HzMains voltage 230 V AC 5060 Hz

6L Electrical connection via plug and socket with LED-R-L

Attachment side of main valve right-hand sideAttachment side of main valve left-hand side

EB

Attached to the VAxEnclosed (separate packing unit)

05D

Nozzle diameter = 05 mm (002)Flow adjustment

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 41

2

01

02

03

05

081

3

456

810

20

30

405060

80100

∆p [m

bar]

1

3

201 02 03 05 1 2 3001 003 4

Qn [m3h]

02 03 05 1 2

01 02 05

002 006

002

002 006 1

0010006 005 01

001

0003

0006 2 3

VBY 8DVBY 805

∆p [i

nch

WC]

1

2

3

456

810

20

30

40

040506

08

1

Qn [SCFH]10 40 60 1005 2081 2 30402

01

02

03

004005006

008

Adjusting range

8 4 5 Flow rateVBY 8 D

+

-

The flow rate can be set by turning the flow rate restrictor (4 mm016 Allen screw) frac14 of a turn Flow rate 10 to 100

VBY 8 05The flow is routed through a 05 mm (002) nozzle and thus has a fixed characteristic flow rate curve Adjustment is not possible

8 4 6 Technical dataInlet pressure pu max 500 mbar (7 psig)Ambient temperature 0 to +60degC (32 to 140degF) no condensation permittedStorage temperature 0 to +40degC (32 to 104degF) no condensation permittedPower consumption 24 V = 8 W 120 V = 8 W 230 V = 95 WEnclosure IP 54

Accessories gt Bypass valvepilot gas valve VBY 8 for VADVAGVAHVAV 1

= natural gas (ρ = 080 kgm3) = propane (ρ = 201 kgm3) = air (ρ = 129 kgm3)

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 42

TC 116VB C

56(22)

49(193)

27(106)

A

A

VCx 1 VCx 2VCx 3

8 5 Tightness control TC 116Vfor VAx 1 ndash 3An adapter plate is required to attach the tightness control to the right- or left-hand side of the pressure regulator with gas solenoid valveScope of delivery A 1 times adapter plate B 2 times O-rings C 2 times retaining screwsFor attachment to left-hand side Order No 74922391 right-hand side Order No 74921995

8 6 Pressure test pointsTest points to check the inlet pressure pu and outlet pressure pdScope of delivery 1 x pressure test points with 1 x profiled sealing rings Order No 74923390

8 7 Cable gland setWhen wiring a double solenoid valve with pressure regula-tor VCx the connection boxes are to be connected using a cable gland setThe cable gland set can only be used if the connection boxes are at the same height and on the same side and if both valves are equipped either with or without a proof of closure switchVA 1 Order No 74921985 VA 2 Order No 74921986 VA 3 Order No 74921987

Accessories

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 43

A B

D

C

Accessories

8 9 Differential pressure orifice

Size PipeDN

Differential pressure orifi cewith outlet dia

1 15 17 mm 0671 20 25 mm 0981 25 30 mm 1182 40 46 mm 1813 50 58 mm 228

If pressure regulator VADVAGVAV 1 is retrofitted upstream of gas solenoid valve VAS 1 a DN 25 differential pressure orifice with outlet opening d = 30 mm (118) must be inserted at the outlet of the pressure regulatorIn the case of pressure regulator VAx 115 or VAx 120 the DN 25 differential pressure orifice must be ordered separately and retrofitted Order No 74922240

8 8 Seal set VA 1 ndash 3VA 1 Order No 74921988 VA 2 Order No 74921989 VA 3 Order No 74921990Scope of deliveryA 1 times double block seal B 2 times O-rings (flange) C 2 times O-rings (pressure switch) for pressure test pointscrew plug D 2 times sealing rings (flat sealing) and 2 times profiled sealing rings

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 44

BA

C

pd-

8 11 Attachment blockFor locked installation of pressure gauge and other acces-soriesScope of delivery A 1 times attachment block B 2 times self-tapping screws for installation C 2 times O-rings

Accessories

8 10 Retaining frameIn the event that a pressure regulator VAx is installed at a later point upstream of a gas solenoid valve VAS a measur-ing orifice VMO or a fine-adjusting valve VMV the retaining frame must be fitted at the inlet of the second device in order to fasten the differential pressure orifice at the regulator outlet Order the retaining frame separatelyRetaining frame for Size 1 Order No 74923029 Size 2 Order No 74923030 Size 3 Order No 74923031

8 12 Gas control lineFine-adjusting valve VMV can be installed on the flow rate regulator VAH for fine adjustment of the gas flow rateThe gas control line for gas outlet pressure pd- is available with 2 18 compression fittingsSize 1 Order No 74924458 Size 2 Order No 74924459

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 45

8 13 Measuring orifice VMOThe measuring orifice VMO is designed to reduce the gas and air flow rates and is installed downstream of the valVario control The measuring orifice is available with Rp internal thread (NPT internal thread) or flange to ISO 7005See wwwdocuthekcom Elster Kromschroumlder Krom-schroumlder LBE Products 03 Valves and butterfly valves valVario accessories Type of document Technical Informa-tion VMO

Accessories

8 14 Filter module VMFUsing the filter module VMF the gas flow upstream of the gas solenoid valve VAS and the airgas ratio control is cleaned The filter module is available with Rp internal thread (NPT internal thread) or flange to ISO 7005 and can also be supplied with fitted pressure switch as an optionSee wwwdocuthekcom Elster Kromschroumlder Krom-schroumlder LBE Products 03 Valves and butterfly valves valVario accessories Type of document Technical Informa-tion VMF

8 15 Fine-adjusting valve VMVThe flow rate is set using the fine-adjusting valve VMV The fine-adjusting valve is available with Rp internal thread (NPT internal thread) or flange to ISO 7005See wwwdocuthekcom Elster Kromschroumlder Krom-schroumlder LBE Products 03 Valves and butterfly valves valVario accessories Type of document Technical Infor-mation VMV

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 46

9 Technical dataGas types natural gas LPG (gaseous) biologically produced methane (max 01 -by-vol H2S) or clean air other gases on request The gas must be clean and dry in all temperature conditions and must not contain condensateCE and FM approved UL listed max inlet pressure pu 10 ndash 500 mbar (4 ndash 200 WC) FM approved (230 V AC 120 V AC 24 V DC) non opera-tional pressure 700 mbar (10 psig)ANSICSA approved (230 V AC 120 V AC 24 V DC) up to 350 mbar (5 psig)Opening time of the solenoid valve quick opening le 05 s Closing time quick closing lt 1 sMedium and ambient temperatures -20 to +60degC (-4 to +140degF) no condensation permittedStorage temperature -20 to +40degC (-4 to +104degF)Enclosure IP 65Valve housing aluminium valve seal NBRConnection flanges with internal thread Rp to ISO 7-1 NPT to ANSIASMESafety valve Class A to EN 161 Factory Mutual Research Class 7400 Process Control Valves (230 V AC 120 V AC 24 V DC) ANSI Z2121 and CSA 65 ANSI Z2118 and CSA 63Control class A to EN 88-1Control range up to 101

Mains voltage 230 V AC +10-15 5060 Hz 200 V AC +10-15 5060 Hz 120 V AC +10-15 5060 Hz 100 V AC +10-15 5060 Hz 24 V DC plusmn20Duty cycle 100Power factor of the solenoid coil cos φ = 09Power consumption

Type Voltage Power

VAx 1

24 V DC 25 W ndash100 V AC 25 W (26 VA)120 V AC 25 W (26 VA)200 V AC 25 W (26 VA)230 V AC 25 W (26 VA)

VAx 2 VAx 3

24 V DC 36 W ndash100 V AC 36 W (40 VA)120 V AC 40 W (44 VA)200 V AC 40 W (44 VA)230 V AC 40 W (44 VA)

VBY24 V DC 8 W ndash

120 V AC 8 W ndash230 V AC 95 W ndash

Cable gland M20 times 15Electrical connection cable with max 25 mm2 (AWG 12) or plug with socket to EN 175301-803

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 47

Position indicator contact rating

Type Voltage Min current(resistive load)

Max current(resistive load)

VAxS VCxS 12 ndash 250 V AC 5060 Hz 100 mA 3 AVAxG VCxG 12 ndash 30 V DC 2 mA 01 A

Position indicator switching frequency max 5 times per minute

Switching current [A]

Switching cyclescos φ = 1 cos φ = 06

01 500000 50000005 300000 250000

1 200000 1000003 100000 ndash

Limited to max 200000 cycles for heating systems

9 1 VADOutlet pressure pd VAD-25 25 ndash 25 mbar (1 ndash 10 WC) VAD-50 20 ndash 50 mbar (8 ndash 20 WC) VAD-100 35 ndash 100 mbar (14 ndash 40 WC)Combustion chamber control pressure psc (connection psa)

-20 to +20 mbar (-78 to +78 WC)

VAD

pu

pd

(psa)

9 2 VAGOutlet pressure pd 05 ndash 100 mbar (02 ndash 40 WC)Air control pressure psa 05 ndash 100 mbar (02 ndash 40 WC)

Adjusting range at low fire plusmn5 mbar (plusmn2 WC)Transmission ratio of gas to air 11The inlet pressure must always be higher than the air control pressure psa + pressure loss ∆p + 5 mbar (2 WC)

VAGpd

pu

psa

psa

VAGK 1 x 18 coupling for plastic hose (internal dia 39 mm (015) external dia 61 mm (024)) or VAGE 1 x 18 compression fitting for 6 times 1 tube or VAGA 1 x NPT 18 adapter or VAGN zero governor with breathing orifice

9 3 VAH VRHAir control pressure psa 06 ndash 100 mbar (024 ndash 40 WC) Differential air pressure ∆psa (psa - psa-) 06 ndash 50 mbar (024 ndash 197 WC) Differential gas pressure ∆pd (pd - pd-) 06 ndash 50 mbar (024 ndash 197 WC)Transmission ratio of gas to air 11The inlet pressure must always be higher than the differen-tial air pressure ∆psa + pressure loss ∆p + max gas pres-sure on burner + 5 mbar (2 WC)Adjusting range at low fire plusmn5 mbar (plusmn2 WC)

Technical data

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 48

VAHVRH

pd-

pu

psa-

psa

Connection of the air control pressure psaVAHE VRHE 3 x 18 compression fitting for 6 times 1 tube or VAHA VRHA 3 x NPT 18 adapter

9 4 VAVOutlet pressure pd 05 ndash 30 mbar (02 ndash 117 WC)Air control pressure psa 04 ndash 30 mbar (015 ndash 117 WC)Combustion chamber control pressure psc

-20 to +20 mbar (-78 to +78 WC)Min control pressure differential psa - psc 04 mbar (015 WC)Min pressure differential pd - psc 05 mbar (02 WC)Adjusting range at low fire plusmn15 mbar (plusmn06 WC)Transmission ratio of gas to air 061 to 31The inlet pressure pu must always be higher than the air control pressure psa times transmission ratio V + pressure loss ∆p + 15 mbar (06 WC)

pu

pd psapsc

VAV

VAVK 2 x plastic hose couplings (internal dia 39 mm (015) external dia 61 mm (024)) or VAVE 2 x 18 compression fitting for 6 times 1 tube or VAVA 2 x NPT 18 adapter

Technical data

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 49

9 5 Safety-specific characteristic values for VAx 1 ndash 3For SILSuitable for Safety Integrity Level SIL 1 2 3

Diagnostic coverage DC 0

Type of subsystem Type A to EN 61508-2 74312

Operating mode High demand mode pursu-ant to EN 61508-4 3512

For PLSuitable for Performance Level PL a b c d e

Category B 1 2 3 4Common cause failure CCF gt 65Application of essential safety requirements Satisfied

Application of tried-and-tested safety requirements Satisfied

For SIL and PL

B10d value

Operating cyclesVAD VAG VAV VAH 1 10094360VAD VAG VAV VAH 2 8229021VAD VAG VAV VAH 3 6363683

Hardware fault tolerance (1 valve) HFT 0

Hardware fault tolerance (2 valves) HFT 1

Safe failure fraction SFF gt 90Fraction of undetected com-mon cause failures β ge 2

Max service life under operating conditions10 years after date of production plus max 12 year in stor-age prior to first use or once the given number of operating cycles has been reached depending on which is achieved firstThe devices are suitable for single-channel systems (HFT = 0) up to SIL 2PL d and up to SIL 3PL e when two re-dundant valves are installed in a double-channel architecture (HFT = 1) provided that the complete system complies with the requirements of EN 61508ISO 13849

For a glossary of terms see page 53 (Glossary)

Technical data

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 50

nop 1hnop 1a

sB10d

T10d aPFHD (1 VAx) 1h

PFHD (2 VAx) 1h

PFDavg (1 VAx)

PFDavg (2 VAx)

Technical data gt Safety-specific characteristic values for VAx 1 ndash 3

9 5 1 Determining the PFHD value the λD value and the MTTFd value

PFHD = λD = x nop= 1MTTFd

01B10d

PFDavg = x λD x 24 x 365 x T10d 12

Type

Cycle time

suitable for

suitable for

PFHD = Probability of dangerous failure (HDM = high de-mand mode) [1hour]PFDavg = Average probability of dangerous failure on de-mand (LDM = low demand mode)λD = Mean dangerous failure rate [1hour]MTTFd = Mean time to dangerous failure [hours]nop = Demand rate (mean number of annual operations) [1hour]

9 5 2 Calculating the PFHD and PFDavg

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 51

VAD VAG VAH VAV

H1

Rp frac14(NPT frac14)

H2

E

LF

F

H4

H3

B

VAxS VAxF

L2G

G

Technical data

9 6 Dimensions

Type

Connec-tion Dimensions

WeightRpNPT DN

L L2 E F G H1 H2 H3 H4 Bmm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch kg lbs

VAx 115 12 15 75 29 ndash ndash 75 29 15 06 ndash ndash 143 56 82 32 161 63 117 46 97 38 18 40VAH 115 12 15 75 29 ndash ndash 75 29 15 06 ndash ndash 143 56 100 39 161 63 135 53 97 38 2 44VAx 120 34 20 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 82 33 161 63 117 46 97 38 19 42VAH 120 34 20 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 100 39 161 63 135 53 97 38 21 46VAx 125 1 25 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 82 33 161 63 117 46 97 38 19 42VAH 125 1 25 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 100 39 161 63 135 53 97 38 21 46VAx 240 112 40 128 50 200 79 85 33 29 11 66 26 170 67 112 44 191 75 162 64 125 49 44 97VAH 240 112 40 128 50 200 79 85 33 29 11 66 26 170 67 132 52 191 75 182 72 125 49 47 104VAx 350 2 50 155 61 230 91 85 33 36 14 74 29 180 70 135 53 201 79 196 77 160 63 61 134VAH 350 2 50 155 61 230 91 85 33 36 14 74 29 180 70 156 61 201 79 217 85 160 63 64 141

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 52

10 Converting unitssee wwwadlatusorg

11 Maintenance cyclesAt least once per annum at least twice per annum for biologi-cally produced methaneIf the flow rate drops clean the strainer

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 53

12 Glossary12 1 Diagnostic coverage DCMeasure of the effectiveness of diagnostics which may be determined as the ratio between the failure rate of detected dangerous failures and the failure rate of total dangerous failuresNOTE Diagnostic coverage can exist for the whole or parts of a safety-related system For example diagnostic cover-age could exist for sensors andor logic system andor final elements Unit see EN ISO 13849-12008

12 2 Mode of operationHigh demand mode or continuous modeOperating mode where the frequency of demands for opera-tion made on a safety-related system is greater than one per year or greater than twice the proof-test frequencysee EN 61508-42008

12 3 CategoryClassification of the safety-related parts of a control system in respect of their resistance to faults and their subsequent behaviour in the fault condition and which is achieved by the structural arrangement of the parts fault detection andor by their reliability see EN ISO 13849-12008

12 4 Common cause failure CCFFailures of different items resulting from a single event where these failures are not consequences of each othersee EN ISO 13849-12008

12 5 Fraction of undetected common cause failures β Fraction of undetected failures of redundant components due to a single event whereby these failures are not based on mutual causesNOTE β is expressed as a fraction in the equations and as a percentage elsewheresee EN 61508-62010

12 6 B10d valueMean number of cycles until 10 of the components fail dan-gerouslysee EN ISO 13849-12008

12 7 T10d valueMean time until 10 of the components fail dangerouslysee EN ISO 13849-12008

12 8 Hardware fault tolerance HFTA hardware fault tolerance of N means that N + 1 is the mini-mum number of faults that could cause a loss of the safety functionsee IEC 61508-22010

12 9 Mean dangerous failure rate λD Mean rate of dangerous failures during operation time (T10d) Unit 1hsee EN ISO 13849-12008

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 54

12 10 Safe failure fraction SFFFraction of safe failures related to all failures which are as-sumed to appearsee EN 13611A22011

12 11 Probability of dangerous failure PFHD Value describing the likelihood of dangerous failure per hour of a component for high demand mode or continuous mode Unit 1hsee EN 13611A22011

12 12 Mean time to dangerous failure MTTFd Expectation of the mean time to dangerous failuresee EN ISO 13849-12008

12 13 Demand rate nop Mean number of annual operationssee EN ISO 13849-12008

12 14 Average probability of dangerous failure on demand PFDavg (LDM = 1 ndash 10 switching cyclesyear)Average probability of a dangerous failure of the safety function on demand (LDM = low demand mode)see EN 61508-6

Glossary

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415

Finally we are offering you the opportunity to assess this ldquoTechnical Information (TI)rdquo and to give us your opinion so that we can improve our documents further and suit them to your needs

ClarityFound information quicklySearched for a long timeDidnrsquot find informationWhat is missing

ComprehensionCoherentToo complicatedNo answer

ScopeToo littleSufficientToo wideNo answer

No answer

NavigationI can find my way aroundI got ldquolostrdquoNo answer

UseTo get to know the productTo choose a productPlanningTo look for information

My scope of functionsTechnical departmentSalesNo answer

Remarks

(Adobe Reader 7 or higher required) wwwadobecom

Elster GmbH Postfach 2809 middot 49018 Osnabruumlck Strotheweg 1 middot 49504 Lotte (Buumlren) GermanyT +49 541 1214-0 F +49 541 1214-370 infokromschroedercomwwwkromschroedercom

The current addresses of our international agents are available on the Internetwwwkromschroederdeindexphpid=718ampL=1

We reserve the right to make technical modifications in the interests of progressCopyright copy 2015 Elster GmbH All rights reserved

Contact

Feedback

0325

0530

  • Pressure regulators with solenoid valve VAD VAG VAV VAH
  • Flow rate regulator VRH
  • Pressure regulators with double solenoid valve VCD VCG VCV VCH
  • Contents
  • 1 Application
    • 11 Examples of application
      • 111 Constant pressure control
      • 112 Constant pressure control with two gas solenoid valves
      • 113 Constant pressure control with max pressure switch
      • 114 Constant pressure control with non-controlled pilot gas outlet
      • 115 Modulating control
      • 116 Modulating control with two gas solenoid valves
      • 117 Modulating control with two gas solenoid valves and inlet pressure switch
      • 118 HighLow control
      • 119 Zero pressure control
      • 1110 Staged flow rate control
      • 1111 Continuous or staged flow rate control
      • 1112 Modulating control with variable airgas ratio control with gas solenoid valve
      • 1113 Modulating control in residential heat generation
          • 2 Certification
          • 3 Function
            • 31 VAD VAG VAH VRH VAV
              • 311 Pressure regulator for gas VAD
              • 312 Airgas ratio control VAG
              • 313 Flow rate regulators VAH VRH
              • 314 Variable airgas ratio control VAV
              • 315 Pressure regulator with gas solenoid valve VAxS position indicator with visual indicator
                • 32 Animation
                • 33 Connection diagram
                  • 331 VAx with M20 cable gland
                  • 332 VAx with plug
                  • 333 VAS with VADVAGVAHVAV with M20 cable gland
                  • 334 VAS with VADVAGVAHVAV with plug
                      • 4 Replacement possibilities for MODULINE pressure regulators with gas solenoid valve
                        • 41 GVS GVI GVIB GVR and GVRH are to be replaced by VAD VAG VAG+VAS VAH and VAV
                          • 5 Flow rate
                            • 51 Selection example for VAD
                              • 511 Calculate VAD
                                • 52 Selection example for VAG VAH VRH VAV
                                  • 521 CalculateVAG VxHVAV
                                    • 53 Selection example for zero governor VAGN
                                      • 531 Calculate VAGN
                                          • 6 Selection
                                            • 61 Selection table for pressure regulator with solenoid valve VAD
                                            • 62 Type code for VAD
                                            • 63 Selection table for airgas ratio control with solenoid valve VAG flow rate regulators VAH VRH
                                            • 64 Type code for VAG VAH VRH
                                            • 65 Selection table for variable airgas ratio control with solenoid valve VAV
                                            • 66 Type code for VAV
                                            • 67 Accessories
                                              • 7 Project planning information
                                                • 71 Installation
                                                  • 711 Installation position
                                                    • 72 Setting the low-fire rate on VAG VAH VRH VAV
                                                    • 73 Setting the high-fire rate on VAV
                                                      • 731 Calculation
                                                          • 8 Accessories
                                                            • 81 Gas pressure switch DGVC for VAx VRH
                                                            • 82 Gas pressure switch DGVCT for VAxT VRHT
                                                            • 83 Bypass valvepilot gas valve VAS 1
                                                              • 831 VAS 1 attached to VADVAGVAHVAV 1
                                                              • 832 VAS 1 attached to VADVAGVAHVAV 2 VADVAGVAHVAV 3
                                                              • 833 Flow rate
                                                                • 84 Bypass valvepilot gas valve VBY 8 for VADVAGVAHVAV 1
                                                                  • 841 Scope of delivery VBY 8I as bypass valve
                                                                  • 842 Scope of delivery VBY 8R as pilot gas valve
                                                                  • 843 Selection
                                                                  • 844 Type code
                                                                  • 845 Flow rate
                                                                  • 846 Technical data
                                                                    • 85 Tightness control TC 116V
                                                                    • 86 Pressure test points
                                                                    • 87 Cable gland set
                                                                    • 88 Seal set VA 1thinspndashthinsp3
                                                                    • 89 Differential pressure orifice
                                                                    • 810 Retaining frame
                                                                    • 811 Attachment block
                                                                    • 812 Gas control line
                                                                    • 813 Measuring orifice VMO
                                                                    • 814 Filter module VMF
                                                                    • 815 Fine-adjusting valve VMV
                                                                      • 9 Technical data
                                                                        • 91 VAD
                                                                        • 92 VAG
                                                                        • 93 VAH VRH
                                                                        • 94 VAV
                                                                        • 95 Safety-specific characteristic values for VAx 1thinspndashthinsp3
                                                                          • 951 Determining the PFHD value the λD value and the MTTFd value
                                                                          • 952 Calculating the PFHD and PFDavg
                                                                            • 96 Dimensions
                                                                              • 10 Converting units
                                                                              • 11 Maintenance cycles
                                                                              • 12 Glossary
                                                                                • 121 Diagnostic coverage DC
                                                                                • 122 Mode of operation
                                                                                • 123 Category
                                                                                • 124 Common cause failure CCF
                                                                                • 125 Fraction of undetected common cause failures β
                                                                                • 126 B10d value
                                                                                • 127 T10d value
                                                                                • 128 Hardware fault tolerance HFT
                                                                                • 129 Mean dangerous failure rate λD
                                                                                • 1210 Safe failure fraction SFF
                                                                                • 1211 Probability of dangerous failure PFHD
                                                                                • 1212 Mean time to dangerous failure MTTFd
                                                                                • 1213 Demand rate nop
                                                                                • 1214 Average probability of dangerous failure on demand PFDavg
                                                                                  • Feedback
                                                                                  • Contact
                                                                                      1. naechste_Seite 24
                                                                                      2. naechste Seite 18
                                                                                      3. naechste Seite 6
                                                                                      4. naechste Seite 16
                                                                                      5. naechste Seite 14
                                                                                      6. naechste Seite 25
                                                                                      7. naechste_Seite 11
                                                                                      8. naechste_Seite 17
                                                                                      9. fbArbeitspunkt_Min Ja
                                                                                      10. fbArbeitspunkt Ja
                                                                                      11. ftProgramm Standard-Programm
                                                                                      12. fz_kv
                                                                                      13. fz_pe 80
                                                                                      14. fz_pG 60
                                                                                      15. fzDelta_p_Soll 20
                                                                                      16. ftEinheit_Druck mbar
                                                                                      17. fatTyp [115]
                                                                                      18. fbArbeitspunkt_Min_2 Ja
                                                                                      19. fbArbeitspunkt_2 Ja
                                                                                      20. ftRegler_Typ VAG
                                                                                      21. ftProgramm_2 Standard-Programm
                                                                                      22. fz_kv_2
                                                                                      23. fatMedium [08]
                                                                                      24. fzDichte 08
                                                                                      25. ftEinheit_Dichte kgm3
                                                                                      26. fzV_Norm 30
                                                                                      27. ftEinheit_Volstrom m3h
                                                                                      28. fz_pe_2 80
                                                                                      29. fz_pG_2 60
                                                                                      30. fzDelta_p_Soll_2 20
                                                                                      31. ftEinheit_Druck2 [mbar]
                                                                                      32. ftEinheit_Geschw [ms]
                                                                                      33. fatTyp_2 [10954451150103322]
                                                                                      34. fbArbeitspunkt_Min_3 Ja
                                                                                      35. fbArbeitspunkt_3 Ja
                                                                                      36. ftProgramm_3 Standard-Programm
                                                                                      37. fz_kv_3
                                                                                      38. fz_pe_3 20
                                                                                      39. fz_pG_3 0
                                                                                      40. fzDelta_p_Soll_3 20
                                                                                      41. fatTyp_3 [123]
                                                                                      42. fatSchaltleistung [6363683]
                                                                                      43. fz_nop_Stunde 1
                                                                                      44. fz_nop_Jahr 8760
                                                                                      45. fzZyklus 3600
                                                                                      46. fzB10d 6363683
                                                                                      47. fzT10d 10
                                                                                      48. fzPFHd_1V 15714170551864384e-8
                                                                                      49. fzPFDavg_1V
                                                                                      50. ftGeeignet_1V PL d SIL 2
                                                                                      51. fzPFHd_2V 33505832253532625e-10
                                                                                      52. fzPFDavg_2V
                                                                                      53. ftGeeignet_2V PL e SIL 3
                                                                                      54. ftUebersicht Off
                                                                                      55. ftVerstaendlichkeit Off
                                                                                      56. ftFehlende_Info
                                                                                      57. ftUmfang Off
                                                                                      58. ftVerwendung_1 Off
                                                                                      59. ftVerwendung_2 Off
                                                                                      60. ftVerwendung_3 Off
                                                                                      61. ftVerwendung_4 Off
                                                                                      62. ftNavigation Off
                                                                                      63. ftTaetigkeitsbereich Off
                                                                                      64. ftBemerkung
                                                                                      65. Michael Rehkamp Elster Kromschroumlder>btnSenden
Page 26: VAD, VAG, VAV, VAH, VRH, VCD, VCG, VCV, VCH · PDF fileVAD, VAG, VAH, VAV, VRH, VCD, VCG, VCV, VCH · Edition 04.15 6 VAD VAD VAS 1 .1 Examples of application 1 .1 .1 Constant pressure

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 26

∆p [i

nch

WC]

Qn [SCFH]100 400 600 4000 60001000 200020 30 40 50 200 3006015 80

1

08

1

2

3

4

56

8

10

20

30

40

5060

80

100

200

∆p [m

bar]

5

8

3

20

10

30

40

80

60

300

400

50

04 06 2 3 4 5 808 10 20 30 402

03 60 100 200

100

200

500

1

3

2

04 06 08 1 2 3 4 5 6 8 10 20 30 40

04 06 08 1 2 3 4 5 6 8 10

200

80 10020 3003

03Qn [m3h]

02

50 60 80 100

40 50 60

VAG

115

N

P1VAG

125

N

VAG

120

N

VAG

240

NP2

VAG

350

N

= natural gas (ρ = 080 kgm3) = propane (ρ = 201 kgm3) = air (ρ = 129 kgm3)

The characteristic flow rate curves have been meas-ured with the specified flanges and a fitted strainer If two or more valves are combined the pressure loss of each additional valve drops by approx 5

5 3 Selection example for zero governor VAG NNatural gas Flow rate Qmax = 30 m3h Inlet pressure pu = 20 mbar Outlet pressure pd = 0 mbar (atmospheric pressure)The desired control ratio from high-fire to low-fire rate is RV = 101High fire ∆p = pu - pd max = 20 mbar Point P1Low fire Point P2 Qmin = 24 m3h at ∆p = 20 mbar RV = Qmax Qmin = 1231Point P1 and point P2 must be within the working range of a unit size We recommend that you select the smallest size to achieve the best control properties

metric imperial

Enter densityFlow rate Qn

Inlet pressure pu

Outlet pressure pd

Product RV

5 3 1 Calculate VAG N

Pressure loss ∆p

∆pmin

Flow rate

v

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 27

6 Selection6 1 Selection table for pressure regulator with solenoid valve VAD

Accessories right Accessories left

Type1) T R N F N K P Q Y W S2) G2) R2) L2) M20

cab

le g

land

Plug

with

soc

ket

Plug

with

out s

ocke

t

-25-50 -100 A B Scre

w p

lug

Pres

sure

test

poi

nt

DG

17V

C 3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

Scre

w p

lug

Pres

sure

test

poi

nt

DG

17V

C 3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

VAD 115

VAD 120

VAD 125

VAD 240

VAD 350

= standard = available1) The following nominal inlet fl ange diameters are also available size 1 with nominal diameter DN 10 size 2 with nominal diameters DN 25 DN 32 and DN 50 size 3 with nominal diameters DN 40 and DN 652) Position indicator and bypasspilot gas valve cannot be fi tted together on the same side3) Specify the test point for inlet pressure pu or outlet pressure pdHelp for selecting the pressure regulator VAD can be found on the ProFi DVD wwwkromschroedercom Products DVD Product fi nder ldquoProFirdquo

Order exampleVAD 240RNW-100A

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 28

Selection

6 2 Type code for VADCode DescriptionVAD Pressure regulator with solenoid valve1 ndash 3 SizeT T-product10 ndash 65 Nominal inlet and outlet diameterRNF

Rp internal threadNPT internal thread

ISO fl angeN Quick opening quick closingKPQYW

Mains voltage 24 V DCMains voltage 100 V AC 5060 HzMains voltage 120 V AC 5060 HzMains voltage 200 V AC 5060 HzMains voltage 230 V AC 5060 Hz

SG

Position indicator with visual indicatorPosition indicator for 24 V with visual indicator

RL

Viewed from the right (in the direction of fl ow)Viewed from the left (in the direction of fl ow)

-25-50-100

Outlet pressure pd 25 ndash 25 mbar20 ndash 50 mbar

35 ndash 100 mbarAB

Standard valve seatReduced valve seat

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 29

Selection

6 3 Selection table for airgas ratio control with solenoid valve VAG flow rate regulators VAH VRH

Type1) T R N F N K P Q Y W S2) G2) R2) L2) M20

cab

le g

land

Plug

with

soc

ket

Plug

with

out s

ocke

t

A B E K A N Scre

w p

lug

Pres

sure

test

poi

ntD

G 1

7VC

3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

Scre

w p

lug

Pres

sure

test

poi

ntD

G 1

7VC

3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

VAG 115 VAG 120 VAG 125 VAG 240 VAG 350

VAH 115 VAH 120 VAH 125 VAH 240 VAH 350

VRH 115 VRH 120 VRH 125 VRH 240 VRH 350

= standard = available1) The following nominal inlet fl ange diameters are also available size 1 with nominal diameter DN 10 size 2 with nominal di-

ameters DN 25 DN 32 and DN 50 size 3 with nominal diameters DN 40 and DN 652) Position indicator and bypasspilot gas valve cannot be fi tted together on the same side3) Specify the test point for inlet pressure pu or outlet pressure pdHelp for selecting the regulators can be found on the ProFi DVD wwwkromschroedercom Products DVD Product fi nder ldquoProFirdquo

Order exampleVAG 240RNWAE

Accessories right Accessories left

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 30

Selection

6 4 Type code for VAG VAH VRHCode DescriptionVAGVAHVRH

Airgas ratio control with solenoid valveFlow rate regulator with solenoid valve

Flow rate regulator1 ndash 3 SizeT T-product15 ndash 50 Nominal inlet and outlet diameterRNF

Rp internal threadNPT internal thread

ISO fl angeN1) Quick opening quick closingK1)

P1)

Q1)

Y1)

W1)

Mains voltage 24 V DCMains voltage 100 V AC 5060 HzMains voltage 120 V AC 5060 HzMains voltage 200 V AC 5060 HzMains voltage 230 V AC 5060 Hz

S1)

G1)Position indicator with visual indicator

Position indicator for 24 V with visual indicatorRL

Viewed from the right (in the direction of fl ow)Viewed from the left (in the direction of fl ow)

AB

Standard valve seatReduced valve seat

EKAN

Connection kit for air control pressure psaVAG VAH VRH compression fi tting

VAG plastic hose couplingVAG VAH VRH NPT 18 adapter

VAG zero governor1) Only available for VAG VAV VAH

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 31

6 5 Selection table for variable airgas ratio control with solenoid valve VAVAccessories right Accessories left

Type1) T R N F N K P Q Y W S2) G2) R2) L2) M20

cab

le g

land

Plug

with

soc

ket

Plug

with

out s

ocke

t

A B E K A Scre

w p

lug

Pres

sure

test

poi

ntD

G 1

7VC

3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

Scre

w p

lug

Pres

sure

test

poi

ntD

G 1

7VC

3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

VAV 115

VAV 120

VAV 125

VAV 240

VAV 350

= standard = available1) The following nominal inlet fl ange diameters are also available size 1 with nominal diameter DN 10 size 2 with nominal diameters DN 25 DN 32 and DN 50 size 3 with nominal diameters DN 40 and DN 652) Position indicator and bypasspilot gas valve cannot be fi tted together on the same side3) Specify the test point for inlet pressure pu or outlet pressure pdHelp for selecting the variable airgas ratio control VAV can be found on the ProFi DVD wwwkromschroedercom

Products DVD Product fi nder ldquoProFirdquo

Order exampleVAV 240RNWAK

Selection

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 32

Selection

6 6 Type code for VAVCode DescriptionVAV Variable airgas ratio control with solenoid valve1 ndash 3 SizeT T-product15 ndash 50 Nominal inlet and outlet diameterRNF

Rp internal threadNPT internal thread

ISO fl angeN Quick opening quick closingKPQYW

Mains voltage 24 V DCMains voltage 100 V AC 5060 HzMains voltage 120 V AC 5060 HzMains voltage 200 V AC 5060 HzMains voltage 230 V AC 5060 Hz

SG

Position indicator with visual indicatorPosition indicator for 24 V with visual indicator

RL

Viewed from the right (in the direction of fl ow)Viewed from the left (in the direction of fl ow)

AB

Standard valve seatReduced valve seat

EKA

Connection kit for air control pressure psa and combus-tion chamber control pressure psc

compression fi ttingplastic hose coupling

NPT 18 adapter

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 33

Selection

6 7 AccessoriesModularly configurable withndash Screw plugsndash Pressure test pointsndash Pressure switch DGVC for inlet

andor outlet pressurendash Tightness control TCndash Bypasspilot gas valve VBY 8 for

size 1ndash Bypasspilot gas valve VAS 1For further information see page 37 (Accessories)

Position indicator

Plug with socket

Plug

Screwplugs

Pressuretest points

Pressure switch DGC Tightness

control TC

Bypasspilot gas valve VBY 8 for size 1

Bypasspilot gas valve VAS 1

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 34

7 Project planning informationDo not store or install the unit in the open airThe inlet pressure pu and the outlet pressure pd can be meas-ured on both sides of the valve body To increase the control accuracy an external impulse line can be connected instead of the pressure test point pd

VAD

pu

pd

(psa)

VAGpd

pu

psa

psa

VAD measurement point for the gas outlet pressure pd on the regulator body A combustion chamber control line (psc) can be connected to connection psa for maintaining a constant burner capacityVAG additional measurement point for the air control pressure psa on the regulator body

VAV

psapsc

pu

pd

VAH VRH

pu

pd-

pdpsa-

psa

VAV measurement point for the outlet pressure pd on the regulator bodyVAH additional measurement points for the outlet pressure pd- and the air control pressure psapsa- on the regulator body

7 1 Installation

GFK

VAGVAH

GFKVAD

Sealing material and thread cuttings must not be allowed to get into the valve housing Install a filter upstream of every system

gt20 mmgt0 79

The unit must not be in contact with masonry Minimum clear-ance 20 mm (079 inches)Ensure that there is sufficient space for installation and ad-justment

le +100 degCle +212 degF

The solenoid body heats up during operation ndash depending on ambient temperature (max 60degC140degF) and intrinsic heating (approx 40degC104degF)

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 35

In the case of double solenoid valves the position of the con-nection box can only be changed by removing the actuator and reinstalling it offset by 90deg or 180deg

If more than three valVario controls are installed in line the controls must be supported

The seals in some gas compression fittings are approved for temperatures of up to 70degC (158degF) This temperature limit will not be exceeded if the flow through the pipe is at least 1 msup3h (3531 SCFH) of gas and the maximum ambient temperature is 50degC (122degF)

7 1 1 Installation position

pu ge 80 mbar(80 hPa32 WC)

VAD VAG VAH VRH VAV

In humid environments black solenoid actuator in the vertical upright position only

VAD VAG VAH VRH black solenoid actuator in the vertical upright position or tilted up to the horizontal not upside downVAG VAH horizontal position only if pu ge 80 mbar (32 WC))VAV installation in the vertical position only black solenoid actuator in the vertical upright positionTo ensure that the airgas ratio control VAG the flow rate regulator VAH VRH or the variable airgas ratio control VAV can react quickly when the load is changed the impulse line for the air control pressure psa and for VAV the impulse line for the combustion chamber control pressure psc should be kept as short as possible The tube internal diameter for the impulse line must always be ge 39 mm (015)

VAH VRHIt is not permitted to install a gas solenoid valve VAS down-stream of flow rate regulator VAH VRH and upstream of fine-adjusting valve VMV The VAS would no longer be able to perform its function as a second safety valve if installed in the above-mentioned position

M

VMV

VAH

VASVAS

pd-

psa-psa

VMV

VAH pd-

psa-psa

The measuring orifice in the air line for impulse lines psa and psa- must always be installed downstream of the air control valve

Project planning information gt Installation

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 36

VAVThe impulse line for the combustion chamber control pres-sure psc must be fitted so that no condensation can enter the pressure regulator but rather flows back into the combustion chamber

7 2 Setting the low-fire rate on VAG VAH VRH VAV

-10 +05-05

ndash

+1

-15

mbar

+15

06

1 152

3

N V

+ +ndash

+30 -15+15

ndash

-3

+5

mbar

-5

N

+

VAG VAH VRH VAV

If the burner operates at low-fire rate the gasair mixture can be changed using the parallel shift of the characteristic curve by turning the adjusting screw ldquoNrdquoAdjusting range at low fire VAG VAH VRH -5 to +5 mbar (-195 to +195 WC) VAV -15 to +15 mbar (-06 to +06 WC)

7 3 Setting the high-fire rate on VAVTo set the high-fire rate the transmission ratio is changed us-ing the adjusting screw ldquoVrdquo until the required flue gas values are achievedTransmission ratio V = pdpsa = 061 to 31The settings N and V can influence each other and must be repeated if necessary

+N+V

-V

-N

VAV

psa [mbar]

p d [m

bar]

7 3 1 CalculationWith no connection to the combustion chamber control pres-sure psc pd = V times psa + NWith connection to the combustion chamber control pressure psc (pd - psc) = V times (psa - psc) + N

Project planning information

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 37

pu pd

21579

4836

085310

189

142

8 Accessories8 1 Gas pressure switch DG VC for VAx VRHType Adjusting range [mbar]DG 17VC 2 to 17DG 40VC 5 to 40DG 110VC 30 to 110DG 300VC 100 to 300

Scope of delivery 1 times pressure switch for gas 2 times retaining screws 2 times sealing rings

8 2 Gas pressure switch DG VCT for VAx T VRH TType Adjusting range [WC]DG 17VCT 08 to 68DG 40VCT 2 to 16DG 110VCT 12 to 44DG 300VCT 40 to 120

Scope of delivery 1 times gas pressure switch with AWG 18 connection wires 2 times retaining screws 2 times sealing ringsMonitoring the inlet pressure pu the electrical plug of the pressure switch for gas points towards the inlet flangeMonitoring the outlet pressure pd the electrical plug of the pressure switch for gas points towards the outlet flange

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 38

A BC

D

FE

ACD

F

B

E

8 3 Bypass valvepilot gas valve VAS 18 3 1 VAS 1 attached to VADVAGVAHVAV 1Scope of delivery A 1 times bypasspilot gas valve VAS 1 B 4 times O-rings C 4 times double nuts D 4 times connection parts E 1 times mounting aidBypass valve VAS 1 F 2 times connection pipes if the bypass valve has a blind flange

at the outlet sidePilot gas valve VAS 1 F 1 times connection pipe 1 times sealing plug if the pilot gas valve

has a threaded flange at the outlet side

Accessories

8 3 2 VAS 1 attached to VADVAGVAHVAV 2 VADVAGVAHVAV 3Scope of delivery A 1 times bypasspilot gas valve VAS 1 B 4 times O-rings C 4 times spacer sleeves D 4 times connection parts E 1 times mounting aidBypass valve VAS 1 F 2 times connection pipes if the bypass valve has a blind flange

at the outlet sidePilot gas valve VAS 1 F 1 times connection pipe 1 times sealing plug if the pilot gas valve

has a threaded flange at the outlet side

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 39

2

3

456

810

20

30

405060

80100

∆p [m

bar]

005 01 02 03 05 08 1 2 3 4 51

3

2

Qn [m3h]

1

01

02

03

0405

08

003

002

6 8 10

005 01 02 03 05 08 1 2 3 4 5003 6 8 10

20

005 01 02 03 05 08 1 2 3 4 5003 6 8 10 20

30

∆p [i

nch

WC]

1

2

3

456

810

20

30

40

04

004

006

00801

02

03

0506

08

Qn [SCFH]10 40 60 100 200 3001 500 10002 3 4 5

120 306 8

21 3 4 5 6 7 8 910

8 3 3 Flow rate

The characteristic flow rate curves have been measured for bypass valve VAS 1 with connection pipe diameter 1 to 10 mm (004 to 04) and for the pilot gas valve with 10 mm (04) connection pipe

Bypass valve connection pipe diameter [mm]

Pilo

t gas

val

ve 1

0 m

m (0

4)

conn

ectio

n pi

pe d

iam

eter

Accessories gt Bypass valvepilot gas valve VAS 1

= natural gas (ρ = 080 kgm3) = propane (ρ = 201 kgm3) = air (ρ = 129 kgm3)

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 40

Accessories

8 4 Bypass valvepilot gas valve VBY 8 for VADVAGVAHVAV 1

B

C

AVBY 8

VAx 1

55

(217)40(157)

70 (276)

80(315)

Rp frac14(pilot gas valve)

For mounting on VAD VAG VAH VAV 1 and double solenoid valve VCD VCG VCH VCV 1

8 4 1 Scope of delivery VBY 8I as bypass valveA 1 times bypass valve VBY 8IB 2 times retaining screws with 4 times O-rings both retaining screws

have a bypass orificeC 1 times grease for o-rings

8 4 2 Scope of delivery VBY 8R as pilot gas valveA 1 times pilot gas valve VBY 8RB 2 times retaining screws with 5 x O-rings one retaining screw

has a bypass orifice (2 x O-rings) the other does not (3 x O-rings)

C 1 times grease for O-rings

8 4 3 SelectionType I R W Q K 6L -R -L E B D 05

VBY 8

Order exampleVBY 8RW6L-LED

8 4 4 Type codeCode DescriptionVBY Gas solenoid valve8 Nominal sizeIR

For internal gas pick-up as bypass valveFor external gas pick-up as pilot gas valve

KQW

Mains voltage 24 V DC Mains voltage 120 V AC 5060 HzMains voltage 230 V AC 5060 Hz

6L Electrical connection via plug and socket with LED-R-L

Attachment side of main valve right-hand sideAttachment side of main valve left-hand side

EB

Attached to the VAxEnclosed (separate packing unit)

05D

Nozzle diameter = 05 mm (002)Flow adjustment

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 41

2

01

02

03

05

081

3

456

810

20

30

405060

80100

∆p [m

bar]

1

3

201 02 03 05 1 2 3001 003 4

Qn [m3h]

02 03 05 1 2

01 02 05

002 006

002

002 006 1

0010006 005 01

001

0003

0006 2 3

VBY 8DVBY 805

∆p [i

nch

WC]

1

2

3

456

810

20

30

40

040506

08

1

Qn [SCFH]10 40 60 1005 2081 2 30402

01

02

03

004005006

008

Adjusting range

8 4 5 Flow rateVBY 8 D

+

-

The flow rate can be set by turning the flow rate restrictor (4 mm016 Allen screw) frac14 of a turn Flow rate 10 to 100

VBY 8 05The flow is routed through a 05 mm (002) nozzle and thus has a fixed characteristic flow rate curve Adjustment is not possible

8 4 6 Technical dataInlet pressure pu max 500 mbar (7 psig)Ambient temperature 0 to +60degC (32 to 140degF) no condensation permittedStorage temperature 0 to +40degC (32 to 104degF) no condensation permittedPower consumption 24 V = 8 W 120 V = 8 W 230 V = 95 WEnclosure IP 54

Accessories gt Bypass valvepilot gas valve VBY 8 for VADVAGVAHVAV 1

= natural gas (ρ = 080 kgm3) = propane (ρ = 201 kgm3) = air (ρ = 129 kgm3)

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 42

TC 116VB C

56(22)

49(193)

27(106)

A

A

VCx 1 VCx 2VCx 3

8 5 Tightness control TC 116Vfor VAx 1 ndash 3An adapter plate is required to attach the tightness control to the right- or left-hand side of the pressure regulator with gas solenoid valveScope of delivery A 1 times adapter plate B 2 times O-rings C 2 times retaining screwsFor attachment to left-hand side Order No 74922391 right-hand side Order No 74921995

8 6 Pressure test pointsTest points to check the inlet pressure pu and outlet pressure pdScope of delivery 1 x pressure test points with 1 x profiled sealing rings Order No 74923390

8 7 Cable gland setWhen wiring a double solenoid valve with pressure regula-tor VCx the connection boxes are to be connected using a cable gland setThe cable gland set can only be used if the connection boxes are at the same height and on the same side and if both valves are equipped either with or without a proof of closure switchVA 1 Order No 74921985 VA 2 Order No 74921986 VA 3 Order No 74921987

Accessories

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 43

A B

D

C

Accessories

8 9 Differential pressure orifice

Size PipeDN

Differential pressure orifi cewith outlet dia

1 15 17 mm 0671 20 25 mm 0981 25 30 mm 1182 40 46 mm 1813 50 58 mm 228

If pressure regulator VADVAGVAV 1 is retrofitted upstream of gas solenoid valve VAS 1 a DN 25 differential pressure orifice with outlet opening d = 30 mm (118) must be inserted at the outlet of the pressure regulatorIn the case of pressure regulator VAx 115 or VAx 120 the DN 25 differential pressure orifice must be ordered separately and retrofitted Order No 74922240

8 8 Seal set VA 1 ndash 3VA 1 Order No 74921988 VA 2 Order No 74921989 VA 3 Order No 74921990Scope of deliveryA 1 times double block seal B 2 times O-rings (flange) C 2 times O-rings (pressure switch) for pressure test pointscrew plug D 2 times sealing rings (flat sealing) and 2 times profiled sealing rings

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 44

BA

C

pd-

8 11 Attachment blockFor locked installation of pressure gauge and other acces-soriesScope of delivery A 1 times attachment block B 2 times self-tapping screws for installation C 2 times O-rings

Accessories

8 10 Retaining frameIn the event that a pressure regulator VAx is installed at a later point upstream of a gas solenoid valve VAS a measur-ing orifice VMO or a fine-adjusting valve VMV the retaining frame must be fitted at the inlet of the second device in order to fasten the differential pressure orifice at the regulator outlet Order the retaining frame separatelyRetaining frame for Size 1 Order No 74923029 Size 2 Order No 74923030 Size 3 Order No 74923031

8 12 Gas control lineFine-adjusting valve VMV can be installed on the flow rate regulator VAH for fine adjustment of the gas flow rateThe gas control line for gas outlet pressure pd- is available with 2 18 compression fittingsSize 1 Order No 74924458 Size 2 Order No 74924459

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 45

8 13 Measuring orifice VMOThe measuring orifice VMO is designed to reduce the gas and air flow rates and is installed downstream of the valVario control The measuring orifice is available with Rp internal thread (NPT internal thread) or flange to ISO 7005See wwwdocuthekcom Elster Kromschroumlder Krom-schroumlder LBE Products 03 Valves and butterfly valves valVario accessories Type of document Technical Informa-tion VMO

Accessories

8 14 Filter module VMFUsing the filter module VMF the gas flow upstream of the gas solenoid valve VAS and the airgas ratio control is cleaned The filter module is available with Rp internal thread (NPT internal thread) or flange to ISO 7005 and can also be supplied with fitted pressure switch as an optionSee wwwdocuthekcom Elster Kromschroumlder Krom-schroumlder LBE Products 03 Valves and butterfly valves valVario accessories Type of document Technical Informa-tion VMF

8 15 Fine-adjusting valve VMVThe flow rate is set using the fine-adjusting valve VMV The fine-adjusting valve is available with Rp internal thread (NPT internal thread) or flange to ISO 7005See wwwdocuthekcom Elster Kromschroumlder Krom-schroumlder LBE Products 03 Valves and butterfly valves valVario accessories Type of document Technical Infor-mation VMV

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 46

9 Technical dataGas types natural gas LPG (gaseous) biologically produced methane (max 01 -by-vol H2S) or clean air other gases on request The gas must be clean and dry in all temperature conditions and must not contain condensateCE and FM approved UL listed max inlet pressure pu 10 ndash 500 mbar (4 ndash 200 WC) FM approved (230 V AC 120 V AC 24 V DC) non opera-tional pressure 700 mbar (10 psig)ANSICSA approved (230 V AC 120 V AC 24 V DC) up to 350 mbar (5 psig)Opening time of the solenoid valve quick opening le 05 s Closing time quick closing lt 1 sMedium and ambient temperatures -20 to +60degC (-4 to +140degF) no condensation permittedStorage temperature -20 to +40degC (-4 to +104degF)Enclosure IP 65Valve housing aluminium valve seal NBRConnection flanges with internal thread Rp to ISO 7-1 NPT to ANSIASMESafety valve Class A to EN 161 Factory Mutual Research Class 7400 Process Control Valves (230 V AC 120 V AC 24 V DC) ANSI Z2121 and CSA 65 ANSI Z2118 and CSA 63Control class A to EN 88-1Control range up to 101

Mains voltage 230 V AC +10-15 5060 Hz 200 V AC +10-15 5060 Hz 120 V AC +10-15 5060 Hz 100 V AC +10-15 5060 Hz 24 V DC plusmn20Duty cycle 100Power factor of the solenoid coil cos φ = 09Power consumption

Type Voltage Power

VAx 1

24 V DC 25 W ndash100 V AC 25 W (26 VA)120 V AC 25 W (26 VA)200 V AC 25 W (26 VA)230 V AC 25 W (26 VA)

VAx 2 VAx 3

24 V DC 36 W ndash100 V AC 36 W (40 VA)120 V AC 40 W (44 VA)200 V AC 40 W (44 VA)230 V AC 40 W (44 VA)

VBY24 V DC 8 W ndash

120 V AC 8 W ndash230 V AC 95 W ndash

Cable gland M20 times 15Electrical connection cable with max 25 mm2 (AWG 12) or plug with socket to EN 175301-803

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 47

Position indicator contact rating

Type Voltage Min current(resistive load)

Max current(resistive load)

VAxS VCxS 12 ndash 250 V AC 5060 Hz 100 mA 3 AVAxG VCxG 12 ndash 30 V DC 2 mA 01 A

Position indicator switching frequency max 5 times per minute

Switching current [A]

Switching cyclescos φ = 1 cos φ = 06

01 500000 50000005 300000 250000

1 200000 1000003 100000 ndash

Limited to max 200000 cycles for heating systems

9 1 VADOutlet pressure pd VAD-25 25 ndash 25 mbar (1 ndash 10 WC) VAD-50 20 ndash 50 mbar (8 ndash 20 WC) VAD-100 35 ndash 100 mbar (14 ndash 40 WC)Combustion chamber control pressure psc (connection psa)

-20 to +20 mbar (-78 to +78 WC)

VAD

pu

pd

(psa)

9 2 VAGOutlet pressure pd 05 ndash 100 mbar (02 ndash 40 WC)Air control pressure psa 05 ndash 100 mbar (02 ndash 40 WC)

Adjusting range at low fire plusmn5 mbar (plusmn2 WC)Transmission ratio of gas to air 11The inlet pressure must always be higher than the air control pressure psa + pressure loss ∆p + 5 mbar (2 WC)

VAGpd

pu

psa

psa

VAGK 1 x 18 coupling for plastic hose (internal dia 39 mm (015) external dia 61 mm (024)) or VAGE 1 x 18 compression fitting for 6 times 1 tube or VAGA 1 x NPT 18 adapter or VAGN zero governor with breathing orifice

9 3 VAH VRHAir control pressure psa 06 ndash 100 mbar (024 ndash 40 WC) Differential air pressure ∆psa (psa - psa-) 06 ndash 50 mbar (024 ndash 197 WC) Differential gas pressure ∆pd (pd - pd-) 06 ndash 50 mbar (024 ndash 197 WC)Transmission ratio of gas to air 11The inlet pressure must always be higher than the differen-tial air pressure ∆psa + pressure loss ∆p + max gas pres-sure on burner + 5 mbar (2 WC)Adjusting range at low fire plusmn5 mbar (plusmn2 WC)

Technical data

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 48

VAHVRH

pd-

pu

psa-

psa

Connection of the air control pressure psaVAHE VRHE 3 x 18 compression fitting for 6 times 1 tube or VAHA VRHA 3 x NPT 18 adapter

9 4 VAVOutlet pressure pd 05 ndash 30 mbar (02 ndash 117 WC)Air control pressure psa 04 ndash 30 mbar (015 ndash 117 WC)Combustion chamber control pressure psc

-20 to +20 mbar (-78 to +78 WC)Min control pressure differential psa - psc 04 mbar (015 WC)Min pressure differential pd - psc 05 mbar (02 WC)Adjusting range at low fire plusmn15 mbar (plusmn06 WC)Transmission ratio of gas to air 061 to 31The inlet pressure pu must always be higher than the air control pressure psa times transmission ratio V + pressure loss ∆p + 15 mbar (06 WC)

pu

pd psapsc

VAV

VAVK 2 x plastic hose couplings (internal dia 39 mm (015) external dia 61 mm (024)) or VAVE 2 x 18 compression fitting for 6 times 1 tube or VAVA 2 x NPT 18 adapter

Technical data

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 49

9 5 Safety-specific characteristic values for VAx 1 ndash 3For SILSuitable for Safety Integrity Level SIL 1 2 3

Diagnostic coverage DC 0

Type of subsystem Type A to EN 61508-2 74312

Operating mode High demand mode pursu-ant to EN 61508-4 3512

For PLSuitable for Performance Level PL a b c d e

Category B 1 2 3 4Common cause failure CCF gt 65Application of essential safety requirements Satisfied

Application of tried-and-tested safety requirements Satisfied

For SIL and PL

B10d value

Operating cyclesVAD VAG VAV VAH 1 10094360VAD VAG VAV VAH 2 8229021VAD VAG VAV VAH 3 6363683

Hardware fault tolerance (1 valve) HFT 0

Hardware fault tolerance (2 valves) HFT 1

Safe failure fraction SFF gt 90Fraction of undetected com-mon cause failures β ge 2

Max service life under operating conditions10 years after date of production plus max 12 year in stor-age prior to first use or once the given number of operating cycles has been reached depending on which is achieved firstThe devices are suitable for single-channel systems (HFT = 0) up to SIL 2PL d and up to SIL 3PL e when two re-dundant valves are installed in a double-channel architecture (HFT = 1) provided that the complete system complies with the requirements of EN 61508ISO 13849

For a glossary of terms see page 53 (Glossary)

Technical data

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 50

nop 1hnop 1a

sB10d

T10d aPFHD (1 VAx) 1h

PFHD (2 VAx) 1h

PFDavg (1 VAx)

PFDavg (2 VAx)

Technical data gt Safety-specific characteristic values for VAx 1 ndash 3

9 5 1 Determining the PFHD value the λD value and the MTTFd value

PFHD = λD = x nop= 1MTTFd

01B10d

PFDavg = x λD x 24 x 365 x T10d 12

Type

Cycle time

suitable for

suitable for

PFHD = Probability of dangerous failure (HDM = high de-mand mode) [1hour]PFDavg = Average probability of dangerous failure on de-mand (LDM = low demand mode)λD = Mean dangerous failure rate [1hour]MTTFd = Mean time to dangerous failure [hours]nop = Demand rate (mean number of annual operations) [1hour]

9 5 2 Calculating the PFHD and PFDavg

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 51

VAD VAG VAH VAV

H1

Rp frac14(NPT frac14)

H2

E

LF

F

H4

H3

B

VAxS VAxF

L2G

G

Technical data

9 6 Dimensions

Type

Connec-tion Dimensions

WeightRpNPT DN

L L2 E F G H1 H2 H3 H4 Bmm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch kg lbs

VAx 115 12 15 75 29 ndash ndash 75 29 15 06 ndash ndash 143 56 82 32 161 63 117 46 97 38 18 40VAH 115 12 15 75 29 ndash ndash 75 29 15 06 ndash ndash 143 56 100 39 161 63 135 53 97 38 2 44VAx 120 34 20 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 82 33 161 63 117 46 97 38 19 42VAH 120 34 20 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 100 39 161 63 135 53 97 38 21 46VAx 125 1 25 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 82 33 161 63 117 46 97 38 19 42VAH 125 1 25 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 100 39 161 63 135 53 97 38 21 46VAx 240 112 40 128 50 200 79 85 33 29 11 66 26 170 67 112 44 191 75 162 64 125 49 44 97VAH 240 112 40 128 50 200 79 85 33 29 11 66 26 170 67 132 52 191 75 182 72 125 49 47 104VAx 350 2 50 155 61 230 91 85 33 36 14 74 29 180 70 135 53 201 79 196 77 160 63 61 134VAH 350 2 50 155 61 230 91 85 33 36 14 74 29 180 70 156 61 201 79 217 85 160 63 64 141

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 52

10 Converting unitssee wwwadlatusorg

11 Maintenance cyclesAt least once per annum at least twice per annum for biologi-cally produced methaneIf the flow rate drops clean the strainer

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 53

12 Glossary12 1 Diagnostic coverage DCMeasure of the effectiveness of diagnostics which may be determined as the ratio between the failure rate of detected dangerous failures and the failure rate of total dangerous failuresNOTE Diagnostic coverage can exist for the whole or parts of a safety-related system For example diagnostic cover-age could exist for sensors andor logic system andor final elements Unit see EN ISO 13849-12008

12 2 Mode of operationHigh demand mode or continuous modeOperating mode where the frequency of demands for opera-tion made on a safety-related system is greater than one per year or greater than twice the proof-test frequencysee EN 61508-42008

12 3 CategoryClassification of the safety-related parts of a control system in respect of their resistance to faults and their subsequent behaviour in the fault condition and which is achieved by the structural arrangement of the parts fault detection andor by their reliability see EN ISO 13849-12008

12 4 Common cause failure CCFFailures of different items resulting from a single event where these failures are not consequences of each othersee EN ISO 13849-12008

12 5 Fraction of undetected common cause failures β Fraction of undetected failures of redundant components due to a single event whereby these failures are not based on mutual causesNOTE β is expressed as a fraction in the equations and as a percentage elsewheresee EN 61508-62010

12 6 B10d valueMean number of cycles until 10 of the components fail dan-gerouslysee EN ISO 13849-12008

12 7 T10d valueMean time until 10 of the components fail dangerouslysee EN ISO 13849-12008

12 8 Hardware fault tolerance HFTA hardware fault tolerance of N means that N + 1 is the mini-mum number of faults that could cause a loss of the safety functionsee IEC 61508-22010

12 9 Mean dangerous failure rate λD Mean rate of dangerous failures during operation time (T10d) Unit 1hsee EN ISO 13849-12008

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 54

12 10 Safe failure fraction SFFFraction of safe failures related to all failures which are as-sumed to appearsee EN 13611A22011

12 11 Probability of dangerous failure PFHD Value describing the likelihood of dangerous failure per hour of a component for high demand mode or continuous mode Unit 1hsee EN 13611A22011

12 12 Mean time to dangerous failure MTTFd Expectation of the mean time to dangerous failuresee EN ISO 13849-12008

12 13 Demand rate nop Mean number of annual operationssee EN ISO 13849-12008

12 14 Average probability of dangerous failure on demand PFDavg (LDM = 1 ndash 10 switching cyclesyear)Average probability of a dangerous failure of the safety function on demand (LDM = low demand mode)see EN 61508-6

Glossary

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415

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Remarks

(Adobe Reader 7 or higher required) wwwadobecom

Elster GmbH Postfach 2809 middot 49018 Osnabruumlck Strotheweg 1 middot 49504 Lotte (Buumlren) GermanyT +49 541 1214-0 F +49 541 1214-370 infokromschroedercomwwwkromschroedercom

The current addresses of our international agents are available on the Internetwwwkromschroederdeindexphpid=718ampL=1

We reserve the right to make technical modifications in the interests of progressCopyright copy 2015 Elster GmbH All rights reserved

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0530

  • Pressure regulators with solenoid valve VAD VAG VAV VAH
  • Flow rate regulator VRH
  • Pressure regulators with double solenoid valve VCD VCG VCV VCH
  • Contents
  • 1 Application
    • 11 Examples of application
      • 111 Constant pressure control
      • 112 Constant pressure control with two gas solenoid valves
      • 113 Constant pressure control with max pressure switch
      • 114 Constant pressure control with non-controlled pilot gas outlet
      • 115 Modulating control
      • 116 Modulating control with two gas solenoid valves
      • 117 Modulating control with two gas solenoid valves and inlet pressure switch
      • 118 HighLow control
      • 119 Zero pressure control
      • 1110 Staged flow rate control
      • 1111 Continuous or staged flow rate control
      • 1112 Modulating control with variable airgas ratio control with gas solenoid valve
      • 1113 Modulating control in residential heat generation
          • 2 Certification
          • 3 Function
            • 31 VAD VAG VAH VRH VAV
              • 311 Pressure regulator for gas VAD
              • 312 Airgas ratio control VAG
              • 313 Flow rate regulators VAH VRH
              • 314 Variable airgas ratio control VAV
              • 315 Pressure regulator with gas solenoid valve VAxS position indicator with visual indicator
                • 32 Animation
                • 33 Connection diagram
                  • 331 VAx with M20 cable gland
                  • 332 VAx with plug
                  • 333 VAS with VADVAGVAHVAV with M20 cable gland
                  • 334 VAS with VADVAGVAHVAV with plug
                      • 4 Replacement possibilities for MODULINE pressure regulators with gas solenoid valve
                        • 41 GVS GVI GVIB GVR and GVRH are to be replaced by VAD VAG VAG+VAS VAH and VAV
                          • 5 Flow rate
                            • 51 Selection example for VAD
                              • 511 Calculate VAD
                                • 52 Selection example for VAG VAH VRH VAV
                                  • 521 CalculateVAG VxHVAV
                                    • 53 Selection example for zero governor VAGN
                                      • 531 Calculate VAGN
                                          • 6 Selection
                                            • 61 Selection table for pressure regulator with solenoid valve VAD
                                            • 62 Type code for VAD
                                            • 63 Selection table for airgas ratio control with solenoid valve VAG flow rate regulators VAH VRH
                                            • 64 Type code for VAG VAH VRH
                                            • 65 Selection table for variable airgas ratio control with solenoid valve VAV
                                            • 66 Type code for VAV
                                            • 67 Accessories
                                              • 7 Project planning information
                                                • 71 Installation
                                                  • 711 Installation position
                                                    • 72 Setting the low-fire rate on VAG VAH VRH VAV
                                                    • 73 Setting the high-fire rate on VAV
                                                      • 731 Calculation
                                                          • 8 Accessories
                                                            • 81 Gas pressure switch DGVC for VAx VRH
                                                            • 82 Gas pressure switch DGVCT for VAxT VRHT
                                                            • 83 Bypass valvepilot gas valve VAS 1
                                                              • 831 VAS 1 attached to VADVAGVAHVAV 1
                                                              • 832 VAS 1 attached to VADVAGVAHVAV 2 VADVAGVAHVAV 3
                                                              • 833 Flow rate
                                                                • 84 Bypass valvepilot gas valve VBY 8 for VADVAGVAHVAV 1
                                                                  • 841 Scope of delivery VBY 8I as bypass valve
                                                                  • 842 Scope of delivery VBY 8R as pilot gas valve
                                                                  • 843 Selection
                                                                  • 844 Type code
                                                                  • 845 Flow rate
                                                                  • 846 Technical data
                                                                    • 85 Tightness control TC 116V
                                                                    • 86 Pressure test points
                                                                    • 87 Cable gland set
                                                                    • 88 Seal set VA 1thinspndashthinsp3
                                                                    • 89 Differential pressure orifice
                                                                    • 810 Retaining frame
                                                                    • 811 Attachment block
                                                                    • 812 Gas control line
                                                                    • 813 Measuring orifice VMO
                                                                    • 814 Filter module VMF
                                                                    • 815 Fine-adjusting valve VMV
                                                                      • 9 Technical data
                                                                        • 91 VAD
                                                                        • 92 VAG
                                                                        • 93 VAH VRH
                                                                        • 94 VAV
                                                                        • 95 Safety-specific characteristic values for VAx 1thinspndashthinsp3
                                                                          • 951 Determining the PFHD value the λD value and the MTTFd value
                                                                          • 952 Calculating the PFHD and PFDavg
                                                                            • 96 Dimensions
                                                                              • 10 Converting units
                                                                              • 11 Maintenance cycles
                                                                              • 12 Glossary
                                                                                • 121 Diagnostic coverage DC
                                                                                • 122 Mode of operation
                                                                                • 123 Category
                                                                                • 124 Common cause failure CCF
                                                                                • 125 Fraction of undetected common cause failures β
                                                                                • 126 B10d value
                                                                                • 127 T10d value
                                                                                • 128 Hardware fault tolerance HFT
                                                                                • 129 Mean dangerous failure rate λD
                                                                                • 1210 Safe failure fraction SFF
                                                                                • 1211 Probability of dangerous failure PFHD
                                                                                • 1212 Mean time to dangerous failure MTTFd
                                                                                • 1213 Demand rate nop
                                                                                • 1214 Average probability of dangerous failure on demand PFDavg
                                                                                  • Feedback
                                                                                  • Contact
                                                                                      1. naechste_Seite 24
                                                                                      2. naechste Seite 18
                                                                                      3. naechste Seite 6
                                                                                      4. naechste Seite 16
                                                                                      5. naechste Seite 14
                                                                                      6. naechste Seite 25
                                                                                      7. naechste_Seite 11
                                                                                      8. naechste_Seite 17
                                                                                      9. fbArbeitspunkt_Min Ja
                                                                                      10. fbArbeitspunkt Ja
                                                                                      11. ftProgramm Standard-Programm
                                                                                      12. fz_kv
                                                                                      13. fz_pe 80
                                                                                      14. fz_pG 60
                                                                                      15. fzDelta_p_Soll 20
                                                                                      16. ftEinheit_Druck mbar
                                                                                      17. fatTyp [115]
                                                                                      18. fbArbeitspunkt_Min_2 Ja
                                                                                      19. fbArbeitspunkt_2 Ja
                                                                                      20. ftRegler_Typ VAG
                                                                                      21. ftProgramm_2 Standard-Programm
                                                                                      22. fz_kv_2
                                                                                      23. fatMedium [08]
                                                                                      24. fzDichte 08
                                                                                      25. ftEinheit_Dichte kgm3
                                                                                      26. fzV_Norm 30
                                                                                      27. ftEinheit_Volstrom m3h
                                                                                      28. fz_pe_2 80
                                                                                      29. fz_pG_2 60
                                                                                      30. fzDelta_p_Soll_2 20
                                                                                      31. ftEinheit_Druck2 [mbar]
                                                                                      32. ftEinheit_Geschw [ms]
                                                                                      33. fatTyp_2 [10954451150103322]
                                                                                      34. fbArbeitspunkt_Min_3 Ja
                                                                                      35. fbArbeitspunkt_3 Ja
                                                                                      36. ftProgramm_3 Standard-Programm
                                                                                      37. fz_kv_3
                                                                                      38. fz_pe_3 20
                                                                                      39. fz_pG_3 0
                                                                                      40. fzDelta_p_Soll_3 20
                                                                                      41. fatTyp_3 [123]
                                                                                      42. fatSchaltleistung [6363683]
                                                                                      43. fz_nop_Stunde 1
                                                                                      44. fz_nop_Jahr 8760
                                                                                      45. fzZyklus 3600
                                                                                      46. fzB10d 6363683
                                                                                      47. fzT10d 10
                                                                                      48. fzPFHd_1V 15714170551864384e-8
                                                                                      49. fzPFDavg_1V
                                                                                      50. ftGeeignet_1V PL d SIL 2
                                                                                      51. fzPFHd_2V 33505832253532625e-10
                                                                                      52. fzPFDavg_2V
                                                                                      53. ftGeeignet_2V PL e SIL 3
                                                                                      54. ftUebersicht Off
                                                                                      55. ftVerstaendlichkeit Off
                                                                                      56. ftFehlende_Info
                                                                                      57. ftUmfang Off
                                                                                      58. ftVerwendung_1 Off
                                                                                      59. ftVerwendung_2 Off
                                                                                      60. ftVerwendung_3 Off
                                                                                      61. ftVerwendung_4 Off
                                                                                      62. ftNavigation Off
                                                                                      63. ftTaetigkeitsbereich Off
                                                                                      64. ftBemerkung
                                                                                      65. Michael Rehkamp Elster Kromschroumlder>btnSenden
Page 27: VAD, VAG, VAV, VAH, VRH, VCD, VCG, VCV, VCH · PDF fileVAD, VAG, VAH, VAV, VRH, VCD, VCG, VCV, VCH · Edition 04.15 6 VAD VAD VAS 1 .1 Examples of application 1 .1 .1 Constant pressure

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 27

6 Selection6 1 Selection table for pressure regulator with solenoid valve VAD

Accessories right Accessories left

Type1) T R N F N K P Q Y W S2) G2) R2) L2) M20

cab

le g

land

Plug

with

soc

ket

Plug

with

out s

ocke

t

-25-50 -100 A B Scre

w p

lug

Pres

sure

test

poi

nt

DG

17V

C 3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

Scre

w p

lug

Pres

sure

test

poi

nt

DG

17V

C 3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

VAD 115

VAD 120

VAD 125

VAD 240

VAD 350

= standard = available1) The following nominal inlet fl ange diameters are also available size 1 with nominal diameter DN 10 size 2 with nominal diameters DN 25 DN 32 and DN 50 size 3 with nominal diameters DN 40 and DN 652) Position indicator and bypasspilot gas valve cannot be fi tted together on the same side3) Specify the test point for inlet pressure pu or outlet pressure pdHelp for selecting the pressure regulator VAD can be found on the ProFi DVD wwwkromschroedercom Products DVD Product fi nder ldquoProFirdquo

Order exampleVAD 240RNW-100A

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 28

Selection

6 2 Type code for VADCode DescriptionVAD Pressure regulator with solenoid valve1 ndash 3 SizeT T-product10 ndash 65 Nominal inlet and outlet diameterRNF

Rp internal threadNPT internal thread

ISO fl angeN Quick opening quick closingKPQYW

Mains voltage 24 V DCMains voltage 100 V AC 5060 HzMains voltage 120 V AC 5060 HzMains voltage 200 V AC 5060 HzMains voltage 230 V AC 5060 Hz

SG

Position indicator with visual indicatorPosition indicator for 24 V with visual indicator

RL

Viewed from the right (in the direction of fl ow)Viewed from the left (in the direction of fl ow)

-25-50-100

Outlet pressure pd 25 ndash 25 mbar20 ndash 50 mbar

35 ndash 100 mbarAB

Standard valve seatReduced valve seat

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 29

Selection

6 3 Selection table for airgas ratio control with solenoid valve VAG flow rate regulators VAH VRH

Type1) T R N F N K P Q Y W S2) G2) R2) L2) M20

cab

le g

land

Plug

with

soc

ket

Plug

with

out s

ocke

t

A B E K A N Scre

w p

lug

Pres

sure

test

poi

ntD

G 1

7VC

3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

Scre

w p

lug

Pres

sure

test

poi

ntD

G 1

7VC

3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

VAG 115 VAG 120 VAG 125 VAG 240 VAG 350

VAH 115 VAH 120 VAH 125 VAH 240 VAH 350

VRH 115 VRH 120 VRH 125 VRH 240 VRH 350

= standard = available1) The following nominal inlet fl ange diameters are also available size 1 with nominal diameter DN 10 size 2 with nominal di-

ameters DN 25 DN 32 and DN 50 size 3 with nominal diameters DN 40 and DN 652) Position indicator and bypasspilot gas valve cannot be fi tted together on the same side3) Specify the test point for inlet pressure pu or outlet pressure pdHelp for selecting the regulators can be found on the ProFi DVD wwwkromschroedercom Products DVD Product fi nder ldquoProFirdquo

Order exampleVAG 240RNWAE

Accessories right Accessories left

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 30

Selection

6 4 Type code for VAG VAH VRHCode DescriptionVAGVAHVRH

Airgas ratio control with solenoid valveFlow rate regulator with solenoid valve

Flow rate regulator1 ndash 3 SizeT T-product15 ndash 50 Nominal inlet and outlet diameterRNF

Rp internal threadNPT internal thread

ISO fl angeN1) Quick opening quick closingK1)

P1)

Q1)

Y1)

W1)

Mains voltage 24 V DCMains voltage 100 V AC 5060 HzMains voltage 120 V AC 5060 HzMains voltage 200 V AC 5060 HzMains voltage 230 V AC 5060 Hz

S1)

G1)Position indicator with visual indicator

Position indicator for 24 V with visual indicatorRL

Viewed from the right (in the direction of fl ow)Viewed from the left (in the direction of fl ow)

AB

Standard valve seatReduced valve seat

EKAN

Connection kit for air control pressure psaVAG VAH VRH compression fi tting

VAG plastic hose couplingVAG VAH VRH NPT 18 adapter

VAG zero governor1) Only available for VAG VAV VAH

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 31

6 5 Selection table for variable airgas ratio control with solenoid valve VAVAccessories right Accessories left

Type1) T R N F N K P Q Y W S2) G2) R2) L2) M20

cab

le g

land

Plug

with

soc

ket

Plug

with

out s

ocke

t

A B E K A Scre

w p

lug

Pres

sure

test

poi

ntD

G 1

7VC

3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

Scre

w p

lug

Pres

sure

test

poi

ntD

G 1

7VC

3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

VAV 115

VAV 120

VAV 125

VAV 240

VAV 350

= standard = available1) The following nominal inlet fl ange diameters are also available size 1 with nominal diameter DN 10 size 2 with nominal diameters DN 25 DN 32 and DN 50 size 3 with nominal diameters DN 40 and DN 652) Position indicator and bypasspilot gas valve cannot be fi tted together on the same side3) Specify the test point for inlet pressure pu or outlet pressure pdHelp for selecting the variable airgas ratio control VAV can be found on the ProFi DVD wwwkromschroedercom

Products DVD Product fi nder ldquoProFirdquo

Order exampleVAV 240RNWAK

Selection

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 32

Selection

6 6 Type code for VAVCode DescriptionVAV Variable airgas ratio control with solenoid valve1 ndash 3 SizeT T-product15 ndash 50 Nominal inlet and outlet diameterRNF

Rp internal threadNPT internal thread

ISO fl angeN Quick opening quick closingKPQYW

Mains voltage 24 V DCMains voltage 100 V AC 5060 HzMains voltage 120 V AC 5060 HzMains voltage 200 V AC 5060 HzMains voltage 230 V AC 5060 Hz

SG

Position indicator with visual indicatorPosition indicator for 24 V with visual indicator

RL

Viewed from the right (in the direction of fl ow)Viewed from the left (in the direction of fl ow)

AB

Standard valve seatReduced valve seat

EKA

Connection kit for air control pressure psa and combus-tion chamber control pressure psc

compression fi ttingplastic hose coupling

NPT 18 adapter

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 33

Selection

6 7 AccessoriesModularly configurable withndash Screw plugsndash Pressure test pointsndash Pressure switch DGVC for inlet

andor outlet pressurendash Tightness control TCndash Bypasspilot gas valve VBY 8 for

size 1ndash Bypasspilot gas valve VAS 1For further information see page 37 (Accessories)

Position indicator

Plug with socket

Plug

Screwplugs

Pressuretest points

Pressure switch DGC Tightness

control TC

Bypasspilot gas valve VBY 8 for size 1

Bypasspilot gas valve VAS 1

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 34

7 Project planning informationDo not store or install the unit in the open airThe inlet pressure pu and the outlet pressure pd can be meas-ured on both sides of the valve body To increase the control accuracy an external impulse line can be connected instead of the pressure test point pd

VAD

pu

pd

(psa)

VAGpd

pu

psa

psa

VAD measurement point for the gas outlet pressure pd on the regulator body A combustion chamber control line (psc) can be connected to connection psa for maintaining a constant burner capacityVAG additional measurement point for the air control pressure psa on the regulator body

VAV

psapsc

pu

pd

VAH VRH

pu

pd-

pdpsa-

psa

VAV measurement point for the outlet pressure pd on the regulator bodyVAH additional measurement points for the outlet pressure pd- and the air control pressure psapsa- on the regulator body

7 1 Installation

GFK

VAGVAH

GFKVAD

Sealing material and thread cuttings must not be allowed to get into the valve housing Install a filter upstream of every system

gt20 mmgt0 79

The unit must not be in contact with masonry Minimum clear-ance 20 mm (079 inches)Ensure that there is sufficient space for installation and ad-justment

le +100 degCle +212 degF

The solenoid body heats up during operation ndash depending on ambient temperature (max 60degC140degF) and intrinsic heating (approx 40degC104degF)

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 35

In the case of double solenoid valves the position of the con-nection box can only be changed by removing the actuator and reinstalling it offset by 90deg or 180deg

If more than three valVario controls are installed in line the controls must be supported

The seals in some gas compression fittings are approved for temperatures of up to 70degC (158degF) This temperature limit will not be exceeded if the flow through the pipe is at least 1 msup3h (3531 SCFH) of gas and the maximum ambient temperature is 50degC (122degF)

7 1 1 Installation position

pu ge 80 mbar(80 hPa32 WC)

VAD VAG VAH VRH VAV

In humid environments black solenoid actuator in the vertical upright position only

VAD VAG VAH VRH black solenoid actuator in the vertical upright position or tilted up to the horizontal not upside downVAG VAH horizontal position only if pu ge 80 mbar (32 WC))VAV installation in the vertical position only black solenoid actuator in the vertical upright positionTo ensure that the airgas ratio control VAG the flow rate regulator VAH VRH or the variable airgas ratio control VAV can react quickly when the load is changed the impulse line for the air control pressure psa and for VAV the impulse line for the combustion chamber control pressure psc should be kept as short as possible The tube internal diameter for the impulse line must always be ge 39 mm (015)

VAH VRHIt is not permitted to install a gas solenoid valve VAS down-stream of flow rate regulator VAH VRH and upstream of fine-adjusting valve VMV The VAS would no longer be able to perform its function as a second safety valve if installed in the above-mentioned position

M

VMV

VAH

VASVAS

pd-

psa-psa

VMV

VAH pd-

psa-psa

The measuring orifice in the air line for impulse lines psa and psa- must always be installed downstream of the air control valve

Project planning information gt Installation

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 36

VAVThe impulse line for the combustion chamber control pres-sure psc must be fitted so that no condensation can enter the pressure regulator but rather flows back into the combustion chamber

7 2 Setting the low-fire rate on VAG VAH VRH VAV

-10 +05-05

ndash

+1

-15

mbar

+15

06

1 152

3

N V

+ +ndash

+30 -15+15

ndash

-3

+5

mbar

-5

N

+

VAG VAH VRH VAV

If the burner operates at low-fire rate the gasair mixture can be changed using the parallel shift of the characteristic curve by turning the adjusting screw ldquoNrdquoAdjusting range at low fire VAG VAH VRH -5 to +5 mbar (-195 to +195 WC) VAV -15 to +15 mbar (-06 to +06 WC)

7 3 Setting the high-fire rate on VAVTo set the high-fire rate the transmission ratio is changed us-ing the adjusting screw ldquoVrdquo until the required flue gas values are achievedTransmission ratio V = pdpsa = 061 to 31The settings N and V can influence each other and must be repeated if necessary

+N+V

-V

-N

VAV

psa [mbar]

p d [m

bar]

7 3 1 CalculationWith no connection to the combustion chamber control pres-sure psc pd = V times psa + NWith connection to the combustion chamber control pressure psc (pd - psc) = V times (psa - psc) + N

Project planning information

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 37

pu pd

21579

4836

085310

189

142

8 Accessories8 1 Gas pressure switch DG VC for VAx VRHType Adjusting range [mbar]DG 17VC 2 to 17DG 40VC 5 to 40DG 110VC 30 to 110DG 300VC 100 to 300

Scope of delivery 1 times pressure switch for gas 2 times retaining screws 2 times sealing rings

8 2 Gas pressure switch DG VCT for VAx T VRH TType Adjusting range [WC]DG 17VCT 08 to 68DG 40VCT 2 to 16DG 110VCT 12 to 44DG 300VCT 40 to 120

Scope of delivery 1 times gas pressure switch with AWG 18 connection wires 2 times retaining screws 2 times sealing ringsMonitoring the inlet pressure pu the electrical plug of the pressure switch for gas points towards the inlet flangeMonitoring the outlet pressure pd the electrical plug of the pressure switch for gas points towards the outlet flange

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 38

A BC

D

FE

ACD

F

B

E

8 3 Bypass valvepilot gas valve VAS 18 3 1 VAS 1 attached to VADVAGVAHVAV 1Scope of delivery A 1 times bypasspilot gas valve VAS 1 B 4 times O-rings C 4 times double nuts D 4 times connection parts E 1 times mounting aidBypass valve VAS 1 F 2 times connection pipes if the bypass valve has a blind flange

at the outlet sidePilot gas valve VAS 1 F 1 times connection pipe 1 times sealing plug if the pilot gas valve

has a threaded flange at the outlet side

Accessories

8 3 2 VAS 1 attached to VADVAGVAHVAV 2 VADVAGVAHVAV 3Scope of delivery A 1 times bypasspilot gas valve VAS 1 B 4 times O-rings C 4 times spacer sleeves D 4 times connection parts E 1 times mounting aidBypass valve VAS 1 F 2 times connection pipes if the bypass valve has a blind flange

at the outlet sidePilot gas valve VAS 1 F 1 times connection pipe 1 times sealing plug if the pilot gas valve

has a threaded flange at the outlet side

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 39

2

3

456

810

20

30

405060

80100

∆p [m

bar]

005 01 02 03 05 08 1 2 3 4 51

3

2

Qn [m3h]

1

01

02

03

0405

08

003

002

6 8 10

005 01 02 03 05 08 1 2 3 4 5003 6 8 10

20

005 01 02 03 05 08 1 2 3 4 5003 6 8 10 20

30

∆p [i

nch

WC]

1

2

3

456

810

20

30

40

04

004

006

00801

02

03

0506

08

Qn [SCFH]10 40 60 100 200 3001 500 10002 3 4 5

120 306 8

21 3 4 5 6 7 8 910

8 3 3 Flow rate

The characteristic flow rate curves have been measured for bypass valve VAS 1 with connection pipe diameter 1 to 10 mm (004 to 04) and for the pilot gas valve with 10 mm (04) connection pipe

Bypass valve connection pipe diameter [mm]

Pilo

t gas

val

ve 1

0 m

m (0

4)

conn

ectio

n pi

pe d

iam

eter

Accessories gt Bypass valvepilot gas valve VAS 1

= natural gas (ρ = 080 kgm3) = propane (ρ = 201 kgm3) = air (ρ = 129 kgm3)

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 40

Accessories

8 4 Bypass valvepilot gas valve VBY 8 for VADVAGVAHVAV 1

B

C

AVBY 8

VAx 1

55

(217)40(157)

70 (276)

80(315)

Rp frac14(pilot gas valve)

For mounting on VAD VAG VAH VAV 1 and double solenoid valve VCD VCG VCH VCV 1

8 4 1 Scope of delivery VBY 8I as bypass valveA 1 times bypass valve VBY 8IB 2 times retaining screws with 4 times O-rings both retaining screws

have a bypass orificeC 1 times grease for o-rings

8 4 2 Scope of delivery VBY 8R as pilot gas valveA 1 times pilot gas valve VBY 8RB 2 times retaining screws with 5 x O-rings one retaining screw

has a bypass orifice (2 x O-rings) the other does not (3 x O-rings)

C 1 times grease for O-rings

8 4 3 SelectionType I R W Q K 6L -R -L E B D 05

VBY 8

Order exampleVBY 8RW6L-LED

8 4 4 Type codeCode DescriptionVBY Gas solenoid valve8 Nominal sizeIR

For internal gas pick-up as bypass valveFor external gas pick-up as pilot gas valve

KQW

Mains voltage 24 V DC Mains voltage 120 V AC 5060 HzMains voltage 230 V AC 5060 Hz

6L Electrical connection via plug and socket with LED-R-L

Attachment side of main valve right-hand sideAttachment side of main valve left-hand side

EB

Attached to the VAxEnclosed (separate packing unit)

05D

Nozzle diameter = 05 mm (002)Flow adjustment

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 41

2

01

02

03

05

081

3

456

810

20

30

405060

80100

∆p [m

bar]

1

3

201 02 03 05 1 2 3001 003 4

Qn [m3h]

02 03 05 1 2

01 02 05

002 006

002

002 006 1

0010006 005 01

001

0003

0006 2 3

VBY 8DVBY 805

∆p [i

nch

WC]

1

2

3

456

810

20

30

40

040506

08

1

Qn [SCFH]10 40 60 1005 2081 2 30402

01

02

03

004005006

008

Adjusting range

8 4 5 Flow rateVBY 8 D

+

-

The flow rate can be set by turning the flow rate restrictor (4 mm016 Allen screw) frac14 of a turn Flow rate 10 to 100

VBY 8 05The flow is routed through a 05 mm (002) nozzle and thus has a fixed characteristic flow rate curve Adjustment is not possible

8 4 6 Technical dataInlet pressure pu max 500 mbar (7 psig)Ambient temperature 0 to +60degC (32 to 140degF) no condensation permittedStorage temperature 0 to +40degC (32 to 104degF) no condensation permittedPower consumption 24 V = 8 W 120 V = 8 W 230 V = 95 WEnclosure IP 54

Accessories gt Bypass valvepilot gas valve VBY 8 for VADVAGVAHVAV 1

= natural gas (ρ = 080 kgm3) = propane (ρ = 201 kgm3) = air (ρ = 129 kgm3)

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 42

TC 116VB C

56(22)

49(193)

27(106)

A

A

VCx 1 VCx 2VCx 3

8 5 Tightness control TC 116Vfor VAx 1 ndash 3An adapter plate is required to attach the tightness control to the right- or left-hand side of the pressure regulator with gas solenoid valveScope of delivery A 1 times adapter plate B 2 times O-rings C 2 times retaining screwsFor attachment to left-hand side Order No 74922391 right-hand side Order No 74921995

8 6 Pressure test pointsTest points to check the inlet pressure pu and outlet pressure pdScope of delivery 1 x pressure test points with 1 x profiled sealing rings Order No 74923390

8 7 Cable gland setWhen wiring a double solenoid valve with pressure regula-tor VCx the connection boxes are to be connected using a cable gland setThe cable gland set can only be used if the connection boxes are at the same height and on the same side and if both valves are equipped either with or without a proof of closure switchVA 1 Order No 74921985 VA 2 Order No 74921986 VA 3 Order No 74921987

Accessories

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 43

A B

D

C

Accessories

8 9 Differential pressure orifice

Size PipeDN

Differential pressure orifi cewith outlet dia

1 15 17 mm 0671 20 25 mm 0981 25 30 mm 1182 40 46 mm 1813 50 58 mm 228

If pressure regulator VADVAGVAV 1 is retrofitted upstream of gas solenoid valve VAS 1 a DN 25 differential pressure orifice with outlet opening d = 30 mm (118) must be inserted at the outlet of the pressure regulatorIn the case of pressure regulator VAx 115 or VAx 120 the DN 25 differential pressure orifice must be ordered separately and retrofitted Order No 74922240

8 8 Seal set VA 1 ndash 3VA 1 Order No 74921988 VA 2 Order No 74921989 VA 3 Order No 74921990Scope of deliveryA 1 times double block seal B 2 times O-rings (flange) C 2 times O-rings (pressure switch) for pressure test pointscrew plug D 2 times sealing rings (flat sealing) and 2 times profiled sealing rings

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 44

BA

C

pd-

8 11 Attachment blockFor locked installation of pressure gauge and other acces-soriesScope of delivery A 1 times attachment block B 2 times self-tapping screws for installation C 2 times O-rings

Accessories

8 10 Retaining frameIn the event that a pressure regulator VAx is installed at a later point upstream of a gas solenoid valve VAS a measur-ing orifice VMO or a fine-adjusting valve VMV the retaining frame must be fitted at the inlet of the second device in order to fasten the differential pressure orifice at the regulator outlet Order the retaining frame separatelyRetaining frame for Size 1 Order No 74923029 Size 2 Order No 74923030 Size 3 Order No 74923031

8 12 Gas control lineFine-adjusting valve VMV can be installed on the flow rate regulator VAH for fine adjustment of the gas flow rateThe gas control line for gas outlet pressure pd- is available with 2 18 compression fittingsSize 1 Order No 74924458 Size 2 Order No 74924459

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 45

8 13 Measuring orifice VMOThe measuring orifice VMO is designed to reduce the gas and air flow rates and is installed downstream of the valVario control The measuring orifice is available with Rp internal thread (NPT internal thread) or flange to ISO 7005See wwwdocuthekcom Elster Kromschroumlder Krom-schroumlder LBE Products 03 Valves and butterfly valves valVario accessories Type of document Technical Informa-tion VMO

Accessories

8 14 Filter module VMFUsing the filter module VMF the gas flow upstream of the gas solenoid valve VAS and the airgas ratio control is cleaned The filter module is available with Rp internal thread (NPT internal thread) or flange to ISO 7005 and can also be supplied with fitted pressure switch as an optionSee wwwdocuthekcom Elster Kromschroumlder Krom-schroumlder LBE Products 03 Valves and butterfly valves valVario accessories Type of document Technical Informa-tion VMF

8 15 Fine-adjusting valve VMVThe flow rate is set using the fine-adjusting valve VMV The fine-adjusting valve is available with Rp internal thread (NPT internal thread) or flange to ISO 7005See wwwdocuthekcom Elster Kromschroumlder Krom-schroumlder LBE Products 03 Valves and butterfly valves valVario accessories Type of document Technical Infor-mation VMV

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 46

9 Technical dataGas types natural gas LPG (gaseous) biologically produced methane (max 01 -by-vol H2S) or clean air other gases on request The gas must be clean and dry in all temperature conditions and must not contain condensateCE and FM approved UL listed max inlet pressure pu 10 ndash 500 mbar (4 ndash 200 WC) FM approved (230 V AC 120 V AC 24 V DC) non opera-tional pressure 700 mbar (10 psig)ANSICSA approved (230 V AC 120 V AC 24 V DC) up to 350 mbar (5 psig)Opening time of the solenoid valve quick opening le 05 s Closing time quick closing lt 1 sMedium and ambient temperatures -20 to +60degC (-4 to +140degF) no condensation permittedStorage temperature -20 to +40degC (-4 to +104degF)Enclosure IP 65Valve housing aluminium valve seal NBRConnection flanges with internal thread Rp to ISO 7-1 NPT to ANSIASMESafety valve Class A to EN 161 Factory Mutual Research Class 7400 Process Control Valves (230 V AC 120 V AC 24 V DC) ANSI Z2121 and CSA 65 ANSI Z2118 and CSA 63Control class A to EN 88-1Control range up to 101

Mains voltage 230 V AC +10-15 5060 Hz 200 V AC +10-15 5060 Hz 120 V AC +10-15 5060 Hz 100 V AC +10-15 5060 Hz 24 V DC plusmn20Duty cycle 100Power factor of the solenoid coil cos φ = 09Power consumption

Type Voltage Power

VAx 1

24 V DC 25 W ndash100 V AC 25 W (26 VA)120 V AC 25 W (26 VA)200 V AC 25 W (26 VA)230 V AC 25 W (26 VA)

VAx 2 VAx 3

24 V DC 36 W ndash100 V AC 36 W (40 VA)120 V AC 40 W (44 VA)200 V AC 40 W (44 VA)230 V AC 40 W (44 VA)

VBY24 V DC 8 W ndash

120 V AC 8 W ndash230 V AC 95 W ndash

Cable gland M20 times 15Electrical connection cable with max 25 mm2 (AWG 12) or plug with socket to EN 175301-803

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 47

Position indicator contact rating

Type Voltage Min current(resistive load)

Max current(resistive load)

VAxS VCxS 12 ndash 250 V AC 5060 Hz 100 mA 3 AVAxG VCxG 12 ndash 30 V DC 2 mA 01 A

Position indicator switching frequency max 5 times per minute

Switching current [A]

Switching cyclescos φ = 1 cos φ = 06

01 500000 50000005 300000 250000

1 200000 1000003 100000 ndash

Limited to max 200000 cycles for heating systems

9 1 VADOutlet pressure pd VAD-25 25 ndash 25 mbar (1 ndash 10 WC) VAD-50 20 ndash 50 mbar (8 ndash 20 WC) VAD-100 35 ndash 100 mbar (14 ndash 40 WC)Combustion chamber control pressure psc (connection psa)

-20 to +20 mbar (-78 to +78 WC)

VAD

pu

pd

(psa)

9 2 VAGOutlet pressure pd 05 ndash 100 mbar (02 ndash 40 WC)Air control pressure psa 05 ndash 100 mbar (02 ndash 40 WC)

Adjusting range at low fire plusmn5 mbar (plusmn2 WC)Transmission ratio of gas to air 11The inlet pressure must always be higher than the air control pressure psa + pressure loss ∆p + 5 mbar (2 WC)

VAGpd

pu

psa

psa

VAGK 1 x 18 coupling for plastic hose (internal dia 39 mm (015) external dia 61 mm (024)) or VAGE 1 x 18 compression fitting for 6 times 1 tube or VAGA 1 x NPT 18 adapter or VAGN zero governor with breathing orifice

9 3 VAH VRHAir control pressure psa 06 ndash 100 mbar (024 ndash 40 WC) Differential air pressure ∆psa (psa - psa-) 06 ndash 50 mbar (024 ndash 197 WC) Differential gas pressure ∆pd (pd - pd-) 06 ndash 50 mbar (024 ndash 197 WC)Transmission ratio of gas to air 11The inlet pressure must always be higher than the differen-tial air pressure ∆psa + pressure loss ∆p + max gas pres-sure on burner + 5 mbar (2 WC)Adjusting range at low fire plusmn5 mbar (plusmn2 WC)

Technical data

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 48

VAHVRH

pd-

pu

psa-

psa

Connection of the air control pressure psaVAHE VRHE 3 x 18 compression fitting for 6 times 1 tube or VAHA VRHA 3 x NPT 18 adapter

9 4 VAVOutlet pressure pd 05 ndash 30 mbar (02 ndash 117 WC)Air control pressure psa 04 ndash 30 mbar (015 ndash 117 WC)Combustion chamber control pressure psc

-20 to +20 mbar (-78 to +78 WC)Min control pressure differential psa - psc 04 mbar (015 WC)Min pressure differential pd - psc 05 mbar (02 WC)Adjusting range at low fire plusmn15 mbar (plusmn06 WC)Transmission ratio of gas to air 061 to 31The inlet pressure pu must always be higher than the air control pressure psa times transmission ratio V + pressure loss ∆p + 15 mbar (06 WC)

pu

pd psapsc

VAV

VAVK 2 x plastic hose couplings (internal dia 39 mm (015) external dia 61 mm (024)) or VAVE 2 x 18 compression fitting for 6 times 1 tube or VAVA 2 x NPT 18 adapter

Technical data

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 49

9 5 Safety-specific characteristic values for VAx 1 ndash 3For SILSuitable for Safety Integrity Level SIL 1 2 3

Diagnostic coverage DC 0

Type of subsystem Type A to EN 61508-2 74312

Operating mode High demand mode pursu-ant to EN 61508-4 3512

For PLSuitable for Performance Level PL a b c d e

Category B 1 2 3 4Common cause failure CCF gt 65Application of essential safety requirements Satisfied

Application of tried-and-tested safety requirements Satisfied

For SIL and PL

B10d value

Operating cyclesVAD VAG VAV VAH 1 10094360VAD VAG VAV VAH 2 8229021VAD VAG VAV VAH 3 6363683

Hardware fault tolerance (1 valve) HFT 0

Hardware fault tolerance (2 valves) HFT 1

Safe failure fraction SFF gt 90Fraction of undetected com-mon cause failures β ge 2

Max service life under operating conditions10 years after date of production plus max 12 year in stor-age prior to first use or once the given number of operating cycles has been reached depending on which is achieved firstThe devices are suitable for single-channel systems (HFT = 0) up to SIL 2PL d and up to SIL 3PL e when two re-dundant valves are installed in a double-channel architecture (HFT = 1) provided that the complete system complies with the requirements of EN 61508ISO 13849

For a glossary of terms see page 53 (Glossary)

Technical data

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 50

nop 1hnop 1a

sB10d

T10d aPFHD (1 VAx) 1h

PFHD (2 VAx) 1h

PFDavg (1 VAx)

PFDavg (2 VAx)

Technical data gt Safety-specific characteristic values for VAx 1 ndash 3

9 5 1 Determining the PFHD value the λD value and the MTTFd value

PFHD = λD = x nop= 1MTTFd

01B10d

PFDavg = x λD x 24 x 365 x T10d 12

Type

Cycle time

suitable for

suitable for

PFHD = Probability of dangerous failure (HDM = high de-mand mode) [1hour]PFDavg = Average probability of dangerous failure on de-mand (LDM = low demand mode)λD = Mean dangerous failure rate [1hour]MTTFd = Mean time to dangerous failure [hours]nop = Demand rate (mean number of annual operations) [1hour]

9 5 2 Calculating the PFHD and PFDavg

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 51

VAD VAG VAH VAV

H1

Rp frac14(NPT frac14)

H2

E

LF

F

H4

H3

B

VAxS VAxF

L2G

G

Technical data

9 6 Dimensions

Type

Connec-tion Dimensions

WeightRpNPT DN

L L2 E F G H1 H2 H3 H4 Bmm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch kg lbs

VAx 115 12 15 75 29 ndash ndash 75 29 15 06 ndash ndash 143 56 82 32 161 63 117 46 97 38 18 40VAH 115 12 15 75 29 ndash ndash 75 29 15 06 ndash ndash 143 56 100 39 161 63 135 53 97 38 2 44VAx 120 34 20 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 82 33 161 63 117 46 97 38 19 42VAH 120 34 20 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 100 39 161 63 135 53 97 38 21 46VAx 125 1 25 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 82 33 161 63 117 46 97 38 19 42VAH 125 1 25 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 100 39 161 63 135 53 97 38 21 46VAx 240 112 40 128 50 200 79 85 33 29 11 66 26 170 67 112 44 191 75 162 64 125 49 44 97VAH 240 112 40 128 50 200 79 85 33 29 11 66 26 170 67 132 52 191 75 182 72 125 49 47 104VAx 350 2 50 155 61 230 91 85 33 36 14 74 29 180 70 135 53 201 79 196 77 160 63 61 134VAH 350 2 50 155 61 230 91 85 33 36 14 74 29 180 70 156 61 201 79 217 85 160 63 64 141

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 52

10 Converting unitssee wwwadlatusorg

11 Maintenance cyclesAt least once per annum at least twice per annum for biologi-cally produced methaneIf the flow rate drops clean the strainer

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 53

12 Glossary12 1 Diagnostic coverage DCMeasure of the effectiveness of diagnostics which may be determined as the ratio between the failure rate of detected dangerous failures and the failure rate of total dangerous failuresNOTE Diagnostic coverage can exist for the whole or parts of a safety-related system For example diagnostic cover-age could exist for sensors andor logic system andor final elements Unit see EN ISO 13849-12008

12 2 Mode of operationHigh demand mode or continuous modeOperating mode where the frequency of demands for opera-tion made on a safety-related system is greater than one per year or greater than twice the proof-test frequencysee EN 61508-42008

12 3 CategoryClassification of the safety-related parts of a control system in respect of their resistance to faults and their subsequent behaviour in the fault condition and which is achieved by the structural arrangement of the parts fault detection andor by their reliability see EN ISO 13849-12008

12 4 Common cause failure CCFFailures of different items resulting from a single event where these failures are not consequences of each othersee EN ISO 13849-12008

12 5 Fraction of undetected common cause failures β Fraction of undetected failures of redundant components due to a single event whereby these failures are not based on mutual causesNOTE β is expressed as a fraction in the equations and as a percentage elsewheresee EN 61508-62010

12 6 B10d valueMean number of cycles until 10 of the components fail dan-gerouslysee EN ISO 13849-12008

12 7 T10d valueMean time until 10 of the components fail dangerouslysee EN ISO 13849-12008

12 8 Hardware fault tolerance HFTA hardware fault tolerance of N means that N + 1 is the mini-mum number of faults that could cause a loss of the safety functionsee IEC 61508-22010

12 9 Mean dangerous failure rate λD Mean rate of dangerous failures during operation time (T10d) Unit 1hsee EN ISO 13849-12008

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 54

12 10 Safe failure fraction SFFFraction of safe failures related to all failures which are as-sumed to appearsee EN 13611A22011

12 11 Probability of dangerous failure PFHD Value describing the likelihood of dangerous failure per hour of a component for high demand mode or continuous mode Unit 1hsee EN 13611A22011

12 12 Mean time to dangerous failure MTTFd Expectation of the mean time to dangerous failuresee EN ISO 13849-12008

12 13 Demand rate nop Mean number of annual operationssee EN ISO 13849-12008

12 14 Average probability of dangerous failure on demand PFDavg (LDM = 1 ndash 10 switching cyclesyear)Average probability of a dangerous failure of the safety function on demand (LDM = low demand mode)see EN 61508-6

Glossary

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415

Finally we are offering you the opportunity to assess this ldquoTechnical Information (TI)rdquo and to give us your opinion so that we can improve our documents further and suit them to your needs

ClarityFound information quicklySearched for a long timeDidnrsquot find informationWhat is missing

ComprehensionCoherentToo complicatedNo answer

ScopeToo littleSufficientToo wideNo answer

No answer

NavigationI can find my way aroundI got ldquolostrdquoNo answer

UseTo get to know the productTo choose a productPlanningTo look for information

My scope of functionsTechnical departmentSalesNo answer

Remarks

(Adobe Reader 7 or higher required) wwwadobecom

Elster GmbH Postfach 2809 middot 49018 Osnabruumlck Strotheweg 1 middot 49504 Lotte (Buumlren) GermanyT +49 541 1214-0 F +49 541 1214-370 infokromschroedercomwwwkromschroedercom

The current addresses of our international agents are available on the Internetwwwkromschroederdeindexphpid=718ampL=1

We reserve the right to make technical modifications in the interests of progressCopyright copy 2015 Elster GmbH All rights reserved

Contact

Feedback

0325

0530

  • Pressure regulators with solenoid valve VAD VAG VAV VAH
  • Flow rate regulator VRH
  • Pressure regulators with double solenoid valve VCD VCG VCV VCH
  • Contents
  • 1 Application
    • 11 Examples of application
      • 111 Constant pressure control
      • 112 Constant pressure control with two gas solenoid valves
      • 113 Constant pressure control with max pressure switch
      • 114 Constant pressure control with non-controlled pilot gas outlet
      • 115 Modulating control
      • 116 Modulating control with two gas solenoid valves
      • 117 Modulating control with two gas solenoid valves and inlet pressure switch
      • 118 HighLow control
      • 119 Zero pressure control
      • 1110 Staged flow rate control
      • 1111 Continuous or staged flow rate control
      • 1112 Modulating control with variable airgas ratio control with gas solenoid valve
      • 1113 Modulating control in residential heat generation
          • 2 Certification
          • 3 Function
            • 31 VAD VAG VAH VRH VAV
              • 311 Pressure regulator for gas VAD
              • 312 Airgas ratio control VAG
              • 313 Flow rate regulators VAH VRH
              • 314 Variable airgas ratio control VAV
              • 315 Pressure regulator with gas solenoid valve VAxS position indicator with visual indicator
                • 32 Animation
                • 33 Connection diagram
                  • 331 VAx with M20 cable gland
                  • 332 VAx with plug
                  • 333 VAS with VADVAGVAHVAV with M20 cable gland
                  • 334 VAS with VADVAGVAHVAV with plug
                      • 4 Replacement possibilities for MODULINE pressure regulators with gas solenoid valve
                        • 41 GVS GVI GVIB GVR and GVRH are to be replaced by VAD VAG VAG+VAS VAH and VAV
                          • 5 Flow rate
                            • 51 Selection example for VAD
                              • 511 Calculate VAD
                                • 52 Selection example for VAG VAH VRH VAV
                                  • 521 CalculateVAG VxHVAV
                                    • 53 Selection example for zero governor VAGN
                                      • 531 Calculate VAGN
                                          • 6 Selection
                                            • 61 Selection table for pressure regulator with solenoid valve VAD
                                            • 62 Type code for VAD
                                            • 63 Selection table for airgas ratio control with solenoid valve VAG flow rate regulators VAH VRH
                                            • 64 Type code for VAG VAH VRH
                                            • 65 Selection table for variable airgas ratio control with solenoid valve VAV
                                            • 66 Type code for VAV
                                            • 67 Accessories
                                              • 7 Project planning information
                                                • 71 Installation
                                                  • 711 Installation position
                                                    • 72 Setting the low-fire rate on VAG VAH VRH VAV
                                                    • 73 Setting the high-fire rate on VAV
                                                      • 731 Calculation
                                                          • 8 Accessories
                                                            • 81 Gas pressure switch DGVC for VAx VRH
                                                            • 82 Gas pressure switch DGVCT for VAxT VRHT
                                                            • 83 Bypass valvepilot gas valve VAS 1
                                                              • 831 VAS 1 attached to VADVAGVAHVAV 1
                                                              • 832 VAS 1 attached to VADVAGVAHVAV 2 VADVAGVAHVAV 3
                                                              • 833 Flow rate
                                                                • 84 Bypass valvepilot gas valve VBY 8 for VADVAGVAHVAV 1
                                                                  • 841 Scope of delivery VBY 8I as bypass valve
                                                                  • 842 Scope of delivery VBY 8R as pilot gas valve
                                                                  • 843 Selection
                                                                  • 844 Type code
                                                                  • 845 Flow rate
                                                                  • 846 Technical data
                                                                    • 85 Tightness control TC 116V
                                                                    • 86 Pressure test points
                                                                    • 87 Cable gland set
                                                                    • 88 Seal set VA 1thinspndashthinsp3
                                                                    • 89 Differential pressure orifice
                                                                    • 810 Retaining frame
                                                                    • 811 Attachment block
                                                                    • 812 Gas control line
                                                                    • 813 Measuring orifice VMO
                                                                    • 814 Filter module VMF
                                                                    • 815 Fine-adjusting valve VMV
                                                                      • 9 Technical data
                                                                        • 91 VAD
                                                                        • 92 VAG
                                                                        • 93 VAH VRH
                                                                        • 94 VAV
                                                                        • 95 Safety-specific characteristic values for VAx 1thinspndashthinsp3
                                                                          • 951 Determining the PFHD value the λD value and the MTTFd value
                                                                          • 952 Calculating the PFHD and PFDavg
                                                                            • 96 Dimensions
                                                                              • 10 Converting units
                                                                              • 11 Maintenance cycles
                                                                              • 12 Glossary
                                                                                • 121 Diagnostic coverage DC
                                                                                • 122 Mode of operation
                                                                                • 123 Category
                                                                                • 124 Common cause failure CCF
                                                                                • 125 Fraction of undetected common cause failures β
                                                                                • 126 B10d value
                                                                                • 127 T10d value
                                                                                • 128 Hardware fault tolerance HFT
                                                                                • 129 Mean dangerous failure rate λD
                                                                                • 1210 Safe failure fraction SFF
                                                                                • 1211 Probability of dangerous failure PFHD
                                                                                • 1212 Mean time to dangerous failure MTTFd
                                                                                • 1213 Demand rate nop
                                                                                • 1214 Average probability of dangerous failure on demand PFDavg
                                                                                  • Feedback
                                                                                  • Contact
                                                                                      1. naechste_Seite 24
                                                                                      2. naechste Seite 18
                                                                                      3. naechste Seite 6
                                                                                      4. naechste Seite 16
                                                                                      5. naechste Seite 14
                                                                                      6. naechste Seite 25
                                                                                      7. naechste_Seite 11
                                                                                      8. naechste_Seite 17
                                                                                      9. fbArbeitspunkt_Min Ja
                                                                                      10. fbArbeitspunkt Ja
                                                                                      11. ftProgramm Standard-Programm
                                                                                      12. fz_kv
                                                                                      13. fz_pe 80
                                                                                      14. fz_pG 60
                                                                                      15. fzDelta_p_Soll 20
                                                                                      16. ftEinheit_Druck mbar
                                                                                      17. fatTyp [115]
                                                                                      18. fbArbeitspunkt_Min_2 Ja
                                                                                      19. fbArbeitspunkt_2 Ja
                                                                                      20. ftRegler_Typ VAG
                                                                                      21. ftProgramm_2 Standard-Programm
                                                                                      22. fz_kv_2
                                                                                      23. fatMedium [08]
                                                                                      24. fzDichte 08
                                                                                      25. ftEinheit_Dichte kgm3
                                                                                      26. fzV_Norm 30
                                                                                      27. ftEinheit_Volstrom m3h
                                                                                      28. fz_pe_2 80
                                                                                      29. fz_pG_2 60
                                                                                      30. fzDelta_p_Soll_2 20
                                                                                      31. ftEinheit_Druck2 [mbar]
                                                                                      32. ftEinheit_Geschw [ms]
                                                                                      33. fatTyp_2 [10954451150103322]
                                                                                      34. fbArbeitspunkt_Min_3 Ja
                                                                                      35. fbArbeitspunkt_3 Ja
                                                                                      36. ftProgramm_3 Standard-Programm
                                                                                      37. fz_kv_3
                                                                                      38. fz_pe_3 20
                                                                                      39. fz_pG_3 0
                                                                                      40. fzDelta_p_Soll_3 20
                                                                                      41. fatTyp_3 [123]
                                                                                      42. fatSchaltleistung [6363683]
                                                                                      43. fz_nop_Stunde 1
                                                                                      44. fz_nop_Jahr 8760
                                                                                      45. fzZyklus 3600
                                                                                      46. fzB10d 6363683
                                                                                      47. fzT10d 10
                                                                                      48. fzPFHd_1V 15714170551864384e-8
                                                                                      49. fzPFDavg_1V
                                                                                      50. ftGeeignet_1V PL d SIL 2
                                                                                      51. fzPFHd_2V 33505832253532625e-10
                                                                                      52. fzPFDavg_2V
                                                                                      53. ftGeeignet_2V PL e SIL 3
                                                                                      54. ftUebersicht Off
                                                                                      55. ftVerstaendlichkeit Off
                                                                                      56. ftFehlende_Info
                                                                                      57. ftUmfang Off
                                                                                      58. ftVerwendung_1 Off
                                                                                      59. ftVerwendung_2 Off
                                                                                      60. ftVerwendung_3 Off
                                                                                      61. ftVerwendung_4 Off
                                                                                      62. ftNavigation Off
                                                                                      63. ftTaetigkeitsbereich Off
                                                                                      64. ftBemerkung
                                                                                      65. Michael Rehkamp Elster Kromschroumlder>btnSenden
Page 28: VAD, VAG, VAV, VAH, VRH, VCD, VCG, VCV, VCH · PDF fileVAD, VAG, VAH, VAV, VRH, VCD, VCG, VCV, VCH · Edition 04.15 6 VAD VAD VAS 1 .1 Examples of application 1 .1 .1 Constant pressure

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 28

Selection

6 2 Type code for VADCode DescriptionVAD Pressure regulator with solenoid valve1 ndash 3 SizeT T-product10 ndash 65 Nominal inlet and outlet diameterRNF

Rp internal threadNPT internal thread

ISO fl angeN Quick opening quick closingKPQYW

Mains voltage 24 V DCMains voltage 100 V AC 5060 HzMains voltage 120 V AC 5060 HzMains voltage 200 V AC 5060 HzMains voltage 230 V AC 5060 Hz

SG

Position indicator with visual indicatorPosition indicator for 24 V with visual indicator

RL

Viewed from the right (in the direction of fl ow)Viewed from the left (in the direction of fl ow)

-25-50-100

Outlet pressure pd 25 ndash 25 mbar20 ndash 50 mbar

35 ndash 100 mbarAB

Standard valve seatReduced valve seat

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 29

Selection

6 3 Selection table for airgas ratio control with solenoid valve VAG flow rate regulators VAH VRH

Type1) T R N F N K P Q Y W S2) G2) R2) L2) M20

cab

le g

land

Plug

with

soc

ket

Plug

with

out s

ocke

t

A B E K A N Scre

w p

lug

Pres

sure

test

poi

ntD

G 1

7VC

3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

Scre

w p

lug

Pres

sure

test

poi

ntD

G 1

7VC

3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

VAG 115 VAG 120 VAG 125 VAG 240 VAG 350

VAH 115 VAH 120 VAH 125 VAH 240 VAH 350

VRH 115 VRH 120 VRH 125 VRH 240 VRH 350

= standard = available1) The following nominal inlet fl ange diameters are also available size 1 with nominal diameter DN 10 size 2 with nominal di-

ameters DN 25 DN 32 and DN 50 size 3 with nominal diameters DN 40 and DN 652) Position indicator and bypasspilot gas valve cannot be fi tted together on the same side3) Specify the test point for inlet pressure pu or outlet pressure pdHelp for selecting the regulators can be found on the ProFi DVD wwwkromschroedercom Products DVD Product fi nder ldquoProFirdquo

Order exampleVAG 240RNWAE

Accessories right Accessories left

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 30

Selection

6 4 Type code for VAG VAH VRHCode DescriptionVAGVAHVRH

Airgas ratio control with solenoid valveFlow rate regulator with solenoid valve

Flow rate regulator1 ndash 3 SizeT T-product15 ndash 50 Nominal inlet and outlet diameterRNF

Rp internal threadNPT internal thread

ISO fl angeN1) Quick opening quick closingK1)

P1)

Q1)

Y1)

W1)

Mains voltage 24 V DCMains voltage 100 V AC 5060 HzMains voltage 120 V AC 5060 HzMains voltage 200 V AC 5060 HzMains voltage 230 V AC 5060 Hz

S1)

G1)Position indicator with visual indicator

Position indicator for 24 V with visual indicatorRL

Viewed from the right (in the direction of fl ow)Viewed from the left (in the direction of fl ow)

AB

Standard valve seatReduced valve seat

EKAN

Connection kit for air control pressure psaVAG VAH VRH compression fi tting

VAG plastic hose couplingVAG VAH VRH NPT 18 adapter

VAG zero governor1) Only available for VAG VAV VAH

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 31

6 5 Selection table for variable airgas ratio control with solenoid valve VAVAccessories right Accessories left

Type1) T R N F N K P Q Y W S2) G2) R2) L2) M20

cab

le g

land

Plug

with

soc

ket

Plug

with

out s

ocke

t

A B E K A Scre

w p

lug

Pres

sure

test

poi

ntD

G 1

7VC

3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

Scre

w p

lug

Pres

sure

test

poi

ntD

G 1

7VC

3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

VAV 115

VAV 120

VAV 125

VAV 240

VAV 350

= standard = available1) The following nominal inlet fl ange diameters are also available size 1 with nominal diameter DN 10 size 2 with nominal diameters DN 25 DN 32 and DN 50 size 3 with nominal diameters DN 40 and DN 652) Position indicator and bypasspilot gas valve cannot be fi tted together on the same side3) Specify the test point for inlet pressure pu or outlet pressure pdHelp for selecting the variable airgas ratio control VAV can be found on the ProFi DVD wwwkromschroedercom

Products DVD Product fi nder ldquoProFirdquo

Order exampleVAV 240RNWAK

Selection

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 32

Selection

6 6 Type code for VAVCode DescriptionVAV Variable airgas ratio control with solenoid valve1 ndash 3 SizeT T-product15 ndash 50 Nominal inlet and outlet diameterRNF

Rp internal threadNPT internal thread

ISO fl angeN Quick opening quick closingKPQYW

Mains voltage 24 V DCMains voltage 100 V AC 5060 HzMains voltage 120 V AC 5060 HzMains voltage 200 V AC 5060 HzMains voltage 230 V AC 5060 Hz

SG

Position indicator with visual indicatorPosition indicator for 24 V with visual indicator

RL

Viewed from the right (in the direction of fl ow)Viewed from the left (in the direction of fl ow)

AB

Standard valve seatReduced valve seat

EKA

Connection kit for air control pressure psa and combus-tion chamber control pressure psc

compression fi ttingplastic hose coupling

NPT 18 adapter

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 33

Selection

6 7 AccessoriesModularly configurable withndash Screw plugsndash Pressure test pointsndash Pressure switch DGVC for inlet

andor outlet pressurendash Tightness control TCndash Bypasspilot gas valve VBY 8 for

size 1ndash Bypasspilot gas valve VAS 1For further information see page 37 (Accessories)

Position indicator

Plug with socket

Plug

Screwplugs

Pressuretest points

Pressure switch DGC Tightness

control TC

Bypasspilot gas valve VBY 8 for size 1

Bypasspilot gas valve VAS 1

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 34

7 Project planning informationDo not store or install the unit in the open airThe inlet pressure pu and the outlet pressure pd can be meas-ured on both sides of the valve body To increase the control accuracy an external impulse line can be connected instead of the pressure test point pd

VAD

pu

pd

(psa)

VAGpd

pu

psa

psa

VAD measurement point for the gas outlet pressure pd on the regulator body A combustion chamber control line (psc) can be connected to connection psa for maintaining a constant burner capacityVAG additional measurement point for the air control pressure psa on the regulator body

VAV

psapsc

pu

pd

VAH VRH

pu

pd-

pdpsa-

psa

VAV measurement point for the outlet pressure pd on the regulator bodyVAH additional measurement points for the outlet pressure pd- and the air control pressure psapsa- on the regulator body

7 1 Installation

GFK

VAGVAH

GFKVAD

Sealing material and thread cuttings must not be allowed to get into the valve housing Install a filter upstream of every system

gt20 mmgt0 79

The unit must not be in contact with masonry Minimum clear-ance 20 mm (079 inches)Ensure that there is sufficient space for installation and ad-justment

le +100 degCle +212 degF

The solenoid body heats up during operation ndash depending on ambient temperature (max 60degC140degF) and intrinsic heating (approx 40degC104degF)

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 35

In the case of double solenoid valves the position of the con-nection box can only be changed by removing the actuator and reinstalling it offset by 90deg or 180deg

If more than three valVario controls are installed in line the controls must be supported

The seals in some gas compression fittings are approved for temperatures of up to 70degC (158degF) This temperature limit will not be exceeded if the flow through the pipe is at least 1 msup3h (3531 SCFH) of gas and the maximum ambient temperature is 50degC (122degF)

7 1 1 Installation position

pu ge 80 mbar(80 hPa32 WC)

VAD VAG VAH VRH VAV

In humid environments black solenoid actuator in the vertical upright position only

VAD VAG VAH VRH black solenoid actuator in the vertical upright position or tilted up to the horizontal not upside downVAG VAH horizontal position only if pu ge 80 mbar (32 WC))VAV installation in the vertical position only black solenoid actuator in the vertical upright positionTo ensure that the airgas ratio control VAG the flow rate regulator VAH VRH or the variable airgas ratio control VAV can react quickly when the load is changed the impulse line for the air control pressure psa and for VAV the impulse line for the combustion chamber control pressure psc should be kept as short as possible The tube internal diameter for the impulse line must always be ge 39 mm (015)

VAH VRHIt is not permitted to install a gas solenoid valve VAS down-stream of flow rate regulator VAH VRH and upstream of fine-adjusting valve VMV The VAS would no longer be able to perform its function as a second safety valve if installed in the above-mentioned position

M

VMV

VAH

VASVAS

pd-

psa-psa

VMV

VAH pd-

psa-psa

The measuring orifice in the air line for impulse lines psa and psa- must always be installed downstream of the air control valve

Project planning information gt Installation

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 36

VAVThe impulse line for the combustion chamber control pres-sure psc must be fitted so that no condensation can enter the pressure regulator but rather flows back into the combustion chamber

7 2 Setting the low-fire rate on VAG VAH VRH VAV

-10 +05-05

ndash

+1

-15

mbar

+15

06

1 152

3

N V

+ +ndash

+30 -15+15

ndash

-3

+5

mbar

-5

N

+

VAG VAH VRH VAV

If the burner operates at low-fire rate the gasair mixture can be changed using the parallel shift of the characteristic curve by turning the adjusting screw ldquoNrdquoAdjusting range at low fire VAG VAH VRH -5 to +5 mbar (-195 to +195 WC) VAV -15 to +15 mbar (-06 to +06 WC)

7 3 Setting the high-fire rate on VAVTo set the high-fire rate the transmission ratio is changed us-ing the adjusting screw ldquoVrdquo until the required flue gas values are achievedTransmission ratio V = pdpsa = 061 to 31The settings N and V can influence each other and must be repeated if necessary

+N+V

-V

-N

VAV

psa [mbar]

p d [m

bar]

7 3 1 CalculationWith no connection to the combustion chamber control pres-sure psc pd = V times psa + NWith connection to the combustion chamber control pressure psc (pd - psc) = V times (psa - psc) + N

Project planning information

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 37

pu pd

21579

4836

085310

189

142

8 Accessories8 1 Gas pressure switch DG VC for VAx VRHType Adjusting range [mbar]DG 17VC 2 to 17DG 40VC 5 to 40DG 110VC 30 to 110DG 300VC 100 to 300

Scope of delivery 1 times pressure switch for gas 2 times retaining screws 2 times sealing rings

8 2 Gas pressure switch DG VCT for VAx T VRH TType Adjusting range [WC]DG 17VCT 08 to 68DG 40VCT 2 to 16DG 110VCT 12 to 44DG 300VCT 40 to 120

Scope of delivery 1 times gas pressure switch with AWG 18 connection wires 2 times retaining screws 2 times sealing ringsMonitoring the inlet pressure pu the electrical plug of the pressure switch for gas points towards the inlet flangeMonitoring the outlet pressure pd the electrical plug of the pressure switch for gas points towards the outlet flange

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 38

A BC

D

FE

ACD

F

B

E

8 3 Bypass valvepilot gas valve VAS 18 3 1 VAS 1 attached to VADVAGVAHVAV 1Scope of delivery A 1 times bypasspilot gas valve VAS 1 B 4 times O-rings C 4 times double nuts D 4 times connection parts E 1 times mounting aidBypass valve VAS 1 F 2 times connection pipes if the bypass valve has a blind flange

at the outlet sidePilot gas valve VAS 1 F 1 times connection pipe 1 times sealing plug if the pilot gas valve

has a threaded flange at the outlet side

Accessories

8 3 2 VAS 1 attached to VADVAGVAHVAV 2 VADVAGVAHVAV 3Scope of delivery A 1 times bypasspilot gas valve VAS 1 B 4 times O-rings C 4 times spacer sleeves D 4 times connection parts E 1 times mounting aidBypass valve VAS 1 F 2 times connection pipes if the bypass valve has a blind flange

at the outlet sidePilot gas valve VAS 1 F 1 times connection pipe 1 times sealing plug if the pilot gas valve

has a threaded flange at the outlet side

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 39

2

3

456

810

20

30

405060

80100

∆p [m

bar]

005 01 02 03 05 08 1 2 3 4 51

3

2

Qn [m3h]

1

01

02

03

0405

08

003

002

6 8 10

005 01 02 03 05 08 1 2 3 4 5003 6 8 10

20

005 01 02 03 05 08 1 2 3 4 5003 6 8 10 20

30

∆p [i

nch

WC]

1

2

3

456

810

20

30

40

04

004

006

00801

02

03

0506

08

Qn [SCFH]10 40 60 100 200 3001 500 10002 3 4 5

120 306 8

21 3 4 5 6 7 8 910

8 3 3 Flow rate

The characteristic flow rate curves have been measured for bypass valve VAS 1 with connection pipe diameter 1 to 10 mm (004 to 04) and for the pilot gas valve with 10 mm (04) connection pipe

Bypass valve connection pipe diameter [mm]

Pilo

t gas

val

ve 1

0 m

m (0

4)

conn

ectio

n pi

pe d

iam

eter

Accessories gt Bypass valvepilot gas valve VAS 1

= natural gas (ρ = 080 kgm3) = propane (ρ = 201 kgm3) = air (ρ = 129 kgm3)

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 40

Accessories

8 4 Bypass valvepilot gas valve VBY 8 for VADVAGVAHVAV 1

B

C

AVBY 8

VAx 1

55

(217)40(157)

70 (276)

80(315)

Rp frac14(pilot gas valve)

For mounting on VAD VAG VAH VAV 1 and double solenoid valve VCD VCG VCH VCV 1

8 4 1 Scope of delivery VBY 8I as bypass valveA 1 times bypass valve VBY 8IB 2 times retaining screws with 4 times O-rings both retaining screws

have a bypass orificeC 1 times grease for o-rings

8 4 2 Scope of delivery VBY 8R as pilot gas valveA 1 times pilot gas valve VBY 8RB 2 times retaining screws with 5 x O-rings one retaining screw

has a bypass orifice (2 x O-rings) the other does not (3 x O-rings)

C 1 times grease for O-rings

8 4 3 SelectionType I R W Q K 6L -R -L E B D 05

VBY 8

Order exampleVBY 8RW6L-LED

8 4 4 Type codeCode DescriptionVBY Gas solenoid valve8 Nominal sizeIR

For internal gas pick-up as bypass valveFor external gas pick-up as pilot gas valve

KQW

Mains voltage 24 V DC Mains voltage 120 V AC 5060 HzMains voltage 230 V AC 5060 Hz

6L Electrical connection via plug and socket with LED-R-L

Attachment side of main valve right-hand sideAttachment side of main valve left-hand side

EB

Attached to the VAxEnclosed (separate packing unit)

05D

Nozzle diameter = 05 mm (002)Flow adjustment

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 41

2

01

02

03

05

081

3

456

810

20

30

405060

80100

∆p [m

bar]

1

3

201 02 03 05 1 2 3001 003 4

Qn [m3h]

02 03 05 1 2

01 02 05

002 006

002

002 006 1

0010006 005 01

001

0003

0006 2 3

VBY 8DVBY 805

∆p [i

nch

WC]

1

2

3

456

810

20

30

40

040506

08

1

Qn [SCFH]10 40 60 1005 2081 2 30402

01

02

03

004005006

008

Adjusting range

8 4 5 Flow rateVBY 8 D

+

-

The flow rate can be set by turning the flow rate restrictor (4 mm016 Allen screw) frac14 of a turn Flow rate 10 to 100

VBY 8 05The flow is routed through a 05 mm (002) nozzle and thus has a fixed characteristic flow rate curve Adjustment is not possible

8 4 6 Technical dataInlet pressure pu max 500 mbar (7 psig)Ambient temperature 0 to +60degC (32 to 140degF) no condensation permittedStorage temperature 0 to +40degC (32 to 104degF) no condensation permittedPower consumption 24 V = 8 W 120 V = 8 W 230 V = 95 WEnclosure IP 54

Accessories gt Bypass valvepilot gas valve VBY 8 for VADVAGVAHVAV 1

= natural gas (ρ = 080 kgm3) = propane (ρ = 201 kgm3) = air (ρ = 129 kgm3)

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 42

TC 116VB C

56(22)

49(193)

27(106)

A

A

VCx 1 VCx 2VCx 3

8 5 Tightness control TC 116Vfor VAx 1 ndash 3An adapter plate is required to attach the tightness control to the right- or left-hand side of the pressure regulator with gas solenoid valveScope of delivery A 1 times adapter plate B 2 times O-rings C 2 times retaining screwsFor attachment to left-hand side Order No 74922391 right-hand side Order No 74921995

8 6 Pressure test pointsTest points to check the inlet pressure pu and outlet pressure pdScope of delivery 1 x pressure test points with 1 x profiled sealing rings Order No 74923390

8 7 Cable gland setWhen wiring a double solenoid valve with pressure regula-tor VCx the connection boxes are to be connected using a cable gland setThe cable gland set can only be used if the connection boxes are at the same height and on the same side and if both valves are equipped either with or without a proof of closure switchVA 1 Order No 74921985 VA 2 Order No 74921986 VA 3 Order No 74921987

Accessories

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 43

A B

D

C

Accessories

8 9 Differential pressure orifice

Size PipeDN

Differential pressure orifi cewith outlet dia

1 15 17 mm 0671 20 25 mm 0981 25 30 mm 1182 40 46 mm 1813 50 58 mm 228

If pressure regulator VADVAGVAV 1 is retrofitted upstream of gas solenoid valve VAS 1 a DN 25 differential pressure orifice with outlet opening d = 30 mm (118) must be inserted at the outlet of the pressure regulatorIn the case of pressure regulator VAx 115 or VAx 120 the DN 25 differential pressure orifice must be ordered separately and retrofitted Order No 74922240

8 8 Seal set VA 1 ndash 3VA 1 Order No 74921988 VA 2 Order No 74921989 VA 3 Order No 74921990Scope of deliveryA 1 times double block seal B 2 times O-rings (flange) C 2 times O-rings (pressure switch) for pressure test pointscrew plug D 2 times sealing rings (flat sealing) and 2 times profiled sealing rings

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 44

BA

C

pd-

8 11 Attachment blockFor locked installation of pressure gauge and other acces-soriesScope of delivery A 1 times attachment block B 2 times self-tapping screws for installation C 2 times O-rings

Accessories

8 10 Retaining frameIn the event that a pressure regulator VAx is installed at a later point upstream of a gas solenoid valve VAS a measur-ing orifice VMO or a fine-adjusting valve VMV the retaining frame must be fitted at the inlet of the second device in order to fasten the differential pressure orifice at the regulator outlet Order the retaining frame separatelyRetaining frame for Size 1 Order No 74923029 Size 2 Order No 74923030 Size 3 Order No 74923031

8 12 Gas control lineFine-adjusting valve VMV can be installed on the flow rate regulator VAH for fine adjustment of the gas flow rateThe gas control line for gas outlet pressure pd- is available with 2 18 compression fittingsSize 1 Order No 74924458 Size 2 Order No 74924459

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 45

8 13 Measuring orifice VMOThe measuring orifice VMO is designed to reduce the gas and air flow rates and is installed downstream of the valVario control The measuring orifice is available with Rp internal thread (NPT internal thread) or flange to ISO 7005See wwwdocuthekcom Elster Kromschroumlder Krom-schroumlder LBE Products 03 Valves and butterfly valves valVario accessories Type of document Technical Informa-tion VMO

Accessories

8 14 Filter module VMFUsing the filter module VMF the gas flow upstream of the gas solenoid valve VAS and the airgas ratio control is cleaned The filter module is available with Rp internal thread (NPT internal thread) or flange to ISO 7005 and can also be supplied with fitted pressure switch as an optionSee wwwdocuthekcom Elster Kromschroumlder Krom-schroumlder LBE Products 03 Valves and butterfly valves valVario accessories Type of document Technical Informa-tion VMF

8 15 Fine-adjusting valve VMVThe flow rate is set using the fine-adjusting valve VMV The fine-adjusting valve is available with Rp internal thread (NPT internal thread) or flange to ISO 7005See wwwdocuthekcom Elster Kromschroumlder Krom-schroumlder LBE Products 03 Valves and butterfly valves valVario accessories Type of document Technical Infor-mation VMV

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 46

9 Technical dataGas types natural gas LPG (gaseous) biologically produced methane (max 01 -by-vol H2S) or clean air other gases on request The gas must be clean and dry in all temperature conditions and must not contain condensateCE and FM approved UL listed max inlet pressure pu 10 ndash 500 mbar (4 ndash 200 WC) FM approved (230 V AC 120 V AC 24 V DC) non opera-tional pressure 700 mbar (10 psig)ANSICSA approved (230 V AC 120 V AC 24 V DC) up to 350 mbar (5 psig)Opening time of the solenoid valve quick opening le 05 s Closing time quick closing lt 1 sMedium and ambient temperatures -20 to +60degC (-4 to +140degF) no condensation permittedStorage temperature -20 to +40degC (-4 to +104degF)Enclosure IP 65Valve housing aluminium valve seal NBRConnection flanges with internal thread Rp to ISO 7-1 NPT to ANSIASMESafety valve Class A to EN 161 Factory Mutual Research Class 7400 Process Control Valves (230 V AC 120 V AC 24 V DC) ANSI Z2121 and CSA 65 ANSI Z2118 and CSA 63Control class A to EN 88-1Control range up to 101

Mains voltage 230 V AC +10-15 5060 Hz 200 V AC +10-15 5060 Hz 120 V AC +10-15 5060 Hz 100 V AC +10-15 5060 Hz 24 V DC plusmn20Duty cycle 100Power factor of the solenoid coil cos φ = 09Power consumption

Type Voltage Power

VAx 1

24 V DC 25 W ndash100 V AC 25 W (26 VA)120 V AC 25 W (26 VA)200 V AC 25 W (26 VA)230 V AC 25 W (26 VA)

VAx 2 VAx 3

24 V DC 36 W ndash100 V AC 36 W (40 VA)120 V AC 40 W (44 VA)200 V AC 40 W (44 VA)230 V AC 40 W (44 VA)

VBY24 V DC 8 W ndash

120 V AC 8 W ndash230 V AC 95 W ndash

Cable gland M20 times 15Electrical connection cable with max 25 mm2 (AWG 12) or plug with socket to EN 175301-803

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 47

Position indicator contact rating

Type Voltage Min current(resistive load)

Max current(resistive load)

VAxS VCxS 12 ndash 250 V AC 5060 Hz 100 mA 3 AVAxG VCxG 12 ndash 30 V DC 2 mA 01 A

Position indicator switching frequency max 5 times per minute

Switching current [A]

Switching cyclescos φ = 1 cos φ = 06

01 500000 50000005 300000 250000

1 200000 1000003 100000 ndash

Limited to max 200000 cycles for heating systems

9 1 VADOutlet pressure pd VAD-25 25 ndash 25 mbar (1 ndash 10 WC) VAD-50 20 ndash 50 mbar (8 ndash 20 WC) VAD-100 35 ndash 100 mbar (14 ndash 40 WC)Combustion chamber control pressure psc (connection psa)

-20 to +20 mbar (-78 to +78 WC)

VAD

pu

pd

(psa)

9 2 VAGOutlet pressure pd 05 ndash 100 mbar (02 ndash 40 WC)Air control pressure psa 05 ndash 100 mbar (02 ndash 40 WC)

Adjusting range at low fire plusmn5 mbar (plusmn2 WC)Transmission ratio of gas to air 11The inlet pressure must always be higher than the air control pressure psa + pressure loss ∆p + 5 mbar (2 WC)

VAGpd

pu

psa

psa

VAGK 1 x 18 coupling for plastic hose (internal dia 39 mm (015) external dia 61 mm (024)) or VAGE 1 x 18 compression fitting for 6 times 1 tube or VAGA 1 x NPT 18 adapter or VAGN zero governor with breathing orifice

9 3 VAH VRHAir control pressure psa 06 ndash 100 mbar (024 ndash 40 WC) Differential air pressure ∆psa (psa - psa-) 06 ndash 50 mbar (024 ndash 197 WC) Differential gas pressure ∆pd (pd - pd-) 06 ndash 50 mbar (024 ndash 197 WC)Transmission ratio of gas to air 11The inlet pressure must always be higher than the differen-tial air pressure ∆psa + pressure loss ∆p + max gas pres-sure on burner + 5 mbar (2 WC)Adjusting range at low fire plusmn5 mbar (plusmn2 WC)

Technical data

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 48

VAHVRH

pd-

pu

psa-

psa

Connection of the air control pressure psaVAHE VRHE 3 x 18 compression fitting for 6 times 1 tube or VAHA VRHA 3 x NPT 18 adapter

9 4 VAVOutlet pressure pd 05 ndash 30 mbar (02 ndash 117 WC)Air control pressure psa 04 ndash 30 mbar (015 ndash 117 WC)Combustion chamber control pressure psc

-20 to +20 mbar (-78 to +78 WC)Min control pressure differential psa - psc 04 mbar (015 WC)Min pressure differential pd - psc 05 mbar (02 WC)Adjusting range at low fire plusmn15 mbar (plusmn06 WC)Transmission ratio of gas to air 061 to 31The inlet pressure pu must always be higher than the air control pressure psa times transmission ratio V + pressure loss ∆p + 15 mbar (06 WC)

pu

pd psapsc

VAV

VAVK 2 x plastic hose couplings (internal dia 39 mm (015) external dia 61 mm (024)) or VAVE 2 x 18 compression fitting for 6 times 1 tube or VAVA 2 x NPT 18 adapter

Technical data

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 49

9 5 Safety-specific characteristic values for VAx 1 ndash 3For SILSuitable for Safety Integrity Level SIL 1 2 3

Diagnostic coverage DC 0

Type of subsystem Type A to EN 61508-2 74312

Operating mode High demand mode pursu-ant to EN 61508-4 3512

For PLSuitable for Performance Level PL a b c d e

Category B 1 2 3 4Common cause failure CCF gt 65Application of essential safety requirements Satisfied

Application of tried-and-tested safety requirements Satisfied

For SIL and PL

B10d value

Operating cyclesVAD VAG VAV VAH 1 10094360VAD VAG VAV VAH 2 8229021VAD VAG VAV VAH 3 6363683

Hardware fault tolerance (1 valve) HFT 0

Hardware fault tolerance (2 valves) HFT 1

Safe failure fraction SFF gt 90Fraction of undetected com-mon cause failures β ge 2

Max service life under operating conditions10 years after date of production plus max 12 year in stor-age prior to first use or once the given number of operating cycles has been reached depending on which is achieved firstThe devices are suitable for single-channel systems (HFT = 0) up to SIL 2PL d and up to SIL 3PL e when two re-dundant valves are installed in a double-channel architecture (HFT = 1) provided that the complete system complies with the requirements of EN 61508ISO 13849

For a glossary of terms see page 53 (Glossary)

Technical data

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 50

nop 1hnop 1a

sB10d

T10d aPFHD (1 VAx) 1h

PFHD (2 VAx) 1h

PFDavg (1 VAx)

PFDavg (2 VAx)

Technical data gt Safety-specific characteristic values for VAx 1 ndash 3

9 5 1 Determining the PFHD value the λD value and the MTTFd value

PFHD = λD = x nop= 1MTTFd

01B10d

PFDavg = x λD x 24 x 365 x T10d 12

Type

Cycle time

suitable for

suitable for

PFHD = Probability of dangerous failure (HDM = high de-mand mode) [1hour]PFDavg = Average probability of dangerous failure on de-mand (LDM = low demand mode)λD = Mean dangerous failure rate [1hour]MTTFd = Mean time to dangerous failure [hours]nop = Demand rate (mean number of annual operations) [1hour]

9 5 2 Calculating the PFHD and PFDavg

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 51

VAD VAG VAH VAV

H1

Rp frac14(NPT frac14)

H2

E

LF

F

H4

H3

B

VAxS VAxF

L2G

G

Technical data

9 6 Dimensions

Type

Connec-tion Dimensions

WeightRpNPT DN

L L2 E F G H1 H2 H3 H4 Bmm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch kg lbs

VAx 115 12 15 75 29 ndash ndash 75 29 15 06 ndash ndash 143 56 82 32 161 63 117 46 97 38 18 40VAH 115 12 15 75 29 ndash ndash 75 29 15 06 ndash ndash 143 56 100 39 161 63 135 53 97 38 2 44VAx 120 34 20 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 82 33 161 63 117 46 97 38 19 42VAH 120 34 20 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 100 39 161 63 135 53 97 38 21 46VAx 125 1 25 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 82 33 161 63 117 46 97 38 19 42VAH 125 1 25 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 100 39 161 63 135 53 97 38 21 46VAx 240 112 40 128 50 200 79 85 33 29 11 66 26 170 67 112 44 191 75 162 64 125 49 44 97VAH 240 112 40 128 50 200 79 85 33 29 11 66 26 170 67 132 52 191 75 182 72 125 49 47 104VAx 350 2 50 155 61 230 91 85 33 36 14 74 29 180 70 135 53 201 79 196 77 160 63 61 134VAH 350 2 50 155 61 230 91 85 33 36 14 74 29 180 70 156 61 201 79 217 85 160 63 64 141

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 52

10 Converting unitssee wwwadlatusorg

11 Maintenance cyclesAt least once per annum at least twice per annum for biologi-cally produced methaneIf the flow rate drops clean the strainer

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 53

12 Glossary12 1 Diagnostic coverage DCMeasure of the effectiveness of diagnostics which may be determined as the ratio between the failure rate of detected dangerous failures and the failure rate of total dangerous failuresNOTE Diagnostic coverage can exist for the whole or parts of a safety-related system For example diagnostic cover-age could exist for sensors andor logic system andor final elements Unit see EN ISO 13849-12008

12 2 Mode of operationHigh demand mode or continuous modeOperating mode where the frequency of demands for opera-tion made on a safety-related system is greater than one per year or greater than twice the proof-test frequencysee EN 61508-42008

12 3 CategoryClassification of the safety-related parts of a control system in respect of their resistance to faults and their subsequent behaviour in the fault condition and which is achieved by the structural arrangement of the parts fault detection andor by their reliability see EN ISO 13849-12008

12 4 Common cause failure CCFFailures of different items resulting from a single event where these failures are not consequences of each othersee EN ISO 13849-12008

12 5 Fraction of undetected common cause failures β Fraction of undetected failures of redundant components due to a single event whereby these failures are not based on mutual causesNOTE β is expressed as a fraction in the equations and as a percentage elsewheresee EN 61508-62010

12 6 B10d valueMean number of cycles until 10 of the components fail dan-gerouslysee EN ISO 13849-12008

12 7 T10d valueMean time until 10 of the components fail dangerouslysee EN ISO 13849-12008

12 8 Hardware fault tolerance HFTA hardware fault tolerance of N means that N + 1 is the mini-mum number of faults that could cause a loss of the safety functionsee IEC 61508-22010

12 9 Mean dangerous failure rate λD Mean rate of dangerous failures during operation time (T10d) Unit 1hsee EN ISO 13849-12008

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 54

12 10 Safe failure fraction SFFFraction of safe failures related to all failures which are as-sumed to appearsee EN 13611A22011

12 11 Probability of dangerous failure PFHD Value describing the likelihood of dangerous failure per hour of a component for high demand mode or continuous mode Unit 1hsee EN 13611A22011

12 12 Mean time to dangerous failure MTTFd Expectation of the mean time to dangerous failuresee EN ISO 13849-12008

12 13 Demand rate nop Mean number of annual operationssee EN ISO 13849-12008

12 14 Average probability of dangerous failure on demand PFDavg (LDM = 1 ndash 10 switching cyclesyear)Average probability of a dangerous failure of the safety function on demand (LDM = low demand mode)see EN 61508-6

Glossary

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415

Finally we are offering you the opportunity to assess this ldquoTechnical Information (TI)rdquo and to give us your opinion so that we can improve our documents further and suit them to your needs

ClarityFound information quicklySearched for a long timeDidnrsquot find informationWhat is missing

ComprehensionCoherentToo complicatedNo answer

ScopeToo littleSufficientToo wideNo answer

No answer

NavigationI can find my way aroundI got ldquolostrdquoNo answer

UseTo get to know the productTo choose a productPlanningTo look for information

My scope of functionsTechnical departmentSalesNo answer

Remarks

(Adobe Reader 7 or higher required) wwwadobecom

Elster GmbH Postfach 2809 middot 49018 Osnabruumlck Strotheweg 1 middot 49504 Lotte (Buumlren) GermanyT +49 541 1214-0 F +49 541 1214-370 infokromschroedercomwwwkromschroedercom

The current addresses of our international agents are available on the Internetwwwkromschroederdeindexphpid=718ampL=1

We reserve the right to make technical modifications in the interests of progressCopyright copy 2015 Elster GmbH All rights reserved

Contact

Feedback

0325

0530

  • Pressure regulators with solenoid valve VAD VAG VAV VAH
  • Flow rate regulator VRH
  • Pressure regulators with double solenoid valve VCD VCG VCV VCH
  • Contents
  • 1 Application
    • 11 Examples of application
      • 111 Constant pressure control
      • 112 Constant pressure control with two gas solenoid valves
      • 113 Constant pressure control with max pressure switch
      • 114 Constant pressure control with non-controlled pilot gas outlet
      • 115 Modulating control
      • 116 Modulating control with two gas solenoid valves
      • 117 Modulating control with two gas solenoid valves and inlet pressure switch
      • 118 HighLow control
      • 119 Zero pressure control
      • 1110 Staged flow rate control
      • 1111 Continuous or staged flow rate control
      • 1112 Modulating control with variable airgas ratio control with gas solenoid valve
      • 1113 Modulating control in residential heat generation
          • 2 Certification
          • 3 Function
            • 31 VAD VAG VAH VRH VAV
              • 311 Pressure regulator for gas VAD
              • 312 Airgas ratio control VAG
              • 313 Flow rate regulators VAH VRH
              • 314 Variable airgas ratio control VAV
              • 315 Pressure regulator with gas solenoid valve VAxS position indicator with visual indicator
                • 32 Animation
                • 33 Connection diagram
                  • 331 VAx with M20 cable gland
                  • 332 VAx with plug
                  • 333 VAS with VADVAGVAHVAV with M20 cable gland
                  • 334 VAS with VADVAGVAHVAV with plug
                      • 4 Replacement possibilities for MODULINE pressure regulators with gas solenoid valve
                        • 41 GVS GVI GVIB GVR and GVRH are to be replaced by VAD VAG VAG+VAS VAH and VAV
                          • 5 Flow rate
                            • 51 Selection example for VAD
                              • 511 Calculate VAD
                                • 52 Selection example for VAG VAH VRH VAV
                                  • 521 CalculateVAG VxHVAV
                                    • 53 Selection example for zero governor VAGN
                                      • 531 Calculate VAGN
                                          • 6 Selection
                                            • 61 Selection table for pressure regulator with solenoid valve VAD
                                            • 62 Type code for VAD
                                            • 63 Selection table for airgas ratio control with solenoid valve VAG flow rate regulators VAH VRH
                                            • 64 Type code for VAG VAH VRH
                                            • 65 Selection table for variable airgas ratio control with solenoid valve VAV
                                            • 66 Type code for VAV
                                            • 67 Accessories
                                              • 7 Project planning information
                                                • 71 Installation
                                                  • 711 Installation position
                                                    • 72 Setting the low-fire rate on VAG VAH VRH VAV
                                                    • 73 Setting the high-fire rate on VAV
                                                      • 731 Calculation
                                                          • 8 Accessories
                                                            • 81 Gas pressure switch DGVC for VAx VRH
                                                            • 82 Gas pressure switch DGVCT for VAxT VRHT
                                                            • 83 Bypass valvepilot gas valve VAS 1
                                                              • 831 VAS 1 attached to VADVAGVAHVAV 1
                                                              • 832 VAS 1 attached to VADVAGVAHVAV 2 VADVAGVAHVAV 3
                                                              • 833 Flow rate
                                                                • 84 Bypass valvepilot gas valve VBY 8 for VADVAGVAHVAV 1
                                                                  • 841 Scope of delivery VBY 8I as bypass valve
                                                                  • 842 Scope of delivery VBY 8R as pilot gas valve
                                                                  • 843 Selection
                                                                  • 844 Type code
                                                                  • 845 Flow rate
                                                                  • 846 Technical data
                                                                    • 85 Tightness control TC 116V
                                                                    • 86 Pressure test points
                                                                    • 87 Cable gland set
                                                                    • 88 Seal set VA 1thinspndashthinsp3
                                                                    • 89 Differential pressure orifice
                                                                    • 810 Retaining frame
                                                                    • 811 Attachment block
                                                                    • 812 Gas control line
                                                                    • 813 Measuring orifice VMO
                                                                    • 814 Filter module VMF
                                                                    • 815 Fine-adjusting valve VMV
                                                                      • 9 Technical data
                                                                        • 91 VAD
                                                                        • 92 VAG
                                                                        • 93 VAH VRH
                                                                        • 94 VAV
                                                                        • 95 Safety-specific characteristic values for VAx 1thinspndashthinsp3
                                                                          • 951 Determining the PFHD value the λD value and the MTTFd value
                                                                          • 952 Calculating the PFHD and PFDavg
                                                                            • 96 Dimensions
                                                                              • 10 Converting units
                                                                              • 11 Maintenance cycles
                                                                              • 12 Glossary
                                                                                • 121 Diagnostic coverage DC
                                                                                • 122 Mode of operation
                                                                                • 123 Category
                                                                                • 124 Common cause failure CCF
                                                                                • 125 Fraction of undetected common cause failures β
                                                                                • 126 B10d value
                                                                                • 127 T10d value
                                                                                • 128 Hardware fault tolerance HFT
                                                                                • 129 Mean dangerous failure rate λD
                                                                                • 1210 Safe failure fraction SFF
                                                                                • 1211 Probability of dangerous failure PFHD
                                                                                • 1212 Mean time to dangerous failure MTTFd
                                                                                • 1213 Demand rate nop
                                                                                • 1214 Average probability of dangerous failure on demand PFDavg
                                                                                  • Feedback
                                                                                  • Contact
                                                                                      1. naechste_Seite 24
                                                                                      2. naechste Seite 18
                                                                                      3. naechste Seite 6
                                                                                      4. naechste Seite 16
                                                                                      5. naechste Seite 14
                                                                                      6. naechste Seite 25
                                                                                      7. naechste_Seite 11
                                                                                      8. naechste_Seite 17
                                                                                      9. fbArbeitspunkt_Min Ja
                                                                                      10. fbArbeitspunkt Ja
                                                                                      11. ftProgramm Standard-Programm
                                                                                      12. fz_kv
                                                                                      13. fz_pe 80
                                                                                      14. fz_pG 60
                                                                                      15. fzDelta_p_Soll 20
                                                                                      16. ftEinheit_Druck mbar
                                                                                      17. fatTyp [115]
                                                                                      18. fbArbeitspunkt_Min_2 Ja
                                                                                      19. fbArbeitspunkt_2 Ja
                                                                                      20. ftRegler_Typ VAG
                                                                                      21. ftProgramm_2 Standard-Programm
                                                                                      22. fz_kv_2
                                                                                      23. fatMedium [08]
                                                                                      24. fzDichte 08
                                                                                      25. ftEinheit_Dichte kgm3
                                                                                      26. fzV_Norm 30
                                                                                      27. ftEinheit_Volstrom m3h
                                                                                      28. fz_pe_2 80
                                                                                      29. fz_pG_2 60
                                                                                      30. fzDelta_p_Soll_2 20
                                                                                      31. ftEinheit_Druck2 [mbar]
                                                                                      32. ftEinheit_Geschw [ms]
                                                                                      33. fatTyp_2 [10954451150103322]
                                                                                      34. fbArbeitspunkt_Min_3 Ja
                                                                                      35. fbArbeitspunkt_3 Ja
                                                                                      36. ftProgramm_3 Standard-Programm
                                                                                      37. fz_kv_3
                                                                                      38. fz_pe_3 20
                                                                                      39. fz_pG_3 0
                                                                                      40. fzDelta_p_Soll_3 20
                                                                                      41. fatTyp_3 [123]
                                                                                      42. fatSchaltleistung [6363683]
                                                                                      43. fz_nop_Stunde 1
                                                                                      44. fz_nop_Jahr 8760
                                                                                      45. fzZyklus 3600
                                                                                      46. fzB10d 6363683
                                                                                      47. fzT10d 10
                                                                                      48. fzPFHd_1V 15714170551864384e-8
                                                                                      49. fzPFDavg_1V
                                                                                      50. ftGeeignet_1V PL d SIL 2
                                                                                      51. fzPFHd_2V 33505832253532625e-10
                                                                                      52. fzPFDavg_2V
                                                                                      53. ftGeeignet_2V PL e SIL 3
                                                                                      54. ftUebersicht Off
                                                                                      55. ftVerstaendlichkeit Off
                                                                                      56. ftFehlende_Info
                                                                                      57. ftUmfang Off
                                                                                      58. ftVerwendung_1 Off
                                                                                      59. ftVerwendung_2 Off
                                                                                      60. ftVerwendung_3 Off
                                                                                      61. ftVerwendung_4 Off
                                                                                      62. ftNavigation Off
                                                                                      63. ftTaetigkeitsbereich Off
                                                                                      64. ftBemerkung
                                                                                      65. Michael Rehkamp Elster Kromschroumlder>btnSenden
Page 29: VAD, VAG, VAV, VAH, VRH, VCD, VCG, VCV, VCH · PDF fileVAD, VAG, VAH, VAV, VRH, VCD, VCG, VCV, VCH · Edition 04.15 6 VAD VAD VAS 1 .1 Examples of application 1 .1 .1 Constant pressure

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 29

Selection

6 3 Selection table for airgas ratio control with solenoid valve VAG flow rate regulators VAH VRH

Type1) T R N F N K P Q Y W S2) G2) R2) L2) M20

cab

le g

land

Plug

with

soc

ket

Plug

with

out s

ocke

t

A B E K A N Scre

w p

lug

Pres

sure

test

poi

ntD

G 1

7VC

3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

Scre

w p

lug

Pres

sure

test

poi

ntD

G 1

7VC

3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

VAG 115 VAG 120 VAG 125 VAG 240 VAG 350

VAH 115 VAH 120 VAH 125 VAH 240 VAH 350

VRH 115 VRH 120 VRH 125 VRH 240 VRH 350

= standard = available1) The following nominal inlet fl ange diameters are also available size 1 with nominal diameter DN 10 size 2 with nominal di-

ameters DN 25 DN 32 and DN 50 size 3 with nominal diameters DN 40 and DN 652) Position indicator and bypasspilot gas valve cannot be fi tted together on the same side3) Specify the test point for inlet pressure pu or outlet pressure pdHelp for selecting the regulators can be found on the ProFi DVD wwwkromschroedercom Products DVD Product fi nder ldquoProFirdquo

Order exampleVAG 240RNWAE

Accessories right Accessories left

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 30

Selection

6 4 Type code for VAG VAH VRHCode DescriptionVAGVAHVRH

Airgas ratio control with solenoid valveFlow rate regulator with solenoid valve

Flow rate regulator1 ndash 3 SizeT T-product15 ndash 50 Nominal inlet and outlet diameterRNF

Rp internal threadNPT internal thread

ISO fl angeN1) Quick opening quick closingK1)

P1)

Q1)

Y1)

W1)

Mains voltage 24 V DCMains voltage 100 V AC 5060 HzMains voltage 120 V AC 5060 HzMains voltage 200 V AC 5060 HzMains voltage 230 V AC 5060 Hz

S1)

G1)Position indicator with visual indicator

Position indicator for 24 V with visual indicatorRL

Viewed from the right (in the direction of fl ow)Viewed from the left (in the direction of fl ow)

AB

Standard valve seatReduced valve seat

EKAN

Connection kit for air control pressure psaVAG VAH VRH compression fi tting

VAG plastic hose couplingVAG VAH VRH NPT 18 adapter

VAG zero governor1) Only available for VAG VAV VAH

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 31

6 5 Selection table for variable airgas ratio control with solenoid valve VAVAccessories right Accessories left

Type1) T R N F N K P Q Y W S2) G2) R2) L2) M20

cab

le g

land

Plug

with

soc

ket

Plug

with

out s

ocke

t

A B E K A Scre

w p

lug

Pres

sure

test

poi

ntD

G 1

7VC

3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

Scre

w p

lug

Pres

sure

test

poi

ntD

G 1

7VC

3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

VAV 115

VAV 120

VAV 125

VAV 240

VAV 350

= standard = available1) The following nominal inlet fl ange diameters are also available size 1 with nominal diameter DN 10 size 2 with nominal diameters DN 25 DN 32 and DN 50 size 3 with nominal diameters DN 40 and DN 652) Position indicator and bypasspilot gas valve cannot be fi tted together on the same side3) Specify the test point for inlet pressure pu or outlet pressure pdHelp for selecting the variable airgas ratio control VAV can be found on the ProFi DVD wwwkromschroedercom

Products DVD Product fi nder ldquoProFirdquo

Order exampleVAV 240RNWAK

Selection

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 32

Selection

6 6 Type code for VAVCode DescriptionVAV Variable airgas ratio control with solenoid valve1 ndash 3 SizeT T-product15 ndash 50 Nominal inlet and outlet diameterRNF

Rp internal threadNPT internal thread

ISO fl angeN Quick opening quick closingKPQYW

Mains voltage 24 V DCMains voltage 100 V AC 5060 HzMains voltage 120 V AC 5060 HzMains voltage 200 V AC 5060 HzMains voltage 230 V AC 5060 Hz

SG

Position indicator with visual indicatorPosition indicator for 24 V with visual indicator

RL

Viewed from the right (in the direction of fl ow)Viewed from the left (in the direction of fl ow)

AB

Standard valve seatReduced valve seat

EKA

Connection kit for air control pressure psa and combus-tion chamber control pressure psc

compression fi ttingplastic hose coupling

NPT 18 adapter

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 33

Selection

6 7 AccessoriesModularly configurable withndash Screw plugsndash Pressure test pointsndash Pressure switch DGVC for inlet

andor outlet pressurendash Tightness control TCndash Bypasspilot gas valve VBY 8 for

size 1ndash Bypasspilot gas valve VAS 1For further information see page 37 (Accessories)

Position indicator

Plug with socket

Plug

Screwplugs

Pressuretest points

Pressure switch DGC Tightness

control TC

Bypasspilot gas valve VBY 8 for size 1

Bypasspilot gas valve VAS 1

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 34

7 Project planning informationDo not store or install the unit in the open airThe inlet pressure pu and the outlet pressure pd can be meas-ured on both sides of the valve body To increase the control accuracy an external impulse line can be connected instead of the pressure test point pd

VAD

pu

pd

(psa)

VAGpd

pu

psa

psa

VAD measurement point for the gas outlet pressure pd on the regulator body A combustion chamber control line (psc) can be connected to connection psa for maintaining a constant burner capacityVAG additional measurement point for the air control pressure psa on the regulator body

VAV

psapsc

pu

pd

VAH VRH

pu

pd-

pdpsa-

psa

VAV measurement point for the outlet pressure pd on the regulator bodyVAH additional measurement points for the outlet pressure pd- and the air control pressure psapsa- on the regulator body

7 1 Installation

GFK

VAGVAH

GFKVAD

Sealing material and thread cuttings must not be allowed to get into the valve housing Install a filter upstream of every system

gt20 mmgt0 79

The unit must not be in contact with masonry Minimum clear-ance 20 mm (079 inches)Ensure that there is sufficient space for installation and ad-justment

le +100 degCle +212 degF

The solenoid body heats up during operation ndash depending on ambient temperature (max 60degC140degF) and intrinsic heating (approx 40degC104degF)

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 35

In the case of double solenoid valves the position of the con-nection box can only be changed by removing the actuator and reinstalling it offset by 90deg or 180deg

If more than three valVario controls are installed in line the controls must be supported

The seals in some gas compression fittings are approved for temperatures of up to 70degC (158degF) This temperature limit will not be exceeded if the flow through the pipe is at least 1 msup3h (3531 SCFH) of gas and the maximum ambient temperature is 50degC (122degF)

7 1 1 Installation position

pu ge 80 mbar(80 hPa32 WC)

VAD VAG VAH VRH VAV

In humid environments black solenoid actuator in the vertical upright position only

VAD VAG VAH VRH black solenoid actuator in the vertical upright position or tilted up to the horizontal not upside downVAG VAH horizontal position only if pu ge 80 mbar (32 WC))VAV installation in the vertical position only black solenoid actuator in the vertical upright positionTo ensure that the airgas ratio control VAG the flow rate regulator VAH VRH or the variable airgas ratio control VAV can react quickly when the load is changed the impulse line for the air control pressure psa and for VAV the impulse line for the combustion chamber control pressure psc should be kept as short as possible The tube internal diameter for the impulse line must always be ge 39 mm (015)

VAH VRHIt is not permitted to install a gas solenoid valve VAS down-stream of flow rate regulator VAH VRH and upstream of fine-adjusting valve VMV The VAS would no longer be able to perform its function as a second safety valve if installed in the above-mentioned position

M

VMV

VAH

VASVAS

pd-

psa-psa

VMV

VAH pd-

psa-psa

The measuring orifice in the air line for impulse lines psa and psa- must always be installed downstream of the air control valve

Project planning information gt Installation

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 36

VAVThe impulse line for the combustion chamber control pres-sure psc must be fitted so that no condensation can enter the pressure regulator but rather flows back into the combustion chamber

7 2 Setting the low-fire rate on VAG VAH VRH VAV

-10 +05-05

ndash

+1

-15

mbar

+15

06

1 152

3

N V

+ +ndash

+30 -15+15

ndash

-3

+5

mbar

-5

N

+

VAG VAH VRH VAV

If the burner operates at low-fire rate the gasair mixture can be changed using the parallel shift of the characteristic curve by turning the adjusting screw ldquoNrdquoAdjusting range at low fire VAG VAH VRH -5 to +5 mbar (-195 to +195 WC) VAV -15 to +15 mbar (-06 to +06 WC)

7 3 Setting the high-fire rate on VAVTo set the high-fire rate the transmission ratio is changed us-ing the adjusting screw ldquoVrdquo until the required flue gas values are achievedTransmission ratio V = pdpsa = 061 to 31The settings N and V can influence each other and must be repeated if necessary

+N+V

-V

-N

VAV

psa [mbar]

p d [m

bar]

7 3 1 CalculationWith no connection to the combustion chamber control pres-sure psc pd = V times psa + NWith connection to the combustion chamber control pressure psc (pd - psc) = V times (psa - psc) + N

Project planning information

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 37

pu pd

21579

4836

085310

189

142

8 Accessories8 1 Gas pressure switch DG VC for VAx VRHType Adjusting range [mbar]DG 17VC 2 to 17DG 40VC 5 to 40DG 110VC 30 to 110DG 300VC 100 to 300

Scope of delivery 1 times pressure switch for gas 2 times retaining screws 2 times sealing rings

8 2 Gas pressure switch DG VCT for VAx T VRH TType Adjusting range [WC]DG 17VCT 08 to 68DG 40VCT 2 to 16DG 110VCT 12 to 44DG 300VCT 40 to 120

Scope of delivery 1 times gas pressure switch with AWG 18 connection wires 2 times retaining screws 2 times sealing ringsMonitoring the inlet pressure pu the electrical plug of the pressure switch for gas points towards the inlet flangeMonitoring the outlet pressure pd the electrical plug of the pressure switch for gas points towards the outlet flange

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 38

A BC

D

FE

ACD

F

B

E

8 3 Bypass valvepilot gas valve VAS 18 3 1 VAS 1 attached to VADVAGVAHVAV 1Scope of delivery A 1 times bypasspilot gas valve VAS 1 B 4 times O-rings C 4 times double nuts D 4 times connection parts E 1 times mounting aidBypass valve VAS 1 F 2 times connection pipes if the bypass valve has a blind flange

at the outlet sidePilot gas valve VAS 1 F 1 times connection pipe 1 times sealing plug if the pilot gas valve

has a threaded flange at the outlet side

Accessories

8 3 2 VAS 1 attached to VADVAGVAHVAV 2 VADVAGVAHVAV 3Scope of delivery A 1 times bypasspilot gas valve VAS 1 B 4 times O-rings C 4 times spacer sleeves D 4 times connection parts E 1 times mounting aidBypass valve VAS 1 F 2 times connection pipes if the bypass valve has a blind flange

at the outlet sidePilot gas valve VAS 1 F 1 times connection pipe 1 times sealing plug if the pilot gas valve

has a threaded flange at the outlet side

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 39

2

3

456

810

20

30

405060

80100

∆p [m

bar]

005 01 02 03 05 08 1 2 3 4 51

3

2

Qn [m3h]

1

01

02

03

0405

08

003

002

6 8 10

005 01 02 03 05 08 1 2 3 4 5003 6 8 10

20

005 01 02 03 05 08 1 2 3 4 5003 6 8 10 20

30

∆p [i

nch

WC]

1

2

3

456

810

20

30

40

04

004

006

00801

02

03

0506

08

Qn [SCFH]10 40 60 100 200 3001 500 10002 3 4 5

120 306 8

21 3 4 5 6 7 8 910

8 3 3 Flow rate

The characteristic flow rate curves have been measured for bypass valve VAS 1 with connection pipe diameter 1 to 10 mm (004 to 04) and for the pilot gas valve with 10 mm (04) connection pipe

Bypass valve connection pipe diameter [mm]

Pilo

t gas

val

ve 1

0 m

m (0

4)

conn

ectio

n pi

pe d

iam

eter

Accessories gt Bypass valvepilot gas valve VAS 1

= natural gas (ρ = 080 kgm3) = propane (ρ = 201 kgm3) = air (ρ = 129 kgm3)

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 40

Accessories

8 4 Bypass valvepilot gas valve VBY 8 for VADVAGVAHVAV 1

B

C

AVBY 8

VAx 1

55

(217)40(157)

70 (276)

80(315)

Rp frac14(pilot gas valve)

For mounting on VAD VAG VAH VAV 1 and double solenoid valve VCD VCG VCH VCV 1

8 4 1 Scope of delivery VBY 8I as bypass valveA 1 times bypass valve VBY 8IB 2 times retaining screws with 4 times O-rings both retaining screws

have a bypass orificeC 1 times grease for o-rings

8 4 2 Scope of delivery VBY 8R as pilot gas valveA 1 times pilot gas valve VBY 8RB 2 times retaining screws with 5 x O-rings one retaining screw

has a bypass orifice (2 x O-rings) the other does not (3 x O-rings)

C 1 times grease for O-rings

8 4 3 SelectionType I R W Q K 6L -R -L E B D 05

VBY 8

Order exampleVBY 8RW6L-LED

8 4 4 Type codeCode DescriptionVBY Gas solenoid valve8 Nominal sizeIR

For internal gas pick-up as bypass valveFor external gas pick-up as pilot gas valve

KQW

Mains voltage 24 V DC Mains voltage 120 V AC 5060 HzMains voltage 230 V AC 5060 Hz

6L Electrical connection via plug and socket with LED-R-L

Attachment side of main valve right-hand sideAttachment side of main valve left-hand side

EB

Attached to the VAxEnclosed (separate packing unit)

05D

Nozzle diameter = 05 mm (002)Flow adjustment

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 41

2

01

02

03

05

081

3

456

810

20

30

405060

80100

∆p [m

bar]

1

3

201 02 03 05 1 2 3001 003 4

Qn [m3h]

02 03 05 1 2

01 02 05

002 006

002

002 006 1

0010006 005 01

001

0003

0006 2 3

VBY 8DVBY 805

∆p [i

nch

WC]

1

2

3

456

810

20

30

40

040506

08

1

Qn [SCFH]10 40 60 1005 2081 2 30402

01

02

03

004005006

008

Adjusting range

8 4 5 Flow rateVBY 8 D

+

-

The flow rate can be set by turning the flow rate restrictor (4 mm016 Allen screw) frac14 of a turn Flow rate 10 to 100

VBY 8 05The flow is routed through a 05 mm (002) nozzle and thus has a fixed characteristic flow rate curve Adjustment is not possible

8 4 6 Technical dataInlet pressure pu max 500 mbar (7 psig)Ambient temperature 0 to +60degC (32 to 140degF) no condensation permittedStorage temperature 0 to +40degC (32 to 104degF) no condensation permittedPower consumption 24 V = 8 W 120 V = 8 W 230 V = 95 WEnclosure IP 54

Accessories gt Bypass valvepilot gas valve VBY 8 for VADVAGVAHVAV 1

= natural gas (ρ = 080 kgm3) = propane (ρ = 201 kgm3) = air (ρ = 129 kgm3)

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 42

TC 116VB C

56(22)

49(193)

27(106)

A

A

VCx 1 VCx 2VCx 3

8 5 Tightness control TC 116Vfor VAx 1 ndash 3An adapter plate is required to attach the tightness control to the right- or left-hand side of the pressure regulator with gas solenoid valveScope of delivery A 1 times adapter plate B 2 times O-rings C 2 times retaining screwsFor attachment to left-hand side Order No 74922391 right-hand side Order No 74921995

8 6 Pressure test pointsTest points to check the inlet pressure pu and outlet pressure pdScope of delivery 1 x pressure test points with 1 x profiled sealing rings Order No 74923390

8 7 Cable gland setWhen wiring a double solenoid valve with pressure regula-tor VCx the connection boxes are to be connected using a cable gland setThe cable gland set can only be used if the connection boxes are at the same height and on the same side and if both valves are equipped either with or without a proof of closure switchVA 1 Order No 74921985 VA 2 Order No 74921986 VA 3 Order No 74921987

Accessories

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 43

A B

D

C

Accessories

8 9 Differential pressure orifice

Size PipeDN

Differential pressure orifi cewith outlet dia

1 15 17 mm 0671 20 25 mm 0981 25 30 mm 1182 40 46 mm 1813 50 58 mm 228

If pressure regulator VADVAGVAV 1 is retrofitted upstream of gas solenoid valve VAS 1 a DN 25 differential pressure orifice with outlet opening d = 30 mm (118) must be inserted at the outlet of the pressure regulatorIn the case of pressure regulator VAx 115 or VAx 120 the DN 25 differential pressure orifice must be ordered separately and retrofitted Order No 74922240

8 8 Seal set VA 1 ndash 3VA 1 Order No 74921988 VA 2 Order No 74921989 VA 3 Order No 74921990Scope of deliveryA 1 times double block seal B 2 times O-rings (flange) C 2 times O-rings (pressure switch) for pressure test pointscrew plug D 2 times sealing rings (flat sealing) and 2 times profiled sealing rings

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 44

BA

C

pd-

8 11 Attachment blockFor locked installation of pressure gauge and other acces-soriesScope of delivery A 1 times attachment block B 2 times self-tapping screws for installation C 2 times O-rings

Accessories

8 10 Retaining frameIn the event that a pressure regulator VAx is installed at a later point upstream of a gas solenoid valve VAS a measur-ing orifice VMO or a fine-adjusting valve VMV the retaining frame must be fitted at the inlet of the second device in order to fasten the differential pressure orifice at the regulator outlet Order the retaining frame separatelyRetaining frame for Size 1 Order No 74923029 Size 2 Order No 74923030 Size 3 Order No 74923031

8 12 Gas control lineFine-adjusting valve VMV can be installed on the flow rate regulator VAH for fine adjustment of the gas flow rateThe gas control line for gas outlet pressure pd- is available with 2 18 compression fittingsSize 1 Order No 74924458 Size 2 Order No 74924459

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 45

8 13 Measuring orifice VMOThe measuring orifice VMO is designed to reduce the gas and air flow rates and is installed downstream of the valVario control The measuring orifice is available with Rp internal thread (NPT internal thread) or flange to ISO 7005See wwwdocuthekcom Elster Kromschroumlder Krom-schroumlder LBE Products 03 Valves and butterfly valves valVario accessories Type of document Technical Informa-tion VMO

Accessories

8 14 Filter module VMFUsing the filter module VMF the gas flow upstream of the gas solenoid valve VAS and the airgas ratio control is cleaned The filter module is available with Rp internal thread (NPT internal thread) or flange to ISO 7005 and can also be supplied with fitted pressure switch as an optionSee wwwdocuthekcom Elster Kromschroumlder Krom-schroumlder LBE Products 03 Valves and butterfly valves valVario accessories Type of document Technical Informa-tion VMF

8 15 Fine-adjusting valve VMVThe flow rate is set using the fine-adjusting valve VMV The fine-adjusting valve is available with Rp internal thread (NPT internal thread) or flange to ISO 7005See wwwdocuthekcom Elster Kromschroumlder Krom-schroumlder LBE Products 03 Valves and butterfly valves valVario accessories Type of document Technical Infor-mation VMV

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 46

9 Technical dataGas types natural gas LPG (gaseous) biologically produced methane (max 01 -by-vol H2S) or clean air other gases on request The gas must be clean and dry in all temperature conditions and must not contain condensateCE and FM approved UL listed max inlet pressure pu 10 ndash 500 mbar (4 ndash 200 WC) FM approved (230 V AC 120 V AC 24 V DC) non opera-tional pressure 700 mbar (10 psig)ANSICSA approved (230 V AC 120 V AC 24 V DC) up to 350 mbar (5 psig)Opening time of the solenoid valve quick opening le 05 s Closing time quick closing lt 1 sMedium and ambient temperatures -20 to +60degC (-4 to +140degF) no condensation permittedStorage temperature -20 to +40degC (-4 to +104degF)Enclosure IP 65Valve housing aluminium valve seal NBRConnection flanges with internal thread Rp to ISO 7-1 NPT to ANSIASMESafety valve Class A to EN 161 Factory Mutual Research Class 7400 Process Control Valves (230 V AC 120 V AC 24 V DC) ANSI Z2121 and CSA 65 ANSI Z2118 and CSA 63Control class A to EN 88-1Control range up to 101

Mains voltage 230 V AC +10-15 5060 Hz 200 V AC +10-15 5060 Hz 120 V AC +10-15 5060 Hz 100 V AC +10-15 5060 Hz 24 V DC plusmn20Duty cycle 100Power factor of the solenoid coil cos φ = 09Power consumption

Type Voltage Power

VAx 1

24 V DC 25 W ndash100 V AC 25 W (26 VA)120 V AC 25 W (26 VA)200 V AC 25 W (26 VA)230 V AC 25 W (26 VA)

VAx 2 VAx 3

24 V DC 36 W ndash100 V AC 36 W (40 VA)120 V AC 40 W (44 VA)200 V AC 40 W (44 VA)230 V AC 40 W (44 VA)

VBY24 V DC 8 W ndash

120 V AC 8 W ndash230 V AC 95 W ndash

Cable gland M20 times 15Electrical connection cable with max 25 mm2 (AWG 12) or plug with socket to EN 175301-803

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 47

Position indicator contact rating

Type Voltage Min current(resistive load)

Max current(resistive load)

VAxS VCxS 12 ndash 250 V AC 5060 Hz 100 mA 3 AVAxG VCxG 12 ndash 30 V DC 2 mA 01 A

Position indicator switching frequency max 5 times per minute

Switching current [A]

Switching cyclescos φ = 1 cos φ = 06

01 500000 50000005 300000 250000

1 200000 1000003 100000 ndash

Limited to max 200000 cycles for heating systems

9 1 VADOutlet pressure pd VAD-25 25 ndash 25 mbar (1 ndash 10 WC) VAD-50 20 ndash 50 mbar (8 ndash 20 WC) VAD-100 35 ndash 100 mbar (14 ndash 40 WC)Combustion chamber control pressure psc (connection psa)

-20 to +20 mbar (-78 to +78 WC)

VAD

pu

pd

(psa)

9 2 VAGOutlet pressure pd 05 ndash 100 mbar (02 ndash 40 WC)Air control pressure psa 05 ndash 100 mbar (02 ndash 40 WC)

Adjusting range at low fire plusmn5 mbar (plusmn2 WC)Transmission ratio of gas to air 11The inlet pressure must always be higher than the air control pressure psa + pressure loss ∆p + 5 mbar (2 WC)

VAGpd

pu

psa

psa

VAGK 1 x 18 coupling for plastic hose (internal dia 39 mm (015) external dia 61 mm (024)) or VAGE 1 x 18 compression fitting for 6 times 1 tube or VAGA 1 x NPT 18 adapter or VAGN zero governor with breathing orifice

9 3 VAH VRHAir control pressure psa 06 ndash 100 mbar (024 ndash 40 WC) Differential air pressure ∆psa (psa - psa-) 06 ndash 50 mbar (024 ndash 197 WC) Differential gas pressure ∆pd (pd - pd-) 06 ndash 50 mbar (024 ndash 197 WC)Transmission ratio of gas to air 11The inlet pressure must always be higher than the differen-tial air pressure ∆psa + pressure loss ∆p + max gas pres-sure on burner + 5 mbar (2 WC)Adjusting range at low fire plusmn5 mbar (plusmn2 WC)

Technical data

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 48

VAHVRH

pd-

pu

psa-

psa

Connection of the air control pressure psaVAHE VRHE 3 x 18 compression fitting for 6 times 1 tube or VAHA VRHA 3 x NPT 18 adapter

9 4 VAVOutlet pressure pd 05 ndash 30 mbar (02 ndash 117 WC)Air control pressure psa 04 ndash 30 mbar (015 ndash 117 WC)Combustion chamber control pressure psc

-20 to +20 mbar (-78 to +78 WC)Min control pressure differential psa - psc 04 mbar (015 WC)Min pressure differential pd - psc 05 mbar (02 WC)Adjusting range at low fire plusmn15 mbar (plusmn06 WC)Transmission ratio of gas to air 061 to 31The inlet pressure pu must always be higher than the air control pressure psa times transmission ratio V + pressure loss ∆p + 15 mbar (06 WC)

pu

pd psapsc

VAV

VAVK 2 x plastic hose couplings (internal dia 39 mm (015) external dia 61 mm (024)) or VAVE 2 x 18 compression fitting for 6 times 1 tube or VAVA 2 x NPT 18 adapter

Technical data

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 49

9 5 Safety-specific characteristic values for VAx 1 ndash 3For SILSuitable for Safety Integrity Level SIL 1 2 3

Diagnostic coverage DC 0

Type of subsystem Type A to EN 61508-2 74312

Operating mode High demand mode pursu-ant to EN 61508-4 3512

For PLSuitable for Performance Level PL a b c d e

Category B 1 2 3 4Common cause failure CCF gt 65Application of essential safety requirements Satisfied

Application of tried-and-tested safety requirements Satisfied

For SIL and PL

B10d value

Operating cyclesVAD VAG VAV VAH 1 10094360VAD VAG VAV VAH 2 8229021VAD VAG VAV VAH 3 6363683

Hardware fault tolerance (1 valve) HFT 0

Hardware fault tolerance (2 valves) HFT 1

Safe failure fraction SFF gt 90Fraction of undetected com-mon cause failures β ge 2

Max service life under operating conditions10 years after date of production plus max 12 year in stor-age prior to first use or once the given number of operating cycles has been reached depending on which is achieved firstThe devices are suitable for single-channel systems (HFT = 0) up to SIL 2PL d and up to SIL 3PL e when two re-dundant valves are installed in a double-channel architecture (HFT = 1) provided that the complete system complies with the requirements of EN 61508ISO 13849

For a glossary of terms see page 53 (Glossary)

Technical data

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 50

nop 1hnop 1a

sB10d

T10d aPFHD (1 VAx) 1h

PFHD (2 VAx) 1h

PFDavg (1 VAx)

PFDavg (2 VAx)

Technical data gt Safety-specific characteristic values for VAx 1 ndash 3

9 5 1 Determining the PFHD value the λD value and the MTTFd value

PFHD = λD = x nop= 1MTTFd

01B10d

PFDavg = x λD x 24 x 365 x T10d 12

Type

Cycle time

suitable for

suitable for

PFHD = Probability of dangerous failure (HDM = high de-mand mode) [1hour]PFDavg = Average probability of dangerous failure on de-mand (LDM = low demand mode)λD = Mean dangerous failure rate [1hour]MTTFd = Mean time to dangerous failure [hours]nop = Demand rate (mean number of annual operations) [1hour]

9 5 2 Calculating the PFHD and PFDavg

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 51

VAD VAG VAH VAV

H1

Rp frac14(NPT frac14)

H2

E

LF

F

H4

H3

B

VAxS VAxF

L2G

G

Technical data

9 6 Dimensions

Type

Connec-tion Dimensions

WeightRpNPT DN

L L2 E F G H1 H2 H3 H4 Bmm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch kg lbs

VAx 115 12 15 75 29 ndash ndash 75 29 15 06 ndash ndash 143 56 82 32 161 63 117 46 97 38 18 40VAH 115 12 15 75 29 ndash ndash 75 29 15 06 ndash ndash 143 56 100 39 161 63 135 53 97 38 2 44VAx 120 34 20 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 82 33 161 63 117 46 97 38 19 42VAH 120 34 20 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 100 39 161 63 135 53 97 38 21 46VAx 125 1 25 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 82 33 161 63 117 46 97 38 19 42VAH 125 1 25 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 100 39 161 63 135 53 97 38 21 46VAx 240 112 40 128 50 200 79 85 33 29 11 66 26 170 67 112 44 191 75 162 64 125 49 44 97VAH 240 112 40 128 50 200 79 85 33 29 11 66 26 170 67 132 52 191 75 182 72 125 49 47 104VAx 350 2 50 155 61 230 91 85 33 36 14 74 29 180 70 135 53 201 79 196 77 160 63 61 134VAH 350 2 50 155 61 230 91 85 33 36 14 74 29 180 70 156 61 201 79 217 85 160 63 64 141

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 52

10 Converting unitssee wwwadlatusorg

11 Maintenance cyclesAt least once per annum at least twice per annum for biologi-cally produced methaneIf the flow rate drops clean the strainer

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 53

12 Glossary12 1 Diagnostic coverage DCMeasure of the effectiveness of diagnostics which may be determined as the ratio between the failure rate of detected dangerous failures and the failure rate of total dangerous failuresNOTE Diagnostic coverage can exist for the whole or parts of a safety-related system For example diagnostic cover-age could exist for sensors andor logic system andor final elements Unit see EN ISO 13849-12008

12 2 Mode of operationHigh demand mode or continuous modeOperating mode where the frequency of demands for opera-tion made on a safety-related system is greater than one per year or greater than twice the proof-test frequencysee EN 61508-42008

12 3 CategoryClassification of the safety-related parts of a control system in respect of their resistance to faults and their subsequent behaviour in the fault condition and which is achieved by the structural arrangement of the parts fault detection andor by their reliability see EN ISO 13849-12008

12 4 Common cause failure CCFFailures of different items resulting from a single event where these failures are not consequences of each othersee EN ISO 13849-12008

12 5 Fraction of undetected common cause failures β Fraction of undetected failures of redundant components due to a single event whereby these failures are not based on mutual causesNOTE β is expressed as a fraction in the equations and as a percentage elsewheresee EN 61508-62010

12 6 B10d valueMean number of cycles until 10 of the components fail dan-gerouslysee EN ISO 13849-12008

12 7 T10d valueMean time until 10 of the components fail dangerouslysee EN ISO 13849-12008

12 8 Hardware fault tolerance HFTA hardware fault tolerance of N means that N + 1 is the mini-mum number of faults that could cause a loss of the safety functionsee IEC 61508-22010

12 9 Mean dangerous failure rate λD Mean rate of dangerous failures during operation time (T10d) Unit 1hsee EN ISO 13849-12008

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 54

12 10 Safe failure fraction SFFFraction of safe failures related to all failures which are as-sumed to appearsee EN 13611A22011

12 11 Probability of dangerous failure PFHD Value describing the likelihood of dangerous failure per hour of a component for high demand mode or continuous mode Unit 1hsee EN 13611A22011

12 12 Mean time to dangerous failure MTTFd Expectation of the mean time to dangerous failuresee EN ISO 13849-12008

12 13 Demand rate nop Mean number of annual operationssee EN ISO 13849-12008

12 14 Average probability of dangerous failure on demand PFDavg (LDM = 1 ndash 10 switching cyclesyear)Average probability of a dangerous failure of the safety function on demand (LDM = low demand mode)see EN 61508-6

Glossary

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415

Finally we are offering you the opportunity to assess this ldquoTechnical Information (TI)rdquo and to give us your opinion so that we can improve our documents further and suit them to your needs

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ComprehensionCoherentToo complicatedNo answer

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No answer

NavigationI can find my way aroundI got ldquolostrdquoNo answer

UseTo get to know the productTo choose a productPlanningTo look for information

My scope of functionsTechnical departmentSalesNo answer

Remarks

(Adobe Reader 7 or higher required) wwwadobecom

Elster GmbH Postfach 2809 middot 49018 Osnabruumlck Strotheweg 1 middot 49504 Lotte (Buumlren) GermanyT +49 541 1214-0 F +49 541 1214-370 infokromschroedercomwwwkromschroedercom

The current addresses of our international agents are available on the Internetwwwkromschroederdeindexphpid=718ampL=1

We reserve the right to make technical modifications in the interests of progressCopyright copy 2015 Elster GmbH All rights reserved

Contact

Feedback

0325

0530

  • Pressure regulators with solenoid valve VAD VAG VAV VAH
  • Flow rate regulator VRH
  • Pressure regulators with double solenoid valve VCD VCG VCV VCH
  • Contents
  • 1 Application
    • 11 Examples of application
      • 111 Constant pressure control
      • 112 Constant pressure control with two gas solenoid valves
      • 113 Constant pressure control with max pressure switch
      • 114 Constant pressure control with non-controlled pilot gas outlet
      • 115 Modulating control
      • 116 Modulating control with two gas solenoid valves
      • 117 Modulating control with two gas solenoid valves and inlet pressure switch
      • 118 HighLow control
      • 119 Zero pressure control
      • 1110 Staged flow rate control
      • 1111 Continuous or staged flow rate control
      • 1112 Modulating control with variable airgas ratio control with gas solenoid valve
      • 1113 Modulating control in residential heat generation
          • 2 Certification
          • 3 Function
            • 31 VAD VAG VAH VRH VAV
              • 311 Pressure regulator for gas VAD
              • 312 Airgas ratio control VAG
              • 313 Flow rate regulators VAH VRH
              • 314 Variable airgas ratio control VAV
              • 315 Pressure regulator with gas solenoid valve VAxS position indicator with visual indicator
                • 32 Animation
                • 33 Connection diagram
                  • 331 VAx with M20 cable gland
                  • 332 VAx with plug
                  • 333 VAS with VADVAGVAHVAV with M20 cable gland
                  • 334 VAS with VADVAGVAHVAV with plug
                      • 4 Replacement possibilities for MODULINE pressure regulators with gas solenoid valve
                        • 41 GVS GVI GVIB GVR and GVRH are to be replaced by VAD VAG VAG+VAS VAH and VAV
                          • 5 Flow rate
                            • 51 Selection example for VAD
                              • 511 Calculate VAD
                                • 52 Selection example for VAG VAH VRH VAV
                                  • 521 CalculateVAG VxHVAV
                                    • 53 Selection example for zero governor VAGN
                                      • 531 Calculate VAGN
                                          • 6 Selection
                                            • 61 Selection table for pressure regulator with solenoid valve VAD
                                            • 62 Type code for VAD
                                            • 63 Selection table for airgas ratio control with solenoid valve VAG flow rate regulators VAH VRH
                                            • 64 Type code for VAG VAH VRH
                                            • 65 Selection table for variable airgas ratio control with solenoid valve VAV
                                            • 66 Type code for VAV
                                            • 67 Accessories
                                              • 7 Project planning information
                                                • 71 Installation
                                                  • 711 Installation position
                                                    • 72 Setting the low-fire rate on VAG VAH VRH VAV
                                                    • 73 Setting the high-fire rate on VAV
                                                      • 731 Calculation
                                                          • 8 Accessories
                                                            • 81 Gas pressure switch DGVC for VAx VRH
                                                            • 82 Gas pressure switch DGVCT for VAxT VRHT
                                                            • 83 Bypass valvepilot gas valve VAS 1
                                                              • 831 VAS 1 attached to VADVAGVAHVAV 1
                                                              • 832 VAS 1 attached to VADVAGVAHVAV 2 VADVAGVAHVAV 3
                                                              • 833 Flow rate
                                                                • 84 Bypass valvepilot gas valve VBY 8 for VADVAGVAHVAV 1
                                                                  • 841 Scope of delivery VBY 8I as bypass valve
                                                                  • 842 Scope of delivery VBY 8R as pilot gas valve
                                                                  • 843 Selection
                                                                  • 844 Type code
                                                                  • 845 Flow rate
                                                                  • 846 Technical data
                                                                    • 85 Tightness control TC 116V
                                                                    • 86 Pressure test points
                                                                    • 87 Cable gland set
                                                                    • 88 Seal set VA 1thinspndashthinsp3
                                                                    • 89 Differential pressure orifice
                                                                    • 810 Retaining frame
                                                                    • 811 Attachment block
                                                                    • 812 Gas control line
                                                                    • 813 Measuring orifice VMO
                                                                    • 814 Filter module VMF
                                                                    • 815 Fine-adjusting valve VMV
                                                                      • 9 Technical data
                                                                        • 91 VAD
                                                                        • 92 VAG
                                                                        • 93 VAH VRH
                                                                        • 94 VAV
                                                                        • 95 Safety-specific characteristic values for VAx 1thinspndashthinsp3
                                                                          • 951 Determining the PFHD value the λD value and the MTTFd value
                                                                          • 952 Calculating the PFHD and PFDavg
                                                                            • 96 Dimensions
                                                                              • 10 Converting units
                                                                              • 11 Maintenance cycles
                                                                              • 12 Glossary
                                                                                • 121 Diagnostic coverage DC
                                                                                • 122 Mode of operation
                                                                                • 123 Category
                                                                                • 124 Common cause failure CCF
                                                                                • 125 Fraction of undetected common cause failures β
                                                                                • 126 B10d value
                                                                                • 127 T10d value
                                                                                • 128 Hardware fault tolerance HFT
                                                                                • 129 Mean dangerous failure rate λD
                                                                                • 1210 Safe failure fraction SFF
                                                                                • 1211 Probability of dangerous failure PFHD
                                                                                • 1212 Mean time to dangerous failure MTTFd
                                                                                • 1213 Demand rate nop
                                                                                • 1214 Average probability of dangerous failure on demand PFDavg
                                                                                  • Feedback
                                                                                  • Contact
                                                                                      1. naechste_Seite 24
                                                                                      2. naechste Seite 18
                                                                                      3. naechste Seite 6
                                                                                      4. naechste Seite 16
                                                                                      5. naechste Seite 14
                                                                                      6. naechste Seite 25
                                                                                      7. naechste_Seite 11
                                                                                      8. naechste_Seite 17
                                                                                      9. fbArbeitspunkt_Min Ja
                                                                                      10. fbArbeitspunkt Ja
                                                                                      11. ftProgramm Standard-Programm
                                                                                      12. fz_kv
                                                                                      13. fz_pe 80
                                                                                      14. fz_pG 60
                                                                                      15. fzDelta_p_Soll 20
                                                                                      16. ftEinheit_Druck mbar
                                                                                      17. fatTyp [115]
                                                                                      18. fbArbeitspunkt_Min_2 Ja
                                                                                      19. fbArbeitspunkt_2 Ja
                                                                                      20. ftRegler_Typ VAG
                                                                                      21. ftProgramm_2 Standard-Programm
                                                                                      22. fz_kv_2
                                                                                      23. fatMedium [08]
                                                                                      24. fzDichte 08
                                                                                      25. ftEinheit_Dichte kgm3
                                                                                      26. fzV_Norm 30
                                                                                      27. ftEinheit_Volstrom m3h
                                                                                      28. fz_pe_2 80
                                                                                      29. fz_pG_2 60
                                                                                      30. fzDelta_p_Soll_2 20
                                                                                      31. ftEinheit_Druck2 [mbar]
                                                                                      32. ftEinheit_Geschw [ms]
                                                                                      33. fatTyp_2 [10954451150103322]
                                                                                      34. fbArbeitspunkt_Min_3 Ja
                                                                                      35. fbArbeitspunkt_3 Ja
                                                                                      36. ftProgramm_3 Standard-Programm
                                                                                      37. fz_kv_3
                                                                                      38. fz_pe_3 20
                                                                                      39. fz_pG_3 0
                                                                                      40. fzDelta_p_Soll_3 20
                                                                                      41. fatTyp_3 [123]
                                                                                      42. fatSchaltleistung [6363683]
                                                                                      43. fz_nop_Stunde 1
                                                                                      44. fz_nop_Jahr 8760
                                                                                      45. fzZyklus 3600
                                                                                      46. fzB10d 6363683
                                                                                      47. fzT10d 10
                                                                                      48. fzPFHd_1V 15714170551864384e-8
                                                                                      49. fzPFDavg_1V
                                                                                      50. ftGeeignet_1V PL d SIL 2
                                                                                      51. fzPFHd_2V 33505832253532625e-10
                                                                                      52. fzPFDavg_2V
                                                                                      53. ftGeeignet_2V PL e SIL 3
                                                                                      54. ftUebersicht Off
                                                                                      55. ftVerstaendlichkeit Off
                                                                                      56. ftFehlende_Info
                                                                                      57. ftUmfang Off
                                                                                      58. ftVerwendung_1 Off
                                                                                      59. ftVerwendung_2 Off
                                                                                      60. ftVerwendung_3 Off
                                                                                      61. ftVerwendung_4 Off
                                                                                      62. ftNavigation Off
                                                                                      63. ftTaetigkeitsbereich Off
                                                                                      64. ftBemerkung
                                                                                      65. Michael Rehkamp Elster Kromschroumlder>btnSenden
Page 30: VAD, VAG, VAV, VAH, VRH, VCD, VCG, VCV, VCH · PDF fileVAD, VAG, VAH, VAV, VRH, VCD, VCG, VCV, VCH · Edition 04.15 6 VAD VAD VAS 1 .1 Examples of application 1 .1 .1 Constant pressure

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 30

Selection

6 4 Type code for VAG VAH VRHCode DescriptionVAGVAHVRH

Airgas ratio control with solenoid valveFlow rate regulator with solenoid valve

Flow rate regulator1 ndash 3 SizeT T-product15 ndash 50 Nominal inlet and outlet diameterRNF

Rp internal threadNPT internal thread

ISO fl angeN1) Quick opening quick closingK1)

P1)

Q1)

Y1)

W1)

Mains voltage 24 V DCMains voltage 100 V AC 5060 HzMains voltage 120 V AC 5060 HzMains voltage 200 V AC 5060 HzMains voltage 230 V AC 5060 Hz

S1)

G1)Position indicator with visual indicator

Position indicator for 24 V with visual indicatorRL

Viewed from the right (in the direction of fl ow)Viewed from the left (in the direction of fl ow)

AB

Standard valve seatReduced valve seat

EKAN

Connection kit for air control pressure psaVAG VAH VRH compression fi tting

VAG plastic hose couplingVAG VAH VRH NPT 18 adapter

VAG zero governor1) Only available for VAG VAV VAH

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 31

6 5 Selection table for variable airgas ratio control with solenoid valve VAVAccessories right Accessories left

Type1) T R N F N K P Q Y W S2) G2) R2) L2) M20

cab

le g

land

Plug

with

soc

ket

Plug

with

out s

ocke

t

A B E K A Scre

w p

lug

Pres

sure

test

poi

ntD

G 1

7VC

3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

Scre

w p

lug

Pres

sure

test

poi

ntD

G 1

7VC

3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

VAV 115

VAV 120

VAV 125

VAV 240

VAV 350

= standard = available1) The following nominal inlet fl ange diameters are also available size 1 with nominal diameter DN 10 size 2 with nominal diameters DN 25 DN 32 and DN 50 size 3 with nominal diameters DN 40 and DN 652) Position indicator and bypasspilot gas valve cannot be fi tted together on the same side3) Specify the test point for inlet pressure pu or outlet pressure pdHelp for selecting the variable airgas ratio control VAV can be found on the ProFi DVD wwwkromschroedercom

Products DVD Product fi nder ldquoProFirdquo

Order exampleVAV 240RNWAK

Selection

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 32

Selection

6 6 Type code for VAVCode DescriptionVAV Variable airgas ratio control with solenoid valve1 ndash 3 SizeT T-product15 ndash 50 Nominal inlet and outlet diameterRNF

Rp internal threadNPT internal thread

ISO fl angeN Quick opening quick closingKPQYW

Mains voltage 24 V DCMains voltage 100 V AC 5060 HzMains voltage 120 V AC 5060 HzMains voltage 200 V AC 5060 HzMains voltage 230 V AC 5060 Hz

SG

Position indicator with visual indicatorPosition indicator for 24 V with visual indicator

RL

Viewed from the right (in the direction of fl ow)Viewed from the left (in the direction of fl ow)

AB

Standard valve seatReduced valve seat

EKA

Connection kit for air control pressure psa and combus-tion chamber control pressure psc

compression fi ttingplastic hose coupling

NPT 18 adapter

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 33

Selection

6 7 AccessoriesModularly configurable withndash Screw plugsndash Pressure test pointsndash Pressure switch DGVC for inlet

andor outlet pressurendash Tightness control TCndash Bypasspilot gas valve VBY 8 for

size 1ndash Bypasspilot gas valve VAS 1For further information see page 37 (Accessories)

Position indicator

Plug with socket

Plug

Screwplugs

Pressuretest points

Pressure switch DGC Tightness

control TC

Bypasspilot gas valve VBY 8 for size 1

Bypasspilot gas valve VAS 1

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 34

7 Project planning informationDo not store or install the unit in the open airThe inlet pressure pu and the outlet pressure pd can be meas-ured on both sides of the valve body To increase the control accuracy an external impulse line can be connected instead of the pressure test point pd

VAD

pu

pd

(psa)

VAGpd

pu

psa

psa

VAD measurement point for the gas outlet pressure pd on the regulator body A combustion chamber control line (psc) can be connected to connection psa for maintaining a constant burner capacityVAG additional measurement point for the air control pressure psa on the regulator body

VAV

psapsc

pu

pd

VAH VRH

pu

pd-

pdpsa-

psa

VAV measurement point for the outlet pressure pd on the regulator bodyVAH additional measurement points for the outlet pressure pd- and the air control pressure psapsa- on the regulator body

7 1 Installation

GFK

VAGVAH

GFKVAD

Sealing material and thread cuttings must not be allowed to get into the valve housing Install a filter upstream of every system

gt20 mmgt0 79

The unit must not be in contact with masonry Minimum clear-ance 20 mm (079 inches)Ensure that there is sufficient space for installation and ad-justment

le +100 degCle +212 degF

The solenoid body heats up during operation ndash depending on ambient temperature (max 60degC140degF) and intrinsic heating (approx 40degC104degF)

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 35

In the case of double solenoid valves the position of the con-nection box can only be changed by removing the actuator and reinstalling it offset by 90deg or 180deg

If more than three valVario controls are installed in line the controls must be supported

The seals in some gas compression fittings are approved for temperatures of up to 70degC (158degF) This temperature limit will not be exceeded if the flow through the pipe is at least 1 msup3h (3531 SCFH) of gas and the maximum ambient temperature is 50degC (122degF)

7 1 1 Installation position

pu ge 80 mbar(80 hPa32 WC)

VAD VAG VAH VRH VAV

In humid environments black solenoid actuator in the vertical upright position only

VAD VAG VAH VRH black solenoid actuator in the vertical upright position or tilted up to the horizontal not upside downVAG VAH horizontal position only if pu ge 80 mbar (32 WC))VAV installation in the vertical position only black solenoid actuator in the vertical upright positionTo ensure that the airgas ratio control VAG the flow rate regulator VAH VRH or the variable airgas ratio control VAV can react quickly when the load is changed the impulse line for the air control pressure psa and for VAV the impulse line for the combustion chamber control pressure psc should be kept as short as possible The tube internal diameter for the impulse line must always be ge 39 mm (015)

VAH VRHIt is not permitted to install a gas solenoid valve VAS down-stream of flow rate regulator VAH VRH and upstream of fine-adjusting valve VMV The VAS would no longer be able to perform its function as a second safety valve if installed in the above-mentioned position

M

VMV

VAH

VASVAS

pd-

psa-psa

VMV

VAH pd-

psa-psa

The measuring orifice in the air line for impulse lines psa and psa- must always be installed downstream of the air control valve

Project planning information gt Installation

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 36

VAVThe impulse line for the combustion chamber control pres-sure psc must be fitted so that no condensation can enter the pressure regulator but rather flows back into the combustion chamber

7 2 Setting the low-fire rate on VAG VAH VRH VAV

-10 +05-05

ndash

+1

-15

mbar

+15

06

1 152

3

N V

+ +ndash

+30 -15+15

ndash

-3

+5

mbar

-5

N

+

VAG VAH VRH VAV

If the burner operates at low-fire rate the gasair mixture can be changed using the parallel shift of the characteristic curve by turning the adjusting screw ldquoNrdquoAdjusting range at low fire VAG VAH VRH -5 to +5 mbar (-195 to +195 WC) VAV -15 to +15 mbar (-06 to +06 WC)

7 3 Setting the high-fire rate on VAVTo set the high-fire rate the transmission ratio is changed us-ing the adjusting screw ldquoVrdquo until the required flue gas values are achievedTransmission ratio V = pdpsa = 061 to 31The settings N and V can influence each other and must be repeated if necessary

+N+V

-V

-N

VAV

psa [mbar]

p d [m

bar]

7 3 1 CalculationWith no connection to the combustion chamber control pres-sure psc pd = V times psa + NWith connection to the combustion chamber control pressure psc (pd - psc) = V times (psa - psc) + N

Project planning information

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 37

pu pd

21579

4836

085310

189

142

8 Accessories8 1 Gas pressure switch DG VC for VAx VRHType Adjusting range [mbar]DG 17VC 2 to 17DG 40VC 5 to 40DG 110VC 30 to 110DG 300VC 100 to 300

Scope of delivery 1 times pressure switch for gas 2 times retaining screws 2 times sealing rings

8 2 Gas pressure switch DG VCT for VAx T VRH TType Adjusting range [WC]DG 17VCT 08 to 68DG 40VCT 2 to 16DG 110VCT 12 to 44DG 300VCT 40 to 120

Scope of delivery 1 times gas pressure switch with AWG 18 connection wires 2 times retaining screws 2 times sealing ringsMonitoring the inlet pressure pu the electrical plug of the pressure switch for gas points towards the inlet flangeMonitoring the outlet pressure pd the electrical plug of the pressure switch for gas points towards the outlet flange

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 38

A BC

D

FE

ACD

F

B

E

8 3 Bypass valvepilot gas valve VAS 18 3 1 VAS 1 attached to VADVAGVAHVAV 1Scope of delivery A 1 times bypasspilot gas valve VAS 1 B 4 times O-rings C 4 times double nuts D 4 times connection parts E 1 times mounting aidBypass valve VAS 1 F 2 times connection pipes if the bypass valve has a blind flange

at the outlet sidePilot gas valve VAS 1 F 1 times connection pipe 1 times sealing plug if the pilot gas valve

has a threaded flange at the outlet side

Accessories

8 3 2 VAS 1 attached to VADVAGVAHVAV 2 VADVAGVAHVAV 3Scope of delivery A 1 times bypasspilot gas valve VAS 1 B 4 times O-rings C 4 times spacer sleeves D 4 times connection parts E 1 times mounting aidBypass valve VAS 1 F 2 times connection pipes if the bypass valve has a blind flange

at the outlet sidePilot gas valve VAS 1 F 1 times connection pipe 1 times sealing plug if the pilot gas valve

has a threaded flange at the outlet side

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 39

2

3

456

810

20

30

405060

80100

∆p [m

bar]

005 01 02 03 05 08 1 2 3 4 51

3

2

Qn [m3h]

1

01

02

03

0405

08

003

002

6 8 10

005 01 02 03 05 08 1 2 3 4 5003 6 8 10

20

005 01 02 03 05 08 1 2 3 4 5003 6 8 10 20

30

∆p [i

nch

WC]

1

2

3

456

810

20

30

40

04

004

006

00801

02

03

0506

08

Qn [SCFH]10 40 60 100 200 3001 500 10002 3 4 5

120 306 8

21 3 4 5 6 7 8 910

8 3 3 Flow rate

The characteristic flow rate curves have been measured for bypass valve VAS 1 with connection pipe diameter 1 to 10 mm (004 to 04) and for the pilot gas valve with 10 mm (04) connection pipe

Bypass valve connection pipe diameter [mm]

Pilo

t gas

val

ve 1

0 m

m (0

4)

conn

ectio

n pi

pe d

iam

eter

Accessories gt Bypass valvepilot gas valve VAS 1

= natural gas (ρ = 080 kgm3) = propane (ρ = 201 kgm3) = air (ρ = 129 kgm3)

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 40

Accessories

8 4 Bypass valvepilot gas valve VBY 8 for VADVAGVAHVAV 1

B

C

AVBY 8

VAx 1

55

(217)40(157)

70 (276)

80(315)

Rp frac14(pilot gas valve)

For mounting on VAD VAG VAH VAV 1 and double solenoid valve VCD VCG VCH VCV 1

8 4 1 Scope of delivery VBY 8I as bypass valveA 1 times bypass valve VBY 8IB 2 times retaining screws with 4 times O-rings both retaining screws

have a bypass orificeC 1 times grease for o-rings

8 4 2 Scope of delivery VBY 8R as pilot gas valveA 1 times pilot gas valve VBY 8RB 2 times retaining screws with 5 x O-rings one retaining screw

has a bypass orifice (2 x O-rings) the other does not (3 x O-rings)

C 1 times grease for O-rings

8 4 3 SelectionType I R W Q K 6L -R -L E B D 05

VBY 8

Order exampleVBY 8RW6L-LED

8 4 4 Type codeCode DescriptionVBY Gas solenoid valve8 Nominal sizeIR

For internal gas pick-up as bypass valveFor external gas pick-up as pilot gas valve

KQW

Mains voltage 24 V DC Mains voltage 120 V AC 5060 HzMains voltage 230 V AC 5060 Hz

6L Electrical connection via plug and socket with LED-R-L

Attachment side of main valve right-hand sideAttachment side of main valve left-hand side

EB

Attached to the VAxEnclosed (separate packing unit)

05D

Nozzle diameter = 05 mm (002)Flow adjustment

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 41

2

01

02

03

05

081

3

456

810

20

30

405060

80100

∆p [m

bar]

1

3

201 02 03 05 1 2 3001 003 4

Qn [m3h]

02 03 05 1 2

01 02 05

002 006

002

002 006 1

0010006 005 01

001

0003

0006 2 3

VBY 8DVBY 805

∆p [i

nch

WC]

1

2

3

456

810

20

30

40

040506

08

1

Qn [SCFH]10 40 60 1005 2081 2 30402

01

02

03

004005006

008

Adjusting range

8 4 5 Flow rateVBY 8 D

+

-

The flow rate can be set by turning the flow rate restrictor (4 mm016 Allen screw) frac14 of a turn Flow rate 10 to 100

VBY 8 05The flow is routed through a 05 mm (002) nozzle and thus has a fixed characteristic flow rate curve Adjustment is not possible

8 4 6 Technical dataInlet pressure pu max 500 mbar (7 psig)Ambient temperature 0 to +60degC (32 to 140degF) no condensation permittedStorage temperature 0 to +40degC (32 to 104degF) no condensation permittedPower consumption 24 V = 8 W 120 V = 8 W 230 V = 95 WEnclosure IP 54

Accessories gt Bypass valvepilot gas valve VBY 8 for VADVAGVAHVAV 1

= natural gas (ρ = 080 kgm3) = propane (ρ = 201 kgm3) = air (ρ = 129 kgm3)

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 42

TC 116VB C

56(22)

49(193)

27(106)

A

A

VCx 1 VCx 2VCx 3

8 5 Tightness control TC 116Vfor VAx 1 ndash 3An adapter plate is required to attach the tightness control to the right- or left-hand side of the pressure regulator with gas solenoid valveScope of delivery A 1 times adapter plate B 2 times O-rings C 2 times retaining screwsFor attachment to left-hand side Order No 74922391 right-hand side Order No 74921995

8 6 Pressure test pointsTest points to check the inlet pressure pu and outlet pressure pdScope of delivery 1 x pressure test points with 1 x profiled sealing rings Order No 74923390

8 7 Cable gland setWhen wiring a double solenoid valve with pressure regula-tor VCx the connection boxes are to be connected using a cable gland setThe cable gland set can only be used if the connection boxes are at the same height and on the same side and if both valves are equipped either with or without a proof of closure switchVA 1 Order No 74921985 VA 2 Order No 74921986 VA 3 Order No 74921987

Accessories

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 43

A B

D

C

Accessories

8 9 Differential pressure orifice

Size PipeDN

Differential pressure orifi cewith outlet dia

1 15 17 mm 0671 20 25 mm 0981 25 30 mm 1182 40 46 mm 1813 50 58 mm 228

If pressure regulator VADVAGVAV 1 is retrofitted upstream of gas solenoid valve VAS 1 a DN 25 differential pressure orifice with outlet opening d = 30 mm (118) must be inserted at the outlet of the pressure regulatorIn the case of pressure regulator VAx 115 or VAx 120 the DN 25 differential pressure orifice must be ordered separately and retrofitted Order No 74922240

8 8 Seal set VA 1 ndash 3VA 1 Order No 74921988 VA 2 Order No 74921989 VA 3 Order No 74921990Scope of deliveryA 1 times double block seal B 2 times O-rings (flange) C 2 times O-rings (pressure switch) for pressure test pointscrew plug D 2 times sealing rings (flat sealing) and 2 times profiled sealing rings

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 44

BA

C

pd-

8 11 Attachment blockFor locked installation of pressure gauge and other acces-soriesScope of delivery A 1 times attachment block B 2 times self-tapping screws for installation C 2 times O-rings

Accessories

8 10 Retaining frameIn the event that a pressure regulator VAx is installed at a later point upstream of a gas solenoid valve VAS a measur-ing orifice VMO or a fine-adjusting valve VMV the retaining frame must be fitted at the inlet of the second device in order to fasten the differential pressure orifice at the regulator outlet Order the retaining frame separatelyRetaining frame for Size 1 Order No 74923029 Size 2 Order No 74923030 Size 3 Order No 74923031

8 12 Gas control lineFine-adjusting valve VMV can be installed on the flow rate regulator VAH for fine adjustment of the gas flow rateThe gas control line for gas outlet pressure pd- is available with 2 18 compression fittingsSize 1 Order No 74924458 Size 2 Order No 74924459

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 45

8 13 Measuring orifice VMOThe measuring orifice VMO is designed to reduce the gas and air flow rates and is installed downstream of the valVario control The measuring orifice is available with Rp internal thread (NPT internal thread) or flange to ISO 7005See wwwdocuthekcom Elster Kromschroumlder Krom-schroumlder LBE Products 03 Valves and butterfly valves valVario accessories Type of document Technical Informa-tion VMO

Accessories

8 14 Filter module VMFUsing the filter module VMF the gas flow upstream of the gas solenoid valve VAS and the airgas ratio control is cleaned The filter module is available with Rp internal thread (NPT internal thread) or flange to ISO 7005 and can also be supplied with fitted pressure switch as an optionSee wwwdocuthekcom Elster Kromschroumlder Krom-schroumlder LBE Products 03 Valves and butterfly valves valVario accessories Type of document Technical Informa-tion VMF

8 15 Fine-adjusting valve VMVThe flow rate is set using the fine-adjusting valve VMV The fine-adjusting valve is available with Rp internal thread (NPT internal thread) or flange to ISO 7005See wwwdocuthekcom Elster Kromschroumlder Krom-schroumlder LBE Products 03 Valves and butterfly valves valVario accessories Type of document Technical Infor-mation VMV

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 46

9 Technical dataGas types natural gas LPG (gaseous) biologically produced methane (max 01 -by-vol H2S) or clean air other gases on request The gas must be clean and dry in all temperature conditions and must not contain condensateCE and FM approved UL listed max inlet pressure pu 10 ndash 500 mbar (4 ndash 200 WC) FM approved (230 V AC 120 V AC 24 V DC) non opera-tional pressure 700 mbar (10 psig)ANSICSA approved (230 V AC 120 V AC 24 V DC) up to 350 mbar (5 psig)Opening time of the solenoid valve quick opening le 05 s Closing time quick closing lt 1 sMedium and ambient temperatures -20 to +60degC (-4 to +140degF) no condensation permittedStorage temperature -20 to +40degC (-4 to +104degF)Enclosure IP 65Valve housing aluminium valve seal NBRConnection flanges with internal thread Rp to ISO 7-1 NPT to ANSIASMESafety valve Class A to EN 161 Factory Mutual Research Class 7400 Process Control Valves (230 V AC 120 V AC 24 V DC) ANSI Z2121 and CSA 65 ANSI Z2118 and CSA 63Control class A to EN 88-1Control range up to 101

Mains voltage 230 V AC +10-15 5060 Hz 200 V AC +10-15 5060 Hz 120 V AC +10-15 5060 Hz 100 V AC +10-15 5060 Hz 24 V DC plusmn20Duty cycle 100Power factor of the solenoid coil cos φ = 09Power consumption

Type Voltage Power

VAx 1

24 V DC 25 W ndash100 V AC 25 W (26 VA)120 V AC 25 W (26 VA)200 V AC 25 W (26 VA)230 V AC 25 W (26 VA)

VAx 2 VAx 3

24 V DC 36 W ndash100 V AC 36 W (40 VA)120 V AC 40 W (44 VA)200 V AC 40 W (44 VA)230 V AC 40 W (44 VA)

VBY24 V DC 8 W ndash

120 V AC 8 W ndash230 V AC 95 W ndash

Cable gland M20 times 15Electrical connection cable with max 25 mm2 (AWG 12) or plug with socket to EN 175301-803

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 47

Position indicator contact rating

Type Voltage Min current(resistive load)

Max current(resistive load)

VAxS VCxS 12 ndash 250 V AC 5060 Hz 100 mA 3 AVAxG VCxG 12 ndash 30 V DC 2 mA 01 A

Position indicator switching frequency max 5 times per minute

Switching current [A]

Switching cyclescos φ = 1 cos φ = 06

01 500000 50000005 300000 250000

1 200000 1000003 100000 ndash

Limited to max 200000 cycles for heating systems

9 1 VADOutlet pressure pd VAD-25 25 ndash 25 mbar (1 ndash 10 WC) VAD-50 20 ndash 50 mbar (8 ndash 20 WC) VAD-100 35 ndash 100 mbar (14 ndash 40 WC)Combustion chamber control pressure psc (connection psa)

-20 to +20 mbar (-78 to +78 WC)

VAD

pu

pd

(psa)

9 2 VAGOutlet pressure pd 05 ndash 100 mbar (02 ndash 40 WC)Air control pressure psa 05 ndash 100 mbar (02 ndash 40 WC)

Adjusting range at low fire plusmn5 mbar (plusmn2 WC)Transmission ratio of gas to air 11The inlet pressure must always be higher than the air control pressure psa + pressure loss ∆p + 5 mbar (2 WC)

VAGpd

pu

psa

psa

VAGK 1 x 18 coupling for plastic hose (internal dia 39 mm (015) external dia 61 mm (024)) or VAGE 1 x 18 compression fitting for 6 times 1 tube or VAGA 1 x NPT 18 adapter or VAGN zero governor with breathing orifice

9 3 VAH VRHAir control pressure psa 06 ndash 100 mbar (024 ndash 40 WC) Differential air pressure ∆psa (psa - psa-) 06 ndash 50 mbar (024 ndash 197 WC) Differential gas pressure ∆pd (pd - pd-) 06 ndash 50 mbar (024 ndash 197 WC)Transmission ratio of gas to air 11The inlet pressure must always be higher than the differen-tial air pressure ∆psa + pressure loss ∆p + max gas pres-sure on burner + 5 mbar (2 WC)Adjusting range at low fire plusmn5 mbar (plusmn2 WC)

Technical data

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 48

VAHVRH

pd-

pu

psa-

psa

Connection of the air control pressure psaVAHE VRHE 3 x 18 compression fitting for 6 times 1 tube or VAHA VRHA 3 x NPT 18 adapter

9 4 VAVOutlet pressure pd 05 ndash 30 mbar (02 ndash 117 WC)Air control pressure psa 04 ndash 30 mbar (015 ndash 117 WC)Combustion chamber control pressure psc

-20 to +20 mbar (-78 to +78 WC)Min control pressure differential psa - psc 04 mbar (015 WC)Min pressure differential pd - psc 05 mbar (02 WC)Adjusting range at low fire plusmn15 mbar (plusmn06 WC)Transmission ratio of gas to air 061 to 31The inlet pressure pu must always be higher than the air control pressure psa times transmission ratio V + pressure loss ∆p + 15 mbar (06 WC)

pu

pd psapsc

VAV

VAVK 2 x plastic hose couplings (internal dia 39 mm (015) external dia 61 mm (024)) or VAVE 2 x 18 compression fitting for 6 times 1 tube or VAVA 2 x NPT 18 adapter

Technical data

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 49

9 5 Safety-specific characteristic values for VAx 1 ndash 3For SILSuitable for Safety Integrity Level SIL 1 2 3

Diagnostic coverage DC 0

Type of subsystem Type A to EN 61508-2 74312

Operating mode High demand mode pursu-ant to EN 61508-4 3512

For PLSuitable for Performance Level PL a b c d e

Category B 1 2 3 4Common cause failure CCF gt 65Application of essential safety requirements Satisfied

Application of tried-and-tested safety requirements Satisfied

For SIL and PL

B10d value

Operating cyclesVAD VAG VAV VAH 1 10094360VAD VAG VAV VAH 2 8229021VAD VAG VAV VAH 3 6363683

Hardware fault tolerance (1 valve) HFT 0

Hardware fault tolerance (2 valves) HFT 1

Safe failure fraction SFF gt 90Fraction of undetected com-mon cause failures β ge 2

Max service life under operating conditions10 years after date of production plus max 12 year in stor-age prior to first use or once the given number of operating cycles has been reached depending on which is achieved firstThe devices are suitable for single-channel systems (HFT = 0) up to SIL 2PL d and up to SIL 3PL e when two re-dundant valves are installed in a double-channel architecture (HFT = 1) provided that the complete system complies with the requirements of EN 61508ISO 13849

For a glossary of terms see page 53 (Glossary)

Technical data

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 50

nop 1hnop 1a

sB10d

T10d aPFHD (1 VAx) 1h

PFHD (2 VAx) 1h

PFDavg (1 VAx)

PFDavg (2 VAx)

Technical data gt Safety-specific characteristic values for VAx 1 ndash 3

9 5 1 Determining the PFHD value the λD value and the MTTFd value

PFHD = λD = x nop= 1MTTFd

01B10d

PFDavg = x λD x 24 x 365 x T10d 12

Type

Cycle time

suitable for

suitable for

PFHD = Probability of dangerous failure (HDM = high de-mand mode) [1hour]PFDavg = Average probability of dangerous failure on de-mand (LDM = low demand mode)λD = Mean dangerous failure rate [1hour]MTTFd = Mean time to dangerous failure [hours]nop = Demand rate (mean number of annual operations) [1hour]

9 5 2 Calculating the PFHD and PFDavg

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 51

VAD VAG VAH VAV

H1

Rp frac14(NPT frac14)

H2

E

LF

F

H4

H3

B

VAxS VAxF

L2G

G

Technical data

9 6 Dimensions

Type

Connec-tion Dimensions

WeightRpNPT DN

L L2 E F G H1 H2 H3 H4 Bmm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch kg lbs

VAx 115 12 15 75 29 ndash ndash 75 29 15 06 ndash ndash 143 56 82 32 161 63 117 46 97 38 18 40VAH 115 12 15 75 29 ndash ndash 75 29 15 06 ndash ndash 143 56 100 39 161 63 135 53 97 38 2 44VAx 120 34 20 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 82 33 161 63 117 46 97 38 19 42VAH 120 34 20 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 100 39 161 63 135 53 97 38 21 46VAx 125 1 25 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 82 33 161 63 117 46 97 38 19 42VAH 125 1 25 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 100 39 161 63 135 53 97 38 21 46VAx 240 112 40 128 50 200 79 85 33 29 11 66 26 170 67 112 44 191 75 162 64 125 49 44 97VAH 240 112 40 128 50 200 79 85 33 29 11 66 26 170 67 132 52 191 75 182 72 125 49 47 104VAx 350 2 50 155 61 230 91 85 33 36 14 74 29 180 70 135 53 201 79 196 77 160 63 61 134VAH 350 2 50 155 61 230 91 85 33 36 14 74 29 180 70 156 61 201 79 217 85 160 63 64 141

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 52

10 Converting unitssee wwwadlatusorg

11 Maintenance cyclesAt least once per annum at least twice per annum for biologi-cally produced methaneIf the flow rate drops clean the strainer

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 53

12 Glossary12 1 Diagnostic coverage DCMeasure of the effectiveness of diagnostics which may be determined as the ratio between the failure rate of detected dangerous failures and the failure rate of total dangerous failuresNOTE Diagnostic coverage can exist for the whole or parts of a safety-related system For example diagnostic cover-age could exist for sensors andor logic system andor final elements Unit see EN ISO 13849-12008

12 2 Mode of operationHigh demand mode or continuous modeOperating mode where the frequency of demands for opera-tion made on a safety-related system is greater than one per year or greater than twice the proof-test frequencysee EN 61508-42008

12 3 CategoryClassification of the safety-related parts of a control system in respect of their resistance to faults and their subsequent behaviour in the fault condition and which is achieved by the structural arrangement of the parts fault detection andor by their reliability see EN ISO 13849-12008

12 4 Common cause failure CCFFailures of different items resulting from a single event where these failures are not consequences of each othersee EN ISO 13849-12008

12 5 Fraction of undetected common cause failures β Fraction of undetected failures of redundant components due to a single event whereby these failures are not based on mutual causesNOTE β is expressed as a fraction in the equations and as a percentage elsewheresee EN 61508-62010

12 6 B10d valueMean number of cycles until 10 of the components fail dan-gerouslysee EN ISO 13849-12008

12 7 T10d valueMean time until 10 of the components fail dangerouslysee EN ISO 13849-12008

12 8 Hardware fault tolerance HFTA hardware fault tolerance of N means that N + 1 is the mini-mum number of faults that could cause a loss of the safety functionsee IEC 61508-22010

12 9 Mean dangerous failure rate λD Mean rate of dangerous failures during operation time (T10d) Unit 1hsee EN ISO 13849-12008

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 54

12 10 Safe failure fraction SFFFraction of safe failures related to all failures which are as-sumed to appearsee EN 13611A22011

12 11 Probability of dangerous failure PFHD Value describing the likelihood of dangerous failure per hour of a component for high demand mode or continuous mode Unit 1hsee EN 13611A22011

12 12 Mean time to dangerous failure MTTFd Expectation of the mean time to dangerous failuresee EN ISO 13849-12008

12 13 Demand rate nop Mean number of annual operationssee EN ISO 13849-12008

12 14 Average probability of dangerous failure on demand PFDavg (LDM = 1 ndash 10 switching cyclesyear)Average probability of a dangerous failure of the safety function on demand (LDM = low demand mode)see EN 61508-6

Glossary

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415

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NavigationI can find my way aroundI got ldquolostrdquoNo answer

UseTo get to know the productTo choose a productPlanningTo look for information

My scope of functionsTechnical departmentSalesNo answer

Remarks

(Adobe Reader 7 or higher required) wwwadobecom

Elster GmbH Postfach 2809 middot 49018 Osnabruumlck Strotheweg 1 middot 49504 Lotte (Buumlren) GermanyT +49 541 1214-0 F +49 541 1214-370 infokromschroedercomwwwkromschroedercom

The current addresses of our international agents are available on the Internetwwwkromschroederdeindexphpid=718ampL=1

We reserve the right to make technical modifications in the interests of progressCopyright copy 2015 Elster GmbH All rights reserved

Contact

Feedback

0325

0530

  • Pressure regulators with solenoid valve VAD VAG VAV VAH
  • Flow rate regulator VRH
  • Pressure regulators with double solenoid valve VCD VCG VCV VCH
  • Contents
  • 1 Application
    • 11 Examples of application
      • 111 Constant pressure control
      • 112 Constant pressure control with two gas solenoid valves
      • 113 Constant pressure control with max pressure switch
      • 114 Constant pressure control with non-controlled pilot gas outlet
      • 115 Modulating control
      • 116 Modulating control with two gas solenoid valves
      • 117 Modulating control with two gas solenoid valves and inlet pressure switch
      • 118 HighLow control
      • 119 Zero pressure control
      • 1110 Staged flow rate control
      • 1111 Continuous or staged flow rate control
      • 1112 Modulating control with variable airgas ratio control with gas solenoid valve
      • 1113 Modulating control in residential heat generation
          • 2 Certification
          • 3 Function
            • 31 VAD VAG VAH VRH VAV
              • 311 Pressure regulator for gas VAD
              • 312 Airgas ratio control VAG
              • 313 Flow rate regulators VAH VRH
              • 314 Variable airgas ratio control VAV
              • 315 Pressure regulator with gas solenoid valve VAxS position indicator with visual indicator
                • 32 Animation
                • 33 Connection diagram
                  • 331 VAx with M20 cable gland
                  • 332 VAx with plug
                  • 333 VAS with VADVAGVAHVAV with M20 cable gland
                  • 334 VAS with VADVAGVAHVAV with plug
                      • 4 Replacement possibilities for MODULINE pressure regulators with gas solenoid valve
                        • 41 GVS GVI GVIB GVR and GVRH are to be replaced by VAD VAG VAG+VAS VAH and VAV
                          • 5 Flow rate
                            • 51 Selection example for VAD
                              • 511 Calculate VAD
                                • 52 Selection example for VAG VAH VRH VAV
                                  • 521 CalculateVAG VxHVAV
                                    • 53 Selection example for zero governor VAGN
                                      • 531 Calculate VAGN
                                          • 6 Selection
                                            • 61 Selection table for pressure regulator with solenoid valve VAD
                                            • 62 Type code for VAD
                                            • 63 Selection table for airgas ratio control with solenoid valve VAG flow rate regulators VAH VRH
                                            • 64 Type code for VAG VAH VRH
                                            • 65 Selection table for variable airgas ratio control with solenoid valve VAV
                                            • 66 Type code for VAV
                                            • 67 Accessories
                                              • 7 Project planning information
                                                • 71 Installation
                                                  • 711 Installation position
                                                    • 72 Setting the low-fire rate on VAG VAH VRH VAV
                                                    • 73 Setting the high-fire rate on VAV
                                                      • 731 Calculation
                                                          • 8 Accessories
                                                            • 81 Gas pressure switch DGVC for VAx VRH
                                                            • 82 Gas pressure switch DGVCT for VAxT VRHT
                                                            • 83 Bypass valvepilot gas valve VAS 1
                                                              • 831 VAS 1 attached to VADVAGVAHVAV 1
                                                              • 832 VAS 1 attached to VADVAGVAHVAV 2 VADVAGVAHVAV 3
                                                              • 833 Flow rate
                                                                • 84 Bypass valvepilot gas valve VBY 8 for VADVAGVAHVAV 1
                                                                  • 841 Scope of delivery VBY 8I as bypass valve
                                                                  • 842 Scope of delivery VBY 8R as pilot gas valve
                                                                  • 843 Selection
                                                                  • 844 Type code
                                                                  • 845 Flow rate
                                                                  • 846 Technical data
                                                                    • 85 Tightness control TC 116V
                                                                    • 86 Pressure test points
                                                                    • 87 Cable gland set
                                                                    • 88 Seal set VA 1thinspndashthinsp3
                                                                    • 89 Differential pressure orifice
                                                                    • 810 Retaining frame
                                                                    • 811 Attachment block
                                                                    • 812 Gas control line
                                                                    • 813 Measuring orifice VMO
                                                                    • 814 Filter module VMF
                                                                    • 815 Fine-adjusting valve VMV
                                                                      • 9 Technical data
                                                                        • 91 VAD
                                                                        • 92 VAG
                                                                        • 93 VAH VRH
                                                                        • 94 VAV
                                                                        • 95 Safety-specific characteristic values for VAx 1thinspndashthinsp3
                                                                          • 951 Determining the PFHD value the λD value and the MTTFd value
                                                                          • 952 Calculating the PFHD and PFDavg
                                                                            • 96 Dimensions
                                                                              • 10 Converting units
                                                                              • 11 Maintenance cycles
                                                                              • 12 Glossary
                                                                                • 121 Diagnostic coverage DC
                                                                                • 122 Mode of operation
                                                                                • 123 Category
                                                                                • 124 Common cause failure CCF
                                                                                • 125 Fraction of undetected common cause failures β
                                                                                • 126 B10d value
                                                                                • 127 T10d value
                                                                                • 128 Hardware fault tolerance HFT
                                                                                • 129 Mean dangerous failure rate λD
                                                                                • 1210 Safe failure fraction SFF
                                                                                • 1211 Probability of dangerous failure PFHD
                                                                                • 1212 Mean time to dangerous failure MTTFd
                                                                                • 1213 Demand rate nop
                                                                                • 1214 Average probability of dangerous failure on demand PFDavg
                                                                                  • Feedback
                                                                                  • Contact
                                                                                      1. naechste_Seite 24
                                                                                      2. naechste Seite 18
                                                                                      3. naechste Seite 6
                                                                                      4. naechste Seite 16
                                                                                      5. naechste Seite 14
                                                                                      6. naechste Seite 25
                                                                                      7. naechste_Seite 11
                                                                                      8. naechste_Seite 17
                                                                                      9. fbArbeitspunkt_Min Ja
                                                                                      10. fbArbeitspunkt Ja
                                                                                      11. ftProgramm Standard-Programm
                                                                                      12. fz_kv
                                                                                      13. fz_pe 80
                                                                                      14. fz_pG 60
                                                                                      15. fzDelta_p_Soll 20
                                                                                      16. ftEinheit_Druck mbar
                                                                                      17. fatTyp [115]
                                                                                      18. fbArbeitspunkt_Min_2 Ja
                                                                                      19. fbArbeitspunkt_2 Ja
                                                                                      20. ftRegler_Typ VAG
                                                                                      21. ftProgramm_2 Standard-Programm
                                                                                      22. fz_kv_2
                                                                                      23. fatMedium [08]
                                                                                      24. fzDichte 08
                                                                                      25. ftEinheit_Dichte kgm3
                                                                                      26. fzV_Norm 30
                                                                                      27. ftEinheit_Volstrom m3h
                                                                                      28. fz_pe_2 80
                                                                                      29. fz_pG_2 60
                                                                                      30. fzDelta_p_Soll_2 20
                                                                                      31. ftEinheit_Druck2 [mbar]
                                                                                      32. ftEinheit_Geschw [ms]
                                                                                      33. fatTyp_2 [10954451150103322]
                                                                                      34. fbArbeitspunkt_Min_3 Ja
                                                                                      35. fbArbeitspunkt_3 Ja
                                                                                      36. ftProgramm_3 Standard-Programm
                                                                                      37. fz_kv_3
                                                                                      38. fz_pe_3 20
                                                                                      39. fz_pG_3 0
                                                                                      40. fzDelta_p_Soll_3 20
                                                                                      41. fatTyp_3 [123]
                                                                                      42. fatSchaltleistung [6363683]
                                                                                      43. fz_nop_Stunde 1
                                                                                      44. fz_nop_Jahr 8760
                                                                                      45. fzZyklus 3600
                                                                                      46. fzB10d 6363683
                                                                                      47. fzT10d 10
                                                                                      48. fzPFHd_1V 15714170551864384e-8
                                                                                      49. fzPFDavg_1V
                                                                                      50. ftGeeignet_1V PL d SIL 2
                                                                                      51. fzPFHd_2V 33505832253532625e-10
                                                                                      52. fzPFDavg_2V
                                                                                      53. ftGeeignet_2V PL e SIL 3
                                                                                      54. ftUebersicht Off
                                                                                      55. ftVerstaendlichkeit Off
                                                                                      56. ftFehlende_Info
                                                                                      57. ftUmfang Off
                                                                                      58. ftVerwendung_1 Off
                                                                                      59. ftVerwendung_2 Off
                                                                                      60. ftVerwendung_3 Off
                                                                                      61. ftVerwendung_4 Off
                                                                                      62. ftNavigation Off
                                                                                      63. ftTaetigkeitsbereich Off
                                                                                      64. ftBemerkung
                                                                                      65. Michael Rehkamp Elster Kromschroumlder>btnSenden
Page 31: VAD, VAG, VAV, VAH, VRH, VCD, VCG, VCV, VCH · PDF fileVAD, VAG, VAH, VAV, VRH, VCD, VCG, VCV, VCH · Edition 04.15 6 VAD VAD VAS 1 .1 Examples of application 1 .1 .1 Constant pressure

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 31

6 5 Selection table for variable airgas ratio control with solenoid valve VAVAccessories right Accessories left

Type1) T R N F N K P Q Y W S2) G2) R2) L2) M20

cab

le g

land

Plug

with

soc

ket

Plug

with

out s

ocke

t

A B E K A Scre

w p

lug

Pres

sure

test

poi

ntD

G 1

7VC

3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

Scre

w p

lug

Pres

sure

test

poi

ntD

G 1

7VC

3)

DG

40V

C 3)

DG

110

VC 3)

DG

300

VC 3)

Bypa

ss v

alve

VBY

Bypa

ss v

alve

VA

S 1

VAV 115

VAV 120

VAV 125

VAV 240

VAV 350

= standard = available1) The following nominal inlet fl ange diameters are also available size 1 with nominal diameter DN 10 size 2 with nominal diameters DN 25 DN 32 and DN 50 size 3 with nominal diameters DN 40 and DN 652) Position indicator and bypasspilot gas valve cannot be fi tted together on the same side3) Specify the test point for inlet pressure pu or outlet pressure pdHelp for selecting the variable airgas ratio control VAV can be found on the ProFi DVD wwwkromschroedercom

Products DVD Product fi nder ldquoProFirdquo

Order exampleVAV 240RNWAK

Selection

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 32

Selection

6 6 Type code for VAVCode DescriptionVAV Variable airgas ratio control with solenoid valve1 ndash 3 SizeT T-product15 ndash 50 Nominal inlet and outlet diameterRNF

Rp internal threadNPT internal thread

ISO fl angeN Quick opening quick closingKPQYW

Mains voltage 24 V DCMains voltage 100 V AC 5060 HzMains voltage 120 V AC 5060 HzMains voltage 200 V AC 5060 HzMains voltage 230 V AC 5060 Hz

SG

Position indicator with visual indicatorPosition indicator for 24 V with visual indicator

RL

Viewed from the right (in the direction of fl ow)Viewed from the left (in the direction of fl ow)

AB

Standard valve seatReduced valve seat

EKA

Connection kit for air control pressure psa and combus-tion chamber control pressure psc

compression fi ttingplastic hose coupling

NPT 18 adapter

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 33

Selection

6 7 AccessoriesModularly configurable withndash Screw plugsndash Pressure test pointsndash Pressure switch DGVC for inlet

andor outlet pressurendash Tightness control TCndash Bypasspilot gas valve VBY 8 for

size 1ndash Bypasspilot gas valve VAS 1For further information see page 37 (Accessories)

Position indicator

Plug with socket

Plug

Screwplugs

Pressuretest points

Pressure switch DGC Tightness

control TC

Bypasspilot gas valve VBY 8 for size 1

Bypasspilot gas valve VAS 1

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 34

7 Project planning informationDo not store or install the unit in the open airThe inlet pressure pu and the outlet pressure pd can be meas-ured on both sides of the valve body To increase the control accuracy an external impulse line can be connected instead of the pressure test point pd

VAD

pu

pd

(psa)

VAGpd

pu

psa

psa

VAD measurement point for the gas outlet pressure pd on the regulator body A combustion chamber control line (psc) can be connected to connection psa for maintaining a constant burner capacityVAG additional measurement point for the air control pressure psa on the regulator body

VAV

psapsc

pu

pd

VAH VRH

pu

pd-

pdpsa-

psa

VAV measurement point for the outlet pressure pd on the regulator bodyVAH additional measurement points for the outlet pressure pd- and the air control pressure psapsa- on the regulator body

7 1 Installation

GFK

VAGVAH

GFKVAD

Sealing material and thread cuttings must not be allowed to get into the valve housing Install a filter upstream of every system

gt20 mmgt0 79

The unit must not be in contact with masonry Minimum clear-ance 20 mm (079 inches)Ensure that there is sufficient space for installation and ad-justment

le +100 degCle +212 degF

The solenoid body heats up during operation ndash depending on ambient temperature (max 60degC140degF) and intrinsic heating (approx 40degC104degF)

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 35

In the case of double solenoid valves the position of the con-nection box can only be changed by removing the actuator and reinstalling it offset by 90deg or 180deg

If more than three valVario controls are installed in line the controls must be supported

The seals in some gas compression fittings are approved for temperatures of up to 70degC (158degF) This temperature limit will not be exceeded if the flow through the pipe is at least 1 msup3h (3531 SCFH) of gas and the maximum ambient temperature is 50degC (122degF)

7 1 1 Installation position

pu ge 80 mbar(80 hPa32 WC)

VAD VAG VAH VRH VAV

In humid environments black solenoid actuator in the vertical upright position only

VAD VAG VAH VRH black solenoid actuator in the vertical upright position or tilted up to the horizontal not upside downVAG VAH horizontal position only if pu ge 80 mbar (32 WC))VAV installation in the vertical position only black solenoid actuator in the vertical upright positionTo ensure that the airgas ratio control VAG the flow rate regulator VAH VRH or the variable airgas ratio control VAV can react quickly when the load is changed the impulse line for the air control pressure psa and for VAV the impulse line for the combustion chamber control pressure psc should be kept as short as possible The tube internal diameter for the impulse line must always be ge 39 mm (015)

VAH VRHIt is not permitted to install a gas solenoid valve VAS down-stream of flow rate regulator VAH VRH and upstream of fine-adjusting valve VMV The VAS would no longer be able to perform its function as a second safety valve if installed in the above-mentioned position

M

VMV

VAH

VASVAS

pd-

psa-psa

VMV

VAH pd-

psa-psa

The measuring orifice in the air line for impulse lines psa and psa- must always be installed downstream of the air control valve

Project planning information gt Installation

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 36

VAVThe impulse line for the combustion chamber control pres-sure psc must be fitted so that no condensation can enter the pressure regulator but rather flows back into the combustion chamber

7 2 Setting the low-fire rate on VAG VAH VRH VAV

-10 +05-05

ndash

+1

-15

mbar

+15

06

1 152

3

N V

+ +ndash

+30 -15+15

ndash

-3

+5

mbar

-5

N

+

VAG VAH VRH VAV

If the burner operates at low-fire rate the gasair mixture can be changed using the parallel shift of the characteristic curve by turning the adjusting screw ldquoNrdquoAdjusting range at low fire VAG VAH VRH -5 to +5 mbar (-195 to +195 WC) VAV -15 to +15 mbar (-06 to +06 WC)

7 3 Setting the high-fire rate on VAVTo set the high-fire rate the transmission ratio is changed us-ing the adjusting screw ldquoVrdquo until the required flue gas values are achievedTransmission ratio V = pdpsa = 061 to 31The settings N and V can influence each other and must be repeated if necessary

+N+V

-V

-N

VAV

psa [mbar]

p d [m

bar]

7 3 1 CalculationWith no connection to the combustion chamber control pres-sure psc pd = V times psa + NWith connection to the combustion chamber control pressure psc (pd - psc) = V times (psa - psc) + N

Project planning information

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 37

pu pd

21579

4836

085310

189

142

8 Accessories8 1 Gas pressure switch DG VC for VAx VRHType Adjusting range [mbar]DG 17VC 2 to 17DG 40VC 5 to 40DG 110VC 30 to 110DG 300VC 100 to 300

Scope of delivery 1 times pressure switch for gas 2 times retaining screws 2 times sealing rings

8 2 Gas pressure switch DG VCT for VAx T VRH TType Adjusting range [WC]DG 17VCT 08 to 68DG 40VCT 2 to 16DG 110VCT 12 to 44DG 300VCT 40 to 120

Scope of delivery 1 times gas pressure switch with AWG 18 connection wires 2 times retaining screws 2 times sealing ringsMonitoring the inlet pressure pu the electrical plug of the pressure switch for gas points towards the inlet flangeMonitoring the outlet pressure pd the electrical plug of the pressure switch for gas points towards the outlet flange

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 38

A BC

D

FE

ACD

F

B

E

8 3 Bypass valvepilot gas valve VAS 18 3 1 VAS 1 attached to VADVAGVAHVAV 1Scope of delivery A 1 times bypasspilot gas valve VAS 1 B 4 times O-rings C 4 times double nuts D 4 times connection parts E 1 times mounting aidBypass valve VAS 1 F 2 times connection pipes if the bypass valve has a blind flange

at the outlet sidePilot gas valve VAS 1 F 1 times connection pipe 1 times sealing plug if the pilot gas valve

has a threaded flange at the outlet side

Accessories

8 3 2 VAS 1 attached to VADVAGVAHVAV 2 VADVAGVAHVAV 3Scope of delivery A 1 times bypasspilot gas valve VAS 1 B 4 times O-rings C 4 times spacer sleeves D 4 times connection parts E 1 times mounting aidBypass valve VAS 1 F 2 times connection pipes if the bypass valve has a blind flange

at the outlet sidePilot gas valve VAS 1 F 1 times connection pipe 1 times sealing plug if the pilot gas valve

has a threaded flange at the outlet side

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 39

2

3

456

810

20

30

405060

80100

∆p [m

bar]

005 01 02 03 05 08 1 2 3 4 51

3

2

Qn [m3h]

1

01

02

03

0405

08

003

002

6 8 10

005 01 02 03 05 08 1 2 3 4 5003 6 8 10

20

005 01 02 03 05 08 1 2 3 4 5003 6 8 10 20

30

∆p [i

nch

WC]

1

2

3

456

810

20

30

40

04

004

006

00801

02

03

0506

08

Qn [SCFH]10 40 60 100 200 3001 500 10002 3 4 5

120 306 8

21 3 4 5 6 7 8 910

8 3 3 Flow rate

The characteristic flow rate curves have been measured for bypass valve VAS 1 with connection pipe diameter 1 to 10 mm (004 to 04) and for the pilot gas valve with 10 mm (04) connection pipe

Bypass valve connection pipe diameter [mm]

Pilo

t gas

val

ve 1

0 m

m (0

4)

conn

ectio

n pi

pe d

iam

eter

Accessories gt Bypass valvepilot gas valve VAS 1

= natural gas (ρ = 080 kgm3) = propane (ρ = 201 kgm3) = air (ρ = 129 kgm3)

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 40

Accessories

8 4 Bypass valvepilot gas valve VBY 8 for VADVAGVAHVAV 1

B

C

AVBY 8

VAx 1

55

(217)40(157)

70 (276)

80(315)

Rp frac14(pilot gas valve)

For mounting on VAD VAG VAH VAV 1 and double solenoid valve VCD VCG VCH VCV 1

8 4 1 Scope of delivery VBY 8I as bypass valveA 1 times bypass valve VBY 8IB 2 times retaining screws with 4 times O-rings both retaining screws

have a bypass orificeC 1 times grease for o-rings

8 4 2 Scope of delivery VBY 8R as pilot gas valveA 1 times pilot gas valve VBY 8RB 2 times retaining screws with 5 x O-rings one retaining screw

has a bypass orifice (2 x O-rings) the other does not (3 x O-rings)

C 1 times grease for O-rings

8 4 3 SelectionType I R W Q K 6L -R -L E B D 05

VBY 8

Order exampleVBY 8RW6L-LED

8 4 4 Type codeCode DescriptionVBY Gas solenoid valve8 Nominal sizeIR

For internal gas pick-up as bypass valveFor external gas pick-up as pilot gas valve

KQW

Mains voltage 24 V DC Mains voltage 120 V AC 5060 HzMains voltage 230 V AC 5060 Hz

6L Electrical connection via plug and socket with LED-R-L

Attachment side of main valve right-hand sideAttachment side of main valve left-hand side

EB

Attached to the VAxEnclosed (separate packing unit)

05D

Nozzle diameter = 05 mm (002)Flow adjustment

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 41

2

01

02

03

05

081

3

456

810

20

30

405060

80100

∆p [m

bar]

1

3

201 02 03 05 1 2 3001 003 4

Qn [m3h]

02 03 05 1 2

01 02 05

002 006

002

002 006 1

0010006 005 01

001

0003

0006 2 3

VBY 8DVBY 805

∆p [i

nch

WC]

1

2

3

456

810

20

30

40

040506

08

1

Qn [SCFH]10 40 60 1005 2081 2 30402

01

02

03

004005006

008

Adjusting range

8 4 5 Flow rateVBY 8 D

+

-

The flow rate can be set by turning the flow rate restrictor (4 mm016 Allen screw) frac14 of a turn Flow rate 10 to 100

VBY 8 05The flow is routed through a 05 mm (002) nozzle and thus has a fixed characteristic flow rate curve Adjustment is not possible

8 4 6 Technical dataInlet pressure pu max 500 mbar (7 psig)Ambient temperature 0 to +60degC (32 to 140degF) no condensation permittedStorage temperature 0 to +40degC (32 to 104degF) no condensation permittedPower consumption 24 V = 8 W 120 V = 8 W 230 V = 95 WEnclosure IP 54

Accessories gt Bypass valvepilot gas valve VBY 8 for VADVAGVAHVAV 1

= natural gas (ρ = 080 kgm3) = propane (ρ = 201 kgm3) = air (ρ = 129 kgm3)

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 42

TC 116VB C

56(22)

49(193)

27(106)

A

A

VCx 1 VCx 2VCx 3

8 5 Tightness control TC 116Vfor VAx 1 ndash 3An adapter plate is required to attach the tightness control to the right- or left-hand side of the pressure regulator with gas solenoid valveScope of delivery A 1 times adapter plate B 2 times O-rings C 2 times retaining screwsFor attachment to left-hand side Order No 74922391 right-hand side Order No 74921995

8 6 Pressure test pointsTest points to check the inlet pressure pu and outlet pressure pdScope of delivery 1 x pressure test points with 1 x profiled sealing rings Order No 74923390

8 7 Cable gland setWhen wiring a double solenoid valve with pressure regula-tor VCx the connection boxes are to be connected using a cable gland setThe cable gland set can only be used if the connection boxes are at the same height and on the same side and if both valves are equipped either with or without a proof of closure switchVA 1 Order No 74921985 VA 2 Order No 74921986 VA 3 Order No 74921987

Accessories

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 43

A B

D

C

Accessories

8 9 Differential pressure orifice

Size PipeDN

Differential pressure orifi cewith outlet dia

1 15 17 mm 0671 20 25 mm 0981 25 30 mm 1182 40 46 mm 1813 50 58 mm 228

If pressure regulator VADVAGVAV 1 is retrofitted upstream of gas solenoid valve VAS 1 a DN 25 differential pressure orifice with outlet opening d = 30 mm (118) must be inserted at the outlet of the pressure regulatorIn the case of pressure regulator VAx 115 or VAx 120 the DN 25 differential pressure orifice must be ordered separately and retrofitted Order No 74922240

8 8 Seal set VA 1 ndash 3VA 1 Order No 74921988 VA 2 Order No 74921989 VA 3 Order No 74921990Scope of deliveryA 1 times double block seal B 2 times O-rings (flange) C 2 times O-rings (pressure switch) for pressure test pointscrew plug D 2 times sealing rings (flat sealing) and 2 times profiled sealing rings

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 44

BA

C

pd-

8 11 Attachment blockFor locked installation of pressure gauge and other acces-soriesScope of delivery A 1 times attachment block B 2 times self-tapping screws for installation C 2 times O-rings

Accessories

8 10 Retaining frameIn the event that a pressure regulator VAx is installed at a later point upstream of a gas solenoid valve VAS a measur-ing orifice VMO or a fine-adjusting valve VMV the retaining frame must be fitted at the inlet of the second device in order to fasten the differential pressure orifice at the regulator outlet Order the retaining frame separatelyRetaining frame for Size 1 Order No 74923029 Size 2 Order No 74923030 Size 3 Order No 74923031

8 12 Gas control lineFine-adjusting valve VMV can be installed on the flow rate regulator VAH for fine adjustment of the gas flow rateThe gas control line for gas outlet pressure pd- is available with 2 18 compression fittingsSize 1 Order No 74924458 Size 2 Order No 74924459

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 45

8 13 Measuring orifice VMOThe measuring orifice VMO is designed to reduce the gas and air flow rates and is installed downstream of the valVario control The measuring orifice is available with Rp internal thread (NPT internal thread) or flange to ISO 7005See wwwdocuthekcom Elster Kromschroumlder Krom-schroumlder LBE Products 03 Valves and butterfly valves valVario accessories Type of document Technical Informa-tion VMO

Accessories

8 14 Filter module VMFUsing the filter module VMF the gas flow upstream of the gas solenoid valve VAS and the airgas ratio control is cleaned The filter module is available with Rp internal thread (NPT internal thread) or flange to ISO 7005 and can also be supplied with fitted pressure switch as an optionSee wwwdocuthekcom Elster Kromschroumlder Krom-schroumlder LBE Products 03 Valves and butterfly valves valVario accessories Type of document Technical Informa-tion VMF

8 15 Fine-adjusting valve VMVThe flow rate is set using the fine-adjusting valve VMV The fine-adjusting valve is available with Rp internal thread (NPT internal thread) or flange to ISO 7005See wwwdocuthekcom Elster Kromschroumlder Krom-schroumlder LBE Products 03 Valves and butterfly valves valVario accessories Type of document Technical Infor-mation VMV

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 46

9 Technical dataGas types natural gas LPG (gaseous) biologically produced methane (max 01 -by-vol H2S) or clean air other gases on request The gas must be clean and dry in all temperature conditions and must not contain condensateCE and FM approved UL listed max inlet pressure pu 10 ndash 500 mbar (4 ndash 200 WC) FM approved (230 V AC 120 V AC 24 V DC) non opera-tional pressure 700 mbar (10 psig)ANSICSA approved (230 V AC 120 V AC 24 V DC) up to 350 mbar (5 psig)Opening time of the solenoid valve quick opening le 05 s Closing time quick closing lt 1 sMedium and ambient temperatures -20 to +60degC (-4 to +140degF) no condensation permittedStorage temperature -20 to +40degC (-4 to +104degF)Enclosure IP 65Valve housing aluminium valve seal NBRConnection flanges with internal thread Rp to ISO 7-1 NPT to ANSIASMESafety valve Class A to EN 161 Factory Mutual Research Class 7400 Process Control Valves (230 V AC 120 V AC 24 V DC) ANSI Z2121 and CSA 65 ANSI Z2118 and CSA 63Control class A to EN 88-1Control range up to 101

Mains voltage 230 V AC +10-15 5060 Hz 200 V AC +10-15 5060 Hz 120 V AC +10-15 5060 Hz 100 V AC +10-15 5060 Hz 24 V DC plusmn20Duty cycle 100Power factor of the solenoid coil cos φ = 09Power consumption

Type Voltage Power

VAx 1

24 V DC 25 W ndash100 V AC 25 W (26 VA)120 V AC 25 W (26 VA)200 V AC 25 W (26 VA)230 V AC 25 W (26 VA)

VAx 2 VAx 3

24 V DC 36 W ndash100 V AC 36 W (40 VA)120 V AC 40 W (44 VA)200 V AC 40 W (44 VA)230 V AC 40 W (44 VA)

VBY24 V DC 8 W ndash

120 V AC 8 W ndash230 V AC 95 W ndash

Cable gland M20 times 15Electrical connection cable with max 25 mm2 (AWG 12) or plug with socket to EN 175301-803

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 47

Position indicator contact rating

Type Voltage Min current(resistive load)

Max current(resistive load)

VAxS VCxS 12 ndash 250 V AC 5060 Hz 100 mA 3 AVAxG VCxG 12 ndash 30 V DC 2 mA 01 A

Position indicator switching frequency max 5 times per minute

Switching current [A]

Switching cyclescos φ = 1 cos φ = 06

01 500000 50000005 300000 250000

1 200000 1000003 100000 ndash

Limited to max 200000 cycles for heating systems

9 1 VADOutlet pressure pd VAD-25 25 ndash 25 mbar (1 ndash 10 WC) VAD-50 20 ndash 50 mbar (8 ndash 20 WC) VAD-100 35 ndash 100 mbar (14 ndash 40 WC)Combustion chamber control pressure psc (connection psa)

-20 to +20 mbar (-78 to +78 WC)

VAD

pu

pd

(psa)

9 2 VAGOutlet pressure pd 05 ndash 100 mbar (02 ndash 40 WC)Air control pressure psa 05 ndash 100 mbar (02 ndash 40 WC)

Adjusting range at low fire plusmn5 mbar (plusmn2 WC)Transmission ratio of gas to air 11The inlet pressure must always be higher than the air control pressure psa + pressure loss ∆p + 5 mbar (2 WC)

VAGpd

pu

psa

psa

VAGK 1 x 18 coupling for plastic hose (internal dia 39 mm (015) external dia 61 mm (024)) or VAGE 1 x 18 compression fitting for 6 times 1 tube or VAGA 1 x NPT 18 adapter or VAGN zero governor with breathing orifice

9 3 VAH VRHAir control pressure psa 06 ndash 100 mbar (024 ndash 40 WC) Differential air pressure ∆psa (psa - psa-) 06 ndash 50 mbar (024 ndash 197 WC) Differential gas pressure ∆pd (pd - pd-) 06 ndash 50 mbar (024 ndash 197 WC)Transmission ratio of gas to air 11The inlet pressure must always be higher than the differen-tial air pressure ∆psa + pressure loss ∆p + max gas pres-sure on burner + 5 mbar (2 WC)Adjusting range at low fire plusmn5 mbar (plusmn2 WC)

Technical data

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 48

VAHVRH

pd-

pu

psa-

psa

Connection of the air control pressure psaVAHE VRHE 3 x 18 compression fitting for 6 times 1 tube or VAHA VRHA 3 x NPT 18 adapter

9 4 VAVOutlet pressure pd 05 ndash 30 mbar (02 ndash 117 WC)Air control pressure psa 04 ndash 30 mbar (015 ndash 117 WC)Combustion chamber control pressure psc

-20 to +20 mbar (-78 to +78 WC)Min control pressure differential psa - psc 04 mbar (015 WC)Min pressure differential pd - psc 05 mbar (02 WC)Adjusting range at low fire plusmn15 mbar (plusmn06 WC)Transmission ratio of gas to air 061 to 31The inlet pressure pu must always be higher than the air control pressure psa times transmission ratio V + pressure loss ∆p + 15 mbar (06 WC)

pu

pd psapsc

VAV

VAVK 2 x plastic hose couplings (internal dia 39 mm (015) external dia 61 mm (024)) or VAVE 2 x 18 compression fitting for 6 times 1 tube or VAVA 2 x NPT 18 adapter

Technical data

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 49

9 5 Safety-specific characteristic values for VAx 1 ndash 3For SILSuitable for Safety Integrity Level SIL 1 2 3

Diagnostic coverage DC 0

Type of subsystem Type A to EN 61508-2 74312

Operating mode High demand mode pursu-ant to EN 61508-4 3512

For PLSuitable for Performance Level PL a b c d e

Category B 1 2 3 4Common cause failure CCF gt 65Application of essential safety requirements Satisfied

Application of tried-and-tested safety requirements Satisfied

For SIL and PL

B10d value

Operating cyclesVAD VAG VAV VAH 1 10094360VAD VAG VAV VAH 2 8229021VAD VAG VAV VAH 3 6363683

Hardware fault tolerance (1 valve) HFT 0

Hardware fault tolerance (2 valves) HFT 1

Safe failure fraction SFF gt 90Fraction of undetected com-mon cause failures β ge 2

Max service life under operating conditions10 years after date of production plus max 12 year in stor-age prior to first use or once the given number of operating cycles has been reached depending on which is achieved firstThe devices are suitable for single-channel systems (HFT = 0) up to SIL 2PL d and up to SIL 3PL e when two re-dundant valves are installed in a double-channel architecture (HFT = 1) provided that the complete system complies with the requirements of EN 61508ISO 13849

For a glossary of terms see page 53 (Glossary)

Technical data

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 50

nop 1hnop 1a

sB10d

T10d aPFHD (1 VAx) 1h

PFHD (2 VAx) 1h

PFDavg (1 VAx)

PFDavg (2 VAx)

Technical data gt Safety-specific characteristic values for VAx 1 ndash 3

9 5 1 Determining the PFHD value the λD value and the MTTFd value

PFHD = λD = x nop= 1MTTFd

01B10d

PFDavg = x λD x 24 x 365 x T10d 12

Type

Cycle time

suitable for

suitable for

PFHD = Probability of dangerous failure (HDM = high de-mand mode) [1hour]PFDavg = Average probability of dangerous failure on de-mand (LDM = low demand mode)λD = Mean dangerous failure rate [1hour]MTTFd = Mean time to dangerous failure [hours]nop = Demand rate (mean number of annual operations) [1hour]

9 5 2 Calculating the PFHD and PFDavg

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 51

VAD VAG VAH VAV

H1

Rp frac14(NPT frac14)

H2

E

LF

F

H4

H3

B

VAxS VAxF

L2G

G

Technical data

9 6 Dimensions

Type

Connec-tion Dimensions

WeightRpNPT DN

L L2 E F G H1 H2 H3 H4 Bmm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch kg lbs

VAx 115 12 15 75 29 ndash ndash 75 29 15 06 ndash ndash 143 56 82 32 161 63 117 46 97 38 18 40VAH 115 12 15 75 29 ndash ndash 75 29 15 06 ndash ndash 143 56 100 39 161 63 135 53 97 38 2 44VAx 120 34 20 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 82 33 161 63 117 46 97 38 19 42VAH 120 34 20 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 100 39 161 63 135 53 97 38 21 46VAx 125 1 25 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 82 33 161 63 117 46 97 38 19 42VAH 125 1 25 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 100 39 161 63 135 53 97 38 21 46VAx 240 112 40 128 50 200 79 85 33 29 11 66 26 170 67 112 44 191 75 162 64 125 49 44 97VAH 240 112 40 128 50 200 79 85 33 29 11 66 26 170 67 132 52 191 75 182 72 125 49 47 104VAx 350 2 50 155 61 230 91 85 33 36 14 74 29 180 70 135 53 201 79 196 77 160 63 61 134VAH 350 2 50 155 61 230 91 85 33 36 14 74 29 180 70 156 61 201 79 217 85 160 63 64 141

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 52

10 Converting unitssee wwwadlatusorg

11 Maintenance cyclesAt least once per annum at least twice per annum for biologi-cally produced methaneIf the flow rate drops clean the strainer

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 53

12 Glossary12 1 Diagnostic coverage DCMeasure of the effectiveness of diagnostics which may be determined as the ratio between the failure rate of detected dangerous failures and the failure rate of total dangerous failuresNOTE Diagnostic coverage can exist for the whole or parts of a safety-related system For example diagnostic cover-age could exist for sensors andor logic system andor final elements Unit see EN ISO 13849-12008

12 2 Mode of operationHigh demand mode or continuous modeOperating mode where the frequency of demands for opera-tion made on a safety-related system is greater than one per year or greater than twice the proof-test frequencysee EN 61508-42008

12 3 CategoryClassification of the safety-related parts of a control system in respect of their resistance to faults and their subsequent behaviour in the fault condition and which is achieved by the structural arrangement of the parts fault detection andor by their reliability see EN ISO 13849-12008

12 4 Common cause failure CCFFailures of different items resulting from a single event where these failures are not consequences of each othersee EN ISO 13849-12008

12 5 Fraction of undetected common cause failures β Fraction of undetected failures of redundant components due to a single event whereby these failures are not based on mutual causesNOTE β is expressed as a fraction in the equations and as a percentage elsewheresee EN 61508-62010

12 6 B10d valueMean number of cycles until 10 of the components fail dan-gerouslysee EN ISO 13849-12008

12 7 T10d valueMean time until 10 of the components fail dangerouslysee EN ISO 13849-12008

12 8 Hardware fault tolerance HFTA hardware fault tolerance of N means that N + 1 is the mini-mum number of faults that could cause a loss of the safety functionsee IEC 61508-22010

12 9 Mean dangerous failure rate λD Mean rate of dangerous failures during operation time (T10d) Unit 1hsee EN ISO 13849-12008

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 54

12 10 Safe failure fraction SFFFraction of safe failures related to all failures which are as-sumed to appearsee EN 13611A22011

12 11 Probability of dangerous failure PFHD Value describing the likelihood of dangerous failure per hour of a component for high demand mode or continuous mode Unit 1hsee EN 13611A22011

12 12 Mean time to dangerous failure MTTFd Expectation of the mean time to dangerous failuresee EN ISO 13849-12008

12 13 Demand rate nop Mean number of annual operationssee EN ISO 13849-12008

12 14 Average probability of dangerous failure on demand PFDavg (LDM = 1 ndash 10 switching cyclesyear)Average probability of a dangerous failure of the safety function on demand (LDM = low demand mode)see EN 61508-6

Glossary

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415

Finally we are offering you the opportunity to assess this ldquoTechnical Information (TI)rdquo and to give us your opinion so that we can improve our documents further and suit them to your needs

ClarityFound information quicklySearched for a long timeDidnrsquot find informationWhat is missing

ComprehensionCoherentToo complicatedNo answer

ScopeToo littleSufficientToo wideNo answer

No answer

NavigationI can find my way aroundI got ldquolostrdquoNo answer

UseTo get to know the productTo choose a productPlanningTo look for information

My scope of functionsTechnical departmentSalesNo answer

Remarks

(Adobe Reader 7 or higher required) wwwadobecom

Elster GmbH Postfach 2809 middot 49018 Osnabruumlck Strotheweg 1 middot 49504 Lotte (Buumlren) GermanyT +49 541 1214-0 F +49 541 1214-370 infokromschroedercomwwwkromschroedercom

The current addresses of our international agents are available on the Internetwwwkromschroederdeindexphpid=718ampL=1

We reserve the right to make technical modifications in the interests of progressCopyright copy 2015 Elster GmbH All rights reserved

Contact

Feedback

0325

0530

  • Pressure regulators with solenoid valve VAD VAG VAV VAH
  • Flow rate regulator VRH
  • Pressure regulators with double solenoid valve VCD VCG VCV VCH
  • Contents
  • 1 Application
    • 11 Examples of application
      • 111 Constant pressure control
      • 112 Constant pressure control with two gas solenoid valves
      • 113 Constant pressure control with max pressure switch
      • 114 Constant pressure control with non-controlled pilot gas outlet
      • 115 Modulating control
      • 116 Modulating control with two gas solenoid valves
      • 117 Modulating control with two gas solenoid valves and inlet pressure switch
      • 118 HighLow control
      • 119 Zero pressure control
      • 1110 Staged flow rate control
      • 1111 Continuous or staged flow rate control
      • 1112 Modulating control with variable airgas ratio control with gas solenoid valve
      • 1113 Modulating control in residential heat generation
          • 2 Certification
          • 3 Function
            • 31 VAD VAG VAH VRH VAV
              • 311 Pressure regulator for gas VAD
              • 312 Airgas ratio control VAG
              • 313 Flow rate regulators VAH VRH
              • 314 Variable airgas ratio control VAV
              • 315 Pressure regulator with gas solenoid valve VAxS position indicator with visual indicator
                • 32 Animation
                • 33 Connection diagram
                  • 331 VAx with M20 cable gland
                  • 332 VAx with plug
                  • 333 VAS with VADVAGVAHVAV with M20 cable gland
                  • 334 VAS with VADVAGVAHVAV with plug
                      • 4 Replacement possibilities for MODULINE pressure regulators with gas solenoid valve
                        • 41 GVS GVI GVIB GVR and GVRH are to be replaced by VAD VAG VAG+VAS VAH and VAV
                          • 5 Flow rate
                            • 51 Selection example for VAD
                              • 511 Calculate VAD
                                • 52 Selection example for VAG VAH VRH VAV
                                  • 521 CalculateVAG VxHVAV
                                    • 53 Selection example for zero governor VAGN
                                      • 531 Calculate VAGN
                                          • 6 Selection
                                            • 61 Selection table for pressure regulator with solenoid valve VAD
                                            • 62 Type code for VAD
                                            • 63 Selection table for airgas ratio control with solenoid valve VAG flow rate regulators VAH VRH
                                            • 64 Type code for VAG VAH VRH
                                            • 65 Selection table for variable airgas ratio control with solenoid valve VAV
                                            • 66 Type code for VAV
                                            • 67 Accessories
                                              • 7 Project planning information
                                                • 71 Installation
                                                  • 711 Installation position
                                                    • 72 Setting the low-fire rate on VAG VAH VRH VAV
                                                    • 73 Setting the high-fire rate on VAV
                                                      • 731 Calculation
                                                          • 8 Accessories
                                                            • 81 Gas pressure switch DGVC for VAx VRH
                                                            • 82 Gas pressure switch DGVCT for VAxT VRHT
                                                            • 83 Bypass valvepilot gas valve VAS 1
                                                              • 831 VAS 1 attached to VADVAGVAHVAV 1
                                                              • 832 VAS 1 attached to VADVAGVAHVAV 2 VADVAGVAHVAV 3
                                                              • 833 Flow rate
                                                                • 84 Bypass valvepilot gas valve VBY 8 for VADVAGVAHVAV 1
                                                                  • 841 Scope of delivery VBY 8I as bypass valve
                                                                  • 842 Scope of delivery VBY 8R as pilot gas valve
                                                                  • 843 Selection
                                                                  • 844 Type code
                                                                  • 845 Flow rate
                                                                  • 846 Technical data
                                                                    • 85 Tightness control TC 116V
                                                                    • 86 Pressure test points
                                                                    • 87 Cable gland set
                                                                    • 88 Seal set VA 1thinspndashthinsp3
                                                                    • 89 Differential pressure orifice
                                                                    • 810 Retaining frame
                                                                    • 811 Attachment block
                                                                    • 812 Gas control line
                                                                    • 813 Measuring orifice VMO
                                                                    • 814 Filter module VMF
                                                                    • 815 Fine-adjusting valve VMV
                                                                      • 9 Technical data
                                                                        • 91 VAD
                                                                        • 92 VAG
                                                                        • 93 VAH VRH
                                                                        • 94 VAV
                                                                        • 95 Safety-specific characteristic values for VAx 1thinspndashthinsp3
                                                                          • 951 Determining the PFHD value the λD value and the MTTFd value
                                                                          • 952 Calculating the PFHD and PFDavg
                                                                            • 96 Dimensions
                                                                              • 10 Converting units
                                                                              • 11 Maintenance cycles
                                                                              • 12 Glossary
                                                                                • 121 Diagnostic coverage DC
                                                                                • 122 Mode of operation
                                                                                • 123 Category
                                                                                • 124 Common cause failure CCF
                                                                                • 125 Fraction of undetected common cause failures β
                                                                                • 126 B10d value
                                                                                • 127 T10d value
                                                                                • 128 Hardware fault tolerance HFT
                                                                                • 129 Mean dangerous failure rate λD
                                                                                • 1210 Safe failure fraction SFF
                                                                                • 1211 Probability of dangerous failure PFHD
                                                                                • 1212 Mean time to dangerous failure MTTFd
                                                                                • 1213 Demand rate nop
                                                                                • 1214 Average probability of dangerous failure on demand PFDavg
                                                                                  • Feedback
                                                                                  • Contact
                                                                                      1. naechste_Seite 24
                                                                                      2. naechste Seite 18
                                                                                      3. naechste Seite 6
                                                                                      4. naechste Seite 16
                                                                                      5. naechste Seite 14
                                                                                      6. naechste Seite 25
                                                                                      7. naechste_Seite 11
                                                                                      8. naechste_Seite 17
                                                                                      9. fbArbeitspunkt_Min Ja
                                                                                      10. fbArbeitspunkt Ja
                                                                                      11. ftProgramm Standard-Programm
                                                                                      12. fz_kv
                                                                                      13. fz_pe 80
                                                                                      14. fz_pG 60
                                                                                      15. fzDelta_p_Soll 20
                                                                                      16. ftEinheit_Druck mbar
                                                                                      17. fatTyp [115]
                                                                                      18. fbArbeitspunkt_Min_2 Ja
                                                                                      19. fbArbeitspunkt_2 Ja
                                                                                      20. ftRegler_Typ VAG
                                                                                      21. ftProgramm_2 Standard-Programm
                                                                                      22. fz_kv_2
                                                                                      23. fatMedium [08]
                                                                                      24. fzDichte 08
                                                                                      25. ftEinheit_Dichte kgm3
                                                                                      26. fzV_Norm 30
                                                                                      27. ftEinheit_Volstrom m3h
                                                                                      28. fz_pe_2 80
                                                                                      29. fz_pG_2 60
                                                                                      30. fzDelta_p_Soll_2 20
                                                                                      31. ftEinheit_Druck2 [mbar]
                                                                                      32. ftEinheit_Geschw [ms]
                                                                                      33. fatTyp_2 [10954451150103322]
                                                                                      34. fbArbeitspunkt_Min_3 Ja
                                                                                      35. fbArbeitspunkt_3 Ja
                                                                                      36. ftProgramm_3 Standard-Programm
                                                                                      37. fz_kv_3
                                                                                      38. fz_pe_3 20
                                                                                      39. fz_pG_3 0
                                                                                      40. fzDelta_p_Soll_3 20
                                                                                      41. fatTyp_3 [123]
                                                                                      42. fatSchaltleistung [6363683]
                                                                                      43. fz_nop_Stunde 1
                                                                                      44. fz_nop_Jahr 8760
                                                                                      45. fzZyklus 3600
                                                                                      46. fzB10d 6363683
                                                                                      47. fzT10d 10
                                                                                      48. fzPFHd_1V 15714170551864384e-8
                                                                                      49. fzPFDavg_1V
                                                                                      50. ftGeeignet_1V PL d SIL 2
                                                                                      51. fzPFHd_2V 33505832253532625e-10
                                                                                      52. fzPFDavg_2V
                                                                                      53. ftGeeignet_2V PL e SIL 3
                                                                                      54. ftUebersicht Off
                                                                                      55. ftVerstaendlichkeit Off
                                                                                      56. ftFehlende_Info
                                                                                      57. ftUmfang Off
                                                                                      58. ftVerwendung_1 Off
                                                                                      59. ftVerwendung_2 Off
                                                                                      60. ftVerwendung_3 Off
                                                                                      61. ftVerwendung_4 Off
                                                                                      62. ftNavigation Off
                                                                                      63. ftTaetigkeitsbereich Off
                                                                                      64. ftBemerkung
                                                                                      65. Michael Rehkamp Elster Kromschroumlder>btnSenden
Page 32: VAD, VAG, VAV, VAH, VRH, VCD, VCG, VCV, VCH · PDF fileVAD, VAG, VAH, VAV, VRH, VCD, VCG, VCV, VCH · Edition 04.15 6 VAD VAD VAS 1 .1 Examples of application 1 .1 .1 Constant pressure

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 32

Selection

6 6 Type code for VAVCode DescriptionVAV Variable airgas ratio control with solenoid valve1 ndash 3 SizeT T-product15 ndash 50 Nominal inlet and outlet diameterRNF

Rp internal threadNPT internal thread

ISO fl angeN Quick opening quick closingKPQYW

Mains voltage 24 V DCMains voltage 100 V AC 5060 HzMains voltage 120 V AC 5060 HzMains voltage 200 V AC 5060 HzMains voltage 230 V AC 5060 Hz

SG

Position indicator with visual indicatorPosition indicator for 24 V with visual indicator

RL

Viewed from the right (in the direction of fl ow)Viewed from the left (in the direction of fl ow)

AB

Standard valve seatReduced valve seat

EKA

Connection kit for air control pressure psa and combus-tion chamber control pressure psc

compression fi ttingplastic hose coupling

NPT 18 adapter

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 33

Selection

6 7 AccessoriesModularly configurable withndash Screw plugsndash Pressure test pointsndash Pressure switch DGVC for inlet

andor outlet pressurendash Tightness control TCndash Bypasspilot gas valve VBY 8 for

size 1ndash Bypasspilot gas valve VAS 1For further information see page 37 (Accessories)

Position indicator

Plug with socket

Plug

Screwplugs

Pressuretest points

Pressure switch DGC Tightness

control TC

Bypasspilot gas valve VBY 8 for size 1

Bypasspilot gas valve VAS 1

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 34

7 Project planning informationDo not store or install the unit in the open airThe inlet pressure pu and the outlet pressure pd can be meas-ured on both sides of the valve body To increase the control accuracy an external impulse line can be connected instead of the pressure test point pd

VAD

pu

pd

(psa)

VAGpd

pu

psa

psa

VAD measurement point for the gas outlet pressure pd on the regulator body A combustion chamber control line (psc) can be connected to connection psa for maintaining a constant burner capacityVAG additional measurement point for the air control pressure psa on the regulator body

VAV

psapsc

pu

pd

VAH VRH

pu

pd-

pdpsa-

psa

VAV measurement point for the outlet pressure pd on the regulator bodyVAH additional measurement points for the outlet pressure pd- and the air control pressure psapsa- on the regulator body

7 1 Installation

GFK

VAGVAH

GFKVAD

Sealing material and thread cuttings must not be allowed to get into the valve housing Install a filter upstream of every system

gt20 mmgt0 79

The unit must not be in contact with masonry Minimum clear-ance 20 mm (079 inches)Ensure that there is sufficient space for installation and ad-justment

le +100 degCle +212 degF

The solenoid body heats up during operation ndash depending on ambient temperature (max 60degC140degF) and intrinsic heating (approx 40degC104degF)

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 35

In the case of double solenoid valves the position of the con-nection box can only be changed by removing the actuator and reinstalling it offset by 90deg or 180deg

If more than three valVario controls are installed in line the controls must be supported

The seals in some gas compression fittings are approved for temperatures of up to 70degC (158degF) This temperature limit will not be exceeded if the flow through the pipe is at least 1 msup3h (3531 SCFH) of gas and the maximum ambient temperature is 50degC (122degF)

7 1 1 Installation position

pu ge 80 mbar(80 hPa32 WC)

VAD VAG VAH VRH VAV

In humid environments black solenoid actuator in the vertical upright position only

VAD VAG VAH VRH black solenoid actuator in the vertical upright position or tilted up to the horizontal not upside downVAG VAH horizontal position only if pu ge 80 mbar (32 WC))VAV installation in the vertical position only black solenoid actuator in the vertical upright positionTo ensure that the airgas ratio control VAG the flow rate regulator VAH VRH or the variable airgas ratio control VAV can react quickly when the load is changed the impulse line for the air control pressure psa and for VAV the impulse line for the combustion chamber control pressure psc should be kept as short as possible The tube internal diameter for the impulse line must always be ge 39 mm (015)

VAH VRHIt is not permitted to install a gas solenoid valve VAS down-stream of flow rate regulator VAH VRH and upstream of fine-adjusting valve VMV The VAS would no longer be able to perform its function as a second safety valve if installed in the above-mentioned position

M

VMV

VAH

VASVAS

pd-

psa-psa

VMV

VAH pd-

psa-psa

The measuring orifice in the air line for impulse lines psa and psa- must always be installed downstream of the air control valve

Project planning information gt Installation

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 36

VAVThe impulse line for the combustion chamber control pres-sure psc must be fitted so that no condensation can enter the pressure regulator but rather flows back into the combustion chamber

7 2 Setting the low-fire rate on VAG VAH VRH VAV

-10 +05-05

ndash

+1

-15

mbar

+15

06

1 152

3

N V

+ +ndash

+30 -15+15

ndash

-3

+5

mbar

-5

N

+

VAG VAH VRH VAV

If the burner operates at low-fire rate the gasair mixture can be changed using the parallel shift of the characteristic curve by turning the adjusting screw ldquoNrdquoAdjusting range at low fire VAG VAH VRH -5 to +5 mbar (-195 to +195 WC) VAV -15 to +15 mbar (-06 to +06 WC)

7 3 Setting the high-fire rate on VAVTo set the high-fire rate the transmission ratio is changed us-ing the adjusting screw ldquoVrdquo until the required flue gas values are achievedTransmission ratio V = pdpsa = 061 to 31The settings N and V can influence each other and must be repeated if necessary

+N+V

-V

-N

VAV

psa [mbar]

p d [m

bar]

7 3 1 CalculationWith no connection to the combustion chamber control pres-sure psc pd = V times psa + NWith connection to the combustion chamber control pressure psc (pd - psc) = V times (psa - psc) + N

Project planning information

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 37

pu pd

21579

4836

085310

189

142

8 Accessories8 1 Gas pressure switch DG VC for VAx VRHType Adjusting range [mbar]DG 17VC 2 to 17DG 40VC 5 to 40DG 110VC 30 to 110DG 300VC 100 to 300

Scope of delivery 1 times pressure switch for gas 2 times retaining screws 2 times sealing rings

8 2 Gas pressure switch DG VCT for VAx T VRH TType Adjusting range [WC]DG 17VCT 08 to 68DG 40VCT 2 to 16DG 110VCT 12 to 44DG 300VCT 40 to 120

Scope of delivery 1 times gas pressure switch with AWG 18 connection wires 2 times retaining screws 2 times sealing ringsMonitoring the inlet pressure pu the electrical plug of the pressure switch for gas points towards the inlet flangeMonitoring the outlet pressure pd the electrical plug of the pressure switch for gas points towards the outlet flange

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 38

A BC

D

FE

ACD

F

B

E

8 3 Bypass valvepilot gas valve VAS 18 3 1 VAS 1 attached to VADVAGVAHVAV 1Scope of delivery A 1 times bypasspilot gas valve VAS 1 B 4 times O-rings C 4 times double nuts D 4 times connection parts E 1 times mounting aidBypass valve VAS 1 F 2 times connection pipes if the bypass valve has a blind flange

at the outlet sidePilot gas valve VAS 1 F 1 times connection pipe 1 times sealing plug if the pilot gas valve

has a threaded flange at the outlet side

Accessories

8 3 2 VAS 1 attached to VADVAGVAHVAV 2 VADVAGVAHVAV 3Scope of delivery A 1 times bypasspilot gas valve VAS 1 B 4 times O-rings C 4 times spacer sleeves D 4 times connection parts E 1 times mounting aidBypass valve VAS 1 F 2 times connection pipes if the bypass valve has a blind flange

at the outlet sidePilot gas valve VAS 1 F 1 times connection pipe 1 times sealing plug if the pilot gas valve

has a threaded flange at the outlet side

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 39

2

3

456

810

20

30

405060

80100

∆p [m

bar]

005 01 02 03 05 08 1 2 3 4 51

3

2

Qn [m3h]

1

01

02

03

0405

08

003

002

6 8 10

005 01 02 03 05 08 1 2 3 4 5003 6 8 10

20

005 01 02 03 05 08 1 2 3 4 5003 6 8 10 20

30

∆p [i

nch

WC]

1

2

3

456

810

20

30

40

04

004

006

00801

02

03

0506

08

Qn [SCFH]10 40 60 100 200 3001 500 10002 3 4 5

120 306 8

21 3 4 5 6 7 8 910

8 3 3 Flow rate

The characteristic flow rate curves have been measured for bypass valve VAS 1 with connection pipe diameter 1 to 10 mm (004 to 04) and for the pilot gas valve with 10 mm (04) connection pipe

Bypass valve connection pipe diameter [mm]

Pilo

t gas

val

ve 1

0 m

m (0

4)

conn

ectio

n pi

pe d

iam

eter

Accessories gt Bypass valvepilot gas valve VAS 1

= natural gas (ρ = 080 kgm3) = propane (ρ = 201 kgm3) = air (ρ = 129 kgm3)

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 40

Accessories

8 4 Bypass valvepilot gas valve VBY 8 for VADVAGVAHVAV 1

B

C

AVBY 8

VAx 1

55

(217)40(157)

70 (276)

80(315)

Rp frac14(pilot gas valve)

For mounting on VAD VAG VAH VAV 1 and double solenoid valve VCD VCG VCH VCV 1

8 4 1 Scope of delivery VBY 8I as bypass valveA 1 times bypass valve VBY 8IB 2 times retaining screws with 4 times O-rings both retaining screws

have a bypass orificeC 1 times grease for o-rings

8 4 2 Scope of delivery VBY 8R as pilot gas valveA 1 times pilot gas valve VBY 8RB 2 times retaining screws with 5 x O-rings one retaining screw

has a bypass orifice (2 x O-rings) the other does not (3 x O-rings)

C 1 times grease for O-rings

8 4 3 SelectionType I R W Q K 6L -R -L E B D 05

VBY 8

Order exampleVBY 8RW6L-LED

8 4 4 Type codeCode DescriptionVBY Gas solenoid valve8 Nominal sizeIR

For internal gas pick-up as bypass valveFor external gas pick-up as pilot gas valve

KQW

Mains voltage 24 V DC Mains voltage 120 V AC 5060 HzMains voltage 230 V AC 5060 Hz

6L Electrical connection via plug and socket with LED-R-L

Attachment side of main valve right-hand sideAttachment side of main valve left-hand side

EB

Attached to the VAxEnclosed (separate packing unit)

05D

Nozzle diameter = 05 mm (002)Flow adjustment

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 41

2

01

02

03

05

081

3

456

810

20

30

405060

80100

∆p [m

bar]

1

3

201 02 03 05 1 2 3001 003 4

Qn [m3h]

02 03 05 1 2

01 02 05

002 006

002

002 006 1

0010006 005 01

001

0003

0006 2 3

VBY 8DVBY 805

∆p [i

nch

WC]

1

2

3

456

810

20

30

40

040506

08

1

Qn [SCFH]10 40 60 1005 2081 2 30402

01

02

03

004005006

008

Adjusting range

8 4 5 Flow rateVBY 8 D

+

-

The flow rate can be set by turning the flow rate restrictor (4 mm016 Allen screw) frac14 of a turn Flow rate 10 to 100

VBY 8 05The flow is routed through a 05 mm (002) nozzle and thus has a fixed characteristic flow rate curve Adjustment is not possible

8 4 6 Technical dataInlet pressure pu max 500 mbar (7 psig)Ambient temperature 0 to +60degC (32 to 140degF) no condensation permittedStorage temperature 0 to +40degC (32 to 104degF) no condensation permittedPower consumption 24 V = 8 W 120 V = 8 W 230 V = 95 WEnclosure IP 54

Accessories gt Bypass valvepilot gas valve VBY 8 for VADVAGVAHVAV 1

= natural gas (ρ = 080 kgm3) = propane (ρ = 201 kgm3) = air (ρ = 129 kgm3)

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 42

TC 116VB C

56(22)

49(193)

27(106)

A

A

VCx 1 VCx 2VCx 3

8 5 Tightness control TC 116Vfor VAx 1 ndash 3An adapter plate is required to attach the tightness control to the right- or left-hand side of the pressure regulator with gas solenoid valveScope of delivery A 1 times adapter plate B 2 times O-rings C 2 times retaining screwsFor attachment to left-hand side Order No 74922391 right-hand side Order No 74921995

8 6 Pressure test pointsTest points to check the inlet pressure pu and outlet pressure pdScope of delivery 1 x pressure test points with 1 x profiled sealing rings Order No 74923390

8 7 Cable gland setWhen wiring a double solenoid valve with pressure regula-tor VCx the connection boxes are to be connected using a cable gland setThe cable gland set can only be used if the connection boxes are at the same height and on the same side and if both valves are equipped either with or without a proof of closure switchVA 1 Order No 74921985 VA 2 Order No 74921986 VA 3 Order No 74921987

Accessories

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 43

A B

D

C

Accessories

8 9 Differential pressure orifice

Size PipeDN

Differential pressure orifi cewith outlet dia

1 15 17 mm 0671 20 25 mm 0981 25 30 mm 1182 40 46 mm 1813 50 58 mm 228

If pressure regulator VADVAGVAV 1 is retrofitted upstream of gas solenoid valve VAS 1 a DN 25 differential pressure orifice with outlet opening d = 30 mm (118) must be inserted at the outlet of the pressure regulatorIn the case of pressure regulator VAx 115 or VAx 120 the DN 25 differential pressure orifice must be ordered separately and retrofitted Order No 74922240

8 8 Seal set VA 1 ndash 3VA 1 Order No 74921988 VA 2 Order No 74921989 VA 3 Order No 74921990Scope of deliveryA 1 times double block seal B 2 times O-rings (flange) C 2 times O-rings (pressure switch) for pressure test pointscrew plug D 2 times sealing rings (flat sealing) and 2 times profiled sealing rings

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 44

BA

C

pd-

8 11 Attachment blockFor locked installation of pressure gauge and other acces-soriesScope of delivery A 1 times attachment block B 2 times self-tapping screws for installation C 2 times O-rings

Accessories

8 10 Retaining frameIn the event that a pressure regulator VAx is installed at a later point upstream of a gas solenoid valve VAS a measur-ing orifice VMO or a fine-adjusting valve VMV the retaining frame must be fitted at the inlet of the second device in order to fasten the differential pressure orifice at the regulator outlet Order the retaining frame separatelyRetaining frame for Size 1 Order No 74923029 Size 2 Order No 74923030 Size 3 Order No 74923031

8 12 Gas control lineFine-adjusting valve VMV can be installed on the flow rate regulator VAH for fine adjustment of the gas flow rateThe gas control line for gas outlet pressure pd- is available with 2 18 compression fittingsSize 1 Order No 74924458 Size 2 Order No 74924459

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 45

8 13 Measuring orifice VMOThe measuring orifice VMO is designed to reduce the gas and air flow rates and is installed downstream of the valVario control The measuring orifice is available with Rp internal thread (NPT internal thread) or flange to ISO 7005See wwwdocuthekcom Elster Kromschroumlder Krom-schroumlder LBE Products 03 Valves and butterfly valves valVario accessories Type of document Technical Informa-tion VMO

Accessories

8 14 Filter module VMFUsing the filter module VMF the gas flow upstream of the gas solenoid valve VAS and the airgas ratio control is cleaned The filter module is available with Rp internal thread (NPT internal thread) or flange to ISO 7005 and can also be supplied with fitted pressure switch as an optionSee wwwdocuthekcom Elster Kromschroumlder Krom-schroumlder LBE Products 03 Valves and butterfly valves valVario accessories Type of document Technical Informa-tion VMF

8 15 Fine-adjusting valve VMVThe flow rate is set using the fine-adjusting valve VMV The fine-adjusting valve is available with Rp internal thread (NPT internal thread) or flange to ISO 7005See wwwdocuthekcom Elster Kromschroumlder Krom-schroumlder LBE Products 03 Valves and butterfly valves valVario accessories Type of document Technical Infor-mation VMV

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 46

9 Technical dataGas types natural gas LPG (gaseous) biologically produced methane (max 01 -by-vol H2S) or clean air other gases on request The gas must be clean and dry in all temperature conditions and must not contain condensateCE and FM approved UL listed max inlet pressure pu 10 ndash 500 mbar (4 ndash 200 WC) FM approved (230 V AC 120 V AC 24 V DC) non opera-tional pressure 700 mbar (10 psig)ANSICSA approved (230 V AC 120 V AC 24 V DC) up to 350 mbar (5 psig)Opening time of the solenoid valve quick opening le 05 s Closing time quick closing lt 1 sMedium and ambient temperatures -20 to +60degC (-4 to +140degF) no condensation permittedStorage temperature -20 to +40degC (-4 to +104degF)Enclosure IP 65Valve housing aluminium valve seal NBRConnection flanges with internal thread Rp to ISO 7-1 NPT to ANSIASMESafety valve Class A to EN 161 Factory Mutual Research Class 7400 Process Control Valves (230 V AC 120 V AC 24 V DC) ANSI Z2121 and CSA 65 ANSI Z2118 and CSA 63Control class A to EN 88-1Control range up to 101

Mains voltage 230 V AC +10-15 5060 Hz 200 V AC +10-15 5060 Hz 120 V AC +10-15 5060 Hz 100 V AC +10-15 5060 Hz 24 V DC plusmn20Duty cycle 100Power factor of the solenoid coil cos φ = 09Power consumption

Type Voltage Power

VAx 1

24 V DC 25 W ndash100 V AC 25 W (26 VA)120 V AC 25 W (26 VA)200 V AC 25 W (26 VA)230 V AC 25 W (26 VA)

VAx 2 VAx 3

24 V DC 36 W ndash100 V AC 36 W (40 VA)120 V AC 40 W (44 VA)200 V AC 40 W (44 VA)230 V AC 40 W (44 VA)

VBY24 V DC 8 W ndash

120 V AC 8 W ndash230 V AC 95 W ndash

Cable gland M20 times 15Electrical connection cable with max 25 mm2 (AWG 12) or plug with socket to EN 175301-803

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 47

Position indicator contact rating

Type Voltage Min current(resistive load)

Max current(resistive load)

VAxS VCxS 12 ndash 250 V AC 5060 Hz 100 mA 3 AVAxG VCxG 12 ndash 30 V DC 2 mA 01 A

Position indicator switching frequency max 5 times per minute

Switching current [A]

Switching cyclescos φ = 1 cos φ = 06

01 500000 50000005 300000 250000

1 200000 1000003 100000 ndash

Limited to max 200000 cycles for heating systems

9 1 VADOutlet pressure pd VAD-25 25 ndash 25 mbar (1 ndash 10 WC) VAD-50 20 ndash 50 mbar (8 ndash 20 WC) VAD-100 35 ndash 100 mbar (14 ndash 40 WC)Combustion chamber control pressure psc (connection psa)

-20 to +20 mbar (-78 to +78 WC)

VAD

pu

pd

(psa)

9 2 VAGOutlet pressure pd 05 ndash 100 mbar (02 ndash 40 WC)Air control pressure psa 05 ndash 100 mbar (02 ndash 40 WC)

Adjusting range at low fire plusmn5 mbar (plusmn2 WC)Transmission ratio of gas to air 11The inlet pressure must always be higher than the air control pressure psa + pressure loss ∆p + 5 mbar (2 WC)

VAGpd

pu

psa

psa

VAGK 1 x 18 coupling for plastic hose (internal dia 39 mm (015) external dia 61 mm (024)) or VAGE 1 x 18 compression fitting for 6 times 1 tube or VAGA 1 x NPT 18 adapter or VAGN zero governor with breathing orifice

9 3 VAH VRHAir control pressure psa 06 ndash 100 mbar (024 ndash 40 WC) Differential air pressure ∆psa (psa - psa-) 06 ndash 50 mbar (024 ndash 197 WC) Differential gas pressure ∆pd (pd - pd-) 06 ndash 50 mbar (024 ndash 197 WC)Transmission ratio of gas to air 11The inlet pressure must always be higher than the differen-tial air pressure ∆psa + pressure loss ∆p + max gas pres-sure on burner + 5 mbar (2 WC)Adjusting range at low fire plusmn5 mbar (plusmn2 WC)

Technical data

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 48

VAHVRH

pd-

pu

psa-

psa

Connection of the air control pressure psaVAHE VRHE 3 x 18 compression fitting for 6 times 1 tube or VAHA VRHA 3 x NPT 18 adapter

9 4 VAVOutlet pressure pd 05 ndash 30 mbar (02 ndash 117 WC)Air control pressure psa 04 ndash 30 mbar (015 ndash 117 WC)Combustion chamber control pressure psc

-20 to +20 mbar (-78 to +78 WC)Min control pressure differential psa - psc 04 mbar (015 WC)Min pressure differential pd - psc 05 mbar (02 WC)Adjusting range at low fire plusmn15 mbar (plusmn06 WC)Transmission ratio of gas to air 061 to 31The inlet pressure pu must always be higher than the air control pressure psa times transmission ratio V + pressure loss ∆p + 15 mbar (06 WC)

pu

pd psapsc

VAV

VAVK 2 x plastic hose couplings (internal dia 39 mm (015) external dia 61 mm (024)) or VAVE 2 x 18 compression fitting for 6 times 1 tube or VAVA 2 x NPT 18 adapter

Technical data

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 49

9 5 Safety-specific characteristic values for VAx 1 ndash 3For SILSuitable for Safety Integrity Level SIL 1 2 3

Diagnostic coverage DC 0

Type of subsystem Type A to EN 61508-2 74312

Operating mode High demand mode pursu-ant to EN 61508-4 3512

For PLSuitable for Performance Level PL a b c d e

Category B 1 2 3 4Common cause failure CCF gt 65Application of essential safety requirements Satisfied

Application of tried-and-tested safety requirements Satisfied

For SIL and PL

B10d value

Operating cyclesVAD VAG VAV VAH 1 10094360VAD VAG VAV VAH 2 8229021VAD VAG VAV VAH 3 6363683

Hardware fault tolerance (1 valve) HFT 0

Hardware fault tolerance (2 valves) HFT 1

Safe failure fraction SFF gt 90Fraction of undetected com-mon cause failures β ge 2

Max service life under operating conditions10 years after date of production plus max 12 year in stor-age prior to first use or once the given number of operating cycles has been reached depending on which is achieved firstThe devices are suitable for single-channel systems (HFT = 0) up to SIL 2PL d and up to SIL 3PL e when two re-dundant valves are installed in a double-channel architecture (HFT = 1) provided that the complete system complies with the requirements of EN 61508ISO 13849

For a glossary of terms see page 53 (Glossary)

Technical data

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 50

nop 1hnop 1a

sB10d

T10d aPFHD (1 VAx) 1h

PFHD (2 VAx) 1h

PFDavg (1 VAx)

PFDavg (2 VAx)

Technical data gt Safety-specific characteristic values for VAx 1 ndash 3

9 5 1 Determining the PFHD value the λD value and the MTTFd value

PFHD = λD = x nop= 1MTTFd

01B10d

PFDavg = x λD x 24 x 365 x T10d 12

Type

Cycle time

suitable for

suitable for

PFHD = Probability of dangerous failure (HDM = high de-mand mode) [1hour]PFDavg = Average probability of dangerous failure on de-mand (LDM = low demand mode)λD = Mean dangerous failure rate [1hour]MTTFd = Mean time to dangerous failure [hours]nop = Demand rate (mean number of annual operations) [1hour]

9 5 2 Calculating the PFHD and PFDavg

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 51

VAD VAG VAH VAV

H1

Rp frac14(NPT frac14)

H2

E

LF

F

H4

H3

B

VAxS VAxF

L2G

G

Technical data

9 6 Dimensions

Type

Connec-tion Dimensions

WeightRpNPT DN

L L2 E F G H1 H2 H3 H4 Bmm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch kg lbs

VAx 115 12 15 75 29 ndash ndash 75 29 15 06 ndash ndash 143 56 82 32 161 63 117 46 97 38 18 40VAH 115 12 15 75 29 ndash ndash 75 29 15 06 ndash ndash 143 56 100 39 161 63 135 53 97 38 2 44VAx 120 34 20 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 82 33 161 63 117 46 97 38 19 42VAH 120 34 20 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 100 39 161 63 135 53 97 38 21 46VAx 125 1 25 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 82 33 161 63 117 46 97 38 19 42VAH 125 1 25 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 100 39 161 63 135 53 97 38 21 46VAx 240 112 40 128 50 200 79 85 33 29 11 66 26 170 67 112 44 191 75 162 64 125 49 44 97VAH 240 112 40 128 50 200 79 85 33 29 11 66 26 170 67 132 52 191 75 182 72 125 49 47 104VAx 350 2 50 155 61 230 91 85 33 36 14 74 29 180 70 135 53 201 79 196 77 160 63 61 134VAH 350 2 50 155 61 230 91 85 33 36 14 74 29 180 70 156 61 201 79 217 85 160 63 64 141

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 52

10 Converting unitssee wwwadlatusorg

11 Maintenance cyclesAt least once per annum at least twice per annum for biologi-cally produced methaneIf the flow rate drops clean the strainer

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 53

12 Glossary12 1 Diagnostic coverage DCMeasure of the effectiveness of diagnostics which may be determined as the ratio between the failure rate of detected dangerous failures and the failure rate of total dangerous failuresNOTE Diagnostic coverage can exist for the whole or parts of a safety-related system For example diagnostic cover-age could exist for sensors andor logic system andor final elements Unit see EN ISO 13849-12008

12 2 Mode of operationHigh demand mode or continuous modeOperating mode where the frequency of demands for opera-tion made on a safety-related system is greater than one per year or greater than twice the proof-test frequencysee EN 61508-42008

12 3 CategoryClassification of the safety-related parts of a control system in respect of their resistance to faults and their subsequent behaviour in the fault condition and which is achieved by the structural arrangement of the parts fault detection andor by their reliability see EN ISO 13849-12008

12 4 Common cause failure CCFFailures of different items resulting from a single event where these failures are not consequences of each othersee EN ISO 13849-12008

12 5 Fraction of undetected common cause failures β Fraction of undetected failures of redundant components due to a single event whereby these failures are not based on mutual causesNOTE β is expressed as a fraction in the equations and as a percentage elsewheresee EN 61508-62010

12 6 B10d valueMean number of cycles until 10 of the components fail dan-gerouslysee EN ISO 13849-12008

12 7 T10d valueMean time until 10 of the components fail dangerouslysee EN ISO 13849-12008

12 8 Hardware fault tolerance HFTA hardware fault tolerance of N means that N + 1 is the mini-mum number of faults that could cause a loss of the safety functionsee IEC 61508-22010

12 9 Mean dangerous failure rate λD Mean rate of dangerous failures during operation time (T10d) Unit 1hsee EN ISO 13849-12008

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 54

12 10 Safe failure fraction SFFFraction of safe failures related to all failures which are as-sumed to appearsee EN 13611A22011

12 11 Probability of dangerous failure PFHD Value describing the likelihood of dangerous failure per hour of a component for high demand mode or continuous mode Unit 1hsee EN 13611A22011

12 12 Mean time to dangerous failure MTTFd Expectation of the mean time to dangerous failuresee EN ISO 13849-12008

12 13 Demand rate nop Mean number of annual operationssee EN ISO 13849-12008

12 14 Average probability of dangerous failure on demand PFDavg (LDM = 1 ndash 10 switching cyclesyear)Average probability of a dangerous failure of the safety function on demand (LDM = low demand mode)see EN 61508-6

Glossary

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415

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Remarks

(Adobe Reader 7 or higher required) wwwadobecom

Elster GmbH Postfach 2809 middot 49018 Osnabruumlck Strotheweg 1 middot 49504 Lotte (Buumlren) GermanyT +49 541 1214-0 F +49 541 1214-370 infokromschroedercomwwwkromschroedercom

The current addresses of our international agents are available on the Internetwwwkromschroederdeindexphpid=718ampL=1

We reserve the right to make technical modifications in the interests of progressCopyright copy 2015 Elster GmbH All rights reserved

Contact

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0325

0530

  • Pressure regulators with solenoid valve VAD VAG VAV VAH
  • Flow rate regulator VRH
  • Pressure regulators with double solenoid valve VCD VCG VCV VCH
  • Contents
  • 1 Application
    • 11 Examples of application
      • 111 Constant pressure control
      • 112 Constant pressure control with two gas solenoid valves
      • 113 Constant pressure control with max pressure switch
      • 114 Constant pressure control with non-controlled pilot gas outlet
      • 115 Modulating control
      • 116 Modulating control with two gas solenoid valves
      • 117 Modulating control with two gas solenoid valves and inlet pressure switch
      • 118 HighLow control
      • 119 Zero pressure control
      • 1110 Staged flow rate control
      • 1111 Continuous or staged flow rate control
      • 1112 Modulating control with variable airgas ratio control with gas solenoid valve
      • 1113 Modulating control in residential heat generation
          • 2 Certification
          • 3 Function
            • 31 VAD VAG VAH VRH VAV
              • 311 Pressure regulator for gas VAD
              • 312 Airgas ratio control VAG
              • 313 Flow rate regulators VAH VRH
              • 314 Variable airgas ratio control VAV
              • 315 Pressure regulator with gas solenoid valve VAxS position indicator with visual indicator
                • 32 Animation
                • 33 Connection diagram
                  • 331 VAx with M20 cable gland
                  • 332 VAx with plug
                  • 333 VAS with VADVAGVAHVAV with M20 cable gland
                  • 334 VAS with VADVAGVAHVAV with plug
                      • 4 Replacement possibilities for MODULINE pressure regulators with gas solenoid valve
                        • 41 GVS GVI GVIB GVR and GVRH are to be replaced by VAD VAG VAG+VAS VAH and VAV
                          • 5 Flow rate
                            • 51 Selection example for VAD
                              • 511 Calculate VAD
                                • 52 Selection example for VAG VAH VRH VAV
                                  • 521 CalculateVAG VxHVAV
                                    • 53 Selection example for zero governor VAGN
                                      • 531 Calculate VAGN
                                          • 6 Selection
                                            • 61 Selection table for pressure regulator with solenoid valve VAD
                                            • 62 Type code for VAD
                                            • 63 Selection table for airgas ratio control with solenoid valve VAG flow rate regulators VAH VRH
                                            • 64 Type code for VAG VAH VRH
                                            • 65 Selection table for variable airgas ratio control with solenoid valve VAV
                                            • 66 Type code for VAV
                                            • 67 Accessories
                                              • 7 Project planning information
                                                • 71 Installation
                                                  • 711 Installation position
                                                    • 72 Setting the low-fire rate on VAG VAH VRH VAV
                                                    • 73 Setting the high-fire rate on VAV
                                                      • 731 Calculation
                                                          • 8 Accessories
                                                            • 81 Gas pressure switch DGVC for VAx VRH
                                                            • 82 Gas pressure switch DGVCT for VAxT VRHT
                                                            • 83 Bypass valvepilot gas valve VAS 1
                                                              • 831 VAS 1 attached to VADVAGVAHVAV 1
                                                              • 832 VAS 1 attached to VADVAGVAHVAV 2 VADVAGVAHVAV 3
                                                              • 833 Flow rate
                                                                • 84 Bypass valvepilot gas valve VBY 8 for VADVAGVAHVAV 1
                                                                  • 841 Scope of delivery VBY 8I as bypass valve
                                                                  • 842 Scope of delivery VBY 8R as pilot gas valve
                                                                  • 843 Selection
                                                                  • 844 Type code
                                                                  • 845 Flow rate
                                                                  • 846 Technical data
                                                                    • 85 Tightness control TC 116V
                                                                    • 86 Pressure test points
                                                                    • 87 Cable gland set
                                                                    • 88 Seal set VA 1thinspndashthinsp3
                                                                    • 89 Differential pressure orifice
                                                                    • 810 Retaining frame
                                                                    • 811 Attachment block
                                                                    • 812 Gas control line
                                                                    • 813 Measuring orifice VMO
                                                                    • 814 Filter module VMF
                                                                    • 815 Fine-adjusting valve VMV
                                                                      • 9 Technical data
                                                                        • 91 VAD
                                                                        • 92 VAG
                                                                        • 93 VAH VRH
                                                                        • 94 VAV
                                                                        • 95 Safety-specific characteristic values for VAx 1thinspndashthinsp3
                                                                          • 951 Determining the PFHD value the λD value and the MTTFd value
                                                                          • 952 Calculating the PFHD and PFDavg
                                                                            • 96 Dimensions
                                                                              • 10 Converting units
                                                                              • 11 Maintenance cycles
                                                                              • 12 Glossary
                                                                                • 121 Diagnostic coverage DC
                                                                                • 122 Mode of operation
                                                                                • 123 Category
                                                                                • 124 Common cause failure CCF
                                                                                • 125 Fraction of undetected common cause failures β
                                                                                • 126 B10d value
                                                                                • 127 T10d value
                                                                                • 128 Hardware fault tolerance HFT
                                                                                • 129 Mean dangerous failure rate λD
                                                                                • 1210 Safe failure fraction SFF
                                                                                • 1211 Probability of dangerous failure PFHD
                                                                                • 1212 Mean time to dangerous failure MTTFd
                                                                                • 1213 Demand rate nop
                                                                                • 1214 Average probability of dangerous failure on demand PFDavg
                                                                                  • Feedback
                                                                                  • Contact
                                                                                      1. naechste_Seite 24
                                                                                      2. naechste Seite 18
                                                                                      3. naechste Seite 6
                                                                                      4. naechste Seite 16
                                                                                      5. naechste Seite 14
                                                                                      6. naechste Seite 25
                                                                                      7. naechste_Seite 11
                                                                                      8. naechste_Seite 17
                                                                                      9. fbArbeitspunkt_Min Ja
                                                                                      10. fbArbeitspunkt Ja
                                                                                      11. ftProgramm Standard-Programm
                                                                                      12. fz_kv
                                                                                      13. fz_pe 80
                                                                                      14. fz_pG 60
                                                                                      15. fzDelta_p_Soll 20
                                                                                      16. ftEinheit_Druck mbar
                                                                                      17. fatTyp [115]
                                                                                      18. fbArbeitspunkt_Min_2 Ja
                                                                                      19. fbArbeitspunkt_2 Ja
                                                                                      20. ftRegler_Typ VAG
                                                                                      21. ftProgramm_2 Standard-Programm
                                                                                      22. fz_kv_2
                                                                                      23. fatMedium [08]
                                                                                      24. fzDichte 08
                                                                                      25. ftEinheit_Dichte kgm3
                                                                                      26. fzV_Norm 30
                                                                                      27. ftEinheit_Volstrom m3h
                                                                                      28. fz_pe_2 80
                                                                                      29. fz_pG_2 60
                                                                                      30. fzDelta_p_Soll_2 20
                                                                                      31. ftEinheit_Druck2 [mbar]
                                                                                      32. ftEinheit_Geschw [ms]
                                                                                      33. fatTyp_2 [10954451150103322]
                                                                                      34. fbArbeitspunkt_Min_3 Ja
                                                                                      35. fbArbeitspunkt_3 Ja
                                                                                      36. ftProgramm_3 Standard-Programm
                                                                                      37. fz_kv_3
                                                                                      38. fz_pe_3 20
                                                                                      39. fz_pG_3 0
                                                                                      40. fzDelta_p_Soll_3 20
                                                                                      41. fatTyp_3 [123]
                                                                                      42. fatSchaltleistung [6363683]
                                                                                      43. fz_nop_Stunde 1
                                                                                      44. fz_nop_Jahr 8760
                                                                                      45. fzZyklus 3600
                                                                                      46. fzB10d 6363683
                                                                                      47. fzT10d 10
                                                                                      48. fzPFHd_1V 15714170551864384e-8
                                                                                      49. fzPFDavg_1V
                                                                                      50. ftGeeignet_1V PL d SIL 2
                                                                                      51. fzPFHd_2V 33505832253532625e-10
                                                                                      52. fzPFDavg_2V
                                                                                      53. ftGeeignet_2V PL e SIL 3
                                                                                      54. ftUebersicht Off
                                                                                      55. ftVerstaendlichkeit Off
                                                                                      56. ftFehlende_Info
                                                                                      57. ftUmfang Off
                                                                                      58. ftVerwendung_1 Off
                                                                                      59. ftVerwendung_2 Off
                                                                                      60. ftVerwendung_3 Off
                                                                                      61. ftVerwendung_4 Off
                                                                                      62. ftNavigation Off
                                                                                      63. ftTaetigkeitsbereich Off
                                                                                      64. ftBemerkung
                                                                                      65. Michael Rehkamp Elster Kromschroumlder>btnSenden
Page 33: VAD, VAG, VAV, VAH, VRH, VCD, VCG, VCV, VCH · PDF fileVAD, VAG, VAH, VAV, VRH, VCD, VCG, VCV, VCH · Edition 04.15 6 VAD VAD VAS 1 .1 Examples of application 1 .1 .1 Constant pressure

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 33

Selection

6 7 AccessoriesModularly configurable withndash Screw plugsndash Pressure test pointsndash Pressure switch DGVC for inlet

andor outlet pressurendash Tightness control TCndash Bypasspilot gas valve VBY 8 for

size 1ndash Bypasspilot gas valve VAS 1For further information see page 37 (Accessories)

Position indicator

Plug with socket

Plug

Screwplugs

Pressuretest points

Pressure switch DGC Tightness

control TC

Bypasspilot gas valve VBY 8 for size 1

Bypasspilot gas valve VAS 1

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 34

7 Project planning informationDo not store or install the unit in the open airThe inlet pressure pu and the outlet pressure pd can be meas-ured on both sides of the valve body To increase the control accuracy an external impulse line can be connected instead of the pressure test point pd

VAD

pu

pd

(psa)

VAGpd

pu

psa

psa

VAD measurement point for the gas outlet pressure pd on the regulator body A combustion chamber control line (psc) can be connected to connection psa for maintaining a constant burner capacityVAG additional measurement point for the air control pressure psa on the regulator body

VAV

psapsc

pu

pd

VAH VRH

pu

pd-

pdpsa-

psa

VAV measurement point for the outlet pressure pd on the regulator bodyVAH additional measurement points for the outlet pressure pd- and the air control pressure psapsa- on the regulator body

7 1 Installation

GFK

VAGVAH

GFKVAD

Sealing material and thread cuttings must not be allowed to get into the valve housing Install a filter upstream of every system

gt20 mmgt0 79

The unit must not be in contact with masonry Minimum clear-ance 20 mm (079 inches)Ensure that there is sufficient space for installation and ad-justment

le +100 degCle +212 degF

The solenoid body heats up during operation ndash depending on ambient temperature (max 60degC140degF) and intrinsic heating (approx 40degC104degF)

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 35

In the case of double solenoid valves the position of the con-nection box can only be changed by removing the actuator and reinstalling it offset by 90deg or 180deg

If more than three valVario controls are installed in line the controls must be supported

The seals in some gas compression fittings are approved for temperatures of up to 70degC (158degF) This temperature limit will not be exceeded if the flow through the pipe is at least 1 msup3h (3531 SCFH) of gas and the maximum ambient temperature is 50degC (122degF)

7 1 1 Installation position

pu ge 80 mbar(80 hPa32 WC)

VAD VAG VAH VRH VAV

In humid environments black solenoid actuator in the vertical upright position only

VAD VAG VAH VRH black solenoid actuator in the vertical upright position or tilted up to the horizontal not upside downVAG VAH horizontal position only if pu ge 80 mbar (32 WC))VAV installation in the vertical position only black solenoid actuator in the vertical upright positionTo ensure that the airgas ratio control VAG the flow rate regulator VAH VRH or the variable airgas ratio control VAV can react quickly when the load is changed the impulse line for the air control pressure psa and for VAV the impulse line for the combustion chamber control pressure psc should be kept as short as possible The tube internal diameter for the impulse line must always be ge 39 mm (015)

VAH VRHIt is not permitted to install a gas solenoid valve VAS down-stream of flow rate regulator VAH VRH and upstream of fine-adjusting valve VMV The VAS would no longer be able to perform its function as a second safety valve if installed in the above-mentioned position

M

VMV

VAH

VASVAS

pd-

psa-psa

VMV

VAH pd-

psa-psa

The measuring orifice in the air line for impulse lines psa and psa- must always be installed downstream of the air control valve

Project planning information gt Installation

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 36

VAVThe impulse line for the combustion chamber control pres-sure psc must be fitted so that no condensation can enter the pressure regulator but rather flows back into the combustion chamber

7 2 Setting the low-fire rate on VAG VAH VRH VAV

-10 +05-05

ndash

+1

-15

mbar

+15

06

1 152

3

N V

+ +ndash

+30 -15+15

ndash

-3

+5

mbar

-5

N

+

VAG VAH VRH VAV

If the burner operates at low-fire rate the gasair mixture can be changed using the parallel shift of the characteristic curve by turning the adjusting screw ldquoNrdquoAdjusting range at low fire VAG VAH VRH -5 to +5 mbar (-195 to +195 WC) VAV -15 to +15 mbar (-06 to +06 WC)

7 3 Setting the high-fire rate on VAVTo set the high-fire rate the transmission ratio is changed us-ing the adjusting screw ldquoVrdquo until the required flue gas values are achievedTransmission ratio V = pdpsa = 061 to 31The settings N and V can influence each other and must be repeated if necessary

+N+V

-V

-N

VAV

psa [mbar]

p d [m

bar]

7 3 1 CalculationWith no connection to the combustion chamber control pres-sure psc pd = V times psa + NWith connection to the combustion chamber control pressure psc (pd - psc) = V times (psa - psc) + N

Project planning information

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 37

pu pd

21579

4836

085310

189

142

8 Accessories8 1 Gas pressure switch DG VC for VAx VRHType Adjusting range [mbar]DG 17VC 2 to 17DG 40VC 5 to 40DG 110VC 30 to 110DG 300VC 100 to 300

Scope of delivery 1 times pressure switch for gas 2 times retaining screws 2 times sealing rings

8 2 Gas pressure switch DG VCT for VAx T VRH TType Adjusting range [WC]DG 17VCT 08 to 68DG 40VCT 2 to 16DG 110VCT 12 to 44DG 300VCT 40 to 120

Scope of delivery 1 times gas pressure switch with AWG 18 connection wires 2 times retaining screws 2 times sealing ringsMonitoring the inlet pressure pu the electrical plug of the pressure switch for gas points towards the inlet flangeMonitoring the outlet pressure pd the electrical plug of the pressure switch for gas points towards the outlet flange

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 38

A BC

D

FE

ACD

F

B

E

8 3 Bypass valvepilot gas valve VAS 18 3 1 VAS 1 attached to VADVAGVAHVAV 1Scope of delivery A 1 times bypasspilot gas valve VAS 1 B 4 times O-rings C 4 times double nuts D 4 times connection parts E 1 times mounting aidBypass valve VAS 1 F 2 times connection pipes if the bypass valve has a blind flange

at the outlet sidePilot gas valve VAS 1 F 1 times connection pipe 1 times sealing plug if the pilot gas valve

has a threaded flange at the outlet side

Accessories

8 3 2 VAS 1 attached to VADVAGVAHVAV 2 VADVAGVAHVAV 3Scope of delivery A 1 times bypasspilot gas valve VAS 1 B 4 times O-rings C 4 times spacer sleeves D 4 times connection parts E 1 times mounting aidBypass valve VAS 1 F 2 times connection pipes if the bypass valve has a blind flange

at the outlet sidePilot gas valve VAS 1 F 1 times connection pipe 1 times sealing plug if the pilot gas valve

has a threaded flange at the outlet side

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 39

2

3

456

810

20

30

405060

80100

∆p [m

bar]

005 01 02 03 05 08 1 2 3 4 51

3

2

Qn [m3h]

1

01

02

03

0405

08

003

002

6 8 10

005 01 02 03 05 08 1 2 3 4 5003 6 8 10

20

005 01 02 03 05 08 1 2 3 4 5003 6 8 10 20

30

∆p [i

nch

WC]

1

2

3

456

810

20

30

40

04

004

006

00801

02

03

0506

08

Qn [SCFH]10 40 60 100 200 3001 500 10002 3 4 5

120 306 8

21 3 4 5 6 7 8 910

8 3 3 Flow rate

The characteristic flow rate curves have been measured for bypass valve VAS 1 with connection pipe diameter 1 to 10 mm (004 to 04) and for the pilot gas valve with 10 mm (04) connection pipe

Bypass valve connection pipe diameter [mm]

Pilo

t gas

val

ve 1

0 m

m (0

4)

conn

ectio

n pi

pe d

iam

eter

Accessories gt Bypass valvepilot gas valve VAS 1

= natural gas (ρ = 080 kgm3) = propane (ρ = 201 kgm3) = air (ρ = 129 kgm3)

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 40

Accessories

8 4 Bypass valvepilot gas valve VBY 8 for VADVAGVAHVAV 1

B

C

AVBY 8

VAx 1

55

(217)40(157)

70 (276)

80(315)

Rp frac14(pilot gas valve)

For mounting on VAD VAG VAH VAV 1 and double solenoid valve VCD VCG VCH VCV 1

8 4 1 Scope of delivery VBY 8I as bypass valveA 1 times bypass valve VBY 8IB 2 times retaining screws with 4 times O-rings both retaining screws

have a bypass orificeC 1 times grease for o-rings

8 4 2 Scope of delivery VBY 8R as pilot gas valveA 1 times pilot gas valve VBY 8RB 2 times retaining screws with 5 x O-rings one retaining screw

has a bypass orifice (2 x O-rings) the other does not (3 x O-rings)

C 1 times grease for O-rings

8 4 3 SelectionType I R W Q K 6L -R -L E B D 05

VBY 8

Order exampleVBY 8RW6L-LED

8 4 4 Type codeCode DescriptionVBY Gas solenoid valve8 Nominal sizeIR

For internal gas pick-up as bypass valveFor external gas pick-up as pilot gas valve

KQW

Mains voltage 24 V DC Mains voltage 120 V AC 5060 HzMains voltage 230 V AC 5060 Hz

6L Electrical connection via plug and socket with LED-R-L

Attachment side of main valve right-hand sideAttachment side of main valve left-hand side

EB

Attached to the VAxEnclosed (separate packing unit)

05D

Nozzle diameter = 05 mm (002)Flow adjustment

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 41

2

01

02

03

05

081

3

456

810

20

30

405060

80100

∆p [m

bar]

1

3

201 02 03 05 1 2 3001 003 4

Qn [m3h]

02 03 05 1 2

01 02 05

002 006

002

002 006 1

0010006 005 01

001

0003

0006 2 3

VBY 8DVBY 805

∆p [i

nch

WC]

1

2

3

456

810

20

30

40

040506

08

1

Qn [SCFH]10 40 60 1005 2081 2 30402

01

02

03

004005006

008

Adjusting range

8 4 5 Flow rateVBY 8 D

+

-

The flow rate can be set by turning the flow rate restrictor (4 mm016 Allen screw) frac14 of a turn Flow rate 10 to 100

VBY 8 05The flow is routed through a 05 mm (002) nozzle and thus has a fixed characteristic flow rate curve Adjustment is not possible

8 4 6 Technical dataInlet pressure pu max 500 mbar (7 psig)Ambient temperature 0 to +60degC (32 to 140degF) no condensation permittedStorage temperature 0 to +40degC (32 to 104degF) no condensation permittedPower consumption 24 V = 8 W 120 V = 8 W 230 V = 95 WEnclosure IP 54

Accessories gt Bypass valvepilot gas valve VBY 8 for VADVAGVAHVAV 1

= natural gas (ρ = 080 kgm3) = propane (ρ = 201 kgm3) = air (ρ = 129 kgm3)

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 42

TC 116VB C

56(22)

49(193)

27(106)

A

A

VCx 1 VCx 2VCx 3

8 5 Tightness control TC 116Vfor VAx 1 ndash 3An adapter plate is required to attach the tightness control to the right- or left-hand side of the pressure regulator with gas solenoid valveScope of delivery A 1 times adapter plate B 2 times O-rings C 2 times retaining screwsFor attachment to left-hand side Order No 74922391 right-hand side Order No 74921995

8 6 Pressure test pointsTest points to check the inlet pressure pu and outlet pressure pdScope of delivery 1 x pressure test points with 1 x profiled sealing rings Order No 74923390

8 7 Cable gland setWhen wiring a double solenoid valve with pressure regula-tor VCx the connection boxes are to be connected using a cable gland setThe cable gland set can only be used if the connection boxes are at the same height and on the same side and if both valves are equipped either with or without a proof of closure switchVA 1 Order No 74921985 VA 2 Order No 74921986 VA 3 Order No 74921987

Accessories

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 43

A B

D

C

Accessories

8 9 Differential pressure orifice

Size PipeDN

Differential pressure orifi cewith outlet dia

1 15 17 mm 0671 20 25 mm 0981 25 30 mm 1182 40 46 mm 1813 50 58 mm 228

If pressure regulator VADVAGVAV 1 is retrofitted upstream of gas solenoid valve VAS 1 a DN 25 differential pressure orifice with outlet opening d = 30 mm (118) must be inserted at the outlet of the pressure regulatorIn the case of pressure regulator VAx 115 or VAx 120 the DN 25 differential pressure orifice must be ordered separately and retrofitted Order No 74922240

8 8 Seal set VA 1 ndash 3VA 1 Order No 74921988 VA 2 Order No 74921989 VA 3 Order No 74921990Scope of deliveryA 1 times double block seal B 2 times O-rings (flange) C 2 times O-rings (pressure switch) for pressure test pointscrew plug D 2 times sealing rings (flat sealing) and 2 times profiled sealing rings

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 44

BA

C

pd-

8 11 Attachment blockFor locked installation of pressure gauge and other acces-soriesScope of delivery A 1 times attachment block B 2 times self-tapping screws for installation C 2 times O-rings

Accessories

8 10 Retaining frameIn the event that a pressure regulator VAx is installed at a later point upstream of a gas solenoid valve VAS a measur-ing orifice VMO or a fine-adjusting valve VMV the retaining frame must be fitted at the inlet of the second device in order to fasten the differential pressure orifice at the regulator outlet Order the retaining frame separatelyRetaining frame for Size 1 Order No 74923029 Size 2 Order No 74923030 Size 3 Order No 74923031

8 12 Gas control lineFine-adjusting valve VMV can be installed on the flow rate regulator VAH for fine adjustment of the gas flow rateThe gas control line for gas outlet pressure pd- is available with 2 18 compression fittingsSize 1 Order No 74924458 Size 2 Order No 74924459

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 45

8 13 Measuring orifice VMOThe measuring orifice VMO is designed to reduce the gas and air flow rates and is installed downstream of the valVario control The measuring orifice is available with Rp internal thread (NPT internal thread) or flange to ISO 7005See wwwdocuthekcom Elster Kromschroumlder Krom-schroumlder LBE Products 03 Valves and butterfly valves valVario accessories Type of document Technical Informa-tion VMO

Accessories

8 14 Filter module VMFUsing the filter module VMF the gas flow upstream of the gas solenoid valve VAS and the airgas ratio control is cleaned The filter module is available with Rp internal thread (NPT internal thread) or flange to ISO 7005 and can also be supplied with fitted pressure switch as an optionSee wwwdocuthekcom Elster Kromschroumlder Krom-schroumlder LBE Products 03 Valves and butterfly valves valVario accessories Type of document Technical Informa-tion VMF

8 15 Fine-adjusting valve VMVThe flow rate is set using the fine-adjusting valve VMV The fine-adjusting valve is available with Rp internal thread (NPT internal thread) or flange to ISO 7005See wwwdocuthekcom Elster Kromschroumlder Krom-schroumlder LBE Products 03 Valves and butterfly valves valVario accessories Type of document Technical Infor-mation VMV

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 46

9 Technical dataGas types natural gas LPG (gaseous) biologically produced methane (max 01 -by-vol H2S) or clean air other gases on request The gas must be clean and dry in all temperature conditions and must not contain condensateCE and FM approved UL listed max inlet pressure pu 10 ndash 500 mbar (4 ndash 200 WC) FM approved (230 V AC 120 V AC 24 V DC) non opera-tional pressure 700 mbar (10 psig)ANSICSA approved (230 V AC 120 V AC 24 V DC) up to 350 mbar (5 psig)Opening time of the solenoid valve quick opening le 05 s Closing time quick closing lt 1 sMedium and ambient temperatures -20 to +60degC (-4 to +140degF) no condensation permittedStorage temperature -20 to +40degC (-4 to +104degF)Enclosure IP 65Valve housing aluminium valve seal NBRConnection flanges with internal thread Rp to ISO 7-1 NPT to ANSIASMESafety valve Class A to EN 161 Factory Mutual Research Class 7400 Process Control Valves (230 V AC 120 V AC 24 V DC) ANSI Z2121 and CSA 65 ANSI Z2118 and CSA 63Control class A to EN 88-1Control range up to 101

Mains voltage 230 V AC +10-15 5060 Hz 200 V AC +10-15 5060 Hz 120 V AC +10-15 5060 Hz 100 V AC +10-15 5060 Hz 24 V DC plusmn20Duty cycle 100Power factor of the solenoid coil cos φ = 09Power consumption

Type Voltage Power

VAx 1

24 V DC 25 W ndash100 V AC 25 W (26 VA)120 V AC 25 W (26 VA)200 V AC 25 W (26 VA)230 V AC 25 W (26 VA)

VAx 2 VAx 3

24 V DC 36 W ndash100 V AC 36 W (40 VA)120 V AC 40 W (44 VA)200 V AC 40 W (44 VA)230 V AC 40 W (44 VA)

VBY24 V DC 8 W ndash

120 V AC 8 W ndash230 V AC 95 W ndash

Cable gland M20 times 15Electrical connection cable with max 25 mm2 (AWG 12) or plug with socket to EN 175301-803

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 47

Position indicator contact rating

Type Voltage Min current(resistive load)

Max current(resistive load)

VAxS VCxS 12 ndash 250 V AC 5060 Hz 100 mA 3 AVAxG VCxG 12 ndash 30 V DC 2 mA 01 A

Position indicator switching frequency max 5 times per minute

Switching current [A]

Switching cyclescos φ = 1 cos φ = 06

01 500000 50000005 300000 250000

1 200000 1000003 100000 ndash

Limited to max 200000 cycles for heating systems

9 1 VADOutlet pressure pd VAD-25 25 ndash 25 mbar (1 ndash 10 WC) VAD-50 20 ndash 50 mbar (8 ndash 20 WC) VAD-100 35 ndash 100 mbar (14 ndash 40 WC)Combustion chamber control pressure psc (connection psa)

-20 to +20 mbar (-78 to +78 WC)

VAD

pu

pd

(psa)

9 2 VAGOutlet pressure pd 05 ndash 100 mbar (02 ndash 40 WC)Air control pressure psa 05 ndash 100 mbar (02 ndash 40 WC)

Adjusting range at low fire plusmn5 mbar (plusmn2 WC)Transmission ratio of gas to air 11The inlet pressure must always be higher than the air control pressure psa + pressure loss ∆p + 5 mbar (2 WC)

VAGpd

pu

psa

psa

VAGK 1 x 18 coupling for plastic hose (internal dia 39 mm (015) external dia 61 mm (024)) or VAGE 1 x 18 compression fitting for 6 times 1 tube or VAGA 1 x NPT 18 adapter or VAGN zero governor with breathing orifice

9 3 VAH VRHAir control pressure psa 06 ndash 100 mbar (024 ndash 40 WC) Differential air pressure ∆psa (psa - psa-) 06 ndash 50 mbar (024 ndash 197 WC) Differential gas pressure ∆pd (pd - pd-) 06 ndash 50 mbar (024 ndash 197 WC)Transmission ratio of gas to air 11The inlet pressure must always be higher than the differen-tial air pressure ∆psa + pressure loss ∆p + max gas pres-sure on burner + 5 mbar (2 WC)Adjusting range at low fire plusmn5 mbar (plusmn2 WC)

Technical data

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 48

VAHVRH

pd-

pu

psa-

psa

Connection of the air control pressure psaVAHE VRHE 3 x 18 compression fitting for 6 times 1 tube or VAHA VRHA 3 x NPT 18 adapter

9 4 VAVOutlet pressure pd 05 ndash 30 mbar (02 ndash 117 WC)Air control pressure psa 04 ndash 30 mbar (015 ndash 117 WC)Combustion chamber control pressure psc

-20 to +20 mbar (-78 to +78 WC)Min control pressure differential psa - psc 04 mbar (015 WC)Min pressure differential pd - psc 05 mbar (02 WC)Adjusting range at low fire plusmn15 mbar (plusmn06 WC)Transmission ratio of gas to air 061 to 31The inlet pressure pu must always be higher than the air control pressure psa times transmission ratio V + pressure loss ∆p + 15 mbar (06 WC)

pu

pd psapsc

VAV

VAVK 2 x plastic hose couplings (internal dia 39 mm (015) external dia 61 mm (024)) or VAVE 2 x 18 compression fitting for 6 times 1 tube or VAVA 2 x NPT 18 adapter

Technical data

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 49

9 5 Safety-specific characteristic values for VAx 1 ndash 3For SILSuitable for Safety Integrity Level SIL 1 2 3

Diagnostic coverage DC 0

Type of subsystem Type A to EN 61508-2 74312

Operating mode High demand mode pursu-ant to EN 61508-4 3512

For PLSuitable for Performance Level PL a b c d e

Category B 1 2 3 4Common cause failure CCF gt 65Application of essential safety requirements Satisfied

Application of tried-and-tested safety requirements Satisfied

For SIL and PL

B10d value

Operating cyclesVAD VAG VAV VAH 1 10094360VAD VAG VAV VAH 2 8229021VAD VAG VAV VAH 3 6363683

Hardware fault tolerance (1 valve) HFT 0

Hardware fault tolerance (2 valves) HFT 1

Safe failure fraction SFF gt 90Fraction of undetected com-mon cause failures β ge 2

Max service life under operating conditions10 years after date of production plus max 12 year in stor-age prior to first use or once the given number of operating cycles has been reached depending on which is achieved firstThe devices are suitable for single-channel systems (HFT = 0) up to SIL 2PL d and up to SIL 3PL e when two re-dundant valves are installed in a double-channel architecture (HFT = 1) provided that the complete system complies with the requirements of EN 61508ISO 13849

For a glossary of terms see page 53 (Glossary)

Technical data

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 50

nop 1hnop 1a

sB10d

T10d aPFHD (1 VAx) 1h

PFHD (2 VAx) 1h

PFDavg (1 VAx)

PFDavg (2 VAx)

Technical data gt Safety-specific characteristic values for VAx 1 ndash 3

9 5 1 Determining the PFHD value the λD value and the MTTFd value

PFHD = λD = x nop= 1MTTFd

01B10d

PFDavg = x λD x 24 x 365 x T10d 12

Type

Cycle time

suitable for

suitable for

PFHD = Probability of dangerous failure (HDM = high de-mand mode) [1hour]PFDavg = Average probability of dangerous failure on de-mand (LDM = low demand mode)λD = Mean dangerous failure rate [1hour]MTTFd = Mean time to dangerous failure [hours]nop = Demand rate (mean number of annual operations) [1hour]

9 5 2 Calculating the PFHD and PFDavg

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 51

VAD VAG VAH VAV

H1

Rp frac14(NPT frac14)

H2

E

LF

F

H4

H3

B

VAxS VAxF

L2G

G

Technical data

9 6 Dimensions

Type

Connec-tion Dimensions

WeightRpNPT DN

L L2 E F G H1 H2 H3 H4 Bmm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch kg lbs

VAx 115 12 15 75 29 ndash ndash 75 29 15 06 ndash ndash 143 56 82 32 161 63 117 46 97 38 18 40VAH 115 12 15 75 29 ndash ndash 75 29 15 06 ndash ndash 143 56 100 39 161 63 135 53 97 38 2 44VAx 120 34 20 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 82 33 161 63 117 46 97 38 19 42VAH 120 34 20 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 100 39 161 63 135 53 97 38 21 46VAx 125 1 25 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 82 33 161 63 117 46 97 38 19 42VAH 125 1 25 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 100 39 161 63 135 53 97 38 21 46VAx 240 112 40 128 50 200 79 85 33 29 11 66 26 170 67 112 44 191 75 162 64 125 49 44 97VAH 240 112 40 128 50 200 79 85 33 29 11 66 26 170 67 132 52 191 75 182 72 125 49 47 104VAx 350 2 50 155 61 230 91 85 33 36 14 74 29 180 70 135 53 201 79 196 77 160 63 61 134VAH 350 2 50 155 61 230 91 85 33 36 14 74 29 180 70 156 61 201 79 217 85 160 63 64 141

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 52

10 Converting unitssee wwwadlatusorg

11 Maintenance cyclesAt least once per annum at least twice per annum for biologi-cally produced methaneIf the flow rate drops clean the strainer

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 53

12 Glossary12 1 Diagnostic coverage DCMeasure of the effectiveness of diagnostics which may be determined as the ratio between the failure rate of detected dangerous failures and the failure rate of total dangerous failuresNOTE Diagnostic coverage can exist for the whole or parts of a safety-related system For example diagnostic cover-age could exist for sensors andor logic system andor final elements Unit see EN ISO 13849-12008

12 2 Mode of operationHigh demand mode or continuous modeOperating mode where the frequency of demands for opera-tion made on a safety-related system is greater than one per year or greater than twice the proof-test frequencysee EN 61508-42008

12 3 CategoryClassification of the safety-related parts of a control system in respect of their resistance to faults and their subsequent behaviour in the fault condition and which is achieved by the structural arrangement of the parts fault detection andor by their reliability see EN ISO 13849-12008

12 4 Common cause failure CCFFailures of different items resulting from a single event where these failures are not consequences of each othersee EN ISO 13849-12008

12 5 Fraction of undetected common cause failures β Fraction of undetected failures of redundant components due to a single event whereby these failures are not based on mutual causesNOTE β is expressed as a fraction in the equations and as a percentage elsewheresee EN 61508-62010

12 6 B10d valueMean number of cycles until 10 of the components fail dan-gerouslysee EN ISO 13849-12008

12 7 T10d valueMean time until 10 of the components fail dangerouslysee EN ISO 13849-12008

12 8 Hardware fault tolerance HFTA hardware fault tolerance of N means that N + 1 is the mini-mum number of faults that could cause a loss of the safety functionsee IEC 61508-22010

12 9 Mean dangerous failure rate λD Mean rate of dangerous failures during operation time (T10d) Unit 1hsee EN ISO 13849-12008

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 54

12 10 Safe failure fraction SFFFraction of safe failures related to all failures which are as-sumed to appearsee EN 13611A22011

12 11 Probability of dangerous failure PFHD Value describing the likelihood of dangerous failure per hour of a component for high demand mode or continuous mode Unit 1hsee EN 13611A22011

12 12 Mean time to dangerous failure MTTFd Expectation of the mean time to dangerous failuresee EN ISO 13849-12008

12 13 Demand rate nop Mean number of annual operationssee EN ISO 13849-12008

12 14 Average probability of dangerous failure on demand PFDavg (LDM = 1 ndash 10 switching cyclesyear)Average probability of a dangerous failure of the safety function on demand (LDM = low demand mode)see EN 61508-6

Glossary

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415

Finally we are offering you the opportunity to assess this ldquoTechnical Information (TI)rdquo and to give us your opinion so that we can improve our documents further and suit them to your needs

ClarityFound information quicklySearched for a long timeDidnrsquot find informationWhat is missing

ComprehensionCoherentToo complicatedNo answer

ScopeToo littleSufficientToo wideNo answer

No answer

NavigationI can find my way aroundI got ldquolostrdquoNo answer

UseTo get to know the productTo choose a productPlanningTo look for information

My scope of functionsTechnical departmentSalesNo answer

Remarks

(Adobe Reader 7 or higher required) wwwadobecom

Elster GmbH Postfach 2809 middot 49018 Osnabruumlck Strotheweg 1 middot 49504 Lotte (Buumlren) GermanyT +49 541 1214-0 F +49 541 1214-370 infokromschroedercomwwwkromschroedercom

The current addresses of our international agents are available on the Internetwwwkromschroederdeindexphpid=718ampL=1

We reserve the right to make technical modifications in the interests of progressCopyright copy 2015 Elster GmbH All rights reserved

Contact

Feedback

0325

0530

  • Pressure regulators with solenoid valve VAD VAG VAV VAH
  • Flow rate regulator VRH
  • Pressure regulators with double solenoid valve VCD VCG VCV VCH
  • Contents
  • 1 Application
    • 11 Examples of application
      • 111 Constant pressure control
      • 112 Constant pressure control with two gas solenoid valves
      • 113 Constant pressure control with max pressure switch
      • 114 Constant pressure control with non-controlled pilot gas outlet
      • 115 Modulating control
      • 116 Modulating control with two gas solenoid valves
      • 117 Modulating control with two gas solenoid valves and inlet pressure switch
      • 118 HighLow control
      • 119 Zero pressure control
      • 1110 Staged flow rate control
      • 1111 Continuous or staged flow rate control
      • 1112 Modulating control with variable airgas ratio control with gas solenoid valve
      • 1113 Modulating control in residential heat generation
          • 2 Certification
          • 3 Function
            • 31 VAD VAG VAH VRH VAV
              • 311 Pressure regulator for gas VAD
              • 312 Airgas ratio control VAG
              • 313 Flow rate regulators VAH VRH
              • 314 Variable airgas ratio control VAV
              • 315 Pressure regulator with gas solenoid valve VAxS position indicator with visual indicator
                • 32 Animation
                • 33 Connection diagram
                  • 331 VAx with M20 cable gland
                  • 332 VAx with plug
                  • 333 VAS with VADVAGVAHVAV with M20 cable gland
                  • 334 VAS with VADVAGVAHVAV with plug
                      • 4 Replacement possibilities for MODULINE pressure regulators with gas solenoid valve
                        • 41 GVS GVI GVIB GVR and GVRH are to be replaced by VAD VAG VAG+VAS VAH and VAV
                          • 5 Flow rate
                            • 51 Selection example for VAD
                              • 511 Calculate VAD
                                • 52 Selection example for VAG VAH VRH VAV
                                  • 521 CalculateVAG VxHVAV
                                    • 53 Selection example for zero governor VAGN
                                      • 531 Calculate VAGN
                                          • 6 Selection
                                            • 61 Selection table for pressure regulator with solenoid valve VAD
                                            • 62 Type code for VAD
                                            • 63 Selection table for airgas ratio control with solenoid valve VAG flow rate regulators VAH VRH
                                            • 64 Type code for VAG VAH VRH
                                            • 65 Selection table for variable airgas ratio control with solenoid valve VAV
                                            • 66 Type code for VAV
                                            • 67 Accessories
                                              • 7 Project planning information
                                                • 71 Installation
                                                  • 711 Installation position
                                                    • 72 Setting the low-fire rate on VAG VAH VRH VAV
                                                    • 73 Setting the high-fire rate on VAV
                                                      • 731 Calculation
                                                          • 8 Accessories
                                                            • 81 Gas pressure switch DGVC for VAx VRH
                                                            • 82 Gas pressure switch DGVCT for VAxT VRHT
                                                            • 83 Bypass valvepilot gas valve VAS 1
                                                              • 831 VAS 1 attached to VADVAGVAHVAV 1
                                                              • 832 VAS 1 attached to VADVAGVAHVAV 2 VADVAGVAHVAV 3
                                                              • 833 Flow rate
                                                                • 84 Bypass valvepilot gas valve VBY 8 for VADVAGVAHVAV 1
                                                                  • 841 Scope of delivery VBY 8I as bypass valve
                                                                  • 842 Scope of delivery VBY 8R as pilot gas valve
                                                                  • 843 Selection
                                                                  • 844 Type code
                                                                  • 845 Flow rate
                                                                  • 846 Technical data
                                                                    • 85 Tightness control TC 116V
                                                                    • 86 Pressure test points
                                                                    • 87 Cable gland set
                                                                    • 88 Seal set VA 1thinspndashthinsp3
                                                                    • 89 Differential pressure orifice
                                                                    • 810 Retaining frame
                                                                    • 811 Attachment block
                                                                    • 812 Gas control line
                                                                    • 813 Measuring orifice VMO
                                                                    • 814 Filter module VMF
                                                                    • 815 Fine-adjusting valve VMV
                                                                      • 9 Technical data
                                                                        • 91 VAD
                                                                        • 92 VAG
                                                                        • 93 VAH VRH
                                                                        • 94 VAV
                                                                        • 95 Safety-specific characteristic values for VAx 1thinspndashthinsp3
                                                                          • 951 Determining the PFHD value the λD value and the MTTFd value
                                                                          • 952 Calculating the PFHD and PFDavg
                                                                            • 96 Dimensions
                                                                              • 10 Converting units
                                                                              • 11 Maintenance cycles
                                                                              • 12 Glossary
                                                                                • 121 Diagnostic coverage DC
                                                                                • 122 Mode of operation
                                                                                • 123 Category
                                                                                • 124 Common cause failure CCF
                                                                                • 125 Fraction of undetected common cause failures β
                                                                                • 126 B10d value
                                                                                • 127 T10d value
                                                                                • 128 Hardware fault tolerance HFT
                                                                                • 129 Mean dangerous failure rate λD
                                                                                • 1210 Safe failure fraction SFF
                                                                                • 1211 Probability of dangerous failure PFHD
                                                                                • 1212 Mean time to dangerous failure MTTFd
                                                                                • 1213 Demand rate nop
                                                                                • 1214 Average probability of dangerous failure on demand PFDavg
                                                                                  • Feedback
                                                                                  • Contact
                                                                                      1. naechste_Seite 24
                                                                                      2. naechste Seite 18
                                                                                      3. naechste Seite 6
                                                                                      4. naechste Seite 16
                                                                                      5. naechste Seite 14
                                                                                      6. naechste Seite 25
                                                                                      7. naechste_Seite 11
                                                                                      8. naechste_Seite 17
                                                                                      9. fbArbeitspunkt_Min Ja
                                                                                      10. fbArbeitspunkt Ja
                                                                                      11. ftProgramm Standard-Programm
                                                                                      12. fz_kv
                                                                                      13. fz_pe 80
                                                                                      14. fz_pG 60
                                                                                      15. fzDelta_p_Soll 20
                                                                                      16. ftEinheit_Druck mbar
                                                                                      17. fatTyp [115]
                                                                                      18. fbArbeitspunkt_Min_2 Ja
                                                                                      19. fbArbeitspunkt_2 Ja
                                                                                      20. ftRegler_Typ VAG
                                                                                      21. ftProgramm_2 Standard-Programm
                                                                                      22. fz_kv_2
                                                                                      23. fatMedium [08]
                                                                                      24. fzDichte 08
                                                                                      25. ftEinheit_Dichte kgm3
                                                                                      26. fzV_Norm 30
                                                                                      27. ftEinheit_Volstrom m3h
                                                                                      28. fz_pe_2 80
                                                                                      29. fz_pG_2 60
                                                                                      30. fzDelta_p_Soll_2 20
                                                                                      31. ftEinheit_Druck2 [mbar]
                                                                                      32. ftEinheit_Geschw [ms]
                                                                                      33. fatTyp_2 [10954451150103322]
                                                                                      34. fbArbeitspunkt_Min_3 Ja
                                                                                      35. fbArbeitspunkt_3 Ja
                                                                                      36. ftProgramm_3 Standard-Programm
                                                                                      37. fz_kv_3
                                                                                      38. fz_pe_3 20
                                                                                      39. fz_pG_3 0
                                                                                      40. fzDelta_p_Soll_3 20
                                                                                      41. fatTyp_3 [123]
                                                                                      42. fatSchaltleistung [6363683]
                                                                                      43. fz_nop_Stunde 1
                                                                                      44. fz_nop_Jahr 8760
                                                                                      45. fzZyklus 3600
                                                                                      46. fzB10d 6363683
                                                                                      47. fzT10d 10
                                                                                      48. fzPFHd_1V 15714170551864384e-8
                                                                                      49. fzPFDavg_1V
                                                                                      50. ftGeeignet_1V PL d SIL 2
                                                                                      51. fzPFHd_2V 33505832253532625e-10
                                                                                      52. fzPFDavg_2V
                                                                                      53. ftGeeignet_2V PL e SIL 3
                                                                                      54. ftUebersicht Off
                                                                                      55. ftVerstaendlichkeit Off
                                                                                      56. ftFehlende_Info
                                                                                      57. ftUmfang Off
                                                                                      58. ftVerwendung_1 Off
                                                                                      59. ftVerwendung_2 Off
                                                                                      60. ftVerwendung_3 Off
                                                                                      61. ftVerwendung_4 Off
                                                                                      62. ftNavigation Off
                                                                                      63. ftTaetigkeitsbereich Off
                                                                                      64. ftBemerkung
                                                                                      65. Michael Rehkamp Elster Kromschroumlder>btnSenden
Page 34: VAD, VAG, VAV, VAH, VRH, VCD, VCG, VCV, VCH · PDF fileVAD, VAG, VAH, VAV, VRH, VCD, VCG, VCV, VCH · Edition 04.15 6 VAD VAD VAS 1 .1 Examples of application 1 .1 .1 Constant pressure

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 34

7 Project planning informationDo not store or install the unit in the open airThe inlet pressure pu and the outlet pressure pd can be meas-ured on both sides of the valve body To increase the control accuracy an external impulse line can be connected instead of the pressure test point pd

VAD

pu

pd

(psa)

VAGpd

pu

psa

psa

VAD measurement point for the gas outlet pressure pd on the regulator body A combustion chamber control line (psc) can be connected to connection psa for maintaining a constant burner capacityVAG additional measurement point for the air control pressure psa on the regulator body

VAV

psapsc

pu

pd

VAH VRH

pu

pd-

pdpsa-

psa

VAV measurement point for the outlet pressure pd on the regulator bodyVAH additional measurement points for the outlet pressure pd- and the air control pressure psapsa- on the regulator body

7 1 Installation

GFK

VAGVAH

GFKVAD

Sealing material and thread cuttings must not be allowed to get into the valve housing Install a filter upstream of every system

gt20 mmgt0 79

The unit must not be in contact with masonry Minimum clear-ance 20 mm (079 inches)Ensure that there is sufficient space for installation and ad-justment

le +100 degCle +212 degF

The solenoid body heats up during operation ndash depending on ambient temperature (max 60degC140degF) and intrinsic heating (approx 40degC104degF)

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 35

In the case of double solenoid valves the position of the con-nection box can only be changed by removing the actuator and reinstalling it offset by 90deg or 180deg

If more than three valVario controls are installed in line the controls must be supported

The seals in some gas compression fittings are approved for temperatures of up to 70degC (158degF) This temperature limit will not be exceeded if the flow through the pipe is at least 1 msup3h (3531 SCFH) of gas and the maximum ambient temperature is 50degC (122degF)

7 1 1 Installation position

pu ge 80 mbar(80 hPa32 WC)

VAD VAG VAH VRH VAV

In humid environments black solenoid actuator in the vertical upright position only

VAD VAG VAH VRH black solenoid actuator in the vertical upright position or tilted up to the horizontal not upside downVAG VAH horizontal position only if pu ge 80 mbar (32 WC))VAV installation in the vertical position only black solenoid actuator in the vertical upright positionTo ensure that the airgas ratio control VAG the flow rate regulator VAH VRH or the variable airgas ratio control VAV can react quickly when the load is changed the impulse line for the air control pressure psa and for VAV the impulse line for the combustion chamber control pressure psc should be kept as short as possible The tube internal diameter for the impulse line must always be ge 39 mm (015)

VAH VRHIt is not permitted to install a gas solenoid valve VAS down-stream of flow rate regulator VAH VRH and upstream of fine-adjusting valve VMV The VAS would no longer be able to perform its function as a second safety valve if installed in the above-mentioned position

M

VMV

VAH

VASVAS

pd-

psa-psa

VMV

VAH pd-

psa-psa

The measuring orifice in the air line for impulse lines psa and psa- must always be installed downstream of the air control valve

Project planning information gt Installation

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 36

VAVThe impulse line for the combustion chamber control pres-sure psc must be fitted so that no condensation can enter the pressure regulator but rather flows back into the combustion chamber

7 2 Setting the low-fire rate on VAG VAH VRH VAV

-10 +05-05

ndash

+1

-15

mbar

+15

06

1 152

3

N V

+ +ndash

+30 -15+15

ndash

-3

+5

mbar

-5

N

+

VAG VAH VRH VAV

If the burner operates at low-fire rate the gasair mixture can be changed using the parallel shift of the characteristic curve by turning the adjusting screw ldquoNrdquoAdjusting range at low fire VAG VAH VRH -5 to +5 mbar (-195 to +195 WC) VAV -15 to +15 mbar (-06 to +06 WC)

7 3 Setting the high-fire rate on VAVTo set the high-fire rate the transmission ratio is changed us-ing the adjusting screw ldquoVrdquo until the required flue gas values are achievedTransmission ratio V = pdpsa = 061 to 31The settings N and V can influence each other and must be repeated if necessary

+N+V

-V

-N

VAV

psa [mbar]

p d [m

bar]

7 3 1 CalculationWith no connection to the combustion chamber control pres-sure psc pd = V times psa + NWith connection to the combustion chamber control pressure psc (pd - psc) = V times (psa - psc) + N

Project planning information

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 37

pu pd

21579

4836

085310

189

142

8 Accessories8 1 Gas pressure switch DG VC for VAx VRHType Adjusting range [mbar]DG 17VC 2 to 17DG 40VC 5 to 40DG 110VC 30 to 110DG 300VC 100 to 300

Scope of delivery 1 times pressure switch for gas 2 times retaining screws 2 times sealing rings

8 2 Gas pressure switch DG VCT for VAx T VRH TType Adjusting range [WC]DG 17VCT 08 to 68DG 40VCT 2 to 16DG 110VCT 12 to 44DG 300VCT 40 to 120

Scope of delivery 1 times gas pressure switch with AWG 18 connection wires 2 times retaining screws 2 times sealing ringsMonitoring the inlet pressure pu the electrical plug of the pressure switch for gas points towards the inlet flangeMonitoring the outlet pressure pd the electrical plug of the pressure switch for gas points towards the outlet flange

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 38

A BC

D

FE

ACD

F

B

E

8 3 Bypass valvepilot gas valve VAS 18 3 1 VAS 1 attached to VADVAGVAHVAV 1Scope of delivery A 1 times bypasspilot gas valve VAS 1 B 4 times O-rings C 4 times double nuts D 4 times connection parts E 1 times mounting aidBypass valve VAS 1 F 2 times connection pipes if the bypass valve has a blind flange

at the outlet sidePilot gas valve VAS 1 F 1 times connection pipe 1 times sealing plug if the pilot gas valve

has a threaded flange at the outlet side

Accessories

8 3 2 VAS 1 attached to VADVAGVAHVAV 2 VADVAGVAHVAV 3Scope of delivery A 1 times bypasspilot gas valve VAS 1 B 4 times O-rings C 4 times spacer sleeves D 4 times connection parts E 1 times mounting aidBypass valve VAS 1 F 2 times connection pipes if the bypass valve has a blind flange

at the outlet sidePilot gas valve VAS 1 F 1 times connection pipe 1 times sealing plug if the pilot gas valve

has a threaded flange at the outlet side

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 39

2

3

456

810

20

30

405060

80100

∆p [m

bar]

005 01 02 03 05 08 1 2 3 4 51

3

2

Qn [m3h]

1

01

02

03

0405

08

003

002

6 8 10

005 01 02 03 05 08 1 2 3 4 5003 6 8 10

20

005 01 02 03 05 08 1 2 3 4 5003 6 8 10 20

30

∆p [i

nch

WC]

1

2

3

456

810

20

30

40

04

004

006

00801

02

03

0506

08

Qn [SCFH]10 40 60 100 200 3001 500 10002 3 4 5

120 306 8

21 3 4 5 6 7 8 910

8 3 3 Flow rate

The characteristic flow rate curves have been measured for bypass valve VAS 1 with connection pipe diameter 1 to 10 mm (004 to 04) and for the pilot gas valve with 10 mm (04) connection pipe

Bypass valve connection pipe diameter [mm]

Pilo

t gas

val

ve 1

0 m

m (0

4)

conn

ectio

n pi

pe d

iam

eter

Accessories gt Bypass valvepilot gas valve VAS 1

= natural gas (ρ = 080 kgm3) = propane (ρ = 201 kgm3) = air (ρ = 129 kgm3)

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 40

Accessories

8 4 Bypass valvepilot gas valve VBY 8 for VADVAGVAHVAV 1

B

C

AVBY 8

VAx 1

55

(217)40(157)

70 (276)

80(315)

Rp frac14(pilot gas valve)

For mounting on VAD VAG VAH VAV 1 and double solenoid valve VCD VCG VCH VCV 1

8 4 1 Scope of delivery VBY 8I as bypass valveA 1 times bypass valve VBY 8IB 2 times retaining screws with 4 times O-rings both retaining screws

have a bypass orificeC 1 times grease for o-rings

8 4 2 Scope of delivery VBY 8R as pilot gas valveA 1 times pilot gas valve VBY 8RB 2 times retaining screws with 5 x O-rings one retaining screw

has a bypass orifice (2 x O-rings) the other does not (3 x O-rings)

C 1 times grease for O-rings

8 4 3 SelectionType I R W Q K 6L -R -L E B D 05

VBY 8

Order exampleVBY 8RW6L-LED

8 4 4 Type codeCode DescriptionVBY Gas solenoid valve8 Nominal sizeIR

For internal gas pick-up as bypass valveFor external gas pick-up as pilot gas valve

KQW

Mains voltage 24 V DC Mains voltage 120 V AC 5060 HzMains voltage 230 V AC 5060 Hz

6L Electrical connection via plug and socket with LED-R-L

Attachment side of main valve right-hand sideAttachment side of main valve left-hand side

EB

Attached to the VAxEnclosed (separate packing unit)

05D

Nozzle diameter = 05 mm (002)Flow adjustment

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 41

2

01

02

03

05

081

3

456

810

20

30

405060

80100

∆p [m

bar]

1

3

201 02 03 05 1 2 3001 003 4

Qn [m3h]

02 03 05 1 2

01 02 05

002 006

002

002 006 1

0010006 005 01

001

0003

0006 2 3

VBY 8DVBY 805

∆p [i

nch

WC]

1

2

3

456

810

20

30

40

040506

08

1

Qn [SCFH]10 40 60 1005 2081 2 30402

01

02

03

004005006

008

Adjusting range

8 4 5 Flow rateVBY 8 D

+

-

The flow rate can be set by turning the flow rate restrictor (4 mm016 Allen screw) frac14 of a turn Flow rate 10 to 100

VBY 8 05The flow is routed through a 05 mm (002) nozzle and thus has a fixed characteristic flow rate curve Adjustment is not possible

8 4 6 Technical dataInlet pressure pu max 500 mbar (7 psig)Ambient temperature 0 to +60degC (32 to 140degF) no condensation permittedStorage temperature 0 to +40degC (32 to 104degF) no condensation permittedPower consumption 24 V = 8 W 120 V = 8 W 230 V = 95 WEnclosure IP 54

Accessories gt Bypass valvepilot gas valve VBY 8 for VADVAGVAHVAV 1

= natural gas (ρ = 080 kgm3) = propane (ρ = 201 kgm3) = air (ρ = 129 kgm3)

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 42

TC 116VB C

56(22)

49(193)

27(106)

A

A

VCx 1 VCx 2VCx 3

8 5 Tightness control TC 116Vfor VAx 1 ndash 3An adapter plate is required to attach the tightness control to the right- or left-hand side of the pressure regulator with gas solenoid valveScope of delivery A 1 times adapter plate B 2 times O-rings C 2 times retaining screwsFor attachment to left-hand side Order No 74922391 right-hand side Order No 74921995

8 6 Pressure test pointsTest points to check the inlet pressure pu and outlet pressure pdScope of delivery 1 x pressure test points with 1 x profiled sealing rings Order No 74923390

8 7 Cable gland setWhen wiring a double solenoid valve with pressure regula-tor VCx the connection boxes are to be connected using a cable gland setThe cable gland set can only be used if the connection boxes are at the same height and on the same side and if both valves are equipped either with or without a proof of closure switchVA 1 Order No 74921985 VA 2 Order No 74921986 VA 3 Order No 74921987

Accessories

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 43

A B

D

C

Accessories

8 9 Differential pressure orifice

Size PipeDN

Differential pressure orifi cewith outlet dia

1 15 17 mm 0671 20 25 mm 0981 25 30 mm 1182 40 46 mm 1813 50 58 mm 228

If pressure regulator VADVAGVAV 1 is retrofitted upstream of gas solenoid valve VAS 1 a DN 25 differential pressure orifice with outlet opening d = 30 mm (118) must be inserted at the outlet of the pressure regulatorIn the case of pressure regulator VAx 115 or VAx 120 the DN 25 differential pressure orifice must be ordered separately and retrofitted Order No 74922240

8 8 Seal set VA 1 ndash 3VA 1 Order No 74921988 VA 2 Order No 74921989 VA 3 Order No 74921990Scope of deliveryA 1 times double block seal B 2 times O-rings (flange) C 2 times O-rings (pressure switch) for pressure test pointscrew plug D 2 times sealing rings (flat sealing) and 2 times profiled sealing rings

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 44

BA

C

pd-

8 11 Attachment blockFor locked installation of pressure gauge and other acces-soriesScope of delivery A 1 times attachment block B 2 times self-tapping screws for installation C 2 times O-rings

Accessories

8 10 Retaining frameIn the event that a pressure regulator VAx is installed at a later point upstream of a gas solenoid valve VAS a measur-ing orifice VMO or a fine-adjusting valve VMV the retaining frame must be fitted at the inlet of the second device in order to fasten the differential pressure orifice at the regulator outlet Order the retaining frame separatelyRetaining frame for Size 1 Order No 74923029 Size 2 Order No 74923030 Size 3 Order No 74923031

8 12 Gas control lineFine-adjusting valve VMV can be installed on the flow rate regulator VAH for fine adjustment of the gas flow rateThe gas control line for gas outlet pressure pd- is available with 2 18 compression fittingsSize 1 Order No 74924458 Size 2 Order No 74924459

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 45

8 13 Measuring orifice VMOThe measuring orifice VMO is designed to reduce the gas and air flow rates and is installed downstream of the valVario control The measuring orifice is available with Rp internal thread (NPT internal thread) or flange to ISO 7005See wwwdocuthekcom Elster Kromschroumlder Krom-schroumlder LBE Products 03 Valves and butterfly valves valVario accessories Type of document Technical Informa-tion VMO

Accessories

8 14 Filter module VMFUsing the filter module VMF the gas flow upstream of the gas solenoid valve VAS and the airgas ratio control is cleaned The filter module is available with Rp internal thread (NPT internal thread) or flange to ISO 7005 and can also be supplied with fitted pressure switch as an optionSee wwwdocuthekcom Elster Kromschroumlder Krom-schroumlder LBE Products 03 Valves and butterfly valves valVario accessories Type of document Technical Informa-tion VMF

8 15 Fine-adjusting valve VMVThe flow rate is set using the fine-adjusting valve VMV The fine-adjusting valve is available with Rp internal thread (NPT internal thread) or flange to ISO 7005See wwwdocuthekcom Elster Kromschroumlder Krom-schroumlder LBE Products 03 Valves and butterfly valves valVario accessories Type of document Technical Infor-mation VMV

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 46

9 Technical dataGas types natural gas LPG (gaseous) biologically produced methane (max 01 -by-vol H2S) or clean air other gases on request The gas must be clean and dry in all temperature conditions and must not contain condensateCE and FM approved UL listed max inlet pressure pu 10 ndash 500 mbar (4 ndash 200 WC) FM approved (230 V AC 120 V AC 24 V DC) non opera-tional pressure 700 mbar (10 psig)ANSICSA approved (230 V AC 120 V AC 24 V DC) up to 350 mbar (5 psig)Opening time of the solenoid valve quick opening le 05 s Closing time quick closing lt 1 sMedium and ambient temperatures -20 to +60degC (-4 to +140degF) no condensation permittedStorage temperature -20 to +40degC (-4 to +104degF)Enclosure IP 65Valve housing aluminium valve seal NBRConnection flanges with internal thread Rp to ISO 7-1 NPT to ANSIASMESafety valve Class A to EN 161 Factory Mutual Research Class 7400 Process Control Valves (230 V AC 120 V AC 24 V DC) ANSI Z2121 and CSA 65 ANSI Z2118 and CSA 63Control class A to EN 88-1Control range up to 101

Mains voltage 230 V AC +10-15 5060 Hz 200 V AC +10-15 5060 Hz 120 V AC +10-15 5060 Hz 100 V AC +10-15 5060 Hz 24 V DC plusmn20Duty cycle 100Power factor of the solenoid coil cos φ = 09Power consumption

Type Voltage Power

VAx 1

24 V DC 25 W ndash100 V AC 25 W (26 VA)120 V AC 25 W (26 VA)200 V AC 25 W (26 VA)230 V AC 25 W (26 VA)

VAx 2 VAx 3

24 V DC 36 W ndash100 V AC 36 W (40 VA)120 V AC 40 W (44 VA)200 V AC 40 W (44 VA)230 V AC 40 W (44 VA)

VBY24 V DC 8 W ndash

120 V AC 8 W ndash230 V AC 95 W ndash

Cable gland M20 times 15Electrical connection cable with max 25 mm2 (AWG 12) or plug with socket to EN 175301-803

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 47

Position indicator contact rating

Type Voltage Min current(resistive load)

Max current(resistive load)

VAxS VCxS 12 ndash 250 V AC 5060 Hz 100 mA 3 AVAxG VCxG 12 ndash 30 V DC 2 mA 01 A

Position indicator switching frequency max 5 times per minute

Switching current [A]

Switching cyclescos φ = 1 cos φ = 06

01 500000 50000005 300000 250000

1 200000 1000003 100000 ndash

Limited to max 200000 cycles for heating systems

9 1 VADOutlet pressure pd VAD-25 25 ndash 25 mbar (1 ndash 10 WC) VAD-50 20 ndash 50 mbar (8 ndash 20 WC) VAD-100 35 ndash 100 mbar (14 ndash 40 WC)Combustion chamber control pressure psc (connection psa)

-20 to +20 mbar (-78 to +78 WC)

VAD

pu

pd

(psa)

9 2 VAGOutlet pressure pd 05 ndash 100 mbar (02 ndash 40 WC)Air control pressure psa 05 ndash 100 mbar (02 ndash 40 WC)

Adjusting range at low fire plusmn5 mbar (plusmn2 WC)Transmission ratio of gas to air 11The inlet pressure must always be higher than the air control pressure psa + pressure loss ∆p + 5 mbar (2 WC)

VAGpd

pu

psa

psa

VAGK 1 x 18 coupling for plastic hose (internal dia 39 mm (015) external dia 61 mm (024)) or VAGE 1 x 18 compression fitting for 6 times 1 tube or VAGA 1 x NPT 18 adapter or VAGN zero governor with breathing orifice

9 3 VAH VRHAir control pressure psa 06 ndash 100 mbar (024 ndash 40 WC) Differential air pressure ∆psa (psa - psa-) 06 ndash 50 mbar (024 ndash 197 WC) Differential gas pressure ∆pd (pd - pd-) 06 ndash 50 mbar (024 ndash 197 WC)Transmission ratio of gas to air 11The inlet pressure must always be higher than the differen-tial air pressure ∆psa + pressure loss ∆p + max gas pres-sure on burner + 5 mbar (2 WC)Adjusting range at low fire plusmn5 mbar (plusmn2 WC)

Technical data

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 48

VAHVRH

pd-

pu

psa-

psa

Connection of the air control pressure psaVAHE VRHE 3 x 18 compression fitting for 6 times 1 tube or VAHA VRHA 3 x NPT 18 adapter

9 4 VAVOutlet pressure pd 05 ndash 30 mbar (02 ndash 117 WC)Air control pressure psa 04 ndash 30 mbar (015 ndash 117 WC)Combustion chamber control pressure psc

-20 to +20 mbar (-78 to +78 WC)Min control pressure differential psa - psc 04 mbar (015 WC)Min pressure differential pd - psc 05 mbar (02 WC)Adjusting range at low fire plusmn15 mbar (plusmn06 WC)Transmission ratio of gas to air 061 to 31The inlet pressure pu must always be higher than the air control pressure psa times transmission ratio V + pressure loss ∆p + 15 mbar (06 WC)

pu

pd psapsc

VAV

VAVK 2 x plastic hose couplings (internal dia 39 mm (015) external dia 61 mm (024)) or VAVE 2 x 18 compression fitting for 6 times 1 tube or VAVA 2 x NPT 18 adapter

Technical data

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 49

9 5 Safety-specific characteristic values for VAx 1 ndash 3For SILSuitable for Safety Integrity Level SIL 1 2 3

Diagnostic coverage DC 0

Type of subsystem Type A to EN 61508-2 74312

Operating mode High demand mode pursu-ant to EN 61508-4 3512

For PLSuitable for Performance Level PL a b c d e

Category B 1 2 3 4Common cause failure CCF gt 65Application of essential safety requirements Satisfied

Application of tried-and-tested safety requirements Satisfied

For SIL and PL

B10d value

Operating cyclesVAD VAG VAV VAH 1 10094360VAD VAG VAV VAH 2 8229021VAD VAG VAV VAH 3 6363683

Hardware fault tolerance (1 valve) HFT 0

Hardware fault tolerance (2 valves) HFT 1

Safe failure fraction SFF gt 90Fraction of undetected com-mon cause failures β ge 2

Max service life under operating conditions10 years after date of production plus max 12 year in stor-age prior to first use or once the given number of operating cycles has been reached depending on which is achieved firstThe devices are suitable for single-channel systems (HFT = 0) up to SIL 2PL d and up to SIL 3PL e when two re-dundant valves are installed in a double-channel architecture (HFT = 1) provided that the complete system complies with the requirements of EN 61508ISO 13849

For a glossary of terms see page 53 (Glossary)

Technical data

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 50

nop 1hnop 1a

sB10d

T10d aPFHD (1 VAx) 1h

PFHD (2 VAx) 1h

PFDavg (1 VAx)

PFDavg (2 VAx)

Technical data gt Safety-specific characteristic values for VAx 1 ndash 3

9 5 1 Determining the PFHD value the λD value and the MTTFd value

PFHD = λD = x nop= 1MTTFd

01B10d

PFDavg = x λD x 24 x 365 x T10d 12

Type

Cycle time

suitable for

suitable for

PFHD = Probability of dangerous failure (HDM = high de-mand mode) [1hour]PFDavg = Average probability of dangerous failure on de-mand (LDM = low demand mode)λD = Mean dangerous failure rate [1hour]MTTFd = Mean time to dangerous failure [hours]nop = Demand rate (mean number of annual operations) [1hour]

9 5 2 Calculating the PFHD and PFDavg

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 51

VAD VAG VAH VAV

H1

Rp frac14(NPT frac14)

H2

E

LF

F

H4

H3

B

VAxS VAxF

L2G

G

Technical data

9 6 Dimensions

Type

Connec-tion Dimensions

WeightRpNPT DN

L L2 E F G H1 H2 H3 H4 Bmm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch kg lbs

VAx 115 12 15 75 29 ndash ndash 75 29 15 06 ndash ndash 143 56 82 32 161 63 117 46 97 38 18 40VAH 115 12 15 75 29 ndash ndash 75 29 15 06 ndash ndash 143 56 100 39 161 63 135 53 97 38 2 44VAx 120 34 20 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 82 33 161 63 117 46 97 38 19 42VAH 120 34 20 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 100 39 161 63 135 53 97 38 21 46VAx 125 1 25 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 82 33 161 63 117 46 97 38 19 42VAH 125 1 25 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 100 39 161 63 135 53 97 38 21 46VAx 240 112 40 128 50 200 79 85 33 29 11 66 26 170 67 112 44 191 75 162 64 125 49 44 97VAH 240 112 40 128 50 200 79 85 33 29 11 66 26 170 67 132 52 191 75 182 72 125 49 47 104VAx 350 2 50 155 61 230 91 85 33 36 14 74 29 180 70 135 53 201 79 196 77 160 63 61 134VAH 350 2 50 155 61 230 91 85 33 36 14 74 29 180 70 156 61 201 79 217 85 160 63 64 141

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 52

10 Converting unitssee wwwadlatusorg

11 Maintenance cyclesAt least once per annum at least twice per annum for biologi-cally produced methaneIf the flow rate drops clean the strainer

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 53

12 Glossary12 1 Diagnostic coverage DCMeasure of the effectiveness of diagnostics which may be determined as the ratio between the failure rate of detected dangerous failures and the failure rate of total dangerous failuresNOTE Diagnostic coverage can exist for the whole or parts of a safety-related system For example diagnostic cover-age could exist for sensors andor logic system andor final elements Unit see EN ISO 13849-12008

12 2 Mode of operationHigh demand mode or continuous modeOperating mode where the frequency of demands for opera-tion made on a safety-related system is greater than one per year or greater than twice the proof-test frequencysee EN 61508-42008

12 3 CategoryClassification of the safety-related parts of a control system in respect of their resistance to faults and their subsequent behaviour in the fault condition and which is achieved by the structural arrangement of the parts fault detection andor by their reliability see EN ISO 13849-12008

12 4 Common cause failure CCFFailures of different items resulting from a single event where these failures are not consequences of each othersee EN ISO 13849-12008

12 5 Fraction of undetected common cause failures β Fraction of undetected failures of redundant components due to a single event whereby these failures are not based on mutual causesNOTE β is expressed as a fraction in the equations and as a percentage elsewheresee EN 61508-62010

12 6 B10d valueMean number of cycles until 10 of the components fail dan-gerouslysee EN ISO 13849-12008

12 7 T10d valueMean time until 10 of the components fail dangerouslysee EN ISO 13849-12008

12 8 Hardware fault tolerance HFTA hardware fault tolerance of N means that N + 1 is the mini-mum number of faults that could cause a loss of the safety functionsee IEC 61508-22010

12 9 Mean dangerous failure rate λD Mean rate of dangerous failures during operation time (T10d) Unit 1hsee EN ISO 13849-12008

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 54

12 10 Safe failure fraction SFFFraction of safe failures related to all failures which are as-sumed to appearsee EN 13611A22011

12 11 Probability of dangerous failure PFHD Value describing the likelihood of dangerous failure per hour of a component for high demand mode or continuous mode Unit 1hsee EN 13611A22011

12 12 Mean time to dangerous failure MTTFd Expectation of the mean time to dangerous failuresee EN ISO 13849-12008

12 13 Demand rate nop Mean number of annual operationssee EN ISO 13849-12008

12 14 Average probability of dangerous failure on demand PFDavg (LDM = 1 ndash 10 switching cyclesyear)Average probability of a dangerous failure of the safety function on demand (LDM = low demand mode)see EN 61508-6

Glossary

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415

Finally we are offering you the opportunity to assess this ldquoTechnical Information (TI)rdquo and to give us your opinion so that we can improve our documents further and suit them to your needs

ClarityFound information quicklySearched for a long timeDidnrsquot find informationWhat is missing

ComprehensionCoherentToo complicatedNo answer

ScopeToo littleSufficientToo wideNo answer

No answer

NavigationI can find my way aroundI got ldquolostrdquoNo answer

UseTo get to know the productTo choose a productPlanningTo look for information

My scope of functionsTechnical departmentSalesNo answer

Remarks

(Adobe Reader 7 or higher required) wwwadobecom

Elster GmbH Postfach 2809 middot 49018 Osnabruumlck Strotheweg 1 middot 49504 Lotte (Buumlren) GermanyT +49 541 1214-0 F +49 541 1214-370 infokromschroedercomwwwkromschroedercom

The current addresses of our international agents are available on the Internetwwwkromschroederdeindexphpid=718ampL=1

We reserve the right to make technical modifications in the interests of progressCopyright copy 2015 Elster GmbH All rights reserved

Contact

Feedback

0325

0530

  • Pressure regulators with solenoid valve VAD VAG VAV VAH
  • Flow rate regulator VRH
  • Pressure regulators with double solenoid valve VCD VCG VCV VCH
  • Contents
  • 1 Application
    • 11 Examples of application
      • 111 Constant pressure control
      • 112 Constant pressure control with two gas solenoid valves
      • 113 Constant pressure control with max pressure switch
      • 114 Constant pressure control with non-controlled pilot gas outlet
      • 115 Modulating control
      • 116 Modulating control with two gas solenoid valves
      • 117 Modulating control with two gas solenoid valves and inlet pressure switch
      • 118 HighLow control
      • 119 Zero pressure control
      • 1110 Staged flow rate control
      • 1111 Continuous or staged flow rate control
      • 1112 Modulating control with variable airgas ratio control with gas solenoid valve
      • 1113 Modulating control in residential heat generation
          • 2 Certification
          • 3 Function
            • 31 VAD VAG VAH VRH VAV
              • 311 Pressure regulator for gas VAD
              • 312 Airgas ratio control VAG
              • 313 Flow rate regulators VAH VRH
              • 314 Variable airgas ratio control VAV
              • 315 Pressure regulator with gas solenoid valve VAxS position indicator with visual indicator
                • 32 Animation
                • 33 Connection diagram
                  • 331 VAx with M20 cable gland
                  • 332 VAx with plug
                  • 333 VAS with VADVAGVAHVAV with M20 cable gland
                  • 334 VAS with VADVAGVAHVAV with plug
                      • 4 Replacement possibilities for MODULINE pressure regulators with gas solenoid valve
                        • 41 GVS GVI GVIB GVR and GVRH are to be replaced by VAD VAG VAG+VAS VAH and VAV
                          • 5 Flow rate
                            • 51 Selection example for VAD
                              • 511 Calculate VAD
                                • 52 Selection example for VAG VAH VRH VAV
                                  • 521 CalculateVAG VxHVAV
                                    • 53 Selection example for zero governor VAGN
                                      • 531 Calculate VAGN
                                          • 6 Selection
                                            • 61 Selection table for pressure regulator with solenoid valve VAD
                                            • 62 Type code for VAD
                                            • 63 Selection table for airgas ratio control with solenoid valve VAG flow rate regulators VAH VRH
                                            • 64 Type code for VAG VAH VRH
                                            • 65 Selection table for variable airgas ratio control with solenoid valve VAV
                                            • 66 Type code for VAV
                                            • 67 Accessories
                                              • 7 Project planning information
                                                • 71 Installation
                                                  • 711 Installation position
                                                    • 72 Setting the low-fire rate on VAG VAH VRH VAV
                                                    • 73 Setting the high-fire rate on VAV
                                                      • 731 Calculation
                                                          • 8 Accessories
                                                            • 81 Gas pressure switch DGVC for VAx VRH
                                                            • 82 Gas pressure switch DGVCT for VAxT VRHT
                                                            • 83 Bypass valvepilot gas valve VAS 1
                                                              • 831 VAS 1 attached to VADVAGVAHVAV 1
                                                              • 832 VAS 1 attached to VADVAGVAHVAV 2 VADVAGVAHVAV 3
                                                              • 833 Flow rate
                                                                • 84 Bypass valvepilot gas valve VBY 8 for VADVAGVAHVAV 1
                                                                  • 841 Scope of delivery VBY 8I as bypass valve
                                                                  • 842 Scope of delivery VBY 8R as pilot gas valve
                                                                  • 843 Selection
                                                                  • 844 Type code
                                                                  • 845 Flow rate
                                                                  • 846 Technical data
                                                                    • 85 Tightness control TC 116V
                                                                    • 86 Pressure test points
                                                                    • 87 Cable gland set
                                                                    • 88 Seal set VA 1thinspndashthinsp3
                                                                    • 89 Differential pressure orifice
                                                                    • 810 Retaining frame
                                                                    • 811 Attachment block
                                                                    • 812 Gas control line
                                                                    • 813 Measuring orifice VMO
                                                                    • 814 Filter module VMF
                                                                    • 815 Fine-adjusting valve VMV
                                                                      • 9 Technical data
                                                                        • 91 VAD
                                                                        • 92 VAG
                                                                        • 93 VAH VRH
                                                                        • 94 VAV
                                                                        • 95 Safety-specific characteristic values for VAx 1thinspndashthinsp3
                                                                          • 951 Determining the PFHD value the λD value and the MTTFd value
                                                                          • 952 Calculating the PFHD and PFDavg
                                                                            • 96 Dimensions
                                                                              • 10 Converting units
                                                                              • 11 Maintenance cycles
                                                                              • 12 Glossary
                                                                                • 121 Diagnostic coverage DC
                                                                                • 122 Mode of operation
                                                                                • 123 Category
                                                                                • 124 Common cause failure CCF
                                                                                • 125 Fraction of undetected common cause failures β
                                                                                • 126 B10d value
                                                                                • 127 T10d value
                                                                                • 128 Hardware fault tolerance HFT
                                                                                • 129 Mean dangerous failure rate λD
                                                                                • 1210 Safe failure fraction SFF
                                                                                • 1211 Probability of dangerous failure PFHD
                                                                                • 1212 Mean time to dangerous failure MTTFd
                                                                                • 1213 Demand rate nop
                                                                                • 1214 Average probability of dangerous failure on demand PFDavg
                                                                                  • Feedback
                                                                                  • Contact
                                                                                      1. naechste_Seite 24
                                                                                      2. naechste Seite 18
                                                                                      3. naechste Seite 6
                                                                                      4. naechste Seite 16
                                                                                      5. naechste Seite 14
                                                                                      6. naechste Seite 25
                                                                                      7. naechste_Seite 11
                                                                                      8. naechste_Seite 17
                                                                                      9. fbArbeitspunkt_Min Ja
                                                                                      10. fbArbeitspunkt Ja
                                                                                      11. ftProgramm Standard-Programm
                                                                                      12. fz_kv
                                                                                      13. fz_pe 80
                                                                                      14. fz_pG 60
                                                                                      15. fzDelta_p_Soll 20
                                                                                      16. ftEinheit_Druck mbar
                                                                                      17. fatTyp [115]
                                                                                      18. fbArbeitspunkt_Min_2 Ja
                                                                                      19. fbArbeitspunkt_2 Ja
                                                                                      20. ftRegler_Typ VAG
                                                                                      21. ftProgramm_2 Standard-Programm
                                                                                      22. fz_kv_2
                                                                                      23. fatMedium [08]
                                                                                      24. fzDichte 08
                                                                                      25. ftEinheit_Dichte kgm3
                                                                                      26. fzV_Norm 30
                                                                                      27. ftEinheit_Volstrom m3h
                                                                                      28. fz_pe_2 80
                                                                                      29. fz_pG_2 60
                                                                                      30. fzDelta_p_Soll_2 20
                                                                                      31. ftEinheit_Druck2 [mbar]
                                                                                      32. ftEinheit_Geschw [ms]
                                                                                      33. fatTyp_2 [10954451150103322]
                                                                                      34. fbArbeitspunkt_Min_3 Ja
                                                                                      35. fbArbeitspunkt_3 Ja
                                                                                      36. ftProgramm_3 Standard-Programm
                                                                                      37. fz_kv_3
                                                                                      38. fz_pe_3 20
                                                                                      39. fz_pG_3 0
                                                                                      40. fzDelta_p_Soll_3 20
                                                                                      41. fatTyp_3 [123]
                                                                                      42. fatSchaltleistung [6363683]
                                                                                      43. fz_nop_Stunde 1
                                                                                      44. fz_nop_Jahr 8760
                                                                                      45. fzZyklus 3600
                                                                                      46. fzB10d 6363683
                                                                                      47. fzT10d 10
                                                                                      48. fzPFHd_1V 15714170551864384e-8
                                                                                      49. fzPFDavg_1V
                                                                                      50. ftGeeignet_1V PL d SIL 2
                                                                                      51. fzPFHd_2V 33505832253532625e-10
                                                                                      52. fzPFDavg_2V
                                                                                      53. ftGeeignet_2V PL e SIL 3
                                                                                      54. ftUebersicht Off
                                                                                      55. ftVerstaendlichkeit Off
                                                                                      56. ftFehlende_Info
                                                                                      57. ftUmfang Off
                                                                                      58. ftVerwendung_1 Off
                                                                                      59. ftVerwendung_2 Off
                                                                                      60. ftVerwendung_3 Off
                                                                                      61. ftVerwendung_4 Off
                                                                                      62. ftNavigation Off
                                                                                      63. ftTaetigkeitsbereich Off
                                                                                      64. ftBemerkung
                                                                                      65. Michael Rehkamp Elster Kromschroumlder>btnSenden
Page 35: VAD, VAG, VAV, VAH, VRH, VCD, VCG, VCV, VCH · PDF fileVAD, VAG, VAH, VAV, VRH, VCD, VCG, VCV, VCH · Edition 04.15 6 VAD VAD VAS 1 .1 Examples of application 1 .1 .1 Constant pressure

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 35

In the case of double solenoid valves the position of the con-nection box can only be changed by removing the actuator and reinstalling it offset by 90deg or 180deg

If more than three valVario controls are installed in line the controls must be supported

The seals in some gas compression fittings are approved for temperatures of up to 70degC (158degF) This temperature limit will not be exceeded if the flow through the pipe is at least 1 msup3h (3531 SCFH) of gas and the maximum ambient temperature is 50degC (122degF)

7 1 1 Installation position

pu ge 80 mbar(80 hPa32 WC)

VAD VAG VAH VRH VAV

In humid environments black solenoid actuator in the vertical upright position only

VAD VAG VAH VRH black solenoid actuator in the vertical upright position or tilted up to the horizontal not upside downVAG VAH horizontal position only if pu ge 80 mbar (32 WC))VAV installation in the vertical position only black solenoid actuator in the vertical upright positionTo ensure that the airgas ratio control VAG the flow rate regulator VAH VRH or the variable airgas ratio control VAV can react quickly when the load is changed the impulse line for the air control pressure psa and for VAV the impulse line for the combustion chamber control pressure psc should be kept as short as possible The tube internal diameter for the impulse line must always be ge 39 mm (015)

VAH VRHIt is not permitted to install a gas solenoid valve VAS down-stream of flow rate regulator VAH VRH and upstream of fine-adjusting valve VMV The VAS would no longer be able to perform its function as a second safety valve if installed in the above-mentioned position

M

VMV

VAH

VASVAS

pd-

psa-psa

VMV

VAH pd-

psa-psa

The measuring orifice in the air line for impulse lines psa and psa- must always be installed downstream of the air control valve

Project planning information gt Installation

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 36

VAVThe impulse line for the combustion chamber control pres-sure psc must be fitted so that no condensation can enter the pressure regulator but rather flows back into the combustion chamber

7 2 Setting the low-fire rate on VAG VAH VRH VAV

-10 +05-05

ndash

+1

-15

mbar

+15

06

1 152

3

N V

+ +ndash

+30 -15+15

ndash

-3

+5

mbar

-5

N

+

VAG VAH VRH VAV

If the burner operates at low-fire rate the gasair mixture can be changed using the parallel shift of the characteristic curve by turning the adjusting screw ldquoNrdquoAdjusting range at low fire VAG VAH VRH -5 to +5 mbar (-195 to +195 WC) VAV -15 to +15 mbar (-06 to +06 WC)

7 3 Setting the high-fire rate on VAVTo set the high-fire rate the transmission ratio is changed us-ing the adjusting screw ldquoVrdquo until the required flue gas values are achievedTransmission ratio V = pdpsa = 061 to 31The settings N and V can influence each other and must be repeated if necessary

+N+V

-V

-N

VAV

psa [mbar]

p d [m

bar]

7 3 1 CalculationWith no connection to the combustion chamber control pres-sure psc pd = V times psa + NWith connection to the combustion chamber control pressure psc (pd - psc) = V times (psa - psc) + N

Project planning information

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 37

pu pd

21579

4836

085310

189

142

8 Accessories8 1 Gas pressure switch DG VC for VAx VRHType Adjusting range [mbar]DG 17VC 2 to 17DG 40VC 5 to 40DG 110VC 30 to 110DG 300VC 100 to 300

Scope of delivery 1 times pressure switch for gas 2 times retaining screws 2 times sealing rings

8 2 Gas pressure switch DG VCT for VAx T VRH TType Adjusting range [WC]DG 17VCT 08 to 68DG 40VCT 2 to 16DG 110VCT 12 to 44DG 300VCT 40 to 120

Scope of delivery 1 times gas pressure switch with AWG 18 connection wires 2 times retaining screws 2 times sealing ringsMonitoring the inlet pressure pu the electrical plug of the pressure switch for gas points towards the inlet flangeMonitoring the outlet pressure pd the electrical plug of the pressure switch for gas points towards the outlet flange

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 38

A BC

D

FE

ACD

F

B

E

8 3 Bypass valvepilot gas valve VAS 18 3 1 VAS 1 attached to VADVAGVAHVAV 1Scope of delivery A 1 times bypasspilot gas valve VAS 1 B 4 times O-rings C 4 times double nuts D 4 times connection parts E 1 times mounting aidBypass valve VAS 1 F 2 times connection pipes if the bypass valve has a blind flange

at the outlet sidePilot gas valve VAS 1 F 1 times connection pipe 1 times sealing plug if the pilot gas valve

has a threaded flange at the outlet side

Accessories

8 3 2 VAS 1 attached to VADVAGVAHVAV 2 VADVAGVAHVAV 3Scope of delivery A 1 times bypasspilot gas valve VAS 1 B 4 times O-rings C 4 times spacer sleeves D 4 times connection parts E 1 times mounting aidBypass valve VAS 1 F 2 times connection pipes if the bypass valve has a blind flange

at the outlet sidePilot gas valve VAS 1 F 1 times connection pipe 1 times sealing plug if the pilot gas valve

has a threaded flange at the outlet side

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 39

2

3

456

810

20

30

405060

80100

∆p [m

bar]

005 01 02 03 05 08 1 2 3 4 51

3

2

Qn [m3h]

1

01

02

03

0405

08

003

002

6 8 10

005 01 02 03 05 08 1 2 3 4 5003 6 8 10

20

005 01 02 03 05 08 1 2 3 4 5003 6 8 10 20

30

∆p [i

nch

WC]

1

2

3

456

810

20

30

40

04

004

006

00801

02

03

0506

08

Qn [SCFH]10 40 60 100 200 3001 500 10002 3 4 5

120 306 8

21 3 4 5 6 7 8 910

8 3 3 Flow rate

The characteristic flow rate curves have been measured for bypass valve VAS 1 with connection pipe diameter 1 to 10 mm (004 to 04) and for the pilot gas valve with 10 mm (04) connection pipe

Bypass valve connection pipe diameter [mm]

Pilo

t gas

val

ve 1

0 m

m (0

4)

conn

ectio

n pi

pe d

iam

eter

Accessories gt Bypass valvepilot gas valve VAS 1

= natural gas (ρ = 080 kgm3) = propane (ρ = 201 kgm3) = air (ρ = 129 kgm3)

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 40

Accessories

8 4 Bypass valvepilot gas valve VBY 8 for VADVAGVAHVAV 1

B

C

AVBY 8

VAx 1

55

(217)40(157)

70 (276)

80(315)

Rp frac14(pilot gas valve)

For mounting on VAD VAG VAH VAV 1 and double solenoid valve VCD VCG VCH VCV 1

8 4 1 Scope of delivery VBY 8I as bypass valveA 1 times bypass valve VBY 8IB 2 times retaining screws with 4 times O-rings both retaining screws

have a bypass orificeC 1 times grease for o-rings

8 4 2 Scope of delivery VBY 8R as pilot gas valveA 1 times pilot gas valve VBY 8RB 2 times retaining screws with 5 x O-rings one retaining screw

has a bypass orifice (2 x O-rings) the other does not (3 x O-rings)

C 1 times grease for O-rings

8 4 3 SelectionType I R W Q K 6L -R -L E B D 05

VBY 8

Order exampleVBY 8RW6L-LED

8 4 4 Type codeCode DescriptionVBY Gas solenoid valve8 Nominal sizeIR

For internal gas pick-up as bypass valveFor external gas pick-up as pilot gas valve

KQW

Mains voltage 24 V DC Mains voltage 120 V AC 5060 HzMains voltage 230 V AC 5060 Hz

6L Electrical connection via plug and socket with LED-R-L

Attachment side of main valve right-hand sideAttachment side of main valve left-hand side

EB

Attached to the VAxEnclosed (separate packing unit)

05D

Nozzle diameter = 05 mm (002)Flow adjustment

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 41

2

01

02

03

05

081

3

456

810

20

30

405060

80100

∆p [m

bar]

1

3

201 02 03 05 1 2 3001 003 4

Qn [m3h]

02 03 05 1 2

01 02 05

002 006

002

002 006 1

0010006 005 01

001

0003

0006 2 3

VBY 8DVBY 805

∆p [i

nch

WC]

1

2

3

456

810

20

30

40

040506

08

1

Qn [SCFH]10 40 60 1005 2081 2 30402

01

02

03

004005006

008

Adjusting range

8 4 5 Flow rateVBY 8 D

+

-

The flow rate can be set by turning the flow rate restrictor (4 mm016 Allen screw) frac14 of a turn Flow rate 10 to 100

VBY 8 05The flow is routed through a 05 mm (002) nozzle and thus has a fixed characteristic flow rate curve Adjustment is not possible

8 4 6 Technical dataInlet pressure pu max 500 mbar (7 psig)Ambient temperature 0 to +60degC (32 to 140degF) no condensation permittedStorage temperature 0 to +40degC (32 to 104degF) no condensation permittedPower consumption 24 V = 8 W 120 V = 8 W 230 V = 95 WEnclosure IP 54

Accessories gt Bypass valvepilot gas valve VBY 8 for VADVAGVAHVAV 1

= natural gas (ρ = 080 kgm3) = propane (ρ = 201 kgm3) = air (ρ = 129 kgm3)

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 42

TC 116VB C

56(22)

49(193)

27(106)

A

A

VCx 1 VCx 2VCx 3

8 5 Tightness control TC 116Vfor VAx 1 ndash 3An adapter plate is required to attach the tightness control to the right- or left-hand side of the pressure regulator with gas solenoid valveScope of delivery A 1 times adapter plate B 2 times O-rings C 2 times retaining screwsFor attachment to left-hand side Order No 74922391 right-hand side Order No 74921995

8 6 Pressure test pointsTest points to check the inlet pressure pu and outlet pressure pdScope of delivery 1 x pressure test points with 1 x profiled sealing rings Order No 74923390

8 7 Cable gland setWhen wiring a double solenoid valve with pressure regula-tor VCx the connection boxes are to be connected using a cable gland setThe cable gland set can only be used if the connection boxes are at the same height and on the same side and if both valves are equipped either with or without a proof of closure switchVA 1 Order No 74921985 VA 2 Order No 74921986 VA 3 Order No 74921987

Accessories

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 43

A B

D

C

Accessories

8 9 Differential pressure orifice

Size PipeDN

Differential pressure orifi cewith outlet dia

1 15 17 mm 0671 20 25 mm 0981 25 30 mm 1182 40 46 mm 1813 50 58 mm 228

If pressure regulator VADVAGVAV 1 is retrofitted upstream of gas solenoid valve VAS 1 a DN 25 differential pressure orifice with outlet opening d = 30 mm (118) must be inserted at the outlet of the pressure regulatorIn the case of pressure regulator VAx 115 or VAx 120 the DN 25 differential pressure orifice must be ordered separately and retrofitted Order No 74922240

8 8 Seal set VA 1 ndash 3VA 1 Order No 74921988 VA 2 Order No 74921989 VA 3 Order No 74921990Scope of deliveryA 1 times double block seal B 2 times O-rings (flange) C 2 times O-rings (pressure switch) for pressure test pointscrew plug D 2 times sealing rings (flat sealing) and 2 times profiled sealing rings

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 44

BA

C

pd-

8 11 Attachment blockFor locked installation of pressure gauge and other acces-soriesScope of delivery A 1 times attachment block B 2 times self-tapping screws for installation C 2 times O-rings

Accessories

8 10 Retaining frameIn the event that a pressure regulator VAx is installed at a later point upstream of a gas solenoid valve VAS a measur-ing orifice VMO or a fine-adjusting valve VMV the retaining frame must be fitted at the inlet of the second device in order to fasten the differential pressure orifice at the regulator outlet Order the retaining frame separatelyRetaining frame for Size 1 Order No 74923029 Size 2 Order No 74923030 Size 3 Order No 74923031

8 12 Gas control lineFine-adjusting valve VMV can be installed on the flow rate regulator VAH for fine adjustment of the gas flow rateThe gas control line for gas outlet pressure pd- is available with 2 18 compression fittingsSize 1 Order No 74924458 Size 2 Order No 74924459

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 45

8 13 Measuring orifice VMOThe measuring orifice VMO is designed to reduce the gas and air flow rates and is installed downstream of the valVario control The measuring orifice is available with Rp internal thread (NPT internal thread) or flange to ISO 7005See wwwdocuthekcom Elster Kromschroumlder Krom-schroumlder LBE Products 03 Valves and butterfly valves valVario accessories Type of document Technical Informa-tion VMO

Accessories

8 14 Filter module VMFUsing the filter module VMF the gas flow upstream of the gas solenoid valve VAS and the airgas ratio control is cleaned The filter module is available with Rp internal thread (NPT internal thread) or flange to ISO 7005 and can also be supplied with fitted pressure switch as an optionSee wwwdocuthekcom Elster Kromschroumlder Krom-schroumlder LBE Products 03 Valves and butterfly valves valVario accessories Type of document Technical Informa-tion VMF

8 15 Fine-adjusting valve VMVThe flow rate is set using the fine-adjusting valve VMV The fine-adjusting valve is available with Rp internal thread (NPT internal thread) or flange to ISO 7005See wwwdocuthekcom Elster Kromschroumlder Krom-schroumlder LBE Products 03 Valves and butterfly valves valVario accessories Type of document Technical Infor-mation VMV

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 46

9 Technical dataGas types natural gas LPG (gaseous) biologically produced methane (max 01 -by-vol H2S) or clean air other gases on request The gas must be clean and dry in all temperature conditions and must not contain condensateCE and FM approved UL listed max inlet pressure pu 10 ndash 500 mbar (4 ndash 200 WC) FM approved (230 V AC 120 V AC 24 V DC) non opera-tional pressure 700 mbar (10 psig)ANSICSA approved (230 V AC 120 V AC 24 V DC) up to 350 mbar (5 psig)Opening time of the solenoid valve quick opening le 05 s Closing time quick closing lt 1 sMedium and ambient temperatures -20 to +60degC (-4 to +140degF) no condensation permittedStorage temperature -20 to +40degC (-4 to +104degF)Enclosure IP 65Valve housing aluminium valve seal NBRConnection flanges with internal thread Rp to ISO 7-1 NPT to ANSIASMESafety valve Class A to EN 161 Factory Mutual Research Class 7400 Process Control Valves (230 V AC 120 V AC 24 V DC) ANSI Z2121 and CSA 65 ANSI Z2118 and CSA 63Control class A to EN 88-1Control range up to 101

Mains voltage 230 V AC +10-15 5060 Hz 200 V AC +10-15 5060 Hz 120 V AC +10-15 5060 Hz 100 V AC +10-15 5060 Hz 24 V DC plusmn20Duty cycle 100Power factor of the solenoid coil cos φ = 09Power consumption

Type Voltage Power

VAx 1

24 V DC 25 W ndash100 V AC 25 W (26 VA)120 V AC 25 W (26 VA)200 V AC 25 W (26 VA)230 V AC 25 W (26 VA)

VAx 2 VAx 3

24 V DC 36 W ndash100 V AC 36 W (40 VA)120 V AC 40 W (44 VA)200 V AC 40 W (44 VA)230 V AC 40 W (44 VA)

VBY24 V DC 8 W ndash

120 V AC 8 W ndash230 V AC 95 W ndash

Cable gland M20 times 15Electrical connection cable with max 25 mm2 (AWG 12) or plug with socket to EN 175301-803

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 47

Position indicator contact rating

Type Voltage Min current(resistive load)

Max current(resistive load)

VAxS VCxS 12 ndash 250 V AC 5060 Hz 100 mA 3 AVAxG VCxG 12 ndash 30 V DC 2 mA 01 A

Position indicator switching frequency max 5 times per minute

Switching current [A]

Switching cyclescos φ = 1 cos φ = 06

01 500000 50000005 300000 250000

1 200000 1000003 100000 ndash

Limited to max 200000 cycles for heating systems

9 1 VADOutlet pressure pd VAD-25 25 ndash 25 mbar (1 ndash 10 WC) VAD-50 20 ndash 50 mbar (8 ndash 20 WC) VAD-100 35 ndash 100 mbar (14 ndash 40 WC)Combustion chamber control pressure psc (connection psa)

-20 to +20 mbar (-78 to +78 WC)

VAD

pu

pd

(psa)

9 2 VAGOutlet pressure pd 05 ndash 100 mbar (02 ndash 40 WC)Air control pressure psa 05 ndash 100 mbar (02 ndash 40 WC)

Adjusting range at low fire plusmn5 mbar (plusmn2 WC)Transmission ratio of gas to air 11The inlet pressure must always be higher than the air control pressure psa + pressure loss ∆p + 5 mbar (2 WC)

VAGpd

pu

psa

psa

VAGK 1 x 18 coupling for plastic hose (internal dia 39 mm (015) external dia 61 mm (024)) or VAGE 1 x 18 compression fitting for 6 times 1 tube or VAGA 1 x NPT 18 adapter or VAGN zero governor with breathing orifice

9 3 VAH VRHAir control pressure psa 06 ndash 100 mbar (024 ndash 40 WC) Differential air pressure ∆psa (psa - psa-) 06 ndash 50 mbar (024 ndash 197 WC) Differential gas pressure ∆pd (pd - pd-) 06 ndash 50 mbar (024 ndash 197 WC)Transmission ratio of gas to air 11The inlet pressure must always be higher than the differen-tial air pressure ∆psa + pressure loss ∆p + max gas pres-sure on burner + 5 mbar (2 WC)Adjusting range at low fire plusmn5 mbar (plusmn2 WC)

Technical data

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 48

VAHVRH

pd-

pu

psa-

psa

Connection of the air control pressure psaVAHE VRHE 3 x 18 compression fitting for 6 times 1 tube or VAHA VRHA 3 x NPT 18 adapter

9 4 VAVOutlet pressure pd 05 ndash 30 mbar (02 ndash 117 WC)Air control pressure psa 04 ndash 30 mbar (015 ndash 117 WC)Combustion chamber control pressure psc

-20 to +20 mbar (-78 to +78 WC)Min control pressure differential psa - psc 04 mbar (015 WC)Min pressure differential pd - psc 05 mbar (02 WC)Adjusting range at low fire plusmn15 mbar (plusmn06 WC)Transmission ratio of gas to air 061 to 31The inlet pressure pu must always be higher than the air control pressure psa times transmission ratio V + pressure loss ∆p + 15 mbar (06 WC)

pu

pd psapsc

VAV

VAVK 2 x plastic hose couplings (internal dia 39 mm (015) external dia 61 mm (024)) or VAVE 2 x 18 compression fitting for 6 times 1 tube or VAVA 2 x NPT 18 adapter

Technical data

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 49

9 5 Safety-specific characteristic values for VAx 1 ndash 3For SILSuitable for Safety Integrity Level SIL 1 2 3

Diagnostic coverage DC 0

Type of subsystem Type A to EN 61508-2 74312

Operating mode High demand mode pursu-ant to EN 61508-4 3512

For PLSuitable for Performance Level PL a b c d e

Category B 1 2 3 4Common cause failure CCF gt 65Application of essential safety requirements Satisfied

Application of tried-and-tested safety requirements Satisfied

For SIL and PL

B10d value

Operating cyclesVAD VAG VAV VAH 1 10094360VAD VAG VAV VAH 2 8229021VAD VAG VAV VAH 3 6363683

Hardware fault tolerance (1 valve) HFT 0

Hardware fault tolerance (2 valves) HFT 1

Safe failure fraction SFF gt 90Fraction of undetected com-mon cause failures β ge 2

Max service life under operating conditions10 years after date of production plus max 12 year in stor-age prior to first use or once the given number of operating cycles has been reached depending on which is achieved firstThe devices are suitable for single-channel systems (HFT = 0) up to SIL 2PL d and up to SIL 3PL e when two re-dundant valves are installed in a double-channel architecture (HFT = 1) provided that the complete system complies with the requirements of EN 61508ISO 13849

For a glossary of terms see page 53 (Glossary)

Technical data

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 50

nop 1hnop 1a

sB10d

T10d aPFHD (1 VAx) 1h

PFHD (2 VAx) 1h

PFDavg (1 VAx)

PFDavg (2 VAx)

Technical data gt Safety-specific characteristic values for VAx 1 ndash 3

9 5 1 Determining the PFHD value the λD value and the MTTFd value

PFHD = λD = x nop= 1MTTFd

01B10d

PFDavg = x λD x 24 x 365 x T10d 12

Type

Cycle time

suitable for

suitable for

PFHD = Probability of dangerous failure (HDM = high de-mand mode) [1hour]PFDavg = Average probability of dangerous failure on de-mand (LDM = low demand mode)λD = Mean dangerous failure rate [1hour]MTTFd = Mean time to dangerous failure [hours]nop = Demand rate (mean number of annual operations) [1hour]

9 5 2 Calculating the PFHD and PFDavg

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 51

VAD VAG VAH VAV

H1

Rp frac14(NPT frac14)

H2

E

LF

F

H4

H3

B

VAxS VAxF

L2G

G

Technical data

9 6 Dimensions

Type

Connec-tion Dimensions

WeightRpNPT DN

L L2 E F G H1 H2 H3 H4 Bmm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch kg lbs

VAx 115 12 15 75 29 ndash ndash 75 29 15 06 ndash ndash 143 56 82 32 161 63 117 46 97 38 18 40VAH 115 12 15 75 29 ndash ndash 75 29 15 06 ndash ndash 143 56 100 39 161 63 135 53 97 38 2 44VAx 120 34 20 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 82 33 161 63 117 46 97 38 19 42VAH 120 34 20 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 100 39 161 63 135 53 97 38 21 46VAx 125 1 25 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 82 33 161 63 117 46 97 38 19 42VAH 125 1 25 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 100 39 161 63 135 53 97 38 21 46VAx 240 112 40 128 50 200 79 85 33 29 11 66 26 170 67 112 44 191 75 162 64 125 49 44 97VAH 240 112 40 128 50 200 79 85 33 29 11 66 26 170 67 132 52 191 75 182 72 125 49 47 104VAx 350 2 50 155 61 230 91 85 33 36 14 74 29 180 70 135 53 201 79 196 77 160 63 61 134VAH 350 2 50 155 61 230 91 85 33 36 14 74 29 180 70 156 61 201 79 217 85 160 63 64 141

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 52

10 Converting unitssee wwwadlatusorg

11 Maintenance cyclesAt least once per annum at least twice per annum for biologi-cally produced methaneIf the flow rate drops clean the strainer

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 53

12 Glossary12 1 Diagnostic coverage DCMeasure of the effectiveness of diagnostics which may be determined as the ratio between the failure rate of detected dangerous failures and the failure rate of total dangerous failuresNOTE Diagnostic coverage can exist for the whole or parts of a safety-related system For example diagnostic cover-age could exist for sensors andor logic system andor final elements Unit see EN ISO 13849-12008

12 2 Mode of operationHigh demand mode or continuous modeOperating mode where the frequency of demands for opera-tion made on a safety-related system is greater than one per year or greater than twice the proof-test frequencysee EN 61508-42008

12 3 CategoryClassification of the safety-related parts of a control system in respect of their resistance to faults and their subsequent behaviour in the fault condition and which is achieved by the structural arrangement of the parts fault detection andor by their reliability see EN ISO 13849-12008

12 4 Common cause failure CCFFailures of different items resulting from a single event where these failures are not consequences of each othersee EN ISO 13849-12008

12 5 Fraction of undetected common cause failures β Fraction of undetected failures of redundant components due to a single event whereby these failures are not based on mutual causesNOTE β is expressed as a fraction in the equations and as a percentage elsewheresee EN 61508-62010

12 6 B10d valueMean number of cycles until 10 of the components fail dan-gerouslysee EN ISO 13849-12008

12 7 T10d valueMean time until 10 of the components fail dangerouslysee EN ISO 13849-12008

12 8 Hardware fault tolerance HFTA hardware fault tolerance of N means that N + 1 is the mini-mum number of faults that could cause a loss of the safety functionsee IEC 61508-22010

12 9 Mean dangerous failure rate λD Mean rate of dangerous failures during operation time (T10d) Unit 1hsee EN ISO 13849-12008

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 54

12 10 Safe failure fraction SFFFraction of safe failures related to all failures which are as-sumed to appearsee EN 13611A22011

12 11 Probability of dangerous failure PFHD Value describing the likelihood of dangerous failure per hour of a component for high demand mode or continuous mode Unit 1hsee EN 13611A22011

12 12 Mean time to dangerous failure MTTFd Expectation of the mean time to dangerous failuresee EN ISO 13849-12008

12 13 Demand rate nop Mean number of annual operationssee EN ISO 13849-12008

12 14 Average probability of dangerous failure on demand PFDavg (LDM = 1 ndash 10 switching cyclesyear)Average probability of a dangerous failure of the safety function on demand (LDM = low demand mode)see EN 61508-6

Glossary

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415

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Remarks

(Adobe Reader 7 or higher required) wwwadobecom

Elster GmbH Postfach 2809 middot 49018 Osnabruumlck Strotheweg 1 middot 49504 Lotte (Buumlren) GermanyT +49 541 1214-0 F +49 541 1214-370 infokromschroedercomwwwkromschroedercom

The current addresses of our international agents are available on the Internetwwwkromschroederdeindexphpid=718ampL=1

We reserve the right to make technical modifications in the interests of progressCopyright copy 2015 Elster GmbH All rights reserved

Contact

Feedback

0325

0530

  • Pressure regulators with solenoid valve VAD VAG VAV VAH
  • Flow rate regulator VRH
  • Pressure regulators with double solenoid valve VCD VCG VCV VCH
  • Contents
  • 1 Application
    • 11 Examples of application
      • 111 Constant pressure control
      • 112 Constant pressure control with two gas solenoid valves
      • 113 Constant pressure control with max pressure switch
      • 114 Constant pressure control with non-controlled pilot gas outlet
      • 115 Modulating control
      • 116 Modulating control with two gas solenoid valves
      • 117 Modulating control with two gas solenoid valves and inlet pressure switch
      • 118 HighLow control
      • 119 Zero pressure control
      • 1110 Staged flow rate control
      • 1111 Continuous or staged flow rate control
      • 1112 Modulating control with variable airgas ratio control with gas solenoid valve
      • 1113 Modulating control in residential heat generation
          • 2 Certification
          • 3 Function
            • 31 VAD VAG VAH VRH VAV
              • 311 Pressure regulator for gas VAD
              • 312 Airgas ratio control VAG
              • 313 Flow rate regulators VAH VRH
              • 314 Variable airgas ratio control VAV
              • 315 Pressure regulator with gas solenoid valve VAxS position indicator with visual indicator
                • 32 Animation
                • 33 Connection diagram
                  • 331 VAx with M20 cable gland
                  • 332 VAx with plug
                  • 333 VAS with VADVAGVAHVAV with M20 cable gland
                  • 334 VAS with VADVAGVAHVAV with plug
                      • 4 Replacement possibilities for MODULINE pressure regulators with gas solenoid valve
                        • 41 GVS GVI GVIB GVR and GVRH are to be replaced by VAD VAG VAG+VAS VAH and VAV
                          • 5 Flow rate
                            • 51 Selection example for VAD
                              • 511 Calculate VAD
                                • 52 Selection example for VAG VAH VRH VAV
                                  • 521 CalculateVAG VxHVAV
                                    • 53 Selection example for zero governor VAGN
                                      • 531 Calculate VAGN
                                          • 6 Selection
                                            • 61 Selection table for pressure regulator with solenoid valve VAD
                                            • 62 Type code for VAD
                                            • 63 Selection table for airgas ratio control with solenoid valve VAG flow rate regulators VAH VRH
                                            • 64 Type code for VAG VAH VRH
                                            • 65 Selection table for variable airgas ratio control with solenoid valve VAV
                                            • 66 Type code for VAV
                                            • 67 Accessories
                                              • 7 Project planning information
                                                • 71 Installation
                                                  • 711 Installation position
                                                    • 72 Setting the low-fire rate on VAG VAH VRH VAV
                                                    • 73 Setting the high-fire rate on VAV
                                                      • 731 Calculation
                                                          • 8 Accessories
                                                            • 81 Gas pressure switch DGVC for VAx VRH
                                                            • 82 Gas pressure switch DGVCT for VAxT VRHT
                                                            • 83 Bypass valvepilot gas valve VAS 1
                                                              • 831 VAS 1 attached to VADVAGVAHVAV 1
                                                              • 832 VAS 1 attached to VADVAGVAHVAV 2 VADVAGVAHVAV 3
                                                              • 833 Flow rate
                                                                • 84 Bypass valvepilot gas valve VBY 8 for VADVAGVAHVAV 1
                                                                  • 841 Scope of delivery VBY 8I as bypass valve
                                                                  • 842 Scope of delivery VBY 8R as pilot gas valve
                                                                  • 843 Selection
                                                                  • 844 Type code
                                                                  • 845 Flow rate
                                                                  • 846 Technical data
                                                                    • 85 Tightness control TC 116V
                                                                    • 86 Pressure test points
                                                                    • 87 Cable gland set
                                                                    • 88 Seal set VA 1thinspndashthinsp3
                                                                    • 89 Differential pressure orifice
                                                                    • 810 Retaining frame
                                                                    • 811 Attachment block
                                                                    • 812 Gas control line
                                                                    • 813 Measuring orifice VMO
                                                                    • 814 Filter module VMF
                                                                    • 815 Fine-adjusting valve VMV
                                                                      • 9 Technical data
                                                                        • 91 VAD
                                                                        • 92 VAG
                                                                        • 93 VAH VRH
                                                                        • 94 VAV
                                                                        • 95 Safety-specific characteristic values for VAx 1thinspndashthinsp3
                                                                          • 951 Determining the PFHD value the λD value and the MTTFd value
                                                                          • 952 Calculating the PFHD and PFDavg
                                                                            • 96 Dimensions
                                                                              • 10 Converting units
                                                                              • 11 Maintenance cycles
                                                                              • 12 Glossary
                                                                                • 121 Diagnostic coverage DC
                                                                                • 122 Mode of operation
                                                                                • 123 Category
                                                                                • 124 Common cause failure CCF
                                                                                • 125 Fraction of undetected common cause failures β
                                                                                • 126 B10d value
                                                                                • 127 T10d value
                                                                                • 128 Hardware fault tolerance HFT
                                                                                • 129 Mean dangerous failure rate λD
                                                                                • 1210 Safe failure fraction SFF
                                                                                • 1211 Probability of dangerous failure PFHD
                                                                                • 1212 Mean time to dangerous failure MTTFd
                                                                                • 1213 Demand rate nop
                                                                                • 1214 Average probability of dangerous failure on demand PFDavg
                                                                                  • Feedback
                                                                                  • Contact
                                                                                      1. naechste_Seite 24
                                                                                      2. naechste Seite 18
                                                                                      3. naechste Seite 6
                                                                                      4. naechste Seite 16
                                                                                      5. naechste Seite 14
                                                                                      6. naechste Seite 25
                                                                                      7. naechste_Seite 11
                                                                                      8. naechste_Seite 17
                                                                                      9. fbArbeitspunkt_Min Ja
                                                                                      10. fbArbeitspunkt Ja
                                                                                      11. ftProgramm Standard-Programm
                                                                                      12. fz_kv
                                                                                      13. fz_pe 80
                                                                                      14. fz_pG 60
                                                                                      15. fzDelta_p_Soll 20
                                                                                      16. ftEinheit_Druck mbar
                                                                                      17. fatTyp [115]
                                                                                      18. fbArbeitspunkt_Min_2 Ja
                                                                                      19. fbArbeitspunkt_2 Ja
                                                                                      20. ftRegler_Typ VAG
                                                                                      21. ftProgramm_2 Standard-Programm
                                                                                      22. fz_kv_2
                                                                                      23. fatMedium [08]
                                                                                      24. fzDichte 08
                                                                                      25. ftEinheit_Dichte kgm3
                                                                                      26. fzV_Norm 30
                                                                                      27. ftEinheit_Volstrom m3h
                                                                                      28. fz_pe_2 80
                                                                                      29. fz_pG_2 60
                                                                                      30. fzDelta_p_Soll_2 20
                                                                                      31. ftEinheit_Druck2 [mbar]
                                                                                      32. ftEinheit_Geschw [ms]
                                                                                      33. fatTyp_2 [10954451150103322]
                                                                                      34. fbArbeitspunkt_Min_3 Ja
                                                                                      35. fbArbeitspunkt_3 Ja
                                                                                      36. ftProgramm_3 Standard-Programm
                                                                                      37. fz_kv_3
                                                                                      38. fz_pe_3 20
                                                                                      39. fz_pG_3 0
                                                                                      40. fzDelta_p_Soll_3 20
                                                                                      41. fatTyp_3 [123]
                                                                                      42. fatSchaltleistung [6363683]
                                                                                      43. fz_nop_Stunde 1
                                                                                      44. fz_nop_Jahr 8760
                                                                                      45. fzZyklus 3600
                                                                                      46. fzB10d 6363683
                                                                                      47. fzT10d 10
                                                                                      48. fzPFHd_1V 15714170551864384e-8
                                                                                      49. fzPFDavg_1V
                                                                                      50. ftGeeignet_1V PL d SIL 2
                                                                                      51. fzPFHd_2V 33505832253532625e-10
                                                                                      52. fzPFDavg_2V
                                                                                      53. ftGeeignet_2V PL e SIL 3
                                                                                      54. ftUebersicht Off
                                                                                      55. ftVerstaendlichkeit Off
                                                                                      56. ftFehlende_Info
                                                                                      57. ftUmfang Off
                                                                                      58. ftVerwendung_1 Off
                                                                                      59. ftVerwendung_2 Off
                                                                                      60. ftVerwendung_3 Off
                                                                                      61. ftVerwendung_4 Off
                                                                                      62. ftNavigation Off
                                                                                      63. ftTaetigkeitsbereich Off
                                                                                      64. ftBemerkung
                                                                                      65. Michael Rehkamp Elster Kromschroumlder>btnSenden
Page 36: VAD, VAG, VAV, VAH, VRH, VCD, VCG, VCV, VCH · PDF fileVAD, VAG, VAH, VAV, VRH, VCD, VCG, VCV, VCH · Edition 04.15 6 VAD VAD VAS 1 .1 Examples of application 1 .1 .1 Constant pressure

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 36

VAVThe impulse line for the combustion chamber control pres-sure psc must be fitted so that no condensation can enter the pressure regulator but rather flows back into the combustion chamber

7 2 Setting the low-fire rate on VAG VAH VRH VAV

-10 +05-05

ndash

+1

-15

mbar

+15

06

1 152

3

N V

+ +ndash

+30 -15+15

ndash

-3

+5

mbar

-5

N

+

VAG VAH VRH VAV

If the burner operates at low-fire rate the gasair mixture can be changed using the parallel shift of the characteristic curve by turning the adjusting screw ldquoNrdquoAdjusting range at low fire VAG VAH VRH -5 to +5 mbar (-195 to +195 WC) VAV -15 to +15 mbar (-06 to +06 WC)

7 3 Setting the high-fire rate on VAVTo set the high-fire rate the transmission ratio is changed us-ing the adjusting screw ldquoVrdquo until the required flue gas values are achievedTransmission ratio V = pdpsa = 061 to 31The settings N and V can influence each other and must be repeated if necessary

+N+V

-V

-N

VAV

psa [mbar]

p d [m

bar]

7 3 1 CalculationWith no connection to the combustion chamber control pres-sure psc pd = V times psa + NWith connection to the combustion chamber control pressure psc (pd - psc) = V times (psa - psc) + N

Project planning information

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 37

pu pd

21579

4836

085310

189

142

8 Accessories8 1 Gas pressure switch DG VC for VAx VRHType Adjusting range [mbar]DG 17VC 2 to 17DG 40VC 5 to 40DG 110VC 30 to 110DG 300VC 100 to 300

Scope of delivery 1 times pressure switch for gas 2 times retaining screws 2 times sealing rings

8 2 Gas pressure switch DG VCT for VAx T VRH TType Adjusting range [WC]DG 17VCT 08 to 68DG 40VCT 2 to 16DG 110VCT 12 to 44DG 300VCT 40 to 120

Scope of delivery 1 times gas pressure switch with AWG 18 connection wires 2 times retaining screws 2 times sealing ringsMonitoring the inlet pressure pu the electrical plug of the pressure switch for gas points towards the inlet flangeMonitoring the outlet pressure pd the electrical plug of the pressure switch for gas points towards the outlet flange

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 38

A BC

D

FE

ACD

F

B

E

8 3 Bypass valvepilot gas valve VAS 18 3 1 VAS 1 attached to VADVAGVAHVAV 1Scope of delivery A 1 times bypasspilot gas valve VAS 1 B 4 times O-rings C 4 times double nuts D 4 times connection parts E 1 times mounting aidBypass valve VAS 1 F 2 times connection pipes if the bypass valve has a blind flange

at the outlet sidePilot gas valve VAS 1 F 1 times connection pipe 1 times sealing plug if the pilot gas valve

has a threaded flange at the outlet side

Accessories

8 3 2 VAS 1 attached to VADVAGVAHVAV 2 VADVAGVAHVAV 3Scope of delivery A 1 times bypasspilot gas valve VAS 1 B 4 times O-rings C 4 times spacer sleeves D 4 times connection parts E 1 times mounting aidBypass valve VAS 1 F 2 times connection pipes if the bypass valve has a blind flange

at the outlet sidePilot gas valve VAS 1 F 1 times connection pipe 1 times sealing plug if the pilot gas valve

has a threaded flange at the outlet side

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 39

2

3

456

810

20

30

405060

80100

∆p [m

bar]

005 01 02 03 05 08 1 2 3 4 51

3

2

Qn [m3h]

1

01

02

03

0405

08

003

002

6 8 10

005 01 02 03 05 08 1 2 3 4 5003 6 8 10

20

005 01 02 03 05 08 1 2 3 4 5003 6 8 10 20

30

∆p [i

nch

WC]

1

2

3

456

810

20

30

40

04

004

006

00801

02

03

0506

08

Qn [SCFH]10 40 60 100 200 3001 500 10002 3 4 5

120 306 8

21 3 4 5 6 7 8 910

8 3 3 Flow rate

The characteristic flow rate curves have been measured for bypass valve VAS 1 with connection pipe diameter 1 to 10 mm (004 to 04) and for the pilot gas valve with 10 mm (04) connection pipe

Bypass valve connection pipe diameter [mm]

Pilo

t gas

val

ve 1

0 m

m (0

4)

conn

ectio

n pi

pe d

iam

eter

Accessories gt Bypass valvepilot gas valve VAS 1

= natural gas (ρ = 080 kgm3) = propane (ρ = 201 kgm3) = air (ρ = 129 kgm3)

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 40

Accessories

8 4 Bypass valvepilot gas valve VBY 8 for VADVAGVAHVAV 1

B

C

AVBY 8

VAx 1

55

(217)40(157)

70 (276)

80(315)

Rp frac14(pilot gas valve)

For mounting on VAD VAG VAH VAV 1 and double solenoid valve VCD VCG VCH VCV 1

8 4 1 Scope of delivery VBY 8I as bypass valveA 1 times bypass valve VBY 8IB 2 times retaining screws with 4 times O-rings both retaining screws

have a bypass orificeC 1 times grease for o-rings

8 4 2 Scope of delivery VBY 8R as pilot gas valveA 1 times pilot gas valve VBY 8RB 2 times retaining screws with 5 x O-rings one retaining screw

has a bypass orifice (2 x O-rings) the other does not (3 x O-rings)

C 1 times grease for O-rings

8 4 3 SelectionType I R W Q K 6L -R -L E B D 05

VBY 8

Order exampleVBY 8RW6L-LED

8 4 4 Type codeCode DescriptionVBY Gas solenoid valve8 Nominal sizeIR

For internal gas pick-up as bypass valveFor external gas pick-up as pilot gas valve

KQW

Mains voltage 24 V DC Mains voltage 120 V AC 5060 HzMains voltage 230 V AC 5060 Hz

6L Electrical connection via plug and socket with LED-R-L

Attachment side of main valve right-hand sideAttachment side of main valve left-hand side

EB

Attached to the VAxEnclosed (separate packing unit)

05D

Nozzle diameter = 05 mm (002)Flow adjustment

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 41

2

01

02

03

05

081

3

456

810

20

30

405060

80100

∆p [m

bar]

1

3

201 02 03 05 1 2 3001 003 4

Qn [m3h]

02 03 05 1 2

01 02 05

002 006

002

002 006 1

0010006 005 01

001

0003

0006 2 3

VBY 8DVBY 805

∆p [i

nch

WC]

1

2

3

456

810

20

30

40

040506

08

1

Qn [SCFH]10 40 60 1005 2081 2 30402

01

02

03

004005006

008

Adjusting range

8 4 5 Flow rateVBY 8 D

+

-

The flow rate can be set by turning the flow rate restrictor (4 mm016 Allen screw) frac14 of a turn Flow rate 10 to 100

VBY 8 05The flow is routed through a 05 mm (002) nozzle and thus has a fixed characteristic flow rate curve Adjustment is not possible

8 4 6 Technical dataInlet pressure pu max 500 mbar (7 psig)Ambient temperature 0 to +60degC (32 to 140degF) no condensation permittedStorage temperature 0 to +40degC (32 to 104degF) no condensation permittedPower consumption 24 V = 8 W 120 V = 8 W 230 V = 95 WEnclosure IP 54

Accessories gt Bypass valvepilot gas valve VBY 8 for VADVAGVAHVAV 1

= natural gas (ρ = 080 kgm3) = propane (ρ = 201 kgm3) = air (ρ = 129 kgm3)

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 42

TC 116VB C

56(22)

49(193)

27(106)

A

A

VCx 1 VCx 2VCx 3

8 5 Tightness control TC 116Vfor VAx 1 ndash 3An adapter plate is required to attach the tightness control to the right- or left-hand side of the pressure regulator with gas solenoid valveScope of delivery A 1 times adapter plate B 2 times O-rings C 2 times retaining screwsFor attachment to left-hand side Order No 74922391 right-hand side Order No 74921995

8 6 Pressure test pointsTest points to check the inlet pressure pu and outlet pressure pdScope of delivery 1 x pressure test points with 1 x profiled sealing rings Order No 74923390

8 7 Cable gland setWhen wiring a double solenoid valve with pressure regula-tor VCx the connection boxes are to be connected using a cable gland setThe cable gland set can only be used if the connection boxes are at the same height and on the same side and if both valves are equipped either with or without a proof of closure switchVA 1 Order No 74921985 VA 2 Order No 74921986 VA 3 Order No 74921987

Accessories

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 43

A B

D

C

Accessories

8 9 Differential pressure orifice

Size PipeDN

Differential pressure orifi cewith outlet dia

1 15 17 mm 0671 20 25 mm 0981 25 30 mm 1182 40 46 mm 1813 50 58 mm 228

If pressure regulator VADVAGVAV 1 is retrofitted upstream of gas solenoid valve VAS 1 a DN 25 differential pressure orifice with outlet opening d = 30 mm (118) must be inserted at the outlet of the pressure regulatorIn the case of pressure regulator VAx 115 or VAx 120 the DN 25 differential pressure orifice must be ordered separately and retrofitted Order No 74922240

8 8 Seal set VA 1 ndash 3VA 1 Order No 74921988 VA 2 Order No 74921989 VA 3 Order No 74921990Scope of deliveryA 1 times double block seal B 2 times O-rings (flange) C 2 times O-rings (pressure switch) for pressure test pointscrew plug D 2 times sealing rings (flat sealing) and 2 times profiled sealing rings

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 44

BA

C

pd-

8 11 Attachment blockFor locked installation of pressure gauge and other acces-soriesScope of delivery A 1 times attachment block B 2 times self-tapping screws for installation C 2 times O-rings

Accessories

8 10 Retaining frameIn the event that a pressure regulator VAx is installed at a later point upstream of a gas solenoid valve VAS a measur-ing orifice VMO or a fine-adjusting valve VMV the retaining frame must be fitted at the inlet of the second device in order to fasten the differential pressure orifice at the regulator outlet Order the retaining frame separatelyRetaining frame for Size 1 Order No 74923029 Size 2 Order No 74923030 Size 3 Order No 74923031

8 12 Gas control lineFine-adjusting valve VMV can be installed on the flow rate regulator VAH for fine adjustment of the gas flow rateThe gas control line for gas outlet pressure pd- is available with 2 18 compression fittingsSize 1 Order No 74924458 Size 2 Order No 74924459

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 45

8 13 Measuring orifice VMOThe measuring orifice VMO is designed to reduce the gas and air flow rates and is installed downstream of the valVario control The measuring orifice is available with Rp internal thread (NPT internal thread) or flange to ISO 7005See wwwdocuthekcom Elster Kromschroumlder Krom-schroumlder LBE Products 03 Valves and butterfly valves valVario accessories Type of document Technical Informa-tion VMO

Accessories

8 14 Filter module VMFUsing the filter module VMF the gas flow upstream of the gas solenoid valve VAS and the airgas ratio control is cleaned The filter module is available with Rp internal thread (NPT internal thread) or flange to ISO 7005 and can also be supplied with fitted pressure switch as an optionSee wwwdocuthekcom Elster Kromschroumlder Krom-schroumlder LBE Products 03 Valves and butterfly valves valVario accessories Type of document Technical Informa-tion VMF

8 15 Fine-adjusting valve VMVThe flow rate is set using the fine-adjusting valve VMV The fine-adjusting valve is available with Rp internal thread (NPT internal thread) or flange to ISO 7005See wwwdocuthekcom Elster Kromschroumlder Krom-schroumlder LBE Products 03 Valves and butterfly valves valVario accessories Type of document Technical Infor-mation VMV

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 46

9 Technical dataGas types natural gas LPG (gaseous) biologically produced methane (max 01 -by-vol H2S) or clean air other gases on request The gas must be clean and dry in all temperature conditions and must not contain condensateCE and FM approved UL listed max inlet pressure pu 10 ndash 500 mbar (4 ndash 200 WC) FM approved (230 V AC 120 V AC 24 V DC) non opera-tional pressure 700 mbar (10 psig)ANSICSA approved (230 V AC 120 V AC 24 V DC) up to 350 mbar (5 psig)Opening time of the solenoid valve quick opening le 05 s Closing time quick closing lt 1 sMedium and ambient temperatures -20 to +60degC (-4 to +140degF) no condensation permittedStorage temperature -20 to +40degC (-4 to +104degF)Enclosure IP 65Valve housing aluminium valve seal NBRConnection flanges with internal thread Rp to ISO 7-1 NPT to ANSIASMESafety valve Class A to EN 161 Factory Mutual Research Class 7400 Process Control Valves (230 V AC 120 V AC 24 V DC) ANSI Z2121 and CSA 65 ANSI Z2118 and CSA 63Control class A to EN 88-1Control range up to 101

Mains voltage 230 V AC +10-15 5060 Hz 200 V AC +10-15 5060 Hz 120 V AC +10-15 5060 Hz 100 V AC +10-15 5060 Hz 24 V DC plusmn20Duty cycle 100Power factor of the solenoid coil cos φ = 09Power consumption

Type Voltage Power

VAx 1

24 V DC 25 W ndash100 V AC 25 W (26 VA)120 V AC 25 W (26 VA)200 V AC 25 W (26 VA)230 V AC 25 W (26 VA)

VAx 2 VAx 3

24 V DC 36 W ndash100 V AC 36 W (40 VA)120 V AC 40 W (44 VA)200 V AC 40 W (44 VA)230 V AC 40 W (44 VA)

VBY24 V DC 8 W ndash

120 V AC 8 W ndash230 V AC 95 W ndash

Cable gland M20 times 15Electrical connection cable with max 25 mm2 (AWG 12) or plug with socket to EN 175301-803

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 47

Position indicator contact rating

Type Voltage Min current(resistive load)

Max current(resistive load)

VAxS VCxS 12 ndash 250 V AC 5060 Hz 100 mA 3 AVAxG VCxG 12 ndash 30 V DC 2 mA 01 A

Position indicator switching frequency max 5 times per minute

Switching current [A]

Switching cyclescos φ = 1 cos φ = 06

01 500000 50000005 300000 250000

1 200000 1000003 100000 ndash

Limited to max 200000 cycles for heating systems

9 1 VADOutlet pressure pd VAD-25 25 ndash 25 mbar (1 ndash 10 WC) VAD-50 20 ndash 50 mbar (8 ndash 20 WC) VAD-100 35 ndash 100 mbar (14 ndash 40 WC)Combustion chamber control pressure psc (connection psa)

-20 to +20 mbar (-78 to +78 WC)

VAD

pu

pd

(psa)

9 2 VAGOutlet pressure pd 05 ndash 100 mbar (02 ndash 40 WC)Air control pressure psa 05 ndash 100 mbar (02 ndash 40 WC)

Adjusting range at low fire plusmn5 mbar (plusmn2 WC)Transmission ratio of gas to air 11The inlet pressure must always be higher than the air control pressure psa + pressure loss ∆p + 5 mbar (2 WC)

VAGpd

pu

psa

psa

VAGK 1 x 18 coupling for plastic hose (internal dia 39 mm (015) external dia 61 mm (024)) or VAGE 1 x 18 compression fitting for 6 times 1 tube or VAGA 1 x NPT 18 adapter or VAGN zero governor with breathing orifice

9 3 VAH VRHAir control pressure psa 06 ndash 100 mbar (024 ndash 40 WC) Differential air pressure ∆psa (psa - psa-) 06 ndash 50 mbar (024 ndash 197 WC) Differential gas pressure ∆pd (pd - pd-) 06 ndash 50 mbar (024 ndash 197 WC)Transmission ratio of gas to air 11The inlet pressure must always be higher than the differen-tial air pressure ∆psa + pressure loss ∆p + max gas pres-sure on burner + 5 mbar (2 WC)Adjusting range at low fire plusmn5 mbar (plusmn2 WC)

Technical data

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 48

VAHVRH

pd-

pu

psa-

psa

Connection of the air control pressure psaVAHE VRHE 3 x 18 compression fitting for 6 times 1 tube or VAHA VRHA 3 x NPT 18 adapter

9 4 VAVOutlet pressure pd 05 ndash 30 mbar (02 ndash 117 WC)Air control pressure psa 04 ndash 30 mbar (015 ndash 117 WC)Combustion chamber control pressure psc

-20 to +20 mbar (-78 to +78 WC)Min control pressure differential psa - psc 04 mbar (015 WC)Min pressure differential pd - psc 05 mbar (02 WC)Adjusting range at low fire plusmn15 mbar (plusmn06 WC)Transmission ratio of gas to air 061 to 31The inlet pressure pu must always be higher than the air control pressure psa times transmission ratio V + pressure loss ∆p + 15 mbar (06 WC)

pu

pd psapsc

VAV

VAVK 2 x plastic hose couplings (internal dia 39 mm (015) external dia 61 mm (024)) or VAVE 2 x 18 compression fitting for 6 times 1 tube or VAVA 2 x NPT 18 adapter

Technical data

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 49

9 5 Safety-specific characteristic values for VAx 1 ndash 3For SILSuitable for Safety Integrity Level SIL 1 2 3

Diagnostic coverage DC 0

Type of subsystem Type A to EN 61508-2 74312

Operating mode High demand mode pursu-ant to EN 61508-4 3512

For PLSuitable for Performance Level PL a b c d e

Category B 1 2 3 4Common cause failure CCF gt 65Application of essential safety requirements Satisfied

Application of tried-and-tested safety requirements Satisfied

For SIL and PL

B10d value

Operating cyclesVAD VAG VAV VAH 1 10094360VAD VAG VAV VAH 2 8229021VAD VAG VAV VAH 3 6363683

Hardware fault tolerance (1 valve) HFT 0

Hardware fault tolerance (2 valves) HFT 1

Safe failure fraction SFF gt 90Fraction of undetected com-mon cause failures β ge 2

Max service life under operating conditions10 years after date of production plus max 12 year in stor-age prior to first use or once the given number of operating cycles has been reached depending on which is achieved firstThe devices are suitable for single-channel systems (HFT = 0) up to SIL 2PL d and up to SIL 3PL e when two re-dundant valves are installed in a double-channel architecture (HFT = 1) provided that the complete system complies with the requirements of EN 61508ISO 13849

For a glossary of terms see page 53 (Glossary)

Technical data

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 50

nop 1hnop 1a

sB10d

T10d aPFHD (1 VAx) 1h

PFHD (2 VAx) 1h

PFDavg (1 VAx)

PFDavg (2 VAx)

Technical data gt Safety-specific characteristic values for VAx 1 ndash 3

9 5 1 Determining the PFHD value the λD value and the MTTFd value

PFHD = λD = x nop= 1MTTFd

01B10d

PFDavg = x λD x 24 x 365 x T10d 12

Type

Cycle time

suitable for

suitable for

PFHD = Probability of dangerous failure (HDM = high de-mand mode) [1hour]PFDavg = Average probability of dangerous failure on de-mand (LDM = low demand mode)λD = Mean dangerous failure rate [1hour]MTTFd = Mean time to dangerous failure [hours]nop = Demand rate (mean number of annual operations) [1hour]

9 5 2 Calculating the PFHD and PFDavg

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 51

VAD VAG VAH VAV

H1

Rp frac14(NPT frac14)

H2

E

LF

F

H4

H3

B

VAxS VAxF

L2G

G

Technical data

9 6 Dimensions

Type

Connec-tion Dimensions

WeightRpNPT DN

L L2 E F G H1 H2 H3 H4 Bmm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch kg lbs

VAx 115 12 15 75 29 ndash ndash 75 29 15 06 ndash ndash 143 56 82 32 161 63 117 46 97 38 18 40VAH 115 12 15 75 29 ndash ndash 75 29 15 06 ndash ndash 143 56 100 39 161 63 135 53 97 38 2 44VAx 120 34 20 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 82 33 161 63 117 46 97 38 19 42VAH 120 34 20 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 100 39 161 63 135 53 97 38 21 46VAx 125 1 25 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 82 33 161 63 117 46 97 38 19 42VAH 125 1 25 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 100 39 161 63 135 53 97 38 21 46VAx 240 112 40 128 50 200 79 85 33 29 11 66 26 170 67 112 44 191 75 162 64 125 49 44 97VAH 240 112 40 128 50 200 79 85 33 29 11 66 26 170 67 132 52 191 75 182 72 125 49 47 104VAx 350 2 50 155 61 230 91 85 33 36 14 74 29 180 70 135 53 201 79 196 77 160 63 61 134VAH 350 2 50 155 61 230 91 85 33 36 14 74 29 180 70 156 61 201 79 217 85 160 63 64 141

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 52

10 Converting unitssee wwwadlatusorg

11 Maintenance cyclesAt least once per annum at least twice per annum for biologi-cally produced methaneIf the flow rate drops clean the strainer

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 53

12 Glossary12 1 Diagnostic coverage DCMeasure of the effectiveness of diagnostics which may be determined as the ratio between the failure rate of detected dangerous failures and the failure rate of total dangerous failuresNOTE Diagnostic coverage can exist for the whole or parts of a safety-related system For example diagnostic cover-age could exist for sensors andor logic system andor final elements Unit see EN ISO 13849-12008

12 2 Mode of operationHigh demand mode or continuous modeOperating mode where the frequency of demands for opera-tion made on a safety-related system is greater than one per year or greater than twice the proof-test frequencysee EN 61508-42008

12 3 CategoryClassification of the safety-related parts of a control system in respect of their resistance to faults and their subsequent behaviour in the fault condition and which is achieved by the structural arrangement of the parts fault detection andor by their reliability see EN ISO 13849-12008

12 4 Common cause failure CCFFailures of different items resulting from a single event where these failures are not consequences of each othersee EN ISO 13849-12008

12 5 Fraction of undetected common cause failures β Fraction of undetected failures of redundant components due to a single event whereby these failures are not based on mutual causesNOTE β is expressed as a fraction in the equations and as a percentage elsewheresee EN 61508-62010

12 6 B10d valueMean number of cycles until 10 of the components fail dan-gerouslysee EN ISO 13849-12008

12 7 T10d valueMean time until 10 of the components fail dangerouslysee EN ISO 13849-12008

12 8 Hardware fault tolerance HFTA hardware fault tolerance of N means that N + 1 is the mini-mum number of faults that could cause a loss of the safety functionsee IEC 61508-22010

12 9 Mean dangerous failure rate λD Mean rate of dangerous failures during operation time (T10d) Unit 1hsee EN ISO 13849-12008

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 54

12 10 Safe failure fraction SFFFraction of safe failures related to all failures which are as-sumed to appearsee EN 13611A22011

12 11 Probability of dangerous failure PFHD Value describing the likelihood of dangerous failure per hour of a component for high demand mode or continuous mode Unit 1hsee EN 13611A22011

12 12 Mean time to dangerous failure MTTFd Expectation of the mean time to dangerous failuresee EN ISO 13849-12008

12 13 Demand rate nop Mean number of annual operationssee EN ISO 13849-12008

12 14 Average probability of dangerous failure on demand PFDavg (LDM = 1 ndash 10 switching cyclesyear)Average probability of a dangerous failure of the safety function on demand (LDM = low demand mode)see EN 61508-6

Glossary

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415

Finally we are offering you the opportunity to assess this ldquoTechnical Information (TI)rdquo and to give us your opinion so that we can improve our documents further and suit them to your needs

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Remarks

(Adobe Reader 7 or higher required) wwwadobecom

Elster GmbH Postfach 2809 middot 49018 Osnabruumlck Strotheweg 1 middot 49504 Lotte (Buumlren) GermanyT +49 541 1214-0 F +49 541 1214-370 infokromschroedercomwwwkromschroedercom

The current addresses of our international agents are available on the Internetwwwkromschroederdeindexphpid=718ampL=1

We reserve the right to make technical modifications in the interests of progressCopyright copy 2015 Elster GmbH All rights reserved

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0530

  • Pressure regulators with solenoid valve VAD VAG VAV VAH
  • Flow rate regulator VRH
  • Pressure regulators with double solenoid valve VCD VCG VCV VCH
  • Contents
  • 1 Application
    • 11 Examples of application
      • 111 Constant pressure control
      • 112 Constant pressure control with two gas solenoid valves
      • 113 Constant pressure control with max pressure switch
      • 114 Constant pressure control with non-controlled pilot gas outlet
      • 115 Modulating control
      • 116 Modulating control with two gas solenoid valves
      • 117 Modulating control with two gas solenoid valves and inlet pressure switch
      • 118 HighLow control
      • 119 Zero pressure control
      • 1110 Staged flow rate control
      • 1111 Continuous or staged flow rate control
      • 1112 Modulating control with variable airgas ratio control with gas solenoid valve
      • 1113 Modulating control in residential heat generation
          • 2 Certification
          • 3 Function
            • 31 VAD VAG VAH VRH VAV
              • 311 Pressure regulator for gas VAD
              • 312 Airgas ratio control VAG
              • 313 Flow rate regulators VAH VRH
              • 314 Variable airgas ratio control VAV
              • 315 Pressure regulator with gas solenoid valve VAxS position indicator with visual indicator
                • 32 Animation
                • 33 Connection diagram
                  • 331 VAx with M20 cable gland
                  • 332 VAx with plug
                  • 333 VAS with VADVAGVAHVAV with M20 cable gland
                  • 334 VAS with VADVAGVAHVAV with plug
                      • 4 Replacement possibilities for MODULINE pressure regulators with gas solenoid valve
                        • 41 GVS GVI GVIB GVR and GVRH are to be replaced by VAD VAG VAG+VAS VAH and VAV
                          • 5 Flow rate
                            • 51 Selection example for VAD
                              • 511 Calculate VAD
                                • 52 Selection example for VAG VAH VRH VAV
                                  • 521 CalculateVAG VxHVAV
                                    • 53 Selection example for zero governor VAGN
                                      • 531 Calculate VAGN
                                          • 6 Selection
                                            • 61 Selection table for pressure regulator with solenoid valve VAD
                                            • 62 Type code for VAD
                                            • 63 Selection table for airgas ratio control with solenoid valve VAG flow rate regulators VAH VRH
                                            • 64 Type code for VAG VAH VRH
                                            • 65 Selection table for variable airgas ratio control with solenoid valve VAV
                                            • 66 Type code for VAV
                                            • 67 Accessories
                                              • 7 Project planning information
                                                • 71 Installation
                                                  • 711 Installation position
                                                    • 72 Setting the low-fire rate on VAG VAH VRH VAV
                                                    • 73 Setting the high-fire rate on VAV
                                                      • 731 Calculation
                                                          • 8 Accessories
                                                            • 81 Gas pressure switch DGVC for VAx VRH
                                                            • 82 Gas pressure switch DGVCT for VAxT VRHT
                                                            • 83 Bypass valvepilot gas valve VAS 1
                                                              • 831 VAS 1 attached to VADVAGVAHVAV 1
                                                              • 832 VAS 1 attached to VADVAGVAHVAV 2 VADVAGVAHVAV 3
                                                              • 833 Flow rate
                                                                • 84 Bypass valvepilot gas valve VBY 8 for VADVAGVAHVAV 1
                                                                  • 841 Scope of delivery VBY 8I as bypass valve
                                                                  • 842 Scope of delivery VBY 8R as pilot gas valve
                                                                  • 843 Selection
                                                                  • 844 Type code
                                                                  • 845 Flow rate
                                                                  • 846 Technical data
                                                                    • 85 Tightness control TC 116V
                                                                    • 86 Pressure test points
                                                                    • 87 Cable gland set
                                                                    • 88 Seal set VA 1thinspndashthinsp3
                                                                    • 89 Differential pressure orifice
                                                                    • 810 Retaining frame
                                                                    • 811 Attachment block
                                                                    • 812 Gas control line
                                                                    • 813 Measuring orifice VMO
                                                                    • 814 Filter module VMF
                                                                    • 815 Fine-adjusting valve VMV
                                                                      • 9 Technical data
                                                                        • 91 VAD
                                                                        • 92 VAG
                                                                        • 93 VAH VRH
                                                                        • 94 VAV
                                                                        • 95 Safety-specific characteristic values for VAx 1thinspndashthinsp3
                                                                          • 951 Determining the PFHD value the λD value and the MTTFd value
                                                                          • 952 Calculating the PFHD and PFDavg
                                                                            • 96 Dimensions
                                                                              • 10 Converting units
                                                                              • 11 Maintenance cycles
                                                                              • 12 Glossary
                                                                                • 121 Diagnostic coverage DC
                                                                                • 122 Mode of operation
                                                                                • 123 Category
                                                                                • 124 Common cause failure CCF
                                                                                • 125 Fraction of undetected common cause failures β
                                                                                • 126 B10d value
                                                                                • 127 T10d value
                                                                                • 128 Hardware fault tolerance HFT
                                                                                • 129 Mean dangerous failure rate λD
                                                                                • 1210 Safe failure fraction SFF
                                                                                • 1211 Probability of dangerous failure PFHD
                                                                                • 1212 Mean time to dangerous failure MTTFd
                                                                                • 1213 Demand rate nop
                                                                                • 1214 Average probability of dangerous failure on demand PFDavg
                                                                                  • Feedback
                                                                                  • Contact
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                                                                                      9. fbArbeitspunkt_Min Ja
                                                                                      10. fbArbeitspunkt Ja
                                                                                      11. ftProgramm Standard-Programm
                                                                                      12. fz_kv
                                                                                      13. fz_pe 80
                                                                                      14. fz_pG 60
                                                                                      15. fzDelta_p_Soll 20
                                                                                      16. ftEinheit_Druck mbar
                                                                                      17. fatTyp [115]
                                                                                      18. fbArbeitspunkt_Min_2 Ja
                                                                                      19. fbArbeitspunkt_2 Ja
                                                                                      20. ftRegler_Typ VAG
                                                                                      21. ftProgramm_2 Standard-Programm
                                                                                      22. fz_kv_2
                                                                                      23. fatMedium [08]
                                                                                      24. fzDichte 08
                                                                                      25. ftEinheit_Dichte kgm3
                                                                                      26. fzV_Norm 30
                                                                                      27. ftEinheit_Volstrom m3h
                                                                                      28. fz_pe_2 80
                                                                                      29. fz_pG_2 60
                                                                                      30. fzDelta_p_Soll_2 20
                                                                                      31. ftEinheit_Druck2 [mbar]
                                                                                      32. ftEinheit_Geschw [ms]
                                                                                      33. fatTyp_2 [10954451150103322]
                                                                                      34. fbArbeitspunkt_Min_3 Ja
                                                                                      35. fbArbeitspunkt_3 Ja
                                                                                      36. ftProgramm_3 Standard-Programm
                                                                                      37. fz_kv_3
                                                                                      38. fz_pe_3 20
                                                                                      39. fz_pG_3 0
                                                                                      40. fzDelta_p_Soll_3 20
                                                                                      41. fatTyp_3 [123]
                                                                                      42. fatSchaltleistung [6363683]
                                                                                      43. fz_nop_Stunde 1
                                                                                      44. fz_nop_Jahr 8760
                                                                                      45. fzZyklus 3600
                                                                                      46. fzB10d 6363683
                                                                                      47. fzT10d 10
                                                                                      48. fzPFHd_1V 15714170551864384e-8
                                                                                      49. fzPFDavg_1V
                                                                                      50. ftGeeignet_1V PL d SIL 2
                                                                                      51. fzPFHd_2V 33505832253532625e-10
                                                                                      52. fzPFDavg_2V
                                                                                      53. ftGeeignet_2V PL e SIL 3
                                                                                      54. ftUebersicht Off
                                                                                      55. ftVerstaendlichkeit Off
                                                                                      56. ftFehlende_Info
                                                                                      57. ftUmfang Off
                                                                                      58. ftVerwendung_1 Off
                                                                                      59. ftVerwendung_2 Off
                                                                                      60. ftVerwendung_3 Off
                                                                                      61. ftVerwendung_4 Off
                                                                                      62. ftNavigation Off
                                                                                      63. ftTaetigkeitsbereich Off
                                                                                      64. ftBemerkung
                                                                                      65. Michael Rehkamp Elster Kromschroumlder>btnSenden
Page 37: VAD, VAG, VAV, VAH, VRH, VCD, VCG, VCV, VCH · PDF fileVAD, VAG, VAH, VAV, VRH, VCD, VCG, VCV, VCH · Edition 04.15 6 VAD VAD VAS 1 .1 Examples of application 1 .1 .1 Constant pressure

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 37

pu pd

21579

4836

085310

189

142

8 Accessories8 1 Gas pressure switch DG VC for VAx VRHType Adjusting range [mbar]DG 17VC 2 to 17DG 40VC 5 to 40DG 110VC 30 to 110DG 300VC 100 to 300

Scope of delivery 1 times pressure switch for gas 2 times retaining screws 2 times sealing rings

8 2 Gas pressure switch DG VCT for VAx T VRH TType Adjusting range [WC]DG 17VCT 08 to 68DG 40VCT 2 to 16DG 110VCT 12 to 44DG 300VCT 40 to 120

Scope of delivery 1 times gas pressure switch with AWG 18 connection wires 2 times retaining screws 2 times sealing ringsMonitoring the inlet pressure pu the electrical plug of the pressure switch for gas points towards the inlet flangeMonitoring the outlet pressure pd the electrical plug of the pressure switch for gas points towards the outlet flange

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 38

A BC

D

FE

ACD

F

B

E

8 3 Bypass valvepilot gas valve VAS 18 3 1 VAS 1 attached to VADVAGVAHVAV 1Scope of delivery A 1 times bypasspilot gas valve VAS 1 B 4 times O-rings C 4 times double nuts D 4 times connection parts E 1 times mounting aidBypass valve VAS 1 F 2 times connection pipes if the bypass valve has a blind flange

at the outlet sidePilot gas valve VAS 1 F 1 times connection pipe 1 times sealing plug if the pilot gas valve

has a threaded flange at the outlet side

Accessories

8 3 2 VAS 1 attached to VADVAGVAHVAV 2 VADVAGVAHVAV 3Scope of delivery A 1 times bypasspilot gas valve VAS 1 B 4 times O-rings C 4 times spacer sleeves D 4 times connection parts E 1 times mounting aidBypass valve VAS 1 F 2 times connection pipes if the bypass valve has a blind flange

at the outlet sidePilot gas valve VAS 1 F 1 times connection pipe 1 times sealing plug if the pilot gas valve

has a threaded flange at the outlet side

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 39

2

3

456

810

20

30

405060

80100

∆p [m

bar]

005 01 02 03 05 08 1 2 3 4 51

3

2

Qn [m3h]

1

01

02

03

0405

08

003

002

6 8 10

005 01 02 03 05 08 1 2 3 4 5003 6 8 10

20

005 01 02 03 05 08 1 2 3 4 5003 6 8 10 20

30

∆p [i

nch

WC]

1

2

3

456

810

20

30

40

04

004

006

00801

02

03

0506

08

Qn [SCFH]10 40 60 100 200 3001 500 10002 3 4 5

120 306 8

21 3 4 5 6 7 8 910

8 3 3 Flow rate

The characteristic flow rate curves have been measured for bypass valve VAS 1 with connection pipe diameter 1 to 10 mm (004 to 04) and for the pilot gas valve with 10 mm (04) connection pipe

Bypass valve connection pipe diameter [mm]

Pilo

t gas

val

ve 1

0 m

m (0

4)

conn

ectio

n pi

pe d

iam

eter

Accessories gt Bypass valvepilot gas valve VAS 1

= natural gas (ρ = 080 kgm3) = propane (ρ = 201 kgm3) = air (ρ = 129 kgm3)

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 40

Accessories

8 4 Bypass valvepilot gas valve VBY 8 for VADVAGVAHVAV 1

B

C

AVBY 8

VAx 1

55

(217)40(157)

70 (276)

80(315)

Rp frac14(pilot gas valve)

For mounting on VAD VAG VAH VAV 1 and double solenoid valve VCD VCG VCH VCV 1

8 4 1 Scope of delivery VBY 8I as bypass valveA 1 times bypass valve VBY 8IB 2 times retaining screws with 4 times O-rings both retaining screws

have a bypass orificeC 1 times grease for o-rings

8 4 2 Scope of delivery VBY 8R as pilot gas valveA 1 times pilot gas valve VBY 8RB 2 times retaining screws with 5 x O-rings one retaining screw

has a bypass orifice (2 x O-rings) the other does not (3 x O-rings)

C 1 times grease for O-rings

8 4 3 SelectionType I R W Q K 6L -R -L E B D 05

VBY 8

Order exampleVBY 8RW6L-LED

8 4 4 Type codeCode DescriptionVBY Gas solenoid valve8 Nominal sizeIR

For internal gas pick-up as bypass valveFor external gas pick-up as pilot gas valve

KQW

Mains voltage 24 V DC Mains voltage 120 V AC 5060 HzMains voltage 230 V AC 5060 Hz

6L Electrical connection via plug and socket with LED-R-L

Attachment side of main valve right-hand sideAttachment side of main valve left-hand side

EB

Attached to the VAxEnclosed (separate packing unit)

05D

Nozzle diameter = 05 mm (002)Flow adjustment

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 41

2

01

02

03

05

081

3

456

810

20

30

405060

80100

∆p [m

bar]

1

3

201 02 03 05 1 2 3001 003 4

Qn [m3h]

02 03 05 1 2

01 02 05

002 006

002

002 006 1

0010006 005 01

001

0003

0006 2 3

VBY 8DVBY 805

∆p [i

nch

WC]

1

2

3

456

810

20

30

40

040506

08

1

Qn [SCFH]10 40 60 1005 2081 2 30402

01

02

03

004005006

008

Adjusting range

8 4 5 Flow rateVBY 8 D

+

-

The flow rate can be set by turning the flow rate restrictor (4 mm016 Allen screw) frac14 of a turn Flow rate 10 to 100

VBY 8 05The flow is routed through a 05 mm (002) nozzle and thus has a fixed characteristic flow rate curve Adjustment is not possible

8 4 6 Technical dataInlet pressure pu max 500 mbar (7 psig)Ambient temperature 0 to +60degC (32 to 140degF) no condensation permittedStorage temperature 0 to +40degC (32 to 104degF) no condensation permittedPower consumption 24 V = 8 W 120 V = 8 W 230 V = 95 WEnclosure IP 54

Accessories gt Bypass valvepilot gas valve VBY 8 for VADVAGVAHVAV 1

= natural gas (ρ = 080 kgm3) = propane (ρ = 201 kgm3) = air (ρ = 129 kgm3)

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 42

TC 116VB C

56(22)

49(193)

27(106)

A

A

VCx 1 VCx 2VCx 3

8 5 Tightness control TC 116Vfor VAx 1 ndash 3An adapter plate is required to attach the tightness control to the right- or left-hand side of the pressure regulator with gas solenoid valveScope of delivery A 1 times adapter plate B 2 times O-rings C 2 times retaining screwsFor attachment to left-hand side Order No 74922391 right-hand side Order No 74921995

8 6 Pressure test pointsTest points to check the inlet pressure pu and outlet pressure pdScope of delivery 1 x pressure test points with 1 x profiled sealing rings Order No 74923390

8 7 Cable gland setWhen wiring a double solenoid valve with pressure regula-tor VCx the connection boxes are to be connected using a cable gland setThe cable gland set can only be used if the connection boxes are at the same height and on the same side and if both valves are equipped either with or without a proof of closure switchVA 1 Order No 74921985 VA 2 Order No 74921986 VA 3 Order No 74921987

Accessories

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 43

A B

D

C

Accessories

8 9 Differential pressure orifice

Size PipeDN

Differential pressure orifi cewith outlet dia

1 15 17 mm 0671 20 25 mm 0981 25 30 mm 1182 40 46 mm 1813 50 58 mm 228

If pressure regulator VADVAGVAV 1 is retrofitted upstream of gas solenoid valve VAS 1 a DN 25 differential pressure orifice with outlet opening d = 30 mm (118) must be inserted at the outlet of the pressure regulatorIn the case of pressure regulator VAx 115 or VAx 120 the DN 25 differential pressure orifice must be ordered separately and retrofitted Order No 74922240

8 8 Seal set VA 1 ndash 3VA 1 Order No 74921988 VA 2 Order No 74921989 VA 3 Order No 74921990Scope of deliveryA 1 times double block seal B 2 times O-rings (flange) C 2 times O-rings (pressure switch) for pressure test pointscrew plug D 2 times sealing rings (flat sealing) and 2 times profiled sealing rings

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 44

BA

C

pd-

8 11 Attachment blockFor locked installation of pressure gauge and other acces-soriesScope of delivery A 1 times attachment block B 2 times self-tapping screws for installation C 2 times O-rings

Accessories

8 10 Retaining frameIn the event that a pressure regulator VAx is installed at a later point upstream of a gas solenoid valve VAS a measur-ing orifice VMO or a fine-adjusting valve VMV the retaining frame must be fitted at the inlet of the second device in order to fasten the differential pressure orifice at the regulator outlet Order the retaining frame separatelyRetaining frame for Size 1 Order No 74923029 Size 2 Order No 74923030 Size 3 Order No 74923031

8 12 Gas control lineFine-adjusting valve VMV can be installed on the flow rate regulator VAH for fine adjustment of the gas flow rateThe gas control line for gas outlet pressure pd- is available with 2 18 compression fittingsSize 1 Order No 74924458 Size 2 Order No 74924459

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 45

8 13 Measuring orifice VMOThe measuring orifice VMO is designed to reduce the gas and air flow rates and is installed downstream of the valVario control The measuring orifice is available with Rp internal thread (NPT internal thread) or flange to ISO 7005See wwwdocuthekcom Elster Kromschroumlder Krom-schroumlder LBE Products 03 Valves and butterfly valves valVario accessories Type of document Technical Informa-tion VMO

Accessories

8 14 Filter module VMFUsing the filter module VMF the gas flow upstream of the gas solenoid valve VAS and the airgas ratio control is cleaned The filter module is available with Rp internal thread (NPT internal thread) or flange to ISO 7005 and can also be supplied with fitted pressure switch as an optionSee wwwdocuthekcom Elster Kromschroumlder Krom-schroumlder LBE Products 03 Valves and butterfly valves valVario accessories Type of document Technical Informa-tion VMF

8 15 Fine-adjusting valve VMVThe flow rate is set using the fine-adjusting valve VMV The fine-adjusting valve is available with Rp internal thread (NPT internal thread) or flange to ISO 7005See wwwdocuthekcom Elster Kromschroumlder Krom-schroumlder LBE Products 03 Valves and butterfly valves valVario accessories Type of document Technical Infor-mation VMV

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 46

9 Technical dataGas types natural gas LPG (gaseous) biologically produced methane (max 01 -by-vol H2S) or clean air other gases on request The gas must be clean and dry in all temperature conditions and must not contain condensateCE and FM approved UL listed max inlet pressure pu 10 ndash 500 mbar (4 ndash 200 WC) FM approved (230 V AC 120 V AC 24 V DC) non opera-tional pressure 700 mbar (10 psig)ANSICSA approved (230 V AC 120 V AC 24 V DC) up to 350 mbar (5 psig)Opening time of the solenoid valve quick opening le 05 s Closing time quick closing lt 1 sMedium and ambient temperatures -20 to +60degC (-4 to +140degF) no condensation permittedStorage temperature -20 to +40degC (-4 to +104degF)Enclosure IP 65Valve housing aluminium valve seal NBRConnection flanges with internal thread Rp to ISO 7-1 NPT to ANSIASMESafety valve Class A to EN 161 Factory Mutual Research Class 7400 Process Control Valves (230 V AC 120 V AC 24 V DC) ANSI Z2121 and CSA 65 ANSI Z2118 and CSA 63Control class A to EN 88-1Control range up to 101

Mains voltage 230 V AC +10-15 5060 Hz 200 V AC +10-15 5060 Hz 120 V AC +10-15 5060 Hz 100 V AC +10-15 5060 Hz 24 V DC plusmn20Duty cycle 100Power factor of the solenoid coil cos φ = 09Power consumption

Type Voltage Power

VAx 1

24 V DC 25 W ndash100 V AC 25 W (26 VA)120 V AC 25 W (26 VA)200 V AC 25 W (26 VA)230 V AC 25 W (26 VA)

VAx 2 VAx 3

24 V DC 36 W ndash100 V AC 36 W (40 VA)120 V AC 40 W (44 VA)200 V AC 40 W (44 VA)230 V AC 40 W (44 VA)

VBY24 V DC 8 W ndash

120 V AC 8 W ndash230 V AC 95 W ndash

Cable gland M20 times 15Electrical connection cable with max 25 mm2 (AWG 12) or plug with socket to EN 175301-803

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 47

Position indicator contact rating

Type Voltage Min current(resistive load)

Max current(resistive load)

VAxS VCxS 12 ndash 250 V AC 5060 Hz 100 mA 3 AVAxG VCxG 12 ndash 30 V DC 2 mA 01 A

Position indicator switching frequency max 5 times per minute

Switching current [A]

Switching cyclescos φ = 1 cos φ = 06

01 500000 50000005 300000 250000

1 200000 1000003 100000 ndash

Limited to max 200000 cycles for heating systems

9 1 VADOutlet pressure pd VAD-25 25 ndash 25 mbar (1 ndash 10 WC) VAD-50 20 ndash 50 mbar (8 ndash 20 WC) VAD-100 35 ndash 100 mbar (14 ndash 40 WC)Combustion chamber control pressure psc (connection psa)

-20 to +20 mbar (-78 to +78 WC)

VAD

pu

pd

(psa)

9 2 VAGOutlet pressure pd 05 ndash 100 mbar (02 ndash 40 WC)Air control pressure psa 05 ndash 100 mbar (02 ndash 40 WC)

Adjusting range at low fire plusmn5 mbar (plusmn2 WC)Transmission ratio of gas to air 11The inlet pressure must always be higher than the air control pressure psa + pressure loss ∆p + 5 mbar (2 WC)

VAGpd

pu

psa

psa

VAGK 1 x 18 coupling for plastic hose (internal dia 39 mm (015) external dia 61 mm (024)) or VAGE 1 x 18 compression fitting for 6 times 1 tube or VAGA 1 x NPT 18 adapter or VAGN zero governor with breathing orifice

9 3 VAH VRHAir control pressure psa 06 ndash 100 mbar (024 ndash 40 WC) Differential air pressure ∆psa (psa - psa-) 06 ndash 50 mbar (024 ndash 197 WC) Differential gas pressure ∆pd (pd - pd-) 06 ndash 50 mbar (024 ndash 197 WC)Transmission ratio of gas to air 11The inlet pressure must always be higher than the differen-tial air pressure ∆psa + pressure loss ∆p + max gas pres-sure on burner + 5 mbar (2 WC)Adjusting range at low fire plusmn5 mbar (plusmn2 WC)

Technical data

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 48

VAHVRH

pd-

pu

psa-

psa

Connection of the air control pressure psaVAHE VRHE 3 x 18 compression fitting for 6 times 1 tube or VAHA VRHA 3 x NPT 18 adapter

9 4 VAVOutlet pressure pd 05 ndash 30 mbar (02 ndash 117 WC)Air control pressure psa 04 ndash 30 mbar (015 ndash 117 WC)Combustion chamber control pressure psc

-20 to +20 mbar (-78 to +78 WC)Min control pressure differential psa - psc 04 mbar (015 WC)Min pressure differential pd - psc 05 mbar (02 WC)Adjusting range at low fire plusmn15 mbar (plusmn06 WC)Transmission ratio of gas to air 061 to 31The inlet pressure pu must always be higher than the air control pressure psa times transmission ratio V + pressure loss ∆p + 15 mbar (06 WC)

pu

pd psapsc

VAV

VAVK 2 x plastic hose couplings (internal dia 39 mm (015) external dia 61 mm (024)) or VAVE 2 x 18 compression fitting for 6 times 1 tube or VAVA 2 x NPT 18 adapter

Technical data

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 49

9 5 Safety-specific characteristic values for VAx 1 ndash 3For SILSuitable for Safety Integrity Level SIL 1 2 3

Diagnostic coverage DC 0

Type of subsystem Type A to EN 61508-2 74312

Operating mode High demand mode pursu-ant to EN 61508-4 3512

For PLSuitable for Performance Level PL a b c d e

Category B 1 2 3 4Common cause failure CCF gt 65Application of essential safety requirements Satisfied

Application of tried-and-tested safety requirements Satisfied

For SIL and PL

B10d value

Operating cyclesVAD VAG VAV VAH 1 10094360VAD VAG VAV VAH 2 8229021VAD VAG VAV VAH 3 6363683

Hardware fault tolerance (1 valve) HFT 0

Hardware fault tolerance (2 valves) HFT 1

Safe failure fraction SFF gt 90Fraction of undetected com-mon cause failures β ge 2

Max service life under operating conditions10 years after date of production plus max 12 year in stor-age prior to first use or once the given number of operating cycles has been reached depending on which is achieved firstThe devices are suitable for single-channel systems (HFT = 0) up to SIL 2PL d and up to SIL 3PL e when two re-dundant valves are installed in a double-channel architecture (HFT = 1) provided that the complete system complies with the requirements of EN 61508ISO 13849

For a glossary of terms see page 53 (Glossary)

Technical data

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 50

nop 1hnop 1a

sB10d

T10d aPFHD (1 VAx) 1h

PFHD (2 VAx) 1h

PFDavg (1 VAx)

PFDavg (2 VAx)

Technical data gt Safety-specific characteristic values for VAx 1 ndash 3

9 5 1 Determining the PFHD value the λD value and the MTTFd value

PFHD = λD = x nop= 1MTTFd

01B10d

PFDavg = x λD x 24 x 365 x T10d 12

Type

Cycle time

suitable for

suitable for

PFHD = Probability of dangerous failure (HDM = high de-mand mode) [1hour]PFDavg = Average probability of dangerous failure on de-mand (LDM = low demand mode)λD = Mean dangerous failure rate [1hour]MTTFd = Mean time to dangerous failure [hours]nop = Demand rate (mean number of annual operations) [1hour]

9 5 2 Calculating the PFHD and PFDavg

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 51

VAD VAG VAH VAV

H1

Rp frac14(NPT frac14)

H2

E

LF

F

H4

H3

B

VAxS VAxF

L2G

G

Technical data

9 6 Dimensions

Type

Connec-tion Dimensions

WeightRpNPT DN

L L2 E F G H1 H2 H3 H4 Bmm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch kg lbs

VAx 115 12 15 75 29 ndash ndash 75 29 15 06 ndash ndash 143 56 82 32 161 63 117 46 97 38 18 40VAH 115 12 15 75 29 ndash ndash 75 29 15 06 ndash ndash 143 56 100 39 161 63 135 53 97 38 2 44VAx 120 34 20 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 82 33 161 63 117 46 97 38 19 42VAH 120 34 20 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 100 39 161 63 135 53 97 38 21 46VAx 125 1 25 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 82 33 161 63 117 46 97 38 19 42VAH 125 1 25 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 100 39 161 63 135 53 97 38 21 46VAx 240 112 40 128 50 200 79 85 33 29 11 66 26 170 67 112 44 191 75 162 64 125 49 44 97VAH 240 112 40 128 50 200 79 85 33 29 11 66 26 170 67 132 52 191 75 182 72 125 49 47 104VAx 350 2 50 155 61 230 91 85 33 36 14 74 29 180 70 135 53 201 79 196 77 160 63 61 134VAH 350 2 50 155 61 230 91 85 33 36 14 74 29 180 70 156 61 201 79 217 85 160 63 64 141

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 52

10 Converting unitssee wwwadlatusorg

11 Maintenance cyclesAt least once per annum at least twice per annum for biologi-cally produced methaneIf the flow rate drops clean the strainer

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 53

12 Glossary12 1 Diagnostic coverage DCMeasure of the effectiveness of diagnostics which may be determined as the ratio between the failure rate of detected dangerous failures and the failure rate of total dangerous failuresNOTE Diagnostic coverage can exist for the whole or parts of a safety-related system For example diagnostic cover-age could exist for sensors andor logic system andor final elements Unit see EN ISO 13849-12008

12 2 Mode of operationHigh demand mode or continuous modeOperating mode where the frequency of demands for opera-tion made on a safety-related system is greater than one per year or greater than twice the proof-test frequencysee EN 61508-42008

12 3 CategoryClassification of the safety-related parts of a control system in respect of their resistance to faults and their subsequent behaviour in the fault condition and which is achieved by the structural arrangement of the parts fault detection andor by their reliability see EN ISO 13849-12008

12 4 Common cause failure CCFFailures of different items resulting from a single event where these failures are not consequences of each othersee EN ISO 13849-12008

12 5 Fraction of undetected common cause failures β Fraction of undetected failures of redundant components due to a single event whereby these failures are not based on mutual causesNOTE β is expressed as a fraction in the equations and as a percentage elsewheresee EN 61508-62010

12 6 B10d valueMean number of cycles until 10 of the components fail dan-gerouslysee EN ISO 13849-12008

12 7 T10d valueMean time until 10 of the components fail dangerouslysee EN ISO 13849-12008

12 8 Hardware fault tolerance HFTA hardware fault tolerance of N means that N + 1 is the mini-mum number of faults that could cause a loss of the safety functionsee IEC 61508-22010

12 9 Mean dangerous failure rate λD Mean rate of dangerous failures during operation time (T10d) Unit 1hsee EN ISO 13849-12008

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 54

12 10 Safe failure fraction SFFFraction of safe failures related to all failures which are as-sumed to appearsee EN 13611A22011

12 11 Probability of dangerous failure PFHD Value describing the likelihood of dangerous failure per hour of a component for high demand mode or continuous mode Unit 1hsee EN 13611A22011

12 12 Mean time to dangerous failure MTTFd Expectation of the mean time to dangerous failuresee EN ISO 13849-12008

12 13 Demand rate nop Mean number of annual operationssee EN ISO 13849-12008

12 14 Average probability of dangerous failure on demand PFDavg (LDM = 1 ndash 10 switching cyclesyear)Average probability of a dangerous failure of the safety function on demand (LDM = low demand mode)see EN 61508-6

Glossary

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415

Finally we are offering you the opportunity to assess this ldquoTechnical Information (TI)rdquo and to give us your opinion so that we can improve our documents further and suit them to your needs

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Remarks

(Adobe Reader 7 or higher required) wwwadobecom

Elster GmbH Postfach 2809 middot 49018 Osnabruumlck Strotheweg 1 middot 49504 Lotte (Buumlren) GermanyT +49 541 1214-0 F +49 541 1214-370 infokromschroedercomwwwkromschroedercom

The current addresses of our international agents are available on the Internetwwwkromschroederdeindexphpid=718ampL=1

We reserve the right to make technical modifications in the interests of progressCopyright copy 2015 Elster GmbH All rights reserved

Contact

Feedback

0325

0530

  • Pressure regulators with solenoid valve VAD VAG VAV VAH
  • Flow rate regulator VRH
  • Pressure regulators with double solenoid valve VCD VCG VCV VCH
  • Contents
  • 1 Application
    • 11 Examples of application
      • 111 Constant pressure control
      • 112 Constant pressure control with two gas solenoid valves
      • 113 Constant pressure control with max pressure switch
      • 114 Constant pressure control with non-controlled pilot gas outlet
      • 115 Modulating control
      • 116 Modulating control with two gas solenoid valves
      • 117 Modulating control with two gas solenoid valves and inlet pressure switch
      • 118 HighLow control
      • 119 Zero pressure control
      • 1110 Staged flow rate control
      • 1111 Continuous or staged flow rate control
      • 1112 Modulating control with variable airgas ratio control with gas solenoid valve
      • 1113 Modulating control in residential heat generation
          • 2 Certification
          • 3 Function
            • 31 VAD VAG VAH VRH VAV
              • 311 Pressure regulator for gas VAD
              • 312 Airgas ratio control VAG
              • 313 Flow rate regulators VAH VRH
              • 314 Variable airgas ratio control VAV
              • 315 Pressure regulator with gas solenoid valve VAxS position indicator with visual indicator
                • 32 Animation
                • 33 Connection diagram
                  • 331 VAx with M20 cable gland
                  • 332 VAx with plug
                  • 333 VAS with VADVAGVAHVAV with M20 cable gland
                  • 334 VAS with VADVAGVAHVAV with plug
                      • 4 Replacement possibilities for MODULINE pressure regulators with gas solenoid valve
                        • 41 GVS GVI GVIB GVR and GVRH are to be replaced by VAD VAG VAG+VAS VAH and VAV
                          • 5 Flow rate
                            • 51 Selection example for VAD
                              • 511 Calculate VAD
                                • 52 Selection example for VAG VAH VRH VAV
                                  • 521 CalculateVAG VxHVAV
                                    • 53 Selection example for zero governor VAGN
                                      • 531 Calculate VAGN
                                          • 6 Selection
                                            • 61 Selection table for pressure regulator with solenoid valve VAD
                                            • 62 Type code for VAD
                                            • 63 Selection table for airgas ratio control with solenoid valve VAG flow rate regulators VAH VRH
                                            • 64 Type code for VAG VAH VRH
                                            • 65 Selection table for variable airgas ratio control with solenoid valve VAV
                                            • 66 Type code for VAV
                                            • 67 Accessories
                                              • 7 Project planning information
                                                • 71 Installation
                                                  • 711 Installation position
                                                    • 72 Setting the low-fire rate on VAG VAH VRH VAV
                                                    • 73 Setting the high-fire rate on VAV
                                                      • 731 Calculation
                                                          • 8 Accessories
                                                            • 81 Gas pressure switch DGVC for VAx VRH
                                                            • 82 Gas pressure switch DGVCT for VAxT VRHT
                                                            • 83 Bypass valvepilot gas valve VAS 1
                                                              • 831 VAS 1 attached to VADVAGVAHVAV 1
                                                              • 832 VAS 1 attached to VADVAGVAHVAV 2 VADVAGVAHVAV 3
                                                              • 833 Flow rate
                                                                • 84 Bypass valvepilot gas valve VBY 8 for VADVAGVAHVAV 1
                                                                  • 841 Scope of delivery VBY 8I as bypass valve
                                                                  • 842 Scope of delivery VBY 8R as pilot gas valve
                                                                  • 843 Selection
                                                                  • 844 Type code
                                                                  • 845 Flow rate
                                                                  • 846 Technical data
                                                                    • 85 Tightness control TC 116V
                                                                    • 86 Pressure test points
                                                                    • 87 Cable gland set
                                                                    • 88 Seal set VA 1thinspndashthinsp3
                                                                    • 89 Differential pressure orifice
                                                                    • 810 Retaining frame
                                                                    • 811 Attachment block
                                                                    • 812 Gas control line
                                                                    • 813 Measuring orifice VMO
                                                                    • 814 Filter module VMF
                                                                    • 815 Fine-adjusting valve VMV
                                                                      • 9 Technical data
                                                                        • 91 VAD
                                                                        • 92 VAG
                                                                        • 93 VAH VRH
                                                                        • 94 VAV
                                                                        • 95 Safety-specific characteristic values for VAx 1thinspndashthinsp3
                                                                          • 951 Determining the PFHD value the λD value and the MTTFd value
                                                                          • 952 Calculating the PFHD and PFDavg
                                                                            • 96 Dimensions
                                                                              • 10 Converting units
                                                                              • 11 Maintenance cycles
                                                                              • 12 Glossary
                                                                                • 121 Diagnostic coverage DC
                                                                                • 122 Mode of operation
                                                                                • 123 Category
                                                                                • 124 Common cause failure CCF
                                                                                • 125 Fraction of undetected common cause failures β
                                                                                • 126 B10d value
                                                                                • 127 T10d value
                                                                                • 128 Hardware fault tolerance HFT
                                                                                • 129 Mean dangerous failure rate λD
                                                                                • 1210 Safe failure fraction SFF
                                                                                • 1211 Probability of dangerous failure PFHD
                                                                                • 1212 Mean time to dangerous failure MTTFd
                                                                                • 1213 Demand rate nop
                                                                                • 1214 Average probability of dangerous failure on demand PFDavg
                                                                                  • Feedback
                                                                                  • Contact
                                                                                      1. naechste_Seite 24
                                                                                      2. naechste Seite 18
                                                                                      3. naechste Seite 6
                                                                                      4. naechste Seite 16
                                                                                      5. naechste Seite 14
                                                                                      6. naechste Seite 25
                                                                                      7. naechste_Seite 11
                                                                                      8. naechste_Seite 17
                                                                                      9. fbArbeitspunkt_Min Ja
                                                                                      10. fbArbeitspunkt Ja
                                                                                      11. ftProgramm Standard-Programm
                                                                                      12. fz_kv
                                                                                      13. fz_pe 80
                                                                                      14. fz_pG 60
                                                                                      15. fzDelta_p_Soll 20
                                                                                      16. ftEinheit_Druck mbar
                                                                                      17. fatTyp [115]
                                                                                      18. fbArbeitspunkt_Min_2 Ja
                                                                                      19. fbArbeitspunkt_2 Ja
                                                                                      20. ftRegler_Typ VAG
                                                                                      21. ftProgramm_2 Standard-Programm
                                                                                      22. fz_kv_2
                                                                                      23. fatMedium [08]
                                                                                      24. fzDichte 08
                                                                                      25. ftEinheit_Dichte kgm3
                                                                                      26. fzV_Norm 30
                                                                                      27. ftEinheit_Volstrom m3h
                                                                                      28. fz_pe_2 80
                                                                                      29. fz_pG_2 60
                                                                                      30. fzDelta_p_Soll_2 20
                                                                                      31. ftEinheit_Druck2 [mbar]
                                                                                      32. ftEinheit_Geschw [ms]
                                                                                      33. fatTyp_2 [10954451150103322]
                                                                                      34. fbArbeitspunkt_Min_3 Ja
                                                                                      35. fbArbeitspunkt_3 Ja
                                                                                      36. ftProgramm_3 Standard-Programm
                                                                                      37. fz_kv_3
                                                                                      38. fz_pe_3 20
                                                                                      39. fz_pG_3 0
                                                                                      40. fzDelta_p_Soll_3 20
                                                                                      41. fatTyp_3 [123]
                                                                                      42. fatSchaltleistung [6363683]
                                                                                      43. fz_nop_Stunde 1
                                                                                      44. fz_nop_Jahr 8760
                                                                                      45. fzZyklus 3600
                                                                                      46. fzB10d 6363683
                                                                                      47. fzT10d 10
                                                                                      48. fzPFHd_1V 15714170551864384e-8
                                                                                      49. fzPFDavg_1V
                                                                                      50. ftGeeignet_1V PL d SIL 2
                                                                                      51. fzPFHd_2V 33505832253532625e-10
                                                                                      52. fzPFDavg_2V
                                                                                      53. ftGeeignet_2V PL e SIL 3
                                                                                      54. ftUebersicht Off
                                                                                      55. ftVerstaendlichkeit Off
                                                                                      56. ftFehlende_Info
                                                                                      57. ftUmfang Off
                                                                                      58. ftVerwendung_1 Off
                                                                                      59. ftVerwendung_2 Off
                                                                                      60. ftVerwendung_3 Off
                                                                                      61. ftVerwendung_4 Off
                                                                                      62. ftNavigation Off
                                                                                      63. ftTaetigkeitsbereich Off
                                                                                      64. ftBemerkung
                                                                                      65. Michael Rehkamp Elster Kromschroumlder>btnSenden
Page 38: VAD, VAG, VAV, VAH, VRH, VCD, VCG, VCV, VCH · PDF fileVAD, VAG, VAH, VAV, VRH, VCD, VCG, VCV, VCH · Edition 04.15 6 VAD VAD VAS 1 .1 Examples of application 1 .1 .1 Constant pressure

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 38

A BC

D

FE

ACD

F

B

E

8 3 Bypass valvepilot gas valve VAS 18 3 1 VAS 1 attached to VADVAGVAHVAV 1Scope of delivery A 1 times bypasspilot gas valve VAS 1 B 4 times O-rings C 4 times double nuts D 4 times connection parts E 1 times mounting aidBypass valve VAS 1 F 2 times connection pipes if the bypass valve has a blind flange

at the outlet sidePilot gas valve VAS 1 F 1 times connection pipe 1 times sealing plug if the pilot gas valve

has a threaded flange at the outlet side

Accessories

8 3 2 VAS 1 attached to VADVAGVAHVAV 2 VADVAGVAHVAV 3Scope of delivery A 1 times bypasspilot gas valve VAS 1 B 4 times O-rings C 4 times spacer sleeves D 4 times connection parts E 1 times mounting aidBypass valve VAS 1 F 2 times connection pipes if the bypass valve has a blind flange

at the outlet sidePilot gas valve VAS 1 F 1 times connection pipe 1 times sealing plug if the pilot gas valve

has a threaded flange at the outlet side

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 39

2

3

456

810

20

30

405060

80100

∆p [m

bar]

005 01 02 03 05 08 1 2 3 4 51

3

2

Qn [m3h]

1

01

02

03

0405

08

003

002

6 8 10

005 01 02 03 05 08 1 2 3 4 5003 6 8 10

20

005 01 02 03 05 08 1 2 3 4 5003 6 8 10 20

30

∆p [i

nch

WC]

1

2

3

456

810

20

30

40

04

004

006

00801

02

03

0506

08

Qn [SCFH]10 40 60 100 200 3001 500 10002 3 4 5

120 306 8

21 3 4 5 6 7 8 910

8 3 3 Flow rate

The characteristic flow rate curves have been measured for bypass valve VAS 1 with connection pipe diameter 1 to 10 mm (004 to 04) and for the pilot gas valve with 10 mm (04) connection pipe

Bypass valve connection pipe diameter [mm]

Pilo

t gas

val

ve 1

0 m

m (0

4)

conn

ectio

n pi

pe d

iam

eter

Accessories gt Bypass valvepilot gas valve VAS 1

= natural gas (ρ = 080 kgm3) = propane (ρ = 201 kgm3) = air (ρ = 129 kgm3)

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 40

Accessories

8 4 Bypass valvepilot gas valve VBY 8 for VADVAGVAHVAV 1

B

C

AVBY 8

VAx 1

55

(217)40(157)

70 (276)

80(315)

Rp frac14(pilot gas valve)

For mounting on VAD VAG VAH VAV 1 and double solenoid valve VCD VCG VCH VCV 1

8 4 1 Scope of delivery VBY 8I as bypass valveA 1 times bypass valve VBY 8IB 2 times retaining screws with 4 times O-rings both retaining screws

have a bypass orificeC 1 times grease for o-rings

8 4 2 Scope of delivery VBY 8R as pilot gas valveA 1 times pilot gas valve VBY 8RB 2 times retaining screws with 5 x O-rings one retaining screw

has a bypass orifice (2 x O-rings) the other does not (3 x O-rings)

C 1 times grease for O-rings

8 4 3 SelectionType I R W Q K 6L -R -L E B D 05

VBY 8

Order exampleVBY 8RW6L-LED

8 4 4 Type codeCode DescriptionVBY Gas solenoid valve8 Nominal sizeIR

For internal gas pick-up as bypass valveFor external gas pick-up as pilot gas valve

KQW

Mains voltage 24 V DC Mains voltage 120 V AC 5060 HzMains voltage 230 V AC 5060 Hz

6L Electrical connection via plug and socket with LED-R-L

Attachment side of main valve right-hand sideAttachment side of main valve left-hand side

EB

Attached to the VAxEnclosed (separate packing unit)

05D

Nozzle diameter = 05 mm (002)Flow adjustment

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 41

2

01

02

03

05

081

3

456

810

20

30

405060

80100

∆p [m

bar]

1

3

201 02 03 05 1 2 3001 003 4

Qn [m3h]

02 03 05 1 2

01 02 05

002 006

002

002 006 1

0010006 005 01

001

0003

0006 2 3

VBY 8DVBY 805

∆p [i

nch

WC]

1

2

3

456

810

20

30

40

040506

08

1

Qn [SCFH]10 40 60 1005 2081 2 30402

01

02

03

004005006

008

Adjusting range

8 4 5 Flow rateVBY 8 D

+

-

The flow rate can be set by turning the flow rate restrictor (4 mm016 Allen screw) frac14 of a turn Flow rate 10 to 100

VBY 8 05The flow is routed through a 05 mm (002) nozzle and thus has a fixed characteristic flow rate curve Adjustment is not possible

8 4 6 Technical dataInlet pressure pu max 500 mbar (7 psig)Ambient temperature 0 to +60degC (32 to 140degF) no condensation permittedStorage temperature 0 to +40degC (32 to 104degF) no condensation permittedPower consumption 24 V = 8 W 120 V = 8 W 230 V = 95 WEnclosure IP 54

Accessories gt Bypass valvepilot gas valve VBY 8 for VADVAGVAHVAV 1

= natural gas (ρ = 080 kgm3) = propane (ρ = 201 kgm3) = air (ρ = 129 kgm3)

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 42

TC 116VB C

56(22)

49(193)

27(106)

A

A

VCx 1 VCx 2VCx 3

8 5 Tightness control TC 116Vfor VAx 1 ndash 3An adapter plate is required to attach the tightness control to the right- or left-hand side of the pressure regulator with gas solenoid valveScope of delivery A 1 times adapter plate B 2 times O-rings C 2 times retaining screwsFor attachment to left-hand side Order No 74922391 right-hand side Order No 74921995

8 6 Pressure test pointsTest points to check the inlet pressure pu and outlet pressure pdScope of delivery 1 x pressure test points with 1 x profiled sealing rings Order No 74923390

8 7 Cable gland setWhen wiring a double solenoid valve with pressure regula-tor VCx the connection boxes are to be connected using a cable gland setThe cable gland set can only be used if the connection boxes are at the same height and on the same side and if both valves are equipped either with or without a proof of closure switchVA 1 Order No 74921985 VA 2 Order No 74921986 VA 3 Order No 74921987

Accessories

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 43

A B

D

C

Accessories

8 9 Differential pressure orifice

Size PipeDN

Differential pressure orifi cewith outlet dia

1 15 17 mm 0671 20 25 mm 0981 25 30 mm 1182 40 46 mm 1813 50 58 mm 228

If pressure regulator VADVAGVAV 1 is retrofitted upstream of gas solenoid valve VAS 1 a DN 25 differential pressure orifice with outlet opening d = 30 mm (118) must be inserted at the outlet of the pressure regulatorIn the case of pressure regulator VAx 115 or VAx 120 the DN 25 differential pressure orifice must be ordered separately and retrofitted Order No 74922240

8 8 Seal set VA 1 ndash 3VA 1 Order No 74921988 VA 2 Order No 74921989 VA 3 Order No 74921990Scope of deliveryA 1 times double block seal B 2 times O-rings (flange) C 2 times O-rings (pressure switch) for pressure test pointscrew plug D 2 times sealing rings (flat sealing) and 2 times profiled sealing rings

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 44

BA

C

pd-

8 11 Attachment blockFor locked installation of pressure gauge and other acces-soriesScope of delivery A 1 times attachment block B 2 times self-tapping screws for installation C 2 times O-rings

Accessories

8 10 Retaining frameIn the event that a pressure regulator VAx is installed at a later point upstream of a gas solenoid valve VAS a measur-ing orifice VMO or a fine-adjusting valve VMV the retaining frame must be fitted at the inlet of the second device in order to fasten the differential pressure orifice at the regulator outlet Order the retaining frame separatelyRetaining frame for Size 1 Order No 74923029 Size 2 Order No 74923030 Size 3 Order No 74923031

8 12 Gas control lineFine-adjusting valve VMV can be installed on the flow rate regulator VAH for fine adjustment of the gas flow rateThe gas control line for gas outlet pressure pd- is available with 2 18 compression fittingsSize 1 Order No 74924458 Size 2 Order No 74924459

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 45

8 13 Measuring orifice VMOThe measuring orifice VMO is designed to reduce the gas and air flow rates and is installed downstream of the valVario control The measuring orifice is available with Rp internal thread (NPT internal thread) or flange to ISO 7005See wwwdocuthekcom Elster Kromschroumlder Krom-schroumlder LBE Products 03 Valves and butterfly valves valVario accessories Type of document Technical Informa-tion VMO

Accessories

8 14 Filter module VMFUsing the filter module VMF the gas flow upstream of the gas solenoid valve VAS and the airgas ratio control is cleaned The filter module is available with Rp internal thread (NPT internal thread) or flange to ISO 7005 and can also be supplied with fitted pressure switch as an optionSee wwwdocuthekcom Elster Kromschroumlder Krom-schroumlder LBE Products 03 Valves and butterfly valves valVario accessories Type of document Technical Informa-tion VMF

8 15 Fine-adjusting valve VMVThe flow rate is set using the fine-adjusting valve VMV The fine-adjusting valve is available with Rp internal thread (NPT internal thread) or flange to ISO 7005See wwwdocuthekcom Elster Kromschroumlder Krom-schroumlder LBE Products 03 Valves and butterfly valves valVario accessories Type of document Technical Infor-mation VMV

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 46

9 Technical dataGas types natural gas LPG (gaseous) biologically produced methane (max 01 -by-vol H2S) or clean air other gases on request The gas must be clean and dry in all temperature conditions and must not contain condensateCE and FM approved UL listed max inlet pressure pu 10 ndash 500 mbar (4 ndash 200 WC) FM approved (230 V AC 120 V AC 24 V DC) non opera-tional pressure 700 mbar (10 psig)ANSICSA approved (230 V AC 120 V AC 24 V DC) up to 350 mbar (5 psig)Opening time of the solenoid valve quick opening le 05 s Closing time quick closing lt 1 sMedium and ambient temperatures -20 to +60degC (-4 to +140degF) no condensation permittedStorage temperature -20 to +40degC (-4 to +104degF)Enclosure IP 65Valve housing aluminium valve seal NBRConnection flanges with internal thread Rp to ISO 7-1 NPT to ANSIASMESafety valve Class A to EN 161 Factory Mutual Research Class 7400 Process Control Valves (230 V AC 120 V AC 24 V DC) ANSI Z2121 and CSA 65 ANSI Z2118 and CSA 63Control class A to EN 88-1Control range up to 101

Mains voltage 230 V AC +10-15 5060 Hz 200 V AC +10-15 5060 Hz 120 V AC +10-15 5060 Hz 100 V AC +10-15 5060 Hz 24 V DC plusmn20Duty cycle 100Power factor of the solenoid coil cos φ = 09Power consumption

Type Voltage Power

VAx 1

24 V DC 25 W ndash100 V AC 25 W (26 VA)120 V AC 25 W (26 VA)200 V AC 25 W (26 VA)230 V AC 25 W (26 VA)

VAx 2 VAx 3

24 V DC 36 W ndash100 V AC 36 W (40 VA)120 V AC 40 W (44 VA)200 V AC 40 W (44 VA)230 V AC 40 W (44 VA)

VBY24 V DC 8 W ndash

120 V AC 8 W ndash230 V AC 95 W ndash

Cable gland M20 times 15Electrical connection cable with max 25 mm2 (AWG 12) or plug with socket to EN 175301-803

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 47

Position indicator contact rating

Type Voltage Min current(resistive load)

Max current(resistive load)

VAxS VCxS 12 ndash 250 V AC 5060 Hz 100 mA 3 AVAxG VCxG 12 ndash 30 V DC 2 mA 01 A

Position indicator switching frequency max 5 times per minute

Switching current [A]

Switching cyclescos φ = 1 cos φ = 06

01 500000 50000005 300000 250000

1 200000 1000003 100000 ndash

Limited to max 200000 cycles for heating systems

9 1 VADOutlet pressure pd VAD-25 25 ndash 25 mbar (1 ndash 10 WC) VAD-50 20 ndash 50 mbar (8 ndash 20 WC) VAD-100 35 ndash 100 mbar (14 ndash 40 WC)Combustion chamber control pressure psc (connection psa)

-20 to +20 mbar (-78 to +78 WC)

VAD

pu

pd

(psa)

9 2 VAGOutlet pressure pd 05 ndash 100 mbar (02 ndash 40 WC)Air control pressure psa 05 ndash 100 mbar (02 ndash 40 WC)

Adjusting range at low fire plusmn5 mbar (plusmn2 WC)Transmission ratio of gas to air 11The inlet pressure must always be higher than the air control pressure psa + pressure loss ∆p + 5 mbar (2 WC)

VAGpd

pu

psa

psa

VAGK 1 x 18 coupling for plastic hose (internal dia 39 mm (015) external dia 61 mm (024)) or VAGE 1 x 18 compression fitting for 6 times 1 tube or VAGA 1 x NPT 18 adapter or VAGN zero governor with breathing orifice

9 3 VAH VRHAir control pressure psa 06 ndash 100 mbar (024 ndash 40 WC) Differential air pressure ∆psa (psa - psa-) 06 ndash 50 mbar (024 ndash 197 WC) Differential gas pressure ∆pd (pd - pd-) 06 ndash 50 mbar (024 ndash 197 WC)Transmission ratio of gas to air 11The inlet pressure must always be higher than the differen-tial air pressure ∆psa + pressure loss ∆p + max gas pres-sure on burner + 5 mbar (2 WC)Adjusting range at low fire plusmn5 mbar (plusmn2 WC)

Technical data

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 48

VAHVRH

pd-

pu

psa-

psa

Connection of the air control pressure psaVAHE VRHE 3 x 18 compression fitting for 6 times 1 tube or VAHA VRHA 3 x NPT 18 adapter

9 4 VAVOutlet pressure pd 05 ndash 30 mbar (02 ndash 117 WC)Air control pressure psa 04 ndash 30 mbar (015 ndash 117 WC)Combustion chamber control pressure psc

-20 to +20 mbar (-78 to +78 WC)Min control pressure differential psa - psc 04 mbar (015 WC)Min pressure differential pd - psc 05 mbar (02 WC)Adjusting range at low fire plusmn15 mbar (plusmn06 WC)Transmission ratio of gas to air 061 to 31The inlet pressure pu must always be higher than the air control pressure psa times transmission ratio V + pressure loss ∆p + 15 mbar (06 WC)

pu

pd psapsc

VAV

VAVK 2 x plastic hose couplings (internal dia 39 mm (015) external dia 61 mm (024)) or VAVE 2 x 18 compression fitting for 6 times 1 tube or VAVA 2 x NPT 18 adapter

Technical data

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 49

9 5 Safety-specific characteristic values for VAx 1 ndash 3For SILSuitable for Safety Integrity Level SIL 1 2 3

Diagnostic coverage DC 0

Type of subsystem Type A to EN 61508-2 74312

Operating mode High demand mode pursu-ant to EN 61508-4 3512

For PLSuitable for Performance Level PL a b c d e

Category B 1 2 3 4Common cause failure CCF gt 65Application of essential safety requirements Satisfied

Application of tried-and-tested safety requirements Satisfied

For SIL and PL

B10d value

Operating cyclesVAD VAG VAV VAH 1 10094360VAD VAG VAV VAH 2 8229021VAD VAG VAV VAH 3 6363683

Hardware fault tolerance (1 valve) HFT 0

Hardware fault tolerance (2 valves) HFT 1

Safe failure fraction SFF gt 90Fraction of undetected com-mon cause failures β ge 2

Max service life under operating conditions10 years after date of production plus max 12 year in stor-age prior to first use or once the given number of operating cycles has been reached depending on which is achieved firstThe devices are suitable for single-channel systems (HFT = 0) up to SIL 2PL d and up to SIL 3PL e when two re-dundant valves are installed in a double-channel architecture (HFT = 1) provided that the complete system complies with the requirements of EN 61508ISO 13849

For a glossary of terms see page 53 (Glossary)

Technical data

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 50

nop 1hnop 1a

sB10d

T10d aPFHD (1 VAx) 1h

PFHD (2 VAx) 1h

PFDavg (1 VAx)

PFDavg (2 VAx)

Technical data gt Safety-specific characteristic values for VAx 1 ndash 3

9 5 1 Determining the PFHD value the λD value and the MTTFd value

PFHD = λD = x nop= 1MTTFd

01B10d

PFDavg = x λD x 24 x 365 x T10d 12

Type

Cycle time

suitable for

suitable for

PFHD = Probability of dangerous failure (HDM = high de-mand mode) [1hour]PFDavg = Average probability of dangerous failure on de-mand (LDM = low demand mode)λD = Mean dangerous failure rate [1hour]MTTFd = Mean time to dangerous failure [hours]nop = Demand rate (mean number of annual operations) [1hour]

9 5 2 Calculating the PFHD and PFDavg

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 51

VAD VAG VAH VAV

H1

Rp frac14(NPT frac14)

H2

E

LF

F

H4

H3

B

VAxS VAxF

L2G

G

Technical data

9 6 Dimensions

Type

Connec-tion Dimensions

WeightRpNPT DN

L L2 E F G H1 H2 H3 H4 Bmm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch kg lbs

VAx 115 12 15 75 29 ndash ndash 75 29 15 06 ndash ndash 143 56 82 32 161 63 117 46 97 38 18 40VAH 115 12 15 75 29 ndash ndash 75 29 15 06 ndash ndash 143 56 100 39 161 63 135 53 97 38 2 44VAx 120 34 20 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 82 33 161 63 117 46 97 38 19 42VAH 120 34 20 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 100 39 161 63 135 53 97 38 21 46VAx 125 1 25 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 82 33 161 63 117 46 97 38 19 42VAH 125 1 25 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 100 39 161 63 135 53 97 38 21 46VAx 240 112 40 128 50 200 79 85 33 29 11 66 26 170 67 112 44 191 75 162 64 125 49 44 97VAH 240 112 40 128 50 200 79 85 33 29 11 66 26 170 67 132 52 191 75 182 72 125 49 47 104VAx 350 2 50 155 61 230 91 85 33 36 14 74 29 180 70 135 53 201 79 196 77 160 63 61 134VAH 350 2 50 155 61 230 91 85 33 36 14 74 29 180 70 156 61 201 79 217 85 160 63 64 141

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 52

10 Converting unitssee wwwadlatusorg

11 Maintenance cyclesAt least once per annum at least twice per annum for biologi-cally produced methaneIf the flow rate drops clean the strainer

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 53

12 Glossary12 1 Diagnostic coverage DCMeasure of the effectiveness of diagnostics which may be determined as the ratio between the failure rate of detected dangerous failures and the failure rate of total dangerous failuresNOTE Diagnostic coverage can exist for the whole or parts of a safety-related system For example diagnostic cover-age could exist for sensors andor logic system andor final elements Unit see EN ISO 13849-12008

12 2 Mode of operationHigh demand mode or continuous modeOperating mode where the frequency of demands for opera-tion made on a safety-related system is greater than one per year or greater than twice the proof-test frequencysee EN 61508-42008

12 3 CategoryClassification of the safety-related parts of a control system in respect of their resistance to faults and their subsequent behaviour in the fault condition and which is achieved by the structural arrangement of the parts fault detection andor by their reliability see EN ISO 13849-12008

12 4 Common cause failure CCFFailures of different items resulting from a single event where these failures are not consequences of each othersee EN ISO 13849-12008

12 5 Fraction of undetected common cause failures β Fraction of undetected failures of redundant components due to a single event whereby these failures are not based on mutual causesNOTE β is expressed as a fraction in the equations and as a percentage elsewheresee EN 61508-62010

12 6 B10d valueMean number of cycles until 10 of the components fail dan-gerouslysee EN ISO 13849-12008

12 7 T10d valueMean time until 10 of the components fail dangerouslysee EN ISO 13849-12008

12 8 Hardware fault tolerance HFTA hardware fault tolerance of N means that N + 1 is the mini-mum number of faults that could cause a loss of the safety functionsee IEC 61508-22010

12 9 Mean dangerous failure rate λD Mean rate of dangerous failures during operation time (T10d) Unit 1hsee EN ISO 13849-12008

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 54

12 10 Safe failure fraction SFFFraction of safe failures related to all failures which are as-sumed to appearsee EN 13611A22011

12 11 Probability of dangerous failure PFHD Value describing the likelihood of dangerous failure per hour of a component for high demand mode or continuous mode Unit 1hsee EN 13611A22011

12 12 Mean time to dangerous failure MTTFd Expectation of the mean time to dangerous failuresee EN ISO 13849-12008

12 13 Demand rate nop Mean number of annual operationssee EN ISO 13849-12008

12 14 Average probability of dangerous failure on demand PFDavg (LDM = 1 ndash 10 switching cyclesyear)Average probability of a dangerous failure of the safety function on demand (LDM = low demand mode)see EN 61508-6

Glossary

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415

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Remarks

(Adobe Reader 7 or higher required) wwwadobecom

Elster GmbH Postfach 2809 middot 49018 Osnabruumlck Strotheweg 1 middot 49504 Lotte (Buumlren) GermanyT +49 541 1214-0 F +49 541 1214-370 infokromschroedercomwwwkromschroedercom

The current addresses of our international agents are available on the Internetwwwkromschroederdeindexphpid=718ampL=1

We reserve the right to make technical modifications in the interests of progressCopyright copy 2015 Elster GmbH All rights reserved

Contact

Feedback

0325

0530

  • Pressure regulators with solenoid valve VAD VAG VAV VAH
  • Flow rate regulator VRH
  • Pressure regulators with double solenoid valve VCD VCG VCV VCH
  • Contents
  • 1 Application
    • 11 Examples of application
      • 111 Constant pressure control
      • 112 Constant pressure control with two gas solenoid valves
      • 113 Constant pressure control with max pressure switch
      • 114 Constant pressure control with non-controlled pilot gas outlet
      • 115 Modulating control
      • 116 Modulating control with two gas solenoid valves
      • 117 Modulating control with two gas solenoid valves and inlet pressure switch
      • 118 HighLow control
      • 119 Zero pressure control
      • 1110 Staged flow rate control
      • 1111 Continuous or staged flow rate control
      • 1112 Modulating control with variable airgas ratio control with gas solenoid valve
      • 1113 Modulating control in residential heat generation
          • 2 Certification
          • 3 Function
            • 31 VAD VAG VAH VRH VAV
              • 311 Pressure regulator for gas VAD
              • 312 Airgas ratio control VAG
              • 313 Flow rate regulators VAH VRH
              • 314 Variable airgas ratio control VAV
              • 315 Pressure regulator with gas solenoid valve VAxS position indicator with visual indicator
                • 32 Animation
                • 33 Connection diagram
                  • 331 VAx with M20 cable gland
                  • 332 VAx with plug
                  • 333 VAS with VADVAGVAHVAV with M20 cable gland
                  • 334 VAS with VADVAGVAHVAV with plug
                      • 4 Replacement possibilities for MODULINE pressure regulators with gas solenoid valve
                        • 41 GVS GVI GVIB GVR and GVRH are to be replaced by VAD VAG VAG+VAS VAH and VAV
                          • 5 Flow rate
                            • 51 Selection example for VAD
                              • 511 Calculate VAD
                                • 52 Selection example for VAG VAH VRH VAV
                                  • 521 CalculateVAG VxHVAV
                                    • 53 Selection example for zero governor VAGN
                                      • 531 Calculate VAGN
                                          • 6 Selection
                                            • 61 Selection table for pressure regulator with solenoid valve VAD
                                            • 62 Type code for VAD
                                            • 63 Selection table for airgas ratio control with solenoid valve VAG flow rate regulators VAH VRH
                                            • 64 Type code for VAG VAH VRH
                                            • 65 Selection table for variable airgas ratio control with solenoid valve VAV
                                            • 66 Type code for VAV
                                            • 67 Accessories
                                              • 7 Project planning information
                                                • 71 Installation
                                                  • 711 Installation position
                                                    • 72 Setting the low-fire rate on VAG VAH VRH VAV
                                                    • 73 Setting the high-fire rate on VAV
                                                      • 731 Calculation
                                                          • 8 Accessories
                                                            • 81 Gas pressure switch DGVC for VAx VRH
                                                            • 82 Gas pressure switch DGVCT for VAxT VRHT
                                                            • 83 Bypass valvepilot gas valve VAS 1
                                                              • 831 VAS 1 attached to VADVAGVAHVAV 1
                                                              • 832 VAS 1 attached to VADVAGVAHVAV 2 VADVAGVAHVAV 3
                                                              • 833 Flow rate
                                                                • 84 Bypass valvepilot gas valve VBY 8 for VADVAGVAHVAV 1
                                                                  • 841 Scope of delivery VBY 8I as bypass valve
                                                                  • 842 Scope of delivery VBY 8R as pilot gas valve
                                                                  • 843 Selection
                                                                  • 844 Type code
                                                                  • 845 Flow rate
                                                                  • 846 Technical data
                                                                    • 85 Tightness control TC 116V
                                                                    • 86 Pressure test points
                                                                    • 87 Cable gland set
                                                                    • 88 Seal set VA 1thinspndashthinsp3
                                                                    • 89 Differential pressure orifice
                                                                    • 810 Retaining frame
                                                                    • 811 Attachment block
                                                                    • 812 Gas control line
                                                                    • 813 Measuring orifice VMO
                                                                    • 814 Filter module VMF
                                                                    • 815 Fine-adjusting valve VMV
                                                                      • 9 Technical data
                                                                        • 91 VAD
                                                                        • 92 VAG
                                                                        • 93 VAH VRH
                                                                        • 94 VAV
                                                                        • 95 Safety-specific characteristic values for VAx 1thinspndashthinsp3
                                                                          • 951 Determining the PFHD value the λD value and the MTTFd value
                                                                          • 952 Calculating the PFHD and PFDavg
                                                                            • 96 Dimensions
                                                                              • 10 Converting units
                                                                              • 11 Maintenance cycles
                                                                              • 12 Glossary
                                                                                • 121 Diagnostic coverage DC
                                                                                • 122 Mode of operation
                                                                                • 123 Category
                                                                                • 124 Common cause failure CCF
                                                                                • 125 Fraction of undetected common cause failures β
                                                                                • 126 B10d value
                                                                                • 127 T10d value
                                                                                • 128 Hardware fault tolerance HFT
                                                                                • 129 Mean dangerous failure rate λD
                                                                                • 1210 Safe failure fraction SFF
                                                                                • 1211 Probability of dangerous failure PFHD
                                                                                • 1212 Mean time to dangerous failure MTTFd
                                                                                • 1213 Demand rate nop
                                                                                • 1214 Average probability of dangerous failure on demand PFDavg
                                                                                  • Feedback
                                                                                  • Contact
                                                                                      1. naechste_Seite 24
                                                                                      2. naechste Seite 18
                                                                                      3. naechste Seite 6
                                                                                      4. naechste Seite 16
                                                                                      5. naechste Seite 14
                                                                                      6. naechste Seite 25
                                                                                      7. naechste_Seite 11
                                                                                      8. naechste_Seite 17
                                                                                      9. fbArbeitspunkt_Min Ja
                                                                                      10. fbArbeitspunkt Ja
                                                                                      11. ftProgramm Standard-Programm
                                                                                      12. fz_kv
                                                                                      13. fz_pe 80
                                                                                      14. fz_pG 60
                                                                                      15. fzDelta_p_Soll 20
                                                                                      16. ftEinheit_Druck mbar
                                                                                      17. fatTyp [115]
                                                                                      18. fbArbeitspunkt_Min_2 Ja
                                                                                      19. fbArbeitspunkt_2 Ja
                                                                                      20. ftRegler_Typ VAG
                                                                                      21. ftProgramm_2 Standard-Programm
                                                                                      22. fz_kv_2
                                                                                      23. fatMedium [08]
                                                                                      24. fzDichte 08
                                                                                      25. ftEinheit_Dichte kgm3
                                                                                      26. fzV_Norm 30
                                                                                      27. ftEinheit_Volstrom m3h
                                                                                      28. fz_pe_2 80
                                                                                      29. fz_pG_2 60
                                                                                      30. fzDelta_p_Soll_2 20
                                                                                      31. ftEinheit_Druck2 [mbar]
                                                                                      32. ftEinheit_Geschw [ms]
                                                                                      33. fatTyp_2 [10954451150103322]
                                                                                      34. fbArbeitspunkt_Min_3 Ja
                                                                                      35. fbArbeitspunkt_3 Ja
                                                                                      36. ftProgramm_3 Standard-Programm
                                                                                      37. fz_kv_3
                                                                                      38. fz_pe_3 20
                                                                                      39. fz_pG_3 0
                                                                                      40. fzDelta_p_Soll_3 20
                                                                                      41. fatTyp_3 [123]
                                                                                      42. fatSchaltleistung [6363683]
                                                                                      43. fz_nop_Stunde 1
                                                                                      44. fz_nop_Jahr 8760
                                                                                      45. fzZyklus 3600
                                                                                      46. fzB10d 6363683
                                                                                      47. fzT10d 10
                                                                                      48. fzPFHd_1V 15714170551864384e-8
                                                                                      49. fzPFDavg_1V
                                                                                      50. ftGeeignet_1V PL d SIL 2
                                                                                      51. fzPFHd_2V 33505832253532625e-10
                                                                                      52. fzPFDavg_2V
                                                                                      53. ftGeeignet_2V PL e SIL 3
                                                                                      54. ftUebersicht Off
                                                                                      55. ftVerstaendlichkeit Off
                                                                                      56. ftFehlende_Info
                                                                                      57. ftUmfang Off
                                                                                      58. ftVerwendung_1 Off
                                                                                      59. ftVerwendung_2 Off
                                                                                      60. ftVerwendung_3 Off
                                                                                      61. ftVerwendung_4 Off
                                                                                      62. ftNavigation Off
                                                                                      63. ftTaetigkeitsbereich Off
                                                                                      64. ftBemerkung
                                                                                      65. Michael Rehkamp Elster Kromschroumlder>btnSenden
Page 39: VAD, VAG, VAV, VAH, VRH, VCD, VCG, VCV, VCH · PDF fileVAD, VAG, VAH, VAV, VRH, VCD, VCG, VCV, VCH · Edition 04.15 6 VAD VAD VAS 1 .1 Examples of application 1 .1 .1 Constant pressure

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 39

2

3

456

810

20

30

405060

80100

∆p [m

bar]

005 01 02 03 05 08 1 2 3 4 51

3

2

Qn [m3h]

1

01

02

03

0405

08

003

002

6 8 10

005 01 02 03 05 08 1 2 3 4 5003 6 8 10

20

005 01 02 03 05 08 1 2 3 4 5003 6 8 10 20

30

∆p [i

nch

WC]

1

2

3

456

810

20

30

40

04

004

006

00801

02

03

0506

08

Qn [SCFH]10 40 60 100 200 3001 500 10002 3 4 5

120 306 8

21 3 4 5 6 7 8 910

8 3 3 Flow rate

The characteristic flow rate curves have been measured for bypass valve VAS 1 with connection pipe diameter 1 to 10 mm (004 to 04) and for the pilot gas valve with 10 mm (04) connection pipe

Bypass valve connection pipe diameter [mm]

Pilo

t gas

val

ve 1

0 m

m (0

4)

conn

ectio

n pi

pe d

iam

eter

Accessories gt Bypass valvepilot gas valve VAS 1

= natural gas (ρ = 080 kgm3) = propane (ρ = 201 kgm3) = air (ρ = 129 kgm3)

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 40

Accessories

8 4 Bypass valvepilot gas valve VBY 8 for VADVAGVAHVAV 1

B

C

AVBY 8

VAx 1

55

(217)40(157)

70 (276)

80(315)

Rp frac14(pilot gas valve)

For mounting on VAD VAG VAH VAV 1 and double solenoid valve VCD VCG VCH VCV 1

8 4 1 Scope of delivery VBY 8I as bypass valveA 1 times bypass valve VBY 8IB 2 times retaining screws with 4 times O-rings both retaining screws

have a bypass orificeC 1 times grease for o-rings

8 4 2 Scope of delivery VBY 8R as pilot gas valveA 1 times pilot gas valve VBY 8RB 2 times retaining screws with 5 x O-rings one retaining screw

has a bypass orifice (2 x O-rings) the other does not (3 x O-rings)

C 1 times grease for O-rings

8 4 3 SelectionType I R W Q K 6L -R -L E B D 05

VBY 8

Order exampleVBY 8RW6L-LED

8 4 4 Type codeCode DescriptionVBY Gas solenoid valve8 Nominal sizeIR

For internal gas pick-up as bypass valveFor external gas pick-up as pilot gas valve

KQW

Mains voltage 24 V DC Mains voltage 120 V AC 5060 HzMains voltage 230 V AC 5060 Hz

6L Electrical connection via plug and socket with LED-R-L

Attachment side of main valve right-hand sideAttachment side of main valve left-hand side

EB

Attached to the VAxEnclosed (separate packing unit)

05D

Nozzle diameter = 05 mm (002)Flow adjustment

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 41

2

01

02

03

05

081

3

456

810

20

30

405060

80100

∆p [m

bar]

1

3

201 02 03 05 1 2 3001 003 4

Qn [m3h]

02 03 05 1 2

01 02 05

002 006

002

002 006 1

0010006 005 01

001

0003

0006 2 3

VBY 8DVBY 805

∆p [i

nch

WC]

1

2

3

456

810

20

30

40

040506

08

1

Qn [SCFH]10 40 60 1005 2081 2 30402

01

02

03

004005006

008

Adjusting range

8 4 5 Flow rateVBY 8 D

+

-

The flow rate can be set by turning the flow rate restrictor (4 mm016 Allen screw) frac14 of a turn Flow rate 10 to 100

VBY 8 05The flow is routed through a 05 mm (002) nozzle and thus has a fixed characteristic flow rate curve Adjustment is not possible

8 4 6 Technical dataInlet pressure pu max 500 mbar (7 psig)Ambient temperature 0 to +60degC (32 to 140degF) no condensation permittedStorage temperature 0 to +40degC (32 to 104degF) no condensation permittedPower consumption 24 V = 8 W 120 V = 8 W 230 V = 95 WEnclosure IP 54

Accessories gt Bypass valvepilot gas valve VBY 8 for VADVAGVAHVAV 1

= natural gas (ρ = 080 kgm3) = propane (ρ = 201 kgm3) = air (ρ = 129 kgm3)

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 42

TC 116VB C

56(22)

49(193)

27(106)

A

A

VCx 1 VCx 2VCx 3

8 5 Tightness control TC 116Vfor VAx 1 ndash 3An adapter plate is required to attach the tightness control to the right- or left-hand side of the pressure regulator with gas solenoid valveScope of delivery A 1 times adapter plate B 2 times O-rings C 2 times retaining screwsFor attachment to left-hand side Order No 74922391 right-hand side Order No 74921995

8 6 Pressure test pointsTest points to check the inlet pressure pu and outlet pressure pdScope of delivery 1 x pressure test points with 1 x profiled sealing rings Order No 74923390

8 7 Cable gland setWhen wiring a double solenoid valve with pressure regula-tor VCx the connection boxes are to be connected using a cable gland setThe cable gland set can only be used if the connection boxes are at the same height and on the same side and if both valves are equipped either with or without a proof of closure switchVA 1 Order No 74921985 VA 2 Order No 74921986 VA 3 Order No 74921987

Accessories

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 43

A B

D

C

Accessories

8 9 Differential pressure orifice

Size PipeDN

Differential pressure orifi cewith outlet dia

1 15 17 mm 0671 20 25 mm 0981 25 30 mm 1182 40 46 mm 1813 50 58 mm 228

If pressure regulator VADVAGVAV 1 is retrofitted upstream of gas solenoid valve VAS 1 a DN 25 differential pressure orifice with outlet opening d = 30 mm (118) must be inserted at the outlet of the pressure regulatorIn the case of pressure regulator VAx 115 or VAx 120 the DN 25 differential pressure orifice must be ordered separately and retrofitted Order No 74922240

8 8 Seal set VA 1 ndash 3VA 1 Order No 74921988 VA 2 Order No 74921989 VA 3 Order No 74921990Scope of deliveryA 1 times double block seal B 2 times O-rings (flange) C 2 times O-rings (pressure switch) for pressure test pointscrew plug D 2 times sealing rings (flat sealing) and 2 times profiled sealing rings

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 44

BA

C

pd-

8 11 Attachment blockFor locked installation of pressure gauge and other acces-soriesScope of delivery A 1 times attachment block B 2 times self-tapping screws for installation C 2 times O-rings

Accessories

8 10 Retaining frameIn the event that a pressure regulator VAx is installed at a later point upstream of a gas solenoid valve VAS a measur-ing orifice VMO or a fine-adjusting valve VMV the retaining frame must be fitted at the inlet of the second device in order to fasten the differential pressure orifice at the regulator outlet Order the retaining frame separatelyRetaining frame for Size 1 Order No 74923029 Size 2 Order No 74923030 Size 3 Order No 74923031

8 12 Gas control lineFine-adjusting valve VMV can be installed on the flow rate regulator VAH for fine adjustment of the gas flow rateThe gas control line for gas outlet pressure pd- is available with 2 18 compression fittingsSize 1 Order No 74924458 Size 2 Order No 74924459

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 45

8 13 Measuring orifice VMOThe measuring orifice VMO is designed to reduce the gas and air flow rates and is installed downstream of the valVario control The measuring orifice is available with Rp internal thread (NPT internal thread) or flange to ISO 7005See wwwdocuthekcom Elster Kromschroumlder Krom-schroumlder LBE Products 03 Valves and butterfly valves valVario accessories Type of document Technical Informa-tion VMO

Accessories

8 14 Filter module VMFUsing the filter module VMF the gas flow upstream of the gas solenoid valve VAS and the airgas ratio control is cleaned The filter module is available with Rp internal thread (NPT internal thread) or flange to ISO 7005 and can also be supplied with fitted pressure switch as an optionSee wwwdocuthekcom Elster Kromschroumlder Krom-schroumlder LBE Products 03 Valves and butterfly valves valVario accessories Type of document Technical Informa-tion VMF

8 15 Fine-adjusting valve VMVThe flow rate is set using the fine-adjusting valve VMV The fine-adjusting valve is available with Rp internal thread (NPT internal thread) or flange to ISO 7005See wwwdocuthekcom Elster Kromschroumlder Krom-schroumlder LBE Products 03 Valves and butterfly valves valVario accessories Type of document Technical Infor-mation VMV

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 46

9 Technical dataGas types natural gas LPG (gaseous) biologically produced methane (max 01 -by-vol H2S) or clean air other gases on request The gas must be clean and dry in all temperature conditions and must not contain condensateCE and FM approved UL listed max inlet pressure pu 10 ndash 500 mbar (4 ndash 200 WC) FM approved (230 V AC 120 V AC 24 V DC) non opera-tional pressure 700 mbar (10 psig)ANSICSA approved (230 V AC 120 V AC 24 V DC) up to 350 mbar (5 psig)Opening time of the solenoid valve quick opening le 05 s Closing time quick closing lt 1 sMedium and ambient temperatures -20 to +60degC (-4 to +140degF) no condensation permittedStorage temperature -20 to +40degC (-4 to +104degF)Enclosure IP 65Valve housing aluminium valve seal NBRConnection flanges with internal thread Rp to ISO 7-1 NPT to ANSIASMESafety valve Class A to EN 161 Factory Mutual Research Class 7400 Process Control Valves (230 V AC 120 V AC 24 V DC) ANSI Z2121 and CSA 65 ANSI Z2118 and CSA 63Control class A to EN 88-1Control range up to 101

Mains voltage 230 V AC +10-15 5060 Hz 200 V AC +10-15 5060 Hz 120 V AC +10-15 5060 Hz 100 V AC +10-15 5060 Hz 24 V DC plusmn20Duty cycle 100Power factor of the solenoid coil cos φ = 09Power consumption

Type Voltage Power

VAx 1

24 V DC 25 W ndash100 V AC 25 W (26 VA)120 V AC 25 W (26 VA)200 V AC 25 W (26 VA)230 V AC 25 W (26 VA)

VAx 2 VAx 3

24 V DC 36 W ndash100 V AC 36 W (40 VA)120 V AC 40 W (44 VA)200 V AC 40 W (44 VA)230 V AC 40 W (44 VA)

VBY24 V DC 8 W ndash

120 V AC 8 W ndash230 V AC 95 W ndash

Cable gland M20 times 15Electrical connection cable with max 25 mm2 (AWG 12) or plug with socket to EN 175301-803

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 47

Position indicator contact rating

Type Voltage Min current(resistive load)

Max current(resistive load)

VAxS VCxS 12 ndash 250 V AC 5060 Hz 100 mA 3 AVAxG VCxG 12 ndash 30 V DC 2 mA 01 A

Position indicator switching frequency max 5 times per minute

Switching current [A]

Switching cyclescos φ = 1 cos φ = 06

01 500000 50000005 300000 250000

1 200000 1000003 100000 ndash

Limited to max 200000 cycles for heating systems

9 1 VADOutlet pressure pd VAD-25 25 ndash 25 mbar (1 ndash 10 WC) VAD-50 20 ndash 50 mbar (8 ndash 20 WC) VAD-100 35 ndash 100 mbar (14 ndash 40 WC)Combustion chamber control pressure psc (connection psa)

-20 to +20 mbar (-78 to +78 WC)

VAD

pu

pd

(psa)

9 2 VAGOutlet pressure pd 05 ndash 100 mbar (02 ndash 40 WC)Air control pressure psa 05 ndash 100 mbar (02 ndash 40 WC)

Adjusting range at low fire plusmn5 mbar (plusmn2 WC)Transmission ratio of gas to air 11The inlet pressure must always be higher than the air control pressure psa + pressure loss ∆p + 5 mbar (2 WC)

VAGpd

pu

psa

psa

VAGK 1 x 18 coupling for plastic hose (internal dia 39 mm (015) external dia 61 mm (024)) or VAGE 1 x 18 compression fitting for 6 times 1 tube or VAGA 1 x NPT 18 adapter or VAGN zero governor with breathing orifice

9 3 VAH VRHAir control pressure psa 06 ndash 100 mbar (024 ndash 40 WC) Differential air pressure ∆psa (psa - psa-) 06 ndash 50 mbar (024 ndash 197 WC) Differential gas pressure ∆pd (pd - pd-) 06 ndash 50 mbar (024 ndash 197 WC)Transmission ratio of gas to air 11The inlet pressure must always be higher than the differen-tial air pressure ∆psa + pressure loss ∆p + max gas pres-sure on burner + 5 mbar (2 WC)Adjusting range at low fire plusmn5 mbar (plusmn2 WC)

Technical data

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 48

VAHVRH

pd-

pu

psa-

psa

Connection of the air control pressure psaVAHE VRHE 3 x 18 compression fitting for 6 times 1 tube or VAHA VRHA 3 x NPT 18 adapter

9 4 VAVOutlet pressure pd 05 ndash 30 mbar (02 ndash 117 WC)Air control pressure psa 04 ndash 30 mbar (015 ndash 117 WC)Combustion chamber control pressure psc

-20 to +20 mbar (-78 to +78 WC)Min control pressure differential psa - psc 04 mbar (015 WC)Min pressure differential pd - psc 05 mbar (02 WC)Adjusting range at low fire plusmn15 mbar (plusmn06 WC)Transmission ratio of gas to air 061 to 31The inlet pressure pu must always be higher than the air control pressure psa times transmission ratio V + pressure loss ∆p + 15 mbar (06 WC)

pu

pd psapsc

VAV

VAVK 2 x plastic hose couplings (internal dia 39 mm (015) external dia 61 mm (024)) or VAVE 2 x 18 compression fitting for 6 times 1 tube or VAVA 2 x NPT 18 adapter

Technical data

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 49

9 5 Safety-specific characteristic values for VAx 1 ndash 3For SILSuitable for Safety Integrity Level SIL 1 2 3

Diagnostic coverage DC 0

Type of subsystem Type A to EN 61508-2 74312

Operating mode High demand mode pursu-ant to EN 61508-4 3512

For PLSuitable for Performance Level PL a b c d e

Category B 1 2 3 4Common cause failure CCF gt 65Application of essential safety requirements Satisfied

Application of tried-and-tested safety requirements Satisfied

For SIL and PL

B10d value

Operating cyclesVAD VAG VAV VAH 1 10094360VAD VAG VAV VAH 2 8229021VAD VAG VAV VAH 3 6363683

Hardware fault tolerance (1 valve) HFT 0

Hardware fault tolerance (2 valves) HFT 1

Safe failure fraction SFF gt 90Fraction of undetected com-mon cause failures β ge 2

Max service life under operating conditions10 years after date of production plus max 12 year in stor-age prior to first use or once the given number of operating cycles has been reached depending on which is achieved firstThe devices are suitable for single-channel systems (HFT = 0) up to SIL 2PL d and up to SIL 3PL e when two re-dundant valves are installed in a double-channel architecture (HFT = 1) provided that the complete system complies with the requirements of EN 61508ISO 13849

For a glossary of terms see page 53 (Glossary)

Technical data

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 50

nop 1hnop 1a

sB10d

T10d aPFHD (1 VAx) 1h

PFHD (2 VAx) 1h

PFDavg (1 VAx)

PFDavg (2 VAx)

Technical data gt Safety-specific characteristic values for VAx 1 ndash 3

9 5 1 Determining the PFHD value the λD value and the MTTFd value

PFHD = λD = x nop= 1MTTFd

01B10d

PFDavg = x λD x 24 x 365 x T10d 12

Type

Cycle time

suitable for

suitable for

PFHD = Probability of dangerous failure (HDM = high de-mand mode) [1hour]PFDavg = Average probability of dangerous failure on de-mand (LDM = low demand mode)λD = Mean dangerous failure rate [1hour]MTTFd = Mean time to dangerous failure [hours]nop = Demand rate (mean number of annual operations) [1hour]

9 5 2 Calculating the PFHD and PFDavg

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 51

VAD VAG VAH VAV

H1

Rp frac14(NPT frac14)

H2

E

LF

F

H4

H3

B

VAxS VAxF

L2G

G

Technical data

9 6 Dimensions

Type

Connec-tion Dimensions

WeightRpNPT DN

L L2 E F G H1 H2 H3 H4 Bmm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch kg lbs

VAx 115 12 15 75 29 ndash ndash 75 29 15 06 ndash ndash 143 56 82 32 161 63 117 46 97 38 18 40VAH 115 12 15 75 29 ndash ndash 75 29 15 06 ndash ndash 143 56 100 39 161 63 135 53 97 38 2 44VAx 120 34 20 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 82 33 161 63 117 46 97 38 19 42VAH 120 34 20 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 100 39 161 63 135 53 97 38 21 46VAx 125 1 25 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 82 33 161 63 117 46 97 38 19 42VAH 125 1 25 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 100 39 161 63 135 53 97 38 21 46VAx 240 112 40 128 50 200 79 85 33 29 11 66 26 170 67 112 44 191 75 162 64 125 49 44 97VAH 240 112 40 128 50 200 79 85 33 29 11 66 26 170 67 132 52 191 75 182 72 125 49 47 104VAx 350 2 50 155 61 230 91 85 33 36 14 74 29 180 70 135 53 201 79 196 77 160 63 61 134VAH 350 2 50 155 61 230 91 85 33 36 14 74 29 180 70 156 61 201 79 217 85 160 63 64 141

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 52

10 Converting unitssee wwwadlatusorg

11 Maintenance cyclesAt least once per annum at least twice per annum for biologi-cally produced methaneIf the flow rate drops clean the strainer

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 53

12 Glossary12 1 Diagnostic coverage DCMeasure of the effectiveness of diagnostics which may be determined as the ratio between the failure rate of detected dangerous failures and the failure rate of total dangerous failuresNOTE Diagnostic coverage can exist for the whole or parts of a safety-related system For example diagnostic cover-age could exist for sensors andor logic system andor final elements Unit see EN ISO 13849-12008

12 2 Mode of operationHigh demand mode or continuous modeOperating mode where the frequency of demands for opera-tion made on a safety-related system is greater than one per year or greater than twice the proof-test frequencysee EN 61508-42008

12 3 CategoryClassification of the safety-related parts of a control system in respect of their resistance to faults and their subsequent behaviour in the fault condition and which is achieved by the structural arrangement of the parts fault detection andor by their reliability see EN ISO 13849-12008

12 4 Common cause failure CCFFailures of different items resulting from a single event where these failures are not consequences of each othersee EN ISO 13849-12008

12 5 Fraction of undetected common cause failures β Fraction of undetected failures of redundant components due to a single event whereby these failures are not based on mutual causesNOTE β is expressed as a fraction in the equations and as a percentage elsewheresee EN 61508-62010

12 6 B10d valueMean number of cycles until 10 of the components fail dan-gerouslysee EN ISO 13849-12008

12 7 T10d valueMean time until 10 of the components fail dangerouslysee EN ISO 13849-12008

12 8 Hardware fault tolerance HFTA hardware fault tolerance of N means that N + 1 is the mini-mum number of faults that could cause a loss of the safety functionsee IEC 61508-22010

12 9 Mean dangerous failure rate λD Mean rate of dangerous failures during operation time (T10d) Unit 1hsee EN ISO 13849-12008

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 54

12 10 Safe failure fraction SFFFraction of safe failures related to all failures which are as-sumed to appearsee EN 13611A22011

12 11 Probability of dangerous failure PFHD Value describing the likelihood of dangerous failure per hour of a component for high demand mode or continuous mode Unit 1hsee EN 13611A22011

12 12 Mean time to dangerous failure MTTFd Expectation of the mean time to dangerous failuresee EN ISO 13849-12008

12 13 Demand rate nop Mean number of annual operationssee EN ISO 13849-12008

12 14 Average probability of dangerous failure on demand PFDavg (LDM = 1 ndash 10 switching cyclesyear)Average probability of a dangerous failure of the safety function on demand (LDM = low demand mode)see EN 61508-6

Glossary

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415

Finally we are offering you the opportunity to assess this ldquoTechnical Information (TI)rdquo and to give us your opinion so that we can improve our documents further and suit them to your needs

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Remarks

(Adobe Reader 7 or higher required) wwwadobecom

Elster GmbH Postfach 2809 middot 49018 Osnabruumlck Strotheweg 1 middot 49504 Lotte (Buumlren) GermanyT +49 541 1214-0 F +49 541 1214-370 infokromschroedercomwwwkromschroedercom

The current addresses of our international agents are available on the Internetwwwkromschroederdeindexphpid=718ampL=1

We reserve the right to make technical modifications in the interests of progressCopyright copy 2015 Elster GmbH All rights reserved

Contact

Feedback

0325

0530

  • Pressure regulators with solenoid valve VAD VAG VAV VAH
  • Flow rate regulator VRH
  • Pressure regulators with double solenoid valve VCD VCG VCV VCH
  • Contents
  • 1 Application
    • 11 Examples of application
      • 111 Constant pressure control
      • 112 Constant pressure control with two gas solenoid valves
      • 113 Constant pressure control with max pressure switch
      • 114 Constant pressure control with non-controlled pilot gas outlet
      • 115 Modulating control
      • 116 Modulating control with two gas solenoid valves
      • 117 Modulating control with two gas solenoid valves and inlet pressure switch
      • 118 HighLow control
      • 119 Zero pressure control
      • 1110 Staged flow rate control
      • 1111 Continuous or staged flow rate control
      • 1112 Modulating control with variable airgas ratio control with gas solenoid valve
      • 1113 Modulating control in residential heat generation
          • 2 Certification
          • 3 Function
            • 31 VAD VAG VAH VRH VAV
              • 311 Pressure regulator for gas VAD
              • 312 Airgas ratio control VAG
              • 313 Flow rate regulators VAH VRH
              • 314 Variable airgas ratio control VAV
              • 315 Pressure regulator with gas solenoid valve VAxS position indicator with visual indicator
                • 32 Animation
                • 33 Connection diagram
                  • 331 VAx with M20 cable gland
                  • 332 VAx with plug
                  • 333 VAS with VADVAGVAHVAV with M20 cable gland
                  • 334 VAS with VADVAGVAHVAV with plug
                      • 4 Replacement possibilities for MODULINE pressure regulators with gas solenoid valve
                        • 41 GVS GVI GVIB GVR and GVRH are to be replaced by VAD VAG VAG+VAS VAH and VAV
                          • 5 Flow rate
                            • 51 Selection example for VAD
                              • 511 Calculate VAD
                                • 52 Selection example for VAG VAH VRH VAV
                                  • 521 CalculateVAG VxHVAV
                                    • 53 Selection example for zero governor VAGN
                                      • 531 Calculate VAGN
                                          • 6 Selection
                                            • 61 Selection table for pressure regulator with solenoid valve VAD
                                            • 62 Type code for VAD
                                            • 63 Selection table for airgas ratio control with solenoid valve VAG flow rate regulators VAH VRH
                                            • 64 Type code for VAG VAH VRH
                                            • 65 Selection table for variable airgas ratio control with solenoid valve VAV
                                            • 66 Type code for VAV
                                            • 67 Accessories
                                              • 7 Project planning information
                                                • 71 Installation
                                                  • 711 Installation position
                                                    • 72 Setting the low-fire rate on VAG VAH VRH VAV
                                                    • 73 Setting the high-fire rate on VAV
                                                      • 731 Calculation
                                                          • 8 Accessories
                                                            • 81 Gas pressure switch DGVC for VAx VRH
                                                            • 82 Gas pressure switch DGVCT for VAxT VRHT
                                                            • 83 Bypass valvepilot gas valve VAS 1
                                                              • 831 VAS 1 attached to VADVAGVAHVAV 1
                                                              • 832 VAS 1 attached to VADVAGVAHVAV 2 VADVAGVAHVAV 3
                                                              • 833 Flow rate
                                                                • 84 Bypass valvepilot gas valve VBY 8 for VADVAGVAHVAV 1
                                                                  • 841 Scope of delivery VBY 8I as bypass valve
                                                                  • 842 Scope of delivery VBY 8R as pilot gas valve
                                                                  • 843 Selection
                                                                  • 844 Type code
                                                                  • 845 Flow rate
                                                                  • 846 Technical data
                                                                    • 85 Tightness control TC 116V
                                                                    • 86 Pressure test points
                                                                    • 87 Cable gland set
                                                                    • 88 Seal set VA 1thinspndashthinsp3
                                                                    • 89 Differential pressure orifice
                                                                    • 810 Retaining frame
                                                                    • 811 Attachment block
                                                                    • 812 Gas control line
                                                                    • 813 Measuring orifice VMO
                                                                    • 814 Filter module VMF
                                                                    • 815 Fine-adjusting valve VMV
                                                                      • 9 Technical data
                                                                        • 91 VAD
                                                                        • 92 VAG
                                                                        • 93 VAH VRH
                                                                        • 94 VAV
                                                                        • 95 Safety-specific characteristic values for VAx 1thinspndashthinsp3
                                                                          • 951 Determining the PFHD value the λD value and the MTTFd value
                                                                          • 952 Calculating the PFHD and PFDavg
                                                                            • 96 Dimensions
                                                                              • 10 Converting units
                                                                              • 11 Maintenance cycles
                                                                              • 12 Glossary
                                                                                • 121 Diagnostic coverage DC
                                                                                • 122 Mode of operation
                                                                                • 123 Category
                                                                                • 124 Common cause failure CCF
                                                                                • 125 Fraction of undetected common cause failures β
                                                                                • 126 B10d value
                                                                                • 127 T10d value
                                                                                • 128 Hardware fault tolerance HFT
                                                                                • 129 Mean dangerous failure rate λD
                                                                                • 1210 Safe failure fraction SFF
                                                                                • 1211 Probability of dangerous failure PFHD
                                                                                • 1212 Mean time to dangerous failure MTTFd
                                                                                • 1213 Demand rate nop
                                                                                • 1214 Average probability of dangerous failure on demand PFDavg
                                                                                  • Feedback
                                                                                  • Contact
                                                                                      1. naechste_Seite 24
                                                                                      2. naechste Seite 18
                                                                                      3. naechste Seite 6
                                                                                      4. naechste Seite 16
                                                                                      5. naechste Seite 14
                                                                                      6. naechste Seite 25
                                                                                      7. naechste_Seite 11
                                                                                      8. naechste_Seite 17
                                                                                      9. fbArbeitspunkt_Min Ja
                                                                                      10. fbArbeitspunkt Ja
                                                                                      11. ftProgramm Standard-Programm
                                                                                      12. fz_kv
                                                                                      13. fz_pe 80
                                                                                      14. fz_pG 60
                                                                                      15. fzDelta_p_Soll 20
                                                                                      16. ftEinheit_Druck mbar
                                                                                      17. fatTyp [115]
                                                                                      18. fbArbeitspunkt_Min_2 Ja
                                                                                      19. fbArbeitspunkt_2 Ja
                                                                                      20. ftRegler_Typ VAG
                                                                                      21. ftProgramm_2 Standard-Programm
                                                                                      22. fz_kv_2
                                                                                      23. fatMedium [08]
                                                                                      24. fzDichte 08
                                                                                      25. ftEinheit_Dichte kgm3
                                                                                      26. fzV_Norm 30
                                                                                      27. ftEinheit_Volstrom m3h
                                                                                      28. fz_pe_2 80
                                                                                      29. fz_pG_2 60
                                                                                      30. fzDelta_p_Soll_2 20
                                                                                      31. ftEinheit_Druck2 [mbar]
                                                                                      32. ftEinheit_Geschw [ms]
                                                                                      33. fatTyp_2 [10954451150103322]
                                                                                      34. fbArbeitspunkt_Min_3 Ja
                                                                                      35. fbArbeitspunkt_3 Ja
                                                                                      36. ftProgramm_3 Standard-Programm
                                                                                      37. fz_kv_3
                                                                                      38. fz_pe_3 20
                                                                                      39. fz_pG_3 0
                                                                                      40. fzDelta_p_Soll_3 20
                                                                                      41. fatTyp_3 [123]
                                                                                      42. fatSchaltleistung [6363683]
                                                                                      43. fz_nop_Stunde 1
                                                                                      44. fz_nop_Jahr 8760
                                                                                      45. fzZyklus 3600
                                                                                      46. fzB10d 6363683
                                                                                      47. fzT10d 10
                                                                                      48. fzPFHd_1V 15714170551864384e-8
                                                                                      49. fzPFDavg_1V
                                                                                      50. ftGeeignet_1V PL d SIL 2
                                                                                      51. fzPFHd_2V 33505832253532625e-10
                                                                                      52. fzPFDavg_2V
                                                                                      53. ftGeeignet_2V PL e SIL 3
                                                                                      54. ftUebersicht Off
                                                                                      55. ftVerstaendlichkeit Off
                                                                                      56. ftFehlende_Info
                                                                                      57. ftUmfang Off
                                                                                      58. ftVerwendung_1 Off
                                                                                      59. ftVerwendung_2 Off
                                                                                      60. ftVerwendung_3 Off
                                                                                      61. ftVerwendung_4 Off
                                                                                      62. ftNavigation Off
                                                                                      63. ftTaetigkeitsbereich Off
                                                                                      64. ftBemerkung
                                                                                      65. Michael Rehkamp Elster Kromschroumlder>btnSenden
Page 40: VAD, VAG, VAV, VAH, VRH, VCD, VCG, VCV, VCH · PDF fileVAD, VAG, VAH, VAV, VRH, VCD, VCG, VCV, VCH · Edition 04.15 6 VAD VAD VAS 1 .1 Examples of application 1 .1 .1 Constant pressure

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 40

Accessories

8 4 Bypass valvepilot gas valve VBY 8 for VADVAGVAHVAV 1

B

C

AVBY 8

VAx 1

55

(217)40(157)

70 (276)

80(315)

Rp frac14(pilot gas valve)

For mounting on VAD VAG VAH VAV 1 and double solenoid valve VCD VCG VCH VCV 1

8 4 1 Scope of delivery VBY 8I as bypass valveA 1 times bypass valve VBY 8IB 2 times retaining screws with 4 times O-rings both retaining screws

have a bypass orificeC 1 times grease for o-rings

8 4 2 Scope of delivery VBY 8R as pilot gas valveA 1 times pilot gas valve VBY 8RB 2 times retaining screws with 5 x O-rings one retaining screw

has a bypass orifice (2 x O-rings) the other does not (3 x O-rings)

C 1 times grease for O-rings

8 4 3 SelectionType I R W Q K 6L -R -L E B D 05

VBY 8

Order exampleVBY 8RW6L-LED

8 4 4 Type codeCode DescriptionVBY Gas solenoid valve8 Nominal sizeIR

For internal gas pick-up as bypass valveFor external gas pick-up as pilot gas valve

KQW

Mains voltage 24 V DC Mains voltage 120 V AC 5060 HzMains voltage 230 V AC 5060 Hz

6L Electrical connection via plug and socket with LED-R-L

Attachment side of main valve right-hand sideAttachment side of main valve left-hand side

EB

Attached to the VAxEnclosed (separate packing unit)

05D

Nozzle diameter = 05 mm (002)Flow adjustment

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 41

2

01

02

03

05

081

3

456

810

20

30

405060

80100

∆p [m

bar]

1

3

201 02 03 05 1 2 3001 003 4

Qn [m3h]

02 03 05 1 2

01 02 05

002 006

002

002 006 1

0010006 005 01

001

0003

0006 2 3

VBY 8DVBY 805

∆p [i

nch

WC]

1

2

3

456

810

20

30

40

040506

08

1

Qn [SCFH]10 40 60 1005 2081 2 30402

01

02

03

004005006

008

Adjusting range

8 4 5 Flow rateVBY 8 D

+

-

The flow rate can be set by turning the flow rate restrictor (4 mm016 Allen screw) frac14 of a turn Flow rate 10 to 100

VBY 8 05The flow is routed through a 05 mm (002) nozzle and thus has a fixed characteristic flow rate curve Adjustment is not possible

8 4 6 Technical dataInlet pressure pu max 500 mbar (7 psig)Ambient temperature 0 to +60degC (32 to 140degF) no condensation permittedStorage temperature 0 to +40degC (32 to 104degF) no condensation permittedPower consumption 24 V = 8 W 120 V = 8 W 230 V = 95 WEnclosure IP 54

Accessories gt Bypass valvepilot gas valve VBY 8 for VADVAGVAHVAV 1

= natural gas (ρ = 080 kgm3) = propane (ρ = 201 kgm3) = air (ρ = 129 kgm3)

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 42

TC 116VB C

56(22)

49(193)

27(106)

A

A

VCx 1 VCx 2VCx 3

8 5 Tightness control TC 116Vfor VAx 1 ndash 3An adapter plate is required to attach the tightness control to the right- or left-hand side of the pressure regulator with gas solenoid valveScope of delivery A 1 times adapter plate B 2 times O-rings C 2 times retaining screwsFor attachment to left-hand side Order No 74922391 right-hand side Order No 74921995

8 6 Pressure test pointsTest points to check the inlet pressure pu and outlet pressure pdScope of delivery 1 x pressure test points with 1 x profiled sealing rings Order No 74923390

8 7 Cable gland setWhen wiring a double solenoid valve with pressure regula-tor VCx the connection boxes are to be connected using a cable gland setThe cable gland set can only be used if the connection boxes are at the same height and on the same side and if both valves are equipped either with or without a proof of closure switchVA 1 Order No 74921985 VA 2 Order No 74921986 VA 3 Order No 74921987

Accessories

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 43

A B

D

C

Accessories

8 9 Differential pressure orifice

Size PipeDN

Differential pressure orifi cewith outlet dia

1 15 17 mm 0671 20 25 mm 0981 25 30 mm 1182 40 46 mm 1813 50 58 mm 228

If pressure regulator VADVAGVAV 1 is retrofitted upstream of gas solenoid valve VAS 1 a DN 25 differential pressure orifice with outlet opening d = 30 mm (118) must be inserted at the outlet of the pressure regulatorIn the case of pressure regulator VAx 115 or VAx 120 the DN 25 differential pressure orifice must be ordered separately and retrofitted Order No 74922240

8 8 Seal set VA 1 ndash 3VA 1 Order No 74921988 VA 2 Order No 74921989 VA 3 Order No 74921990Scope of deliveryA 1 times double block seal B 2 times O-rings (flange) C 2 times O-rings (pressure switch) for pressure test pointscrew plug D 2 times sealing rings (flat sealing) and 2 times profiled sealing rings

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 44

BA

C

pd-

8 11 Attachment blockFor locked installation of pressure gauge and other acces-soriesScope of delivery A 1 times attachment block B 2 times self-tapping screws for installation C 2 times O-rings

Accessories

8 10 Retaining frameIn the event that a pressure regulator VAx is installed at a later point upstream of a gas solenoid valve VAS a measur-ing orifice VMO or a fine-adjusting valve VMV the retaining frame must be fitted at the inlet of the second device in order to fasten the differential pressure orifice at the regulator outlet Order the retaining frame separatelyRetaining frame for Size 1 Order No 74923029 Size 2 Order No 74923030 Size 3 Order No 74923031

8 12 Gas control lineFine-adjusting valve VMV can be installed on the flow rate regulator VAH for fine adjustment of the gas flow rateThe gas control line for gas outlet pressure pd- is available with 2 18 compression fittingsSize 1 Order No 74924458 Size 2 Order No 74924459

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 45

8 13 Measuring orifice VMOThe measuring orifice VMO is designed to reduce the gas and air flow rates and is installed downstream of the valVario control The measuring orifice is available with Rp internal thread (NPT internal thread) or flange to ISO 7005See wwwdocuthekcom Elster Kromschroumlder Krom-schroumlder LBE Products 03 Valves and butterfly valves valVario accessories Type of document Technical Informa-tion VMO

Accessories

8 14 Filter module VMFUsing the filter module VMF the gas flow upstream of the gas solenoid valve VAS and the airgas ratio control is cleaned The filter module is available with Rp internal thread (NPT internal thread) or flange to ISO 7005 and can also be supplied with fitted pressure switch as an optionSee wwwdocuthekcom Elster Kromschroumlder Krom-schroumlder LBE Products 03 Valves and butterfly valves valVario accessories Type of document Technical Informa-tion VMF

8 15 Fine-adjusting valve VMVThe flow rate is set using the fine-adjusting valve VMV The fine-adjusting valve is available with Rp internal thread (NPT internal thread) or flange to ISO 7005See wwwdocuthekcom Elster Kromschroumlder Krom-schroumlder LBE Products 03 Valves and butterfly valves valVario accessories Type of document Technical Infor-mation VMV

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 46

9 Technical dataGas types natural gas LPG (gaseous) biologically produced methane (max 01 -by-vol H2S) or clean air other gases on request The gas must be clean and dry in all temperature conditions and must not contain condensateCE and FM approved UL listed max inlet pressure pu 10 ndash 500 mbar (4 ndash 200 WC) FM approved (230 V AC 120 V AC 24 V DC) non opera-tional pressure 700 mbar (10 psig)ANSICSA approved (230 V AC 120 V AC 24 V DC) up to 350 mbar (5 psig)Opening time of the solenoid valve quick opening le 05 s Closing time quick closing lt 1 sMedium and ambient temperatures -20 to +60degC (-4 to +140degF) no condensation permittedStorage temperature -20 to +40degC (-4 to +104degF)Enclosure IP 65Valve housing aluminium valve seal NBRConnection flanges with internal thread Rp to ISO 7-1 NPT to ANSIASMESafety valve Class A to EN 161 Factory Mutual Research Class 7400 Process Control Valves (230 V AC 120 V AC 24 V DC) ANSI Z2121 and CSA 65 ANSI Z2118 and CSA 63Control class A to EN 88-1Control range up to 101

Mains voltage 230 V AC +10-15 5060 Hz 200 V AC +10-15 5060 Hz 120 V AC +10-15 5060 Hz 100 V AC +10-15 5060 Hz 24 V DC plusmn20Duty cycle 100Power factor of the solenoid coil cos φ = 09Power consumption

Type Voltage Power

VAx 1

24 V DC 25 W ndash100 V AC 25 W (26 VA)120 V AC 25 W (26 VA)200 V AC 25 W (26 VA)230 V AC 25 W (26 VA)

VAx 2 VAx 3

24 V DC 36 W ndash100 V AC 36 W (40 VA)120 V AC 40 W (44 VA)200 V AC 40 W (44 VA)230 V AC 40 W (44 VA)

VBY24 V DC 8 W ndash

120 V AC 8 W ndash230 V AC 95 W ndash

Cable gland M20 times 15Electrical connection cable with max 25 mm2 (AWG 12) or plug with socket to EN 175301-803

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 47

Position indicator contact rating

Type Voltage Min current(resistive load)

Max current(resistive load)

VAxS VCxS 12 ndash 250 V AC 5060 Hz 100 mA 3 AVAxG VCxG 12 ndash 30 V DC 2 mA 01 A

Position indicator switching frequency max 5 times per minute

Switching current [A]

Switching cyclescos φ = 1 cos φ = 06

01 500000 50000005 300000 250000

1 200000 1000003 100000 ndash

Limited to max 200000 cycles for heating systems

9 1 VADOutlet pressure pd VAD-25 25 ndash 25 mbar (1 ndash 10 WC) VAD-50 20 ndash 50 mbar (8 ndash 20 WC) VAD-100 35 ndash 100 mbar (14 ndash 40 WC)Combustion chamber control pressure psc (connection psa)

-20 to +20 mbar (-78 to +78 WC)

VAD

pu

pd

(psa)

9 2 VAGOutlet pressure pd 05 ndash 100 mbar (02 ndash 40 WC)Air control pressure psa 05 ndash 100 mbar (02 ndash 40 WC)

Adjusting range at low fire plusmn5 mbar (plusmn2 WC)Transmission ratio of gas to air 11The inlet pressure must always be higher than the air control pressure psa + pressure loss ∆p + 5 mbar (2 WC)

VAGpd

pu

psa

psa

VAGK 1 x 18 coupling for plastic hose (internal dia 39 mm (015) external dia 61 mm (024)) or VAGE 1 x 18 compression fitting for 6 times 1 tube or VAGA 1 x NPT 18 adapter or VAGN zero governor with breathing orifice

9 3 VAH VRHAir control pressure psa 06 ndash 100 mbar (024 ndash 40 WC) Differential air pressure ∆psa (psa - psa-) 06 ndash 50 mbar (024 ndash 197 WC) Differential gas pressure ∆pd (pd - pd-) 06 ndash 50 mbar (024 ndash 197 WC)Transmission ratio of gas to air 11The inlet pressure must always be higher than the differen-tial air pressure ∆psa + pressure loss ∆p + max gas pres-sure on burner + 5 mbar (2 WC)Adjusting range at low fire plusmn5 mbar (plusmn2 WC)

Technical data

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 48

VAHVRH

pd-

pu

psa-

psa

Connection of the air control pressure psaVAHE VRHE 3 x 18 compression fitting for 6 times 1 tube or VAHA VRHA 3 x NPT 18 adapter

9 4 VAVOutlet pressure pd 05 ndash 30 mbar (02 ndash 117 WC)Air control pressure psa 04 ndash 30 mbar (015 ndash 117 WC)Combustion chamber control pressure psc

-20 to +20 mbar (-78 to +78 WC)Min control pressure differential psa - psc 04 mbar (015 WC)Min pressure differential pd - psc 05 mbar (02 WC)Adjusting range at low fire plusmn15 mbar (plusmn06 WC)Transmission ratio of gas to air 061 to 31The inlet pressure pu must always be higher than the air control pressure psa times transmission ratio V + pressure loss ∆p + 15 mbar (06 WC)

pu

pd psapsc

VAV

VAVK 2 x plastic hose couplings (internal dia 39 mm (015) external dia 61 mm (024)) or VAVE 2 x 18 compression fitting for 6 times 1 tube or VAVA 2 x NPT 18 adapter

Technical data

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 49

9 5 Safety-specific characteristic values for VAx 1 ndash 3For SILSuitable for Safety Integrity Level SIL 1 2 3

Diagnostic coverage DC 0

Type of subsystem Type A to EN 61508-2 74312

Operating mode High demand mode pursu-ant to EN 61508-4 3512

For PLSuitable for Performance Level PL a b c d e

Category B 1 2 3 4Common cause failure CCF gt 65Application of essential safety requirements Satisfied

Application of tried-and-tested safety requirements Satisfied

For SIL and PL

B10d value

Operating cyclesVAD VAG VAV VAH 1 10094360VAD VAG VAV VAH 2 8229021VAD VAG VAV VAH 3 6363683

Hardware fault tolerance (1 valve) HFT 0

Hardware fault tolerance (2 valves) HFT 1

Safe failure fraction SFF gt 90Fraction of undetected com-mon cause failures β ge 2

Max service life under operating conditions10 years after date of production plus max 12 year in stor-age prior to first use or once the given number of operating cycles has been reached depending on which is achieved firstThe devices are suitable for single-channel systems (HFT = 0) up to SIL 2PL d and up to SIL 3PL e when two re-dundant valves are installed in a double-channel architecture (HFT = 1) provided that the complete system complies with the requirements of EN 61508ISO 13849

For a glossary of terms see page 53 (Glossary)

Technical data

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 50

nop 1hnop 1a

sB10d

T10d aPFHD (1 VAx) 1h

PFHD (2 VAx) 1h

PFDavg (1 VAx)

PFDavg (2 VAx)

Technical data gt Safety-specific characteristic values for VAx 1 ndash 3

9 5 1 Determining the PFHD value the λD value and the MTTFd value

PFHD = λD = x nop= 1MTTFd

01B10d

PFDavg = x λD x 24 x 365 x T10d 12

Type

Cycle time

suitable for

suitable for

PFHD = Probability of dangerous failure (HDM = high de-mand mode) [1hour]PFDavg = Average probability of dangerous failure on de-mand (LDM = low demand mode)λD = Mean dangerous failure rate [1hour]MTTFd = Mean time to dangerous failure [hours]nop = Demand rate (mean number of annual operations) [1hour]

9 5 2 Calculating the PFHD and PFDavg

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 51

VAD VAG VAH VAV

H1

Rp frac14(NPT frac14)

H2

E

LF

F

H4

H3

B

VAxS VAxF

L2G

G

Technical data

9 6 Dimensions

Type

Connec-tion Dimensions

WeightRpNPT DN

L L2 E F G H1 H2 H3 H4 Bmm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch kg lbs

VAx 115 12 15 75 29 ndash ndash 75 29 15 06 ndash ndash 143 56 82 32 161 63 117 46 97 38 18 40VAH 115 12 15 75 29 ndash ndash 75 29 15 06 ndash ndash 143 56 100 39 161 63 135 53 97 38 2 44VAx 120 34 20 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 82 33 161 63 117 46 97 38 19 42VAH 120 34 20 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 100 39 161 63 135 53 97 38 21 46VAx 125 1 25 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 82 33 161 63 117 46 97 38 19 42VAH 125 1 25 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 100 39 161 63 135 53 97 38 21 46VAx 240 112 40 128 50 200 79 85 33 29 11 66 26 170 67 112 44 191 75 162 64 125 49 44 97VAH 240 112 40 128 50 200 79 85 33 29 11 66 26 170 67 132 52 191 75 182 72 125 49 47 104VAx 350 2 50 155 61 230 91 85 33 36 14 74 29 180 70 135 53 201 79 196 77 160 63 61 134VAH 350 2 50 155 61 230 91 85 33 36 14 74 29 180 70 156 61 201 79 217 85 160 63 64 141

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 52

10 Converting unitssee wwwadlatusorg

11 Maintenance cyclesAt least once per annum at least twice per annum for biologi-cally produced methaneIf the flow rate drops clean the strainer

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 53

12 Glossary12 1 Diagnostic coverage DCMeasure of the effectiveness of diagnostics which may be determined as the ratio between the failure rate of detected dangerous failures and the failure rate of total dangerous failuresNOTE Diagnostic coverage can exist for the whole or parts of a safety-related system For example diagnostic cover-age could exist for sensors andor logic system andor final elements Unit see EN ISO 13849-12008

12 2 Mode of operationHigh demand mode or continuous modeOperating mode where the frequency of demands for opera-tion made on a safety-related system is greater than one per year or greater than twice the proof-test frequencysee EN 61508-42008

12 3 CategoryClassification of the safety-related parts of a control system in respect of their resistance to faults and their subsequent behaviour in the fault condition and which is achieved by the structural arrangement of the parts fault detection andor by their reliability see EN ISO 13849-12008

12 4 Common cause failure CCFFailures of different items resulting from a single event where these failures are not consequences of each othersee EN ISO 13849-12008

12 5 Fraction of undetected common cause failures β Fraction of undetected failures of redundant components due to a single event whereby these failures are not based on mutual causesNOTE β is expressed as a fraction in the equations and as a percentage elsewheresee EN 61508-62010

12 6 B10d valueMean number of cycles until 10 of the components fail dan-gerouslysee EN ISO 13849-12008

12 7 T10d valueMean time until 10 of the components fail dangerouslysee EN ISO 13849-12008

12 8 Hardware fault tolerance HFTA hardware fault tolerance of N means that N + 1 is the mini-mum number of faults that could cause a loss of the safety functionsee IEC 61508-22010

12 9 Mean dangerous failure rate λD Mean rate of dangerous failures during operation time (T10d) Unit 1hsee EN ISO 13849-12008

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 54

12 10 Safe failure fraction SFFFraction of safe failures related to all failures which are as-sumed to appearsee EN 13611A22011

12 11 Probability of dangerous failure PFHD Value describing the likelihood of dangerous failure per hour of a component for high demand mode or continuous mode Unit 1hsee EN 13611A22011

12 12 Mean time to dangerous failure MTTFd Expectation of the mean time to dangerous failuresee EN ISO 13849-12008

12 13 Demand rate nop Mean number of annual operationssee EN ISO 13849-12008

12 14 Average probability of dangerous failure on demand PFDavg (LDM = 1 ndash 10 switching cyclesyear)Average probability of a dangerous failure of the safety function on demand (LDM = low demand mode)see EN 61508-6

Glossary

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415

Finally we are offering you the opportunity to assess this ldquoTechnical Information (TI)rdquo and to give us your opinion so that we can improve our documents further and suit them to your needs

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Remarks

(Adobe Reader 7 or higher required) wwwadobecom

Elster GmbH Postfach 2809 middot 49018 Osnabruumlck Strotheweg 1 middot 49504 Lotte (Buumlren) GermanyT +49 541 1214-0 F +49 541 1214-370 infokromschroedercomwwwkromschroedercom

The current addresses of our international agents are available on the Internetwwwkromschroederdeindexphpid=718ampL=1

We reserve the right to make technical modifications in the interests of progressCopyright copy 2015 Elster GmbH All rights reserved

Contact

Feedback

0325

0530

  • Pressure regulators with solenoid valve VAD VAG VAV VAH
  • Flow rate regulator VRH
  • Pressure regulators with double solenoid valve VCD VCG VCV VCH
  • Contents
  • 1 Application
    • 11 Examples of application
      • 111 Constant pressure control
      • 112 Constant pressure control with two gas solenoid valves
      • 113 Constant pressure control with max pressure switch
      • 114 Constant pressure control with non-controlled pilot gas outlet
      • 115 Modulating control
      • 116 Modulating control with two gas solenoid valves
      • 117 Modulating control with two gas solenoid valves and inlet pressure switch
      • 118 HighLow control
      • 119 Zero pressure control
      • 1110 Staged flow rate control
      • 1111 Continuous or staged flow rate control
      • 1112 Modulating control with variable airgas ratio control with gas solenoid valve
      • 1113 Modulating control in residential heat generation
          • 2 Certification
          • 3 Function
            • 31 VAD VAG VAH VRH VAV
              • 311 Pressure regulator for gas VAD
              • 312 Airgas ratio control VAG
              • 313 Flow rate regulators VAH VRH
              • 314 Variable airgas ratio control VAV
              • 315 Pressure regulator with gas solenoid valve VAxS position indicator with visual indicator
                • 32 Animation
                • 33 Connection diagram
                  • 331 VAx with M20 cable gland
                  • 332 VAx with plug
                  • 333 VAS with VADVAGVAHVAV with M20 cable gland
                  • 334 VAS with VADVAGVAHVAV with plug
                      • 4 Replacement possibilities for MODULINE pressure regulators with gas solenoid valve
                        • 41 GVS GVI GVIB GVR and GVRH are to be replaced by VAD VAG VAG+VAS VAH and VAV
                          • 5 Flow rate
                            • 51 Selection example for VAD
                              • 511 Calculate VAD
                                • 52 Selection example for VAG VAH VRH VAV
                                  • 521 CalculateVAG VxHVAV
                                    • 53 Selection example for zero governor VAGN
                                      • 531 Calculate VAGN
                                          • 6 Selection
                                            • 61 Selection table for pressure regulator with solenoid valve VAD
                                            • 62 Type code for VAD
                                            • 63 Selection table for airgas ratio control with solenoid valve VAG flow rate regulators VAH VRH
                                            • 64 Type code for VAG VAH VRH
                                            • 65 Selection table for variable airgas ratio control with solenoid valve VAV
                                            • 66 Type code for VAV
                                            • 67 Accessories
                                              • 7 Project planning information
                                                • 71 Installation
                                                  • 711 Installation position
                                                    • 72 Setting the low-fire rate on VAG VAH VRH VAV
                                                    • 73 Setting the high-fire rate on VAV
                                                      • 731 Calculation
                                                          • 8 Accessories
                                                            • 81 Gas pressure switch DGVC for VAx VRH
                                                            • 82 Gas pressure switch DGVCT for VAxT VRHT
                                                            • 83 Bypass valvepilot gas valve VAS 1
                                                              • 831 VAS 1 attached to VADVAGVAHVAV 1
                                                              • 832 VAS 1 attached to VADVAGVAHVAV 2 VADVAGVAHVAV 3
                                                              • 833 Flow rate
                                                                • 84 Bypass valvepilot gas valve VBY 8 for VADVAGVAHVAV 1
                                                                  • 841 Scope of delivery VBY 8I as bypass valve
                                                                  • 842 Scope of delivery VBY 8R as pilot gas valve
                                                                  • 843 Selection
                                                                  • 844 Type code
                                                                  • 845 Flow rate
                                                                  • 846 Technical data
                                                                    • 85 Tightness control TC 116V
                                                                    • 86 Pressure test points
                                                                    • 87 Cable gland set
                                                                    • 88 Seal set VA 1thinspndashthinsp3
                                                                    • 89 Differential pressure orifice
                                                                    • 810 Retaining frame
                                                                    • 811 Attachment block
                                                                    • 812 Gas control line
                                                                    • 813 Measuring orifice VMO
                                                                    • 814 Filter module VMF
                                                                    • 815 Fine-adjusting valve VMV
                                                                      • 9 Technical data
                                                                        • 91 VAD
                                                                        • 92 VAG
                                                                        • 93 VAH VRH
                                                                        • 94 VAV
                                                                        • 95 Safety-specific characteristic values for VAx 1thinspndashthinsp3
                                                                          • 951 Determining the PFHD value the λD value and the MTTFd value
                                                                          • 952 Calculating the PFHD and PFDavg
                                                                            • 96 Dimensions
                                                                              • 10 Converting units
                                                                              • 11 Maintenance cycles
                                                                              • 12 Glossary
                                                                                • 121 Diagnostic coverage DC
                                                                                • 122 Mode of operation
                                                                                • 123 Category
                                                                                • 124 Common cause failure CCF
                                                                                • 125 Fraction of undetected common cause failures β
                                                                                • 126 B10d value
                                                                                • 127 T10d value
                                                                                • 128 Hardware fault tolerance HFT
                                                                                • 129 Mean dangerous failure rate λD
                                                                                • 1210 Safe failure fraction SFF
                                                                                • 1211 Probability of dangerous failure PFHD
                                                                                • 1212 Mean time to dangerous failure MTTFd
                                                                                • 1213 Demand rate nop
                                                                                • 1214 Average probability of dangerous failure on demand PFDavg
                                                                                  • Feedback
                                                                                  • Contact
                                                                                      1. naechste_Seite 24
                                                                                      2. naechste Seite 18
                                                                                      3. naechste Seite 6
                                                                                      4. naechste Seite 16
                                                                                      5. naechste Seite 14
                                                                                      6. naechste Seite 25
                                                                                      7. naechste_Seite 11
                                                                                      8. naechste_Seite 17
                                                                                      9. fbArbeitspunkt_Min Ja
                                                                                      10. fbArbeitspunkt Ja
                                                                                      11. ftProgramm Standard-Programm
                                                                                      12. fz_kv
                                                                                      13. fz_pe 80
                                                                                      14. fz_pG 60
                                                                                      15. fzDelta_p_Soll 20
                                                                                      16. ftEinheit_Druck mbar
                                                                                      17. fatTyp [115]
                                                                                      18. fbArbeitspunkt_Min_2 Ja
                                                                                      19. fbArbeitspunkt_2 Ja
                                                                                      20. ftRegler_Typ VAG
                                                                                      21. ftProgramm_2 Standard-Programm
                                                                                      22. fz_kv_2
                                                                                      23. fatMedium [08]
                                                                                      24. fzDichte 08
                                                                                      25. ftEinheit_Dichte kgm3
                                                                                      26. fzV_Norm 30
                                                                                      27. ftEinheit_Volstrom m3h
                                                                                      28. fz_pe_2 80
                                                                                      29. fz_pG_2 60
                                                                                      30. fzDelta_p_Soll_2 20
                                                                                      31. ftEinheit_Druck2 [mbar]
                                                                                      32. ftEinheit_Geschw [ms]
                                                                                      33. fatTyp_2 [10954451150103322]
                                                                                      34. fbArbeitspunkt_Min_3 Ja
                                                                                      35. fbArbeitspunkt_3 Ja
                                                                                      36. ftProgramm_3 Standard-Programm
                                                                                      37. fz_kv_3
                                                                                      38. fz_pe_3 20
                                                                                      39. fz_pG_3 0
                                                                                      40. fzDelta_p_Soll_3 20
                                                                                      41. fatTyp_3 [123]
                                                                                      42. fatSchaltleistung [6363683]
                                                                                      43. fz_nop_Stunde 1
                                                                                      44. fz_nop_Jahr 8760
                                                                                      45. fzZyklus 3600
                                                                                      46. fzB10d 6363683
                                                                                      47. fzT10d 10
                                                                                      48. fzPFHd_1V 15714170551864384e-8
                                                                                      49. fzPFDavg_1V
                                                                                      50. ftGeeignet_1V PL d SIL 2
                                                                                      51. fzPFHd_2V 33505832253532625e-10
                                                                                      52. fzPFDavg_2V
                                                                                      53. ftGeeignet_2V PL e SIL 3
                                                                                      54. ftUebersicht Off
                                                                                      55. ftVerstaendlichkeit Off
                                                                                      56. ftFehlende_Info
                                                                                      57. ftUmfang Off
                                                                                      58. ftVerwendung_1 Off
                                                                                      59. ftVerwendung_2 Off
                                                                                      60. ftVerwendung_3 Off
                                                                                      61. ftVerwendung_4 Off
                                                                                      62. ftNavigation Off
                                                                                      63. ftTaetigkeitsbereich Off
                                                                                      64. ftBemerkung
                                                                                      65. Michael Rehkamp Elster Kromschroumlder>btnSenden
Page 41: VAD, VAG, VAV, VAH, VRH, VCD, VCG, VCV, VCH · PDF fileVAD, VAG, VAH, VAV, VRH, VCD, VCG, VCV, VCH · Edition 04.15 6 VAD VAD VAS 1 .1 Examples of application 1 .1 .1 Constant pressure

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 41

2

01

02

03

05

081

3

456

810

20

30

405060

80100

∆p [m

bar]

1

3

201 02 03 05 1 2 3001 003 4

Qn [m3h]

02 03 05 1 2

01 02 05

002 006

002

002 006 1

0010006 005 01

001

0003

0006 2 3

VBY 8DVBY 805

∆p [i

nch

WC]

1

2

3

456

810

20

30

40

040506

08

1

Qn [SCFH]10 40 60 1005 2081 2 30402

01

02

03

004005006

008

Adjusting range

8 4 5 Flow rateVBY 8 D

+

-

The flow rate can be set by turning the flow rate restrictor (4 mm016 Allen screw) frac14 of a turn Flow rate 10 to 100

VBY 8 05The flow is routed through a 05 mm (002) nozzle and thus has a fixed characteristic flow rate curve Adjustment is not possible

8 4 6 Technical dataInlet pressure pu max 500 mbar (7 psig)Ambient temperature 0 to +60degC (32 to 140degF) no condensation permittedStorage temperature 0 to +40degC (32 to 104degF) no condensation permittedPower consumption 24 V = 8 W 120 V = 8 W 230 V = 95 WEnclosure IP 54

Accessories gt Bypass valvepilot gas valve VBY 8 for VADVAGVAHVAV 1

= natural gas (ρ = 080 kgm3) = propane (ρ = 201 kgm3) = air (ρ = 129 kgm3)

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 42

TC 116VB C

56(22)

49(193)

27(106)

A

A

VCx 1 VCx 2VCx 3

8 5 Tightness control TC 116Vfor VAx 1 ndash 3An adapter plate is required to attach the tightness control to the right- or left-hand side of the pressure regulator with gas solenoid valveScope of delivery A 1 times adapter plate B 2 times O-rings C 2 times retaining screwsFor attachment to left-hand side Order No 74922391 right-hand side Order No 74921995

8 6 Pressure test pointsTest points to check the inlet pressure pu and outlet pressure pdScope of delivery 1 x pressure test points with 1 x profiled sealing rings Order No 74923390

8 7 Cable gland setWhen wiring a double solenoid valve with pressure regula-tor VCx the connection boxes are to be connected using a cable gland setThe cable gland set can only be used if the connection boxes are at the same height and on the same side and if both valves are equipped either with or without a proof of closure switchVA 1 Order No 74921985 VA 2 Order No 74921986 VA 3 Order No 74921987

Accessories

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 43

A B

D

C

Accessories

8 9 Differential pressure orifice

Size PipeDN

Differential pressure orifi cewith outlet dia

1 15 17 mm 0671 20 25 mm 0981 25 30 mm 1182 40 46 mm 1813 50 58 mm 228

If pressure regulator VADVAGVAV 1 is retrofitted upstream of gas solenoid valve VAS 1 a DN 25 differential pressure orifice with outlet opening d = 30 mm (118) must be inserted at the outlet of the pressure regulatorIn the case of pressure regulator VAx 115 or VAx 120 the DN 25 differential pressure orifice must be ordered separately and retrofitted Order No 74922240

8 8 Seal set VA 1 ndash 3VA 1 Order No 74921988 VA 2 Order No 74921989 VA 3 Order No 74921990Scope of deliveryA 1 times double block seal B 2 times O-rings (flange) C 2 times O-rings (pressure switch) for pressure test pointscrew plug D 2 times sealing rings (flat sealing) and 2 times profiled sealing rings

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 44

BA

C

pd-

8 11 Attachment blockFor locked installation of pressure gauge and other acces-soriesScope of delivery A 1 times attachment block B 2 times self-tapping screws for installation C 2 times O-rings

Accessories

8 10 Retaining frameIn the event that a pressure regulator VAx is installed at a later point upstream of a gas solenoid valve VAS a measur-ing orifice VMO or a fine-adjusting valve VMV the retaining frame must be fitted at the inlet of the second device in order to fasten the differential pressure orifice at the regulator outlet Order the retaining frame separatelyRetaining frame for Size 1 Order No 74923029 Size 2 Order No 74923030 Size 3 Order No 74923031

8 12 Gas control lineFine-adjusting valve VMV can be installed on the flow rate regulator VAH for fine adjustment of the gas flow rateThe gas control line for gas outlet pressure pd- is available with 2 18 compression fittingsSize 1 Order No 74924458 Size 2 Order No 74924459

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 45

8 13 Measuring orifice VMOThe measuring orifice VMO is designed to reduce the gas and air flow rates and is installed downstream of the valVario control The measuring orifice is available with Rp internal thread (NPT internal thread) or flange to ISO 7005See wwwdocuthekcom Elster Kromschroumlder Krom-schroumlder LBE Products 03 Valves and butterfly valves valVario accessories Type of document Technical Informa-tion VMO

Accessories

8 14 Filter module VMFUsing the filter module VMF the gas flow upstream of the gas solenoid valve VAS and the airgas ratio control is cleaned The filter module is available with Rp internal thread (NPT internal thread) or flange to ISO 7005 and can also be supplied with fitted pressure switch as an optionSee wwwdocuthekcom Elster Kromschroumlder Krom-schroumlder LBE Products 03 Valves and butterfly valves valVario accessories Type of document Technical Informa-tion VMF

8 15 Fine-adjusting valve VMVThe flow rate is set using the fine-adjusting valve VMV The fine-adjusting valve is available with Rp internal thread (NPT internal thread) or flange to ISO 7005See wwwdocuthekcom Elster Kromschroumlder Krom-schroumlder LBE Products 03 Valves and butterfly valves valVario accessories Type of document Technical Infor-mation VMV

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 46

9 Technical dataGas types natural gas LPG (gaseous) biologically produced methane (max 01 -by-vol H2S) or clean air other gases on request The gas must be clean and dry in all temperature conditions and must not contain condensateCE and FM approved UL listed max inlet pressure pu 10 ndash 500 mbar (4 ndash 200 WC) FM approved (230 V AC 120 V AC 24 V DC) non opera-tional pressure 700 mbar (10 psig)ANSICSA approved (230 V AC 120 V AC 24 V DC) up to 350 mbar (5 psig)Opening time of the solenoid valve quick opening le 05 s Closing time quick closing lt 1 sMedium and ambient temperatures -20 to +60degC (-4 to +140degF) no condensation permittedStorage temperature -20 to +40degC (-4 to +104degF)Enclosure IP 65Valve housing aluminium valve seal NBRConnection flanges with internal thread Rp to ISO 7-1 NPT to ANSIASMESafety valve Class A to EN 161 Factory Mutual Research Class 7400 Process Control Valves (230 V AC 120 V AC 24 V DC) ANSI Z2121 and CSA 65 ANSI Z2118 and CSA 63Control class A to EN 88-1Control range up to 101

Mains voltage 230 V AC +10-15 5060 Hz 200 V AC +10-15 5060 Hz 120 V AC +10-15 5060 Hz 100 V AC +10-15 5060 Hz 24 V DC plusmn20Duty cycle 100Power factor of the solenoid coil cos φ = 09Power consumption

Type Voltage Power

VAx 1

24 V DC 25 W ndash100 V AC 25 W (26 VA)120 V AC 25 W (26 VA)200 V AC 25 W (26 VA)230 V AC 25 W (26 VA)

VAx 2 VAx 3

24 V DC 36 W ndash100 V AC 36 W (40 VA)120 V AC 40 W (44 VA)200 V AC 40 W (44 VA)230 V AC 40 W (44 VA)

VBY24 V DC 8 W ndash

120 V AC 8 W ndash230 V AC 95 W ndash

Cable gland M20 times 15Electrical connection cable with max 25 mm2 (AWG 12) or plug with socket to EN 175301-803

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 47

Position indicator contact rating

Type Voltage Min current(resistive load)

Max current(resistive load)

VAxS VCxS 12 ndash 250 V AC 5060 Hz 100 mA 3 AVAxG VCxG 12 ndash 30 V DC 2 mA 01 A

Position indicator switching frequency max 5 times per minute

Switching current [A]

Switching cyclescos φ = 1 cos φ = 06

01 500000 50000005 300000 250000

1 200000 1000003 100000 ndash

Limited to max 200000 cycles for heating systems

9 1 VADOutlet pressure pd VAD-25 25 ndash 25 mbar (1 ndash 10 WC) VAD-50 20 ndash 50 mbar (8 ndash 20 WC) VAD-100 35 ndash 100 mbar (14 ndash 40 WC)Combustion chamber control pressure psc (connection psa)

-20 to +20 mbar (-78 to +78 WC)

VAD

pu

pd

(psa)

9 2 VAGOutlet pressure pd 05 ndash 100 mbar (02 ndash 40 WC)Air control pressure psa 05 ndash 100 mbar (02 ndash 40 WC)

Adjusting range at low fire plusmn5 mbar (plusmn2 WC)Transmission ratio of gas to air 11The inlet pressure must always be higher than the air control pressure psa + pressure loss ∆p + 5 mbar (2 WC)

VAGpd

pu

psa

psa

VAGK 1 x 18 coupling for plastic hose (internal dia 39 mm (015) external dia 61 mm (024)) or VAGE 1 x 18 compression fitting for 6 times 1 tube or VAGA 1 x NPT 18 adapter or VAGN zero governor with breathing orifice

9 3 VAH VRHAir control pressure psa 06 ndash 100 mbar (024 ndash 40 WC) Differential air pressure ∆psa (psa - psa-) 06 ndash 50 mbar (024 ndash 197 WC) Differential gas pressure ∆pd (pd - pd-) 06 ndash 50 mbar (024 ndash 197 WC)Transmission ratio of gas to air 11The inlet pressure must always be higher than the differen-tial air pressure ∆psa + pressure loss ∆p + max gas pres-sure on burner + 5 mbar (2 WC)Adjusting range at low fire plusmn5 mbar (plusmn2 WC)

Technical data

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 48

VAHVRH

pd-

pu

psa-

psa

Connection of the air control pressure psaVAHE VRHE 3 x 18 compression fitting for 6 times 1 tube or VAHA VRHA 3 x NPT 18 adapter

9 4 VAVOutlet pressure pd 05 ndash 30 mbar (02 ndash 117 WC)Air control pressure psa 04 ndash 30 mbar (015 ndash 117 WC)Combustion chamber control pressure psc

-20 to +20 mbar (-78 to +78 WC)Min control pressure differential psa - psc 04 mbar (015 WC)Min pressure differential pd - psc 05 mbar (02 WC)Adjusting range at low fire plusmn15 mbar (plusmn06 WC)Transmission ratio of gas to air 061 to 31The inlet pressure pu must always be higher than the air control pressure psa times transmission ratio V + pressure loss ∆p + 15 mbar (06 WC)

pu

pd psapsc

VAV

VAVK 2 x plastic hose couplings (internal dia 39 mm (015) external dia 61 mm (024)) or VAVE 2 x 18 compression fitting for 6 times 1 tube or VAVA 2 x NPT 18 adapter

Technical data

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 49

9 5 Safety-specific characteristic values for VAx 1 ndash 3For SILSuitable for Safety Integrity Level SIL 1 2 3

Diagnostic coverage DC 0

Type of subsystem Type A to EN 61508-2 74312

Operating mode High demand mode pursu-ant to EN 61508-4 3512

For PLSuitable for Performance Level PL a b c d e

Category B 1 2 3 4Common cause failure CCF gt 65Application of essential safety requirements Satisfied

Application of tried-and-tested safety requirements Satisfied

For SIL and PL

B10d value

Operating cyclesVAD VAG VAV VAH 1 10094360VAD VAG VAV VAH 2 8229021VAD VAG VAV VAH 3 6363683

Hardware fault tolerance (1 valve) HFT 0

Hardware fault tolerance (2 valves) HFT 1

Safe failure fraction SFF gt 90Fraction of undetected com-mon cause failures β ge 2

Max service life under operating conditions10 years after date of production plus max 12 year in stor-age prior to first use or once the given number of operating cycles has been reached depending on which is achieved firstThe devices are suitable for single-channel systems (HFT = 0) up to SIL 2PL d and up to SIL 3PL e when two re-dundant valves are installed in a double-channel architecture (HFT = 1) provided that the complete system complies with the requirements of EN 61508ISO 13849

For a glossary of terms see page 53 (Glossary)

Technical data

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 50

nop 1hnop 1a

sB10d

T10d aPFHD (1 VAx) 1h

PFHD (2 VAx) 1h

PFDavg (1 VAx)

PFDavg (2 VAx)

Technical data gt Safety-specific characteristic values for VAx 1 ndash 3

9 5 1 Determining the PFHD value the λD value and the MTTFd value

PFHD = λD = x nop= 1MTTFd

01B10d

PFDavg = x λD x 24 x 365 x T10d 12

Type

Cycle time

suitable for

suitable for

PFHD = Probability of dangerous failure (HDM = high de-mand mode) [1hour]PFDavg = Average probability of dangerous failure on de-mand (LDM = low demand mode)λD = Mean dangerous failure rate [1hour]MTTFd = Mean time to dangerous failure [hours]nop = Demand rate (mean number of annual operations) [1hour]

9 5 2 Calculating the PFHD and PFDavg

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 51

VAD VAG VAH VAV

H1

Rp frac14(NPT frac14)

H2

E

LF

F

H4

H3

B

VAxS VAxF

L2G

G

Technical data

9 6 Dimensions

Type

Connec-tion Dimensions

WeightRpNPT DN

L L2 E F G H1 H2 H3 H4 Bmm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch kg lbs

VAx 115 12 15 75 29 ndash ndash 75 29 15 06 ndash ndash 143 56 82 32 161 63 117 46 97 38 18 40VAH 115 12 15 75 29 ndash ndash 75 29 15 06 ndash ndash 143 56 100 39 161 63 135 53 97 38 2 44VAx 120 34 20 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 82 33 161 63 117 46 97 38 19 42VAH 120 34 20 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 100 39 161 63 135 53 97 38 21 46VAx 125 1 25 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 82 33 161 63 117 46 97 38 19 42VAH 125 1 25 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 100 39 161 63 135 53 97 38 21 46VAx 240 112 40 128 50 200 79 85 33 29 11 66 26 170 67 112 44 191 75 162 64 125 49 44 97VAH 240 112 40 128 50 200 79 85 33 29 11 66 26 170 67 132 52 191 75 182 72 125 49 47 104VAx 350 2 50 155 61 230 91 85 33 36 14 74 29 180 70 135 53 201 79 196 77 160 63 61 134VAH 350 2 50 155 61 230 91 85 33 36 14 74 29 180 70 156 61 201 79 217 85 160 63 64 141

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 52

10 Converting unitssee wwwadlatusorg

11 Maintenance cyclesAt least once per annum at least twice per annum for biologi-cally produced methaneIf the flow rate drops clean the strainer

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 53

12 Glossary12 1 Diagnostic coverage DCMeasure of the effectiveness of diagnostics which may be determined as the ratio between the failure rate of detected dangerous failures and the failure rate of total dangerous failuresNOTE Diagnostic coverage can exist for the whole or parts of a safety-related system For example diagnostic cover-age could exist for sensors andor logic system andor final elements Unit see EN ISO 13849-12008

12 2 Mode of operationHigh demand mode or continuous modeOperating mode where the frequency of demands for opera-tion made on a safety-related system is greater than one per year or greater than twice the proof-test frequencysee EN 61508-42008

12 3 CategoryClassification of the safety-related parts of a control system in respect of their resistance to faults and their subsequent behaviour in the fault condition and which is achieved by the structural arrangement of the parts fault detection andor by their reliability see EN ISO 13849-12008

12 4 Common cause failure CCFFailures of different items resulting from a single event where these failures are not consequences of each othersee EN ISO 13849-12008

12 5 Fraction of undetected common cause failures β Fraction of undetected failures of redundant components due to a single event whereby these failures are not based on mutual causesNOTE β is expressed as a fraction in the equations and as a percentage elsewheresee EN 61508-62010

12 6 B10d valueMean number of cycles until 10 of the components fail dan-gerouslysee EN ISO 13849-12008

12 7 T10d valueMean time until 10 of the components fail dangerouslysee EN ISO 13849-12008

12 8 Hardware fault tolerance HFTA hardware fault tolerance of N means that N + 1 is the mini-mum number of faults that could cause a loss of the safety functionsee IEC 61508-22010

12 9 Mean dangerous failure rate λD Mean rate of dangerous failures during operation time (T10d) Unit 1hsee EN ISO 13849-12008

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 54

12 10 Safe failure fraction SFFFraction of safe failures related to all failures which are as-sumed to appearsee EN 13611A22011

12 11 Probability of dangerous failure PFHD Value describing the likelihood of dangerous failure per hour of a component for high demand mode or continuous mode Unit 1hsee EN 13611A22011

12 12 Mean time to dangerous failure MTTFd Expectation of the mean time to dangerous failuresee EN ISO 13849-12008

12 13 Demand rate nop Mean number of annual operationssee EN ISO 13849-12008

12 14 Average probability of dangerous failure on demand PFDavg (LDM = 1 ndash 10 switching cyclesyear)Average probability of a dangerous failure of the safety function on demand (LDM = low demand mode)see EN 61508-6

Glossary

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415

Finally we are offering you the opportunity to assess this ldquoTechnical Information (TI)rdquo and to give us your opinion so that we can improve our documents further and suit them to your needs

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Remarks

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Elster GmbH Postfach 2809 middot 49018 Osnabruumlck Strotheweg 1 middot 49504 Lotte (Buumlren) GermanyT +49 541 1214-0 F +49 541 1214-370 infokromschroedercomwwwkromschroedercom

The current addresses of our international agents are available on the Internetwwwkromschroederdeindexphpid=718ampL=1

We reserve the right to make technical modifications in the interests of progressCopyright copy 2015 Elster GmbH All rights reserved

Contact

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0325

0530

  • Pressure regulators with solenoid valve VAD VAG VAV VAH
  • Flow rate regulator VRH
  • Pressure regulators with double solenoid valve VCD VCG VCV VCH
  • Contents
  • 1 Application
    • 11 Examples of application
      • 111 Constant pressure control
      • 112 Constant pressure control with two gas solenoid valves
      • 113 Constant pressure control with max pressure switch
      • 114 Constant pressure control with non-controlled pilot gas outlet
      • 115 Modulating control
      • 116 Modulating control with two gas solenoid valves
      • 117 Modulating control with two gas solenoid valves and inlet pressure switch
      • 118 HighLow control
      • 119 Zero pressure control
      • 1110 Staged flow rate control
      • 1111 Continuous or staged flow rate control
      • 1112 Modulating control with variable airgas ratio control with gas solenoid valve
      • 1113 Modulating control in residential heat generation
          • 2 Certification
          • 3 Function
            • 31 VAD VAG VAH VRH VAV
              • 311 Pressure regulator for gas VAD
              • 312 Airgas ratio control VAG
              • 313 Flow rate regulators VAH VRH
              • 314 Variable airgas ratio control VAV
              • 315 Pressure regulator with gas solenoid valve VAxS position indicator with visual indicator
                • 32 Animation
                • 33 Connection diagram
                  • 331 VAx with M20 cable gland
                  • 332 VAx with plug
                  • 333 VAS with VADVAGVAHVAV with M20 cable gland
                  • 334 VAS with VADVAGVAHVAV with plug
                      • 4 Replacement possibilities for MODULINE pressure regulators with gas solenoid valve
                        • 41 GVS GVI GVIB GVR and GVRH are to be replaced by VAD VAG VAG+VAS VAH and VAV
                          • 5 Flow rate
                            • 51 Selection example for VAD
                              • 511 Calculate VAD
                                • 52 Selection example for VAG VAH VRH VAV
                                  • 521 CalculateVAG VxHVAV
                                    • 53 Selection example for zero governor VAGN
                                      • 531 Calculate VAGN
                                          • 6 Selection
                                            • 61 Selection table for pressure regulator with solenoid valve VAD
                                            • 62 Type code for VAD
                                            • 63 Selection table for airgas ratio control with solenoid valve VAG flow rate regulators VAH VRH
                                            • 64 Type code for VAG VAH VRH
                                            • 65 Selection table for variable airgas ratio control with solenoid valve VAV
                                            • 66 Type code for VAV
                                            • 67 Accessories
                                              • 7 Project planning information
                                                • 71 Installation
                                                  • 711 Installation position
                                                    • 72 Setting the low-fire rate on VAG VAH VRH VAV
                                                    • 73 Setting the high-fire rate on VAV
                                                      • 731 Calculation
                                                          • 8 Accessories
                                                            • 81 Gas pressure switch DGVC for VAx VRH
                                                            • 82 Gas pressure switch DGVCT for VAxT VRHT
                                                            • 83 Bypass valvepilot gas valve VAS 1
                                                              • 831 VAS 1 attached to VADVAGVAHVAV 1
                                                              • 832 VAS 1 attached to VADVAGVAHVAV 2 VADVAGVAHVAV 3
                                                              • 833 Flow rate
                                                                • 84 Bypass valvepilot gas valve VBY 8 for VADVAGVAHVAV 1
                                                                  • 841 Scope of delivery VBY 8I as bypass valve
                                                                  • 842 Scope of delivery VBY 8R as pilot gas valve
                                                                  • 843 Selection
                                                                  • 844 Type code
                                                                  • 845 Flow rate
                                                                  • 846 Technical data
                                                                    • 85 Tightness control TC 116V
                                                                    • 86 Pressure test points
                                                                    • 87 Cable gland set
                                                                    • 88 Seal set VA 1thinspndashthinsp3
                                                                    • 89 Differential pressure orifice
                                                                    • 810 Retaining frame
                                                                    • 811 Attachment block
                                                                    • 812 Gas control line
                                                                    • 813 Measuring orifice VMO
                                                                    • 814 Filter module VMF
                                                                    • 815 Fine-adjusting valve VMV
                                                                      • 9 Technical data
                                                                        • 91 VAD
                                                                        • 92 VAG
                                                                        • 93 VAH VRH
                                                                        • 94 VAV
                                                                        • 95 Safety-specific characteristic values for VAx 1thinspndashthinsp3
                                                                          • 951 Determining the PFHD value the λD value and the MTTFd value
                                                                          • 952 Calculating the PFHD and PFDavg
                                                                            • 96 Dimensions
                                                                              • 10 Converting units
                                                                              • 11 Maintenance cycles
                                                                              • 12 Glossary
                                                                                • 121 Diagnostic coverage DC
                                                                                • 122 Mode of operation
                                                                                • 123 Category
                                                                                • 124 Common cause failure CCF
                                                                                • 125 Fraction of undetected common cause failures β
                                                                                • 126 B10d value
                                                                                • 127 T10d value
                                                                                • 128 Hardware fault tolerance HFT
                                                                                • 129 Mean dangerous failure rate λD
                                                                                • 1210 Safe failure fraction SFF
                                                                                • 1211 Probability of dangerous failure PFHD
                                                                                • 1212 Mean time to dangerous failure MTTFd
                                                                                • 1213 Demand rate nop
                                                                                • 1214 Average probability of dangerous failure on demand PFDavg
                                                                                  • Feedback
                                                                                  • Contact
                                                                                      1. naechste_Seite 24
                                                                                      2. naechste Seite 18
                                                                                      3. naechste Seite 6
                                                                                      4. naechste Seite 16
                                                                                      5. naechste Seite 14
                                                                                      6. naechste Seite 25
                                                                                      7. naechste_Seite 11
                                                                                      8. naechste_Seite 17
                                                                                      9. fbArbeitspunkt_Min Ja
                                                                                      10. fbArbeitspunkt Ja
                                                                                      11. ftProgramm Standard-Programm
                                                                                      12. fz_kv
                                                                                      13. fz_pe 80
                                                                                      14. fz_pG 60
                                                                                      15. fzDelta_p_Soll 20
                                                                                      16. ftEinheit_Druck mbar
                                                                                      17. fatTyp [115]
                                                                                      18. fbArbeitspunkt_Min_2 Ja
                                                                                      19. fbArbeitspunkt_2 Ja
                                                                                      20. ftRegler_Typ VAG
                                                                                      21. ftProgramm_2 Standard-Programm
                                                                                      22. fz_kv_2
                                                                                      23. fatMedium [08]
                                                                                      24. fzDichte 08
                                                                                      25. ftEinheit_Dichte kgm3
                                                                                      26. fzV_Norm 30
                                                                                      27. ftEinheit_Volstrom m3h
                                                                                      28. fz_pe_2 80
                                                                                      29. fz_pG_2 60
                                                                                      30. fzDelta_p_Soll_2 20
                                                                                      31. ftEinheit_Druck2 [mbar]
                                                                                      32. ftEinheit_Geschw [ms]
                                                                                      33. fatTyp_2 [10954451150103322]
                                                                                      34. fbArbeitspunkt_Min_3 Ja
                                                                                      35. fbArbeitspunkt_3 Ja
                                                                                      36. ftProgramm_3 Standard-Programm
                                                                                      37. fz_kv_3
                                                                                      38. fz_pe_3 20
                                                                                      39. fz_pG_3 0
                                                                                      40. fzDelta_p_Soll_3 20
                                                                                      41. fatTyp_3 [123]
                                                                                      42. fatSchaltleistung [6363683]
                                                                                      43. fz_nop_Stunde 1
                                                                                      44. fz_nop_Jahr 8760
                                                                                      45. fzZyklus 3600
                                                                                      46. fzB10d 6363683
                                                                                      47. fzT10d 10
                                                                                      48. fzPFHd_1V 15714170551864384e-8
                                                                                      49. fzPFDavg_1V
                                                                                      50. ftGeeignet_1V PL d SIL 2
                                                                                      51. fzPFHd_2V 33505832253532625e-10
                                                                                      52. fzPFDavg_2V
                                                                                      53. ftGeeignet_2V PL e SIL 3
                                                                                      54. ftUebersicht Off
                                                                                      55. ftVerstaendlichkeit Off
                                                                                      56. ftFehlende_Info
                                                                                      57. ftUmfang Off
                                                                                      58. ftVerwendung_1 Off
                                                                                      59. ftVerwendung_2 Off
                                                                                      60. ftVerwendung_3 Off
                                                                                      61. ftVerwendung_4 Off
                                                                                      62. ftNavigation Off
                                                                                      63. ftTaetigkeitsbereich Off
                                                                                      64. ftBemerkung
                                                                                      65. Michael Rehkamp Elster Kromschroumlder>btnSenden
Page 42: VAD, VAG, VAV, VAH, VRH, VCD, VCG, VCV, VCH · PDF fileVAD, VAG, VAH, VAV, VRH, VCD, VCG, VCV, VCH · Edition 04.15 6 VAD VAD VAS 1 .1 Examples of application 1 .1 .1 Constant pressure

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 42

TC 116VB C

56(22)

49(193)

27(106)

A

A

VCx 1 VCx 2VCx 3

8 5 Tightness control TC 116Vfor VAx 1 ndash 3An adapter plate is required to attach the tightness control to the right- or left-hand side of the pressure regulator with gas solenoid valveScope of delivery A 1 times adapter plate B 2 times O-rings C 2 times retaining screwsFor attachment to left-hand side Order No 74922391 right-hand side Order No 74921995

8 6 Pressure test pointsTest points to check the inlet pressure pu and outlet pressure pdScope of delivery 1 x pressure test points with 1 x profiled sealing rings Order No 74923390

8 7 Cable gland setWhen wiring a double solenoid valve with pressure regula-tor VCx the connection boxes are to be connected using a cable gland setThe cable gland set can only be used if the connection boxes are at the same height and on the same side and if both valves are equipped either with or without a proof of closure switchVA 1 Order No 74921985 VA 2 Order No 74921986 VA 3 Order No 74921987

Accessories

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 43

A B

D

C

Accessories

8 9 Differential pressure orifice

Size PipeDN

Differential pressure orifi cewith outlet dia

1 15 17 mm 0671 20 25 mm 0981 25 30 mm 1182 40 46 mm 1813 50 58 mm 228

If pressure regulator VADVAGVAV 1 is retrofitted upstream of gas solenoid valve VAS 1 a DN 25 differential pressure orifice with outlet opening d = 30 mm (118) must be inserted at the outlet of the pressure regulatorIn the case of pressure regulator VAx 115 or VAx 120 the DN 25 differential pressure orifice must be ordered separately and retrofitted Order No 74922240

8 8 Seal set VA 1 ndash 3VA 1 Order No 74921988 VA 2 Order No 74921989 VA 3 Order No 74921990Scope of deliveryA 1 times double block seal B 2 times O-rings (flange) C 2 times O-rings (pressure switch) for pressure test pointscrew plug D 2 times sealing rings (flat sealing) and 2 times profiled sealing rings

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 44

BA

C

pd-

8 11 Attachment blockFor locked installation of pressure gauge and other acces-soriesScope of delivery A 1 times attachment block B 2 times self-tapping screws for installation C 2 times O-rings

Accessories

8 10 Retaining frameIn the event that a pressure regulator VAx is installed at a later point upstream of a gas solenoid valve VAS a measur-ing orifice VMO or a fine-adjusting valve VMV the retaining frame must be fitted at the inlet of the second device in order to fasten the differential pressure orifice at the regulator outlet Order the retaining frame separatelyRetaining frame for Size 1 Order No 74923029 Size 2 Order No 74923030 Size 3 Order No 74923031

8 12 Gas control lineFine-adjusting valve VMV can be installed on the flow rate regulator VAH for fine adjustment of the gas flow rateThe gas control line for gas outlet pressure pd- is available with 2 18 compression fittingsSize 1 Order No 74924458 Size 2 Order No 74924459

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 45

8 13 Measuring orifice VMOThe measuring orifice VMO is designed to reduce the gas and air flow rates and is installed downstream of the valVario control The measuring orifice is available with Rp internal thread (NPT internal thread) or flange to ISO 7005See wwwdocuthekcom Elster Kromschroumlder Krom-schroumlder LBE Products 03 Valves and butterfly valves valVario accessories Type of document Technical Informa-tion VMO

Accessories

8 14 Filter module VMFUsing the filter module VMF the gas flow upstream of the gas solenoid valve VAS and the airgas ratio control is cleaned The filter module is available with Rp internal thread (NPT internal thread) or flange to ISO 7005 and can also be supplied with fitted pressure switch as an optionSee wwwdocuthekcom Elster Kromschroumlder Krom-schroumlder LBE Products 03 Valves and butterfly valves valVario accessories Type of document Technical Informa-tion VMF

8 15 Fine-adjusting valve VMVThe flow rate is set using the fine-adjusting valve VMV The fine-adjusting valve is available with Rp internal thread (NPT internal thread) or flange to ISO 7005See wwwdocuthekcom Elster Kromschroumlder Krom-schroumlder LBE Products 03 Valves and butterfly valves valVario accessories Type of document Technical Infor-mation VMV

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 46

9 Technical dataGas types natural gas LPG (gaseous) biologically produced methane (max 01 -by-vol H2S) or clean air other gases on request The gas must be clean and dry in all temperature conditions and must not contain condensateCE and FM approved UL listed max inlet pressure pu 10 ndash 500 mbar (4 ndash 200 WC) FM approved (230 V AC 120 V AC 24 V DC) non opera-tional pressure 700 mbar (10 psig)ANSICSA approved (230 V AC 120 V AC 24 V DC) up to 350 mbar (5 psig)Opening time of the solenoid valve quick opening le 05 s Closing time quick closing lt 1 sMedium and ambient temperatures -20 to +60degC (-4 to +140degF) no condensation permittedStorage temperature -20 to +40degC (-4 to +104degF)Enclosure IP 65Valve housing aluminium valve seal NBRConnection flanges with internal thread Rp to ISO 7-1 NPT to ANSIASMESafety valve Class A to EN 161 Factory Mutual Research Class 7400 Process Control Valves (230 V AC 120 V AC 24 V DC) ANSI Z2121 and CSA 65 ANSI Z2118 and CSA 63Control class A to EN 88-1Control range up to 101

Mains voltage 230 V AC +10-15 5060 Hz 200 V AC +10-15 5060 Hz 120 V AC +10-15 5060 Hz 100 V AC +10-15 5060 Hz 24 V DC plusmn20Duty cycle 100Power factor of the solenoid coil cos φ = 09Power consumption

Type Voltage Power

VAx 1

24 V DC 25 W ndash100 V AC 25 W (26 VA)120 V AC 25 W (26 VA)200 V AC 25 W (26 VA)230 V AC 25 W (26 VA)

VAx 2 VAx 3

24 V DC 36 W ndash100 V AC 36 W (40 VA)120 V AC 40 W (44 VA)200 V AC 40 W (44 VA)230 V AC 40 W (44 VA)

VBY24 V DC 8 W ndash

120 V AC 8 W ndash230 V AC 95 W ndash

Cable gland M20 times 15Electrical connection cable with max 25 mm2 (AWG 12) or plug with socket to EN 175301-803

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 47

Position indicator contact rating

Type Voltage Min current(resistive load)

Max current(resistive load)

VAxS VCxS 12 ndash 250 V AC 5060 Hz 100 mA 3 AVAxG VCxG 12 ndash 30 V DC 2 mA 01 A

Position indicator switching frequency max 5 times per minute

Switching current [A]

Switching cyclescos φ = 1 cos φ = 06

01 500000 50000005 300000 250000

1 200000 1000003 100000 ndash

Limited to max 200000 cycles for heating systems

9 1 VADOutlet pressure pd VAD-25 25 ndash 25 mbar (1 ndash 10 WC) VAD-50 20 ndash 50 mbar (8 ndash 20 WC) VAD-100 35 ndash 100 mbar (14 ndash 40 WC)Combustion chamber control pressure psc (connection psa)

-20 to +20 mbar (-78 to +78 WC)

VAD

pu

pd

(psa)

9 2 VAGOutlet pressure pd 05 ndash 100 mbar (02 ndash 40 WC)Air control pressure psa 05 ndash 100 mbar (02 ndash 40 WC)

Adjusting range at low fire plusmn5 mbar (plusmn2 WC)Transmission ratio of gas to air 11The inlet pressure must always be higher than the air control pressure psa + pressure loss ∆p + 5 mbar (2 WC)

VAGpd

pu

psa

psa

VAGK 1 x 18 coupling for plastic hose (internal dia 39 mm (015) external dia 61 mm (024)) or VAGE 1 x 18 compression fitting for 6 times 1 tube or VAGA 1 x NPT 18 adapter or VAGN zero governor with breathing orifice

9 3 VAH VRHAir control pressure psa 06 ndash 100 mbar (024 ndash 40 WC) Differential air pressure ∆psa (psa - psa-) 06 ndash 50 mbar (024 ndash 197 WC) Differential gas pressure ∆pd (pd - pd-) 06 ndash 50 mbar (024 ndash 197 WC)Transmission ratio of gas to air 11The inlet pressure must always be higher than the differen-tial air pressure ∆psa + pressure loss ∆p + max gas pres-sure on burner + 5 mbar (2 WC)Adjusting range at low fire plusmn5 mbar (plusmn2 WC)

Technical data

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 48

VAHVRH

pd-

pu

psa-

psa

Connection of the air control pressure psaVAHE VRHE 3 x 18 compression fitting for 6 times 1 tube or VAHA VRHA 3 x NPT 18 adapter

9 4 VAVOutlet pressure pd 05 ndash 30 mbar (02 ndash 117 WC)Air control pressure psa 04 ndash 30 mbar (015 ndash 117 WC)Combustion chamber control pressure psc

-20 to +20 mbar (-78 to +78 WC)Min control pressure differential psa - psc 04 mbar (015 WC)Min pressure differential pd - psc 05 mbar (02 WC)Adjusting range at low fire plusmn15 mbar (plusmn06 WC)Transmission ratio of gas to air 061 to 31The inlet pressure pu must always be higher than the air control pressure psa times transmission ratio V + pressure loss ∆p + 15 mbar (06 WC)

pu

pd psapsc

VAV

VAVK 2 x plastic hose couplings (internal dia 39 mm (015) external dia 61 mm (024)) or VAVE 2 x 18 compression fitting for 6 times 1 tube or VAVA 2 x NPT 18 adapter

Technical data

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 49

9 5 Safety-specific characteristic values for VAx 1 ndash 3For SILSuitable for Safety Integrity Level SIL 1 2 3

Diagnostic coverage DC 0

Type of subsystem Type A to EN 61508-2 74312

Operating mode High demand mode pursu-ant to EN 61508-4 3512

For PLSuitable for Performance Level PL a b c d e

Category B 1 2 3 4Common cause failure CCF gt 65Application of essential safety requirements Satisfied

Application of tried-and-tested safety requirements Satisfied

For SIL and PL

B10d value

Operating cyclesVAD VAG VAV VAH 1 10094360VAD VAG VAV VAH 2 8229021VAD VAG VAV VAH 3 6363683

Hardware fault tolerance (1 valve) HFT 0

Hardware fault tolerance (2 valves) HFT 1

Safe failure fraction SFF gt 90Fraction of undetected com-mon cause failures β ge 2

Max service life under operating conditions10 years after date of production plus max 12 year in stor-age prior to first use or once the given number of operating cycles has been reached depending on which is achieved firstThe devices are suitable for single-channel systems (HFT = 0) up to SIL 2PL d and up to SIL 3PL e when two re-dundant valves are installed in a double-channel architecture (HFT = 1) provided that the complete system complies with the requirements of EN 61508ISO 13849

For a glossary of terms see page 53 (Glossary)

Technical data

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 50

nop 1hnop 1a

sB10d

T10d aPFHD (1 VAx) 1h

PFHD (2 VAx) 1h

PFDavg (1 VAx)

PFDavg (2 VAx)

Technical data gt Safety-specific characteristic values for VAx 1 ndash 3

9 5 1 Determining the PFHD value the λD value and the MTTFd value

PFHD = λD = x nop= 1MTTFd

01B10d

PFDavg = x λD x 24 x 365 x T10d 12

Type

Cycle time

suitable for

suitable for

PFHD = Probability of dangerous failure (HDM = high de-mand mode) [1hour]PFDavg = Average probability of dangerous failure on de-mand (LDM = low demand mode)λD = Mean dangerous failure rate [1hour]MTTFd = Mean time to dangerous failure [hours]nop = Demand rate (mean number of annual operations) [1hour]

9 5 2 Calculating the PFHD and PFDavg

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 51

VAD VAG VAH VAV

H1

Rp frac14(NPT frac14)

H2

E

LF

F

H4

H3

B

VAxS VAxF

L2G

G

Technical data

9 6 Dimensions

Type

Connec-tion Dimensions

WeightRpNPT DN

L L2 E F G H1 H2 H3 H4 Bmm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch kg lbs

VAx 115 12 15 75 29 ndash ndash 75 29 15 06 ndash ndash 143 56 82 32 161 63 117 46 97 38 18 40VAH 115 12 15 75 29 ndash ndash 75 29 15 06 ndash ndash 143 56 100 39 161 63 135 53 97 38 2 44VAx 120 34 20 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 82 33 161 63 117 46 97 38 19 42VAH 120 34 20 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 100 39 161 63 135 53 97 38 21 46VAx 125 1 25 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 82 33 161 63 117 46 97 38 19 42VAH 125 1 25 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 100 39 161 63 135 53 97 38 21 46VAx 240 112 40 128 50 200 79 85 33 29 11 66 26 170 67 112 44 191 75 162 64 125 49 44 97VAH 240 112 40 128 50 200 79 85 33 29 11 66 26 170 67 132 52 191 75 182 72 125 49 47 104VAx 350 2 50 155 61 230 91 85 33 36 14 74 29 180 70 135 53 201 79 196 77 160 63 61 134VAH 350 2 50 155 61 230 91 85 33 36 14 74 29 180 70 156 61 201 79 217 85 160 63 64 141

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 52

10 Converting unitssee wwwadlatusorg

11 Maintenance cyclesAt least once per annum at least twice per annum for biologi-cally produced methaneIf the flow rate drops clean the strainer

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 53

12 Glossary12 1 Diagnostic coverage DCMeasure of the effectiveness of diagnostics which may be determined as the ratio between the failure rate of detected dangerous failures and the failure rate of total dangerous failuresNOTE Diagnostic coverage can exist for the whole or parts of a safety-related system For example diagnostic cover-age could exist for sensors andor logic system andor final elements Unit see EN ISO 13849-12008

12 2 Mode of operationHigh demand mode or continuous modeOperating mode where the frequency of demands for opera-tion made on a safety-related system is greater than one per year or greater than twice the proof-test frequencysee EN 61508-42008

12 3 CategoryClassification of the safety-related parts of a control system in respect of their resistance to faults and their subsequent behaviour in the fault condition and which is achieved by the structural arrangement of the parts fault detection andor by their reliability see EN ISO 13849-12008

12 4 Common cause failure CCFFailures of different items resulting from a single event where these failures are not consequences of each othersee EN ISO 13849-12008

12 5 Fraction of undetected common cause failures β Fraction of undetected failures of redundant components due to a single event whereby these failures are not based on mutual causesNOTE β is expressed as a fraction in the equations and as a percentage elsewheresee EN 61508-62010

12 6 B10d valueMean number of cycles until 10 of the components fail dan-gerouslysee EN ISO 13849-12008

12 7 T10d valueMean time until 10 of the components fail dangerouslysee EN ISO 13849-12008

12 8 Hardware fault tolerance HFTA hardware fault tolerance of N means that N + 1 is the mini-mum number of faults that could cause a loss of the safety functionsee IEC 61508-22010

12 9 Mean dangerous failure rate λD Mean rate of dangerous failures during operation time (T10d) Unit 1hsee EN ISO 13849-12008

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 54

12 10 Safe failure fraction SFFFraction of safe failures related to all failures which are as-sumed to appearsee EN 13611A22011

12 11 Probability of dangerous failure PFHD Value describing the likelihood of dangerous failure per hour of a component for high demand mode or continuous mode Unit 1hsee EN 13611A22011

12 12 Mean time to dangerous failure MTTFd Expectation of the mean time to dangerous failuresee EN ISO 13849-12008

12 13 Demand rate nop Mean number of annual operationssee EN ISO 13849-12008

12 14 Average probability of dangerous failure on demand PFDavg (LDM = 1 ndash 10 switching cyclesyear)Average probability of a dangerous failure of the safety function on demand (LDM = low demand mode)see EN 61508-6

Glossary

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415

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Elster GmbH Postfach 2809 middot 49018 Osnabruumlck Strotheweg 1 middot 49504 Lotte (Buumlren) GermanyT +49 541 1214-0 F +49 541 1214-370 infokromschroedercomwwwkromschroedercom

The current addresses of our international agents are available on the Internetwwwkromschroederdeindexphpid=718ampL=1

We reserve the right to make technical modifications in the interests of progressCopyright copy 2015 Elster GmbH All rights reserved

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0325

0530

  • Pressure regulators with solenoid valve VAD VAG VAV VAH
  • Flow rate regulator VRH
  • Pressure regulators with double solenoid valve VCD VCG VCV VCH
  • Contents
  • 1 Application
    • 11 Examples of application
      • 111 Constant pressure control
      • 112 Constant pressure control with two gas solenoid valves
      • 113 Constant pressure control with max pressure switch
      • 114 Constant pressure control with non-controlled pilot gas outlet
      • 115 Modulating control
      • 116 Modulating control with two gas solenoid valves
      • 117 Modulating control with two gas solenoid valves and inlet pressure switch
      • 118 HighLow control
      • 119 Zero pressure control
      • 1110 Staged flow rate control
      • 1111 Continuous or staged flow rate control
      • 1112 Modulating control with variable airgas ratio control with gas solenoid valve
      • 1113 Modulating control in residential heat generation
          • 2 Certification
          • 3 Function
            • 31 VAD VAG VAH VRH VAV
              • 311 Pressure regulator for gas VAD
              • 312 Airgas ratio control VAG
              • 313 Flow rate regulators VAH VRH
              • 314 Variable airgas ratio control VAV
              • 315 Pressure regulator with gas solenoid valve VAxS position indicator with visual indicator
                • 32 Animation
                • 33 Connection diagram
                  • 331 VAx with M20 cable gland
                  • 332 VAx with plug
                  • 333 VAS with VADVAGVAHVAV with M20 cable gland
                  • 334 VAS with VADVAGVAHVAV with plug
                      • 4 Replacement possibilities for MODULINE pressure regulators with gas solenoid valve
                        • 41 GVS GVI GVIB GVR and GVRH are to be replaced by VAD VAG VAG+VAS VAH and VAV
                          • 5 Flow rate
                            • 51 Selection example for VAD
                              • 511 Calculate VAD
                                • 52 Selection example for VAG VAH VRH VAV
                                  • 521 CalculateVAG VxHVAV
                                    • 53 Selection example for zero governor VAGN
                                      • 531 Calculate VAGN
                                          • 6 Selection
                                            • 61 Selection table for pressure regulator with solenoid valve VAD
                                            • 62 Type code for VAD
                                            • 63 Selection table for airgas ratio control with solenoid valve VAG flow rate regulators VAH VRH
                                            • 64 Type code for VAG VAH VRH
                                            • 65 Selection table for variable airgas ratio control with solenoid valve VAV
                                            • 66 Type code for VAV
                                            • 67 Accessories
                                              • 7 Project planning information
                                                • 71 Installation
                                                  • 711 Installation position
                                                    • 72 Setting the low-fire rate on VAG VAH VRH VAV
                                                    • 73 Setting the high-fire rate on VAV
                                                      • 731 Calculation
                                                          • 8 Accessories
                                                            • 81 Gas pressure switch DGVC for VAx VRH
                                                            • 82 Gas pressure switch DGVCT for VAxT VRHT
                                                            • 83 Bypass valvepilot gas valve VAS 1
                                                              • 831 VAS 1 attached to VADVAGVAHVAV 1
                                                              • 832 VAS 1 attached to VADVAGVAHVAV 2 VADVAGVAHVAV 3
                                                              • 833 Flow rate
                                                                • 84 Bypass valvepilot gas valve VBY 8 for VADVAGVAHVAV 1
                                                                  • 841 Scope of delivery VBY 8I as bypass valve
                                                                  • 842 Scope of delivery VBY 8R as pilot gas valve
                                                                  • 843 Selection
                                                                  • 844 Type code
                                                                  • 845 Flow rate
                                                                  • 846 Technical data
                                                                    • 85 Tightness control TC 116V
                                                                    • 86 Pressure test points
                                                                    • 87 Cable gland set
                                                                    • 88 Seal set VA 1thinspndashthinsp3
                                                                    • 89 Differential pressure orifice
                                                                    • 810 Retaining frame
                                                                    • 811 Attachment block
                                                                    • 812 Gas control line
                                                                    • 813 Measuring orifice VMO
                                                                    • 814 Filter module VMF
                                                                    • 815 Fine-adjusting valve VMV
                                                                      • 9 Technical data
                                                                        • 91 VAD
                                                                        • 92 VAG
                                                                        • 93 VAH VRH
                                                                        • 94 VAV
                                                                        • 95 Safety-specific characteristic values for VAx 1thinspndashthinsp3
                                                                          • 951 Determining the PFHD value the λD value and the MTTFd value
                                                                          • 952 Calculating the PFHD and PFDavg
                                                                            • 96 Dimensions
                                                                              • 10 Converting units
                                                                              • 11 Maintenance cycles
                                                                              • 12 Glossary
                                                                                • 121 Diagnostic coverage DC
                                                                                • 122 Mode of operation
                                                                                • 123 Category
                                                                                • 124 Common cause failure CCF
                                                                                • 125 Fraction of undetected common cause failures β
                                                                                • 126 B10d value
                                                                                • 127 T10d value
                                                                                • 128 Hardware fault tolerance HFT
                                                                                • 129 Mean dangerous failure rate λD
                                                                                • 1210 Safe failure fraction SFF
                                                                                • 1211 Probability of dangerous failure PFHD
                                                                                • 1212 Mean time to dangerous failure MTTFd
                                                                                • 1213 Demand rate nop
                                                                                • 1214 Average probability of dangerous failure on demand PFDavg
                                                                                  • Feedback
                                                                                  • Contact
                                                                                      1. naechste_Seite 24
                                                                                      2. naechste Seite 18
                                                                                      3. naechste Seite 6
                                                                                      4. naechste Seite 16
                                                                                      5. naechste Seite 14
                                                                                      6. naechste Seite 25
                                                                                      7. naechste_Seite 11
                                                                                      8. naechste_Seite 17
                                                                                      9. fbArbeitspunkt_Min Ja
                                                                                      10. fbArbeitspunkt Ja
                                                                                      11. ftProgramm Standard-Programm
                                                                                      12. fz_kv
                                                                                      13. fz_pe 80
                                                                                      14. fz_pG 60
                                                                                      15. fzDelta_p_Soll 20
                                                                                      16. ftEinheit_Druck mbar
                                                                                      17. fatTyp [115]
                                                                                      18. fbArbeitspunkt_Min_2 Ja
                                                                                      19. fbArbeitspunkt_2 Ja
                                                                                      20. ftRegler_Typ VAG
                                                                                      21. ftProgramm_2 Standard-Programm
                                                                                      22. fz_kv_2
                                                                                      23. fatMedium [08]
                                                                                      24. fzDichte 08
                                                                                      25. ftEinheit_Dichte kgm3
                                                                                      26. fzV_Norm 30
                                                                                      27. ftEinheit_Volstrom m3h
                                                                                      28. fz_pe_2 80
                                                                                      29. fz_pG_2 60
                                                                                      30. fzDelta_p_Soll_2 20
                                                                                      31. ftEinheit_Druck2 [mbar]
                                                                                      32. ftEinheit_Geschw [ms]
                                                                                      33. fatTyp_2 [10954451150103322]
                                                                                      34. fbArbeitspunkt_Min_3 Ja
                                                                                      35. fbArbeitspunkt_3 Ja
                                                                                      36. ftProgramm_3 Standard-Programm
                                                                                      37. fz_kv_3
                                                                                      38. fz_pe_3 20
                                                                                      39. fz_pG_3 0
                                                                                      40. fzDelta_p_Soll_3 20
                                                                                      41. fatTyp_3 [123]
                                                                                      42. fatSchaltleistung [6363683]
                                                                                      43. fz_nop_Stunde 1
                                                                                      44. fz_nop_Jahr 8760
                                                                                      45. fzZyklus 3600
                                                                                      46. fzB10d 6363683
                                                                                      47. fzT10d 10
                                                                                      48. fzPFHd_1V 15714170551864384e-8
                                                                                      49. fzPFDavg_1V
                                                                                      50. ftGeeignet_1V PL d SIL 2
                                                                                      51. fzPFHd_2V 33505832253532625e-10
                                                                                      52. fzPFDavg_2V
                                                                                      53. ftGeeignet_2V PL e SIL 3
                                                                                      54. ftUebersicht Off
                                                                                      55. ftVerstaendlichkeit Off
                                                                                      56. ftFehlende_Info
                                                                                      57. ftUmfang Off
                                                                                      58. ftVerwendung_1 Off
                                                                                      59. ftVerwendung_2 Off
                                                                                      60. ftVerwendung_3 Off
                                                                                      61. ftVerwendung_4 Off
                                                                                      62. ftNavigation Off
                                                                                      63. ftTaetigkeitsbereich Off
                                                                                      64. ftBemerkung
                                                                                      65. Michael Rehkamp Elster Kromschroumlder>btnSenden
Page 43: VAD, VAG, VAV, VAH, VRH, VCD, VCG, VCV, VCH · PDF fileVAD, VAG, VAH, VAV, VRH, VCD, VCG, VCV, VCH · Edition 04.15 6 VAD VAD VAS 1 .1 Examples of application 1 .1 .1 Constant pressure

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 43

A B

D

C

Accessories

8 9 Differential pressure orifice

Size PipeDN

Differential pressure orifi cewith outlet dia

1 15 17 mm 0671 20 25 mm 0981 25 30 mm 1182 40 46 mm 1813 50 58 mm 228

If pressure regulator VADVAGVAV 1 is retrofitted upstream of gas solenoid valve VAS 1 a DN 25 differential pressure orifice with outlet opening d = 30 mm (118) must be inserted at the outlet of the pressure regulatorIn the case of pressure regulator VAx 115 or VAx 120 the DN 25 differential pressure orifice must be ordered separately and retrofitted Order No 74922240

8 8 Seal set VA 1 ndash 3VA 1 Order No 74921988 VA 2 Order No 74921989 VA 3 Order No 74921990Scope of deliveryA 1 times double block seal B 2 times O-rings (flange) C 2 times O-rings (pressure switch) for pressure test pointscrew plug D 2 times sealing rings (flat sealing) and 2 times profiled sealing rings

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 44

BA

C

pd-

8 11 Attachment blockFor locked installation of pressure gauge and other acces-soriesScope of delivery A 1 times attachment block B 2 times self-tapping screws for installation C 2 times O-rings

Accessories

8 10 Retaining frameIn the event that a pressure regulator VAx is installed at a later point upstream of a gas solenoid valve VAS a measur-ing orifice VMO or a fine-adjusting valve VMV the retaining frame must be fitted at the inlet of the second device in order to fasten the differential pressure orifice at the regulator outlet Order the retaining frame separatelyRetaining frame for Size 1 Order No 74923029 Size 2 Order No 74923030 Size 3 Order No 74923031

8 12 Gas control lineFine-adjusting valve VMV can be installed on the flow rate regulator VAH for fine adjustment of the gas flow rateThe gas control line for gas outlet pressure pd- is available with 2 18 compression fittingsSize 1 Order No 74924458 Size 2 Order No 74924459

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 45

8 13 Measuring orifice VMOThe measuring orifice VMO is designed to reduce the gas and air flow rates and is installed downstream of the valVario control The measuring orifice is available with Rp internal thread (NPT internal thread) or flange to ISO 7005See wwwdocuthekcom Elster Kromschroumlder Krom-schroumlder LBE Products 03 Valves and butterfly valves valVario accessories Type of document Technical Informa-tion VMO

Accessories

8 14 Filter module VMFUsing the filter module VMF the gas flow upstream of the gas solenoid valve VAS and the airgas ratio control is cleaned The filter module is available with Rp internal thread (NPT internal thread) or flange to ISO 7005 and can also be supplied with fitted pressure switch as an optionSee wwwdocuthekcom Elster Kromschroumlder Krom-schroumlder LBE Products 03 Valves and butterfly valves valVario accessories Type of document Technical Informa-tion VMF

8 15 Fine-adjusting valve VMVThe flow rate is set using the fine-adjusting valve VMV The fine-adjusting valve is available with Rp internal thread (NPT internal thread) or flange to ISO 7005See wwwdocuthekcom Elster Kromschroumlder Krom-schroumlder LBE Products 03 Valves and butterfly valves valVario accessories Type of document Technical Infor-mation VMV

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 46

9 Technical dataGas types natural gas LPG (gaseous) biologically produced methane (max 01 -by-vol H2S) or clean air other gases on request The gas must be clean and dry in all temperature conditions and must not contain condensateCE and FM approved UL listed max inlet pressure pu 10 ndash 500 mbar (4 ndash 200 WC) FM approved (230 V AC 120 V AC 24 V DC) non opera-tional pressure 700 mbar (10 psig)ANSICSA approved (230 V AC 120 V AC 24 V DC) up to 350 mbar (5 psig)Opening time of the solenoid valve quick opening le 05 s Closing time quick closing lt 1 sMedium and ambient temperatures -20 to +60degC (-4 to +140degF) no condensation permittedStorage temperature -20 to +40degC (-4 to +104degF)Enclosure IP 65Valve housing aluminium valve seal NBRConnection flanges with internal thread Rp to ISO 7-1 NPT to ANSIASMESafety valve Class A to EN 161 Factory Mutual Research Class 7400 Process Control Valves (230 V AC 120 V AC 24 V DC) ANSI Z2121 and CSA 65 ANSI Z2118 and CSA 63Control class A to EN 88-1Control range up to 101

Mains voltage 230 V AC +10-15 5060 Hz 200 V AC +10-15 5060 Hz 120 V AC +10-15 5060 Hz 100 V AC +10-15 5060 Hz 24 V DC plusmn20Duty cycle 100Power factor of the solenoid coil cos φ = 09Power consumption

Type Voltage Power

VAx 1

24 V DC 25 W ndash100 V AC 25 W (26 VA)120 V AC 25 W (26 VA)200 V AC 25 W (26 VA)230 V AC 25 W (26 VA)

VAx 2 VAx 3

24 V DC 36 W ndash100 V AC 36 W (40 VA)120 V AC 40 W (44 VA)200 V AC 40 W (44 VA)230 V AC 40 W (44 VA)

VBY24 V DC 8 W ndash

120 V AC 8 W ndash230 V AC 95 W ndash

Cable gland M20 times 15Electrical connection cable with max 25 mm2 (AWG 12) or plug with socket to EN 175301-803

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 47

Position indicator contact rating

Type Voltage Min current(resistive load)

Max current(resistive load)

VAxS VCxS 12 ndash 250 V AC 5060 Hz 100 mA 3 AVAxG VCxG 12 ndash 30 V DC 2 mA 01 A

Position indicator switching frequency max 5 times per minute

Switching current [A]

Switching cyclescos φ = 1 cos φ = 06

01 500000 50000005 300000 250000

1 200000 1000003 100000 ndash

Limited to max 200000 cycles for heating systems

9 1 VADOutlet pressure pd VAD-25 25 ndash 25 mbar (1 ndash 10 WC) VAD-50 20 ndash 50 mbar (8 ndash 20 WC) VAD-100 35 ndash 100 mbar (14 ndash 40 WC)Combustion chamber control pressure psc (connection psa)

-20 to +20 mbar (-78 to +78 WC)

VAD

pu

pd

(psa)

9 2 VAGOutlet pressure pd 05 ndash 100 mbar (02 ndash 40 WC)Air control pressure psa 05 ndash 100 mbar (02 ndash 40 WC)

Adjusting range at low fire plusmn5 mbar (plusmn2 WC)Transmission ratio of gas to air 11The inlet pressure must always be higher than the air control pressure psa + pressure loss ∆p + 5 mbar (2 WC)

VAGpd

pu

psa

psa

VAGK 1 x 18 coupling for plastic hose (internal dia 39 mm (015) external dia 61 mm (024)) or VAGE 1 x 18 compression fitting for 6 times 1 tube or VAGA 1 x NPT 18 adapter or VAGN zero governor with breathing orifice

9 3 VAH VRHAir control pressure psa 06 ndash 100 mbar (024 ndash 40 WC) Differential air pressure ∆psa (psa - psa-) 06 ndash 50 mbar (024 ndash 197 WC) Differential gas pressure ∆pd (pd - pd-) 06 ndash 50 mbar (024 ndash 197 WC)Transmission ratio of gas to air 11The inlet pressure must always be higher than the differen-tial air pressure ∆psa + pressure loss ∆p + max gas pres-sure on burner + 5 mbar (2 WC)Adjusting range at low fire plusmn5 mbar (plusmn2 WC)

Technical data

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 48

VAHVRH

pd-

pu

psa-

psa

Connection of the air control pressure psaVAHE VRHE 3 x 18 compression fitting for 6 times 1 tube or VAHA VRHA 3 x NPT 18 adapter

9 4 VAVOutlet pressure pd 05 ndash 30 mbar (02 ndash 117 WC)Air control pressure psa 04 ndash 30 mbar (015 ndash 117 WC)Combustion chamber control pressure psc

-20 to +20 mbar (-78 to +78 WC)Min control pressure differential psa - psc 04 mbar (015 WC)Min pressure differential pd - psc 05 mbar (02 WC)Adjusting range at low fire plusmn15 mbar (plusmn06 WC)Transmission ratio of gas to air 061 to 31The inlet pressure pu must always be higher than the air control pressure psa times transmission ratio V + pressure loss ∆p + 15 mbar (06 WC)

pu

pd psapsc

VAV

VAVK 2 x plastic hose couplings (internal dia 39 mm (015) external dia 61 mm (024)) or VAVE 2 x 18 compression fitting for 6 times 1 tube or VAVA 2 x NPT 18 adapter

Technical data

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 49

9 5 Safety-specific characteristic values for VAx 1 ndash 3For SILSuitable for Safety Integrity Level SIL 1 2 3

Diagnostic coverage DC 0

Type of subsystem Type A to EN 61508-2 74312

Operating mode High demand mode pursu-ant to EN 61508-4 3512

For PLSuitable for Performance Level PL a b c d e

Category B 1 2 3 4Common cause failure CCF gt 65Application of essential safety requirements Satisfied

Application of tried-and-tested safety requirements Satisfied

For SIL and PL

B10d value

Operating cyclesVAD VAG VAV VAH 1 10094360VAD VAG VAV VAH 2 8229021VAD VAG VAV VAH 3 6363683

Hardware fault tolerance (1 valve) HFT 0

Hardware fault tolerance (2 valves) HFT 1

Safe failure fraction SFF gt 90Fraction of undetected com-mon cause failures β ge 2

Max service life under operating conditions10 years after date of production plus max 12 year in stor-age prior to first use or once the given number of operating cycles has been reached depending on which is achieved firstThe devices are suitable for single-channel systems (HFT = 0) up to SIL 2PL d and up to SIL 3PL e when two re-dundant valves are installed in a double-channel architecture (HFT = 1) provided that the complete system complies with the requirements of EN 61508ISO 13849

For a glossary of terms see page 53 (Glossary)

Technical data

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 50

nop 1hnop 1a

sB10d

T10d aPFHD (1 VAx) 1h

PFHD (2 VAx) 1h

PFDavg (1 VAx)

PFDavg (2 VAx)

Technical data gt Safety-specific characteristic values for VAx 1 ndash 3

9 5 1 Determining the PFHD value the λD value and the MTTFd value

PFHD = λD = x nop= 1MTTFd

01B10d

PFDavg = x λD x 24 x 365 x T10d 12

Type

Cycle time

suitable for

suitable for

PFHD = Probability of dangerous failure (HDM = high de-mand mode) [1hour]PFDavg = Average probability of dangerous failure on de-mand (LDM = low demand mode)λD = Mean dangerous failure rate [1hour]MTTFd = Mean time to dangerous failure [hours]nop = Demand rate (mean number of annual operations) [1hour]

9 5 2 Calculating the PFHD and PFDavg

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 51

VAD VAG VAH VAV

H1

Rp frac14(NPT frac14)

H2

E

LF

F

H4

H3

B

VAxS VAxF

L2G

G

Technical data

9 6 Dimensions

Type

Connec-tion Dimensions

WeightRpNPT DN

L L2 E F G H1 H2 H3 H4 Bmm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch kg lbs

VAx 115 12 15 75 29 ndash ndash 75 29 15 06 ndash ndash 143 56 82 32 161 63 117 46 97 38 18 40VAH 115 12 15 75 29 ndash ndash 75 29 15 06 ndash ndash 143 56 100 39 161 63 135 53 97 38 2 44VAx 120 34 20 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 82 33 161 63 117 46 97 38 19 42VAH 120 34 20 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 100 39 161 63 135 53 97 38 21 46VAx 125 1 25 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 82 33 161 63 117 46 97 38 19 42VAH 125 1 25 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 100 39 161 63 135 53 97 38 21 46VAx 240 112 40 128 50 200 79 85 33 29 11 66 26 170 67 112 44 191 75 162 64 125 49 44 97VAH 240 112 40 128 50 200 79 85 33 29 11 66 26 170 67 132 52 191 75 182 72 125 49 47 104VAx 350 2 50 155 61 230 91 85 33 36 14 74 29 180 70 135 53 201 79 196 77 160 63 61 134VAH 350 2 50 155 61 230 91 85 33 36 14 74 29 180 70 156 61 201 79 217 85 160 63 64 141

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 52

10 Converting unitssee wwwadlatusorg

11 Maintenance cyclesAt least once per annum at least twice per annum for biologi-cally produced methaneIf the flow rate drops clean the strainer

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 53

12 Glossary12 1 Diagnostic coverage DCMeasure of the effectiveness of diagnostics which may be determined as the ratio between the failure rate of detected dangerous failures and the failure rate of total dangerous failuresNOTE Diagnostic coverage can exist for the whole or parts of a safety-related system For example diagnostic cover-age could exist for sensors andor logic system andor final elements Unit see EN ISO 13849-12008

12 2 Mode of operationHigh demand mode or continuous modeOperating mode where the frequency of demands for opera-tion made on a safety-related system is greater than one per year or greater than twice the proof-test frequencysee EN 61508-42008

12 3 CategoryClassification of the safety-related parts of a control system in respect of their resistance to faults and their subsequent behaviour in the fault condition and which is achieved by the structural arrangement of the parts fault detection andor by their reliability see EN ISO 13849-12008

12 4 Common cause failure CCFFailures of different items resulting from a single event where these failures are not consequences of each othersee EN ISO 13849-12008

12 5 Fraction of undetected common cause failures β Fraction of undetected failures of redundant components due to a single event whereby these failures are not based on mutual causesNOTE β is expressed as a fraction in the equations and as a percentage elsewheresee EN 61508-62010

12 6 B10d valueMean number of cycles until 10 of the components fail dan-gerouslysee EN ISO 13849-12008

12 7 T10d valueMean time until 10 of the components fail dangerouslysee EN ISO 13849-12008

12 8 Hardware fault tolerance HFTA hardware fault tolerance of N means that N + 1 is the mini-mum number of faults that could cause a loss of the safety functionsee IEC 61508-22010

12 9 Mean dangerous failure rate λD Mean rate of dangerous failures during operation time (T10d) Unit 1hsee EN ISO 13849-12008

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 54

12 10 Safe failure fraction SFFFraction of safe failures related to all failures which are as-sumed to appearsee EN 13611A22011

12 11 Probability of dangerous failure PFHD Value describing the likelihood of dangerous failure per hour of a component for high demand mode or continuous mode Unit 1hsee EN 13611A22011

12 12 Mean time to dangerous failure MTTFd Expectation of the mean time to dangerous failuresee EN ISO 13849-12008

12 13 Demand rate nop Mean number of annual operationssee EN ISO 13849-12008

12 14 Average probability of dangerous failure on demand PFDavg (LDM = 1 ndash 10 switching cyclesyear)Average probability of a dangerous failure of the safety function on demand (LDM = low demand mode)see EN 61508-6

Glossary

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415

Finally we are offering you the opportunity to assess this ldquoTechnical Information (TI)rdquo and to give us your opinion so that we can improve our documents further and suit them to your needs

ClarityFound information quicklySearched for a long timeDidnrsquot find informationWhat is missing

ComprehensionCoherentToo complicatedNo answer

ScopeToo littleSufficientToo wideNo answer

No answer

NavigationI can find my way aroundI got ldquolostrdquoNo answer

UseTo get to know the productTo choose a productPlanningTo look for information

My scope of functionsTechnical departmentSalesNo answer

Remarks

(Adobe Reader 7 or higher required) wwwadobecom

Elster GmbH Postfach 2809 middot 49018 Osnabruumlck Strotheweg 1 middot 49504 Lotte (Buumlren) GermanyT +49 541 1214-0 F +49 541 1214-370 infokromschroedercomwwwkromschroedercom

The current addresses of our international agents are available on the Internetwwwkromschroederdeindexphpid=718ampL=1

We reserve the right to make technical modifications in the interests of progressCopyright copy 2015 Elster GmbH All rights reserved

Contact

Feedback

0325

0530

  • Pressure regulators with solenoid valve VAD VAG VAV VAH
  • Flow rate regulator VRH
  • Pressure regulators with double solenoid valve VCD VCG VCV VCH
  • Contents
  • 1 Application
    • 11 Examples of application
      • 111 Constant pressure control
      • 112 Constant pressure control with two gas solenoid valves
      • 113 Constant pressure control with max pressure switch
      • 114 Constant pressure control with non-controlled pilot gas outlet
      • 115 Modulating control
      • 116 Modulating control with two gas solenoid valves
      • 117 Modulating control with two gas solenoid valves and inlet pressure switch
      • 118 HighLow control
      • 119 Zero pressure control
      • 1110 Staged flow rate control
      • 1111 Continuous or staged flow rate control
      • 1112 Modulating control with variable airgas ratio control with gas solenoid valve
      • 1113 Modulating control in residential heat generation
          • 2 Certification
          • 3 Function
            • 31 VAD VAG VAH VRH VAV
              • 311 Pressure regulator for gas VAD
              • 312 Airgas ratio control VAG
              • 313 Flow rate regulators VAH VRH
              • 314 Variable airgas ratio control VAV
              • 315 Pressure regulator with gas solenoid valve VAxS position indicator with visual indicator
                • 32 Animation
                • 33 Connection diagram
                  • 331 VAx with M20 cable gland
                  • 332 VAx with plug
                  • 333 VAS with VADVAGVAHVAV with M20 cable gland
                  • 334 VAS with VADVAGVAHVAV with plug
                      • 4 Replacement possibilities for MODULINE pressure regulators with gas solenoid valve
                        • 41 GVS GVI GVIB GVR and GVRH are to be replaced by VAD VAG VAG+VAS VAH and VAV
                          • 5 Flow rate
                            • 51 Selection example for VAD
                              • 511 Calculate VAD
                                • 52 Selection example for VAG VAH VRH VAV
                                  • 521 CalculateVAG VxHVAV
                                    • 53 Selection example for zero governor VAGN
                                      • 531 Calculate VAGN
                                          • 6 Selection
                                            • 61 Selection table for pressure regulator with solenoid valve VAD
                                            • 62 Type code for VAD
                                            • 63 Selection table for airgas ratio control with solenoid valve VAG flow rate regulators VAH VRH
                                            • 64 Type code for VAG VAH VRH
                                            • 65 Selection table for variable airgas ratio control with solenoid valve VAV
                                            • 66 Type code for VAV
                                            • 67 Accessories
                                              • 7 Project planning information
                                                • 71 Installation
                                                  • 711 Installation position
                                                    • 72 Setting the low-fire rate on VAG VAH VRH VAV
                                                    • 73 Setting the high-fire rate on VAV
                                                      • 731 Calculation
                                                          • 8 Accessories
                                                            • 81 Gas pressure switch DGVC for VAx VRH
                                                            • 82 Gas pressure switch DGVCT for VAxT VRHT
                                                            • 83 Bypass valvepilot gas valve VAS 1
                                                              • 831 VAS 1 attached to VADVAGVAHVAV 1
                                                              • 832 VAS 1 attached to VADVAGVAHVAV 2 VADVAGVAHVAV 3
                                                              • 833 Flow rate
                                                                • 84 Bypass valvepilot gas valve VBY 8 for VADVAGVAHVAV 1
                                                                  • 841 Scope of delivery VBY 8I as bypass valve
                                                                  • 842 Scope of delivery VBY 8R as pilot gas valve
                                                                  • 843 Selection
                                                                  • 844 Type code
                                                                  • 845 Flow rate
                                                                  • 846 Technical data
                                                                    • 85 Tightness control TC 116V
                                                                    • 86 Pressure test points
                                                                    • 87 Cable gland set
                                                                    • 88 Seal set VA 1thinspndashthinsp3
                                                                    • 89 Differential pressure orifice
                                                                    • 810 Retaining frame
                                                                    • 811 Attachment block
                                                                    • 812 Gas control line
                                                                    • 813 Measuring orifice VMO
                                                                    • 814 Filter module VMF
                                                                    • 815 Fine-adjusting valve VMV
                                                                      • 9 Technical data
                                                                        • 91 VAD
                                                                        • 92 VAG
                                                                        • 93 VAH VRH
                                                                        • 94 VAV
                                                                        • 95 Safety-specific characteristic values for VAx 1thinspndashthinsp3
                                                                          • 951 Determining the PFHD value the λD value and the MTTFd value
                                                                          • 952 Calculating the PFHD and PFDavg
                                                                            • 96 Dimensions
                                                                              • 10 Converting units
                                                                              • 11 Maintenance cycles
                                                                              • 12 Glossary
                                                                                • 121 Diagnostic coverage DC
                                                                                • 122 Mode of operation
                                                                                • 123 Category
                                                                                • 124 Common cause failure CCF
                                                                                • 125 Fraction of undetected common cause failures β
                                                                                • 126 B10d value
                                                                                • 127 T10d value
                                                                                • 128 Hardware fault tolerance HFT
                                                                                • 129 Mean dangerous failure rate λD
                                                                                • 1210 Safe failure fraction SFF
                                                                                • 1211 Probability of dangerous failure PFHD
                                                                                • 1212 Mean time to dangerous failure MTTFd
                                                                                • 1213 Demand rate nop
                                                                                • 1214 Average probability of dangerous failure on demand PFDavg
                                                                                  • Feedback
                                                                                  • Contact
                                                                                      1. naechste_Seite 24
                                                                                      2. naechste Seite 18
                                                                                      3. naechste Seite 6
                                                                                      4. naechste Seite 16
                                                                                      5. naechste Seite 14
                                                                                      6. naechste Seite 25
                                                                                      7. naechste_Seite 11
                                                                                      8. naechste_Seite 17
                                                                                      9. fbArbeitspunkt_Min Ja
                                                                                      10. fbArbeitspunkt Ja
                                                                                      11. ftProgramm Standard-Programm
                                                                                      12. fz_kv
                                                                                      13. fz_pe 80
                                                                                      14. fz_pG 60
                                                                                      15. fzDelta_p_Soll 20
                                                                                      16. ftEinheit_Druck mbar
                                                                                      17. fatTyp [115]
                                                                                      18. fbArbeitspunkt_Min_2 Ja
                                                                                      19. fbArbeitspunkt_2 Ja
                                                                                      20. ftRegler_Typ VAG
                                                                                      21. ftProgramm_2 Standard-Programm
                                                                                      22. fz_kv_2
                                                                                      23. fatMedium [08]
                                                                                      24. fzDichte 08
                                                                                      25. ftEinheit_Dichte kgm3
                                                                                      26. fzV_Norm 30
                                                                                      27. ftEinheit_Volstrom m3h
                                                                                      28. fz_pe_2 80
                                                                                      29. fz_pG_2 60
                                                                                      30. fzDelta_p_Soll_2 20
                                                                                      31. ftEinheit_Druck2 [mbar]
                                                                                      32. ftEinheit_Geschw [ms]
                                                                                      33. fatTyp_2 [10954451150103322]
                                                                                      34. fbArbeitspunkt_Min_3 Ja
                                                                                      35. fbArbeitspunkt_3 Ja
                                                                                      36. ftProgramm_3 Standard-Programm
                                                                                      37. fz_kv_3
                                                                                      38. fz_pe_3 20
                                                                                      39. fz_pG_3 0
                                                                                      40. fzDelta_p_Soll_3 20
                                                                                      41. fatTyp_3 [123]
                                                                                      42. fatSchaltleistung [6363683]
                                                                                      43. fz_nop_Stunde 1
                                                                                      44. fz_nop_Jahr 8760
                                                                                      45. fzZyklus 3600
                                                                                      46. fzB10d 6363683
                                                                                      47. fzT10d 10
                                                                                      48. fzPFHd_1V 15714170551864384e-8
                                                                                      49. fzPFDavg_1V
                                                                                      50. ftGeeignet_1V PL d SIL 2
                                                                                      51. fzPFHd_2V 33505832253532625e-10
                                                                                      52. fzPFDavg_2V
                                                                                      53. ftGeeignet_2V PL e SIL 3
                                                                                      54. ftUebersicht Off
                                                                                      55. ftVerstaendlichkeit Off
                                                                                      56. ftFehlende_Info
                                                                                      57. ftUmfang Off
                                                                                      58. ftVerwendung_1 Off
                                                                                      59. ftVerwendung_2 Off
                                                                                      60. ftVerwendung_3 Off
                                                                                      61. ftVerwendung_4 Off
                                                                                      62. ftNavigation Off
                                                                                      63. ftTaetigkeitsbereich Off
                                                                                      64. ftBemerkung
                                                                                      65. Michael Rehkamp Elster Kromschroumlder>btnSenden
Page 44: VAD, VAG, VAV, VAH, VRH, VCD, VCG, VCV, VCH · PDF fileVAD, VAG, VAH, VAV, VRH, VCD, VCG, VCV, VCH · Edition 04.15 6 VAD VAD VAS 1 .1 Examples of application 1 .1 .1 Constant pressure

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 44

BA

C

pd-

8 11 Attachment blockFor locked installation of pressure gauge and other acces-soriesScope of delivery A 1 times attachment block B 2 times self-tapping screws for installation C 2 times O-rings

Accessories

8 10 Retaining frameIn the event that a pressure regulator VAx is installed at a later point upstream of a gas solenoid valve VAS a measur-ing orifice VMO or a fine-adjusting valve VMV the retaining frame must be fitted at the inlet of the second device in order to fasten the differential pressure orifice at the regulator outlet Order the retaining frame separatelyRetaining frame for Size 1 Order No 74923029 Size 2 Order No 74923030 Size 3 Order No 74923031

8 12 Gas control lineFine-adjusting valve VMV can be installed on the flow rate regulator VAH for fine adjustment of the gas flow rateThe gas control line for gas outlet pressure pd- is available with 2 18 compression fittingsSize 1 Order No 74924458 Size 2 Order No 74924459

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 45

8 13 Measuring orifice VMOThe measuring orifice VMO is designed to reduce the gas and air flow rates and is installed downstream of the valVario control The measuring orifice is available with Rp internal thread (NPT internal thread) or flange to ISO 7005See wwwdocuthekcom Elster Kromschroumlder Krom-schroumlder LBE Products 03 Valves and butterfly valves valVario accessories Type of document Technical Informa-tion VMO

Accessories

8 14 Filter module VMFUsing the filter module VMF the gas flow upstream of the gas solenoid valve VAS and the airgas ratio control is cleaned The filter module is available with Rp internal thread (NPT internal thread) or flange to ISO 7005 and can also be supplied with fitted pressure switch as an optionSee wwwdocuthekcom Elster Kromschroumlder Krom-schroumlder LBE Products 03 Valves and butterfly valves valVario accessories Type of document Technical Informa-tion VMF

8 15 Fine-adjusting valve VMVThe flow rate is set using the fine-adjusting valve VMV The fine-adjusting valve is available with Rp internal thread (NPT internal thread) or flange to ISO 7005See wwwdocuthekcom Elster Kromschroumlder Krom-schroumlder LBE Products 03 Valves and butterfly valves valVario accessories Type of document Technical Infor-mation VMV

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 46

9 Technical dataGas types natural gas LPG (gaseous) biologically produced methane (max 01 -by-vol H2S) or clean air other gases on request The gas must be clean and dry in all temperature conditions and must not contain condensateCE and FM approved UL listed max inlet pressure pu 10 ndash 500 mbar (4 ndash 200 WC) FM approved (230 V AC 120 V AC 24 V DC) non opera-tional pressure 700 mbar (10 psig)ANSICSA approved (230 V AC 120 V AC 24 V DC) up to 350 mbar (5 psig)Opening time of the solenoid valve quick opening le 05 s Closing time quick closing lt 1 sMedium and ambient temperatures -20 to +60degC (-4 to +140degF) no condensation permittedStorage temperature -20 to +40degC (-4 to +104degF)Enclosure IP 65Valve housing aluminium valve seal NBRConnection flanges with internal thread Rp to ISO 7-1 NPT to ANSIASMESafety valve Class A to EN 161 Factory Mutual Research Class 7400 Process Control Valves (230 V AC 120 V AC 24 V DC) ANSI Z2121 and CSA 65 ANSI Z2118 and CSA 63Control class A to EN 88-1Control range up to 101

Mains voltage 230 V AC +10-15 5060 Hz 200 V AC +10-15 5060 Hz 120 V AC +10-15 5060 Hz 100 V AC +10-15 5060 Hz 24 V DC plusmn20Duty cycle 100Power factor of the solenoid coil cos φ = 09Power consumption

Type Voltage Power

VAx 1

24 V DC 25 W ndash100 V AC 25 W (26 VA)120 V AC 25 W (26 VA)200 V AC 25 W (26 VA)230 V AC 25 W (26 VA)

VAx 2 VAx 3

24 V DC 36 W ndash100 V AC 36 W (40 VA)120 V AC 40 W (44 VA)200 V AC 40 W (44 VA)230 V AC 40 W (44 VA)

VBY24 V DC 8 W ndash

120 V AC 8 W ndash230 V AC 95 W ndash

Cable gland M20 times 15Electrical connection cable with max 25 mm2 (AWG 12) or plug with socket to EN 175301-803

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 47

Position indicator contact rating

Type Voltage Min current(resistive load)

Max current(resistive load)

VAxS VCxS 12 ndash 250 V AC 5060 Hz 100 mA 3 AVAxG VCxG 12 ndash 30 V DC 2 mA 01 A

Position indicator switching frequency max 5 times per minute

Switching current [A]

Switching cyclescos φ = 1 cos φ = 06

01 500000 50000005 300000 250000

1 200000 1000003 100000 ndash

Limited to max 200000 cycles for heating systems

9 1 VADOutlet pressure pd VAD-25 25 ndash 25 mbar (1 ndash 10 WC) VAD-50 20 ndash 50 mbar (8 ndash 20 WC) VAD-100 35 ndash 100 mbar (14 ndash 40 WC)Combustion chamber control pressure psc (connection psa)

-20 to +20 mbar (-78 to +78 WC)

VAD

pu

pd

(psa)

9 2 VAGOutlet pressure pd 05 ndash 100 mbar (02 ndash 40 WC)Air control pressure psa 05 ndash 100 mbar (02 ndash 40 WC)

Adjusting range at low fire plusmn5 mbar (plusmn2 WC)Transmission ratio of gas to air 11The inlet pressure must always be higher than the air control pressure psa + pressure loss ∆p + 5 mbar (2 WC)

VAGpd

pu

psa

psa

VAGK 1 x 18 coupling for plastic hose (internal dia 39 mm (015) external dia 61 mm (024)) or VAGE 1 x 18 compression fitting for 6 times 1 tube or VAGA 1 x NPT 18 adapter or VAGN zero governor with breathing orifice

9 3 VAH VRHAir control pressure psa 06 ndash 100 mbar (024 ndash 40 WC) Differential air pressure ∆psa (psa - psa-) 06 ndash 50 mbar (024 ndash 197 WC) Differential gas pressure ∆pd (pd - pd-) 06 ndash 50 mbar (024 ndash 197 WC)Transmission ratio of gas to air 11The inlet pressure must always be higher than the differen-tial air pressure ∆psa + pressure loss ∆p + max gas pres-sure on burner + 5 mbar (2 WC)Adjusting range at low fire plusmn5 mbar (plusmn2 WC)

Technical data

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 48

VAHVRH

pd-

pu

psa-

psa

Connection of the air control pressure psaVAHE VRHE 3 x 18 compression fitting for 6 times 1 tube or VAHA VRHA 3 x NPT 18 adapter

9 4 VAVOutlet pressure pd 05 ndash 30 mbar (02 ndash 117 WC)Air control pressure psa 04 ndash 30 mbar (015 ndash 117 WC)Combustion chamber control pressure psc

-20 to +20 mbar (-78 to +78 WC)Min control pressure differential psa - psc 04 mbar (015 WC)Min pressure differential pd - psc 05 mbar (02 WC)Adjusting range at low fire plusmn15 mbar (plusmn06 WC)Transmission ratio of gas to air 061 to 31The inlet pressure pu must always be higher than the air control pressure psa times transmission ratio V + pressure loss ∆p + 15 mbar (06 WC)

pu

pd psapsc

VAV

VAVK 2 x plastic hose couplings (internal dia 39 mm (015) external dia 61 mm (024)) or VAVE 2 x 18 compression fitting for 6 times 1 tube or VAVA 2 x NPT 18 adapter

Technical data

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 49

9 5 Safety-specific characteristic values for VAx 1 ndash 3For SILSuitable for Safety Integrity Level SIL 1 2 3

Diagnostic coverage DC 0

Type of subsystem Type A to EN 61508-2 74312

Operating mode High demand mode pursu-ant to EN 61508-4 3512

For PLSuitable for Performance Level PL a b c d e

Category B 1 2 3 4Common cause failure CCF gt 65Application of essential safety requirements Satisfied

Application of tried-and-tested safety requirements Satisfied

For SIL and PL

B10d value

Operating cyclesVAD VAG VAV VAH 1 10094360VAD VAG VAV VAH 2 8229021VAD VAG VAV VAH 3 6363683

Hardware fault tolerance (1 valve) HFT 0

Hardware fault tolerance (2 valves) HFT 1

Safe failure fraction SFF gt 90Fraction of undetected com-mon cause failures β ge 2

Max service life under operating conditions10 years after date of production plus max 12 year in stor-age prior to first use or once the given number of operating cycles has been reached depending on which is achieved firstThe devices are suitable for single-channel systems (HFT = 0) up to SIL 2PL d and up to SIL 3PL e when two re-dundant valves are installed in a double-channel architecture (HFT = 1) provided that the complete system complies with the requirements of EN 61508ISO 13849

For a glossary of terms see page 53 (Glossary)

Technical data

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 50

nop 1hnop 1a

sB10d

T10d aPFHD (1 VAx) 1h

PFHD (2 VAx) 1h

PFDavg (1 VAx)

PFDavg (2 VAx)

Technical data gt Safety-specific characteristic values for VAx 1 ndash 3

9 5 1 Determining the PFHD value the λD value and the MTTFd value

PFHD = λD = x nop= 1MTTFd

01B10d

PFDavg = x λD x 24 x 365 x T10d 12

Type

Cycle time

suitable for

suitable for

PFHD = Probability of dangerous failure (HDM = high de-mand mode) [1hour]PFDavg = Average probability of dangerous failure on de-mand (LDM = low demand mode)λD = Mean dangerous failure rate [1hour]MTTFd = Mean time to dangerous failure [hours]nop = Demand rate (mean number of annual operations) [1hour]

9 5 2 Calculating the PFHD and PFDavg

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 51

VAD VAG VAH VAV

H1

Rp frac14(NPT frac14)

H2

E

LF

F

H4

H3

B

VAxS VAxF

L2G

G

Technical data

9 6 Dimensions

Type

Connec-tion Dimensions

WeightRpNPT DN

L L2 E F G H1 H2 H3 H4 Bmm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch kg lbs

VAx 115 12 15 75 29 ndash ndash 75 29 15 06 ndash ndash 143 56 82 32 161 63 117 46 97 38 18 40VAH 115 12 15 75 29 ndash ndash 75 29 15 06 ndash ndash 143 56 100 39 161 63 135 53 97 38 2 44VAx 120 34 20 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 82 33 161 63 117 46 97 38 19 42VAH 120 34 20 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 100 39 161 63 135 53 97 38 21 46VAx 125 1 25 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 82 33 161 63 117 46 97 38 19 42VAH 125 1 25 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 100 39 161 63 135 53 97 38 21 46VAx 240 112 40 128 50 200 79 85 33 29 11 66 26 170 67 112 44 191 75 162 64 125 49 44 97VAH 240 112 40 128 50 200 79 85 33 29 11 66 26 170 67 132 52 191 75 182 72 125 49 47 104VAx 350 2 50 155 61 230 91 85 33 36 14 74 29 180 70 135 53 201 79 196 77 160 63 61 134VAH 350 2 50 155 61 230 91 85 33 36 14 74 29 180 70 156 61 201 79 217 85 160 63 64 141

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 52

10 Converting unitssee wwwadlatusorg

11 Maintenance cyclesAt least once per annum at least twice per annum for biologi-cally produced methaneIf the flow rate drops clean the strainer

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 53

12 Glossary12 1 Diagnostic coverage DCMeasure of the effectiveness of diagnostics which may be determined as the ratio between the failure rate of detected dangerous failures and the failure rate of total dangerous failuresNOTE Diagnostic coverage can exist for the whole or parts of a safety-related system For example diagnostic cover-age could exist for sensors andor logic system andor final elements Unit see EN ISO 13849-12008

12 2 Mode of operationHigh demand mode or continuous modeOperating mode where the frequency of demands for opera-tion made on a safety-related system is greater than one per year or greater than twice the proof-test frequencysee EN 61508-42008

12 3 CategoryClassification of the safety-related parts of a control system in respect of their resistance to faults and their subsequent behaviour in the fault condition and which is achieved by the structural arrangement of the parts fault detection andor by their reliability see EN ISO 13849-12008

12 4 Common cause failure CCFFailures of different items resulting from a single event where these failures are not consequences of each othersee EN ISO 13849-12008

12 5 Fraction of undetected common cause failures β Fraction of undetected failures of redundant components due to a single event whereby these failures are not based on mutual causesNOTE β is expressed as a fraction in the equations and as a percentage elsewheresee EN 61508-62010

12 6 B10d valueMean number of cycles until 10 of the components fail dan-gerouslysee EN ISO 13849-12008

12 7 T10d valueMean time until 10 of the components fail dangerouslysee EN ISO 13849-12008

12 8 Hardware fault tolerance HFTA hardware fault tolerance of N means that N + 1 is the mini-mum number of faults that could cause a loss of the safety functionsee IEC 61508-22010

12 9 Mean dangerous failure rate λD Mean rate of dangerous failures during operation time (T10d) Unit 1hsee EN ISO 13849-12008

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 54

12 10 Safe failure fraction SFFFraction of safe failures related to all failures which are as-sumed to appearsee EN 13611A22011

12 11 Probability of dangerous failure PFHD Value describing the likelihood of dangerous failure per hour of a component for high demand mode or continuous mode Unit 1hsee EN 13611A22011

12 12 Mean time to dangerous failure MTTFd Expectation of the mean time to dangerous failuresee EN ISO 13849-12008

12 13 Demand rate nop Mean number of annual operationssee EN ISO 13849-12008

12 14 Average probability of dangerous failure on demand PFDavg (LDM = 1 ndash 10 switching cyclesyear)Average probability of a dangerous failure of the safety function on demand (LDM = low demand mode)see EN 61508-6

Glossary

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415

Finally we are offering you the opportunity to assess this ldquoTechnical Information (TI)rdquo and to give us your opinion so that we can improve our documents further and suit them to your needs

ClarityFound information quicklySearched for a long timeDidnrsquot find informationWhat is missing

ComprehensionCoherentToo complicatedNo answer

ScopeToo littleSufficientToo wideNo answer

No answer

NavigationI can find my way aroundI got ldquolostrdquoNo answer

UseTo get to know the productTo choose a productPlanningTo look for information

My scope of functionsTechnical departmentSalesNo answer

Remarks

(Adobe Reader 7 or higher required) wwwadobecom

Elster GmbH Postfach 2809 middot 49018 Osnabruumlck Strotheweg 1 middot 49504 Lotte (Buumlren) GermanyT +49 541 1214-0 F +49 541 1214-370 infokromschroedercomwwwkromschroedercom

The current addresses of our international agents are available on the Internetwwwkromschroederdeindexphpid=718ampL=1

We reserve the right to make technical modifications in the interests of progressCopyright copy 2015 Elster GmbH All rights reserved

Contact

Feedback

0325

0530

  • Pressure regulators with solenoid valve VAD VAG VAV VAH
  • Flow rate regulator VRH
  • Pressure regulators with double solenoid valve VCD VCG VCV VCH
  • Contents
  • 1 Application
    • 11 Examples of application
      • 111 Constant pressure control
      • 112 Constant pressure control with two gas solenoid valves
      • 113 Constant pressure control with max pressure switch
      • 114 Constant pressure control with non-controlled pilot gas outlet
      • 115 Modulating control
      • 116 Modulating control with two gas solenoid valves
      • 117 Modulating control with two gas solenoid valves and inlet pressure switch
      • 118 HighLow control
      • 119 Zero pressure control
      • 1110 Staged flow rate control
      • 1111 Continuous or staged flow rate control
      • 1112 Modulating control with variable airgas ratio control with gas solenoid valve
      • 1113 Modulating control in residential heat generation
          • 2 Certification
          • 3 Function
            • 31 VAD VAG VAH VRH VAV
              • 311 Pressure regulator for gas VAD
              • 312 Airgas ratio control VAG
              • 313 Flow rate regulators VAH VRH
              • 314 Variable airgas ratio control VAV
              • 315 Pressure regulator with gas solenoid valve VAxS position indicator with visual indicator
                • 32 Animation
                • 33 Connection diagram
                  • 331 VAx with M20 cable gland
                  • 332 VAx with plug
                  • 333 VAS with VADVAGVAHVAV with M20 cable gland
                  • 334 VAS with VADVAGVAHVAV with plug
                      • 4 Replacement possibilities for MODULINE pressure regulators with gas solenoid valve
                        • 41 GVS GVI GVIB GVR and GVRH are to be replaced by VAD VAG VAG+VAS VAH and VAV
                          • 5 Flow rate
                            • 51 Selection example for VAD
                              • 511 Calculate VAD
                                • 52 Selection example for VAG VAH VRH VAV
                                  • 521 CalculateVAG VxHVAV
                                    • 53 Selection example for zero governor VAGN
                                      • 531 Calculate VAGN
                                          • 6 Selection
                                            • 61 Selection table for pressure regulator with solenoid valve VAD
                                            • 62 Type code for VAD
                                            • 63 Selection table for airgas ratio control with solenoid valve VAG flow rate regulators VAH VRH
                                            • 64 Type code for VAG VAH VRH
                                            • 65 Selection table for variable airgas ratio control with solenoid valve VAV
                                            • 66 Type code for VAV
                                            • 67 Accessories
                                              • 7 Project planning information
                                                • 71 Installation
                                                  • 711 Installation position
                                                    • 72 Setting the low-fire rate on VAG VAH VRH VAV
                                                    • 73 Setting the high-fire rate on VAV
                                                      • 731 Calculation
                                                          • 8 Accessories
                                                            • 81 Gas pressure switch DGVC for VAx VRH
                                                            • 82 Gas pressure switch DGVCT for VAxT VRHT
                                                            • 83 Bypass valvepilot gas valve VAS 1
                                                              • 831 VAS 1 attached to VADVAGVAHVAV 1
                                                              • 832 VAS 1 attached to VADVAGVAHVAV 2 VADVAGVAHVAV 3
                                                              • 833 Flow rate
                                                                • 84 Bypass valvepilot gas valve VBY 8 for VADVAGVAHVAV 1
                                                                  • 841 Scope of delivery VBY 8I as bypass valve
                                                                  • 842 Scope of delivery VBY 8R as pilot gas valve
                                                                  • 843 Selection
                                                                  • 844 Type code
                                                                  • 845 Flow rate
                                                                  • 846 Technical data
                                                                    • 85 Tightness control TC 116V
                                                                    • 86 Pressure test points
                                                                    • 87 Cable gland set
                                                                    • 88 Seal set VA 1thinspndashthinsp3
                                                                    • 89 Differential pressure orifice
                                                                    • 810 Retaining frame
                                                                    • 811 Attachment block
                                                                    • 812 Gas control line
                                                                    • 813 Measuring orifice VMO
                                                                    • 814 Filter module VMF
                                                                    • 815 Fine-adjusting valve VMV
                                                                      • 9 Technical data
                                                                        • 91 VAD
                                                                        • 92 VAG
                                                                        • 93 VAH VRH
                                                                        • 94 VAV
                                                                        • 95 Safety-specific characteristic values for VAx 1thinspndashthinsp3
                                                                          • 951 Determining the PFHD value the λD value and the MTTFd value
                                                                          • 952 Calculating the PFHD and PFDavg
                                                                            • 96 Dimensions
                                                                              • 10 Converting units
                                                                              • 11 Maintenance cycles
                                                                              • 12 Glossary
                                                                                • 121 Diagnostic coverage DC
                                                                                • 122 Mode of operation
                                                                                • 123 Category
                                                                                • 124 Common cause failure CCF
                                                                                • 125 Fraction of undetected common cause failures β
                                                                                • 126 B10d value
                                                                                • 127 T10d value
                                                                                • 128 Hardware fault tolerance HFT
                                                                                • 129 Mean dangerous failure rate λD
                                                                                • 1210 Safe failure fraction SFF
                                                                                • 1211 Probability of dangerous failure PFHD
                                                                                • 1212 Mean time to dangerous failure MTTFd
                                                                                • 1213 Demand rate nop
                                                                                • 1214 Average probability of dangerous failure on demand PFDavg
                                                                                  • Feedback
                                                                                  • Contact
                                                                                      1. naechste_Seite 24
                                                                                      2. naechste Seite 18
                                                                                      3. naechste Seite 6
                                                                                      4. naechste Seite 16
                                                                                      5. naechste Seite 14
                                                                                      6. naechste Seite 25
                                                                                      7. naechste_Seite 11
                                                                                      8. naechste_Seite 17
                                                                                      9. fbArbeitspunkt_Min Ja
                                                                                      10. fbArbeitspunkt Ja
                                                                                      11. ftProgramm Standard-Programm
                                                                                      12. fz_kv
                                                                                      13. fz_pe 80
                                                                                      14. fz_pG 60
                                                                                      15. fzDelta_p_Soll 20
                                                                                      16. ftEinheit_Druck mbar
                                                                                      17. fatTyp [115]
                                                                                      18. fbArbeitspunkt_Min_2 Ja
                                                                                      19. fbArbeitspunkt_2 Ja
                                                                                      20. ftRegler_Typ VAG
                                                                                      21. ftProgramm_2 Standard-Programm
                                                                                      22. fz_kv_2
                                                                                      23. fatMedium [08]
                                                                                      24. fzDichte 08
                                                                                      25. ftEinheit_Dichte kgm3
                                                                                      26. fzV_Norm 30
                                                                                      27. ftEinheit_Volstrom m3h
                                                                                      28. fz_pe_2 80
                                                                                      29. fz_pG_2 60
                                                                                      30. fzDelta_p_Soll_2 20
                                                                                      31. ftEinheit_Druck2 [mbar]
                                                                                      32. ftEinheit_Geschw [ms]
                                                                                      33. fatTyp_2 [10954451150103322]
                                                                                      34. fbArbeitspunkt_Min_3 Ja
                                                                                      35. fbArbeitspunkt_3 Ja
                                                                                      36. ftProgramm_3 Standard-Programm
                                                                                      37. fz_kv_3
                                                                                      38. fz_pe_3 20
                                                                                      39. fz_pG_3 0
                                                                                      40. fzDelta_p_Soll_3 20
                                                                                      41. fatTyp_3 [123]
                                                                                      42. fatSchaltleistung [6363683]
                                                                                      43. fz_nop_Stunde 1
                                                                                      44. fz_nop_Jahr 8760
                                                                                      45. fzZyklus 3600
                                                                                      46. fzB10d 6363683
                                                                                      47. fzT10d 10
                                                                                      48. fzPFHd_1V 15714170551864384e-8
                                                                                      49. fzPFDavg_1V
                                                                                      50. ftGeeignet_1V PL d SIL 2
                                                                                      51. fzPFHd_2V 33505832253532625e-10
                                                                                      52. fzPFDavg_2V
                                                                                      53. ftGeeignet_2V PL e SIL 3
                                                                                      54. ftUebersicht Off
                                                                                      55. ftVerstaendlichkeit Off
                                                                                      56. ftFehlende_Info
                                                                                      57. ftUmfang Off
                                                                                      58. ftVerwendung_1 Off
                                                                                      59. ftVerwendung_2 Off
                                                                                      60. ftVerwendung_3 Off
                                                                                      61. ftVerwendung_4 Off
                                                                                      62. ftNavigation Off
                                                                                      63. ftTaetigkeitsbereich Off
                                                                                      64. ftBemerkung
                                                                                      65. Michael Rehkamp Elster Kromschroumlder>btnSenden
Page 45: VAD, VAG, VAV, VAH, VRH, VCD, VCG, VCV, VCH · PDF fileVAD, VAG, VAH, VAV, VRH, VCD, VCG, VCV, VCH · Edition 04.15 6 VAD VAD VAS 1 .1 Examples of application 1 .1 .1 Constant pressure

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 45

8 13 Measuring orifice VMOThe measuring orifice VMO is designed to reduce the gas and air flow rates and is installed downstream of the valVario control The measuring orifice is available with Rp internal thread (NPT internal thread) or flange to ISO 7005See wwwdocuthekcom Elster Kromschroumlder Krom-schroumlder LBE Products 03 Valves and butterfly valves valVario accessories Type of document Technical Informa-tion VMO

Accessories

8 14 Filter module VMFUsing the filter module VMF the gas flow upstream of the gas solenoid valve VAS and the airgas ratio control is cleaned The filter module is available with Rp internal thread (NPT internal thread) or flange to ISO 7005 and can also be supplied with fitted pressure switch as an optionSee wwwdocuthekcom Elster Kromschroumlder Krom-schroumlder LBE Products 03 Valves and butterfly valves valVario accessories Type of document Technical Informa-tion VMF

8 15 Fine-adjusting valve VMVThe flow rate is set using the fine-adjusting valve VMV The fine-adjusting valve is available with Rp internal thread (NPT internal thread) or flange to ISO 7005See wwwdocuthekcom Elster Kromschroumlder Krom-schroumlder LBE Products 03 Valves and butterfly valves valVario accessories Type of document Technical Infor-mation VMV

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 46

9 Technical dataGas types natural gas LPG (gaseous) biologically produced methane (max 01 -by-vol H2S) or clean air other gases on request The gas must be clean and dry in all temperature conditions and must not contain condensateCE and FM approved UL listed max inlet pressure pu 10 ndash 500 mbar (4 ndash 200 WC) FM approved (230 V AC 120 V AC 24 V DC) non opera-tional pressure 700 mbar (10 psig)ANSICSA approved (230 V AC 120 V AC 24 V DC) up to 350 mbar (5 psig)Opening time of the solenoid valve quick opening le 05 s Closing time quick closing lt 1 sMedium and ambient temperatures -20 to +60degC (-4 to +140degF) no condensation permittedStorage temperature -20 to +40degC (-4 to +104degF)Enclosure IP 65Valve housing aluminium valve seal NBRConnection flanges with internal thread Rp to ISO 7-1 NPT to ANSIASMESafety valve Class A to EN 161 Factory Mutual Research Class 7400 Process Control Valves (230 V AC 120 V AC 24 V DC) ANSI Z2121 and CSA 65 ANSI Z2118 and CSA 63Control class A to EN 88-1Control range up to 101

Mains voltage 230 V AC +10-15 5060 Hz 200 V AC +10-15 5060 Hz 120 V AC +10-15 5060 Hz 100 V AC +10-15 5060 Hz 24 V DC plusmn20Duty cycle 100Power factor of the solenoid coil cos φ = 09Power consumption

Type Voltage Power

VAx 1

24 V DC 25 W ndash100 V AC 25 W (26 VA)120 V AC 25 W (26 VA)200 V AC 25 W (26 VA)230 V AC 25 W (26 VA)

VAx 2 VAx 3

24 V DC 36 W ndash100 V AC 36 W (40 VA)120 V AC 40 W (44 VA)200 V AC 40 W (44 VA)230 V AC 40 W (44 VA)

VBY24 V DC 8 W ndash

120 V AC 8 W ndash230 V AC 95 W ndash

Cable gland M20 times 15Electrical connection cable with max 25 mm2 (AWG 12) or plug with socket to EN 175301-803

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 47

Position indicator contact rating

Type Voltage Min current(resistive load)

Max current(resistive load)

VAxS VCxS 12 ndash 250 V AC 5060 Hz 100 mA 3 AVAxG VCxG 12 ndash 30 V DC 2 mA 01 A

Position indicator switching frequency max 5 times per minute

Switching current [A]

Switching cyclescos φ = 1 cos φ = 06

01 500000 50000005 300000 250000

1 200000 1000003 100000 ndash

Limited to max 200000 cycles for heating systems

9 1 VADOutlet pressure pd VAD-25 25 ndash 25 mbar (1 ndash 10 WC) VAD-50 20 ndash 50 mbar (8 ndash 20 WC) VAD-100 35 ndash 100 mbar (14 ndash 40 WC)Combustion chamber control pressure psc (connection psa)

-20 to +20 mbar (-78 to +78 WC)

VAD

pu

pd

(psa)

9 2 VAGOutlet pressure pd 05 ndash 100 mbar (02 ndash 40 WC)Air control pressure psa 05 ndash 100 mbar (02 ndash 40 WC)

Adjusting range at low fire plusmn5 mbar (plusmn2 WC)Transmission ratio of gas to air 11The inlet pressure must always be higher than the air control pressure psa + pressure loss ∆p + 5 mbar (2 WC)

VAGpd

pu

psa

psa

VAGK 1 x 18 coupling for plastic hose (internal dia 39 mm (015) external dia 61 mm (024)) or VAGE 1 x 18 compression fitting for 6 times 1 tube or VAGA 1 x NPT 18 adapter or VAGN zero governor with breathing orifice

9 3 VAH VRHAir control pressure psa 06 ndash 100 mbar (024 ndash 40 WC) Differential air pressure ∆psa (psa - psa-) 06 ndash 50 mbar (024 ndash 197 WC) Differential gas pressure ∆pd (pd - pd-) 06 ndash 50 mbar (024 ndash 197 WC)Transmission ratio of gas to air 11The inlet pressure must always be higher than the differen-tial air pressure ∆psa + pressure loss ∆p + max gas pres-sure on burner + 5 mbar (2 WC)Adjusting range at low fire plusmn5 mbar (plusmn2 WC)

Technical data

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 48

VAHVRH

pd-

pu

psa-

psa

Connection of the air control pressure psaVAHE VRHE 3 x 18 compression fitting for 6 times 1 tube or VAHA VRHA 3 x NPT 18 adapter

9 4 VAVOutlet pressure pd 05 ndash 30 mbar (02 ndash 117 WC)Air control pressure psa 04 ndash 30 mbar (015 ndash 117 WC)Combustion chamber control pressure psc

-20 to +20 mbar (-78 to +78 WC)Min control pressure differential psa - psc 04 mbar (015 WC)Min pressure differential pd - psc 05 mbar (02 WC)Adjusting range at low fire plusmn15 mbar (plusmn06 WC)Transmission ratio of gas to air 061 to 31The inlet pressure pu must always be higher than the air control pressure psa times transmission ratio V + pressure loss ∆p + 15 mbar (06 WC)

pu

pd psapsc

VAV

VAVK 2 x plastic hose couplings (internal dia 39 mm (015) external dia 61 mm (024)) or VAVE 2 x 18 compression fitting for 6 times 1 tube or VAVA 2 x NPT 18 adapter

Technical data

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 49

9 5 Safety-specific characteristic values for VAx 1 ndash 3For SILSuitable for Safety Integrity Level SIL 1 2 3

Diagnostic coverage DC 0

Type of subsystem Type A to EN 61508-2 74312

Operating mode High demand mode pursu-ant to EN 61508-4 3512

For PLSuitable for Performance Level PL a b c d e

Category B 1 2 3 4Common cause failure CCF gt 65Application of essential safety requirements Satisfied

Application of tried-and-tested safety requirements Satisfied

For SIL and PL

B10d value

Operating cyclesVAD VAG VAV VAH 1 10094360VAD VAG VAV VAH 2 8229021VAD VAG VAV VAH 3 6363683

Hardware fault tolerance (1 valve) HFT 0

Hardware fault tolerance (2 valves) HFT 1

Safe failure fraction SFF gt 90Fraction of undetected com-mon cause failures β ge 2

Max service life under operating conditions10 years after date of production plus max 12 year in stor-age prior to first use or once the given number of operating cycles has been reached depending on which is achieved firstThe devices are suitable for single-channel systems (HFT = 0) up to SIL 2PL d and up to SIL 3PL e when two re-dundant valves are installed in a double-channel architecture (HFT = 1) provided that the complete system complies with the requirements of EN 61508ISO 13849

For a glossary of terms see page 53 (Glossary)

Technical data

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 50

nop 1hnop 1a

sB10d

T10d aPFHD (1 VAx) 1h

PFHD (2 VAx) 1h

PFDavg (1 VAx)

PFDavg (2 VAx)

Technical data gt Safety-specific characteristic values for VAx 1 ndash 3

9 5 1 Determining the PFHD value the λD value and the MTTFd value

PFHD = λD = x nop= 1MTTFd

01B10d

PFDavg = x λD x 24 x 365 x T10d 12

Type

Cycle time

suitable for

suitable for

PFHD = Probability of dangerous failure (HDM = high de-mand mode) [1hour]PFDavg = Average probability of dangerous failure on de-mand (LDM = low demand mode)λD = Mean dangerous failure rate [1hour]MTTFd = Mean time to dangerous failure [hours]nop = Demand rate (mean number of annual operations) [1hour]

9 5 2 Calculating the PFHD and PFDavg

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 51

VAD VAG VAH VAV

H1

Rp frac14(NPT frac14)

H2

E

LF

F

H4

H3

B

VAxS VAxF

L2G

G

Technical data

9 6 Dimensions

Type

Connec-tion Dimensions

WeightRpNPT DN

L L2 E F G H1 H2 H3 H4 Bmm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch kg lbs

VAx 115 12 15 75 29 ndash ndash 75 29 15 06 ndash ndash 143 56 82 32 161 63 117 46 97 38 18 40VAH 115 12 15 75 29 ndash ndash 75 29 15 06 ndash ndash 143 56 100 39 161 63 135 53 97 38 2 44VAx 120 34 20 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 82 33 161 63 117 46 97 38 19 42VAH 120 34 20 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 100 39 161 63 135 53 97 38 21 46VAx 125 1 25 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 82 33 161 63 117 46 97 38 19 42VAH 125 1 25 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 100 39 161 63 135 53 97 38 21 46VAx 240 112 40 128 50 200 79 85 33 29 11 66 26 170 67 112 44 191 75 162 64 125 49 44 97VAH 240 112 40 128 50 200 79 85 33 29 11 66 26 170 67 132 52 191 75 182 72 125 49 47 104VAx 350 2 50 155 61 230 91 85 33 36 14 74 29 180 70 135 53 201 79 196 77 160 63 61 134VAH 350 2 50 155 61 230 91 85 33 36 14 74 29 180 70 156 61 201 79 217 85 160 63 64 141

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 52

10 Converting unitssee wwwadlatusorg

11 Maintenance cyclesAt least once per annum at least twice per annum for biologi-cally produced methaneIf the flow rate drops clean the strainer

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 53

12 Glossary12 1 Diagnostic coverage DCMeasure of the effectiveness of diagnostics which may be determined as the ratio between the failure rate of detected dangerous failures and the failure rate of total dangerous failuresNOTE Diagnostic coverage can exist for the whole or parts of a safety-related system For example diagnostic cover-age could exist for sensors andor logic system andor final elements Unit see EN ISO 13849-12008

12 2 Mode of operationHigh demand mode or continuous modeOperating mode where the frequency of demands for opera-tion made on a safety-related system is greater than one per year or greater than twice the proof-test frequencysee EN 61508-42008

12 3 CategoryClassification of the safety-related parts of a control system in respect of their resistance to faults and their subsequent behaviour in the fault condition and which is achieved by the structural arrangement of the parts fault detection andor by their reliability see EN ISO 13849-12008

12 4 Common cause failure CCFFailures of different items resulting from a single event where these failures are not consequences of each othersee EN ISO 13849-12008

12 5 Fraction of undetected common cause failures β Fraction of undetected failures of redundant components due to a single event whereby these failures are not based on mutual causesNOTE β is expressed as a fraction in the equations and as a percentage elsewheresee EN 61508-62010

12 6 B10d valueMean number of cycles until 10 of the components fail dan-gerouslysee EN ISO 13849-12008

12 7 T10d valueMean time until 10 of the components fail dangerouslysee EN ISO 13849-12008

12 8 Hardware fault tolerance HFTA hardware fault tolerance of N means that N + 1 is the mini-mum number of faults that could cause a loss of the safety functionsee IEC 61508-22010

12 9 Mean dangerous failure rate λD Mean rate of dangerous failures during operation time (T10d) Unit 1hsee EN ISO 13849-12008

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 54

12 10 Safe failure fraction SFFFraction of safe failures related to all failures which are as-sumed to appearsee EN 13611A22011

12 11 Probability of dangerous failure PFHD Value describing the likelihood of dangerous failure per hour of a component for high demand mode or continuous mode Unit 1hsee EN 13611A22011

12 12 Mean time to dangerous failure MTTFd Expectation of the mean time to dangerous failuresee EN ISO 13849-12008

12 13 Demand rate nop Mean number of annual operationssee EN ISO 13849-12008

12 14 Average probability of dangerous failure on demand PFDavg (LDM = 1 ndash 10 switching cyclesyear)Average probability of a dangerous failure of the safety function on demand (LDM = low demand mode)see EN 61508-6

Glossary

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415

Finally we are offering you the opportunity to assess this ldquoTechnical Information (TI)rdquo and to give us your opinion so that we can improve our documents further and suit them to your needs

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ComprehensionCoherentToo complicatedNo answer

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UseTo get to know the productTo choose a productPlanningTo look for information

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Remarks

(Adobe Reader 7 or higher required) wwwadobecom

Elster GmbH Postfach 2809 middot 49018 Osnabruumlck Strotheweg 1 middot 49504 Lotte (Buumlren) GermanyT +49 541 1214-0 F +49 541 1214-370 infokromschroedercomwwwkromschroedercom

The current addresses of our international agents are available on the Internetwwwkromschroederdeindexphpid=718ampL=1

We reserve the right to make technical modifications in the interests of progressCopyright copy 2015 Elster GmbH All rights reserved

Contact

Feedback

0325

0530

  • Pressure regulators with solenoid valve VAD VAG VAV VAH
  • Flow rate regulator VRH
  • Pressure regulators with double solenoid valve VCD VCG VCV VCH
  • Contents
  • 1 Application
    • 11 Examples of application
      • 111 Constant pressure control
      • 112 Constant pressure control with two gas solenoid valves
      • 113 Constant pressure control with max pressure switch
      • 114 Constant pressure control with non-controlled pilot gas outlet
      • 115 Modulating control
      • 116 Modulating control with two gas solenoid valves
      • 117 Modulating control with two gas solenoid valves and inlet pressure switch
      • 118 HighLow control
      • 119 Zero pressure control
      • 1110 Staged flow rate control
      • 1111 Continuous or staged flow rate control
      • 1112 Modulating control with variable airgas ratio control with gas solenoid valve
      • 1113 Modulating control in residential heat generation
          • 2 Certification
          • 3 Function
            • 31 VAD VAG VAH VRH VAV
              • 311 Pressure regulator for gas VAD
              • 312 Airgas ratio control VAG
              • 313 Flow rate regulators VAH VRH
              • 314 Variable airgas ratio control VAV
              • 315 Pressure regulator with gas solenoid valve VAxS position indicator with visual indicator
                • 32 Animation
                • 33 Connection diagram
                  • 331 VAx with M20 cable gland
                  • 332 VAx with plug
                  • 333 VAS with VADVAGVAHVAV with M20 cable gland
                  • 334 VAS with VADVAGVAHVAV with plug
                      • 4 Replacement possibilities for MODULINE pressure regulators with gas solenoid valve
                        • 41 GVS GVI GVIB GVR and GVRH are to be replaced by VAD VAG VAG+VAS VAH and VAV
                          • 5 Flow rate
                            • 51 Selection example for VAD
                              • 511 Calculate VAD
                                • 52 Selection example for VAG VAH VRH VAV
                                  • 521 CalculateVAG VxHVAV
                                    • 53 Selection example for zero governor VAGN
                                      • 531 Calculate VAGN
                                          • 6 Selection
                                            • 61 Selection table for pressure regulator with solenoid valve VAD
                                            • 62 Type code for VAD
                                            • 63 Selection table for airgas ratio control with solenoid valve VAG flow rate regulators VAH VRH
                                            • 64 Type code for VAG VAH VRH
                                            • 65 Selection table for variable airgas ratio control with solenoid valve VAV
                                            • 66 Type code for VAV
                                            • 67 Accessories
                                              • 7 Project planning information
                                                • 71 Installation
                                                  • 711 Installation position
                                                    • 72 Setting the low-fire rate on VAG VAH VRH VAV
                                                    • 73 Setting the high-fire rate on VAV
                                                      • 731 Calculation
                                                          • 8 Accessories
                                                            • 81 Gas pressure switch DGVC for VAx VRH
                                                            • 82 Gas pressure switch DGVCT for VAxT VRHT
                                                            • 83 Bypass valvepilot gas valve VAS 1
                                                              • 831 VAS 1 attached to VADVAGVAHVAV 1
                                                              • 832 VAS 1 attached to VADVAGVAHVAV 2 VADVAGVAHVAV 3
                                                              • 833 Flow rate
                                                                • 84 Bypass valvepilot gas valve VBY 8 for VADVAGVAHVAV 1
                                                                  • 841 Scope of delivery VBY 8I as bypass valve
                                                                  • 842 Scope of delivery VBY 8R as pilot gas valve
                                                                  • 843 Selection
                                                                  • 844 Type code
                                                                  • 845 Flow rate
                                                                  • 846 Technical data
                                                                    • 85 Tightness control TC 116V
                                                                    • 86 Pressure test points
                                                                    • 87 Cable gland set
                                                                    • 88 Seal set VA 1thinspndashthinsp3
                                                                    • 89 Differential pressure orifice
                                                                    • 810 Retaining frame
                                                                    • 811 Attachment block
                                                                    • 812 Gas control line
                                                                    • 813 Measuring orifice VMO
                                                                    • 814 Filter module VMF
                                                                    • 815 Fine-adjusting valve VMV
                                                                      • 9 Technical data
                                                                        • 91 VAD
                                                                        • 92 VAG
                                                                        • 93 VAH VRH
                                                                        • 94 VAV
                                                                        • 95 Safety-specific characteristic values for VAx 1thinspndashthinsp3
                                                                          • 951 Determining the PFHD value the λD value and the MTTFd value
                                                                          • 952 Calculating the PFHD and PFDavg
                                                                            • 96 Dimensions
                                                                              • 10 Converting units
                                                                              • 11 Maintenance cycles
                                                                              • 12 Glossary
                                                                                • 121 Diagnostic coverage DC
                                                                                • 122 Mode of operation
                                                                                • 123 Category
                                                                                • 124 Common cause failure CCF
                                                                                • 125 Fraction of undetected common cause failures β
                                                                                • 126 B10d value
                                                                                • 127 T10d value
                                                                                • 128 Hardware fault tolerance HFT
                                                                                • 129 Mean dangerous failure rate λD
                                                                                • 1210 Safe failure fraction SFF
                                                                                • 1211 Probability of dangerous failure PFHD
                                                                                • 1212 Mean time to dangerous failure MTTFd
                                                                                • 1213 Demand rate nop
                                                                                • 1214 Average probability of dangerous failure on demand PFDavg
                                                                                  • Feedback
                                                                                  • Contact
                                                                                      1. naechste_Seite 24
                                                                                      2. naechste Seite 18
                                                                                      3. naechste Seite 6
                                                                                      4. naechste Seite 16
                                                                                      5. naechste Seite 14
                                                                                      6. naechste Seite 25
                                                                                      7. naechste_Seite 11
                                                                                      8. naechste_Seite 17
                                                                                      9. fbArbeitspunkt_Min Ja
                                                                                      10. fbArbeitspunkt Ja
                                                                                      11. ftProgramm Standard-Programm
                                                                                      12. fz_kv
                                                                                      13. fz_pe 80
                                                                                      14. fz_pG 60
                                                                                      15. fzDelta_p_Soll 20
                                                                                      16. ftEinheit_Druck mbar
                                                                                      17. fatTyp [115]
                                                                                      18. fbArbeitspunkt_Min_2 Ja
                                                                                      19. fbArbeitspunkt_2 Ja
                                                                                      20. ftRegler_Typ VAG
                                                                                      21. ftProgramm_2 Standard-Programm
                                                                                      22. fz_kv_2
                                                                                      23. fatMedium [08]
                                                                                      24. fzDichte 08
                                                                                      25. ftEinheit_Dichte kgm3
                                                                                      26. fzV_Norm 30
                                                                                      27. ftEinheit_Volstrom m3h
                                                                                      28. fz_pe_2 80
                                                                                      29. fz_pG_2 60
                                                                                      30. fzDelta_p_Soll_2 20
                                                                                      31. ftEinheit_Druck2 [mbar]
                                                                                      32. ftEinheit_Geschw [ms]
                                                                                      33. fatTyp_2 [10954451150103322]
                                                                                      34. fbArbeitspunkt_Min_3 Ja
                                                                                      35. fbArbeitspunkt_3 Ja
                                                                                      36. ftProgramm_3 Standard-Programm
                                                                                      37. fz_kv_3
                                                                                      38. fz_pe_3 20
                                                                                      39. fz_pG_3 0
                                                                                      40. fzDelta_p_Soll_3 20
                                                                                      41. fatTyp_3 [123]
                                                                                      42. fatSchaltleistung [6363683]
                                                                                      43. fz_nop_Stunde 1
                                                                                      44. fz_nop_Jahr 8760
                                                                                      45. fzZyklus 3600
                                                                                      46. fzB10d 6363683
                                                                                      47. fzT10d 10
                                                                                      48. fzPFHd_1V 15714170551864384e-8
                                                                                      49. fzPFDavg_1V
                                                                                      50. ftGeeignet_1V PL d SIL 2
                                                                                      51. fzPFHd_2V 33505832253532625e-10
                                                                                      52. fzPFDavg_2V
                                                                                      53. ftGeeignet_2V PL e SIL 3
                                                                                      54. ftUebersicht Off
                                                                                      55. ftVerstaendlichkeit Off
                                                                                      56. ftFehlende_Info
                                                                                      57. ftUmfang Off
                                                                                      58. ftVerwendung_1 Off
                                                                                      59. ftVerwendung_2 Off
                                                                                      60. ftVerwendung_3 Off
                                                                                      61. ftVerwendung_4 Off
                                                                                      62. ftNavigation Off
                                                                                      63. ftTaetigkeitsbereich Off
                                                                                      64. ftBemerkung
                                                                                      65. Michael Rehkamp Elster Kromschroumlder>btnSenden
Page 46: VAD, VAG, VAV, VAH, VRH, VCD, VCG, VCV, VCH · PDF fileVAD, VAG, VAH, VAV, VRH, VCD, VCG, VCV, VCH · Edition 04.15 6 VAD VAD VAS 1 .1 Examples of application 1 .1 .1 Constant pressure

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 46

9 Technical dataGas types natural gas LPG (gaseous) biologically produced methane (max 01 -by-vol H2S) or clean air other gases on request The gas must be clean and dry in all temperature conditions and must not contain condensateCE and FM approved UL listed max inlet pressure pu 10 ndash 500 mbar (4 ndash 200 WC) FM approved (230 V AC 120 V AC 24 V DC) non opera-tional pressure 700 mbar (10 psig)ANSICSA approved (230 V AC 120 V AC 24 V DC) up to 350 mbar (5 psig)Opening time of the solenoid valve quick opening le 05 s Closing time quick closing lt 1 sMedium and ambient temperatures -20 to +60degC (-4 to +140degF) no condensation permittedStorage temperature -20 to +40degC (-4 to +104degF)Enclosure IP 65Valve housing aluminium valve seal NBRConnection flanges with internal thread Rp to ISO 7-1 NPT to ANSIASMESafety valve Class A to EN 161 Factory Mutual Research Class 7400 Process Control Valves (230 V AC 120 V AC 24 V DC) ANSI Z2121 and CSA 65 ANSI Z2118 and CSA 63Control class A to EN 88-1Control range up to 101

Mains voltage 230 V AC +10-15 5060 Hz 200 V AC +10-15 5060 Hz 120 V AC +10-15 5060 Hz 100 V AC +10-15 5060 Hz 24 V DC plusmn20Duty cycle 100Power factor of the solenoid coil cos φ = 09Power consumption

Type Voltage Power

VAx 1

24 V DC 25 W ndash100 V AC 25 W (26 VA)120 V AC 25 W (26 VA)200 V AC 25 W (26 VA)230 V AC 25 W (26 VA)

VAx 2 VAx 3

24 V DC 36 W ndash100 V AC 36 W (40 VA)120 V AC 40 W (44 VA)200 V AC 40 W (44 VA)230 V AC 40 W (44 VA)

VBY24 V DC 8 W ndash

120 V AC 8 W ndash230 V AC 95 W ndash

Cable gland M20 times 15Electrical connection cable with max 25 mm2 (AWG 12) or plug with socket to EN 175301-803

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 47

Position indicator contact rating

Type Voltage Min current(resistive load)

Max current(resistive load)

VAxS VCxS 12 ndash 250 V AC 5060 Hz 100 mA 3 AVAxG VCxG 12 ndash 30 V DC 2 mA 01 A

Position indicator switching frequency max 5 times per minute

Switching current [A]

Switching cyclescos φ = 1 cos φ = 06

01 500000 50000005 300000 250000

1 200000 1000003 100000 ndash

Limited to max 200000 cycles for heating systems

9 1 VADOutlet pressure pd VAD-25 25 ndash 25 mbar (1 ndash 10 WC) VAD-50 20 ndash 50 mbar (8 ndash 20 WC) VAD-100 35 ndash 100 mbar (14 ndash 40 WC)Combustion chamber control pressure psc (connection psa)

-20 to +20 mbar (-78 to +78 WC)

VAD

pu

pd

(psa)

9 2 VAGOutlet pressure pd 05 ndash 100 mbar (02 ndash 40 WC)Air control pressure psa 05 ndash 100 mbar (02 ndash 40 WC)

Adjusting range at low fire plusmn5 mbar (plusmn2 WC)Transmission ratio of gas to air 11The inlet pressure must always be higher than the air control pressure psa + pressure loss ∆p + 5 mbar (2 WC)

VAGpd

pu

psa

psa

VAGK 1 x 18 coupling for plastic hose (internal dia 39 mm (015) external dia 61 mm (024)) or VAGE 1 x 18 compression fitting for 6 times 1 tube or VAGA 1 x NPT 18 adapter or VAGN zero governor with breathing orifice

9 3 VAH VRHAir control pressure psa 06 ndash 100 mbar (024 ndash 40 WC) Differential air pressure ∆psa (psa - psa-) 06 ndash 50 mbar (024 ndash 197 WC) Differential gas pressure ∆pd (pd - pd-) 06 ndash 50 mbar (024 ndash 197 WC)Transmission ratio of gas to air 11The inlet pressure must always be higher than the differen-tial air pressure ∆psa + pressure loss ∆p + max gas pres-sure on burner + 5 mbar (2 WC)Adjusting range at low fire plusmn5 mbar (plusmn2 WC)

Technical data

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 48

VAHVRH

pd-

pu

psa-

psa

Connection of the air control pressure psaVAHE VRHE 3 x 18 compression fitting for 6 times 1 tube or VAHA VRHA 3 x NPT 18 adapter

9 4 VAVOutlet pressure pd 05 ndash 30 mbar (02 ndash 117 WC)Air control pressure psa 04 ndash 30 mbar (015 ndash 117 WC)Combustion chamber control pressure psc

-20 to +20 mbar (-78 to +78 WC)Min control pressure differential psa - psc 04 mbar (015 WC)Min pressure differential pd - psc 05 mbar (02 WC)Adjusting range at low fire plusmn15 mbar (plusmn06 WC)Transmission ratio of gas to air 061 to 31The inlet pressure pu must always be higher than the air control pressure psa times transmission ratio V + pressure loss ∆p + 15 mbar (06 WC)

pu

pd psapsc

VAV

VAVK 2 x plastic hose couplings (internal dia 39 mm (015) external dia 61 mm (024)) or VAVE 2 x 18 compression fitting for 6 times 1 tube or VAVA 2 x NPT 18 adapter

Technical data

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 49

9 5 Safety-specific characteristic values for VAx 1 ndash 3For SILSuitable for Safety Integrity Level SIL 1 2 3

Diagnostic coverage DC 0

Type of subsystem Type A to EN 61508-2 74312

Operating mode High demand mode pursu-ant to EN 61508-4 3512

For PLSuitable for Performance Level PL a b c d e

Category B 1 2 3 4Common cause failure CCF gt 65Application of essential safety requirements Satisfied

Application of tried-and-tested safety requirements Satisfied

For SIL and PL

B10d value

Operating cyclesVAD VAG VAV VAH 1 10094360VAD VAG VAV VAH 2 8229021VAD VAG VAV VAH 3 6363683

Hardware fault tolerance (1 valve) HFT 0

Hardware fault tolerance (2 valves) HFT 1

Safe failure fraction SFF gt 90Fraction of undetected com-mon cause failures β ge 2

Max service life under operating conditions10 years after date of production plus max 12 year in stor-age prior to first use or once the given number of operating cycles has been reached depending on which is achieved firstThe devices are suitable for single-channel systems (HFT = 0) up to SIL 2PL d and up to SIL 3PL e when two re-dundant valves are installed in a double-channel architecture (HFT = 1) provided that the complete system complies with the requirements of EN 61508ISO 13849

For a glossary of terms see page 53 (Glossary)

Technical data

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 50

nop 1hnop 1a

sB10d

T10d aPFHD (1 VAx) 1h

PFHD (2 VAx) 1h

PFDavg (1 VAx)

PFDavg (2 VAx)

Technical data gt Safety-specific characteristic values for VAx 1 ndash 3

9 5 1 Determining the PFHD value the λD value and the MTTFd value

PFHD = λD = x nop= 1MTTFd

01B10d

PFDavg = x λD x 24 x 365 x T10d 12

Type

Cycle time

suitable for

suitable for

PFHD = Probability of dangerous failure (HDM = high de-mand mode) [1hour]PFDavg = Average probability of dangerous failure on de-mand (LDM = low demand mode)λD = Mean dangerous failure rate [1hour]MTTFd = Mean time to dangerous failure [hours]nop = Demand rate (mean number of annual operations) [1hour]

9 5 2 Calculating the PFHD and PFDavg

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 51

VAD VAG VAH VAV

H1

Rp frac14(NPT frac14)

H2

E

LF

F

H4

H3

B

VAxS VAxF

L2G

G

Technical data

9 6 Dimensions

Type

Connec-tion Dimensions

WeightRpNPT DN

L L2 E F G H1 H2 H3 H4 Bmm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch kg lbs

VAx 115 12 15 75 29 ndash ndash 75 29 15 06 ndash ndash 143 56 82 32 161 63 117 46 97 38 18 40VAH 115 12 15 75 29 ndash ndash 75 29 15 06 ndash ndash 143 56 100 39 161 63 135 53 97 38 2 44VAx 120 34 20 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 82 33 161 63 117 46 97 38 19 42VAH 120 34 20 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 100 39 161 63 135 53 97 38 21 46VAx 125 1 25 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 82 33 161 63 117 46 97 38 19 42VAH 125 1 25 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 100 39 161 63 135 53 97 38 21 46VAx 240 112 40 128 50 200 79 85 33 29 11 66 26 170 67 112 44 191 75 162 64 125 49 44 97VAH 240 112 40 128 50 200 79 85 33 29 11 66 26 170 67 132 52 191 75 182 72 125 49 47 104VAx 350 2 50 155 61 230 91 85 33 36 14 74 29 180 70 135 53 201 79 196 77 160 63 61 134VAH 350 2 50 155 61 230 91 85 33 36 14 74 29 180 70 156 61 201 79 217 85 160 63 64 141

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 52

10 Converting unitssee wwwadlatusorg

11 Maintenance cyclesAt least once per annum at least twice per annum for biologi-cally produced methaneIf the flow rate drops clean the strainer

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 53

12 Glossary12 1 Diagnostic coverage DCMeasure of the effectiveness of diagnostics which may be determined as the ratio between the failure rate of detected dangerous failures and the failure rate of total dangerous failuresNOTE Diagnostic coverage can exist for the whole or parts of a safety-related system For example diagnostic cover-age could exist for sensors andor logic system andor final elements Unit see EN ISO 13849-12008

12 2 Mode of operationHigh demand mode or continuous modeOperating mode where the frequency of demands for opera-tion made on a safety-related system is greater than one per year or greater than twice the proof-test frequencysee EN 61508-42008

12 3 CategoryClassification of the safety-related parts of a control system in respect of their resistance to faults and their subsequent behaviour in the fault condition and which is achieved by the structural arrangement of the parts fault detection andor by their reliability see EN ISO 13849-12008

12 4 Common cause failure CCFFailures of different items resulting from a single event where these failures are not consequences of each othersee EN ISO 13849-12008

12 5 Fraction of undetected common cause failures β Fraction of undetected failures of redundant components due to a single event whereby these failures are not based on mutual causesNOTE β is expressed as a fraction in the equations and as a percentage elsewheresee EN 61508-62010

12 6 B10d valueMean number of cycles until 10 of the components fail dan-gerouslysee EN ISO 13849-12008

12 7 T10d valueMean time until 10 of the components fail dangerouslysee EN ISO 13849-12008

12 8 Hardware fault tolerance HFTA hardware fault tolerance of N means that N + 1 is the mini-mum number of faults that could cause a loss of the safety functionsee IEC 61508-22010

12 9 Mean dangerous failure rate λD Mean rate of dangerous failures during operation time (T10d) Unit 1hsee EN ISO 13849-12008

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 54

12 10 Safe failure fraction SFFFraction of safe failures related to all failures which are as-sumed to appearsee EN 13611A22011

12 11 Probability of dangerous failure PFHD Value describing the likelihood of dangerous failure per hour of a component for high demand mode or continuous mode Unit 1hsee EN 13611A22011

12 12 Mean time to dangerous failure MTTFd Expectation of the mean time to dangerous failuresee EN ISO 13849-12008

12 13 Demand rate nop Mean number of annual operationssee EN ISO 13849-12008

12 14 Average probability of dangerous failure on demand PFDavg (LDM = 1 ndash 10 switching cyclesyear)Average probability of a dangerous failure of the safety function on demand (LDM = low demand mode)see EN 61508-6

Glossary

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415

Finally we are offering you the opportunity to assess this ldquoTechnical Information (TI)rdquo and to give us your opinion so that we can improve our documents further and suit them to your needs

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Remarks

(Adobe Reader 7 or higher required) wwwadobecom

Elster GmbH Postfach 2809 middot 49018 Osnabruumlck Strotheweg 1 middot 49504 Lotte (Buumlren) GermanyT +49 541 1214-0 F +49 541 1214-370 infokromschroedercomwwwkromschroedercom

The current addresses of our international agents are available on the Internetwwwkromschroederdeindexphpid=718ampL=1

We reserve the right to make technical modifications in the interests of progressCopyright copy 2015 Elster GmbH All rights reserved

Contact

Feedback

0325

0530

  • Pressure regulators with solenoid valve VAD VAG VAV VAH
  • Flow rate regulator VRH
  • Pressure regulators with double solenoid valve VCD VCG VCV VCH
  • Contents
  • 1 Application
    • 11 Examples of application
      • 111 Constant pressure control
      • 112 Constant pressure control with two gas solenoid valves
      • 113 Constant pressure control with max pressure switch
      • 114 Constant pressure control with non-controlled pilot gas outlet
      • 115 Modulating control
      • 116 Modulating control with two gas solenoid valves
      • 117 Modulating control with two gas solenoid valves and inlet pressure switch
      • 118 HighLow control
      • 119 Zero pressure control
      • 1110 Staged flow rate control
      • 1111 Continuous or staged flow rate control
      • 1112 Modulating control with variable airgas ratio control with gas solenoid valve
      • 1113 Modulating control in residential heat generation
          • 2 Certification
          • 3 Function
            • 31 VAD VAG VAH VRH VAV
              • 311 Pressure regulator for gas VAD
              • 312 Airgas ratio control VAG
              • 313 Flow rate regulators VAH VRH
              • 314 Variable airgas ratio control VAV
              • 315 Pressure regulator with gas solenoid valve VAxS position indicator with visual indicator
                • 32 Animation
                • 33 Connection diagram
                  • 331 VAx with M20 cable gland
                  • 332 VAx with plug
                  • 333 VAS with VADVAGVAHVAV with M20 cable gland
                  • 334 VAS with VADVAGVAHVAV with plug
                      • 4 Replacement possibilities for MODULINE pressure regulators with gas solenoid valve
                        • 41 GVS GVI GVIB GVR and GVRH are to be replaced by VAD VAG VAG+VAS VAH and VAV
                          • 5 Flow rate
                            • 51 Selection example for VAD
                              • 511 Calculate VAD
                                • 52 Selection example for VAG VAH VRH VAV
                                  • 521 CalculateVAG VxHVAV
                                    • 53 Selection example for zero governor VAGN
                                      • 531 Calculate VAGN
                                          • 6 Selection
                                            • 61 Selection table for pressure regulator with solenoid valve VAD
                                            • 62 Type code for VAD
                                            • 63 Selection table for airgas ratio control with solenoid valve VAG flow rate regulators VAH VRH
                                            • 64 Type code for VAG VAH VRH
                                            • 65 Selection table for variable airgas ratio control with solenoid valve VAV
                                            • 66 Type code for VAV
                                            • 67 Accessories
                                              • 7 Project planning information
                                                • 71 Installation
                                                  • 711 Installation position
                                                    • 72 Setting the low-fire rate on VAG VAH VRH VAV
                                                    • 73 Setting the high-fire rate on VAV
                                                      • 731 Calculation
                                                          • 8 Accessories
                                                            • 81 Gas pressure switch DGVC for VAx VRH
                                                            • 82 Gas pressure switch DGVCT for VAxT VRHT
                                                            • 83 Bypass valvepilot gas valve VAS 1
                                                              • 831 VAS 1 attached to VADVAGVAHVAV 1
                                                              • 832 VAS 1 attached to VADVAGVAHVAV 2 VADVAGVAHVAV 3
                                                              • 833 Flow rate
                                                                • 84 Bypass valvepilot gas valve VBY 8 for VADVAGVAHVAV 1
                                                                  • 841 Scope of delivery VBY 8I as bypass valve
                                                                  • 842 Scope of delivery VBY 8R as pilot gas valve
                                                                  • 843 Selection
                                                                  • 844 Type code
                                                                  • 845 Flow rate
                                                                  • 846 Technical data
                                                                    • 85 Tightness control TC 116V
                                                                    • 86 Pressure test points
                                                                    • 87 Cable gland set
                                                                    • 88 Seal set VA 1thinspndashthinsp3
                                                                    • 89 Differential pressure orifice
                                                                    • 810 Retaining frame
                                                                    • 811 Attachment block
                                                                    • 812 Gas control line
                                                                    • 813 Measuring orifice VMO
                                                                    • 814 Filter module VMF
                                                                    • 815 Fine-adjusting valve VMV
                                                                      • 9 Technical data
                                                                        • 91 VAD
                                                                        • 92 VAG
                                                                        • 93 VAH VRH
                                                                        • 94 VAV
                                                                        • 95 Safety-specific characteristic values for VAx 1thinspndashthinsp3
                                                                          • 951 Determining the PFHD value the λD value and the MTTFd value
                                                                          • 952 Calculating the PFHD and PFDavg
                                                                            • 96 Dimensions
                                                                              • 10 Converting units
                                                                              • 11 Maintenance cycles
                                                                              • 12 Glossary
                                                                                • 121 Diagnostic coverage DC
                                                                                • 122 Mode of operation
                                                                                • 123 Category
                                                                                • 124 Common cause failure CCF
                                                                                • 125 Fraction of undetected common cause failures β
                                                                                • 126 B10d value
                                                                                • 127 T10d value
                                                                                • 128 Hardware fault tolerance HFT
                                                                                • 129 Mean dangerous failure rate λD
                                                                                • 1210 Safe failure fraction SFF
                                                                                • 1211 Probability of dangerous failure PFHD
                                                                                • 1212 Mean time to dangerous failure MTTFd
                                                                                • 1213 Demand rate nop
                                                                                • 1214 Average probability of dangerous failure on demand PFDavg
                                                                                  • Feedback
                                                                                  • Contact
                                                                                      1. naechste_Seite 24
                                                                                      2. naechste Seite 18
                                                                                      3. naechste Seite 6
                                                                                      4. naechste Seite 16
                                                                                      5. naechste Seite 14
                                                                                      6. naechste Seite 25
                                                                                      7. naechste_Seite 11
                                                                                      8. naechste_Seite 17
                                                                                      9. fbArbeitspunkt_Min Ja
                                                                                      10. fbArbeitspunkt Ja
                                                                                      11. ftProgramm Standard-Programm
                                                                                      12. fz_kv
                                                                                      13. fz_pe 80
                                                                                      14. fz_pG 60
                                                                                      15. fzDelta_p_Soll 20
                                                                                      16. ftEinheit_Druck mbar
                                                                                      17. fatTyp [115]
                                                                                      18. fbArbeitspunkt_Min_2 Ja
                                                                                      19. fbArbeitspunkt_2 Ja
                                                                                      20. ftRegler_Typ VAG
                                                                                      21. ftProgramm_2 Standard-Programm
                                                                                      22. fz_kv_2
                                                                                      23. fatMedium [08]
                                                                                      24. fzDichte 08
                                                                                      25. ftEinheit_Dichte kgm3
                                                                                      26. fzV_Norm 30
                                                                                      27. ftEinheit_Volstrom m3h
                                                                                      28. fz_pe_2 80
                                                                                      29. fz_pG_2 60
                                                                                      30. fzDelta_p_Soll_2 20
                                                                                      31. ftEinheit_Druck2 [mbar]
                                                                                      32. ftEinheit_Geschw [ms]
                                                                                      33. fatTyp_2 [10954451150103322]
                                                                                      34. fbArbeitspunkt_Min_3 Ja
                                                                                      35. fbArbeitspunkt_3 Ja
                                                                                      36. ftProgramm_3 Standard-Programm
                                                                                      37. fz_kv_3
                                                                                      38. fz_pe_3 20
                                                                                      39. fz_pG_3 0
                                                                                      40. fzDelta_p_Soll_3 20
                                                                                      41. fatTyp_3 [123]
                                                                                      42. fatSchaltleistung [6363683]
                                                                                      43. fz_nop_Stunde 1
                                                                                      44. fz_nop_Jahr 8760
                                                                                      45. fzZyklus 3600
                                                                                      46. fzB10d 6363683
                                                                                      47. fzT10d 10
                                                                                      48. fzPFHd_1V 15714170551864384e-8
                                                                                      49. fzPFDavg_1V
                                                                                      50. ftGeeignet_1V PL d SIL 2
                                                                                      51. fzPFHd_2V 33505832253532625e-10
                                                                                      52. fzPFDavg_2V
                                                                                      53. ftGeeignet_2V PL e SIL 3
                                                                                      54. ftUebersicht Off
                                                                                      55. ftVerstaendlichkeit Off
                                                                                      56. ftFehlende_Info
                                                                                      57. ftUmfang Off
                                                                                      58. ftVerwendung_1 Off
                                                                                      59. ftVerwendung_2 Off
                                                                                      60. ftVerwendung_3 Off
                                                                                      61. ftVerwendung_4 Off
                                                                                      62. ftNavigation Off
                                                                                      63. ftTaetigkeitsbereich Off
                                                                                      64. ftBemerkung
                                                                                      65. Michael Rehkamp Elster Kromschroumlder>btnSenden
Page 47: VAD, VAG, VAV, VAH, VRH, VCD, VCG, VCV, VCH · PDF fileVAD, VAG, VAH, VAV, VRH, VCD, VCG, VCV, VCH · Edition 04.15 6 VAD VAD VAS 1 .1 Examples of application 1 .1 .1 Constant pressure

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 47

Position indicator contact rating

Type Voltage Min current(resistive load)

Max current(resistive load)

VAxS VCxS 12 ndash 250 V AC 5060 Hz 100 mA 3 AVAxG VCxG 12 ndash 30 V DC 2 mA 01 A

Position indicator switching frequency max 5 times per minute

Switching current [A]

Switching cyclescos φ = 1 cos φ = 06

01 500000 50000005 300000 250000

1 200000 1000003 100000 ndash

Limited to max 200000 cycles for heating systems

9 1 VADOutlet pressure pd VAD-25 25 ndash 25 mbar (1 ndash 10 WC) VAD-50 20 ndash 50 mbar (8 ndash 20 WC) VAD-100 35 ndash 100 mbar (14 ndash 40 WC)Combustion chamber control pressure psc (connection psa)

-20 to +20 mbar (-78 to +78 WC)

VAD

pu

pd

(psa)

9 2 VAGOutlet pressure pd 05 ndash 100 mbar (02 ndash 40 WC)Air control pressure psa 05 ndash 100 mbar (02 ndash 40 WC)

Adjusting range at low fire plusmn5 mbar (plusmn2 WC)Transmission ratio of gas to air 11The inlet pressure must always be higher than the air control pressure psa + pressure loss ∆p + 5 mbar (2 WC)

VAGpd

pu

psa

psa

VAGK 1 x 18 coupling for plastic hose (internal dia 39 mm (015) external dia 61 mm (024)) or VAGE 1 x 18 compression fitting for 6 times 1 tube or VAGA 1 x NPT 18 adapter or VAGN zero governor with breathing orifice

9 3 VAH VRHAir control pressure psa 06 ndash 100 mbar (024 ndash 40 WC) Differential air pressure ∆psa (psa - psa-) 06 ndash 50 mbar (024 ndash 197 WC) Differential gas pressure ∆pd (pd - pd-) 06 ndash 50 mbar (024 ndash 197 WC)Transmission ratio of gas to air 11The inlet pressure must always be higher than the differen-tial air pressure ∆psa + pressure loss ∆p + max gas pres-sure on burner + 5 mbar (2 WC)Adjusting range at low fire plusmn5 mbar (plusmn2 WC)

Technical data

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 48

VAHVRH

pd-

pu

psa-

psa

Connection of the air control pressure psaVAHE VRHE 3 x 18 compression fitting for 6 times 1 tube or VAHA VRHA 3 x NPT 18 adapter

9 4 VAVOutlet pressure pd 05 ndash 30 mbar (02 ndash 117 WC)Air control pressure psa 04 ndash 30 mbar (015 ndash 117 WC)Combustion chamber control pressure psc

-20 to +20 mbar (-78 to +78 WC)Min control pressure differential psa - psc 04 mbar (015 WC)Min pressure differential pd - psc 05 mbar (02 WC)Adjusting range at low fire plusmn15 mbar (plusmn06 WC)Transmission ratio of gas to air 061 to 31The inlet pressure pu must always be higher than the air control pressure psa times transmission ratio V + pressure loss ∆p + 15 mbar (06 WC)

pu

pd psapsc

VAV

VAVK 2 x plastic hose couplings (internal dia 39 mm (015) external dia 61 mm (024)) or VAVE 2 x 18 compression fitting for 6 times 1 tube or VAVA 2 x NPT 18 adapter

Technical data

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 49

9 5 Safety-specific characteristic values for VAx 1 ndash 3For SILSuitable for Safety Integrity Level SIL 1 2 3

Diagnostic coverage DC 0

Type of subsystem Type A to EN 61508-2 74312

Operating mode High demand mode pursu-ant to EN 61508-4 3512

For PLSuitable for Performance Level PL a b c d e

Category B 1 2 3 4Common cause failure CCF gt 65Application of essential safety requirements Satisfied

Application of tried-and-tested safety requirements Satisfied

For SIL and PL

B10d value

Operating cyclesVAD VAG VAV VAH 1 10094360VAD VAG VAV VAH 2 8229021VAD VAG VAV VAH 3 6363683

Hardware fault tolerance (1 valve) HFT 0

Hardware fault tolerance (2 valves) HFT 1

Safe failure fraction SFF gt 90Fraction of undetected com-mon cause failures β ge 2

Max service life under operating conditions10 years after date of production plus max 12 year in stor-age prior to first use or once the given number of operating cycles has been reached depending on which is achieved firstThe devices are suitable for single-channel systems (HFT = 0) up to SIL 2PL d and up to SIL 3PL e when two re-dundant valves are installed in a double-channel architecture (HFT = 1) provided that the complete system complies with the requirements of EN 61508ISO 13849

For a glossary of terms see page 53 (Glossary)

Technical data

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 50

nop 1hnop 1a

sB10d

T10d aPFHD (1 VAx) 1h

PFHD (2 VAx) 1h

PFDavg (1 VAx)

PFDavg (2 VAx)

Technical data gt Safety-specific characteristic values for VAx 1 ndash 3

9 5 1 Determining the PFHD value the λD value and the MTTFd value

PFHD = λD = x nop= 1MTTFd

01B10d

PFDavg = x λD x 24 x 365 x T10d 12

Type

Cycle time

suitable for

suitable for

PFHD = Probability of dangerous failure (HDM = high de-mand mode) [1hour]PFDavg = Average probability of dangerous failure on de-mand (LDM = low demand mode)λD = Mean dangerous failure rate [1hour]MTTFd = Mean time to dangerous failure [hours]nop = Demand rate (mean number of annual operations) [1hour]

9 5 2 Calculating the PFHD and PFDavg

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 51

VAD VAG VAH VAV

H1

Rp frac14(NPT frac14)

H2

E

LF

F

H4

H3

B

VAxS VAxF

L2G

G

Technical data

9 6 Dimensions

Type

Connec-tion Dimensions

WeightRpNPT DN

L L2 E F G H1 H2 H3 H4 Bmm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch kg lbs

VAx 115 12 15 75 29 ndash ndash 75 29 15 06 ndash ndash 143 56 82 32 161 63 117 46 97 38 18 40VAH 115 12 15 75 29 ndash ndash 75 29 15 06 ndash ndash 143 56 100 39 161 63 135 53 97 38 2 44VAx 120 34 20 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 82 33 161 63 117 46 97 38 19 42VAH 120 34 20 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 100 39 161 63 135 53 97 38 21 46VAx 125 1 25 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 82 33 161 63 117 46 97 38 19 42VAH 125 1 25 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 100 39 161 63 135 53 97 38 21 46VAx 240 112 40 128 50 200 79 85 33 29 11 66 26 170 67 112 44 191 75 162 64 125 49 44 97VAH 240 112 40 128 50 200 79 85 33 29 11 66 26 170 67 132 52 191 75 182 72 125 49 47 104VAx 350 2 50 155 61 230 91 85 33 36 14 74 29 180 70 135 53 201 79 196 77 160 63 61 134VAH 350 2 50 155 61 230 91 85 33 36 14 74 29 180 70 156 61 201 79 217 85 160 63 64 141

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 52

10 Converting unitssee wwwadlatusorg

11 Maintenance cyclesAt least once per annum at least twice per annum for biologi-cally produced methaneIf the flow rate drops clean the strainer

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 53

12 Glossary12 1 Diagnostic coverage DCMeasure of the effectiveness of diagnostics which may be determined as the ratio between the failure rate of detected dangerous failures and the failure rate of total dangerous failuresNOTE Diagnostic coverage can exist for the whole or parts of a safety-related system For example diagnostic cover-age could exist for sensors andor logic system andor final elements Unit see EN ISO 13849-12008

12 2 Mode of operationHigh demand mode or continuous modeOperating mode where the frequency of demands for opera-tion made on a safety-related system is greater than one per year or greater than twice the proof-test frequencysee EN 61508-42008

12 3 CategoryClassification of the safety-related parts of a control system in respect of their resistance to faults and their subsequent behaviour in the fault condition and which is achieved by the structural arrangement of the parts fault detection andor by their reliability see EN ISO 13849-12008

12 4 Common cause failure CCFFailures of different items resulting from a single event where these failures are not consequences of each othersee EN ISO 13849-12008

12 5 Fraction of undetected common cause failures β Fraction of undetected failures of redundant components due to a single event whereby these failures are not based on mutual causesNOTE β is expressed as a fraction in the equations and as a percentage elsewheresee EN 61508-62010

12 6 B10d valueMean number of cycles until 10 of the components fail dan-gerouslysee EN ISO 13849-12008

12 7 T10d valueMean time until 10 of the components fail dangerouslysee EN ISO 13849-12008

12 8 Hardware fault tolerance HFTA hardware fault tolerance of N means that N + 1 is the mini-mum number of faults that could cause a loss of the safety functionsee IEC 61508-22010

12 9 Mean dangerous failure rate λD Mean rate of dangerous failures during operation time (T10d) Unit 1hsee EN ISO 13849-12008

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 54

12 10 Safe failure fraction SFFFraction of safe failures related to all failures which are as-sumed to appearsee EN 13611A22011

12 11 Probability of dangerous failure PFHD Value describing the likelihood of dangerous failure per hour of a component for high demand mode or continuous mode Unit 1hsee EN 13611A22011

12 12 Mean time to dangerous failure MTTFd Expectation of the mean time to dangerous failuresee EN ISO 13849-12008

12 13 Demand rate nop Mean number of annual operationssee EN ISO 13849-12008

12 14 Average probability of dangerous failure on demand PFDavg (LDM = 1 ndash 10 switching cyclesyear)Average probability of a dangerous failure of the safety function on demand (LDM = low demand mode)see EN 61508-6

Glossary

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415

Finally we are offering you the opportunity to assess this ldquoTechnical Information (TI)rdquo and to give us your opinion so that we can improve our documents further and suit them to your needs

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ScopeToo littleSufficientToo wideNo answer

No answer

NavigationI can find my way aroundI got ldquolostrdquoNo answer

UseTo get to know the productTo choose a productPlanningTo look for information

My scope of functionsTechnical departmentSalesNo answer

Remarks

(Adobe Reader 7 or higher required) wwwadobecom

Elster GmbH Postfach 2809 middot 49018 Osnabruumlck Strotheweg 1 middot 49504 Lotte (Buumlren) GermanyT +49 541 1214-0 F +49 541 1214-370 infokromschroedercomwwwkromschroedercom

The current addresses of our international agents are available on the Internetwwwkromschroederdeindexphpid=718ampL=1

We reserve the right to make technical modifications in the interests of progressCopyright copy 2015 Elster GmbH All rights reserved

Contact

Feedback

0325

0530

  • Pressure regulators with solenoid valve VAD VAG VAV VAH
  • Flow rate regulator VRH
  • Pressure regulators with double solenoid valve VCD VCG VCV VCH
  • Contents
  • 1 Application
    • 11 Examples of application
      • 111 Constant pressure control
      • 112 Constant pressure control with two gas solenoid valves
      • 113 Constant pressure control with max pressure switch
      • 114 Constant pressure control with non-controlled pilot gas outlet
      • 115 Modulating control
      • 116 Modulating control with two gas solenoid valves
      • 117 Modulating control with two gas solenoid valves and inlet pressure switch
      • 118 HighLow control
      • 119 Zero pressure control
      • 1110 Staged flow rate control
      • 1111 Continuous or staged flow rate control
      • 1112 Modulating control with variable airgas ratio control with gas solenoid valve
      • 1113 Modulating control in residential heat generation
          • 2 Certification
          • 3 Function
            • 31 VAD VAG VAH VRH VAV
              • 311 Pressure regulator for gas VAD
              • 312 Airgas ratio control VAG
              • 313 Flow rate regulators VAH VRH
              • 314 Variable airgas ratio control VAV
              • 315 Pressure regulator with gas solenoid valve VAxS position indicator with visual indicator
                • 32 Animation
                • 33 Connection diagram
                  • 331 VAx with M20 cable gland
                  • 332 VAx with plug
                  • 333 VAS with VADVAGVAHVAV with M20 cable gland
                  • 334 VAS with VADVAGVAHVAV with plug
                      • 4 Replacement possibilities for MODULINE pressure regulators with gas solenoid valve
                        • 41 GVS GVI GVIB GVR and GVRH are to be replaced by VAD VAG VAG+VAS VAH and VAV
                          • 5 Flow rate
                            • 51 Selection example for VAD
                              • 511 Calculate VAD
                                • 52 Selection example for VAG VAH VRH VAV
                                  • 521 CalculateVAG VxHVAV
                                    • 53 Selection example for zero governor VAGN
                                      • 531 Calculate VAGN
                                          • 6 Selection
                                            • 61 Selection table for pressure regulator with solenoid valve VAD
                                            • 62 Type code for VAD
                                            • 63 Selection table for airgas ratio control with solenoid valve VAG flow rate regulators VAH VRH
                                            • 64 Type code for VAG VAH VRH
                                            • 65 Selection table for variable airgas ratio control with solenoid valve VAV
                                            • 66 Type code for VAV
                                            • 67 Accessories
                                              • 7 Project planning information
                                                • 71 Installation
                                                  • 711 Installation position
                                                    • 72 Setting the low-fire rate on VAG VAH VRH VAV
                                                    • 73 Setting the high-fire rate on VAV
                                                      • 731 Calculation
                                                          • 8 Accessories
                                                            • 81 Gas pressure switch DGVC for VAx VRH
                                                            • 82 Gas pressure switch DGVCT for VAxT VRHT
                                                            • 83 Bypass valvepilot gas valve VAS 1
                                                              • 831 VAS 1 attached to VADVAGVAHVAV 1
                                                              • 832 VAS 1 attached to VADVAGVAHVAV 2 VADVAGVAHVAV 3
                                                              • 833 Flow rate
                                                                • 84 Bypass valvepilot gas valve VBY 8 for VADVAGVAHVAV 1
                                                                  • 841 Scope of delivery VBY 8I as bypass valve
                                                                  • 842 Scope of delivery VBY 8R as pilot gas valve
                                                                  • 843 Selection
                                                                  • 844 Type code
                                                                  • 845 Flow rate
                                                                  • 846 Technical data
                                                                    • 85 Tightness control TC 116V
                                                                    • 86 Pressure test points
                                                                    • 87 Cable gland set
                                                                    • 88 Seal set VA 1thinspndashthinsp3
                                                                    • 89 Differential pressure orifice
                                                                    • 810 Retaining frame
                                                                    • 811 Attachment block
                                                                    • 812 Gas control line
                                                                    • 813 Measuring orifice VMO
                                                                    • 814 Filter module VMF
                                                                    • 815 Fine-adjusting valve VMV
                                                                      • 9 Technical data
                                                                        • 91 VAD
                                                                        • 92 VAG
                                                                        • 93 VAH VRH
                                                                        • 94 VAV
                                                                        • 95 Safety-specific characteristic values for VAx 1thinspndashthinsp3
                                                                          • 951 Determining the PFHD value the λD value and the MTTFd value
                                                                          • 952 Calculating the PFHD and PFDavg
                                                                            • 96 Dimensions
                                                                              • 10 Converting units
                                                                              • 11 Maintenance cycles
                                                                              • 12 Glossary
                                                                                • 121 Diagnostic coverage DC
                                                                                • 122 Mode of operation
                                                                                • 123 Category
                                                                                • 124 Common cause failure CCF
                                                                                • 125 Fraction of undetected common cause failures β
                                                                                • 126 B10d value
                                                                                • 127 T10d value
                                                                                • 128 Hardware fault tolerance HFT
                                                                                • 129 Mean dangerous failure rate λD
                                                                                • 1210 Safe failure fraction SFF
                                                                                • 1211 Probability of dangerous failure PFHD
                                                                                • 1212 Mean time to dangerous failure MTTFd
                                                                                • 1213 Demand rate nop
                                                                                • 1214 Average probability of dangerous failure on demand PFDavg
                                                                                  • Feedback
                                                                                  • Contact
                                                                                      1. naechste_Seite 24
                                                                                      2. naechste Seite 18
                                                                                      3. naechste Seite 6
                                                                                      4. naechste Seite 16
                                                                                      5. naechste Seite 14
                                                                                      6. naechste Seite 25
                                                                                      7. naechste_Seite 11
                                                                                      8. naechste_Seite 17
                                                                                      9. fbArbeitspunkt_Min Ja
                                                                                      10. fbArbeitspunkt Ja
                                                                                      11. ftProgramm Standard-Programm
                                                                                      12. fz_kv
                                                                                      13. fz_pe 80
                                                                                      14. fz_pG 60
                                                                                      15. fzDelta_p_Soll 20
                                                                                      16. ftEinheit_Druck mbar
                                                                                      17. fatTyp [115]
                                                                                      18. fbArbeitspunkt_Min_2 Ja
                                                                                      19. fbArbeitspunkt_2 Ja
                                                                                      20. ftRegler_Typ VAG
                                                                                      21. ftProgramm_2 Standard-Programm
                                                                                      22. fz_kv_2
                                                                                      23. fatMedium [08]
                                                                                      24. fzDichte 08
                                                                                      25. ftEinheit_Dichte kgm3
                                                                                      26. fzV_Norm 30
                                                                                      27. ftEinheit_Volstrom m3h
                                                                                      28. fz_pe_2 80
                                                                                      29. fz_pG_2 60
                                                                                      30. fzDelta_p_Soll_2 20
                                                                                      31. ftEinheit_Druck2 [mbar]
                                                                                      32. ftEinheit_Geschw [ms]
                                                                                      33. fatTyp_2 [10954451150103322]
                                                                                      34. fbArbeitspunkt_Min_3 Ja
                                                                                      35. fbArbeitspunkt_3 Ja
                                                                                      36. ftProgramm_3 Standard-Programm
                                                                                      37. fz_kv_3
                                                                                      38. fz_pe_3 20
                                                                                      39. fz_pG_3 0
                                                                                      40. fzDelta_p_Soll_3 20
                                                                                      41. fatTyp_3 [123]
                                                                                      42. fatSchaltleistung [6363683]
                                                                                      43. fz_nop_Stunde 1
                                                                                      44. fz_nop_Jahr 8760
                                                                                      45. fzZyklus 3600
                                                                                      46. fzB10d 6363683
                                                                                      47. fzT10d 10
                                                                                      48. fzPFHd_1V 15714170551864384e-8
                                                                                      49. fzPFDavg_1V
                                                                                      50. ftGeeignet_1V PL d SIL 2
                                                                                      51. fzPFHd_2V 33505832253532625e-10
                                                                                      52. fzPFDavg_2V
                                                                                      53. ftGeeignet_2V PL e SIL 3
                                                                                      54. ftUebersicht Off
                                                                                      55. ftVerstaendlichkeit Off
                                                                                      56. ftFehlende_Info
                                                                                      57. ftUmfang Off
                                                                                      58. ftVerwendung_1 Off
                                                                                      59. ftVerwendung_2 Off
                                                                                      60. ftVerwendung_3 Off
                                                                                      61. ftVerwendung_4 Off
                                                                                      62. ftNavigation Off
                                                                                      63. ftTaetigkeitsbereich Off
                                                                                      64. ftBemerkung
                                                                                      65. Michael Rehkamp Elster Kromschroumlder>btnSenden
Page 48: VAD, VAG, VAV, VAH, VRH, VCD, VCG, VCV, VCH · PDF fileVAD, VAG, VAH, VAV, VRH, VCD, VCG, VCV, VCH · Edition 04.15 6 VAD VAD VAS 1 .1 Examples of application 1 .1 .1 Constant pressure

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 48

VAHVRH

pd-

pu

psa-

psa

Connection of the air control pressure psaVAHE VRHE 3 x 18 compression fitting for 6 times 1 tube or VAHA VRHA 3 x NPT 18 adapter

9 4 VAVOutlet pressure pd 05 ndash 30 mbar (02 ndash 117 WC)Air control pressure psa 04 ndash 30 mbar (015 ndash 117 WC)Combustion chamber control pressure psc

-20 to +20 mbar (-78 to +78 WC)Min control pressure differential psa - psc 04 mbar (015 WC)Min pressure differential pd - psc 05 mbar (02 WC)Adjusting range at low fire plusmn15 mbar (plusmn06 WC)Transmission ratio of gas to air 061 to 31The inlet pressure pu must always be higher than the air control pressure psa times transmission ratio V + pressure loss ∆p + 15 mbar (06 WC)

pu

pd psapsc

VAV

VAVK 2 x plastic hose couplings (internal dia 39 mm (015) external dia 61 mm (024)) or VAVE 2 x 18 compression fitting for 6 times 1 tube or VAVA 2 x NPT 18 adapter

Technical data

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 49

9 5 Safety-specific characteristic values for VAx 1 ndash 3For SILSuitable for Safety Integrity Level SIL 1 2 3

Diagnostic coverage DC 0

Type of subsystem Type A to EN 61508-2 74312

Operating mode High demand mode pursu-ant to EN 61508-4 3512

For PLSuitable for Performance Level PL a b c d e

Category B 1 2 3 4Common cause failure CCF gt 65Application of essential safety requirements Satisfied

Application of tried-and-tested safety requirements Satisfied

For SIL and PL

B10d value

Operating cyclesVAD VAG VAV VAH 1 10094360VAD VAG VAV VAH 2 8229021VAD VAG VAV VAH 3 6363683

Hardware fault tolerance (1 valve) HFT 0

Hardware fault tolerance (2 valves) HFT 1

Safe failure fraction SFF gt 90Fraction of undetected com-mon cause failures β ge 2

Max service life under operating conditions10 years after date of production plus max 12 year in stor-age prior to first use or once the given number of operating cycles has been reached depending on which is achieved firstThe devices are suitable for single-channel systems (HFT = 0) up to SIL 2PL d and up to SIL 3PL e when two re-dundant valves are installed in a double-channel architecture (HFT = 1) provided that the complete system complies with the requirements of EN 61508ISO 13849

For a glossary of terms see page 53 (Glossary)

Technical data

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 50

nop 1hnop 1a

sB10d

T10d aPFHD (1 VAx) 1h

PFHD (2 VAx) 1h

PFDavg (1 VAx)

PFDavg (2 VAx)

Technical data gt Safety-specific characteristic values for VAx 1 ndash 3

9 5 1 Determining the PFHD value the λD value and the MTTFd value

PFHD = λD = x nop= 1MTTFd

01B10d

PFDavg = x λD x 24 x 365 x T10d 12

Type

Cycle time

suitable for

suitable for

PFHD = Probability of dangerous failure (HDM = high de-mand mode) [1hour]PFDavg = Average probability of dangerous failure on de-mand (LDM = low demand mode)λD = Mean dangerous failure rate [1hour]MTTFd = Mean time to dangerous failure [hours]nop = Demand rate (mean number of annual operations) [1hour]

9 5 2 Calculating the PFHD and PFDavg

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 51

VAD VAG VAH VAV

H1

Rp frac14(NPT frac14)

H2

E

LF

F

H4

H3

B

VAxS VAxF

L2G

G

Technical data

9 6 Dimensions

Type

Connec-tion Dimensions

WeightRpNPT DN

L L2 E F G H1 H2 H3 H4 Bmm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch kg lbs

VAx 115 12 15 75 29 ndash ndash 75 29 15 06 ndash ndash 143 56 82 32 161 63 117 46 97 38 18 40VAH 115 12 15 75 29 ndash ndash 75 29 15 06 ndash ndash 143 56 100 39 161 63 135 53 97 38 2 44VAx 120 34 20 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 82 33 161 63 117 46 97 38 19 42VAH 120 34 20 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 100 39 161 63 135 53 97 38 21 46VAx 125 1 25 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 82 33 161 63 117 46 97 38 19 42VAH 125 1 25 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 100 39 161 63 135 53 97 38 21 46VAx 240 112 40 128 50 200 79 85 33 29 11 66 26 170 67 112 44 191 75 162 64 125 49 44 97VAH 240 112 40 128 50 200 79 85 33 29 11 66 26 170 67 132 52 191 75 182 72 125 49 47 104VAx 350 2 50 155 61 230 91 85 33 36 14 74 29 180 70 135 53 201 79 196 77 160 63 61 134VAH 350 2 50 155 61 230 91 85 33 36 14 74 29 180 70 156 61 201 79 217 85 160 63 64 141

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 52

10 Converting unitssee wwwadlatusorg

11 Maintenance cyclesAt least once per annum at least twice per annum for biologi-cally produced methaneIf the flow rate drops clean the strainer

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 53

12 Glossary12 1 Diagnostic coverage DCMeasure of the effectiveness of diagnostics which may be determined as the ratio between the failure rate of detected dangerous failures and the failure rate of total dangerous failuresNOTE Diagnostic coverage can exist for the whole or parts of a safety-related system For example diagnostic cover-age could exist for sensors andor logic system andor final elements Unit see EN ISO 13849-12008

12 2 Mode of operationHigh demand mode or continuous modeOperating mode where the frequency of demands for opera-tion made on a safety-related system is greater than one per year or greater than twice the proof-test frequencysee EN 61508-42008

12 3 CategoryClassification of the safety-related parts of a control system in respect of their resistance to faults and their subsequent behaviour in the fault condition and which is achieved by the structural arrangement of the parts fault detection andor by their reliability see EN ISO 13849-12008

12 4 Common cause failure CCFFailures of different items resulting from a single event where these failures are not consequences of each othersee EN ISO 13849-12008

12 5 Fraction of undetected common cause failures β Fraction of undetected failures of redundant components due to a single event whereby these failures are not based on mutual causesNOTE β is expressed as a fraction in the equations and as a percentage elsewheresee EN 61508-62010

12 6 B10d valueMean number of cycles until 10 of the components fail dan-gerouslysee EN ISO 13849-12008

12 7 T10d valueMean time until 10 of the components fail dangerouslysee EN ISO 13849-12008

12 8 Hardware fault tolerance HFTA hardware fault tolerance of N means that N + 1 is the mini-mum number of faults that could cause a loss of the safety functionsee IEC 61508-22010

12 9 Mean dangerous failure rate λD Mean rate of dangerous failures during operation time (T10d) Unit 1hsee EN ISO 13849-12008

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 54

12 10 Safe failure fraction SFFFraction of safe failures related to all failures which are as-sumed to appearsee EN 13611A22011

12 11 Probability of dangerous failure PFHD Value describing the likelihood of dangerous failure per hour of a component for high demand mode or continuous mode Unit 1hsee EN 13611A22011

12 12 Mean time to dangerous failure MTTFd Expectation of the mean time to dangerous failuresee EN ISO 13849-12008

12 13 Demand rate nop Mean number of annual operationssee EN ISO 13849-12008

12 14 Average probability of dangerous failure on demand PFDavg (LDM = 1 ndash 10 switching cyclesyear)Average probability of a dangerous failure of the safety function on demand (LDM = low demand mode)see EN 61508-6

Glossary

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415

Finally we are offering you the opportunity to assess this ldquoTechnical Information (TI)rdquo and to give us your opinion so that we can improve our documents further and suit them to your needs

ClarityFound information quicklySearched for a long timeDidnrsquot find informationWhat is missing

ComprehensionCoherentToo complicatedNo answer

ScopeToo littleSufficientToo wideNo answer

No answer

NavigationI can find my way aroundI got ldquolostrdquoNo answer

UseTo get to know the productTo choose a productPlanningTo look for information

My scope of functionsTechnical departmentSalesNo answer

Remarks

(Adobe Reader 7 or higher required) wwwadobecom

Elster GmbH Postfach 2809 middot 49018 Osnabruumlck Strotheweg 1 middot 49504 Lotte (Buumlren) GermanyT +49 541 1214-0 F +49 541 1214-370 infokromschroedercomwwwkromschroedercom

The current addresses of our international agents are available on the Internetwwwkromschroederdeindexphpid=718ampL=1

We reserve the right to make technical modifications in the interests of progressCopyright copy 2015 Elster GmbH All rights reserved

Contact

Feedback

0325

0530

  • Pressure regulators with solenoid valve VAD VAG VAV VAH
  • Flow rate regulator VRH
  • Pressure regulators with double solenoid valve VCD VCG VCV VCH
  • Contents
  • 1 Application
    • 11 Examples of application
      • 111 Constant pressure control
      • 112 Constant pressure control with two gas solenoid valves
      • 113 Constant pressure control with max pressure switch
      • 114 Constant pressure control with non-controlled pilot gas outlet
      • 115 Modulating control
      • 116 Modulating control with two gas solenoid valves
      • 117 Modulating control with two gas solenoid valves and inlet pressure switch
      • 118 HighLow control
      • 119 Zero pressure control
      • 1110 Staged flow rate control
      • 1111 Continuous or staged flow rate control
      • 1112 Modulating control with variable airgas ratio control with gas solenoid valve
      • 1113 Modulating control in residential heat generation
          • 2 Certification
          • 3 Function
            • 31 VAD VAG VAH VRH VAV
              • 311 Pressure regulator for gas VAD
              • 312 Airgas ratio control VAG
              • 313 Flow rate regulators VAH VRH
              • 314 Variable airgas ratio control VAV
              • 315 Pressure regulator with gas solenoid valve VAxS position indicator with visual indicator
                • 32 Animation
                • 33 Connection diagram
                  • 331 VAx with M20 cable gland
                  • 332 VAx with plug
                  • 333 VAS with VADVAGVAHVAV with M20 cable gland
                  • 334 VAS with VADVAGVAHVAV with plug
                      • 4 Replacement possibilities for MODULINE pressure regulators with gas solenoid valve
                        • 41 GVS GVI GVIB GVR and GVRH are to be replaced by VAD VAG VAG+VAS VAH and VAV
                          • 5 Flow rate
                            • 51 Selection example for VAD
                              • 511 Calculate VAD
                                • 52 Selection example for VAG VAH VRH VAV
                                  • 521 CalculateVAG VxHVAV
                                    • 53 Selection example for zero governor VAGN
                                      • 531 Calculate VAGN
                                          • 6 Selection
                                            • 61 Selection table for pressure regulator with solenoid valve VAD
                                            • 62 Type code for VAD
                                            • 63 Selection table for airgas ratio control with solenoid valve VAG flow rate regulators VAH VRH
                                            • 64 Type code for VAG VAH VRH
                                            • 65 Selection table for variable airgas ratio control with solenoid valve VAV
                                            • 66 Type code for VAV
                                            • 67 Accessories
                                              • 7 Project planning information
                                                • 71 Installation
                                                  • 711 Installation position
                                                    • 72 Setting the low-fire rate on VAG VAH VRH VAV
                                                    • 73 Setting the high-fire rate on VAV
                                                      • 731 Calculation
                                                          • 8 Accessories
                                                            • 81 Gas pressure switch DGVC for VAx VRH
                                                            • 82 Gas pressure switch DGVCT for VAxT VRHT
                                                            • 83 Bypass valvepilot gas valve VAS 1
                                                              • 831 VAS 1 attached to VADVAGVAHVAV 1
                                                              • 832 VAS 1 attached to VADVAGVAHVAV 2 VADVAGVAHVAV 3
                                                              • 833 Flow rate
                                                                • 84 Bypass valvepilot gas valve VBY 8 for VADVAGVAHVAV 1
                                                                  • 841 Scope of delivery VBY 8I as bypass valve
                                                                  • 842 Scope of delivery VBY 8R as pilot gas valve
                                                                  • 843 Selection
                                                                  • 844 Type code
                                                                  • 845 Flow rate
                                                                  • 846 Technical data
                                                                    • 85 Tightness control TC 116V
                                                                    • 86 Pressure test points
                                                                    • 87 Cable gland set
                                                                    • 88 Seal set VA 1thinspndashthinsp3
                                                                    • 89 Differential pressure orifice
                                                                    • 810 Retaining frame
                                                                    • 811 Attachment block
                                                                    • 812 Gas control line
                                                                    • 813 Measuring orifice VMO
                                                                    • 814 Filter module VMF
                                                                    • 815 Fine-adjusting valve VMV
                                                                      • 9 Technical data
                                                                        • 91 VAD
                                                                        • 92 VAG
                                                                        • 93 VAH VRH
                                                                        • 94 VAV
                                                                        • 95 Safety-specific characteristic values for VAx 1thinspndashthinsp3
                                                                          • 951 Determining the PFHD value the λD value and the MTTFd value
                                                                          • 952 Calculating the PFHD and PFDavg
                                                                            • 96 Dimensions
                                                                              • 10 Converting units
                                                                              • 11 Maintenance cycles
                                                                              • 12 Glossary
                                                                                • 121 Diagnostic coverage DC
                                                                                • 122 Mode of operation
                                                                                • 123 Category
                                                                                • 124 Common cause failure CCF
                                                                                • 125 Fraction of undetected common cause failures β
                                                                                • 126 B10d value
                                                                                • 127 T10d value
                                                                                • 128 Hardware fault tolerance HFT
                                                                                • 129 Mean dangerous failure rate λD
                                                                                • 1210 Safe failure fraction SFF
                                                                                • 1211 Probability of dangerous failure PFHD
                                                                                • 1212 Mean time to dangerous failure MTTFd
                                                                                • 1213 Demand rate nop
                                                                                • 1214 Average probability of dangerous failure on demand PFDavg
                                                                                  • Feedback
                                                                                  • Contact
                                                                                      1. naechste_Seite 24
                                                                                      2. naechste Seite 18
                                                                                      3. naechste Seite 6
                                                                                      4. naechste Seite 16
                                                                                      5. naechste Seite 14
                                                                                      6. naechste Seite 25
                                                                                      7. naechste_Seite 11
                                                                                      8. naechste_Seite 17
                                                                                      9. fbArbeitspunkt_Min Ja
                                                                                      10. fbArbeitspunkt Ja
                                                                                      11. ftProgramm Standard-Programm
                                                                                      12. fz_kv
                                                                                      13. fz_pe 80
                                                                                      14. fz_pG 60
                                                                                      15. fzDelta_p_Soll 20
                                                                                      16. ftEinheit_Druck mbar
                                                                                      17. fatTyp [115]
                                                                                      18. fbArbeitspunkt_Min_2 Ja
                                                                                      19. fbArbeitspunkt_2 Ja
                                                                                      20. ftRegler_Typ VAG
                                                                                      21. ftProgramm_2 Standard-Programm
                                                                                      22. fz_kv_2
                                                                                      23. fatMedium [08]
                                                                                      24. fzDichte 08
                                                                                      25. ftEinheit_Dichte kgm3
                                                                                      26. fzV_Norm 30
                                                                                      27. ftEinheit_Volstrom m3h
                                                                                      28. fz_pe_2 80
                                                                                      29. fz_pG_2 60
                                                                                      30. fzDelta_p_Soll_2 20
                                                                                      31. ftEinheit_Druck2 [mbar]
                                                                                      32. ftEinheit_Geschw [ms]
                                                                                      33. fatTyp_2 [10954451150103322]
                                                                                      34. fbArbeitspunkt_Min_3 Ja
                                                                                      35. fbArbeitspunkt_3 Ja
                                                                                      36. ftProgramm_3 Standard-Programm
                                                                                      37. fz_kv_3
                                                                                      38. fz_pe_3 20
                                                                                      39. fz_pG_3 0
                                                                                      40. fzDelta_p_Soll_3 20
                                                                                      41. fatTyp_3 [123]
                                                                                      42. fatSchaltleistung [6363683]
                                                                                      43. fz_nop_Stunde 1
                                                                                      44. fz_nop_Jahr 8760
                                                                                      45. fzZyklus 3600
                                                                                      46. fzB10d 6363683
                                                                                      47. fzT10d 10
                                                                                      48. fzPFHd_1V 15714170551864384e-8
                                                                                      49. fzPFDavg_1V
                                                                                      50. ftGeeignet_1V PL d SIL 2
                                                                                      51. fzPFHd_2V 33505832253532625e-10
                                                                                      52. fzPFDavg_2V
                                                                                      53. ftGeeignet_2V PL e SIL 3
                                                                                      54. ftUebersicht Off
                                                                                      55. ftVerstaendlichkeit Off
                                                                                      56. ftFehlende_Info
                                                                                      57. ftUmfang Off
                                                                                      58. ftVerwendung_1 Off
                                                                                      59. ftVerwendung_2 Off
                                                                                      60. ftVerwendung_3 Off
                                                                                      61. ftVerwendung_4 Off
                                                                                      62. ftNavigation Off
                                                                                      63. ftTaetigkeitsbereich Off
                                                                                      64. ftBemerkung
                                                                                      65. Michael Rehkamp Elster Kromschroumlder>btnSenden
Page 49: VAD, VAG, VAV, VAH, VRH, VCD, VCG, VCV, VCH · PDF fileVAD, VAG, VAH, VAV, VRH, VCD, VCG, VCV, VCH · Edition 04.15 6 VAD VAD VAS 1 .1 Examples of application 1 .1 .1 Constant pressure

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 49

9 5 Safety-specific characteristic values for VAx 1 ndash 3For SILSuitable for Safety Integrity Level SIL 1 2 3

Diagnostic coverage DC 0

Type of subsystem Type A to EN 61508-2 74312

Operating mode High demand mode pursu-ant to EN 61508-4 3512

For PLSuitable for Performance Level PL a b c d e

Category B 1 2 3 4Common cause failure CCF gt 65Application of essential safety requirements Satisfied

Application of tried-and-tested safety requirements Satisfied

For SIL and PL

B10d value

Operating cyclesVAD VAG VAV VAH 1 10094360VAD VAG VAV VAH 2 8229021VAD VAG VAV VAH 3 6363683

Hardware fault tolerance (1 valve) HFT 0

Hardware fault tolerance (2 valves) HFT 1

Safe failure fraction SFF gt 90Fraction of undetected com-mon cause failures β ge 2

Max service life under operating conditions10 years after date of production plus max 12 year in stor-age prior to first use or once the given number of operating cycles has been reached depending on which is achieved firstThe devices are suitable for single-channel systems (HFT = 0) up to SIL 2PL d and up to SIL 3PL e when two re-dundant valves are installed in a double-channel architecture (HFT = 1) provided that the complete system complies with the requirements of EN 61508ISO 13849

For a glossary of terms see page 53 (Glossary)

Technical data

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 50

nop 1hnop 1a

sB10d

T10d aPFHD (1 VAx) 1h

PFHD (2 VAx) 1h

PFDavg (1 VAx)

PFDavg (2 VAx)

Technical data gt Safety-specific characteristic values for VAx 1 ndash 3

9 5 1 Determining the PFHD value the λD value and the MTTFd value

PFHD = λD = x nop= 1MTTFd

01B10d

PFDavg = x λD x 24 x 365 x T10d 12

Type

Cycle time

suitable for

suitable for

PFHD = Probability of dangerous failure (HDM = high de-mand mode) [1hour]PFDavg = Average probability of dangerous failure on de-mand (LDM = low demand mode)λD = Mean dangerous failure rate [1hour]MTTFd = Mean time to dangerous failure [hours]nop = Demand rate (mean number of annual operations) [1hour]

9 5 2 Calculating the PFHD and PFDavg

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 51

VAD VAG VAH VAV

H1

Rp frac14(NPT frac14)

H2

E

LF

F

H4

H3

B

VAxS VAxF

L2G

G

Technical data

9 6 Dimensions

Type

Connec-tion Dimensions

WeightRpNPT DN

L L2 E F G H1 H2 H3 H4 Bmm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch kg lbs

VAx 115 12 15 75 29 ndash ndash 75 29 15 06 ndash ndash 143 56 82 32 161 63 117 46 97 38 18 40VAH 115 12 15 75 29 ndash ndash 75 29 15 06 ndash ndash 143 56 100 39 161 63 135 53 97 38 2 44VAx 120 34 20 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 82 33 161 63 117 46 97 38 19 42VAH 120 34 20 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 100 39 161 63 135 53 97 38 21 46VAx 125 1 25 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 82 33 161 63 117 46 97 38 19 42VAH 125 1 25 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 100 39 161 63 135 53 97 38 21 46VAx 240 112 40 128 50 200 79 85 33 29 11 66 26 170 67 112 44 191 75 162 64 125 49 44 97VAH 240 112 40 128 50 200 79 85 33 29 11 66 26 170 67 132 52 191 75 182 72 125 49 47 104VAx 350 2 50 155 61 230 91 85 33 36 14 74 29 180 70 135 53 201 79 196 77 160 63 61 134VAH 350 2 50 155 61 230 91 85 33 36 14 74 29 180 70 156 61 201 79 217 85 160 63 64 141

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 52

10 Converting unitssee wwwadlatusorg

11 Maintenance cyclesAt least once per annum at least twice per annum for biologi-cally produced methaneIf the flow rate drops clean the strainer

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 53

12 Glossary12 1 Diagnostic coverage DCMeasure of the effectiveness of diagnostics which may be determined as the ratio between the failure rate of detected dangerous failures and the failure rate of total dangerous failuresNOTE Diagnostic coverage can exist for the whole or parts of a safety-related system For example diagnostic cover-age could exist for sensors andor logic system andor final elements Unit see EN ISO 13849-12008

12 2 Mode of operationHigh demand mode or continuous modeOperating mode where the frequency of demands for opera-tion made on a safety-related system is greater than one per year or greater than twice the proof-test frequencysee EN 61508-42008

12 3 CategoryClassification of the safety-related parts of a control system in respect of their resistance to faults and their subsequent behaviour in the fault condition and which is achieved by the structural arrangement of the parts fault detection andor by their reliability see EN ISO 13849-12008

12 4 Common cause failure CCFFailures of different items resulting from a single event where these failures are not consequences of each othersee EN ISO 13849-12008

12 5 Fraction of undetected common cause failures β Fraction of undetected failures of redundant components due to a single event whereby these failures are not based on mutual causesNOTE β is expressed as a fraction in the equations and as a percentage elsewheresee EN 61508-62010

12 6 B10d valueMean number of cycles until 10 of the components fail dan-gerouslysee EN ISO 13849-12008

12 7 T10d valueMean time until 10 of the components fail dangerouslysee EN ISO 13849-12008

12 8 Hardware fault tolerance HFTA hardware fault tolerance of N means that N + 1 is the mini-mum number of faults that could cause a loss of the safety functionsee IEC 61508-22010

12 9 Mean dangerous failure rate λD Mean rate of dangerous failures during operation time (T10d) Unit 1hsee EN ISO 13849-12008

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 54

12 10 Safe failure fraction SFFFraction of safe failures related to all failures which are as-sumed to appearsee EN 13611A22011

12 11 Probability of dangerous failure PFHD Value describing the likelihood of dangerous failure per hour of a component for high demand mode or continuous mode Unit 1hsee EN 13611A22011

12 12 Mean time to dangerous failure MTTFd Expectation of the mean time to dangerous failuresee EN ISO 13849-12008

12 13 Demand rate nop Mean number of annual operationssee EN ISO 13849-12008

12 14 Average probability of dangerous failure on demand PFDavg (LDM = 1 ndash 10 switching cyclesyear)Average probability of a dangerous failure of the safety function on demand (LDM = low demand mode)see EN 61508-6

Glossary

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415

Finally we are offering you the opportunity to assess this ldquoTechnical Information (TI)rdquo and to give us your opinion so that we can improve our documents further and suit them to your needs

ClarityFound information quicklySearched for a long timeDidnrsquot find informationWhat is missing

ComprehensionCoherentToo complicatedNo answer

ScopeToo littleSufficientToo wideNo answer

No answer

NavigationI can find my way aroundI got ldquolostrdquoNo answer

UseTo get to know the productTo choose a productPlanningTo look for information

My scope of functionsTechnical departmentSalesNo answer

Remarks

(Adobe Reader 7 or higher required) wwwadobecom

Elster GmbH Postfach 2809 middot 49018 Osnabruumlck Strotheweg 1 middot 49504 Lotte (Buumlren) GermanyT +49 541 1214-0 F +49 541 1214-370 infokromschroedercomwwwkromschroedercom

The current addresses of our international agents are available on the Internetwwwkromschroederdeindexphpid=718ampL=1

We reserve the right to make technical modifications in the interests of progressCopyright copy 2015 Elster GmbH All rights reserved

Contact

Feedback

0325

0530

  • Pressure regulators with solenoid valve VAD VAG VAV VAH
  • Flow rate regulator VRH
  • Pressure regulators with double solenoid valve VCD VCG VCV VCH
  • Contents
  • 1 Application
    • 11 Examples of application
      • 111 Constant pressure control
      • 112 Constant pressure control with two gas solenoid valves
      • 113 Constant pressure control with max pressure switch
      • 114 Constant pressure control with non-controlled pilot gas outlet
      • 115 Modulating control
      • 116 Modulating control with two gas solenoid valves
      • 117 Modulating control with two gas solenoid valves and inlet pressure switch
      • 118 HighLow control
      • 119 Zero pressure control
      • 1110 Staged flow rate control
      • 1111 Continuous or staged flow rate control
      • 1112 Modulating control with variable airgas ratio control with gas solenoid valve
      • 1113 Modulating control in residential heat generation
          • 2 Certification
          • 3 Function
            • 31 VAD VAG VAH VRH VAV
              • 311 Pressure regulator for gas VAD
              • 312 Airgas ratio control VAG
              • 313 Flow rate regulators VAH VRH
              • 314 Variable airgas ratio control VAV
              • 315 Pressure regulator with gas solenoid valve VAxS position indicator with visual indicator
                • 32 Animation
                • 33 Connection diagram
                  • 331 VAx with M20 cable gland
                  • 332 VAx with plug
                  • 333 VAS with VADVAGVAHVAV with M20 cable gland
                  • 334 VAS with VADVAGVAHVAV with plug
                      • 4 Replacement possibilities for MODULINE pressure regulators with gas solenoid valve
                        • 41 GVS GVI GVIB GVR and GVRH are to be replaced by VAD VAG VAG+VAS VAH and VAV
                          • 5 Flow rate
                            • 51 Selection example for VAD
                              • 511 Calculate VAD
                                • 52 Selection example for VAG VAH VRH VAV
                                  • 521 CalculateVAG VxHVAV
                                    • 53 Selection example for zero governor VAGN
                                      • 531 Calculate VAGN
                                          • 6 Selection
                                            • 61 Selection table for pressure regulator with solenoid valve VAD
                                            • 62 Type code for VAD
                                            • 63 Selection table for airgas ratio control with solenoid valve VAG flow rate regulators VAH VRH
                                            • 64 Type code for VAG VAH VRH
                                            • 65 Selection table for variable airgas ratio control with solenoid valve VAV
                                            • 66 Type code for VAV
                                            • 67 Accessories
                                              • 7 Project planning information
                                                • 71 Installation
                                                  • 711 Installation position
                                                    • 72 Setting the low-fire rate on VAG VAH VRH VAV
                                                    • 73 Setting the high-fire rate on VAV
                                                      • 731 Calculation
                                                          • 8 Accessories
                                                            • 81 Gas pressure switch DGVC for VAx VRH
                                                            • 82 Gas pressure switch DGVCT for VAxT VRHT
                                                            • 83 Bypass valvepilot gas valve VAS 1
                                                              • 831 VAS 1 attached to VADVAGVAHVAV 1
                                                              • 832 VAS 1 attached to VADVAGVAHVAV 2 VADVAGVAHVAV 3
                                                              • 833 Flow rate
                                                                • 84 Bypass valvepilot gas valve VBY 8 for VADVAGVAHVAV 1
                                                                  • 841 Scope of delivery VBY 8I as bypass valve
                                                                  • 842 Scope of delivery VBY 8R as pilot gas valve
                                                                  • 843 Selection
                                                                  • 844 Type code
                                                                  • 845 Flow rate
                                                                  • 846 Technical data
                                                                    • 85 Tightness control TC 116V
                                                                    • 86 Pressure test points
                                                                    • 87 Cable gland set
                                                                    • 88 Seal set VA 1thinspndashthinsp3
                                                                    • 89 Differential pressure orifice
                                                                    • 810 Retaining frame
                                                                    • 811 Attachment block
                                                                    • 812 Gas control line
                                                                    • 813 Measuring orifice VMO
                                                                    • 814 Filter module VMF
                                                                    • 815 Fine-adjusting valve VMV
                                                                      • 9 Technical data
                                                                        • 91 VAD
                                                                        • 92 VAG
                                                                        • 93 VAH VRH
                                                                        • 94 VAV
                                                                        • 95 Safety-specific characteristic values for VAx 1thinspndashthinsp3
                                                                          • 951 Determining the PFHD value the λD value and the MTTFd value
                                                                          • 952 Calculating the PFHD and PFDavg
                                                                            • 96 Dimensions
                                                                              • 10 Converting units
                                                                              • 11 Maintenance cycles
                                                                              • 12 Glossary
                                                                                • 121 Diagnostic coverage DC
                                                                                • 122 Mode of operation
                                                                                • 123 Category
                                                                                • 124 Common cause failure CCF
                                                                                • 125 Fraction of undetected common cause failures β
                                                                                • 126 B10d value
                                                                                • 127 T10d value
                                                                                • 128 Hardware fault tolerance HFT
                                                                                • 129 Mean dangerous failure rate λD
                                                                                • 1210 Safe failure fraction SFF
                                                                                • 1211 Probability of dangerous failure PFHD
                                                                                • 1212 Mean time to dangerous failure MTTFd
                                                                                • 1213 Demand rate nop
                                                                                • 1214 Average probability of dangerous failure on demand PFDavg
                                                                                  • Feedback
                                                                                  • Contact
                                                                                      1. naechste_Seite 24
                                                                                      2. naechste Seite 18
                                                                                      3. naechste Seite 6
                                                                                      4. naechste Seite 16
                                                                                      5. naechste Seite 14
                                                                                      6. naechste Seite 25
                                                                                      7. naechste_Seite 11
                                                                                      8. naechste_Seite 17
                                                                                      9. fbArbeitspunkt_Min Ja
                                                                                      10. fbArbeitspunkt Ja
                                                                                      11. ftProgramm Standard-Programm
                                                                                      12. fz_kv
                                                                                      13. fz_pe 80
                                                                                      14. fz_pG 60
                                                                                      15. fzDelta_p_Soll 20
                                                                                      16. ftEinheit_Druck mbar
                                                                                      17. fatTyp [115]
                                                                                      18. fbArbeitspunkt_Min_2 Ja
                                                                                      19. fbArbeitspunkt_2 Ja
                                                                                      20. ftRegler_Typ VAG
                                                                                      21. ftProgramm_2 Standard-Programm
                                                                                      22. fz_kv_2
                                                                                      23. fatMedium [08]
                                                                                      24. fzDichte 08
                                                                                      25. ftEinheit_Dichte kgm3
                                                                                      26. fzV_Norm 30
                                                                                      27. ftEinheit_Volstrom m3h
                                                                                      28. fz_pe_2 80
                                                                                      29. fz_pG_2 60
                                                                                      30. fzDelta_p_Soll_2 20
                                                                                      31. ftEinheit_Druck2 [mbar]
                                                                                      32. ftEinheit_Geschw [ms]
                                                                                      33. fatTyp_2 [10954451150103322]
                                                                                      34. fbArbeitspunkt_Min_3 Ja
                                                                                      35. fbArbeitspunkt_3 Ja
                                                                                      36. ftProgramm_3 Standard-Programm
                                                                                      37. fz_kv_3
                                                                                      38. fz_pe_3 20
                                                                                      39. fz_pG_3 0
                                                                                      40. fzDelta_p_Soll_3 20
                                                                                      41. fatTyp_3 [123]
                                                                                      42. fatSchaltleistung [6363683]
                                                                                      43. fz_nop_Stunde 1
                                                                                      44. fz_nop_Jahr 8760
                                                                                      45. fzZyklus 3600
                                                                                      46. fzB10d 6363683
                                                                                      47. fzT10d 10
                                                                                      48. fzPFHd_1V 15714170551864384e-8
                                                                                      49. fzPFDavg_1V
                                                                                      50. ftGeeignet_1V PL d SIL 2
                                                                                      51. fzPFHd_2V 33505832253532625e-10
                                                                                      52. fzPFDavg_2V
                                                                                      53. ftGeeignet_2V PL e SIL 3
                                                                                      54. ftUebersicht Off
                                                                                      55. ftVerstaendlichkeit Off
                                                                                      56. ftFehlende_Info
                                                                                      57. ftUmfang Off
                                                                                      58. ftVerwendung_1 Off
                                                                                      59. ftVerwendung_2 Off
                                                                                      60. ftVerwendung_3 Off
                                                                                      61. ftVerwendung_4 Off
                                                                                      62. ftNavigation Off
                                                                                      63. ftTaetigkeitsbereich Off
                                                                                      64. ftBemerkung
                                                                                      65. Michael Rehkamp Elster Kromschroumlder>btnSenden
Page 50: VAD, VAG, VAV, VAH, VRH, VCD, VCG, VCV, VCH · PDF fileVAD, VAG, VAH, VAV, VRH, VCD, VCG, VCV, VCH · Edition 04.15 6 VAD VAD VAS 1 .1 Examples of application 1 .1 .1 Constant pressure

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 50

nop 1hnop 1a

sB10d

T10d aPFHD (1 VAx) 1h

PFHD (2 VAx) 1h

PFDavg (1 VAx)

PFDavg (2 VAx)

Technical data gt Safety-specific characteristic values for VAx 1 ndash 3

9 5 1 Determining the PFHD value the λD value and the MTTFd value

PFHD = λD = x nop= 1MTTFd

01B10d

PFDavg = x λD x 24 x 365 x T10d 12

Type

Cycle time

suitable for

suitable for

PFHD = Probability of dangerous failure (HDM = high de-mand mode) [1hour]PFDavg = Average probability of dangerous failure on de-mand (LDM = low demand mode)λD = Mean dangerous failure rate [1hour]MTTFd = Mean time to dangerous failure [hours]nop = Demand rate (mean number of annual operations) [1hour]

9 5 2 Calculating the PFHD and PFDavg

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 51

VAD VAG VAH VAV

H1

Rp frac14(NPT frac14)

H2

E

LF

F

H4

H3

B

VAxS VAxF

L2G

G

Technical data

9 6 Dimensions

Type

Connec-tion Dimensions

WeightRpNPT DN

L L2 E F G H1 H2 H3 H4 Bmm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch kg lbs

VAx 115 12 15 75 29 ndash ndash 75 29 15 06 ndash ndash 143 56 82 32 161 63 117 46 97 38 18 40VAH 115 12 15 75 29 ndash ndash 75 29 15 06 ndash ndash 143 56 100 39 161 63 135 53 97 38 2 44VAx 120 34 20 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 82 33 161 63 117 46 97 38 19 42VAH 120 34 20 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 100 39 161 63 135 53 97 38 21 46VAx 125 1 25 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 82 33 161 63 117 46 97 38 19 42VAH 125 1 25 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 100 39 161 63 135 53 97 38 21 46VAx 240 112 40 128 50 200 79 85 33 29 11 66 26 170 67 112 44 191 75 162 64 125 49 44 97VAH 240 112 40 128 50 200 79 85 33 29 11 66 26 170 67 132 52 191 75 182 72 125 49 47 104VAx 350 2 50 155 61 230 91 85 33 36 14 74 29 180 70 135 53 201 79 196 77 160 63 61 134VAH 350 2 50 155 61 230 91 85 33 36 14 74 29 180 70 156 61 201 79 217 85 160 63 64 141

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 52

10 Converting unitssee wwwadlatusorg

11 Maintenance cyclesAt least once per annum at least twice per annum for biologi-cally produced methaneIf the flow rate drops clean the strainer

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 53

12 Glossary12 1 Diagnostic coverage DCMeasure of the effectiveness of diagnostics which may be determined as the ratio between the failure rate of detected dangerous failures and the failure rate of total dangerous failuresNOTE Diagnostic coverage can exist for the whole or parts of a safety-related system For example diagnostic cover-age could exist for sensors andor logic system andor final elements Unit see EN ISO 13849-12008

12 2 Mode of operationHigh demand mode or continuous modeOperating mode where the frequency of demands for opera-tion made on a safety-related system is greater than one per year or greater than twice the proof-test frequencysee EN 61508-42008

12 3 CategoryClassification of the safety-related parts of a control system in respect of their resistance to faults and their subsequent behaviour in the fault condition and which is achieved by the structural arrangement of the parts fault detection andor by their reliability see EN ISO 13849-12008

12 4 Common cause failure CCFFailures of different items resulting from a single event where these failures are not consequences of each othersee EN ISO 13849-12008

12 5 Fraction of undetected common cause failures β Fraction of undetected failures of redundant components due to a single event whereby these failures are not based on mutual causesNOTE β is expressed as a fraction in the equations and as a percentage elsewheresee EN 61508-62010

12 6 B10d valueMean number of cycles until 10 of the components fail dan-gerouslysee EN ISO 13849-12008

12 7 T10d valueMean time until 10 of the components fail dangerouslysee EN ISO 13849-12008

12 8 Hardware fault tolerance HFTA hardware fault tolerance of N means that N + 1 is the mini-mum number of faults that could cause a loss of the safety functionsee IEC 61508-22010

12 9 Mean dangerous failure rate λD Mean rate of dangerous failures during operation time (T10d) Unit 1hsee EN ISO 13849-12008

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 54

12 10 Safe failure fraction SFFFraction of safe failures related to all failures which are as-sumed to appearsee EN 13611A22011

12 11 Probability of dangerous failure PFHD Value describing the likelihood of dangerous failure per hour of a component for high demand mode or continuous mode Unit 1hsee EN 13611A22011

12 12 Mean time to dangerous failure MTTFd Expectation of the mean time to dangerous failuresee EN ISO 13849-12008

12 13 Demand rate nop Mean number of annual operationssee EN ISO 13849-12008

12 14 Average probability of dangerous failure on demand PFDavg (LDM = 1 ndash 10 switching cyclesyear)Average probability of a dangerous failure of the safety function on demand (LDM = low demand mode)see EN 61508-6

Glossary

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415

Finally we are offering you the opportunity to assess this ldquoTechnical Information (TI)rdquo and to give us your opinion so that we can improve our documents further and suit them to your needs

ClarityFound information quicklySearched for a long timeDidnrsquot find informationWhat is missing

ComprehensionCoherentToo complicatedNo answer

ScopeToo littleSufficientToo wideNo answer

No answer

NavigationI can find my way aroundI got ldquolostrdquoNo answer

UseTo get to know the productTo choose a productPlanningTo look for information

My scope of functionsTechnical departmentSalesNo answer

Remarks

(Adobe Reader 7 or higher required) wwwadobecom

Elster GmbH Postfach 2809 middot 49018 Osnabruumlck Strotheweg 1 middot 49504 Lotte (Buumlren) GermanyT +49 541 1214-0 F +49 541 1214-370 infokromschroedercomwwwkromschroedercom

The current addresses of our international agents are available on the Internetwwwkromschroederdeindexphpid=718ampL=1

We reserve the right to make technical modifications in the interests of progressCopyright copy 2015 Elster GmbH All rights reserved

Contact

Feedback

0325

0530

  • Pressure regulators with solenoid valve VAD VAG VAV VAH
  • Flow rate regulator VRH
  • Pressure regulators with double solenoid valve VCD VCG VCV VCH
  • Contents
  • 1 Application
    • 11 Examples of application
      • 111 Constant pressure control
      • 112 Constant pressure control with two gas solenoid valves
      • 113 Constant pressure control with max pressure switch
      • 114 Constant pressure control with non-controlled pilot gas outlet
      • 115 Modulating control
      • 116 Modulating control with two gas solenoid valves
      • 117 Modulating control with two gas solenoid valves and inlet pressure switch
      • 118 HighLow control
      • 119 Zero pressure control
      • 1110 Staged flow rate control
      • 1111 Continuous or staged flow rate control
      • 1112 Modulating control with variable airgas ratio control with gas solenoid valve
      • 1113 Modulating control in residential heat generation
          • 2 Certification
          • 3 Function
            • 31 VAD VAG VAH VRH VAV
              • 311 Pressure regulator for gas VAD
              • 312 Airgas ratio control VAG
              • 313 Flow rate regulators VAH VRH
              • 314 Variable airgas ratio control VAV
              • 315 Pressure regulator with gas solenoid valve VAxS position indicator with visual indicator
                • 32 Animation
                • 33 Connection diagram
                  • 331 VAx with M20 cable gland
                  • 332 VAx with plug
                  • 333 VAS with VADVAGVAHVAV with M20 cable gland
                  • 334 VAS with VADVAGVAHVAV with plug
                      • 4 Replacement possibilities for MODULINE pressure regulators with gas solenoid valve
                        • 41 GVS GVI GVIB GVR and GVRH are to be replaced by VAD VAG VAG+VAS VAH and VAV
                          • 5 Flow rate
                            • 51 Selection example for VAD
                              • 511 Calculate VAD
                                • 52 Selection example for VAG VAH VRH VAV
                                  • 521 CalculateVAG VxHVAV
                                    • 53 Selection example for zero governor VAGN
                                      • 531 Calculate VAGN
                                          • 6 Selection
                                            • 61 Selection table for pressure regulator with solenoid valve VAD
                                            • 62 Type code for VAD
                                            • 63 Selection table for airgas ratio control with solenoid valve VAG flow rate regulators VAH VRH
                                            • 64 Type code for VAG VAH VRH
                                            • 65 Selection table for variable airgas ratio control with solenoid valve VAV
                                            • 66 Type code for VAV
                                            • 67 Accessories
                                              • 7 Project planning information
                                                • 71 Installation
                                                  • 711 Installation position
                                                    • 72 Setting the low-fire rate on VAG VAH VRH VAV
                                                    • 73 Setting the high-fire rate on VAV
                                                      • 731 Calculation
                                                          • 8 Accessories
                                                            • 81 Gas pressure switch DGVC for VAx VRH
                                                            • 82 Gas pressure switch DGVCT for VAxT VRHT
                                                            • 83 Bypass valvepilot gas valve VAS 1
                                                              • 831 VAS 1 attached to VADVAGVAHVAV 1
                                                              • 832 VAS 1 attached to VADVAGVAHVAV 2 VADVAGVAHVAV 3
                                                              • 833 Flow rate
                                                                • 84 Bypass valvepilot gas valve VBY 8 for VADVAGVAHVAV 1
                                                                  • 841 Scope of delivery VBY 8I as bypass valve
                                                                  • 842 Scope of delivery VBY 8R as pilot gas valve
                                                                  • 843 Selection
                                                                  • 844 Type code
                                                                  • 845 Flow rate
                                                                  • 846 Technical data
                                                                    • 85 Tightness control TC 116V
                                                                    • 86 Pressure test points
                                                                    • 87 Cable gland set
                                                                    • 88 Seal set VA 1thinspndashthinsp3
                                                                    • 89 Differential pressure orifice
                                                                    • 810 Retaining frame
                                                                    • 811 Attachment block
                                                                    • 812 Gas control line
                                                                    • 813 Measuring orifice VMO
                                                                    • 814 Filter module VMF
                                                                    • 815 Fine-adjusting valve VMV
                                                                      • 9 Technical data
                                                                        • 91 VAD
                                                                        • 92 VAG
                                                                        • 93 VAH VRH
                                                                        • 94 VAV
                                                                        • 95 Safety-specific characteristic values for VAx 1thinspndashthinsp3
                                                                          • 951 Determining the PFHD value the λD value and the MTTFd value
                                                                          • 952 Calculating the PFHD and PFDavg
                                                                            • 96 Dimensions
                                                                              • 10 Converting units
                                                                              • 11 Maintenance cycles
                                                                              • 12 Glossary
                                                                                • 121 Diagnostic coverage DC
                                                                                • 122 Mode of operation
                                                                                • 123 Category
                                                                                • 124 Common cause failure CCF
                                                                                • 125 Fraction of undetected common cause failures β
                                                                                • 126 B10d value
                                                                                • 127 T10d value
                                                                                • 128 Hardware fault tolerance HFT
                                                                                • 129 Mean dangerous failure rate λD
                                                                                • 1210 Safe failure fraction SFF
                                                                                • 1211 Probability of dangerous failure PFHD
                                                                                • 1212 Mean time to dangerous failure MTTFd
                                                                                • 1213 Demand rate nop
                                                                                • 1214 Average probability of dangerous failure on demand PFDavg
                                                                                  • Feedback
                                                                                  • Contact
                                                                                      1. naechste_Seite 24
                                                                                      2. naechste Seite 18
                                                                                      3. naechste Seite 6
                                                                                      4. naechste Seite 16
                                                                                      5. naechste Seite 14
                                                                                      6. naechste Seite 25
                                                                                      7. naechste_Seite 11
                                                                                      8. naechste_Seite 17
                                                                                      9. fbArbeitspunkt_Min Ja
                                                                                      10. fbArbeitspunkt Ja
                                                                                      11. ftProgramm Standard-Programm
                                                                                      12. fz_kv
                                                                                      13. fz_pe 80
                                                                                      14. fz_pG 60
                                                                                      15. fzDelta_p_Soll 20
                                                                                      16. ftEinheit_Druck mbar
                                                                                      17. fatTyp [115]
                                                                                      18. fbArbeitspunkt_Min_2 Ja
                                                                                      19. fbArbeitspunkt_2 Ja
                                                                                      20. ftRegler_Typ VAG
                                                                                      21. ftProgramm_2 Standard-Programm
                                                                                      22. fz_kv_2
                                                                                      23. fatMedium [08]
                                                                                      24. fzDichte 08
                                                                                      25. ftEinheit_Dichte kgm3
                                                                                      26. fzV_Norm 30
                                                                                      27. ftEinheit_Volstrom m3h
                                                                                      28. fz_pe_2 80
                                                                                      29. fz_pG_2 60
                                                                                      30. fzDelta_p_Soll_2 20
                                                                                      31. ftEinheit_Druck2 [mbar]
                                                                                      32. ftEinheit_Geschw [ms]
                                                                                      33. fatTyp_2 [10954451150103322]
                                                                                      34. fbArbeitspunkt_Min_3 Ja
                                                                                      35. fbArbeitspunkt_3 Ja
                                                                                      36. ftProgramm_3 Standard-Programm
                                                                                      37. fz_kv_3
                                                                                      38. fz_pe_3 20
                                                                                      39. fz_pG_3 0
                                                                                      40. fzDelta_p_Soll_3 20
                                                                                      41. fatTyp_3 [123]
                                                                                      42. fatSchaltleistung [6363683]
                                                                                      43. fz_nop_Stunde 1
                                                                                      44. fz_nop_Jahr 8760
                                                                                      45. fzZyklus 3600
                                                                                      46. fzB10d 6363683
                                                                                      47. fzT10d 10
                                                                                      48. fzPFHd_1V 15714170551864384e-8
                                                                                      49. fzPFDavg_1V
                                                                                      50. ftGeeignet_1V PL d SIL 2
                                                                                      51. fzPFHd_2V 33505832253532625e-10
                                                                                      52. fzPFDavg_2V
                                                                                      53. ftGeeignet_2V PL e SIL 3
                                                                                      54. ftUebersicht Off
                                                                                      55. ftVerstaendlichkeit Off
                                                                                      56. ftFehlende_Info
                                                                                      57. ftUmfang Off
                                                                                      58. ftVerwendung_1 Off
                                                                                      59. ftVerwendung_2 Off
                                                                                      60. ftVerwendung_3 Off
                                                                                      61. ftVerwendung_4 Off
                                                                                      62. ftNavigation Off
                                                                                      63. ftTaetigkeitsbereich Off
                                                                                      64. ftBemerkung
                                                                                      65. Michael Rehkamp Elster Kromschroumlder>btnSenden
Page 51: VAD, VAG, VAV, VAH, VRH, VCD, VCG, VCV, VCH · PDF fileVAD, VAG, VAH, VAV, VRH, VCD, VCG, VCV, VCH · Edition 04.15 6 VAD VAD VAS 1 .1 Examples of application 1 .1 .1 Constant pressure

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 51

VAD VAG VAH VAV

H1

Rp frac14(NPT frac14)

H2

E

LF

F

H4

H3

B

VAxS VAxF

L2G

G

Technical data

9 6 Dimensions

Type

Connec-tion Dimensions

WeightRpNPT DN

L L2 E F G H1 H2 H3 H4 Bmm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch kg lbs

VAx 115 12 15 75 29 ndash ndash 75 29 15 06 ndash ndash 143 56 82 32 161 63 117 46 97 38 18 40VAH 115 12 15 75 29 ndash ndash 75 29 15 06 ndash ndash 143 56 100 39 161 63 135 53 97 38 2 44VAx 120 34 20 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 82 33 161 63 117 46 97 38 19 42VAH 120 34 20 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 100 39 161 63 135 53 97 38 21 46VAx 125 1 25 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 82 33 161 63 117 46 97 38 19 42VAH 125 1 25 91 36 ndash ndash 75 29 23 09 ndash ndash 143 56 100 39 161 63 135 53 97 38 21 46VAx 240 112 40 128 50 200 79 85 33 29 11 66 26 170 67 112 44 191 75 162 64 125 49 44 97VAH 240 112 40 128 50 200 79 85 33 29 11 66 26 170 67 132 52 191 75 182 72 125 49 47 104VAx 350 2 50 155 61 230 91 85 33 36 14 74 29 180 70 135 53 201 79 196 77 160 63 61 134VAH 350 2 50 155 61 230 91 85 33 36 14 74 29 180 70 156 61 201 79 217 85 160 63 64 141

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 52

10 Converting unitssee wwwadlatusorg

11 Maintenance cyclesAt least once per annum at least twice per annum for biologi-cally produced methaneIf the flow rate drops clean the strainer

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 53

12 Glossary12 1 Diagnostic coverage DCMeasure of the effectiveness of diagnostics which may be determined as the ratio between the failure rate of detected dangerous failures and the failure rate of total dangerous failuresNOTE Diagnostic coverage can exist for the whole or parts of a safety-related system For example diagnostic cover-age could exist for sensors andor logic system andor final elements Unit see EN ISO 13849-12008

12 2 Mode of operationHigh demand mode or continuous modeOperating mode where the frequency of demands for opera-tion made on a safety-related system is greater than one per year or greater than twice the proof-test frequencysee EN 61508-42008

12 3 CategoryClassification of the safety-related parts of a control system in respect of their resistance to faults and their subsequent behaviour in the fault condition and which is achieved by the structural arrangement of the parts fault detection andor by their reliability see EN ISO 13849-12008

12 4 Common cause failure CCFFailures of different items resulting from a single event where these failures are not consequences of each othersee EN ISO 13849-12008

12 5 Fraction of undetected common cause failures β Fraction of undetected failures of redundant components due to a single event whereby these failures are not based on mutual causesNOTE β is expressed as a fraction in the equations and as a percentage elsewheresee EN 61508-62010

12 6 B10d valueMean number of cycles until 10 of the components fail dan-gerouslysee EN ISO 13849-12008

12 7 T10d valueMean time until 10 of the components fail dangerouslysee EN ISO 13849-12008

12 8 Hardware fault tolerance HFTA hardware fault tolerance of N means that N + 1 is the mini-mum number of faults that could cause a loss of the safety functionsee IEC 61508-22010

12 9 Mean dangerous failure rate λD Mean rate of dangerous failures during operation time (T10d) Unit 1hsee EN ISO 13849-12008

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 54

12 10 Safe failure fraction SFFFraction of safe failures related to all failures which are as-sumed to appearsee EN 13611A22011

12 11 Probability of dangerous failure PFHD Value describing the likelihood of dangerous failure per hour of a component for high demand mode or continuous mode Unit 1hsee EN 13611A22011

12 12 Mean time to dangerous failure MTTFd Expectation of the mean time to dangerous failuresee EN ISO 13849-12008

12 13 Demand rate nop Mean number of annual operationssee EN ISO 13849-12008

12 14 Average probability of dangerous failure on demand PFDavg (LDM = 1 ndash 10 switching cyclesyear)Average probability of a dangerous failure of the safety function on demand (LDM = low demand mode)see EN 61508-6

Glossary

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415

Finally we are offering you the opportunity to assess this ldquoTechnical Information (TI)rdquo and to give us your opinion so that we can improve our documents further and suit them to your needs

ClarityFound information quicklySearched for a long timeDidnrsquot find informationWhat is missing

ComprehensionCoherentToo complicatedNo answer

ScopeToo littleSufficientToo wideNo answer

No answer

NavigationI can find my way aroundI got ldquolostrdquoNo answer

UseTo get to know the productTo choose a productPlanningTo look for information

My scope of functionsTechnical departmentSalesNo answer

Remarks

(Adobe Reader 7 or higher required) wwwadobecom

Elster GmbH Postfach 2809 middot 49018 Osnabruumlck Strotheweg 1 middot 49504 Lotte (Buumlren) GermanyT +49 541 1214-0 F +49 541 1214-370 infokromschroedercomwwwkromschroedercom

The current addresses of our international agents are available on the Internetwwwkromschroederdeindexphpid=718ampL=1

We reserve the right to make technical modifications in the interests of progressCopyright copy 2015 Elster GmbH All rights reserved

Contact

Feedback

0325

0530

  • Pressure regulators with solenoid valve VAD VAG VAV VAH
  • Flow rate regulator VRH
  • Pressure regulators with double solenoid valve VCD VCG VCV VCH
  • Contents
  • 1 Application
    • 11 Examples of application
      • 111 Constant pressure control
      • 112 Constant pressure control with two gas solenoid valves
      • 113 Constant pressure control with max pressure switch
      • 114 Constant pressure control with non-controlled pilot gas outlet
      • 115 Modulating control
      • 116 Modulating control with two gas solenoid valves
      • 117 Modulating control with two gas solenoid valves and inlet pressure switch
      • 118 HighLow control
      • 119 Zero pressure control
      • 1110 Staged flow rate control
      • 1111 Continuous or staged flow rate control
      • 1112 Modulating control with variable airgas ratio control with gas solenoid valve
      • 1113 Modulating control in residential heat generation
          • 2 Certification
          • 3 Function
            • 31 VAD VAG VAH VRH VAV
              • 311 Pressure regulator for gas VAD
              • 312 Airgas ratio control VAG
              • 313 Flow rate regulators VAH VRH
              • 314 Variable airgas ratio control VAV
              • 315 Pressure regulator with gas solenoid valve VAxS position indicator with visual indicator
                • 32 Animation
                • 33 Connection diagram
                  • 331 VAx with M20 cable gland
                  • 332 VAx with plug
                  • 333 VAS with VADVAGVAHVAV with M20 cable gland
                  • 334 VAS with VADVAGVAHVAV with plug
                      • 4 Replacement possibilities for MODULINE pressure regulators with gas solenoid valve
                        • 41 GVS GVI GVIB GVR and GVRH are to be replaced by VAD VAG VAG+VAS VAH and VAV
                          • 5 Flow rate
                            • 51 Selection example for VAD
                              • 511 Calculate VAD
                                • 52 Selection example for VAG VAH VRH VAV
                                  • 521 CalculateVAG VxHVAV
                                    • 53 Selection example for zero governor VAGN
                                      • 531 Calculate VAGN
                                          • 6 Selection
                                            • 61 Selection table for pressure regulator with solenoid valve VAD
                                            • 62 Type code for VAD
                                            • 63 Selection table for airgas ratio control with solenoid valve VAG flow rate regulators VAH VRH
                                            • 64 Type code for VAG VAH VRH
                                            • 65 Selection table for variable airgas ratio control with solenoid valve VAV
                                            • 66 Type code for VAV
                                            • 67 Accessories
                                              • 7 Project planning information
                                                • 71 Installation
                                                  • 711 Installation position
                                                    • 72 Setting the low-fire rate on VAG VAH VRH VAV
                                                    • 73 Setting the high-fire rate on VAV
                                                      • 731 Calculation
                                                          • 8 Accessories
                                                            • 81 Gas pressure switch DGVC for VAx VRH
                                                            • 82 Gas pressure switch DGVCT for VAxT VRHT
                                                            • 83 Bypass valvepilot gas valve VAS 1
                                                              • 831 VAS 1 attached to VADVAGVAHVAV 1
                                                              • 832 VAS 1 attached to VADVAGVAHVAV 2 VADVAGVAHVAV 3
                                                              • 833 Flow rate
                                                                • 84 Bypass valvepilot gas valve VBY 8 for VADVAGVAHVAV 1
                                                                  • 841 Scope of delivery VBY 8I as bypass valve
                                                                  • 842 Scope of delivery VBY 8R as pilot gas valve
                                                                  • 843 Selection
                                                                  • 844 Type code
                                                                  • 845 Flow rate
                                                                  • 846 Technical data
                                                                    • 85 Tightness control TC 116V
                                                                    • 86 Pressure test points
                                                                    • 87 Cable gland set
                                                                    • 88 Seal set VA 1thinspndashthinsp3
                                                                    • 89 Differential pressure orifice
                                                                    • 810 Retaining frame
                                                                    • 811 Attachment block
                                                                    • 812 Gas control line
                                                                    • 813 Measuring orifice VMO
                                                                    • 814 Filter module VMF
                                                                    • 815 Fine-adjusting valve VMV
                                                                      • 9 Technical data
                                                                        • 91 VAD
                                                                        • 92 VAG
                                                                        • 93 VAH VRH
                                                                        • 94 VAV
                                                                        • 95 Safety-specific characteristic values for VAx 1thinspndashthinsp3
                                                                          • 951 Determining the PFHD value the λD value and the MTTFd value
                                                                          • 952 Calculating the PFHD and PFDavg
                                                                            • 96 Dimensions
                                                                              • 10 Converting units
                                                                              • 11 Maintenance cycles
                                                                              • 12 Glossary
                                                                                • 121 Diagnostic coverage DC
                                                                                • 122 Mode of operation
                                                                                • 123 Category
                                                                                • 124 Common cause failure CCF
                                                                                • 125 Fraction of undetected common cause failures β
                                                                                • 126 B10d value
                                                                                • 127 T10d value
                                                                                • 128 Hardware fault tolerance HFT
                                                                                • 129 Mean dangerous failure rate λD
                                                                                • 1210 Safe failure fraction SFF
                                                                                • 1211 Probability of dangerous failure PFHD
                                                                                • 1212 Mean time to dangerous failure MTTFd
                                                                                • 1213 Demand rate nop
                                                                                • 1214 Average probability of dangerous failure on demand PFDavg
                                                                                  • Feedback
                                                                                  • Contact
                                                                                      1. naechste_Seite 24
                                                                                      2. naechste Seite 18
                                                                                      3. naechste Seite 6
                                                                                      4. naechste Seite 16
                                                                                      5. naechste Seite 14
                                                                                      6. naechste Seite 25
                                                                                      7. naechste_Seite 11
                                                                                      8. naechste_Seite 17
                                                                                      9. fbArbeitspunkt_Min Ja
                                                                                      10. fbArbeitspunkt Ja
                                                                                      11. ftProgramm Standard-Programm
                                                                                      12. fz_kv
                                                                                      13. fz_pe 80
                                                                                      14. fz_pG 60
                                                                                      15. fzDelta_p_Soll 20
                                                                                      16. ftEinheit_Druck mbar
                                                                                      17. fatTyp [115]
                                                                                      18. fbArbeitspunkt_Min_2 Ja
                                                                                      19. fbArbeitspunkt_2 Ja
                                                                                      20. ftRegler_Typ VAG
                                                                                      21. ftProgramm_2 Standard-Programm
                                                                                      22. fz_kv_2
                                                                                      23. fatMedium [08]
                                                                                      24. fzDichte 08
                                                                                      25. ftEinheit_Dichte kgm3
                                                                                      26. fzV_Norm 30
                                                                                      27. ftEinheit_Volstrom m3h
                                                                                      28. fz_pe_2 80
                                                                                      29. fz_pG_2 60
                                                                                      30. fzDelta_p_Soll_2 20
                                                                                      31. ftEinheit_Druck2 [mbar]
                                                                                      32. ftEinheit_Geschw [ms]
                                                                                      33. fatTyp_2 [10954451150103322]
                                                                                      34. fbArbeitspunkt_Min_3 Ja
                                                                                      35. fbArbeitspunkt_3 Ja
                                                                                      36. ftProgramm_3 Standard-Programm
                                                                                      37. fz_kv_3
                                                                                      38. fz_pe_3 20
                                                                                      39. fz_pG_3 0
                                                                                      40. fzDelta_p_Soll_3 20
                                                                                      41. fatTyp_3 [123]
                                                                                      42. fatSchaltleistung [6363683]
                                                                                      43. fz_nop_Stunde 1
                                                                                      44. fz_nop_Jahr 8760
                                                                                      45. fzZyklus 3600
                                                                                      46. fzB10d 6363683
                                                                                      47. fzT10d 10
                                                                                      48. fzPFHd_1V 15714170551864384e-8
                                                                                      49. fzPFDavg_1V
                                                                                      50. ftGeeignet_1V PL d SIL 2
                                                                                      51. fzPFHd_2V 33505832253532625e-10
                                                                                      52. fzPFDavg_2V
                                                                                      53. ftGeeignet_2V PL e SIL 3
                                                                                      54. ftUebersicht Off
                                                                                      55. ftVerstaendlichkeit Off
                                                                                      56. ftFehlende_Info
                                                                                      57. ftUmfang Off
                                                                                      58. ftVerwendung_1 Off
                                                                                      59. ftVerwendung_2 Off
                                                                                      60. ftVerwendung_3 Off
                                                                                      61. ftVerwendung_4 Off
                                                                                      62. ftNavigation Off
                                                                                      63. ftTaetigkeitsbereich Off
                                                                                      64. ftBemerkung
                                                                                      65. Michael Rehkamp Elster Kromschroumlder>btnSenden
Page 52: VAD, VAG, VAV, VAH, VRH, VCD, VCG, VCV, VCH · PDF fileVAD, VAG, VAH, VAV, VRH, VCD, VCG, VCV, VCH · Edition 04.15 6 VAD VAD VAS 1 .1 Examples of application 1 .1 .1 Constant pressure

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 52

10 Converting unitssee wwwadlatusorg

11 Maintenance cyclesAt least once per annum at least twice per annum for biologi-cally produced methaneIf the flow rate drops clean the strainer

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 53

12 Glossary12 1 Diagnostic coverage DCMeasure of the effectiveness of diagnostics which may be determined as the ratio between the failure rate of detected dangerous failures and the failure rate of total dangerous failuresNOTE Diagnostic coverage can exist for the whole or parts of a safety-related system For example diagnostic cover-age could exist for sensors andor logic system andor final elements Unit see EN ISO 13849-12008

12 2 Mode of operationHigh demand mode or continuous modeOperating mode where the frequency of demands for opera-tion made on a safety-related system is greater than one per year or greater than twice the proof-test frequencysee EN 61508-42008

12 3 CategoryClassification of the safety-related parts of a control system in respect of their resistance to faults and their subsequent behaviour in the fault condition and which is achieved by the structural arrangement of the parts fault detection andor by their reliability see EN ISO 13849-12008

12 4 Common cause failure CCFFailures of different items resulting from a single event where these failures are not consequences of each othersee EN ISO 13849-12008

12 5 Fraction of undetected common cause failures β Fraction of undetected failures of redundant components due to a single event whereby these failures are not based on mutual causesNOTE β is expressed as a fraction in the equations and as a percentage elsewheresee EN 61508-62010

12 6 B10d valueMean number of cycles until 10 of the components fail dan-gerouslysee EN ISO 13849-12008

12 7 T10d valueMean time until 10 of the components fail dangerouslysee EN ISO 13849-12008

12 8 Hardware fault tolerance HFTA hardware fault tolerance of N means that N + 1 is the mini-mum number of faults that could cause a loss of the safety functionsee IEC 61508-22010

12 9 Mean dangerous failure rate λD Mean rate of dangerous failures during operation time (T10d) Unit 1hsee EN ISO 13849-12008

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 54

12 10 Safe failure fraction SFFFraction of safe failures related to all failures which are as-sumed to appearsee EN 13611A22011

12 11 Probability of dangerous failure PFHD Value describing the likelihood of dangerous failure per hour of a component for high demand mode or continuous mode Unit 1hsee EN 13611A22011

12 12 Mean time to dangerous failure MTTFd Expectation of the mean time to dangerous failuresee EN ISO 13849-12008

12 13 Demand rate nop Mean number of annual operationssee EN ISO 13849-12008

12 14 Average probability of dangerous failure on demand PFDavg (LDM = 1 ndash 10 switching cyclesyear)Average probability of a dangerous failure of the safety function on demand (LDM = low demand mode)see EN 61508-6

Glossary

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415

Finally we are offering you the opportunity to assess this ldquoTechnical Information (TI)rdquo and to give us your opinion so that we can improve our documents further and suit them to your needs

ClarityFound information quicklySearched for a long timeDidnrsquot find informationWhat is missing

ComprehensionCoherentToo complicatedNo answer

ScopeToo littleSufficientToo wideNo answer

No answer

NavigationI can find my way aroundI got ldquolostrdquoNo answer

UseTo get to know the productTo choose a productPlanningTo look for information

My scope of functionsTechnical departmentSalesNo answer

Remarks

(Adobe Reader 7 or higher required) wwwadobecom

Elster GmbH Postfach 2809 middot 49018 Osnabruumlck Strotheweg 1 middot 49504 Lotte (Buumlren) GermanyT +49 541 1214-0 F +49 541 1214-370 infokromschroedercomwwwkromschroedercom

The current addresses of our international agents are available on the Internetwwwkromschroederdeindexphpid=718ampL=1

We reserve the right to make technical modifications in the interests of progressCopyright copy 2015 Elster GmbH All rights reserved

Contact

Feedback

0325

0530

  • Pressure regulators with solenoid valve VAD VAG VAV VAH
  • Flow rate regulator VRH
  • Pressure regulators with double solenoid valve VCD VCG VCV VCH
  • Contents
  • 1 Application
    • 11 Examples of application
      • 111 Constant pressure control
      • 112 Constant pressure control with two gas solenoid valves
      • 113 Constant pressure control with max pressure switch
      • 114 Constant pressure control with non-controlled pilot gas outlet
      • 115 Modulating control
      • 116 Modulating control with two gas solenoid valves
      • 117 Modulating control with two gas solenoid valves and inlet pressure switch
      • 118 HighLow control
      • 119 Zero pressure control
      • 1110 Staged flow rate control
      • 1111 Continuous or staged flow rate control
      • 1112 Modulating control with variable airgas ratio control with gas solenoid valve
      • 1113 Modulating control in residential heat generation
          • 2 Certification
          • 3 Function
            • 31 VAD VAG VAH VRH VAV
              • 311 Pressure regulator for gas VAD
              • 312 Airgas ratio control VAG
              • 313 Flow rate regulators VAH VRH
              • 314 Variable airgas ratio control VAV
              • 315 Pressure regulator with gas solenoid valve VAxS position indicator with visual indicator
                • 32 Animation
                • 33 Connection diagram
                  • 331 VAx with M20 cable gland
                  • 332 VAx with plug
                  • 333 VAS with VADVAGVAHVAV with M20 cable gland
                  • 334 VAS with VADVAGVAHVAV with plug
                      • 4 Replacement possibilities for MODULINE pressure regulators with gas solenoid valve
                        • 41 GVS GVI GVIB GVR and GVRH are to be replaced by VAD VAG VAG+VAS VAH and VAV
                          • 5 Flow rate
                            • 51 Selection example for VAD
                              • 511 Calculate VAD
                                • 52 Selection example for VAG VAH VRH VAV
                                  • 521 CalculateVAG VxHVAV
                                    • 53 Selection example for zero governor VAGN
                                      • 531 Calculate VAGN
                                          • 6 Selection
                                            • 61 Selection table for pressure regulator with solenoid valve VAD
                                            • 62 Type code for VAD
                                            • 63 Selection table for airgas ratio control with solenoid valve VAG flow rate regulators VAH VRH
                                            • 64 Type code for VAG VAH VRH
                                            • 65 Selection table for variable airgas ratio control with solenoid valve VAV
                                            • 66 Type code for VAV
                                            • 67 Accessories
                                              • 7 Project planning information
                                                • 71 Installation
                                                  • 711 Installation position
                                                    • 72 Setting the low-fire rate on VAG VAH VRH VAV
                                                    • 73 Setting the high-fire rate on VAV
                                                      • 731 Calculation
                                                          • 8 Accessories
                                                            • 81 Gas pressure switch DGVC for VAx VRH
                                                            • 82 Gas pressure switch DGVCT for VAxT VRHT
                                                            • 83 Bypass valvepilot gas valve VAS 1
                                                              • 831 VAS 1 attached to VADVAGVAHVAV 1
                                                              • 832 VAS 1 attached to VADVAGVAHVAV 2 VADVAGVAHVAV 3
                                                              • 833 Flow rate
                                                                • 84 Bypass valvepilot gas valve VBY 8 for VADVAGVAHVAV 1
                                                                  • 841 Scope of delivery VBY 8I as bypass valve
                                                                  • 842 Scope of delivery VBY 8R as pilot gas valve
                                                                  • 843 Selection
                                                                  • 844 Type code
                                                                  • 845 Flow rate
                                                                  • 846 Technical data
                                                                    • 85 Tightness control TC 116V
                                                                    • 86 Pressure test points
                                                                    • 87 Cable gland set
                                                                    • 88 Seal set VA 1thinspndashthinsp3
                                                                    • 89 Differential pressure orifice
                                                                    • 810 Retaining frame
                                                                    • 811 Attachment block
                                                                    • 812 Gas control line
                                                                    • 813 Measuring orifice VMO
                                                                    • 814 Filter module VMF
                                                                    • 815 Fine-adjusting valve VMV
                                                                      • 9 Technical data
                                                                        • 91 VAD
                                                                        • 92 VAG
                                                                        • 93 VAH VRH
                                                                        • 94 VAV
                                                                        • 95 Safety-specific characteristic values for VAx 1thinspndashthinsp3
                                                                          • 951 Determining the PFHD value the λD value and the MTTFd value
                                                                          • 952 Calculating the PFHD and PFDavg
                                                                            • 96 Dimensions
                                                                              • 10 Converting units
                                                                              • 11 Maintenance cycles
                                                                              • 12 Glossary
                                                                                • 121 Diagnostic coverage DC
                                                                                • 122 Mode of operation
                                                                                • 123 Category
                                                                                • 124 Common cause failure CCF
                                                                                • 125 Fraction of undetected common cause failures β
                                                                                • 126 B10d value
                                                                                • 127 T10d value
                                                                                • 128 Hardware fault tolerance HFT
                                                                                • 129 Mean dangerous failure rate λD
                                                                                • 1210 Safe failure fraction SFF
                                                                                • 1211 Probability of dangerous failure PFHD
                                                                                • 1212 Mean time to dangerous failure MTTFd
                                                                                • 1213 Demand rate nop
                                                                                • 1214 Average probability of dangerous failure on demand PFDavg
                                                                                  • Feedback
                                                                                  • Contact
                                                                                      1. naechste_Seite 24
                                                                                      2. naechste Seite 18
                                                                                      3. naechste Seite 6
                                                                                      4. naechste Seite 16
                                                                                      5. naechste Seite 14
                                                                                      6. naechste Seite 25
                                                                                      7. naechste_Seite 11
                                                                                      8. naechste_Seite 17
                                                                                      9. fbArbeitspunkt_Min Ja
                                                                                      10. fbArbeitspunkt Ja
                                                                                      11. ftProgramm Standard-Programm
                                                                                      12. fz_kv
                                                                                      13. fz_pe 80
                                                                                      14. fz_pG 60
                                                                                      15. fzDelta_p_Soll 20
                                                                                      16. ftEinheit_Druck mbar
                                                                                      17. fatTyp [115]
                                                                                      18. fbArbeitspunkt_Min_2 Ja
                                                                                      19. fbArbeitspunkt_2 Ja
                                                                                      20. ftRegler_Typ VAG
                                                                                      21. ftProgramm_2 Standard-Programm
                                                                                      22. fz_kv_2
                                                                                      23. fatMedium [08]
                                                                                      24. fzDichte 08
                                                                                      25. ftEinheit_Dichte kgm3
                                                                                      26. fzV_Norm 30
                                                                                      27. ftEinheit_Volstrom m3h
                                                                                      28. fz_pe_2 80
                                                                                      29. fz_pG_2 60
                                                                                      30. fzDelta_p_Soll_2 20
                                                                                      31. ftEinheit_Druck2 [mbar]
                                                                                      32. ftEinheit_Geschw [ms]
                                                                                      33. fatTyp_2 [10954451150103322]
                                                                                      34. fbArbeitspunkt_Min_3 Ja
                                                                                      35. fbArbeitspunkt_3 Ja
                                                                                      36. ftProgramm_3 Standard-Programm
                                                                                      37. fz_kv_3
                                                                                      38. fz_pe_3 20
                                                                                      39. fz_pG_3 0
                                                                                      40. fzDelta_p_Soll_3 20
                                                                                      41. fatTyp_3 [123]
                                                                                      42. fatSchaltleistung [6363683]
                                                                                      43. fz_nop_Stunde 1
                                                                                      44. fz_nop_Jahr 8760
                                                                                      45. fzZyklus 3600
                                                                                      46. fzB10d 6363683
                                                                                      47. fzT10d 10
                                                                                      48. fzPFHd_1V 15714170551864384e-8
                                                                                      49. fzPFDavg_1V
                                                                                      50. ftGeeignet_1V PL d SIL 2
                                                                                      51. fzPFHd_2V 33505832253532625e-10
                                                                                      52. fzPFDavg_2V
                                                                                      53. ftGeeignet_2V PL e SIL 3
                                                                                      54. ftUebersicht Off
                                                                                      55. ftVerstaendlichkeit Off
                                                                                      56. ftFehlende_Info
                                                                                      57. ftUmfang Off
                                                                                      58. ftVerwendung_1 Off
                                                                                      59. ftVerwendung_2 Off
                                                                                      60. ftVerwendung_3 Off
                                                                                      61. ftVerwendung_4 Off
                                                                                      62. ftNavigation Off
                                                                                      63. ftTaetigkeitsbereich Off
                                                                                      64. ftBemerkung
                                                                                      65. Michael Rehkamp Elster Kromschroumlder>btnSenden
Page 53: VAD, VAG, VAV, VAH, VRH, VCD, VCG, VCV, VCH · PDF fileVAD, VAG, VAH, VAV, VRH, VCD, VCG, VCV, VCH · Edition 04.15 6 VAD VAD VAS 1 .1 Examples of application 1 .1 .1 Constant pressure

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 53

12 Glossary12 1 Diagnostic coverage DCMeasure of the effectiveness of diagnostics which may be determined as the ratio between the failure rate of detected dangerous failures and the failure rate of total dangerous failuresNOTE Diagnostic coverage can exist for the whole or parts of a safety-related system For example diagnostic cover-age could exist for sensors andor logic system andor final elements Unit see EN ISO 13849-12008

12 2 Mode of operationHigh demand mode or continuous modeOperating mode where the frequency of demands for opera-tion made on a safety-related system is greater than one per year or greater than twice the proof-test frequencysee EN 61508-42008

12 3 CategoryClassification of the safety-related parts of a control system in respect of their resistance to faults and their subsequent behaviour in the fault condition and which is achieved by the structural arrangement of the parts fault detection andor by their reliability see EN ISO 13849-12008

12 4 Common cause failure CCFFailures of different items resulting from a single event where these failures are not consequences of each othersee EN ISO 13849-12008

12 5 Fraction of undetected common cause failures β Fraction of undetected failures of redundant components due to a single event whereby these failures are not based on mutual causesNOTE β is expressed as a fraction in the equations and as a percentage elsewheresee EN 61508-62010

12 6 B10d valueMean number of cycles until 10 of the components fail dan-gerouslysee EN ISO 13849-12008

12 7 T10d valueMean time until 10 of the components fail dangerouslysee EN ISO 13849-12008

12 8 Hardware fault tolerance HFTA hardware fault tolerance of N means that N + 1 is the mini-mum number of faults that could cause a loss of the safety functionsee IEC 61508-22010

12 9 Mean dangerous failure rate λD Mean rate of dangerous failures during operation time (T10d) Unit 1hsee EN ISO 13849-12008

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 54

12 10 Safe failure fraction SFFFraction of safe failures related to all failures which are as-sumed to appearsee EN 13611A22011

12 11 Probability of dangerous failure PFHD Value describing the likelihood of dangerous failure per hour of a component for high demand mode or continuous mode Unit 1hsee EN 13611A22011

12 12 Mean time to dangerous failure MTTFd Expectation of the mean time to dangerous failuresee EN ISO 13849-12008

12 13 Demand rate nop Mean number of annual operationssee EN ISO 13849-12008

12 14 Average probability of dangerous failure on demand PFDavg (LDM = 1 ndash 10 switching cyclesyear)Average probability of a dangerous failure of the safety function on demand (LDM = low demand mode)see EN 61508-6

Glossary

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415

Finally we are offering you the opportunity to assess this ldquoTechnical Information (TI)rdquo and to give us your opinion so that we can improve our documents further and suit them to your needs

ClarityFound information quicklySearched for a long timeDidnrsquot find informationWhat is missing

ComprehensionCoherentToo complicatedNo answer

ScopeToo littleSufficientToo wideNo answer

No answer

NavigationI can find my way aroundI got ldquolostrdquoNo answer

UseTo get to know the productTo choose a productPlanningTo look for information

My scope of functionsTechnical departmentSalesNo answer

Remarks

(Adobe Reader 7 or higher required) wwwadobecom

Elster GmbH Postfach 2809 middot 49018 Osnabruumlck Strotheweg 1 middot 49504 Lotte (Buumlren) GermanyT +49 541 1214-0 F +49 541 1214-370 infokromschroedercomwwwkromschroedercom

The current addresses of our international agents are available on the Internetwwwkromschroederdeindexphpid=718ampL=1

We reserve the right to make technical modifications in the interests of progressCopyright copy 2015 Elster GmbH All rights reserved

Contact

Feedback

0325

0530

  • Pressure regulators with solenoid valve VAD VAG VAV VAH
  • Flow rate regulator VRH
  • Pressure regulators with double solenoid valve VCD VCG VCV VCH
  • Contents
  • 1 Application
    • 11 Examples of application
      • 111 Constant pressure control
      • 112 Constant pressure control with two gas solenoid valves
      • 113 Constant pressure control with max pressure switch
      • 114 Constant pressure control with non-controlled pilot gas outlet
      • 115 Modulating control
      • 116 Modulating control with two gas solenoid valves
      • 117 Modulating control with two gas solenoid valves and inlet pressure switch
      • 118 HighLow control
      • 119 Zero pressure control
      • 1110 Staged flow rate control
      • 1111 Continuous or staged flow rate control
      • 1112 Modulating control with variable airgas ratio control with gas solenoid valve
      • 1113 Modulating control in residential heat generation
          • 2 Certification
          • 3 Function
            • 31 VAD VAG VAH VRH VAV
              • 311 Pressure regulator for gas VAD
              • 312 Airgas ratio control VAG
              • 313 Flow rate regulators VAH VRH
              • 314 Variable airgas ratio control VAV
              • 315 Pressure regulator with gas solenoid valve VAxS position indicator with visual indicator
                • 32 Animation
                • 33 Connection diagram
                  • 331 VAx with M20 cable gland
                  • 332 VAx with plug
                  • 333 VAS with VADVAGVAHVAV with M20 cable gland
                  • 334 VAS with VADVAGVAHVAV with plug
                      • 4 Replacement possibilities for MODULINE pressure regulators with gas solenoid valve
                        • 41 GVS GVI GVIB GVR and GVRH are to be replaced by VAD VAG VAG+VAS VAH and VAV
                          • 5 Flow rate
                            • 51 Selection example for VAD
                              • 511 Calculate VAD
                                • 52 Selection example for VAG VAH VRH VAV
                                  • 521 CalculateVAG VxHVAV
                                    • 53 Selection example for zero governor VAGN
                                      • 531 Calculate VAGN
                                          • 6 Selection
                                            • 61 Selection table for pressure regulator with solenoid valve VAD
                                            • 62 Type code for VAD
                                            • 63 Selection table for airgas ratio control with solenoid valve VAG flow rate regulators VAH VRH
                                            • 64 Type code for VAG VAH VRH
                                            • 65 Selection table for variable airgas ratio control with solenoid valve VAV
                                            • 66 Type code for VAV
                                            • 67 Accessories
                                              • 7 Project planning information
                                                • 71 Installation
                                                  • 711 Installation position
                                                    • 72 Setting the low-fire rate on VAG VAH VRH VAV
                                                    • 73 Setting the high-fire rate on VAV
                                                      • 731 Calculation
                                                          • 8 Accessories
                                                            • 81 Gas pressure switch DGVC for VAx VRH
                                                            • 82 Gas pressure switch DGVCT for VAxT VRHT
                                                            • 83 Bypass valvepilot gas valve VAS 1
                                                              • 831 VAS 1 attached to VADVAGVAHVAV 1
                                                              • 832 VAS 1 attached to VADVAGVAHVAV 2 VADVAGVAHVAV 3
                                                              • 833 Flow rate
                                                                • 84 Bypass valvepilot gas valve VBY 8 for VADVAGVAHVAV 1
                                                                  • 841 Scope of delivery VBY 8I as bypass valve
                                                                  • 842 Scope of delivery VBY 8R as pilot gas valve
                                                                  • 843 Selection
                                                                  • 844 Type code
                                                                  • 845 Flow rate
                                                                  • 846 Technical data
                                                                    • 85 Tightness control TC 116V
                                                                    • 86 Pressure test points
                                                                    • 87 Cable gland set
                                                                    • 88 Seal set VA 1thinspndashthinsp3
                                                                    • 89 Differential pressure orifice
                                                                    • 810 Retaining frame
                                                                    • 811 Attachment block
                                                                    • 812 Gas control line
                                                                    • 813 Measuring orifice VMO
                                                                    • 814 Filter module VMF
                                                                    • 815 Fine-adjusting valve VMV
                                                                      • 9 Technical data
                                                                        • 91 VAD
                                                                        • 92 VAG
                                                                        • 93 VAH VRH
                                                                        • 94 VAV
                                                                        • 95 Safety-specific characteristic values for VAx 1thinspndashthinsp3
                                                                          • 951 Determining the PFHD value the λD value and the MTTFd value
                                                                          • 952 Calculating the PFHD and PFDavg
                                                                            • 96 Dimensions
                                                                              • 10 Converting units
                                                                              • 11 Maintenance cycles
                                                                              • 12 Glossary
                                                                                • 121 Diagnostic coverage DC
                                                                                • 122 Mode of operation
                                                                                • 123 Category
                                                                                • 124 Common cause failure CCF
                                                                                • 125 Fraction of undetected common cause failures β
                                                                                • 126 B10d value
                                                                                • 127 T10d value
                                                                                • 128 Hardware fault tolerance HFT
                                                                                • 129 Mean dangerous failure rate λD
                                                                                • 1210 Safe failure fraction SFF
                                                                                • 1211 Probability of dangerous failure PFHD
                                                                                • 1212 Mean time to dangerous failure MTTFd
                                                                                • 1213 Demand rate nop
                                                                                • 1214 Average probability of dangerous failure on demand PFDavg
                                                                                  • Feedback
                                                                                  • Contact
                                                                                      1. naechste_Seite 24
                                                                                      2. naechste Seite 18
                                                                                      3. naechste Seite 6
                                                                                      4. naechste Seite 16
                                                                                      5. naechste Seite 14
                                                                                      6. naechste Seite 25
                                                                                      7. naechste_Seite 11
                                                                                      8. naechste_Seite 17
                                                                                      9. fbArbeitspunkt_Min Ja
                                                                                      10. fbArbeitspunkt Ja
                                                                                      11. ftProgramm Standard-Programm
                                                                                      12. fz_kv
                                                                                      13. fz_pe 80
                                                                                      14. fz_pG 60
                                                                                      15. fzDelta_p_Soll 20
                                                                                      16. ftEinheit_Druck mbar
                                                                                      17. fatTyp [115]
                                                                                      18. fbArbeitspunkt_Min_2 Ja
                                                                                      19. fbArbeitspunkt_2 Ja
                                                                                      20. ftRegler_Typ VAG
                                                                                      21. ftProgramm_2 Standard-Programm
                                                                                      22. fz_kv_2
                                                                                      23. fatMedium [08]
                                                                                      24. fzDichte 08
                                                                                      25. ftEinheit_Dichte kgm3
                                                                                      26. fzV_Norm 30
                                                                                      27. ftEinheit_Volstrom m3h
                                                                                      28. fz_pe_2 80
                                                                                      29. fz_pG_2 60
                                                                                      30. fzDelta_p_Soll_2 20
                                                                                      31. ftEinheit_Druck2 [mbar]
                                                                                      32. ftEinheit_Geschw [ms]
                                                                                      33. fatTyp_2 [10954451150103322]
                                                                                      34. fbArbeitspunkt_Min_3 Ja
                                                                                      35. fbArbeitspunkt_3 Ja
                                                                                      36. ftProgramm_3 Standard-Programm
                                                                                      37. fz_kv_3
                                                                                      38. fz_pe_3 20
                                                                                      39. fz_pG_3 0
                                                                                      40. fzDelta_p_Soll_3 20
                                                                                      41. fatTyp_3 [123]
                                                                                      42. fatSchaltleistung [6363683]
                                                                                      43. fz_nop_Stunde 1
                                                                                      44. fz_nop_Jahr 8760
                                                                                      45. fzZyklus 3600
                                                                                      46. fzB10d 6363683
                                                                                      47. fzT10d 10
                                                                                      48. fzPFHd_1V 15714170551864384e-8
                                                                                      49. fzPFDavg_1V
                                                                                      50. ftGeeignet_1V PL d SIL 2
                                                                                      51. fzPFHd_2V 33505832253532625e-10
                                                                                      52. fzPFDavg_2V
                                                                                      53. ftGeeignet_2V PL e SIL 3
                                                                                      54. ftUebersicht Off
                                                                                      55. ftVerstaendlichkeit Off
                                                                                      56. ftFehlende_Info
                                                                                      57. ftUmfang Off
                                                                                      58. ftVerwendung_1 Off
                                                                                      59. ftVerwendung_2 Off
                                                                                      60. ftVerwendung_3 Off
                                                                                      61. ftVerwendung_4 Off
                                                                                      62. ftNavigation Off
                                                                                      63. ftTaetigkeitsbereich Off
                                                                                      64. ftBemerkung
                                                                                      65. Michael Rehkamp Elster Kromschroumlder>btnSenden
Page 54: VAD, VAG, VAV, VAH, VRH, VCD, VCG, VCV, VCH · PDF fileVAD, VAG, VAH, VAV, VRH, VCD, VCG, VCV, VCH · Edition 04.15 6 VAD VAD VAS 1 .1 Examples of application 1 .1 .1 Constant pressure

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415 54

12 10 Safe failure fraction SFFFraction of safe failures related to all failures which are as-sumed to appearsee EN 13611A22011

12 11 Probability of dangerous failure PFHD Value describing the likelihood of dangerous failure per hour of a component for high demand mode or continuous mode Unit 1hsee EN 13611A22011

12 12 Mean time to dangerous failure MTTFd Expectation of the mean time to dangerous failuresee EN ISO 13849-12008

12 13 Demand rate nop Mean number of annual operationssee EN ISO 13849-12008

12 14 Average probability of dangerous failure on demand PFDavg (LDM = 1 ndash 10 switching cyclesyear)Average probability of a dangerous failure of the safety function on demand (LDM = low demand mode)see EN 61508-6

Glossary

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415

Finally we are offering you the opportunity to assess this ldquoTechnical Information (TI)rdquo and to give us your opinion so that we can improve our documents further and suit them to your needs

ClarityFound information quicklySearched for a long timeDidnrsquot find informationWhat is missing

ComprehensionCoherentToo complicatedNo answer

ScopeToo littleSufficientToo wideNo answer

No answer

NavigationI can find my way aroundI got ldquolostrdquoNo answer

UseTo get to know the productTo choose a productPlanningTo look for information

My scope of functionsTechnical departmentSalesNo answer

Remarks

(Adobe Reader 7 or higher required) wwwadobecom

Elster GmbH Postfach 2809 middot 49018 Osnabruumlck Strotheweg 1 middot 49504 Lotte (Buumlren) GermanyT +49 541 1214-0 F +49 541 1214-370 infokromschroedercomwwwkromschroedercom

The current addresses of our international agents are available on the Internetwwwkromschroederdeindexphpid=718ampL=1

We reserve the right to make technical modifications in the interests of progressCopyright copy 2015 Elster GmbH All rights reserved

Contact

Feedback

0325

0530

  • Pressure regulators with solenoid valve VAD VAG VAV VAH
  • Flow rate regulator VRH
  • Pressure regulators with double solenoid valve VCD VCG VCV VCH
  • Contents
  • 1 Application
    • 11 Examples of application
      • 111 Constant pressure control
      • 112 Constant pressure control with two gas solenoid valves
      • 113 Constant pressure control with max pressure switch
      • 114 Constant pressure control with non-controlled pilot gas outlet
      • 115 Modulating control
      • 116 Modulating control with two gas solenoid valves
      • 117 Modulating control with two gas solenoid valves and inlet pressure switch
      • 118 HighLow control
      • 119 Zero pressure control
      • 1110 Staged flow rate control
      • 1111 Continuous or staged flow rate control
      • 1112 Modulating control with variable airgas ratio control with gas solenoid valve
      • 1113 Modulating control in residential heat generation
          • 2 Certification
          • 3 Function
            • 31 VAD VAG VAH VRH VAV
              • 311 Pressure regulator for gas VAD
              • 312 Airgas ratio control VAG
              • 313 Flow rate regulators VAH VRH
              • 314 Variable airgas ratio control VAV
              • 315 Pressure regulator with gas solenoid valve VAxS position indicator with visual indicator
                • 32 Animation
                • 33 Connection diagram
                  • 331 VAx with M20 cable gland
                  • 332 VAx with plug
                  • 333 VAS with VADVAGVAHVAV with M20 cable gland
                  • 334 VAS with VADVAGVAHVAV with plug
                      • 4 Replacement possibilities for MODULINE pressure regulators with gas solenoid valve
                        • 41 GVS GVI GVIB GVR and GVRH are to be replaced by VAD VAG VAG+VAS VAH and VAV
                          • 5 Flow rate
                            • 51 Selection example for VAD
                              • 511 Calculate VAD
                                • 52 Selection example for VAG VAH VRH VAV
                                  • 521 CalculateVAG VxHVAV
                                    • 53 Selection example for zero governor VAGN
                                      • 531 Calculate VAGN
                                          • 6 Selection
                                            • 61 Selection table for pressure regulator with solenoid valve VAD
                                            • 62 Type code for VAD
                                            • 63 Selection table for airgas ratio control with solenoid valve VAG flow rate regulators VAH VRH
                                            • 64 Type code for VAG VAH VRH
                                            • 65 Selection table for variable airgas ratio control with solenoid valve VAV
                                            • 66 Type code for VAV
                                            • 67 Accessories
                                              • 7 Project planning information
                                                • 71 Installation
                                                  • 711 Installation position
                                                    • 72 Setting the low-fire rate on VAG VAH VRH VAV
                                                    • 73 Setting the high-fire rate on VAV
                                                      • 731 Calculation
                                                          • 8 Accessories
                                                            • 81 Gas pressure switch DGVC for VAx VRH
                                                            • 82 Gas pressure switch DGVCT for VAxT VRHT
                                                            • 83 Bypass valvepilot gas valve VAS 1
                                                              • 831 VAS 1 attached to VADVAGVAHVAV 1
                                                              • 832 VAS 1 attached to VADVAGVAHVAV 2 VADVAGVAHVAV 3
                                                              • 833 Flow rate
                                                                • 84 Bypass valvepilot gas valve VBY 8 for VADVAGVAHVAV 1
                                                                  • 841 Scope of delivery VBY 8I as bypass valve
                                                                  • 842 Scope of delivery VBY 8R as pilot gas valve
                                                                  • 843 Selection
                                                                  • 844 Type code
                                                                  • 845 Flow rate
                                                                  • 846 Technical data
                                                                    • 85 Tightness control TC 116V
                                                                    • 86 Pressure test points
                                                                    • 87 Cable gland set
                                                                    • 88 Seal set VA 1thinspndashthinsp3
                                                                    • 89 Differential pressure orifice
                                                                    • 810 Retaining frame
                                                                    • 811 Attachment block
                                                                    • 812 Gas control line
                                                                    • 813 Measuring orifice VMO
                                                                    • 814 Filter module VMF
                                                                    • 815 Fine-adjusting valve VMV
                                                                      • 9 Technical data
                                                                        • 91 VAD
                                                                        • 92 VAG
                                                                        • 93 VAH VRH
                                                                        • 94 VAV
                                                                        • 95 Safety-specific characteristic values for VAx 1thinspndashthinsp3
                                                                          • 951 Determining the PFHD value the λD value and the MTTFd value
                                                                          • 952 Calculating the PFHD and PFDavg
                                                                            • 96 Dimensions
                                                                              • 10 Converting units
                                                                              • 11 Maintenance cycles
                                                                              • 12 Glossary
                                                                                • 121 Diagnostic coverage DC
                                                                                • 122 Mode of operation
                                                                                • 123 Category
                                                                                • 124 Common cause failure CCF
                                                                                • 125 Fraction of undetected common cause failures β
                                                                                • 126 B10d value
                                                                                • 127 T10d value
                                                                                • 128 Hardware fault tolerance HFT
                                                                                • 129 Mean dangerous failure rate λD
                                                                                • 1210 Safe failure fraction SFF
                                                                                • 1211 Probability of dangerous failure PFHD
                                                                                • 1212 Mean time to dangerous failure MTTFd
                                                                                • 1213 Demand rate nop
                                                                                • 1214 Average probability of dangerous failure on demand PFDavg
                                                                                  • Feedback
                                                                                  • Contact
                                                                                      1. naechste_Seite 24
                                                                                      2. naechste Seite 18
                                                                                      3. naechste Seite 6
                                                                                      4. naechste Seite 16
                                                                                      5. naechste Seite 14
                                                                                      6. naechste Seite 25
                                                                                      7. naechste_Seite 11
                                                                                      8. naechste_Seite 17
                                                                                      9. fbArbeitspunkt_Min Ja
                                                                                      10. fbArbeitspunkt Ja
                                                                                      11. ftProgramm Standard-Programm
                                                                                      12. fz_kv
                                                                                      13. fz_pe 80
                                                                                      14. fz_pG 60
                                                                                      15. fzDelta_p_Soll 20
                                                                                      16. ftEinheit_Druck mbar
                                                                                      17. fatTyp [115]
                                                                                      18. fbArbeitspunkt_Min_2 Ja
                                                                                      19. fbArbeitspunkt_2 Ja
                                                                                      20. ftRegler_Typ VAG
                                                                                      21. ftProgramm_2 Standard-Programm
                                                                                      22. fz_kv_2
                                                                                      23. fatMedium [08]
                                                                                      24. fzDichte 08
                                                                                      25. ftEinheit_Dichte kgm3
                                                                                      26. fzV_Norm 30
                                                                                      27. ftEinheit_Volstrom m3h
                                                                                      28. fz_pe_2 80
                                                                                      29. fz_pG_2 60
                                                                                      30. fzDelta_p_Soll_2 20
                                                                                      31. ftEinheit_Druck2 [mbar]
                                                                                      32. ftEinheit_Geschw [ms]
                                                                                      33. fatTyp_2 [10954451150103322]
                                                                                      34. fbArbeitspunkt_Min_3 Ja
                                                                                      35. fbArbeitspunkt_3 Ja
                                                                                      36. ftProgramm_3 Standard-Programm
                                                                                      37. fz_kv_3
                                                                                      38. fz_pe_3 20
                                                                                      39. fz_pG_3 0
                                                                                      40. fzDelta_p_Soll_3 20
                                                                                      41. fatTyp_3 [123]
                                                                                      42. fatSchaltleistung [6363683]
                                                                                      43. fz_nop_Stunde 1
                                                                                      44. fz_nop_Jahr 8760
                                                                                      45. fzZyklus 3600
                                                                                      46. fzB10d 6363683
                                                                                      47. fzT10d 10
                                                                                      48. fzPFHd_1V 15714170551864384e-8
                                                                                      49. fzPFDavg_1V
                                                                                      50. ftGeeignet_1V PL d SIL 2
                                                                                      51. fzPFHd_2V 33505832253532625e-10
                                                                                      52. fzPFDavg_2V
                                                                                      53. ftGeeignet_2V PL e SIL 3
                                                                                      54. ftUebersicht Off
                                                                                      55. ftVerstaendlichkeit Off
                                                                                      56. ftFehlende_Info
                                                                                      57. ftUmfang Off
                                                                                      58. ftVerwendung_1 Off
                                                                                      59. ftVerwendung_2 Off
                                                                                      60. ftVerwendung_3 Off
                                                                                      61. ftVerwendung_4 Off
                                                                                      62. ftNavigation Off
                                                                                      63. ftTaetigkeitsbereich Off
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Page 55: VAD, VAG, VAV, VAH, VRH, VCD, VCG, VCV, VCH · PDF fileVAD, VAG, VAH, VAV, VRH, VCD, VCG, VCV, VCH · Edition 04.15 6 VAD VAD VAS 1 .1 Examples of application 1 .1 .1 Constant pressure

VAD VAG VAH VAV VRH VCD VCG VCV VCH middot Edition 0415

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0530

  • Pressure regulators with solenoid valve VAD VAG VAV VAH
  • Flow rate regulator VRH
  • Pressure regulators with double solenoid valve VCD VCG VCV VCH
  • Contents
  • 1 Application
    • 11 Examples of application
      • 111 Constant pressure control
      • 112 Constant pressure control with two gas solenoid valves
      • 113 Constant pressure control with max pressure switch
      • 114 Constant pressure control with non-controlled pilot gas outlet
      • 115 Modulating control
      • 116 Modulating control with two gas solenoid valves
      • 117 Modulating control with two gas solenoid valves and inlet pressure switch
      • 118 HighLow control
      • 119 Zero pressure control
      • 1110 Staged flow rate control
      • 1111 Continuous or staged flow rate control
      • 1112 Modulating control with variable airgas ratio control with gas solenoid valve
      • 1113 Modulating control in residential heat generation
          • 2 Certification
          • 3 Function
            • 31 VAD VAG VAH VRH VAV
              • 311 Pressure regulator for gas VAD
              • 312 Airgas ratio control VAG
              • 313 Flow rate regulators VAH VRH
              • 314 Variable airgas ratio control VAV
              • 315 Pressure regulator with gas solenoid valve VAxS position indicator with visual indicator
                • 32 Animation
                • 33 Connection diagram
                  • 331 VAx with M20 cable gland
                  • 332 VAx with plug
                  • 333 VAS with VADVAGVAHVAV with M20 cable gland
                  • 334 VAS with VADVAGVAHVAV with plug
                      • 4 Replacement possibilities for MODULINE pressure regulators with gas solenoid valve
                        • 41 GVS GVI GVIB GVR and GVRH are to be replaced by VAD VAG VAG+VAS VAH and VAV
                          • 5 Flow rate
                            • 51 Selection example for VAD
                              • 511 Calculate VAD
                                • 52 Selection example for VAG VAH VRH VAV
                                  • 521 CalculateVAG VxHVAV
                                    • 53 Selection example for zero governor VAGN
                                      • 531 Calculate VAGN
                                          • 6 Selection
                                            • 61 Selection table for pressure regulator with solenoid valve VAD
                                            • 62 Type code for VAD
                                            • 63 Selection table for airgas ratio control with solenoid valve VAG flow rate regulators VAH VRH
                                            • 64 Type code for VAG VAH VRH
                                            • 65 Selection table for variable airgas ratio control with solenoid valve VAV
                                            • 66 Type code for VAV
                                            • 67 Accessories
                                              • 7 Project planning information
                                                • 71 Installation
                                                  • 711 Installation position
                                                    • 72 Setting the low-fire rate on VAG VAH VRH VAV
                                                    • 73 Setting the high-fire rate on VAV
                                                      • 731 Calculation
                                                          • 8 Accessories
                                                            • 81 Gas pressure switch DGVC for VAx VRH
                                                            • 82 Gas pressure switch DGVCT for VAxT VRHT
                                                            • 83 Bypass valvepilot gas valve VAS 1
                                                              • 831 VAS 1 attached to VADVAGVAHVAV 1
                                                              • 832 VAS 1 attached to VADVAGVAHVAV 2 VADVAGVAHVAV 3
                                                              • 833 Flow rate
                                                                • 84 Bypass valvepilot gas valve VBY 8 for VADVAGVAHVAV 1
                                                                  • 841 Scope of delivery VBY 8I as bypass valve
                                                                  • 842 Scope of delivery VBY 8R as pilot gas valve
                                                                  • 843 Selection
                                                                  • 844 Type code
                                                                  • 845 Flow rate
                                                                  • 846 Technical data
                                                                    • 85 Tightness control TC 116V
                                                                    • 86 Pressure test points
                                                                    • 87 Cable gland set
                                                                    • 88 Seal set VA 1thinspndashthinsp3
                                                                    • 89 Differential pressure orifice
                                                                    • 810 Retaining frame
                                                                    • 811 Attachment block
                                                                    • 812 Gas control line
                                                                    • 813 Measuring orifice VMO
                                                                    • 814 Filter module VMF
                                                                    • 815 Fine-adjusting valve VMV
                                                                      • 9 Technical data
                                                                        • 91 VAD
                                                                        • 92 VAG
                                                                        • 93 VAH VRH
                                                                        • 94 VAV
                                                                        • 95 Safety-specific characteristic values for VAx 1thinspndashthinsp3
                                                                          • 951 Determining the PFHD value the λD value and the MTTFd value
                                                                          • 952 Calculating the PFHD and PFDavg
                                                                            • 96 Dimensions
                                                                              • 10 Converting units
                                                                              • 11 Maintenance cycles
                                                                              • 12 Glossary
                                                                                • 121 Diagnostic coverage DC
                                                                                • 122 Mode of operation
                                                                                • 123 Category
                                                                                • 124 Common cause failure CCF
                                                                                • 125 Fraction of undetected common cause failures β
                                                                                • 126 B10d value
                                                                                • 127 T10d value
                                                                                • 128 Hardware fault tolerance HFT
                                                                                • 129 Mean dangerous failure rate λD
                                                                                • 1210 Safe failure fraction SFF
                                                                                • 1211 Probability of dangerous failure PFHD
                                                                                • 1212 Mean time to dangerous failure MTTFd
                                                                                • 1213 Demand rate nop
                                                                                • 1214 Average probability of dangerous failure on demand PFDavg
                                                                                  • Feedback
                                                                                  • Contact
                                                                                      1. naechste_Seite 24
                                                                                      2. naechste Seite 18
                                                                                      3. naechste Seite 6
                                                                                      4. naechste Seite 16
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                                                                                      6. naechste Seite 25
                                                                                      7. naechste_Seite 11
                                                                                      8. naechste_Seite 17
                                                                                      9. fbArbeitspunkt_Min Ja
                                                                                      10. fbArbeitspunkt Ja
                                                                                      11. ftProgramm Standard-Programm
                                                                                      12. fz_kv
                                                                                      13. fz_pe 80
                                                                                      14. fz_pG 60
                                                                                      15. fzDelta_p_Soll 20
                                                                                      16. ftEinheit_Druck mbar
                                                                                      17. fatTyp [115]
                                                                                      18. fbArbeitspunkt_Min_2 Ja
                                                                                      19. fbArbeitspunkt_2 Ja
                                                                                      20. ftRegler_Typ VAG
                                                                                      21. ftProgramm_2 Standard-Programm
                                                                                      22. fz_kv_2
                                                                                      23. fatMedium [08]
                                                                                      24. fzDichte 08
                                                                                      25. ftEinheit_Dichte kgm3
                                                                                      26. fzV_Norm 30
                                                                                      27. ftEinheit_Volstrom m3h
                                                                                      28. fz_pe_2 80
                                                                                      29. fz_pG_2 60
                                                                                      30. fzDelta_p_Soll_2 20
                                                                                      31. ftEinheit_Druck2 [mbar]
                                                                                      32. ftEinheit_Geschw [ms]
                                                                                      33. fatTyp_2 [10954451150103322]
                                                                                      34. fbArbeitspunkt_Min_3 Ja
                                                                                      35. fbArbeitspunkt_3 Ja
                                                                                      36. ftProgramm_3 Standard-Programm
                                                                                      37. fz_kv_3
                                                                                      38. fz_pe_3 20
                                                                                      39. fz_pG_3 0
                                                                                      40. fzDelta_p_Soll_3 20
                                                                                      41. fatTyp_3 [123]
                                                                                      42. fatSchaltleistung [6363683]
                                                                                      43. fz_nop_Stunde 1
                                                                                      44. fz_nop_Jahr 8760
                                                                                      45. fzZyklus 3600
                                                                                      46. fzB10d 6363683
                                                                                      47. fzT10d 10
                                                                                      48. fzPFHd_1V 15714170551864384e-8
                                                                                      49. fzPFDavg_1V
                                                                                      50. ftGeeignet_1V PL d SIL 2
                                                                                      51. fzPFHd_2V 33505832253532625e-10
                                                                                      52. fzPFDavg_2V
                                                                                      53. ftGeeignet_2V PL e SIL 3
                                                                                      54. ftUebersicht Off
                                                                                      55. ftVerstaendlichkeit Off
                                                                                      56. ftFehlende_Info
                                                                                      57. ftUmfang Off
                                                                                      58. ftVerwendung_1 Off
                                                                                      59. ftVerwendung_2 Off
                                                                                      60. ftVerwendung_3 Off
                                                                                      61. ftVerwendung_4 Off
                                                                                      62. ftNavigation Off
                                                                                      63. ftTaetigkeitsbereich Off
                                                                                      64. ftBemerkung
                                                                                      65. Michael Rehkamp Elster Kromschroumlder>btnSenden