controles para co2 ra0xa102
TRANSCRIPT
Components for CO2 applications in Industrial Refrigeration
Application guide
Refrigeration and Air Conditioning Controls
R E F R I G E R A T I O N A N D A I R C O N D I T I O N I N G
2 RA0XA102 Danfoss A/S (RC-CM / MWA), 06 - 2003
Technical leafl et Industrial Refrigeration Valves for CO2 Applications
Contents Page
Introduction................................................................................................................................... 3
General information about CO2 .................................................................................................... 3
Design pressure...................................................................................................................... 3
Material compatibility .............................................................................................................. 4
Water in CO2 systems............................................................................................................. 5
Safety valves in CO2 systems ................................................................................................. 7
Capacity.................................................................................................................................. 7
Components for CO2 .................................................................................................................... 8
Coils for solenoid valves ............................................................................................................... 9
Pressure transmitters ................................................................................................................. 10
Filter Driers................................................................................................................................. 11
Ordering ..................................................................................................................................... 12
Delivery....................................................................................................................................... 19
Technical leafl et Industrial Refrigeration Valves for CO2 Applications
Danfoss A/S (RC-CM / MWA), 06 - 2003 RA0XA102 3
Introduction The objective of this application guide is to provide an overview of which Danfoss Industrial Refrigeration products are suitable for use in CO2 applications.
Today, Danfoss is offering a broad programme of industrial products applicable for CO2, however this is dependent on demands regarding the design pressure. The table on page 8 lists the components which are suitable for CO2 applications together with the maximum working pressure limits.
General information about CO2
For further background information about CO2 as a refrigerant, please refer to the Danfoss article "CO2 Refrigerant for Industrial Refrigeration" (literature number RZ0ZR).
There are a number of important factors to be taken into consideration when determining the design pressure.
1. Pressure during operation: The pressure during operation is dependent on actual system design (single stage, cascade system or CO2- ”brine” system) and the load variation.
2. Pressure during “stand still”: The pressure during stand still can be very high and this has to be taken into consideration:
• A small separate refrigeration system can be used to keep the liquid temperature at a level, where the saturated pressure is lower than the design pressure
• Designing the system with an expansion vessel of a size that prevents the pressure from exceeding the design pressure.
• Designing the plant so that it can withstand the saturated pressure at the design temperature (approx. 80 bar)
From Danfoss’ experience, it would appear that the most common solution for industrial refrigeration applications is to use a small separate refrigeration system to limit the temperature of the liquid CO2.
Design pressure 3. Pressure tolerances for safety valves (10 – 15 %) Safety valves require a certain pressure difference (difference between set pressure and reseating pressure) to ensure that the valve is closed properly. Normally the closing tolerance is 10% of the set pressure. Additionally, it is good practice to add 3-5% to the closing tolerance, to take care of any pressure variations / peaks.
Note: In the “IoR - Code of Practice” issued by the Institute of Refrigeration in London, the above mentioned tolerance is stated to be 20%
4. Temperature / pressure requrements for defrosting Depending on the actual design, different ways of defrosting can be applied (natural, water, electrical or CO2 hot gas defrosting). The CO2 hot gas defrosting is the most effi cient, especially at low temperatures, but it also has the highest pressure demand. With a design pressure of PS=50 bar, it is possible to reach a defrosting temperature of approx. 9-10°C. The saturated pressure at 9°C is 43.9 bar g. By adding 10% for the safety valves and approx. 5% for pressure peaks, the requirement is for pressure PS ~ 50 bar g.
There is not one common method to perform defrosting. All methods, as described above, are used, depending on the system, but also on the availability of suitable compressors and other components.
4 RA0XA102 Danfoss A/S (RC-CM / MWA), 06 - 2003
Technical leafl et Industrial Refrigeration Valves for CO2 Applications
Material compatibility The tests have shown that CO2 is different, and modifi cations have to be made on some products. The large amount of CO2, which can dissolve in polymers, has to be taken into consideration. Some commonly used polymers are not compatable with CO2, and others require different fi xing methods e.g. sealing materials.
When the pressure is close to the critical pressure and the temperature is high, the impact on polymers is much more extreme. However, those conditions are not important for industrial refrigeration as pressure and temperatures are lower for these systems.
CO2 is compatible with almost all common metallic materials, unlike NH3. There are no restrictions from a compatibility point of view, when using copper or brass.
The compatibility of CO2 and polymers is much more complex. As CO2 is a very inert and stable substance, the chemical reaction with polymers is not critical. The main concern with CO2 is the physiochemical effects, such as permeation, swelling and the generation of cavities and internal fractures. These effects are connected with the solubility and diffusivity of CO2 in the actual material.
Danfoss has carried out a number of tests to ensure that components released for use with CO2 can withstand the impact of CO2 in all aspects.
Technical leafl et Industrial Refrigeration Valves for CO2 Applications
Danfoss A/S (RC-CM / MWA), 06 - 2003 RA0XA102 5
In NH3 systems it is well known that there are problems as a result of reaction with oil, oxygen, water and solid contaminations, but these are all handled today by frequent oil changes and use of air purgers. Compared to NH3 CO2 is less sensitive, but if water is present, problems may occur.
How can water penetrate into a CO2 system?
• The pressure of CO2 systems is always above the atmospheric pressure, therefore there are not the same risks as in e.g. NH3 systems, of air/water penetration into a leaking CO2 system. However, pemeation of water into the system is still possible.
• When charging CO2, there are different grades of CO2, some of which allow relatively high amounts of water.
• CO2 is treated as a very safe refrigerant, and is therefore handled without following the normal safety requirements. If a system is opened up, air can penetrate into it, and the moisture can condense inside the tubes. If the system is not evacuated properly, some water may well be retained.
• By charging lubricant (oil) to the compressor.
The acceptable amount of water in CO2 systems is much lower than in systems with other common refrigerants. If the water content exceeds the dew-point, and the temperature is below 0°C, the water will freeze, creating a risk of problems with equipment in the system e.g. blocking control valves. The water can very easily be removed by mounting a drier in the system.
Driers in CO2 are very effi cient, and are normally mounted in the liquid line to avoid any unnecessary pressure drops being created.
Water in CO2 systems
Water Solubility in Refrigerants.
Liquid Phase(Y-Axis Linear)
0
500
1000
1500
2000
2500
-60 -50 -40 -30 -20 -10 0 10 20 30 40 50 60
Temperature [ oC]
mg
of
wate
r/kg
refr
igera
nt
[pp
m]
Water Solubility in Refrigerants.
Gas Phase(Y-Axis Linear)
0
200
400
600
800
1000
1200
1400
1600
-60 -50 -40 -30 -20 -10 0 10 20 30 40 50 60
Temperature [oC]
mg
of
wate
r/kg
of
refr
igera
nt
[pp
m]
CO2
CO2
R134aR134a
Fig. 1: Water solubility
Fig. 1 shows the maximum (water) moisture content that can be dissolved in the liquid and gas phases of CO2, compared with R 134a.
6 RA0XA102 Danfoss A/S (RC-CM / MWA), 06 - 2003
Technical leafl et Industrial Refrigeration Valves for CO2 Applications
0
200
400
600
800
1000
1200
1400
1600
-60 -50 -40 -30 -20 -10 0 10 20 30 40 50 60
Temperature [°C]
mg
of
wa
ter/
kg
of
refr
ige
ran
t [p
pm
]
CO2
NH3R134a
R22
R404A
0
10
20
30
40
50
60
70
80
90
100
-50 -40 -30 -20 -10 0 10 20
Temperature [°C]
mg
of
wa
ter/k
g o
f re
frig
era
nt
[pp
m]
CO2 + H2O gasPhase
CO2 +
ICE
CO2 +
WaterCO2
Fig. 2: Water solubility
Water solubility in RefrigerantsGas Phase(Y-Axis Linear)
Water in CO2 systems(cont.)
0
10
20
30
40
50
60
70
80
90
100
-50 -40 -30 -20 -10 0 10 20
Temperature [ºC]
mg
of
wate
r/kg
refr
igera
nt
[pp
m] "Wet"
"Dry"
Fig. 3: SGN moisture indication for CO2
Water in CO2
Danfoss Sight Glass SGN in CO2
In fi g. 2, the maximum water content, which can be dissolved in the CO2 gas phase, is compared with other commonly used refrigerants. The maximum water content
for CO2 is much lower than for the other refrigerants. If the maximum concentration is exceeded, this will appear as free water or as ice in the refrigeration system.
An indication of water content can be obtained by using a Danfoss SGN sight glass.- A “dry” system is shown with a green indicator- A “wet” system is shown with a yellow indicator
Water/moisture content values for these conditions are shown in fi g. 3
Technical leafl et Industrial Refrigeration Valves for CO2 Applications
Danfoss A/S (RC-CM / MWA), 06 - 2003 RA0XA102 7
Water in CO2 systems(cont.)
Fig. 4: CO2 systems with DML fi lter drier and SGN indicator
Due to the thermodynamic properties of CO2, in particular the triple point, which is located at much higher pressure than for all other common refrigerants, the formation of solid CO2 can occur.
If a safety valve is mounted in a CO2 system at e.g. 50 bar, the pressure in the downstream (outlet) line from the safety valve will pass the triple point at 5.2 bar.Below the triple point, CO2 will change from a mixture of liquid and vapour into a mixture of solid and vapour. The formation of solid CO2 in the downstream line can, in the worst case, block this line.
Safety valves in CO2 systems
The most effective solution to this problem is to mount the safety valve without an outlet line, thus blowing directly into the atmosphere.
The phase change of the CO2 does not take place directly in the valve, but just after the valve, and in this case in the atmosphere.
If safety valves or any other safety devices, have to be mounted in liquid lines, they must never blow to the atmosphere or any other places where the backpressure is below 5.2 bar.If the back-pressure is below the triple point (5.2 bar) a very high fraction of the CO2 will be solid.
Fig. 5: Flow in downstream lines from safety valves
CO2 system with fi lter drier and indicator
Filter drier Moisture indicator
CondenserEvaporator
Capacity CO2 capacity calculations for Danfoss Industrial Refrigeration components can be undertaken using the DIRcalc selection software.
8 RA0XA102 Danfoss A/S (RC-CM / MWA), 06 - 2003
Technical leafl et Industrial Refrigeration Valves for CO2 Applications
Components for CO2 Today, Danfoss is offering a broad programme of industrial components applicable for CO2.
The majority of components listed below have been evaluated and upgraded, and are therefore applicable for CO2 within the pressure and temperature range stated in the technical documentation. In particular the pressure is the limiting factor for this group of components.
Special components for “high” pressure CO2 applications have been developed. The most common types of valves are listed on the following pages.
Please note the high pressure specials are generally available to order only and extended delivery times should be considered.
Pressure Equipment Directive (PED)The Industrial Refrigeration valves are approved in accordance with the European standards specifi ed in the Pressure Equipment Directive and are CE marked.
All marked components are applicable for CO2 in the standard execution. These components are applicable for CO2 40 bar or 50 bar.
In connection with the CE approval of these valves, Danfoss has implemented product modifi cations and approved them for the maximum pressure. The products are subject to specifi c testing and marking, but all of them are CE approved.
CO2
20
25
30
35
40
45
50
55
60
-30 -20 -10 0 10 20
Design temperature (°C)
Pre
ss
ure
(b
ar)
Design pressure (bar-g): PS + 15 %
"Saturated"pressure (bar-a)
PS + 10% (bar-g)
PS 50
PS 40
PS 25
high pressure components
DN PS
25
bar
PS
40
bar
PS
50
bar
Modulating liquid level regulators PMFL PMFH all 5 - 65
Main Valves, Solenoid Valves PM1 PM3 PML PMLX all 5 - 65
Pilot Valves for PM Main Valves EVM
Other pilots
Motor Regulating Valves MRV all 5 - 65
Motor Expansion Valves MEV all 5 - 65
Float Valves HFI 100, 150 100 - 150
SV 1-3 & 4,5,6
Stop Valves SVA 10 - 200 10 - 200
SVA 250, 300 250 - 300
Regulating Valves REG all 15 - 65
Stop Check Valves SCA all 15 - 125
Gas Powered Stop Valve GPLX 80, 100, 125 80 - 125
SFV 15, 20, 25 15 - 25
BSV 8 8
DSV 1, DSV 2 all 20 - 32 **) 1
POV 40, 50, 80 40 - 80
Filters FIA all 15 - 200
NRVA all 15 - 65
NRVS 20, 25, 32 20 - 32
CHV all 15 - 40
Solenoid Valves EVRA all 10 - 40 **) 1
EVRS all 10 - 25 **) 1 **) 1
Electrically operated expansion valve AKVA all 15 - 40 **) 1
Level Indicator AKS 41 all
The product can
be used in
standard version.
All products are
CE approved
The product must
be manufactured
in a special
version (design
modif ication,
higher test
pressure, marking
All products are
CE approved
and documentation).
Safety Valves and Change Over Valves
Check Valves
The product must
be manufactured
in a special
version (higher
test pressure,
marking and
documentation).
All products are
CE approved
Danfoss industrial refrigeration
Filter drier DML
Moisture indicator SGN 35 bar
42 bar
Technical leafl et Industrial Refrigeration Valves for CO2 Applications
Danfoss A/S (RC-CM / MWA), 06 - 2003 RA0XA102 9
Due to the high pressure difference between the condenser and evaporator, the Maximum Opening Pressure Differential (MOPD) demand for the solenoid valve in some applications may exceed the standard coil capabilities.
Typical applications could be:Liquid injection for cooling the compressorHot gas defrostShut off valve before expansion valve
Therefore Danfoss offers a 20 W coil, that covers a MOPD range up to 40 bar. The 20 W coil program includes 24, 110 and 230 V a.c. 50 Hz power supplies.
Coils for solenoid valves If the MOPD demands are beyond the capability of the 20 W coil program or a d.c. supply is used, Danfoss has developed a new coil concept, “Power Electronic”. With this new program the MOPD of the solenoid valve can be increased up to 50 bar.
As illustrated below, the power of a coil with "Power Electronic" feature, the inrush is higher than a standard coil. After 100 msec. the power of the coil reduces to a lower level than a standard coil. Therefore "Power Electronic" will give a higher MOPD and a lower power consumption than a standard coil.
For further information, please contact Danfoss
Power
Inrush
Holding
55 watt
4 watt
Time
Power
Time
20 watt
"Power electonic" for 230V, 50Hz Standard coil for 20W, 230V, 50Hz
10 RA0XA102 Danfoss A/S (RC-CM / MWA), 06 - 2003
Technical leafl et Industrial Refrigeration Valves for CO2 Applications
Pressure transmitters AKS 3000 is a series of absolute transmitterswith high-level signal conditioned current output, developed to meet demands in A/C and re frig er a tion.
AKS 3000 utilises the proved piezoresistive measuring principle, which has been used for decades in Danfoss pressure transmitters.
The pressure reference is a sealed gauge. This means that atmospheric pressure variations have no infl uence on regulating ac cu ra cy. A must in accurate low pressure reg u la tion.
Features Designed to meet A/C and refrigeration de-mands without compromising control accuracy concerning
Tough environment• Vibration• Shock during operation and transport• Humidity and ice formation• Temperature variations• Corrosive media like ammonia gases and salt mist
Convenient performance• 4 to 20 mA signal• 1% typical accuracy• 0.5% typical linearity• Prepared for high pressure refrigerants• Bar code for tracing of calibration data
Perfect system integrity• Compact design• Max. working pressure ≤ 33 bar• Temperature compensation for suction line• Optimized accuracy at –10°C and +20°C for suction line installations, see page 4• 1/4 -18 NPT, G 3/8 A or 1/4 fl are ensures tight pressure connection• All laser welded AISI 316L stainless steel enclosure • No soft seals• Enclosure: IP 65 with plug; IP 67 with cable
All materials in contact with the refrigerant and materials for the housing are AISI 316L stain-less steel. No soft gaskets, all en vi ron men tal sealings are made through laser weldings only.
AKS 3000 has a 4 to 20 mA output, and is available with 2 m cable or with spade terminals and DIN 43650 plug.
Application• Fan speed control• High pressure control• Compressor capacity control• Evaporator pressure detection• Oil pressure control
Approvals• UL• CE marked acc. to the EMC directive
Technical leafl et Industrial Refrigeration Valves for CO2 Applications
Danfoss A/S (RC-CM / MWA), 06 - 2003 RA0XA102 11
Eliminator ® liquid line fi lter driers protect refrigeration and air-conditioning systems from moisture, acids, and solid particles. With these contaminants eliminated, systems are safer from harmful chemical reactions and from abrasive impurities.
Type DML driers have a core composition of 100% molecular sieves.
All Eliminator ® driers have a solid core with binding material held to an absolute minimum. Core selection is primarily based on the refrigerant oil used in the system.
Eliminator ® type DML, with a solid core of 100% molecular sieves, is optimised for use with HFC and CO2 refrigerants and polyolester (POE) or polyalkyl glycol (PAG) oils. Type DML driers are designed for applications requiring high water adsorption, and can be used with any manufacturer’s compressor. Because type DML driers contain no activated alumina, oil additives will not be depleted.
Eliminator ® liquid line fi lter driers
The Core• 100% 3Å molecular sieves core.• High drying capacity minimizing the risk of
acid formation (hydrolysis).• Optimized for HFC refrigerants (R 134a,
R 404A, R 410A, etc.) and CO2 with POE or PAG oils. Compatible with R 22.
• Will not deplete oil additives.
The Shell• UL approved for MWP of 42 bar (609 psi).• Available with solder (Cu-plated steel
connectors) and fl are connections.• Compact 3 cubic inches drier ideal for
refrigeration and air conditioning units.• Corrosion resistant powder-painted fi nish.
Can be used in all environments including marine applications.
• Allows installation with any orientation provided the arrow is in the fl ow direction.
• Available in sizes from 3 to 75 cubic inches.
The Filter• 25 µm fi lter provides high retention with
minimal pressure drop.• Thermally stable up to 120°C (248°F).
Features
Capacity DML capacities for CO2 are similar to R134a and R22 and these tables can be used for selection purposes.
12 RA0XA102 Danfoss A/S (RC-CM / MWA), 06 - 2003
Technical leafl et Industrial Refrigeration Valves for CO2 Applications
Stop valve
Size Type Max. Working Pressure
Connection Code Number
mm in.
10 3/8 SVA 10 D ANG STOP VALVE CAP 50 bar (725 psi) DIN 148B3829
10 3/8 SVA 10 D ANG STOP VALVE H-WHEEL 50 bar (725 psi) DIN 148B3830
15 1/2 SVA 15 D ANG STOP VALVE CAP 50 bar (725 psi) DIN 148B3831
15 1/2 SVA 15 D ANG STOP VALVE H-WHEEL 50 bar (725 psi) DIN 148B3832
20 3/4 SVA 20 D ANG STOP VALVE CAP 50 bar (725 psi) DIN 148B3815
20 3/4 SVA 20 D ANG STOP VALVE H-WHEEL 50 bar (725 psi) DIN 148B3833
25 1 SVA 25 D ANG STOP VALVE CAP 50 bar (725 psi) DIN 148B3834
25 1 SVA 25 D ANG STOP VALVE H-WHEEL 50 bar (725 psi) DIN 148B3835
32 11/4 SVA 32 D ANG STOP VALVE CAP 50 bar (725 psi) DIN 148B3836
32 11/4 SVA 32 D ANG STOP VALVE H-WHEEL 50 bar (725 psi) DIN 148B3837
40 11/2 SVA 40 D ANG STOP VALVE CAP 50 bar (725 psi) DIN 148B3838
40 11/2 SVA 40 D ANG STOP VALVE H-WHEEL 50 bar (725 psi) DIN 148B3839
50 2 SVA 50 D ANG STOP VALVE CAP 50 bar (725 psi) DIN 148B3840
50 2 SVA 50 D ANG STOP VALVE H-WHEEL 50 bar (725 psi) DIN 148B3841
65 21/2 SVA 65 D ANG STOP VALVE CAP 50 bar (725 psi) DIN 148B3791
65 21/2 SVA 65 D ANG STOP VALVE CAP 50 bar (725 psi) DIN 148B3842
Regulating valve
Size Type Max. Working Pressure
Connection Code Number
mm in.
15 1/2 REG 15 D ANG CONE#4 50 bar (725 psi) DIN 148G3172
15 1/2 REG 15 D ANG CONE#5 50 bar (725 psi) DIN 148G3173
15 1/2 REG 15 D ANG CONE#6 50 bar (725 psi) DIN 148G3174
15 1/2 REG 15 D ANG CONE#7 50 bar (725 psi) DIN 148G3175
20 3/4 REG 20 D ANG CONE#4 50 bar (725 psi) DIN 148G3176
20 3/4 REG 20 D ANG CONE#5 50 bar (725 psi) DIN 148G3177
20 3/4 REG 20 D ANG CONE#6 50 bar (725 psi) DIN 148G3178
20 3/4 REG 20 D ANG CONE#7 50 bar (725 psi) DIN 148G3179
25 1 REG 25 D ANG CONE#4 50 bar (725 psi) DIN 148G3180
25 1 REG 25 D ANG CONE#5 50 bar (725 psi) DIN 148G3181
25 1 REG 25 D ANG CONE#6 50 bar (725 psi) DIN 148G3182
25 1 REG 25 D ANG CONE#7 50 bar (725 psi) DIN 148G3183
32 11/4 REG 32 D ANG CONE#10 50 bar (725 psi) DIN 148G3184
32 11/4 REG 32 D ANG CONE#8 50 bar (725 psi) DIN 148G3185
32 11/4 REG 32 D ANG CONE#9 50 bar (725 psi) DIN 148G3186
40 11/2 REG 40 D ANG CONE#10 50 bar (725 psi) DIN 148G3187
40 11/2 REG 40 D ANG CONE#8 50 bar (725 psi) DIN 148G3188
40 11/2 REG 40 D ANG CONE#9 50 bar (725 psi) DIN 148G3189
50 2 REG 50 D ANG CONE#11 50 bar (725 psi) DIN 148G3190
65 21/2 REG 65 D ANG CONE#12 50 bar (725 psi) DIN 148G3191
Ordering
Stop check valve
Size Type Max. Working Pressure
Connection Code Number
mm in.
15 1/2 SCA D ANG STOP/CHECK VALVE 50 bar (725 psi) DIN 148G3522
20 3/4 SCA D ANG STOP/CHECK VALVE 50 bar (725 psi) DIN 148G3168
25 1 SCA D ANG STOP/CHECK VALVE 50 bar (725 psi) DIN 148G3523
32 11/4 SCA D ANG STOP/CHECK VALVE 50 bar (725 psi) DIN 148G3524
40 11/2 SCA D ANG STOP/CHECK VALVE 50 bar (725 psi) DIN 148G3525
50 2 SCA D ANG STOP/CHECK VALVE 50 bar (725 psi) DIN 148G3424
65 21/2 SCA D ANG STOP/CHECK VALVE 50 bar (725 psi) DIN 148G3425
The following list details the most commonly used Danfoss refrigeration components for CO2 applications. Components with alternative types of connections and dimensions can be supplied on request.
The Code Numbers specifi ed include a mix of special high pressure and standard products. In both cases the Maximum Working Pressures should be adhered to. The list also includes components which are not suitable for use with NH3, but are suitable for use for CO2 systems (moisture indicators and fi lter driers).
D = Butt weld DIN connectionANG = Angleway
Technical leafl et Industrial Refrigeration Valves for CO2 Applications
Danfoss A/S (RC-CM / MWA), 06 - 2003 RA0XA102 13
Check valve
Size Type Max. Working Pressure
Connection Code Number
mm in.
15 1/2 CHV D ANG CHECK VALVE 50 bar (725 psi) DIN 148G3526
20 3/4 CHV D ANG CHECK VALVE 50 bar (725 psi) DIN 148G3527
25 1 CHV D ANG CHECK VALVE 50 bar (725 psi) DIN 148G3528
32 11/4 CHV D ANG CHECK VALVE 50 bar (725 psi) DIN 148G3529
40 11/2 CHV D ANG CHECK VALVE 50 bar (725 psi) DIN 148G3530
50 2 CHV D ANG CHECK VALVE 50 bar (725 psi) DIN 148G3531
65 21/2 CHV D ANG CHECK VALVE 50 bar (725 psi) DIN 148G3426
Filter
Size Type Max. Working Pressure
Connection Code Number
mm in.
15 1/2 FIA D ANG FILTER HOUSING 50 bar (725 psi) DIN 148H3215
20 3/4 FIA D ANG FILTER HOUSING 50 bar (725 psi) DIN 148H3195
25 1 FIA D ANG FILTER HOUSING 50 bar (725 psi) DIN 148H3216
32 11/4 FIA D ANG FILTER HOUSING 50 bar (725 psi) DIN 148H3217
40 11/2 FIA D ANG FILTER HOUSING 50 bar (725 psi) DIN 148H3218
50 2 FIA D ANG FILTER HOUSING 50 bar (725 psi) DIN 148H3219
65 21/2 FIA D ANG FILTER HOUSING 50 bar (725 psi) DIN 148H3220
Code numbers include bodies only and fi lter inserts to be ordered separately
Check valve
Type Max. Working Pressure
Code Number
NRVA 15 40 bar (580 psi) 020-2070
NRVA 20 40 bar (580 psi) 020-2070
NRVA 25 40 bar (580 psi) 020-2072
NRVA 32 40 bar (580 psi) 020-2072
NRVA 40 40 bar (580 psi) 020-2074
NRVA 50 40 bar (580 psi) 020-2074
NRVA 65 40 bar (580 psi) 020-2076
Flanges have to be ordered separately (See the section Flanges)
Ordering(cont.)
Overfl ow valve
Size Type Max. Working Pressure
Connection Code Number
mm in.
20 3/4 OFV D ANG OVERFLOW VALVE 50 bar (725 psi) DIN 148G3192
25 1 OFV D ANG OVERFLOW VALVE 50 bar (725 psi) DIN 148G3193
The differential pressure can be adjusted 2-8 bar
Stop valve (stainless steel)
Size Type Max. Working Pressure
Connection Code Number
mm in.
15 1/2 SVA-SS 15 D ANG STOP VALVE CAP 50 bar (725 psi) DIN 148B3843
15 1/2 SVA-SS 15 D ANG STOP VALVE H-WHEEL 50 bar (725 psi) DIN 148B3844
20 3/4 SVA-SS 20 D ANG STOP VALVE CAP 50 bar (725 psi) DIN 148B3845
20 3/4 SVA-SS 20 D ANG STOP VALVE H-WHEEL 50 bar (725 psi) DIN 148B3846
25 1 SVA-SS 25 D ANG STOP VALVE CAP 50 bar (725 psi) DIN 148B3847
25 1 SVA-SS 25 D ANG STOP VALVE H-WHEEL 50 bar (725 psi) DIN 148B3848
32 11/4 SVA-SS 32 D ANG STOP VALVE CAP 50 bar (725 psi) DIN 148B3849
32 11/4 SVA-SS 32 D ANG STOP VALVE H-WHEEL 50 bar (725 psi) DIN 148B3850
40 11/2 SVA-SS 40 D ANG STOP VALVE CAP 50 bar (725 psi) DIN 148B3851
40 11/2 SVA-SS 40 D ANG STOP VALVE H-WHEEL 50 bar (725 psi) DIN 148B3852
14 RA0XA102 Danfoss A/S (RC-CM / MWA), 06 - 2003
Technical leafl et Industrial Refrigeration Valves for CO2 Applications
Ordering(cont.)
Overfl ow valve (stainless steel)
Size Type Max. Working Pressure
Connection Code Number
mm in.
20 3/4 OFV-SS 20 D ANG OVER FLOW VALVE 50 bar (725 psi) DIN 148G3194
25 1 OFV-SS 25 D ANG OVER FLOW VALVE 50 bar (725 psi) DIN 148G3195
Differential pressure can be adjusted 2-8 bar
Stop check valve (stainless steel)
Size Type Max. Working Pressure
Connection Code Number
mm in.
15 1/2 SCA-SS 15 D ANG STOP/CHECK VALVE 50 bar (725 psi) DIN 148G3532
20 3/4 SCA-SS 20 D ANG STOP/CHECK VALVE 50 bar (725 psi) DIN 148G3533
25 1 SCA-SS 25 D ANG STOP/CHECK VALVE 50 bar (725 psi) DIN 148G3534
32 13/4 SCA-SS 32 D ANG STOP/CHECK VALVE 50 bar (725 psi) DIN 148G3535
40 11/2 SCA-SS 40 D ANG STOP/CHECK VALVE 50 bar (725 psi) DIN 148G3536
Check valve (stainless steel)
Size Type Max. Working Pressure
Connection Code Number
mm in.
15 1/2 CHV-SS 15 D ANG CHECK VALVE 50 bar (725 psi) DIN 148G3537
20 3/4 CHV-SS 20 D ANG CHECK VALVE 50 bar (725 psi) DIN 148G3538
25 1 CHV-SS 25 D ANG CHECK VALVE 50 bar (725 psi) DIN 148G3539
32 13/4 CHV-SS 32 D ANG CHECK VALVE 50 bar (725 psi) DIN 148G3540
40 11/2 CHV-SS 40 D ANG CHECK VALVE 50 bar (725 psi) DIN 148G3541
Filter (stainless steel)
Size Type Max. Working Pressure
Connection Code Number
mm in.
15 1/2 FIA-SS 15 D ANG FILTER HOUSING 50 bar (725 psi) DIN 148H3221
20 3/4 FIA-SS 20 D ANG FILTER HOUSING 50 bar (725 psi) DIN 148H3222
25 1 FIA-SS 25 D ANG FILTER HOUSING 50 bar (725 psi) DIN 148H3223
32 13/4 FIA-SS 32 D ANG FILTER HOUSING 50 bar (725 psi) DIN 148H3224
40 11/2 FIA-SS 40 D ANG FILTER HOUSING 50 bar (725 psi) DIN 148H3225
Regulating valve (stainless steel)
Size Type Max. Working Pressure
Connection Code Number
mm in.
15 1/2 REG-SS 15 D ANG CONE#4 50 bar (725 psi) DIN 148G3542
15 1/2 REG-SS 15 D ANG CONE#5 50 bar (725 psi) DIN 148G3543
15 1/2 REG-SS 15 D ANG CONE#6 50 bar (725 psi) DIN 148G3544
15 1/2 REG-SS 15 D ANG CONE#7 50 bar (725 psi) DIN 148G3545
20 3/4 REG-SS 20 D ANG CONE#4 50 bar (725 psi) DIN 148G3546
20 3/4 REG-SS 20 D ANG CONE#5 50 bar (725 psi) DIN 148G3547
20 3/4 REG-SS 20 D ANG CONE#6 50 bar (725 psi) DIN 148G3548
20 3/4 REG-SS 20 D ANG CONE#7 50 bar (725 psi) DIN 148G3549
25 1 REG-SS 25 D ANG CONE#4 50 bar (725 psi) DIN 148G3550
25 1 REG-SS 25 D ANG CONE#5 50 bar (725 psi) DIN 148G3551
25 1 REG-SS 25 D ANG CONE#6 50 bar (725 psi) DIN 148G3552
25 1 REG-SS 25 D ANG CONE#7 50 bar (725 psi) DIN 148G3553
32 11/4 REG-SS 32 D ANG CONE#10 50 bar (725 psi) DIN 148G3554
32 11/4 REG-SS 32 D ANG CONE#8 50 bar (725 psi) DIN 148G3555
32 11/4 REG-SS 32 D ANG CONE#9 50 bar (725 psi) DIN 148G3556
40 11/2 REG-SS 40 D ANG CONE#10 50 bar (725 psi) DIN 148G3557
40 11/2 REG-SS 40 D ANG CONE#8 50 bar (725 psi) DIN 148G3558
40 11/2 REG-SS 40 D ANG CONE#9 50 bar (725 psi) DIN 148G3559
Technical leafl et Industrial Refrigeration Valves for CO2 Applications
Danfoss A/S (RC-CM / MWA), 06 - 2003 RA0XA102 15
Solenoid valve with NC/NO pilot valve
Type Max. Working Pressure
Code Number
PML 32 40 bar (580 psi) 027F1801
PML 40 40 bar (580 psi) 027F1802
PML 50 40 bar (580 psi) 027F1803
PML 65 40 bar (580 psi) 027F1804
PML 80 40 bar (580 psi) 027F1805
PML 100 40 bar (580 psi) 027F1806
PML 125 40 bar (580 psi) 027F1807
Flanges have to be ordered separately (See the section Flanges)EVM solenoid valves and coils have to be ordered separately
Pilot operated main valve
Type Max. Working Pressure
Code Number
PM 1 - 5 40 bar (580 psi) 027F4001
PM 1 - 10 40 bar (580 psi) 027F4002
PM 1 - 15 40 bar (580 psi) 027F4003
PM 1 - 20 40 bar (580 psi) 027F4004
PM 1 - 25 40 bar (580 psi) 027F4005
PM 1 - 32 40 bar (580 psi) 027F4006
PM 1 - 40 40 bar (580 psi) 027F4007
PM 1 - 50 40 bar (580 psi) 027F4008
PM 1 - 65 40 bar (580 psi) 027F4009
Flanges have to be ordered separately (See the section Flanges)
Pilot operated main valve
Type Max. Working Pressure
Code Number
PM 3 - 5 40 bar (580 psi) 027F1810
PM 3 - 10 40 bar (580 psi) 027F1811
PM 3 - 15 40 bar (580 psi) 027F1812
PM 3 - 20 40 bar (580 psi) 027F1813
PM 3 - 25 40 bar (580 psi) 027F1814
PM 3 - 32 40 bar (580 psi) 027F1815
PM 3 - 40 40 bar (580 psi) 027F1816
PM 3 - 50 40 bar (580 psi) 027F1817
PM 3 - 65 40 bar (580 psi) 027F1818
Flanges have to be ordered separately (See the section Flanges)
Ordering(cont.)
Pilot
Type Max. Working Pressure
Code Number
CVPP (HP) 40 bar (580 psi) 027B1268
Motor expansion valve
Type Max. Working Pressure
Code Number
MEV 80-2 40 bar (580 psi) 027F4020
MEV 80-3 40 bar (580 psi) 027F4021
MEV 80-4 40 bar (580 psi) 027F4022
MEV 80-5 40 bar (580 psi) 027F4023
MEV 80-6 40 bar (580 psi) 027F4024
MEV 80-7 40 bar (580 psi) 027F4025
MEV 125 40 bar (580 psi) 027F4026
MEV 200 40 bar (580 psi) 027F4027
MEV 300 40 bar (580 psi) 027F4028
MEV 500 40 bar (580 psi) 027F4029
Flanges have to be ordered separately (see the fl ange section)
16 RA0XA102 Danfoss A/S (RC-CM / MWA), 06 - 2003
Technical leafl et Industrial Refrigeration Valves for CO2 Applications
Motor regulating valve
Type Max. Working Pressure
Code Number
MRV 5 40 bar (580 psi) 027F4080
MRV 10 40 bar (580 psi) 027F4081
MRV 15 40 bar (580 psi) 027F4082
MRV 20 40 bar (580 psi) 027F4083
MRV 25 40 bar (580 psi) 027F4084
MRV 32 40 bar (580 psi) 027F4085
MRV 40 40 bar (580 psi) 027F4086
MRV 50 40 bar (580 psi) 027F4087
MRV 65 40 bar (580 psi) 027F4088
Flanges have to be ordered separately. (See the section Flanges)
Ordering(cont.)
Solenoid valve
Size Type Max. Working pressure
Connection Code number
mm in
EVRA 3 40 bar (580 psi) DIN 032X3050
EVRA 10 with manual stem 40 bar (580 psi) DIN 032X6210
EVRA 15 with manual stem 40 bar (580 psi) DIN 032X6215
EVRA 20 with manual stem 40 bar (580 psi) DIN 032X6220
EVRA 25 with manual stem 40 bar (580 psi) DIN 032X6225
32 11/4 EVRA 32 with manual stem 40 bar (580 psi) DIN 042H1126
40 11/2 EVRA 40 with manual stem 40 bar (580 psi) DIN 042H1128
Coils: See “Coils for Solenoid valves”
Solenoid valve stainless steel
Size Type Max. Working Pressure
Connection Code number
mm in
10 3/8 EVRS 3 50 bar (725 psi) DIN 032X3080
15 1/2 EVRST 10 with manual stem 50 bar (725 psi) DIN 032X3083
20 3/4 EVRST 15 with manual stem 50 bar (725 psi) DIN 032X3085
25 1 EVRST 20 with manual stem 50 bar (725 psi) DIN 032X2237
Coils: See “Coils for Solenoid valves”
Electrically operated expansion valve
Valve type Rated capacity1) kv-value ConnectionsInlet x outlet
Code no. ConnectionsInlet x outlet
Code no.
kW tons m3/h in. in.
AKVA 10-1 4 1.1 0.010 3/8 × 1/2 068F3261 1/2 × 3/4 068F3281
AKVA 10-2 6.3 1.8 0.015 3/8 × 1/2 068F3262 1/2 × 3/4 068F3282
AKVA 10-3 10 2.8 0.022 3/8 × 1/2 068F3263 1/2 × 3/4 068F3283
AKVA 10-4 16 4.5 0.038 3/8 × 1/2 068F3264 1/2 × 3/4 068F3284
AKVA 10-5 25 7.1 0.055 3/8 × 1/2 068F3265 1/2 × 3/4 068F3285
AKVA 10-6 40 11.4 0.103 3/8 × 1/2 068F3266 1/2 × 3/4 068F3286
AKVA 10-7 63 17.9 0.162 1/2 × 3/4 068F3267
AKVA 10-8 100 28.4 0.251 1/2 × 3/4 068F3268
AKVA 15-1 125 35 0.25 Flange 068F50202)
AKVA 15-2 200 60 0.40 Flange 068F50232)
AKVA 15-3 300 90 0.63 Flange 068F50262)
AKVA 15-4 500 140 1.0 Flange 068F50292)
AKVA 20-1 500 140 1.0 1 1/4 × 1 1/4 042H2101
AKVA 20-2 800 240 1.6 1 1/4 × 1 1/4 042H2102
AKVA 20-3 1250 350 2.5 1 1/4 × 1 1/4 042H2103
AKVA 20-4 2000 600 4.0 1 1/2 × 1 1/2 042H2104
AKVA 20-5 3150 900 6.3 2 × 2 042H21051) Rated capacities are based on Condensing temperature tc = 32°C Liquid temperature tl = 28°C Evaporating temperature te = 5°C 2) Incl. bolts and gaskets but without fl angesMax. working pressure: 42 bar
Technical leafl et Industrial Refrigeration Valves for CO2 Applications
Danfoss A/S (RC-CM / MWA), 06 - 2003 RA0XA102 17
Butt welding DIN (2448) fl anges for PM, PML, MRV, MEV, EVRA and AKVA
Size OD T OD T Flangetype
For use with valve type Code no.mm in. mm mm in. in.
202532
3/41
11/4
26.933.742.4
2.32.62.6
1.0591.3271.669
0.0910.1030.102
3
PM 5, 10, 15, 20, 25,PML 5, 10, 15, 20, 25, MRV 5, 10, 15, 20, 25,MEV 80EVRA 20, 25AKVA 15-1, 15-2, 15-3, 15-4
027N1220027N1225027N1230
3240
11/411/2
42.448.3
2.62.6
1.6691.902
0.1020.103
10
PM 32, PML 32, MRV 32, MEV 125
027N2332027N2340
4050
11/22
48.360.3
2.62.9
1.9022.370
0.1030.110
11
PM 40, PML 40, MRV 40,MEV 200
027N2440027N2450
5065
221/2
60.376.1
2.92.9
2.3703.000
0.1100.110
12
PM 50, PML 50, MRV 50MEV 300
027N2550027N2565
65 21/2 76.1 2.9 3.000 0.110 13
PM 65, PML 65, MRV 65,MEV 500
027N2665
Butt welding DIN (2448) fl anges for NRVA, EVRA
Size OD T OD T Flangetype
For use with valve type Code no.mm in. mm mm in. in.
10 3/8 18 2 0.710 0.079 1.3 NRVA 15/20, EVRA 3/10/15 027N1112
15 1/2 22 2.5 0.866 0.098 1.3 NRVA 15/20, EVRA 3/10/15 027N1115
20 3/4 26.9 2.3 1.059 0.091 1.3 NRVA 15/20, EVRA 3/10/15 027N1120
25 1 33.7 2.6 1.327 0.103 4 NRVA 25/32 027N1026
32 11/4 42.4 2.6 1.669 0.102 4 NRVA 25/32 027N1033
40 11/2 48.3 2.6 1.902 0.103 6 NRVA 40/50 027N1042
50 2 60.3 2.9 2.370 0.110 6 NRVA 40/50 027N1051
65 21/2 76.1 2.9 3.000 0.110 8 NRVA 65 027N1055
Flanges:Ordering(cont.)
18 RA0XA102 Danfoss A/S (RC-CM / MWA), 06 - 2003
Technical leafl et Industrial Refrigeration Valves for CO2 Applications
Sight glass
Size Type Max. Working Pressure
Connection Code Number
mm in.
6 × 610 × 1012 × 12
1/4 × 1/4 3/8 × 3/8 1/2 × 1/2
SGN 6SGN 10SGN 12
35 bar (507 psi)
Flareext. × ext.
014-0161014-0162014-0163
6 × 610 × 1012 × 12
1/4 × 1/4 3/8 × 3/8 1/2 × 1/2
SGN 6SGN 10SGN 12
Flareint. × ext. 1)
014-0171014-0172014-0173
16 × 16
1/4 × 1/4 3/8 × 3/8 1/2 × 1/2 5/8 × 5/8
SGN 6sSGN 10sSGN 12sSGN 16s
ODF × ODFsolder
014-0181014-0182014-0183014-0184
6 × 610 × 1012 × 1218 × 18
SGN 6sSGN 10sSGN 12sSGN 18s
ODF × ODFsolder
014-0191014-0192014-0193014-0195
16 × 16
1/4 × 1/4 3/8 × 3/8 1/2 × 1/2 5/8 × 5/8
SGN 6sSGN 10sSGN 12sSGN 16s
ODF × ODMsolder
014-0201014-0202014-0203014-0204
1/2 NPT SGRN NPT 014-00061) Can be screwed directly into the fi lter drier.
Level indicator
Type Length
mm
Length
ins
Measuring range
mm
Measuring range
ins
AKS 41without Bargraph
Code no.
AKS 41with Bargraph
Code no.
AKS 41-3 280 11.02 207 8.1 084H4053 084H4153
AKS 41-5 500 19.69 427 16.8 084H4055 084H4155
AKS 41-8 800 31.5 727 28.6 084H4058 084H4158
AKS 41-10 1000 39.37 927 36.5 084H4060 084H4160
AKS 41-12 1200 47.24 1127 44.4 084H4062 084H4162
AKS 41-15 1500 59.06 1427 56.2 084H4065 084H4165
AKS 41-17 1700 66.93 1627 64.1 084H4067 084H4167
AKS 41-22 2200 86.61 2127 83.7 084H4072 084H4172
AKS 41-30 3000 118.1 2927 115.2 084H4080 084H4180
Must be calibrated for CO2
AKS 41U is also available (see technical leafl et)Max. working pressure: 60 bar
Technical leafl et Industrial Refrigeration Valves for CO2 Applications
Danfoss A/S (RC-CM / MWA), 06 - 2003 RA0XA102 19
Ordering(cont.)
Please note the high pressure specials are generally available to order only and extended delivery times should be considered.
Delivery
Pressure transmitter
Type Pressure range Electrical connection Pressure connection Code no.
AKS 3000 PE 0...60 BARDIN 43650-A, PLUG PG9
G3/8 EN 837 060G1067
AKS 3000 PE 0...60 BARDIN 43650-A, PLUG PG9
1/4-18 NPT 060G1083
AKS 3000 PE 0...60 BARDIN 43650-A, PLUG PG9
7/16-20 UNF Flare 060G1329
AKS 3000 PE 0...60 BARDIN 43650-A, PLUG PG9
G1/2 EN 837 060G3631
Filter drier with Cu-plated steel connectors
Type Conn.in.
Code no. Conn.mm
Code no. Max. working pressure
DML 032sDML 032.5sDML 033sDML 034s
1/45/163/81/2
023Z4552023Z4553023Z4555023Z4556
68
1012
023Z4551023Z4553023Z4554023Z4557
42 bar (609 psi)
DML 052sDML 052.5sDML 053sDML 054sDML 055s
1/45/163/81/25/8
023Z4559023Z4560023Z4562023Z4564023Z4565
68
101216
023Z4558023Z4560023Z4561023Z4563023Z4565
42 bar (609 psi)
DML 082sDML 082.5sDML 083sDML 084sDML 085s
1/45/163/81/25/8
023Z4567023Z4568023Z4570023Z4572023Z4573
68
101216
023Z4566023Z4568023Z4569023Z4571023Z4573
42 bar (609 psi)
DML 162sDML 162.5sDML 163sDML 164sDML 165sDML 166sDML 167s
1/45/163/81/25/83/47/8
023Z4575023Z4576023Z4578023Z4580023Z4581023Z4582023Z4583
68
1012161922
023Z4574023Z4576023Z4577023Z4579023Z4581023Z4582023Z4583
42 bar (609 psi)
DML 303sDML 304sDML 305sDML 306sDML 307sDML 309s
3/81/25/83/47/811/8
023Z4585023Z4587023Z4588023Z4589023Z4590023Z4592
10121619 2228
023Z4584023Z4586023Z4588023Z4589023Z4590023Z4591
42 bar (609 psi)
DML 414sDML 415sDML 417sDML 419sDML 604sDML 606sDML 607sDML 609s
1/25/87/8
11/81/23/47/8
11/8
023Z4594023Z4595023Z4596023Z4598023Z4600023Z4601023Z4602023Z4604
1216222812192228
023Z4593023Z4595023Z4596023Z4597023Z4599023Z4601023Z4602023Z4603
42 bar (609 psi)
DML 757sDML 759s
7/811/8
023Z4605023Z4607
2228
023Z4605023Z4606
42 bar (609 psi)
Pressure controls
Pressure Type 1)
High pressure (HP) ResetContact system
PEDapprovals
Code no.
Regulating range bar
Differential∆pbar
LP/HP1/4 in.6 mmfl are
High KP 6W 8 42 4 10 Aut. SPDT EN 12263 060-5190
High KP 6B 8 42 Fixed 4 Man. SPDT EN 12263 060-51911) W = Wächter (pressostat), B = Begrenzer (pressure control with ext. reset), S = Sicherheitsdruckbegrenzer (pressure control with int. reset). A bellows rupture in inner bellows will cause the refrigeration plant compressor to stop. Max. working pressure: 46.5 bar
20 RA0XA102 Danfoss A/S (RC-CM / MWA), 06 - 2003
Technical leafl et Industrial Refrigeration Valves for CO2 Applications