table of contents · the skotch trifecta t4000f valve systems offer a superior alternative to...

Table of Contents

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1

Gas Valve Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2

Fabricated Body Gas Valve Systems . . . . . . . . . . . . . . . . . . . . . . . . .4T4000F Series

Cast Body Gas Valve Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12T4000C Series

Oil Valve Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18T500 Series - Igniter and Smaller Main Burners . . . . . . . . . . .26T1000 Series - Main Burners . . . . . . . . . . . . . . . . . . . . . . . . . .28T2000 Series - Mechanically Atomized Burners . . . . . . . . . . .32

Quote & Order Forms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .36

Terms & Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .39

Revision 1

For more information locate your local representativeat www.engvalves.com or contact:

Engineered Valves Group33 Centerville Rd.Lancaster, PA 17603Phone: (800) 366-1111

(717) 509-2200Fax: (717) 509-2336Website: www.engvalves.comE-mail: [email protected]

ITT Corporation, Engineered Valves Group has beenan innovator and producer of valves for over fiftyyears. These valves have gained extensive usage inmany industries including power generation, pulpand paper, refining, chemical process, pharmaceuti-cal/bioprocessing and pollution control.

Our Lancaster, Pennsylvania facility produces thecomplete line of SkotchÒ Trifecta valve systems.Starting with raw material machining, welding,assembly, final inspection and shipment, a commit-ment to quality is evident throughout the process.

Introduction

Unique SkotchÒ Trifecta valve systems are specifical-ly designed to provide safe and reliable shutoff forfuel gas and oil service. These valve systems havebeen utilized for over 25 years and are in service onboilers and burners around the world.

Because SkotchÒ Trifecta systems are custom builtfor each project, we are able to modify our stan-dard offerings to suit our customer’s various appli-cations. Whether it involves specialty materials orcomponents, SkotchÒ Trifecta valve systems willsimplify your installation and operation whileincreasing safety and reliability.

Revision 1

1

SkotchÒ Trifecta Gas Valve Systems

When you are burning flammable or fuel gases, youneed an automated shutoff system you can counton for safe, reliable performance – every time. Noleaks. No out-of-sequence operation.

And that’s where Engineered Valves Group canhelp. SkotchÒ valves are unique gas burner shutoffvalve systems designed and manufactured withinnovative technology.

The Skotch Trifecta T4000F valve systems offer asuperior alternative to conventional multiple-valvepackages. The Skotch Trifecta is a complete valve

system contained within a single housing. Fail-closed models, which include appropriate acces-sories, are Factory Mutual (FM) approved as auto-matic gas safety shutoff valves. Ruggedly construct-ed, the Trifecta system provides all the blocking andventing functions needed for safe automated gasburner operation.

Engineered Valves Group offers T4000 series valvesystems in a broad range of sizes to meet the needsof any capacity gas burner or igniter. When neces-sary, valves can be specially configured to addressspecific requirements for piping design and sup-port, and hazardous location classifications.

A safer, more reliable engineered system for automated burner shutoff of gas service in your plant.

Shown are eight T4300F (3 inch) Skotch Trifecta gas valve systems replacing the need for twenty-four inde-pendently actuated valves. Considerable installation time and space are reduced.

Revision 1

2

Skotch Trifecta Gas Valve Systems

Strings of separate valves or multiple valve mani-folds are frequently used to provide automatedburner shutoff in fuel gas applications. Sucharrangements often consist of a vent valve and twoblock valves, with each valve being driven by a sep-arate actuator.

Failure of all actuators to operate in sequence is aconcern. Sometimes a single operator is mechani-cally linked to drive both block valves in tandem. Insuch a configuration, obstruction or linkage prob-lems that affect one valve will prevent the otherfrom closing, so the advantage of using a doubleblock is lost.

In many systems, vent valves are direct solenoidoperated, with no provision for ensuring positiveclosure. The result can be continuous leakage intovent piping when the block valves are open.

Installation of the conventional three-valve systemcan require as many as nine different connections.The SkotchÒ Trifecta system requires only three sim-ple connections; inlet, outlet, and vent. In addition,the Trifecta automatically gives you the correct ventsize based on the recommendations of NFPA andIRI.

Engineered Valves Group created the T4000 seriesas a fully integrated system engineered for gasburner shutoff applications. The result is elimina-tion of performance problems and a device thatoffers continuous, reliable, trouble-free service inyour most critical applications.

A Look at the Problem

T4600F (6 inch) Skotch Trifecta gas valves are installed above the burner level in the hori-zontal position which reduces burner front clutter.

3

SkotchÒ Trifecta T4000F Series Gas

Features & Benefits:

• Provides all necessary block and vent functionsin a single integral unit

• Use of a single actuator ensures reliable in-sequence operation. Block valve closuresprings are independent for reliable closure

• Fabricated design allows for installation flexi-bility

• Compact design saves space

• All three valves provide ANSI/FCI 70-2 Class VIshutoff with over-travel and metal-to-metalback up seats

• Complies with NFPA and IRI’s recommendedgood design practices for vent port size

• Outlet and vent ports can be rotated at 90°increments, and the valves can be mounted inany orientation

• Built in test port to allow leakage testing whilevalve is in line

• No external linkage; rugged enclosure protectsall components

• Designed for in-line maintenance

Revision 1

The patented Skotch Trifecta T4000F series fabricat-ed body valve system is a safe, cost-effective, reli-able alternative to multiple valves and manifoldsfound in fuel gas systems. Used in applicationswhere double block and vent is required, theT4000F combines the function of two independentblock valves with a normally open vent valve in asingle, compact unit making it ideal for boilers, fur-naces and process heating equipment firing naturalgas, propane, and other fuel gas.

A single actuator mechanically opens the two blockvalves and closes the vent, assuring that the valvesoperate in sequence. Use of independent spring-to-close block valves ensures that obstructing onevalve does not prevent the other from closing. TheTrifecta valve system has no exposed linkage that

can be damaged and requires no adjustments forproper operation.

Because Skotch Trifecta valve systems are custombuilt for each application, we are able to modify ourstandard offerings to suit our customer needs.Installation flexibility is increased since the outletand vent ports can be rotated at 90° increments,and the valves can be mounted in any orientation.The valve system is completely self-contained andall necessary accessories are provided, includingposition indication switches and junction box.

Skotch Trifecta gas valve systems have been provenas a superior alternative to multiple valves systemsby decreasing installation space, time, and moneywhile increasing safety and reliability.

4

Actuator

Outlet Return Spring

Vent Connection

Outlet Block

Vent Post

Inlet

Inlet Block

Hollow Valve Stem

Outlet

Vent Cage

Inlet Return Spring

Closed Position

• Inlet block closed by inletreturn spring

• Outlet block closed by out-let return spring

• Vent is open through hol-low valve stem (path asmarked by orange arrows)

• No gas flow

Operating Sequence for the T4000F

Closed

Skotch Trifecta T4000F

Leak Test Port

5

Intermediate Position(The valve does not stop in thisposition)

• Outlet block open

• Vent cage positioned overvent post to completelyclose the vent

• Inlet Block valve still closed

• No gas flow

• The valve strokes throughthis position on its waytoward the open position


Intermediate

Actuator


Vent Connection

Outlet Block

Vent Post

Inlet

Inlet Block

Hollow Valve Stem

Outlet

Vent Cage

Inlet Return Spring

T4000F Skotch Trifecta

Leak Test Port

6


Operating Position

• Outlet block open

• Vent cage positioned overvent post to completelyclose the vent

• Inlet block valve open

• Gas flows from inlet tooutlet


Open

Actuator


Vent Connection

Outlet Block

Vent Post

Inlet

Inlet Block

Hollow Valve Stem

Outlet

Vent Cage

Inlet Return Spring

Leak Test Port

7


The two-inch (T4200F) through six-inch (T4600F)valve systems are fabricated design. As a result, out-let and vent connections as well as the junction boxcan be located at any point in 90° in relation to the

Specifying Configurations 2" through 6"

inlet connection. Listed here are standard orienta-tions from which to choose. Note: Vent and junction box should not be in thesame location.

T4000F Body Configurations

First: Identify Inlet/Outlet Orientation

Second: Select Vent Location

Third: Select Junction Box/Visual Indicator Location

Vent 0 Degreesfrom Inlet




Outlet 0 Degreesfrom Inlet




J Box 0 Degreesfrom Inlet




Outlet Outlet

Outlet

Inlet Inlet Inlet Inlet

Top ViewOutlet Port not Shown

Vent

Vent Vent

Vent

Top ViewOutlet Port not Shown

VisualIndicator

JunctionBox

VentPort

Outlet

8


Dimensional Information

Specifications for the T4000FDesign Pressure and Temperature:Max. operating pressure – 50 PSIGMax operating temperature – 180°FSizes & Weights:Series Line Size Vent size Weight*T4200F 2” 1” 137 lbsT4300F 3” 1 ¼” 240 lbsT4400F 4” 2” 265 lbsT4600F 6” 2 ½” 515 lbs*Approximate depending on options selectedEnd Connections:Inlet/Outlet: ANSI B16.5 Cl 150 Raised Face FlangeVent: ANSI B2.1 Female NPT, Sch 40 or 80 Spigot,Buttweld(CL 150 Raised face flange optional)Actuation:T4x05 – Fail in last positionT4x06 – Fail closed, FM approvedT4x07 – Fail closed, non-FM approvedPneumatic Supply: 60 to 120 PSIG clean, dry air(70 PSIG minimum for T4600F only)

Shutoff Classification:All ports soft seated with metal to metal backupNew valve: meets or exceeds ANSI/FCI 70-2

Class VIDurability: meets or exceeds FM 7400 standard

for Safety Shutoff Valves (SSOV)Ambient Temperature Rating:Standard: 140°F (FM approved)Optional: 180°F (non-FM approved)Electrical Rating:Standard – Nema 1, 3, 4, 13Optional – Nema 7, 9 (Class 1 Div 2 Gr B, C, D)Switch Rating: 10 Amps at 125 VACPilot Solenoid Voltages:110 VAC, 220 VAC 50/60 Hz 12, 24, 48, 125 VDCCv Ratings:T4200F – 80T4300F – 167T4400F – 245T4600F – 430

K

JH

Outlet ValveP.O.C. Switch(Norm Open)

Test PortPlug0.25 NPT

Air DiffuserPilot SolenoidValve

M

VentB

OutletA

InletA

L

D E F

C

Junction BoxValve TagSame Side asJunction Box

OpenLimitSwitch

Inlet ValveP.O.C. Switch

G

General Dimensions (Inches)

Valve Line Size A Vent Size B C D E F G H J K L MSeries

T4200F 2.00 R.F. Flange 1.00 FNPT 36.81 9.11 7.50 5.02 9.00 6.00 3.93 9.42 4.50 5.30T4300F 3.00 R.F. Flange 1.25 FNPT 40.79 8.69 10.12 5.53 11.00 7.50 5.54 9.63 4.00 5.30 T4400F 4.00 R.F. Flange 2.00 FNPT 40.98 9.31 11.27 6.10 11.00 7.93 5.63 9.63 4.00 5.30 T4600F 6.00 R.F. Flange 2.50 FNPT 54.38 10.06 15.00 8.13 13.50 11.00 7.38 11.42 4.25 5.88

General Dimensions (Metric)

Valve Series C D E F G H J K L MT4200F 935.0 231.4 190.5 127.5 228.6 152.4 99.8 239.3 114.3 134.6T4300F 1036.1 220.7 257.0 140.5 279.4 190.5 140.7 244.6 101.6 134.6T4400F 1040.9 236.5 286.3 154.9 279.4 201.4 143.0 244.6 101.6 134.6T4600F 1381.3 255.5 381.0 206.5 342.9 279.4 187.5 290.1 108.0 149.4

FM Approved for valves

which fail in the closed

position and incorporate

appropriate options.

Visual Indicator

T4000F Systems are covered under U.S. Patent No. 4,798,223 and other foreign patents.

9


2" through 6"The following charts depict the relationshipbetween flow (SCFH) and pressure drop (PSI) for 2inch through 6 inch Trifecta valves. Data is given atvarious inlet pressures (PSIG). Follow known flowup the chart until you intersect the known operat-ing pressure. Where the two lines intersect, look tothe left for the pressure drop.

Example: 3” valve system with 100,000 SCFH natu-ral gas flow operating at 15 PSIG inlet pressure thepressure drop will be 2.3 PSI. Selecting a 4” valvesystem with the same conditions will result in apressure drop of 1.0 PSI.

Estimated pressure drops are reported for the entireTrifecta double block and vent system.

Figures can be used to compare relative perform-ance of the various valve sizes. Please note that cal-culations do not take into effect external piping ele-ments, such as reducers, tees, and elbows. Whencomparing this data with that of other manufactur-ers, please ensure any comparison figure estimatesthe performance over two block valves closely-cou-pled and not just a single valve.

For other process conditions, calculations may beperformed using the Cv values noted in valve spec-ification data, or contacting the factory.Calculations are based on natural gas at 0.65 spe-cific gravity, 60 degrees F.

Flow Capacity Charts

Inlet Pressure T4200F (2") Cv=80 T4300F (3") Cv=167

T4400F (4") Cv=245 T4600F (6") Cv=430

Inlet Pressure

Inlet Pressure Inlet Pressure

Calculations are based on natural gas at 0.65 specific gravity, 60 degrees F.

10


Opening1. With the block valves closed and the vent open,gas enters the inlet port and is blocked by two flow-to-close plugs (the inlet and outlet block). To posi-tively prevent fuel leakage into an idle burner, thechamber between is vented to atmosphere throughthe hollow outlet valve stem. (Figure 1)

2. Pneumatic pressure at the top of the actuatorcylinder moves the piston downward, compressingthe outlet return spring and forcing the outlet blockopen. The cage slides down over the post until themachined surfaces inside the cage come in contactfirst with a spring-energized soft seal, and thenwith a metal back-up seat, closing the vent. (Figure2)

3. With the vent closed, the system continues tostroke, pushing the inlet block open, so that gasbegins to flow. A travel stop halts valve movementafter full stroke is achieved. (Figure 3)

Closing1. To close the valve and open the vent, pilot air isexhausted from the actuator. Return springs drivethe inlet and outlet valves toward their seats.(Figure 3)

2. As the inlet valve enters its seat ring, gas flow isisolated. The inlet block moves through its over-travel until contact is made with the back-up seat tofully close the inlet valve. (Figure 2)

3. As the outlet valve continues moving toward itsseat, the cage separates from the post, opening thevent. The outlet block enters the seat ring, isolatingthe vent from downstream piping. When the outletblock contacts the metal back-up seat, the system isfully closed. (Figure 1)

Principles of OperationFigure 1

Figure 2

Figure 3

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SkotchÒ Trifecta T4000C Series Gas

For larger igniters and smaller main burners, thepatented Skotch Trifecta T4000C series cast-bodyvalve system is a safe, cost-effective, reliable alter-native to the multiple valves and manifolds found infuel gas systems.

Used in applications where double block and vent isrequired, the T4000C combines the functions oftwo independent block valves with a normally openvent valve in a single, compact unit making it idealfor boilers, furnaces, and process heating equip-ment firing natural gas, propane, or other fuel gas.The unique design includes three ports: inlet, out-let, and vent. The cast steel body contains two valveplugs – an inlet and outlet block. The chamberbetween is open to vent through the hollow inletstem.

Flow to close inlet and outlet blocks are sized forfull flow to minimize pressure loss; increasing inletpressure forces the blocks tighter on their seats.Soft seals with over-travel and metal-to-metal backup seats assure positive ANSI/FCI 70-2 Class VI clo-sure. Proof-of closure (POC) switch is standard.

Advantages of using the T4000C valve system vs.conventional multiple valve and manifold setupsinclude:

· Compact for easier installation· Less maintenance and lower cost of ownership· Available Factory Mutual (FM) approved configu-

rations (fail closed only)· No out-of-sequence operation· Can be installed in any orientation

Because the T4000C valves operate using a singleactuator, problems such as out-of-sequence opera-tion, jamming, and maladjustment of linkage drivesystems are eliminated.

T4100C (1”)

T4150C (1.5”)

Revision 1

Shown with optional Proofof Open switch and externallimit switch option

12

Skotch Trifecta T4000C

Flow Capacity for the T4100C

Specifications for the T4100CDesign Pressure and Temperature:Max operating pressure: 50 PSIGTemperature rating: -20°F to 150°FShutoff Classification:All ports soft seated with metal to metal backupNew valve: meets or exceeds ANSI/FCI 70-2


for Safety Shutoff Valves (SSOV)Cv Rating: 14Inlet/Outlet Size: 1” Sch. 40 (Sch. 80 optional)End Connections:Inlet/Outlet: Sch. 40 or 80 Spigot; Butt Weld;

ANSI Class 150 Raised-Face Flange;Male NPT in Sch. 80; Socketweld

Vent: ANSI B2.1 FNPTPneumatic Supply: Clean, dry air at 60 to 120 PSIGFlow Direction: Left to Right or Right to Left. FieldreversibleOrientation: May be installed in any position.Construction Materials:Body: ANSI B16.34 compliant; cast carbon steel

per ASTM A216 Gr. WCB

Flanges: ASTM A479 Type 304, ASTM A108 1018Trim: ASTM Type 300 series stainless steelsSeals: Buna-N standard; Consult factory for

Viton optionsActuation:ElectropneumaticT4105C- Fail Last PositionT4106C- Fail Closed (Safe), FM ApprovedT4107C- Fail Closed, non-FM ApprovedSolenoid Supply Voltages:110 or 220 VAC, 50/60 Hz12, 24, 48 and 125 VDCSwitch Rating:Internal Switches - 7 Amps @ 120 VACExternal Switches - 10 Amps @ 125 VACSwitch/Solenoid Electrical Ratings:Location ClassificationStandard: Nema 1, 3, 4, 13Optional: Nema 7, 9 (Class 1 Div 2 Gr. B, C, D)(External switches only)Ingress ProtectionStandard: Nema 4Optional: Nema 4X (External switches only)Weight:Approximately 35 lbs depending on optionsselected

Inlet Pressure

The following chart depicts the relationshipbetween flow (SCFH) and pressure drop (PSI) for theT4100C Skotch Trifecta valve system. Data is givenat various inlet pressures (PSIG). Follow known flowup the chart until you intersect the known operat-ing pressure. Where the two lines intersect, look tothe left for the calculated pressure drop.

T4100C example: With 10,000 SCFH flow operatingat 15 PSI the calculated pressure drop will be 3.3PSI.

Calculations are based on natural gas at 0.65 spe-cific gravity, at 60° F.

13

T4000C Skotch Trifecta

Dimensional Specifications for the T4100C4.23(107)

PneumaticActuatorAssembly

4.19(106)

3.37(86)

11.06(281)

5.40(137)

3.38(86)12.00

(305)

VisualIndicator

ValveTag

ActuatorMountingSet ScrewTyp 3 Places

ValveBodyAssembly

Vent 3/4” FNPT

INLET OUTLET

16.28 (414)OverallHeight

Pilot SolenoidPneumatic Supply1/8” FNPT60-120 PSIG

Solenoid 1/2” FNPTWiring Connection

Internal Switch1/2” FNPT WiringConnection

Actuator/YokeMounting Surface

ITT SKOTCH

VENT

T4000C systems are covered under U.S. Patent No. 5,165,443 and other foreign patents.

Dimensions are inches (mm)

Externally Mounted Limit Switch Option

3.21(81.5)

9.96(253.0)

6.39(162.3)

Pilot SolenoidPneumatic Supply 60-120 PSIClean Dry Air PortConnection 1/8” NPT

Solenoid Can Be RotatedAbout Nipple Centerline

Solenoid Piping Connection1/2” FNPT

Visual Indicator

ActuatorMounting SetScrew 3X

Open Limit Switch(optional)

Proof of Closure Switch

1/2”ConduitPort

18.98(482.1)

Overall Height

Top of Actuator

FM Approved for valves which

fail in the closed position and

incorporate appropriate options.

14


The following chart depicts the relationshipbetween flow (SCFH) and pressure drop (PSI) for theT4150C and T4200C Trifecta valve systems. Data isgiven at various inlet pressures (PSIG). Followknown flow up the chart until you intersect theknown operating pressure. Where the two linesintersect, look to the left for the calculated pressuredrop.

Sizes & Weights:Series Line Size Vent Size Weight*T4150C 1.5” 3/4” 111 lbsT4200C 2.0” 1” 162 lbs* Approximate depending on options selectedEnd Connections:Inlet/Outlet: Sch. 40 or 80 Spigot; Butt Weld;

ANSI Class 150 Raised-Face Flange;Male NPT in Sch. 80; Socketweld

Vent: ANSI B2.1 FNPTDesign Pressure and Temperature:Max. operating pressure: 60 PSIGOperating temperature range: -20°F to 180°FAmbient Temperature Rating: 180°F Max.(Consult factory for higher requirements)Shutoff Classification:All ports soft seated with metal to metal backupNew valve: meets or exceeds ANSI/FCI 70-2


for Safety Shutoff Valves (SSOV)

Construction Materials:Body: ANSI B16.34 compliant; cast carbon steel

per ASTM A216 Gr. WCBFlanges: ASTM A479 Type 304, ASTM A108 1018Trim: ASTM Type 300 series stainless steelsSeals: Buna-N standard; Consult factory for

Viton optionsActuation:T4xx5 - Fail in Last PositionT4xx6 - Fail Closed (safe), FM ApprovedT4xx7 - Fail Closed, non-FM ApprovedPneumatic Supply: 60 to 120 PSIG Clean, Dry AirSolenoid Supply Voltages:110 VAC, 220 VAC 50/60 Hz12, 24, 48, 125 VDCSwitch / Solenoid Electrical Ratings:Location ClassificationStandard: Nema 1, 3, 4, 13Optional: Nema 7, 9 (Class 1 Div. 2 Gr. B,C,D)Ingress Protection:Standard: Nema 4Optional: Nema 4X Switch Rating: 10 Amps at 125 VAC

Flow Capacity for the T4150C and T4200CT4150C example: With 20,000 SCFH flow operatingat 15 PSI the calculated pressure drop will be 1.2PSI.

Calculations are based on natural gas at 0.65 spe-cific gravity, at 60° F.

Inlet Pressure

T4200C Cv = 78T4150C Cv = 45

Inlet Pressure

15

T4000C Skotch Trifecta

Model Pipe Run Vent Dim “A” Dim”B” Dim”C” Dim “D” Dim “E” Ø Dim “F”Size Connection

T4150C Base 1.5" 0.75" FNPT 31.8 (808) 9.8 (249) 22.0 (559) 18.3 (465) 4.6 (117) 5.6 (142)

T4150C w/ 2nd POC 1.5" 0.75" FNPT 36.9 937) 14.9 (378) 22.0 (559) 18.3 (465) 4.6 (117) 7.2 (183)

T4200C Base 2.0" 1.0" FNPT 33.5 (851) 10.1 (257) 23.4 (594) 21.8 (554) 5.4 (137) 7.1 (180)

T4200C w/ 2nd POC 2.0" 1.0" FNPT 39.0 (991) 15.5 (394) 23.4 (594) 21.8 (554) 5.4 (137) 8.3 (211)

*Dimensions are inches (mm)

Solenoid WiringConnection1/2” FNPT

Pneumatic ActuatorAssembly

VisualIndication

Switch WiringConnection1/2” FNPT

Switch WiringConnection1/2” FNPT

OptionalSecondPOCSwitch

“A”OverallHeight

“B”

“F”

Clear YokeLens Cover

Actuator MountingSurface

Valve BodyAssmebly

INLETSCH40

OUTLETSCH40

Valve Tag

Vent (FNPT)

“D”

“B”

“ØE”

“F”

“A”OverallHeight

7.0” DisassemblyClearance

Location forOptional ValveOpen Switch

PneumaticActuatorBreathingVent

SolenoidExhaustMuffler

Pilot SolenoidPneumatic Supply1/4” FNPT 60-120PSIG

5.0(127)

2.0” DISASSEMBLYCLEARANCE

“C”

“6.7”(170)

Optional SecondPOC Switch

8.4(214)

5.7(145)

Dimensional Specifications for the T4150C and T4200C

T4000C systems are covered under U.S. Patent No. 5,165,443 and other foreign patents.

FM Approved for valves which fail in the closed

position and incorporate appropriate options.

Proof of Closure(POC) Switch

16


Principles of OperationFigure 1 - Closed

Figure 2 - Intermediate

Figure 3 - Open

Inlet Outlet

Vent

Inlet Outlet

Vent

Inlet Outlet

Vent

Opening

1. Energizing the actuator extendsits output shaft, forcing the valve’soutlet stem down to open the outletblock and compress the Actuatorspring.2. As the system opens, a soft ventseal on the bottom of the outlet plugcontacts a flat surface on the insideof the inlet plug stem. The springenergized vent seal is compresseduntil a metal to metal backup seat ismade. At this point the outlet is openand the vent is fully closed. (Figure 2)3. The valve continues to travelthrough vent closure, driving theinlet plug out of its seat and com-pressing the inlet spring.4. When the inlet plug’s soft sealclears the seat ring, both blocks areopen, the vent is closed, and gasmoves from the inlet port to the out-let port. The valve stops at full open.(Figure 3)

Closing

1. For valve shutoff, the actuator isdeenergized, causing the valve’s twoindependent return springs to closethe block valves. (Inlet block springand actuator return spring)2. First, the inlet block closes, mak-ing first a soft seal, halting the flowof gas, and then over traveling tomake a metal to metal backup seal.Next, the vent opens, relievingdown-stream pressure. Finally, theoutlet block closes, making a softseat and then over traveling to makea metal to metal backup seat, isolat-ing the vent from the burner.3. With the inlet and outlet blocksclosed and the vent open, any poten-tial leakage past the inlet valveescapes to vent through the hollowinlet stem. This positively ensures noleakage into the burner. (Figure 1)

17

SkotchÒ Trifecta Oil Valve System

A compact high-performance valve system for firing and purg-ing oil-fired burners and igniters.

Need a reliable, cost-effective solution for firing andpurging oil burners and igniters? Engineered ValvesGroup has the answer. Our Trifecta valve systemsoffer a number of advantages over conventionalvalves, and work with all types of burners and ignit-ers - including steam, air, or mechanically atomized.

The result is elimination of performance problemsand a device that offers continuous, reliable, trou-ble free service in your most important applications.

Strings of separate valves and packaged multiplevalve systems are commonly used with oil burnersand igniters. Problems inherent in such systemsinclude the possibility of out-of-sequence opera-tion, atomizing media contamination, leakage, orflame out. Additionally, multiple valve packagesrequire more space and may be costly to install andmaintain. Burner management logic may be morecomplex, increasing the cost of the system.

The Skotch Trifecta is a valve system with all com-ponents housed within a single valve body.Conventional systems require at least three valvesand actuators to accomplish what we provide witha single valve system. We perform all key functionsincluding fuel sequencing, atomizing and purgingof the down stream piping. They are designed tocomply with NFPA and IRI guidelines. This uniquearrangement has been proven in years of troublefree service on installations worldwide.

Engineered Valves Group offers a complete line ofSkotch valves for every application. In retrofits, eachmodel can be configured to match the valve oper-ating logic of existing burner management systems.These valve systems are compatible with any typefuel oil. We have installations utilizing #2, BunkerC, Crude, and waste oils.

When incorporating appropriate options/acces-sories, models T1003, T1006, and T506 are FactoryMutual approved for use as a “combination oil safe-ty shut off, atomizing, and purge valve.”

The Skotch Trifecta is a complete valve system that pro-vides oil shutoff, purging and atomizing in a single valve.

Revision 1



18

Skotch Trifecta Oil Valve Systems

• Designed to comply with NFPA and IRI guide-lines

• Purge sequence is an integral part of oil valveclosure, allowing almost instantaneous switch-ing from firing to purge modes

• Prevents out-of-sequence operation, eliminat-ing contamination of the atomizing or purgingmedia

• Only four piping connections required to install

• Class VI soft seat and metal-to-metal back upseat on the oil side

The Skotch Trifecta Valve Systemsoffer these proven benefits:

FM Approved for valves which

fail in the closed position and

incorporate appropriate options.Skotch Valve shown in the purge (or scavenge) mode.

• Simplified design – no precision adjustmentsrequired

• Flexibility in designs to accommodate eitherretrofits or new installations

• Compact unit takes less space

• Quick and easy installation reduces time andlabor cost

• Unit can be completely disassembled in-line forease of maintenance

• Oil valve over travel allows positive proof of clo-sure

• Models that fail close and contain appropriateaccessories are Factory Mutual approved

19

Oil Valve Systems Skotch Trifecta

Closed Position• The atomizing valve plug is held

against the atomizing valve seatby the actuator return spring,blocking the flow of the atomiz-ing media.

• The oil valve plug is held againstthe oil valve seat by the oil valvereturn spring located in the lowerbox, blocking the flow of oil. Theflow-to-close plug valve is seatedeven tighter by the oil pressureform the oil inlet.

Operating Sequence for the T1000 and T500

Actuator ReturnSpring

Atomizing Inlet

Oil Inlet

Atomizing Valve Seat

Atomizing Valve Plug

Oil Valve Return Spring

Atomizing Outlet

Oil Outlet

Oil Valve Seat

Oil Valve Plug

20



Purge ActuatorPressurized

Atomizing Inlet

Purge Seat

Atomizing Stem

Oil Inlet

Oil Valve Stem

Purge Position• The purge actuator pushes the

atomizing stem down from theclosed position to a mechanicalstop position.

• The atomizing medium flowsfrom the atomizing inlet to theatomizing outlet and oil outlet(scavenge/purge).

• No oil flow occurs since the atom-izing stem has not yet contactedthe oil valve stem.

Atomizing Outlet

Oil Outlet

21



Fire ActuatorPressurized

Atomizing Inlet

Purge Seat

Atomizing Stem

Oil Inlet

Oil Valve Stem

Oil Valve Plug

Fire Position• The fire actuator pushes the

atomizing stem down and con-tacts the oil valve stem, pushingthe plug out of its oil seat ring.

• When the oil stem begins move-ment, the oil valve proof of clo-sure switch deactivates, prior tothe port actually opening. Thesoft seal is still made. When theplug of the oil valve stem clearsthe oil soft seal, oil flow begins.

• The bottom side of the atomizingvalve plug seats on the purgeseat, stopping the purge flow andprovides solid separation betweenthe oil and atomizing medium.

Atomizing Outlet

Oil Outlet

22


Principles of OperationClosed• The atomizing valve plug is held against the atomizing valve seat

by the actuator return spring, blocking the flow of the atomizingmedia. (Figure 1)

• The oil valve plug is held against the oil valve seat by the oil valvereturn spring located in the lower box, blocking the flow of oil.The flow to close plug valve is seated even tighter by the oil pres-sure from the oil inlet. (Figure 1)

• The oil valve plug and seat consist of two independent seals. Asoft seal provides the required overtravel for positive proof ofclosure indication and class VI shutoff. A flow-to-close metal tometal seal provides a backup to the soft seal for further safetyand Class IV shutoff. (Figure 1)

Purge (Scavenge)• The purge actuator pushes the atomizing stem down from the

closed position. (Figure 2)

• The atomizing medium flows from the atomizing inlet throughthe open atomizing valve seat to the atomizing outlet. It alsopasses through the open purge seat to the oil outlet providing afull purge from the center of the valve out.

• The purge flow purges the valve and downstream piping of resid-ual fuel during burner shutdown. It can also be used for down-stream warm up when used before light off.

• There is no oil flow since the oil valve stem is still fully seated inthe oil valve seat. The oil valve proof of closure switch providespositive indication of oil valve closure.

Fire• The fire actuator pushes the atomizing stem down. The atomiz-

ing stem contacts the oil valve stem, pushing the plug out of itsoil seat ring.

• The bottom side of the atomizing valve plug seats on the purgeseat, stopping the purge flow. When the plug of the oil valvestem clears the oil soft seat, oil flow begins. (Figure 3)

• When the oil stem begins movement, the oil valve proof of clo-sure switch deactivates, prior to the port actually opening. Thesoft seal is still made.

• The full force of the fire actuator pushes the atomizing valve plugagainst the purge seat, providing solid separation between theoil and atomizing medium.

Figure 1

Figure 2

Figure 3



23


1 2 3

Pneumatic Actuation/ Limit Switches

Valve ClosedLimit Switch

Valve OpenLimit Switch



ActuationThe T505/T506/T507, T1005/T1006/T1007, andT2005/T2006/T2007 valves use a spring-return tan-dem cylinder for electropneumatic operation withan air supply of 70 to 120 PSI as follows:

• Pressurizing the upper cylinder (Position 2)strokes the Trifecta valve 1/4” to the purge posi-tion. No adjustment is needed to achieve prop-er purging.

• Pressurizing the lower cylinder (Position 3)strokes the valve until the purge plug contactsthe purge seat, putting the system in the fireposition.

• Exhausting both cylinders (Position 1) allowsthe actuator spring to return the valve to theclosed position. Two pilot solenoid valves con-trol cylinder pressurization.

• Model T505/T1005/T2005 uses dual-coilmomentary contact solenoids for energize-to-trip, fail- in-last-position operation.

• Model T506/T1006/T2006 uses single-coil,spring return maintained contact solenoids forde-energize to trip, failed-closed operation, andis Factory Mutual approved, when incorporat-ing appropriate accessories.T507/T1007/T2007are non-FM.

Valve Limit Switches1. Position (1) shows valve in closed position.

Valve closed limit switch is activated.

2. Position (2) shows valve in purge position.Neither the valve closed limit switch or valveopen limit switch are activated.

3. Position (3) shows valve in fire position. Valveopen limit switch is activated.

Note: Additionally, Oil “Proof of Closure (POC)”switch is indicated from oil valve stem and wouldbe activated while in position (1). See section ofmain oil stem below.

PurgeSolenoidEnergized

FireSolenoidEnergized

Closed Purge Fire

Oil Valve Stem

Oil ValveReturn Spring

24

POC Switch


Specialty ComponentsITT Corporation, Engineered Valves Group has beenan industry leader in providing customized solu-tions to meet the changing requirements of ourcustomers. Since Skotch Trifecta systems are cus-tom built for each project, we are able to accom-modate most non-standard requests.

Oil valve rack systemsOil valve rack systems provide greater savings ininstallation time and money. The Skotch valve sys-tem is attached to the free-standing rack such thatthe height can be adjusted in the field. The base isdrilled for bolt mounting or welding to decking.Engineered Valves Group can provide strainers,manual stuf-off valves, gauges, check valves, andrecirculation valves as required. As a result the fullsystem can be hydrotested and all welds verified atthe factory.

In addition to rack systems, Engineered ValvesGroup can provide specialty materials to suit yourspecific needs. Specialty components such as prox-imity switches, feedback position transmitters andcomponents utilized in corrosive and hazardousconditions are also available.

Cooling Steam OptionA cooling steam option provides drilled orifices inthe atomizing seat ring providing a constant cool-ing steam (or air) flow requirement while a burneris not in service. While the valve is closed a smallamount of atomizing media flows through theatomizing and oil outlets, as shown in the view tothe right. Our patented cooling steam option was aresult of a custom-engineered design that removedthe need for an extra valve and/or operator inter-face.

Please consult our factory for your custom-engi-neered design application.

Custom Engineered Solutions

25

SkotchÒ Trifecta T505/T506/T507 Oil

System DescriptionThe Skotch Trifecta is a valve system with all componentshoused within a single valve body. Conventional systemsrequire at least three valves and actuators to accomplishwhat we provide with a single valve system. We performall key functions including fuel sequencing, atomizing,and purging of the down stream piping.

Model T505 is a fail-in-last-position precision-builtswitching valve system, while Models T506/T507 aredesigned to fail in the closed position. Both offerTrifecta’s proven performance advantages over separatevalves or packaged multiple valve systems, including:

• Prevention of out-of-sequence operation, eliminatingcontamination of the atomizing or purging media.

• Purge sequence is an integral part of our valve clo-sure, allowing almost instantaneous switching fromfiring to purging modes.

ApplicationThe compact T500 valves are used with oil fired ignitersand smaller main burners requiring steam or air atom-ization. Both models are completely self contained, andall necessary accessories are provided, including positionindication switches and junction box.

When incorporating appropriate options/accessories,model T506 is Factory Mutual approved for use as a“combination oil safety shutoff, atomizing, and purgevalve.”

Pneumatic ActuatedIgniter and Smaller Main Oil Burner Systems

Revision 1

T505/T506/T507 Valve Systems T505/T506/T507 Valve Systems

26

Skotch Trifecta T505/T506/T507

Dimensional Specifications for theT505/T506/T507

Specifications for the T505/T506/T507Design Pressure and TemperatureStandard Valve: 300 PSIG @ 450°FMaximum Differential Pressure:Equal to design ratingSizes: ½”End Connections:Sch. 40 or 80 Spigot, Butt Weld, Male NPT in Sch. 80, SocketweldFlow Orientation:Left-to-right or right-to-leftField reversible (consult factory)Failure Mode:Closed or last position upon electric or pneumaticfailure.Shutoff Classification:Per ANSI/FCI 70-2Atomizing seat – Meets or exceeds CL. IVPurge seat – Meets or exceeds CL. IVFuel seat – Meets or exceeds CL. VITotal Stroke:7/8” for both modelsOperating Speed:Opening – Approximately 0.6 seconds, maximumdetermined by speed control option. Closing – Oil valve closure in approximately 1 sec-ond, full closure in approximately 2 seconds

Ambient Temperature Rating:Standard: 140°F (FM approved)Optional: 180°F (non-FM approved)Electrical Rating:Standard: Nema 1, 3, 4, 13Optional: Nema 7 (Class 1 Div 2, consult factory)Switch Rating: 10 Amps at 125 VACSolenoid Supply Voltages: 110 VAC, 220 VAC, 50/60 Hz12, 24, 48, 125 VDCAir Supply Pressure: 70-120 PSIG – Clean, dry airWeight:Approximately 42 lbs per valve assembly Cv Ratings:Atomizing Cv – 4.2Purge Cv* – 1.8Fuel Cv – 4.0

*Note Total Atomizing flow in Purge position islimited to the atomizing Cv.

2.00 Actuator(50.8) Removal

26.14(664.0)

Junction Box

AtomizingOutlet

AtomizingInlet

FuelOutletFuel

Inlet

2.94(74.7)

6.25(158.8)

4.64(117.9)

BoxRemoval

15.00(381.0)

7.50(190.5)

Visual Indicator


10.52(267.2)

6.00(152.4)

SolenoidAssembly

Pneumatic Supply70-120 PSIGClean Dry Air0.25 FNPT

Tandem CylinderActuator


Main ValveAssembly

Oil Valve Proof ofClosure Switch

FireSolenoid

Energizeto Open

PurgeSolenoid

SolenoidAssembly

Solenoid DetailFail Closed

6.88(174.8)

1.66 (42.2)

15.67(398.0)




appropriate options.Dimensions are inches (mm)

27


System DescriptionThe Skotch Trifecta is a valve system with all componentshoused within a single valve body. Conventional systemsrequire at least three valves and actuators to accomplishwhat we provide with a single valve system. We perform allkey functions including fuel sequencing, atomizing andpurging of the down stream piping.

Model T1005 is a fail in last position precision switchingvalve system, while Models T1006 and T1007 are designedto fail in the closed position. Both offer Trifecta’s provenperformance advantages over separate valves or packagedmultiple valve systems, including:


• Purge sequence is an integral part of our valve closure,allowing almost instantaneous switching from firing topurging modes.

ApplicationThe T1005/T1006/T1007 valves are used with oil fired burn-ers requiring steam or air atomization. All models are com-pletely self contained, and all necessary accessories are pro-vided, including position indication switches and junctionbox.

When incorporating appropriate options/accessories, modelT1006 is Factory Mutual approved for use as a “combina-tion oil safety shutoff, atomizing, and purge valve.”

Pneumatic Actuated Main Burner Oil Valve Systems

Revision 1


28



Specifications for the T1005/T1006/T1007Design Pressure and TemperatureStandard Valve: 300 PSIG @ 450°FOptional: 600 PSIG (fuel) @ 450°FMaximum Differential Pressure:Equal to design ratingSizes: ¾” or 1”End Connections:Sch. 40 or 80 Spigot, Butt Weld, ANSI CL. 300Raised Face Flange, socketweld,Male NPT in Sch. 80Flow Orientation:Left-to-right or right-to-leftField reversible (consult factory)Failure Mode:Closed or last position upon electric or pneumaticfailure.Shutoff Classification:Per ANSI/FCI 70-2Atomizing seat – Meets or exceeds CL. IVPurge seat – Meets or exceeds CL. IVFuel seat – Meets or exceeds CL. VITotal Stroke: 1 ¼” for both modelsOperating Speed:Opening – Approximately 0.8 seconds, maximum

determined by speed control.Closing – Oil valve closure in approximately 1second, full closure in approximately 2 secondsAmbient Temperature Rating: Standard: 140°F (FM approved)Optional: 180°F (non-FM approved)Electrical Rating:Standard: Nema 1, 3, 4, 13Optional: Nema 7 Class 1 Div 2Nema 7 Class 1 Div 1 (consult factory)Switch Rating: 10 Amps at 125 VACSolenoid Supply Voltages: 110 VAC, 220 VAC, 50/60 Hz12, 24, 48, 125 VDCAir Supply Pressure: 70-120 PSIG – Clean, dry airWeight: Approximately 85 lbs per valve assem-bly Cv Ratings:Atomizing Cv – 10.0Purge Cv* – 3.5Fuel Cv – 10.0*Note Total Atomizing flow in Purge position islimited to the atomizing Cv.

35.69(906.5)

2.00 Minimum Clearance(50.8) for Actuator Removal

Atomizing Inlet

Fuel Inlet Fuel Outlet

Atomizing Outlet

4.18(106.2)

22.25(565.2)

VisualIndicator

YokeLock Nut

Junction Box

Main ValveAssembly

16.25(412.8)

5.00(127.0)

8.74(222.0)

Oil Valve Proofof Closure“POC”

11.52(292.6)

Closed LimitSwitch

Open LimitSwitch


Exhaust

Inlet 0.25” FNPT70-120 PSIGClean Dry Air

Energizeto Open

PurgeSolenoid

FireSolenoid

Energizeto Open


MinimumClearance for Box Removal FM Approved for valves





29


Electrohydraulic Actuated Main Burner Oil Valve Systems

System DescriptionThe Skotch Trifecta is a valve system with all componentshoused within a single body utilized with oil fired burnersrequiring steam or air atomization. Model T1001 is a fail inlast position precision built switching valve system, whileModels T1003 and T1004 are designed to fail in the closedposition. Both offer Trifecta’s proven performance advan-tages over separate valves or packaged multiple valve sys-tems, including:


• Purge sequence is an integral part of our valve closure,allowing almost instantaneous switching from firing topurging modes.

ActuationThe T1001/T1003/T1004 valves use an electrohydraulic actu-ator requiring only 110VAC or 220VAC power. Operation isas follows:

Revision 1


• Signaling the valve to move from fire to purgeor closed causes two dump valves to open,relieving hydraulic pressure and allowing aspring to move the valve stem up.

• Model T1001 uses normally closed dump valvesfor energize to trip, fail in last position opera-tion.

• Model T1003 uses normally open dump valvesfor deenergize to trip, fail closed operation. Thisversion is Factory Mutual approved, whenincorporating appropriate accessories.

• Signaling the valve to move from closed topurge or fire causes an internal pump to pres-surize a cylinder and push the atomizing valvestem down.

• A force limit stops the actuator when the atom-izing valve contacts the purge seat and thevalve is in the fire position.

30



Specifications for the T1001/T1003/T1004Design Pressure and TemperatureStandard Valve: 300 PSIG @ 450° FOptional: 1100 PSIG (fuel) @ 450° FMaximum Differential Pressure:Equal to design ratingSizes: ¾” or 1”Other sizes available on requestEnd Connections:Sch. 40 or 80 Spigot Weld, Butt Weld, ANSI CL. 300Raised Face Flange, socketweldMale NPT in Sch. 80Flow Orientation:Left-to-right or right-to-leftField reversible (consult factory)Failure Mode: Closed or last positionShutoff Classification:Per ANSI/FCI 70-2Atomizing seat – Meets or exceeds CL. IVPurge seat – Meets or exceeds CL. IVFuel seat – Meets or exceeds CL. VITotal Stroke: 1 ¼” for both models

Operating Speed:Opening – Approximately 25 secondsClosing – Oil valve closure in approximately 1 sec-ond, full closure in approximately 2 secondsAmbient Temperature Rating:Standard: 140°F (FM approved)Optional: 180°F (non-FM approved)Electrical Rating:Nema 4 and 13 standardSwitch Rating:Auxiliary Switches SPDT – 15 Amps @ 125 VACProof of Closure Switch – 10 Amps @ 125 VACVoltages: 110 VAC, 220 VAC, 50/60 HzWeight: Approximately 85 lbs per valve assemblydepending on options selected.Cv Ratings:Atomizing Cv – 10.0Purge Cv* – 3.5Fuel Cv – 10.0*Note Total Atomizing flow in Purge position is lim-ited to the atomizing Cv.

7.44(189.0)

4.94(125.5)

4.28 Minimum Clearance(108.7) for Cover Removal

4.28(108.7) Minimum Clearance forCover Removal

ElectroHydraulicActuator

Yoke Lock Nut

Main ValveAssembly

VisualIndicator

Atomizing Inlet

Fuel Inlet Fuel Outlet

Atomizing Outlet

5.00 Minimum (127.0) Clearancefor Box Removal

4.18(106.2)

8.74(222.0)

16.25(412.8)

Oil Valve Proofof Closure “POC”

10.84(275.3)

4.00(101.6)

32.63(828.8)

2.00 Minimum(50.8) Clearance forActuator Removal






31


System DescriptionThe Skotch Trifecta is a valve system with all com-ponents housed within a single valve body.Conventional systems require multiple valves andactuators to accomplish what we provide with asingle valve system. We perform all key functionsincluding fuel sequencing and purging of the downstream piping.

An extension of the successful T1005/T1006/T1007series, the T2000 valve system provides the sameproven performance advantages over separatevalves, or packaged multiple valve systems, includ-ing:

• Prevention of out-of-sequence operation, elimi-nating contamination of the purging media.

• Purge sequence is an integral part of our valveclosure, allowing almost instantaneous switch-ing from firing to purging modes.

ApplicationThe T2000 valve systems are used with oil firedburners requiring straight Mechanical Atomization.These valve systems are completely self contained,and Engineered Valves Group provides all necessaryaccessories, such as indicator switches and junctionboxes. While the straight mechanically atomizedsystem is shown here, we can also provide systemsfor Wide Range Tip Return systems employingreturn and recirculation of the oil. Please consultfactory for more information.

Mechanically Atomized Main Burner Oil ValveSystem with Pneumatic Actuator

Revision 1

T2005/T2006/T2007 Valve Systems T2005/T2006/T2007Valve Systems

32



Specifications for the T2005/2006/2007Design Pressure and TemperatureStandard Valve: 300 PSIG @ 450°FOptional: 600 PSIG (fuel) @ 450°FMaximum Differential Pressure:Equal to design ratingSizes: ¾” or 1”End Connections:Sch. 40 or 80 Spigot, Butt Weld, ANSI CL. 300Raised Face Flange, Socketweld,Male NPT in Sch. 80Flow Orientation:Left-to-right or right-to-leftField reversible (consult factory)Failure Mode:Closed or last position upon electric or pneumaticfailure.Shutoff Classification:Per ANSI/FCI 70-2Atomizing seat – Meets or exceeds CL. IVPurge seat – Meets or exceeds CL. IVFuel seat – Meets or exceeds CL. VITotal Stroke: 1 ¼” for both models

Operating Speed:Opening – Approximately 0.8 seconds, maximumdetermined by speed control.Closing – Oil valve closure in approximately 1 sec-ond, full closure in approximately 2 secondsAmbient Temperature Rating: Standard: 140°F (FM approved)Optional: 180°F (non-FM approved)Electrical Rating:Standard: Nema 1, 3, 4, 13Optional: Nema 7, Class 1 Div 2Nema 7, Class 1 Div 1 (consult factory)Switch Rating: 10 Amps at 125 VACSolenoid Supply Voltages: 110 VAC, 220 VAC, 50/60 Hz12, 24, 48, 125 VDCAir Supply Pressure: 70-120 PSIG – Clean, dry airWeight: Approximately 85 lbs per valve assembly Cv Ratings:Purge Cv – 3.5Fuel Cv – 10.0

35.69(906.5)

2.00 Minimum Clearance(50.8) for Actuator Removal

Purge Inlet

Fuel Inlet

Outlet

5.53(140.5)

22.25(565.2)

VisualIndicator

YokeLock Nut

Junction Box

16.25(412.8)

5.00(127.0)

8.06(204.7)

11.52(292.6)

Closed LimitSwitch

Open LimitSwitch


Exhaust

Inlet 0.25” FNPT70-120 PSIGClean Dry Air

Energizeto Open

PurgeSolenoid

FireSolenoid

Energizeto Open


MinimumClearance for Box Removal

Oil Valve Proofof Closure“POC” 9.43

(239.5)


33

Mechanically Atomized Main Burner Oil ValveSystem with Electrohydraulic Actuator


System DescriptionThe Skotch Trifecta is a valve system with all com-ponents housed within a single valve body.Conventional systems require multiple valves andactuators to accomplish what we provide with asingle valve system. We perform all key functionsincluding fuel sequencing and purging of the downstream piping.

An extension of the successful T1005/T1006/T1007series, the T2000 valve system provides the sameproven performance advantages over separatevalves, or packaged multiple valve systems, includ-ing:

• Prevention of out-of-sequence operation, elimi-nating contamination of the purging media.

• Purge sequence is an integral part of our valveclosure, allowing almost instantaneous switch-ing from firing to purging modes.

ApplicationThe T2000 valve systems are used with oil firedburners requiring straight Mechanical Atomization.These valve systems are completely self contained,and all necessary accessories are provided, such asindicator switches and junction boxes. While thestraight mechanically atomized system is shownhere, we can also provide systems for Wide RangeTip Return systems employing return and recircula-tion of the oil. Please consult factory for more infor-mation.

Revision 1


34



Specifications for the T2001/T2003/T2004Design Pressure and TemperatureStandard Valve: 300 PSIG @ 450°FOptional: 600 PSIG (fuel) @ 450°FMaximum Differential Pressure:Equal to design ratingSizes: ¾” or 1”End Connections:Sch. 40 or 80 Spigot, Butt Weld, ANSI CL. 300Raised Face Flange, Socketweld,Male NPT in Sch. 80Flow Orientation:Left-to-right or right-to-leftField reversible (consult factory)Failure Mode:Closed or last position upon electric or pneumaticfailure.Shutoff Classification:Per ANSI/FCI 70-2Atomizing seat – Meets or exceeds CL. IVPurge seat – Meets or exceeds CL. IVFuel seat – Meets or exceeds CL. VITotal Stroke: 1 ¼” for both models

Operating Speed:Opening – Approximately 25 secondsClosing – Oil valve closure in approximately 1 sec-ond, full closure in approximately 2 secondsAmbient Temperature Rating: Standard: 140°F (FM approved)Optional: 180°F (non-FM approved)Electrical Rating:Standard: Nema 4 and 13Switch Rating: 10 Amps at 125 VACSolenoid Supply Voltages: 110 VAC, 220 VAC, 50/60 Hz12, 24, 48, 120 VDCAir Supply Pressure:70-120 PSIG – Clean, dry airWeight: Approximately 85 lbs per valve assembly Cv Ratings:Purge Cv – 3.5Fuel Cv – 10.0

7.44(189.0)

4.00 Cover(101.6) Removal

Yoke Lock Nut

Terminal Plate/ Pressure SwitchCover

VisualIndicator

Purge Inlet

Fuel Inlet

Outlet

8.06(204.7)

16.25(412.8)

Oil Valve Proofof Closure “POC”

2.00 Minimum Clearance (50.8) for Actuator Removal


4.94(125.5)

5.53(140.5)

32.86(834.6)

ElectrohydraulicActuator

Auxillary SwitchEnclosure

10.84(275.3)


5.00 Minimum (127.0) Clearancefor Box Removal

9.43(239.5)


35

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