pilot operated pressure relief valvesasme code section viii for air, gas, vapor, and liquid...

Series 3800Pilot Operated Pressure Relief Valves

Pilot Operated Pressure Relief Valves

494C

Table of ContentsIntroduction .............................................................................. 2

Principles of Operation .............................................................. 3

Main Valve Advantages/Bill of Materials ................................. 4-5

Pilot Control Valve Advantages/Bill of Materials ..................... 6-7

Selection Table for API Nozzle Design .................................... 8-9

Selection Tables for Full Port and Dual Outlet Designs ............ 10

Air Capacity Tables ............................................................. 11-12

Natural Gas Capacity Tables ............................................... 13-14

Water Capacity Table ............................................................... 15

Numbering System ........................................................... 16-17

Sizing Information ................................................................... 18

Back Pressure Sizing Factor Kb .............................................. 18

Accessories ............................................................................. 19

Dimensions and Weights for API Nozzle Design ................ 20-21

Dimensions and Weights for Full Port Design ......................... 22

Other Farris Engineering Valves .............................................. 23

Piloting the Way to Precision Control

All Series 3800 valves are actuated by our PCF3, HPCF3 or PCL pilot controls with 316 stainless steel primary components as standard. The main valve body is carbon steel with 316 stain-less steel trim. The main valve is also available in a full 316 stainless steel “S4” option, a NACE standard MR0175 “S7” option, and a cryogenic service valve.

Viton® soft goods are standard in both pilot control and main valves. Buna N, Neoprene, ethylene propylene, silicone and Tefl on® soft goods are available as options; contact Factory for more information.

2

The innovative, integrally cast, fl anged semi-nozzle valves of Series 3800 are provided as self-contained units actuated by the snap-acting, non-fl owing PCF3 (standard), HPCF3 (high pressure), and PCL (liquid service) pilot valves. All valves in the series are certifi ed under Section VIII of the ASME Code for Air, Gas, Vapor and Liquid Service.

Available in API Orifi ces D through T as well as full bore mod-els, Series 3800 valves are provided with raised face or ring joint inlet fl anges from 150# through 2500# ANSI classes with 150# and 300# outlets. Set pressures range from 15 to 6170 psig with temperatures of -450°F to 450°F for standard options. Contact Factory about higher temperature and pressure requirements.

Viton is a registered trademark of DuPont Dow Elastomers

Tefl on is a registered trademark of the DuPont Company

Principles of Operation

Closed Valve Position: as the system approaches set pressure, the pressure pick-up transmits the pressure from the inlet of the main valve through the pilot control and into the dome of the main valve. This pressure acts upon the top of the piston in the dome, holding the piston fi rmly against the seat on the nozzle in the main valve. The surface area of the piston in the dome of the main valve is greater than the seat area, so the greater the system pressure, the greater the force holding the piston on the main valve seat. As a result, the pilot operated relief valve gets tighter as the system pressure approaches set pressure.

Relieving Cycle: at the point that the inlet pressure, acting on the surface area of the pilot control disc, overcomes the spring force in the pilot valve, the pilot valve lifts. The PCF3 is a non-fl owing pilot control valve. As the seat assembly in the pilot control begins to lift, it seals off the fl ow of pressure to both the vent and the main valve dome. At the same time, the pressure in the dome is released through the pilot vent. Since the pressure in the dome has been released, the system pres-sure acting on the bottom of the piston will lift the piston and will relieve system overpressure.

Re-Closing Cycle: at the point where the system pressure blows down, the spring force in the pilot valve overcomes the force of system pressure acting on the pilot control seat as-sembly. The pilot control redirects system pressure back into the main valve dome, closing the main valve. Blowdown can be precisely adjusted externally by raising and lowering the blowdown adjuster position in the pilot valve.

Operating AdvantagesBubble-tight closer to set pressure: Series 3800 valves oper-ate bubble tight at higher operating pressure to set pressure ratios, allowing operators to run very close to the system’s maximum allowable working pressure. While protecting the system from overpressure, Series 3800 allows maximum product throughput, increased system profi tability, and reduced fugitive emissions.

Unaffected by back pressure: unlike a direct spring loaded valve, the pilot operated valve’s set pressure is not affected by back pressure. The pilot control valve, isolated from the infl uence of downstream pressure, controls the main valve’s opening and closing.

3

Closed Position

Relieving Position

4

Main Valve: Advantage Farris

Convertible Design: the unique convertible design mini-mizes the number of components and maximizes their inter-changeability, reducing parts inventories and overall costs.

Convertible Nozzle: threaded convertible nozzles can be removed and replaced easily without factory service. They can be installed with common tools while the valve is in line, saving time and money.

Fewer Internal Components: the valve design requires no lift stops and the main valve opens fully at set pressure. The orifi ce area is controlled by the nozzle, eliminating the need for additional parts to restrict lift.

One Piece Body: integrally cast fl anges assure the highest material integrity and eliminate problems that may occur with welding.

Full 316 Stainless Steel Trim: this trim is standard and includes nozzle, piston, retainer and guide for long and versa-tile service life.

Main Valve Soft Seat: unlike metal seated valves which require costly machining and lapping procedures, the main valve soft seat is easily maintained and repaired.

Less Weight, Lower Profi le: system pressure provides the seating force in pilot operated relief valves so pilot valves are smaller in size and weight than direct spring loaded valves.

Convertible to NACE Service: with the high quality of construction materials, conversion for NACE Service to MR0175 is simple.

Convertible to Cryogenic Service: easy conversion for low temperature applications.

Full Bore Option: the full bore option provides maximum capacity per inlet size.

Built in conformance to ASME Code Section VIII for Air, Gas, Vapor, and Liquid Service.** ASME Code stamping not * available on full port * * * design in liquid service.

15 5 4 7 6 1189

3

18

14

16

12

2

13

17

10

1

5

General Notes:

1. Part used on 3″ inlet sizes and larger. 2. Materials certifi ed in compliance with NACE hardness requirements. 3. Tefl on for seals required in main valve for temperatures below -20°F. Consult the Factory. 4. Tefl on used for O-Ring Seat Seal (Item 12) for all valves with 900#, 1500#, and 2500# inlet fl anges.

Series 3800 Main Valve Bill of Materials

Inconel is a registered trademark of Inco Alloys International, Inc.

Item No. Part Name Standard MaterialS7 NACEMR0175

S4 Complete 316 St. St.

1 Body SA-216 Gr. WCBCarbon Steel

SA-216 Gr. WCB Carbon Steel (Note 2)

SA-351 Gr. CF8MSt. St.

(316 St. St.)

2 Nozzle 316 St. St. 316 St. St. 316 St. St.

3 Piston 316 St. St. 316 St. St. 316 St. St.

4 Seat Retainer 316 St. St. 316 St. St. 316 St. St.

5 Guide / Cover 316 St. St. 316 St. St. 316 St. St.

Not Shown Guide (Note 1) 316 St. St. 316 St. St. 316 St. St.

Not Shown Cover (Note 1) SA-216 Gr. WCB Carbon Steel

SA-216 Gr. WCBCarbon Steel (Note 2)

SA-351 Gr. CF8M St. St.

Not Shown Cover Seal (Note 1) Viton Ethylene Propylene Viton (Note 3)

6 Retainer Screw 316 St. St. 316 St. St. 316 St. St.

7 Preload Spring 316 St. St. Inconel® X750 316 St. St.

8 Body Stud ASTM A193 Gr. B7Alloy Steel

ASTM A193 Gr. B7M Alloy Steel

ASTM A193 Gr. B8MSt. St.

9 Hex Nut (Body) ASTM A194 Gr. 2H Alloy Steel

ASTM A194 Gr. 2HMAlloy Steel

ASTM A194 Gr. 8MSt. St.

10 Pressure Pickup 316 St. St. 316 St. St. 316 St. St.

11 Male Elbow (2) 316 St. St. 316 St. St. 316 St. St.

12 Seat Seal Viton Ethylene Propylene Viton (Note 3)

13 Nozzle Seal Viton Ethylene Propylene Viton (Note 3)

14 Piston Seal Viton Ethylene Propylene Viton (Note 3)

15 Guide Seal Viton Ethylene Propylene Viton (Note 3)

16 Tubing 316 St. St. 316 St. St. 316 St. St.

17 Male Connector 316 St. St. 316 St. St. 316 St. St.

18 Pilot Control 316 St. St. 316 St. St.(Inconel X750 Spring) 316 St. St.

6

PCF3, HPCF3 & PCL Pilot Control Valves: Advantage Farris

Snap-Acting, Non-Flowing: the PCF3, HPCF3 and PCL pilot control valves are snap acting and non-fl owing, minimiz-ing the fl ow of line media through the pilot for reduced fugitive emissions and extended valve life.

Full 316 Stainless Steel Construction: resists corro-sion and extends the life and versatility of the PCF3, HPCF3 and PCL valves.

Adjustable Blowdown: allows setting blowdown between 3% and 7% of set pressure so that product loss is minimized and fugitive emissions reduced.

Viton Seats and Seals: these corrosion-resistant seals and seats enhance valve life. Neoprene, ethylene propylene, silicone, and Buna N soft goods are optional and extend tem-perature ranges from -65°F to 450°F. Kalrez® available when maximum resistance to chemical attack is required. Contact factory for more information.

Set Pressures and Blowdown Set at Pilot Control Valve: in line service, settings and blowdown adjustmentsare completed quickly and easily without main valve intrusion. Subsequent reduction in product loss and fugitive emissions add to system profi tability.

Field Test Capable: the use of a fi eld test connection allows cycling the pilot valve without interrupting system protection or removing the valve from the line. Field testing verifi es system integrity in accordance with the requirements of the Code.

Remote Sensing Capable: the pilot sensing line can be installed directly into the pressure vessel when the main valve is placed in the most ergonomic location. The relief valve, while remote from the vessel, operates on actual system pressure regardless of inlet piping losses.

Convertible to NACE Service: with the high quality of construction materials, conversion for NACE Service to MR0175 is simple.

Kalrez is a registered trademark of DuPont Dow Elastomers

Built in conformance to ASME Code Section VIII for Air, Gas, Vapor, and Liquid Service.** ASME Code stamping not * available on full port * * design in liquid service.

3

18

14

16

12

2

13

17

10

1

1921

26

27

25

22

23

20

15

11

8

7

6

4

9

5

24

29

28

7

Series 3800 Pilot Control Valve Bill of Materials

General Notes: 1. For NACE Service (S7 Trim), substitute ethylene propylene.

Item No. Part Name Standard Material

1 Body SA-479, 316 St. St.

2 Bonnet SA-479, 316 St. St.

3 Cap 316 St. St.

4 Spring Adjusting Screw 316 St. St.

5 Upper Spring Button 316 St. St.

6Spring - Standard 316 St. St.

Spring - NACE Inconel X750

7 Lower Spring Button 316 St. St.

8 Disc 316 St. St.

9 Jam Nut 18-8 St.

10 Guide 316 St. St.

11 Upper Seat Seal Viton (Note 1)

12 Upper Seat 316 St. St.

13 Static Seal, Body Viton (Note 1)

14 Blowdown Relay 316 St. St.

15 Lower Seat 316 St. St.

16 Retainer, Lower Seat Seal 316 St. St.

17 Lower Seat Seal Viton (Note 1)

18 Static Seal, Adjuster Viton (Note 1)

19 Blowdown Adjuster A479, 316 St. St.

20 Static Seal, Filter Viton (Note 1)

21 Filter 300 Series St. St.

22 Filter Housing 316 St. St.

23 Poppet 316 St. St.

24 Adjuster Cap Seal Viton (Note 1)

25 Blowdown Adjuster Cap 316 St. St.

26 Thread Seal Tefl on

27 Blowdown Adjuster Lock Nut 18-8 St. St.

28 Bug Vent Housing Commercial Grade

29 Wire Seal St. St. Wire/Lead Seal

30 Nameplate (Not Shown) Stainless Steel

8

Selection Table:API Nozzle Design

Orifi ceValve Size

Inlet x Outlet

ANSI Flange Class

Type Number

MaximumSet Pressure, psig Maximum

Back Pressurepsig at 100° F Letter

APIArea

Sq. In.

ActualArea

Sq. In.Inlet

RF or RJOutlet

RF-20° F100° F

500° F(Note 1)

D 0.110 0.150

1 x 2

150#300#600#

150#38DC10-12038DC12-12038DC13-120

2857401480

170 6001200

285

900#1500#2500#

300#38DC14-12038DC15-12038DC16-120

222037056170

179529954990

740

1 1/2 x 2

150#300#600#

150#38DC10X-12038DC12X-12038DC13X-120

2857401480

170 6001200

285

900#1500#2500#

300#38DC14X-12038DC15X-12038DC16X-120

222037056170

179529954990

740

E 0.196 0.225

1 x 2

150#300#600#

150#38EC10-12038EC12-12038EC13-120

2857401480

170 6001200

285

900#1500#2500#

300#38EC14-12038EC15-12038EC16-120

222037056170

179529954990

740

1 1/2 x 2

150#300#600#

150#38EC10X-12038EC12X-12038EC13X-120

2857401480

170 6001200

285

900#1500#2500#

300#38EC14X-12038EC15X-12038EC16X-120

222037056170

179529954990

740

F 0.307 0.371

1 x 2

150#300#600#

150#38FC10-12038FC12-12038FC13-120

2857401480

170 6001200

285

900#1500#2500#

300#38FC14-12038FC15-12038FC16-120

222037056170

179529954990

740

1 1/2 x 2

150#300#600#

150#38FC10X-12038FC12X-12038FC13X-120

2857401480

170 6001200

285

900#1500#2500#

300#38FC14X-12038FC15X-12038FC16X-120

222037056170

179529954990

740

G 0.503 0.559

1 1/2 x 3

150#300#600#

150#38GC10-12038GC12-12038GC13-120

2857401480

170 6001200

285

900#1500#2500#

300#38GC14-12038GC15-12038GC16-120

222037056170

179529954990

740

2 x 3

150#300#600#

150#38GC10X-12038GC12X-12038GC13X-120

2857401480

170 6001200

285

900#1500#2500#

300#/600#(Note 2)

38GC14X-12038GC15X-12038GC16X-120

222037056170

179529954990

1480

H 0.785 0.873

1 1/2 x 3

150#300#600#

150#38HC10-12038HC12-12038HC13-120

2857401480

1706001200

286

900#1500#2500#

300#38HC14-12038HC15-12038HC16-120

222037056170

179529954990

740

2 x 3

150#300#600#

150#38HC10X-12038HC12X-12038HC13X-120

2857401480

170 6001200

285

900#1500#2500#

300#/600#(Note 2)

38HC14X-12038HC15X-12038HC16X-120

222037056170

179529954990

1480

9

Selection Table: API Nozzle Design

Orifi ceValve Size

Inlet x Outlet

ANSI Flange Class

Type Number

Maximum Set Pressure, psig Maximum

Back Pressure psig at 100° FLetter

APIArea

Sq. In.

ActualArea

Sq. In.Inlet

RF or RJOutlet

RF-20° F100° F

500° F(Note 1)

J 1.287 1.430

2 x 3

150#300#600#

150#38JC10-12038JC12-12038JC13-120

2857401480

170 600 1200

285

900#1500#2500#

300#/600#(Note 2)

38JC14-12038JC15-12038JC16-120

222037056170

17952995 4990

1480

3 x 4

150#300#600#

150#38JC10X-12038JC12X-12038JC13X-120

2857401480

170 6001200

285

900#1500# 300# 38JC14X-120

38JC15X-12022203705

17952995 740

K 1.838 2.042 3 x 4

150#300#600#

150#38KC10-12038KC12-12038KC13-120

2857401480

170 600 1200

285

900#1500# 300# 38KC14-120

38KC15-12022203705

17952995 740

L 2.853 3.170

3 x 4

150#300#600#

150#38LC10-12038LC12-12038LC13-120

2857401480

170 6001200

285

900#1500# 300# 38LC14-120

38LC15-12022203705

17952995 740

4 x 6150#300#600#

150#38LC10X-12038LC12X-12038LC13X-120

2857401480

170 6001200

285

M 3.60 4.000 4 x 6150#300#600#

150#38MC10-12038MC12-12038MC13-120

2857401480

170 6001200

285

N 4.34 4.822 4 x 6150#300#600#

150#38NC10-12038NC12-12038NC13-120

2857401480

170 6001200

285

P 6.38 7.087 4 x 6150#300#600#

150#38PC10-12038PC12-12038PC13-120

2857401480

170 6001200

285

Q 11.05 12.27 6 x 8150#300#600#

150#38QC10-12038QC12-12038QC13-120

2857401480

170 6001200

285

R 16.0 17.78 6 x 8150#300#600#

150#38RC10-12038RC12-12038RC13-120

2857401480

170 6001200

285

T 26.0 28.94 8 x 10 150#300#600#

150#38TC10-12038TC12-12038TC13-120

2857401480

170 6001200

285

General Notes: 1. Standard elastomer is Viton which is suitable to a maximum temperature of 450°F. For temperatures above 450°F, the O-Ring Note1 : Seals must be specifi ed as Kalrez®. Consult the Factory. 2. The 300# and 600# fl anges have identical drilling with fl ange thickness equal to the 600# class. 3. For liquid service applications, add “L” to the type number for valves with standard size connections and “Y” for valves Notwith oversize connections. Example: 38FC10L-120 and 38FC10Y-120. 4. Valves with ring joint inlet connections available on application only. Consult the Factory.

10

Selection Table: Full Port Design

General Notes:

1. Standard elastomer is Viton which is suitable to a maximum temperature of 450°F. For temperatures above 450°F, the O-Ring Seals must be specifi ed as Kalrez. Consult the Factory. 2. The 300# and 600# fl anges have identical drilling with fl ange thickness equal to the 600# class. 3. Full port design suitable for use on air, gas, and vapor services only.

Selection Table: Dual Port Design

4. A 1″ X 2″ valve is available with an “A” orifi ce (0.719 sq. in.) provided remote sensing is specifi ed.5. Valves with ring joint inlet connections available on application only. Consult the Factory. 6. For dual outlet API Orifi ce types, liquid service valves are designated by changing the seventh digit from “D” to “E”. The full bore design is not availble for use on liquid service.

Orifi ceValve Size

Inlet x Outlet

ANSIFlange Class

Type Number


Back Pressurepsig at 100° F Letter Actual Area

Sq. In.Inlet

RF or RJ Outlet

RF-20° F100° F

500° F(Note 1)

1 1.767

1 1/2 x 2

150#300#600#

150#381C10-120381C12-120381C13-120

285 7401480

170 6001200

285

900#1500#2500#

300#381C14-120381C15-120381C16-120

222037056170

179529954990

740

1 1/2 x 3

150#300#600#

150#381C10X-120381C12X-120381C13X-120

2857401480

170 6001200

285

900#1500#2500#

300#381C14X-120381C15X-120381C16X-120

222037056170

17952995 4990

740

2 2.953 2 x 3

150#300#600#

150#382C10-120382C12-120382C13-120

2857401480

170 6001200

285

900#1500#2500#

300#/600#(Note 2)

382C14-120382C15-120382C16-120

222037056170

1795 29954990

1480

3 6.605 3 x 4

150#300#600#

150#383C10-120383C12-120383C13-120

2857401480

170 6001200

285

900#1500# 300# 383C14-120

383C15-12022203705

17952995 740

4 11.50 4 x 6150#300#600#

150#384C10-120384C12-120384C13-120

2857401480

170 6001200

285

6 26.07 6 x 8150#300#600#

150#386C10-120386C12-120386C13-120

2857401480

170 6001200

285

8 45.66 8 x 10 150#300#600#

150#388C10-120388C12-120388C13-120

2857401480

170 6001200

285

Orifi ceValve Size

Inlet x Outlet

ANSIFlange Class

Type Number


Back Pressurepsig at 100° F Letter API Area

Sq. In.Actual Area

Sq. In.Inlet

RF or RJ Outlet

RF-20° F100° F

500° F(Note 1)

Q 11.05 12.27 6 x 8 x 8150#300#600#

150# 38QC10D-12038QC12D-12038QC13D-120

285 7401480

170 6001200

285

R 16.0 17.78 6 x 8 x 8150#300#600#

300#38RC10D-12038RC12D-12038RC13D-120

285 7401480

170 6001200

285

T 26.0 28.94 8 x 10 x 10150#300#600#

150#38TC10D-12038TC12D-12038TC13D-120

2857401480

170 6001200

285

#6 – 26.07 6 x 8 x 8150#300#600#

300#386C10D-120386C12D-120386C13D-120

285 7401480

170 6001200

285

#8 – 45.66 8 x 10 x 10150#300#600#

150#388C10D-120388C12D-120388C13D-120

2857401480

170 6001200

285

11

Air Capacities: API Nozzle, 10% Overpressure

General Notes: 1. Capacities at 30 psig and below are based on 3 psi overpressure.

ASME PRESSURE VESSEL CODE (UV) CAPACITIES IN STANDARD CUBIC FEET PER MINUTE AT 60°F

SetPressure

(psig)

Orifi ce Area, Sq. InchesD E F G H J K L M N P Q R T

0.110 0.196 0.307 0.503 0.785 1.287 1.838 2.853 3.60 4.34 6.38 11.05 16.0 26.0 1520304050

7789112138164

115133168207246

191220278342407

287331419516613

449518655806958

736848107413211569

10511212153318872241

16321881238029303479

20592374300436974390

2482 2862 3621 4457 5292

36494207 5323 6550 7778

63177283 9215 1134113466

9155 10554 13354 16434 19513

14901 17179 21736 26749 31762

60708090100

190216242268294

285324363402441

471535599664728

71080790310001097

11091260141115621714

18172064231225602807

25942948330236554009

40284577512656756224

50825775646871617854

6127 69627797 8633 9468

9005 10233 11460 12688 13915

15591 17717 19842 2196724092

22593 25673 28752 3183234912

36774 41787 46800 51812 56825

150200250300350

424554684814944

636831102612211416

10491371169220132335

15812065254930343518

24703226398247385494

40465284652377619000

5778754693151108312851

896911715144601720519951

1131814782182462171125175

13644 17820 21996 26172 30348

20053 26191 32328 38466 44604

34719 4534555972 66598 77225

50310 65708 81107 96505 111903

81889 106952 132015 157079 182142

400450500550600

10731203133314631593

16101805200021952390

26562977329836203941

40024486497054545938

62507006776285189274

1023811477127151395315192

1462016388181571992521694

2269625442281873093233678

2863932103355673903242496

34524 38700 42876 47053 51229

50741 56879 63017 69154 75292

87851 98477 109104 119730 130357

127302 142700 158098 173497 188895

207206 232269 257333 282396 307459

650700750800850

17231853198321132243

25852780297431693364

42624584490552265548

64226907739178758359

1003010786115421229913055

1643017669189072014621384

2346225231269992876830536

3642339168419144465947405

4596049424528885635259817

5540559581 63757 6793372109

81430 87567 93705 99843 105981

140983 151609 162236 172862 183489

204293 219692 235090 250488 265887

332523 357586 382650 407713 432777

900950100010501100

23732502263227622892

35593754394941444339

58696190651168337154

8843932798111029510780

1381114567153231607916835

2262323861250992633827576

3230534073358423761039379

5015052895556415838661131

6328166745702097367377138

7628580461 84637 88813 92989

112118 118256124394 130531 136669

194115204741 215368 225994 236621

281285 296683 312082 327480 342878

457840 482903 507967 533030 558094

11501200125013001350

30223152328234123542

45334728492351185313

74757797811884398761

1126411748122321271613200

1759118347191031985920615

2881530053312923253033769

4114742915446844645248221

6387766622693687211374858

8060284066875309099494459

97166 101342 105518 109694113870

142807 148944 155082 161220 167357

247247 257873 268500 279126 289753

358277 373675 389073 404472 419870

583157 608221 633284 658348 683411

14001450150015501600

36723802393140614191

55085703589760926287

9082940397241004610367

1368414168146531513715621

2137122127228832363924395

3500736246374843872239961

4998951758535265529557063

7760480349830948584088585

97923101387 ——————

118046 122222 —— —— ——

173495 179633 —— —— ——

300379 311006 —— —— ——

435268 450667 —— —— ——

708474 733538 —— —— ——

16501700175018001850

43214451458147114841

64826677687270677261

1068811010113311165211974

1610516589170731755718041

2515225908266642742028176

4119942438436764491546153

5883260600623696413765906

91331940769682199567102312

——————————

—— —— —— —— ——

—— —— —— —— ——

—— —— —— —— ——

—— —— —— —— ——

—— —— —— —— ——

19002000210022002300

49715231549057506010

74567846823686259015

1229512938135801422314865

1852519494204622143022398

2893230444319563346834980

4739249868523455482257299

6767471211747487828581822

105057110548116039121530127020

——————————

—— —— —— —— ——

—— —— —— —— ——

—— —— —— —— ——

—— —— —— —— ——

—— —— —— —— ——

24002500260027002800

62706530678970497309

94059795101841057410964

1550816151167931743618078

2336724335253032627127240

3649238005395174102942541

5977662253647306720769684

8535988896924339597099506

132511138002143493148983154474

——————————

—— —— —— —— ——

—— —— —— —— ——

—— —— —— —— ——

—— —— —— —— ——

—— —— —— —— ——

29003000350040004500

7569782991281042711726

1135411743136921564017589

1872119364225772579029003

2820829176340173885943700

4405345565531266068668247

72161746378702299406111791

103043 106580 124265 141950 ——

159965165456192909220363 ——

——————————

—— —— —— —— ——

—— —— —— —— ——

—— —— —— —— ——

—— —— —— —— ——

—— —— —— —— ——

5000550060006170

13025143241562316065

19538214862343524097

32216354293864239734

48541533825822359869

75808833689092993499

124175 136560 148944 153155

————————

—— —— —— ——

————————

—— —— —— ——

—— —— —— ——

—— —— —— ——

—— —— —— ——

—— —— —— ——

12

Air Capacities: Full Port, 10% Overpressure



SetPressure

(psig)

Orifi ce Area, Sq. InchesA #1 #2 #3 #4 #6 #8

0.719 1.767 2.953 6.605 11.50 26.07 45.66 1520304050

345398503619735

848978123715221808

14171634206825453022

31713656462656926759

552163658054991111769

1251714431182592246926680

21923 25275 31979 39354 46729

60708090100

851968108412001316

20932379266429493235

34993976445249295406

7826889399601102612093

1362615484173411919821056

3089135101393124352347733

54103 61478 68853 76228 83602

150200250300350

18972477305836394219

466260897516894310370

779110176125611494517330

1742722761280953342938763

3034339630489175820467491

6878789840110894 131947 153000

120476 157350 194224 231097 267971

400450500550600

48005380596165427122

1179713224146511607817505

1971522100244842686929254

4409749431547656009965433

767788606595352104640 113927

174054 195107 216161 237214 258267

304845 341719 378592 415466 452340

650700750800850

770382848864944510026

1893220359217862321324640

3163934024364083879341178

7076776101814358676992103

123214 132501 141788 151075 160362

279321 300374 321428 342481 363534

489214 526087 562961 599835 636709

900950100010501100

1060611187117681234812929

2606727494289203034731774

4356345947483325071753102

97437102771 108105 113439 118773

169649 178936 188223 197510 206797

384588 405641 426695 447748 468801

673582 710456 747330 784204 821077

11501200125013001350

1351014090146711525115832

3320134628360553748238909

5548657871602566264165025

124107 129441 134775 140110 145444

216085 225372 234659 243946 253233

489855 510908 531962 553015 574069

857951 894825 931699 968572 1005446

14001450150015501600

1641316993175741815518735

4033641763431904461746044

6741069795721807456476949

150778 156112 161446166780172114

262520 271807 ——————

595122 616175 ——————

1042320 1079194

—— —— ——

16501700175018001850

1931619897204772105821639

4747148898503255175253179

7933481719841048648888873

177448182782188116193450198784

——————————

——————————

—— —— —— —— ——

19002000210022002300

2221923380245422570326864

5460657460603146316866022

9125896027100797 105566 110336

204118214786225454236122246790

——————————

——————————

—— —— —— —— ——

24002500260027002800

2802629187303483150932671

6887671730745847743880292

115105 119875 124644 129414 134183

257458268126278794289462300130

——————————

——————————

—— —— —— —— ——

29003000350040004500

3383234993408004660652413

8314686000100269 114539 128809

138953 143723 167570 191418215265

310798321466374806————

——————————

——————————

—— —— —— —— ——

5000550060006170

58219640266983271806

143079 157349 171619 176470

239113262961286808294916

————————

————————

————————

—— —— —— ——

13

Natural Gas Capacities: API Nozzle

General Notes: 1. Minimum set pressure for 1″ x 2″ size valves in any orifi ce is 20 psig. 2. Capacities based on a specifi c gravity of 0.65 at a temperature of 60°F. 3. Capacities at 30 psig and below are based on 3 psi overpressure.


SetPressure

(psig)


0.110 0.196 0.307 0.503 0.785 1.287 1.838 2.853 3.60 4.34 6.38 11.05 16.0 26.0 1520304050

93107135167198

139161203250297

230265336413491

347400506623740

5426257919731155

8881024129515941893

12681462185022772703

19692270287235354197

24842864362444605296

2995345343695377 6385

4402 5075 6422 7903 9384

7622 8788 11119 13683 16247

11045 12734 16112 19827 23543

17978 20727 26225 32273 38320

60708090100

229261292324355

344391438486533

568646723801878

857973109012071324

13381520170318852068

21922491279030883387

31303557398444104837

48605522618468477509

61326968780486409476

7392 8400 9408 10415 11423

10865 12346 13827 15308 16789

18811 21375 23939 26503 29068

27259 30974 34690 38405 42121

44368 50416 56464 62512 68559

150200250300350

5126688259821139

7681003123814731708

12661654204124292817

19082492307636604244

29803892480457166629

488163767870936410858

69719104112381337215505

1082214134174462075824071

1365517835220142619430373

1646121500 26538 31577 36615

24194 31599 39004 46409 53814

41888 54709 67530 80350 93171

60699 79277 97855 116433 135011

98798 129037 159276 189515 219754

400450500550600

12951452160917651922

19432178241326482884

32043592398043674755

48285412599765817165

7541845393651027711190

1235213847153411683518329

1763919773219062404026174

2738330695340083732040632

3455338732429124709151271

41654 46692 5173056769 61807

61219 68625 76030 83435 90840

105992 118813 131633 144454 157275

153589 172167 190745 209323 227901

249993 280232 310471 340710 370949

650700750800850

20792236239225492706

31193354358938244059

51435530591863066693

774983338917950110085

1210213014139261483815750

1982321317228122430625800

2830730441325753470836842

4394447257505695388157194

5545159630638106798972169

66846 71884 76923 81961 86999

98245 105650 113055 120460 127865

170096 182916 195737 208558 221378

246479 265057 283635 302213 320791

401188 431427 461666 491905 522143

900950100010501100

28633019317633333490

42944529476449995235

70817468785682448631

1066911253118371242213006

1666317575184871939920311

2729428788302833177733271

3897641109432434537647510

6050663818671307044373755

7634880528847078888793066

92038 97076 102115 107153 112192

135270 142675 150081 157486 164891

234199 247020 259841 272661 285482

339370 357948 376526 395104 413682

552382 582621 612860 643099 673338

11501200125013001350

36463803396041164273

54705705594061756410

9019940797941018210570

1359014174147581534215926

2122422136230482396024872

3476536259377533924840742

4964451777539115604558178

7706780380836928700490316

97246101425 105605 109784 113964

117230 122268 127307 132345 137384

172296 179701 187106 194511 201916

298303 311124 323944 336765 349586

432260 450838 469416 487994 506572

703577 733816 764055 794294 824533

14001450150015501600

44304587474349005057

66456880711573507585

1095711345117331212012508

1651017094176781826218846

2578426697276092852129433

4223643730452244671948213

6031262446645796671368847

9362996941100253103566106878

118144 122323 ——————

142422 147461 —— —— ——

209321 216726 —— —— ——

362406 375227 —— —— ——

525150 543728 —— —— ——

854772 885011 —— —— ——

16501700175018001850

52145370552756845840

78218056829185268761

1289613283136711405914446

1943120015205992118321767

3034531258321703308233994

4970751201526955418955684

7098073114752487738179515

110190113502116815120127123439

——————————

—— —— —— —— ——

—— —— —— —— ——

—— —— —— —— ——

—— —— —— —— ——

—— —— —— —— ——

19002000210022002300

59976311662469387251

8996946699361040710877

1483415609163841716017935

2235123519246872585627024

3490636731385554037942204

5717860166631556614369131

8164985916901839445098718

126751133376140001146625153250

——————————

—— —— —— —— ——

—— —— —— —— ——

—— —— —— —— ——

—— —— —— —— ——

—— —— —— —— ——

24002500260027002800

75657878819185058818

1134711817122871275813228

1871019486202612103621812

2819229360305283169632865

4402845852476774950151326

7212075108780968108584073

102985 107252 111520 115787 120054

159874166499173123179748186373

——————————

—— —— —— —— ——

—— —— —— —— ——

———— —— —— ——

—— —— —— —— ——

—— —— —— —— ——

29003000350040004500

91329445110131258014147

1369814168165191887021221

2258723362272393111534992

3403335201410424688352724

5315054974640967321882340

8706290050104992 119934 134875

124322 128589 149925 171262 ——

192997199622232745265867 ——

——————————

—— —— —— —— ——

—— —— —— —— ——

—— —— —— —— ——

—— —— —— —— ——

—— —— —— —— ——

5000550060006170

15715172821884919382

23572259232827429074

38868427454662147939

58565644067024672232

91462100583 109705 112807

149817 164759 179701 184781

————————

—— —— —— ——

————————

—— —— —— ——

—— —— —— ——

—— —— —— ——

—— —— —— ——

—— —— —— ——

14

General Notes: 1. Minimum set pressure for 1″ x 2″ size valves in any orifi ce is 20 psig. 2. Capacities based on a specifi c gravity of 0.65 at a temperature of 60°F. 3. Capacities at 30 psig and below are based on 3 psi overpressure.

Natural Gas Capacities: Full Port ASME PRESSURE VESSEL CODE (UV) CAPACITIES IN STANDARD CUBIC FEET PER MINUTE AT 60°F

SetPressure

(psig)

Orifi ce Area, Sq. Inches A #1 #2 #3 #4 #6 #8

0.719 1.767 2.953 6.605 11.50 26.07 45.66 1520304050

416480607747887

10231180149318372181

17101972249530703646

38264411558168688155

6661768097171195814199

1510117411220292710932189

26450 30494 38583 47480 56378

60708090100

10271168130814481588

25262870321435593903

42214797537259476523

944210729120161330314590

1644018681209222316325404

3726942350474305251057590

65276 74173 83071 91968 100866

150200250300350

22882989368943905091

5625734690681079012511

940012277151551803220909

2102627461338974033246768

3660947814590187022381428

82991108392 133793 159194 184594

145354 189842 234330 278818 323306

400450500550600

57916492719278938593

1423315954176761939821119

2378626663295413241835295

5320359639660747251078945

92633103838 115043 126247 137452

209995 235396 260797 286198 311599

367794 412282 456770 501258 545746

650700750800850

92949994106951139512096

2284124563262842800629728

3817241049439274680449681

853819181698252104687 111122

148657 159862 171067 182271 193476

337000 362400 387801 413202 438603

590234 634723 679211 723699 768187

900950100010501100

1279713497141981489815599

3144933171348933661438336

5255855435583136119064067

117558 123993 130429 136864 143300

204681 215886 227091 238296 249500

464004 489405 514806 540206 565607

812675 857163 901651 946139 990627

11501200125013001350

1629917000177001840119101

4005841779435014522246944

6694469821726997557678453

149735 156171 162606 169042 175477

260705 271910 283115 294320 305525

591008 616409 641810 667211 692612

1035115 1079603 1124091 1168579 1213067

14001450150015501600

1980220503212032190422604

4866650387521095383155552

8133084207870858996292839

181913 188348 194784201219207655

316729 327934 ——————

718012 743413 ——————

1257555 1302043

—— —— ——

16501700175018001850

2330524005247062540626107

5727458996607176243964161

9571698593101471 104348 107225

214090220525 226961233396239832

——————————

——————————

—— —— —— —— ——

19002000210022002300

2680728209296103101132412

6588269325727697621279655

110102 115857 121611 127366 133120

246267 259138 272009284880297751

——————————

——————————

—— —— —— —— ——

24002500260027002800

3381335214366153801639417

8309986542899859342996872

138874 144629 150383 156138 161892

310622323493 336364349235362106

——————————

——————————

—— —— —— —— ——

29003000350040004500

4081842219492255623063236

100315 103758 120975 138191 155408

167646 173401 202173 230945 259717

374977387848452202516557——

——————————

——————————

—— —— —— —— ——

5000550060006170

70241772478425286634

172624 189841 207057 212911

288489 317261 346033 355816

————————

————————

————————

—— —— —— ——

15


Water Capacities: API Nozzle, 10% Overpressure

ASME PRESSURE VESSEL CODE (UV) CAPACITIES IN US GALLONS PER MINUTE AT 70°F

SetPressure

(psig)


0.110 0.196 0.307 0.503 0.785 1.287 1.838 2.853 3.60 4.34 6.38 11.05 16.0 26.0 1520304050

18.921.325.629.533.0

28.332.038.444.349.5

46.752.863.373.181.7

70.479.695.4110123

110124149172192

180203244281315

257291348402450

399451541624698

504 570 682 788 881

607 687 823 950 1062

893 1009 1209 1396 1561

1546 1748 2094 2418 2703

2241 2533 3035 3504 3918

3648 4124 4940 5704 6377

60708090100

36.239.141.844.346.7

54.358.662.766.570.1

89.596.7103109115

134145155165174

210227243258272

345372398422445

492532569603636

765826883937987

965 1042 1115 1182 1246

1164 1257 1344 1425 1502

1710 1847 1975 2095 2208

2962 3199 3420 3627 3824

4292 4636 4956 5256 5541

6986 7546 8067 8556 9019

150200250300350

57.266.173.980.987.4

85.899.1110121131

141163182200216

213246275301325

333384430471509

545630704771833

779900100611021190

12091397156217111848

1526 1762 1971 2159 2332

1840 2125 2376 2602 2811

2705 3123 3492 3825 4132

4683 5407 6046 6623 7154

6786 7836 8761 9597 10366

11046 12755 14260 15621 16873

400450500550600

93.499.1104109114

140148156164171

231245258271283

348369389408426

544577608638666

89194599610451091

12721350142314921558

19752095220923162419

2493 2644 2787 2923 3053

3005 3187 3360 3524 3681

4417 4685 4938 5179 5410

7648 8111 8550 8968 9366

1108211754 12390 12995 13573

18038 19132 20167 21152 22092

650700750800850

119123128132136

178185192198204

294305316327337

444460477492507

693719745769793

11361179122012601299

16221683174218001855

25182613270527942880

3178 3298 3414 3525 3634

3831 3976 4115 4250 4381

5631 5843 6048 6247 6439

9749 10117 10472 10815 11148

14127 14660 15175 15672 16155

22994 23862 24700 25510 26295

900950100010501100

140144147151155

210216221227232

346356365374383

522536550564577

816838860881902

13361373140914441478

19091961201220622110

29633045312432013276

3739 3842 3942 4039 4134

4508 4631 4752 4869 4984

6626 6807 6984 7156 7325

11472 11786 12092 12391 12682

16623 17079 17522 17955 18378

27057 27799 28521 29225 29913

11501200125013001350

158161165168171

237242247252257

392400408416424

590603615628640

922942961980999

15111543157516061637

21582204225022942338

33503422349235623629

4227 4318 4407 4494 4580

5096 5205 5313 5418 5521

7490 7651 7808 7963 8115

12967 13246 13519 13787 14050

18791 19195 19591 19979 20359

30585 31243 31887 32519 33138

14001450150015501600

174178181184186

262267271276280

432440447455462

651663674685696

10181036105310711088

16671697172617541782

23812423246425052545

36963761382638893951

4664 4746 —— —— ——

5622 5722 —— —— ——

8264 8410 —— —— ——

14308 14561 —— —— ——

20733 21100 —— —— ——

33747 34344 —— —— ——

16501700175018001850

189192195198201

284289293297301

469476483490497

707718728739749

11051121113811541170

18101837186418901916

25852623266227002737

40134073413241914249

—— —— —— —— ——

—— —— —— —— ——

—— —— —— —— ——

—— —— —— —— ——

—— —— —— —— ——

—— —— —— —— ——

19002000210022002300

203209214219224

305313321328336

503517529542554

759779798817835

11851216124612761304

19421993204220902137

27732846291629843052

43064418452746334738

—— —— —— —— ——

—— —— —— —— ——

—— —— —— —— ——

—— —— —— —— ——

—— —— —— —— ——

—— —— —— —— ——

24002500260027002800

229233238242247

343350357364371

566578589600611

853871888905921

13321360138714131439

21832228227223152358

31173181324533063367

48394939503751335227

—— —— —— —— ——

—— —— —— —— ——

—— —— —— —— ——

—— —— —— —— ——

—— ———— —— ——

—— —— —— —— ——

29003000350040004500

251256276295313

377384414443470

622633684731775

938954103011011168

14651490160917201825

23992441263628182989

3427348537644024 ——

5320541158446248 ——

—— —— —— —— ——

—— —— —— —— ——

—— —— —— —— ——

—— —— —— —— ——

—— —— —— —— ——

—— —— —— —— ——

5000550060006170

330346362367

495520543550

817857895908

1231129213491368

1923201721072137

3151330534523500

—— —— —— ——

—— —— —— ——

—— —— —— ——

—— —— —— ——

—— —— —— ——

—— —— —— ——

—— —— —— ——

—— —— —— ——

16

1Temperatures & Materials

Des

igna

tion

Numbering System

CConstruction

C Elastomer O-Ring Seat Seal

T Tefl on O-Ring* Seat & Seals(Main Valve Only)*For cryogenic *applications to *-450° F, add S4 to *the type number. *Consult the Factory.

DOrifi ce Area

Designation API Actual & Orifi ce Orifi ce Area Orifi ce Area Letter Sq. In. Sq. In.

D 0.110 0.150 E 0.196 0.225 F 0.307 0.371 G 0.503 0.559 H 0.785 0.873 J 1.287 1.430 K 1.838 2.042 L 2.853 3.170 M 3.60 4.000 N 4.34 4.822 P 6.38 7.087 Q 11.05 12.27 R 16.00 17.78 T 26.00 28.94 A – 0.719 1 – 1.767 2 – 2.953 3 – 6.605 4 – 11.50 6 – 26.07 8 – 45.66

38Series Number

38

To simplify the selection and specifying of Farris pressure relief valves, use the following type numbering system. The type number-ing system is ideal as the digits which comprise a specifi c type number have a distinct signifi cance. The digits describe the basic valve series, orifi ce, seat and internal construction, inlet temperature range, body, and spring material, inlet fl ange class as well as Code liquid design.

Ordering InformationTo properly process your order and avoid delay please specify the following:

11. Backpressure, Superimposed Constant and/or Variable and Built-up*.

12. Required Capacity*.13. Physical Properties of Fluid (Molecular Wt., Specifi c Gravity,

etc.).14. Accessories

a) Manual or Remote Blowdownb) Field Test Connectionc) Reverse Flow Preventerd) Auxiliary Filters

15. Code Requirements, if any.

1. Quantity2. Inlet and Outlet Size.3. Farris Type Number*.4. Inlet and Outlet Flange Class and Facing.5. Materials of Construction, if other than Standard.6. O-Ring Seal Material (Viton is Standard).7. Set Pressure*.8. Maximum Inlet Temperature*.9. Allowable Overpressure*.10. Fluid and Fluid State*.

* As a customer service we verify your selection and sizing. If this service is desired, you must include this information.Note: If valve modifi cation or set pressure changes are required, consideration must be given to correct the nameplate and other data.

Inlet Material

Temperature Body Range °F & Cover Spring

1 -20 to 450 Carbon Stainless Steel Steel

1 -20 to -450 Consult Consult Factory Factory

17

0Options

No Options ...........0Dual PilotControls ...............2Auxiliary Filter ......3Manual Depressurizing .....4Field Test Connections .........5Automatic Reverse Flow Preventer .............6Pressure Spike Snubbers .............7RemoteDepressurizing .....8Four Auxiliary Functions* ...........9Specify Combination of Options Following Complete Type Number ................CRemote Sensing ............... R

2PilotControl

Snap Acting Pilot Control ........2Modulating Pilot Control ...... M

2Inlet Class

ANSI

Nominal Inlet Flange Class

0 150 2 300 3 600 4 900 5 1500 6 2500

Des

igna

tion

XSpecialConstruction

(If applicable)L-Liquid Service

(Standard Connections)

X-Air & Vapor Service (Oversize Connections)

Y-Liquid Service (Oversize Con-nections)

D-Air & VaporService(Dual Outlet)1

E-Liquid Service (Dual Outlet)1

1. Available on 6 ″ and 8″ inlet size valves only.

1Inlet Facing

Special ................0Raised Face, ANSI Std. (125 to 160 AARH) .........1Ring Joint ANSI Std. (Octagonal) .........963 AARH Smooth Finish RF ............ HAlthough not applicable to the inlet facing only, the following fi rst digit letters are also used:63 to 83 AARH (Outlet only) ........J63 to 83 AARH (Inlet and outlet) ................ K

-

Parts ReplacementValves: If an exact replacement valve is required, the valve type, size and serial number must be specifi ed to assure proper dimensions and material being supplied. If a specifi c valve has become obsolete, a recommendation for the current equivalent, if any, will be made.

Spare Parts: When ordering parts, use part names as listed in the bills of material in this catalog. Specify valve type, size and serial number. If serial number is not available, the original Far-ris factory order number will assist in our supplying the proper part and material.

Springs: Order as an assembly to include spring with upper and lower spring buttons. Specify valve type, size, serial num-ber, set pressure and back pressure, if any.

* Includes a combination * of 4, 5, 6 & 8.

Guarantee All products manufactured by Farris Engineering are warranted free of defects in material and workmanship when used within the range recommended for a period of one year after installa-tion or eighteen months from delivery. When authorized, any defective product may be returned to the factory and if found defective will be repaired or replaced free of charge, solely at the discretion of Farris Engineering, ex-works our factory. No charge for labor or other expense incurred will be allowed, as the liability of Farris Engineering is measured by the refund price of the defective product only. All warranties are based on the product being used within the range recommended.

This warranty does not cover the performance of valves tested at site on test equipment that is not to the same technical stan-dard as that used by the manufacturer.

/S4SpecialMaterial

S4 Complete 316 St. St.

S7 NACE Construction

0 10 20 30 40 50 60 70 80 90 1000

.10

.20

.30

.40

.50

.60

.70

.80

.90

1.0

1.1

K b=

CAP

ACIT

Y W

ITH

BAC

K PR

ESSU

RE

RAT

ED C

APAC

ITY

WIT

HO

UT

BACK

PR

ESSU

RE

% ABSOLUTE BACK PRESSURE = TOTAL BACK PRESSURE, PSIA

SET PRESSURE + OVERPRESSURE, PSIA X 100

Example: Set Pressure = 100 PSIGTotal Back Pressure = 80 PSIG (k = 1.30)

%Absolute B.P. = 80 + 14.7 x 100 =76% 100 + 10 + 14.7Follow Dotted Line Kb = 0.89 (From Curve)Capacity with B.P. = 0.89 x Rated Capacity without B.P.

Back Pressure Sizing Factor Kb

18

The 3800 Series pilot operated valves are built in conformance to Section VIII of the ASME Boiler and Pressure Vessel Code for air, gas, vapor and liquid services. Sizing is per the equations listed below.

For Air, Gas & Vapor Service: (SCFM) For Vapor or Gas Service: (Lbs./hr.) For Liquid Service: (G.P.M.)

Where: A = Required orifi ce area in square inches V = Required gas capacity in SCFM W = Required vapor capacity in pounds per hour

VL = Required liquid capacity in U.S. gallons per minute P = Relieving pressure in pounds per square inch absolute = set pressure + overpressure + 14.7 psig where the overpressure is 10% or 3 psig, whichever is greater. P = 1.10 x set pressure + 14.7 psig or P = set pressure + 3 psig + 14.7 psig ΔP = Set pressure + overpressure – back pressure in psig T = Inlet temperature, absolute (°F plus 460) C = Gas or vapor fl ow constant M = Average molecular weight of vapor

G = Specifi c gravity of gas or liquid at actual discharge temperature Z = Compressibility factor corresponding to T and P. If this factor is not available, compressibility correction can be safely ignored using a value of Z = 1.0 Kb = Back pressure correction factor (air, gas & vapor only)

Kd = Coeffi cient of discharge (Note 1) ASME (actual) API (effective) Air, gas & vapor service, API Full Nozzle Design ............ 0.859 ................. 0.954 Air, gas & vapor service, Full Port Design ...................... 0.801 ................. n/a Liquid service, API Full Nozzle Design Only ................... 0.782 ................. 0.869

A = V√G√T√Z

1.175CKdPKbA = W√T√Z

CKdP√MKb

Sizing Information

A = VL√G

38.0Kd√ΔPKu

General Notes: 1. When sizing and selecting valves by the API orifi ce areas, use the API coeffi cient of discharge in the equation.

19

A full line of accessories is available to meet your service requirements.

Manual or Remote Blowdown: the main valve can be cycled to the open position by venting the pressure in the dome above the piston. The optional manual valve for this purpose mounts directly on the main valve. By installing a solenoid valve, the main valve can be cycled remotely. Neither the manual or remote blowdown system will interfere with the normal overpressure protection provided by the main valve and pilot.

Reverse Flow Preventer: in a system where back pressure exceeds system pressure, it is possible for the main valve to open and allow fl ow from the discharge system to enter the inlet side. A reverse fl ow preventer assures that the back pressure, as a minimum, is maintained in the dome area so that the main valve remains closed.

Field Test Connection: the set pressure of Farris pilot operated relief valves can be verifi ed without interrupting system protection and does not require overpressure of the system. An auxiliary source of pressure, such as a nitrogen bottle, is connected to the pilot sensing line through a stop valve. Pressure applied to the pilot valve reacts the way it would if the pilot were sensing overpressure in the main valve sensing line. A check valve restricts the source pressure from back-fl owing into the main inlet. Both pilot and main valves will cycle at set pressure, verifying the set pressure and validating that the system is in compliance with ASME Section VIII, UG-136(a)(3).

Spike Snubbers: a spike snubber installed in the pilot valve sensing line will eliminate the negative effects of pressure pulsation caused by a positive displacement compressor. It assures that the pilot valve is sensing and reacting to mean pressure to protect the system and not to cyclic pressure that can be caused by a com-pressor.

Auxiliary Filters: every PCF3 pilot valve is manufactured with an internal fi lter to reduce the fl ow of erosive particlesthrough the pilot control. Auxiliary fi lters for the pilot valve sensing line are available to complement the internal fi lter for special services.

PILOTCONTROL

EXHAUST

EXHAUST

MANUAL BLOWDOWN VALVE(OPEN TO DEPRESSURE)

CHECK VALVE FORREMOTE CONTROL ONLY

INLET PRESSURECONNECTION


DOUBLE ACTINGCHECK VALVE

PILOTCONTROL

EXHAUST

PILOTCONTROL

EXHAUST


CHECK VALVEBLEED VALVECHECK VALVE

AUXILIARYPRESSURE

SOURCE

AUXILIARYINPUT LINE

PRESSURE REGULATOR AND/ORMANUAL METERING VALVE FOR TESTING

MANUAL STOP VALVE(OPEN FULLY BEFORE

TESTING SAFETY VALVE)

Accessories

Manual or Remote Blowdown

Reverse Flow Preventer

Field Test Connection

Dimensions and Weights: API Nozzle

20

Valve SizeInlet x Outlet Type Number

ANSIFlange Class

Dimension(Inches) Approx.

WeightLbs. Inlet

RFOulet

RF A B C E F

1 x 2

38DC10-12038DC12-12038DC13-120

150#300#600#

150# 12 1/812 3/812 3/8

4 1/24 1/24 1/2

4 1/84 3/84 3/8

1/161/161/4

11/1615/1615/16

30 30 30

38DC14-12038DC15-12038DC16-120

900#1500#2500#

300# 12 7/812 7/8

13

4 3/44 3/44 3/4

4 15/16 4 15/164 15/16

1/41/41/4

1 7/161 7/161 11/16

49 49 55

1 x 2

38EC10-120 38EC12-120 38EC13-120

150#300#600#

150# 12 1/812 3/812 3/8

4 1/24 1/24 1/2

4 1/84 3/84 3/8

1/161/161/4

11/1615/1615/16

30 30 30

38EC14-120 38EC15-120 38EC16-120

900#1500#2500#

300# 12 7/812 7/8

13

4 3/44 3/44 3/4

4 15/16 4 15/16 4 15/16

1/41/41/4

1 7/161 7/161 11/16

49 49 55

1 x 2

38FC10-120 38FC12-120 38FC13-120

150#300#600#

150# 12 1/812 3/812 3/8

4 1/24 1/24 1/2

4 1/84 3/84 3/8

1/161/161/4

11/1615/1615/16

30 30 30

38FC14-120 38FC15-120 38FC16-120

900#1500#2500#

300# 12 7/812 7/8

13

4 3/44 3/44 3/4

4 15/16 4 15/16 4 15/16

1/41/41/4

1 7/161 7/161 11/16

49 49 55

1 1/2 x 2

38DC10X-12038DC12X-12038DC13X-120

150#300#600#

150# 13 1/213 1/213 1/2

4 3/44 3/44 3/4

4 7/84 7/84 7/8

1/161/161/4

1 1/81 1/81 1/8

32 32 32

38DC14X-12038DC15X-12038DC16X-120

900#1500#2500#

300# 14 1/214 1/214 5/8

5 1/25 1/25 1/2

5 7/85 7/85 7/8

1/41/41/4

1 9/161 9/162 1/8

71 71 85

1 1/2 x 2

38EC10X-12038EC12X-12038EC12X-120

150#300#600#

150# 13 1/213 1/213 1/2

4 3/44 3/44 3/4

4 7/84 7/84 7/8

1/161/161/4

1 1/81 1/81 1/8

32 3232

38EC14X-12038EC15X-12038EC16X-120

900#1500#2500#

300# 14 1/214 1/214 5/8

5 1/25 1/25 1/2

5 7/85 7/85 7/8

1/41/41/4

1 9/16 1 9/162 1/8

7171 85

1 1/2 x 2

38FC10X-12038FC12X-12038FC13X-120

150#300#600#

150# 13 1/213 1/213 1/2

4 3/44 3/44 3/4

4 7/84 7/84 7/8

1/161/161/4

1 1/81 1/81 1/8

32 32 32

38FC14X-12038FC15X-12038FC16X-120

900#1500#2500#

300# 14 1/214 1/214 5/8

5 1/25 1/25 1/2

5 7/85 7/85 7/8

1/41/41/4

1 9/161 9/162 1/8

71 71 85

1 1/2 x 3

38GC10-12038GC12-12038GC13-120

150#300#600#

150# 13 1/213 1/213 1/2

4 7/84 7/84 7/8

5 1/85 1/85 1/8

1/161/161/4

1 3/161 3/161 3/16

40 40 42

38GC14-12038GC15-12038GC16-120

900#1500#2500#

300# 14 3/414 3/414 7/8

6 3/46 3/46 3/4

6 3/86 3/86 3/8

1/41/41/4

1 9/161 9/162 1/8

81 81 96

1 1/2 x 3

38HC10-12038HC12-12038HC13-120

150#300#600#

150# 13 1/213 1/213 1/2

4 7/84 7/84 7/8

5 1/85 1/85 1/8

1/161/161/4

1 3/161 3/161 3/16

40 40 42

38HC14-12038HC15-12038HC16-120

900#1500#2500#

300# 14 3/414 3/414 7/8

6 3/46 3/46 3/4

6 3/86 3/86 3/8

1/41/41/4

1 9/161 9/162 1/8

81 81 96

2 x 3

38GC10X-12038GC12X-12038GC13X-120

150#300#600#

150# 14 1/214 1/214 1/2

4 7/84 7/84 7/8

5 3/85 3/85 3/8

1/161/161/4

1 1/41 1/41 1/4

45 55 75

38GC14X-12038GC15X-12038GC16X-120

900#1500#2500#

300#/600# 15 5/815 5/816 1/4

6 3/46 3/46 3/4

6 9/166 9/16

7

1/41/41/4

1 7/81 7/82 3/8

102 102 124

2 x 3

38HC10X-12038HC12X-12038HC13X-120

150#300#600#

150# 14 1/214 1/214 1/2

4 7/84 7/84 7/8

5 3/85 3/85 3/8

1/161/161/4

1 1/41 1/41 1/4

45 55 75

38HC14X-12038HC15X-12038HC16X-120

900#1500#2500#

300#/600# 15 5/815 5/816 1/4

6 3/46 3/46 3/4

6 9/166 9/16

7

1/41/41/4

1 7/81 7.82 3/8

102 102 124

A

B

C

E F

21

Dimensions and Weights: API Nozzle

General Notes: 1. For liquid service valves with standard size connections (L in the type number), use the standard type number dimensions, i.e. 38HC10-120. For liquid service valves with oversize connections (Y in the type number), use the oversize type number dimensions, i.e. 38DC10X-120.2. Valves with ring joint inlet connections available on application only. Consult the Factory.3. For modulating valves, add 2 1/2″ to the A dimension.


ANSI Flange Class


Weight Lbs. Inlet

RFOulet

RF A B C E F

2 x 3

38JC10-12038JC12-12038JC13-120

150#300#600#

150# 14 1/214 1/214 1/2

4 7/84 7/84 7/8

5 3/85 3/85 3/8

1/161/161/4

1 1/41 1/41 1/4

45 55 75

38JC14-12038JC15-12038JC16-120

900#1500#2500#

300#/600#15 5/815 5/816 1/4

6 3/46 3/46 3/4

6 9/166 9/16

7

1/41/41/4

1 7/81 7/82 3/8

102 102 124

3 x 4

38JC10X-12038JC12X-12038JC13X-120

150#300#600#

150#17 1/817 1/817 3/8

6 3/86 3/86 3/8

6 1/86 1/86 3/8

1/161/161/4

1 1/41 1/41 1/2

85 95 100

38JC14X-12038JC15X-120

900#1500# 300# 18 5/8

18 5/87 1/87 1/8

7 1/27 1/2

1/41/4

2 1/42 1/4

172 187

3 x 4

38KC10-12038KC12-12038KC13-120

150#300#600#

150#17 1/817 1/817 3/8

6 3/86 3/86 3/8

6 1/86 1/86 3/8

1/161/161/4

1 1/41 1/41 1/2

95 105 110

38KC14-12038KC15-120

900#1500# 300# 18 5/8

18 5/87 1/87 1/8

7 1/27 1/2

1/41/4

2 1/42 1/4

172 187

3 x 4

38LC10-12038LC12-12038LC13-120

150#300#600#

150#17 1/817 1/817 3/8

6 3/86 3/86 3/8

6 1/86 1/86 3/8

1/161/161/4

1 1/41 1/41 1/2

105 115 125

38LC14-12038LC15-120

900#1500# 300# 18 5/8

18 5/87 1/87 1/8

7 1/27 1/2

1/41/4

2 1/42 1/4

172 187

4 x 638LC10X-12038LC12X-12038LC13X-120

150#300#600#

150#19 3/4 19 3/419 3/4

8 1/48 1/48 1/4

7 3/47 3/47 3/4

1/161/161/4

1 3/41 3/41 3/4

120 140 145

4 x 638MC10-12038MC12-12038MC13-120

150#300#600#

150#19 3/4 19 3/419 3/4

8 1/48 1/48 1/4

7 3/47 3/47 3/4

1/161/161/4

1 3/41 3/41 3/4

130 140 150

4 x 638NC10-12038NC12-12038NC13-120

150#300#600#

150#19 3/4 19 3/419 3/4

8 1/48 1/48 1/4

7 3/47 3/47 3/4

1/161/161/4

1 3/41 3/41 3/4

130 140 155

4 x 638PC10-12038PC12-12038PC13-120

150#300#600#

150#19 3/4 19 3/419 3/4

8 1/48 1/48 1/4

7 3/47 3/47 3/4

1/161/161/4

1 3/41 3/41 3/4

130 140 155

6 x 838QC10-12038QC12-12038QC13-120

150#300#600#

150#24 1/8 24 1/824 3/8

9 1/29 1/29 1/2

9 7/16 9 7/16 9 11/16

1/161/161/4

1 7/81 7/82 1/4

200 220 270

6 x 838RC10-12038RC12-12038RC13-120

150#300#600#

150#24 1/8 24 1/824 3/8

9 1/29 1/29 1/2

9 7/16 9 7/16 9 11/16

1/161/161/4

1 7/81 7/82 1/4

230 270 300

8 x 10 38TC10-12038TC12-12038TC13-120

150#300#600#

150#28 1/228 1/2 29 3/8

11 1111

10 7/8 10 7/8

11 11/16

1/161/161/4

1 5/81 5/82 3/16

450 500 700

3800 Series Full Port Design: Dimensions & Weights

A

B

C

E F

22

General Notes: 1. For liquid service valves with standard size connections (L in the type number), use the standard type number dimensions, i.e. 38HC10-120. For liquid service valves with oversize connections (Y in the type number), use the oversize type number dimensions, i.e. 38DC10X-120.2. Valves with ring joint inlet connections available on application only. Consult the Factory.3. For modulating valves, add 2 1/2″ to the A dimension.


ANSIFlange Class


Weight Lbs. Inlet

RFOulet

RF A B C E F

1 1/2 x 2

381C10-120381C12-120381C13-120

150#300#600#

150#13 1/213 1/213 1/2

4 3/44 3/44 3/4

4 7/84 7/84 7/8

1/161/161/4

1 1/81 1/81 1/8

35 35 40

381C14-120381C15-120381C16-120

900#1500#2500#

300#14 1/214 1/214 5/8

5 1/25 1/25 1/2

5 7/85 7/85 7/8

1/41/41/4

1 9/161 9/162 1/8

71 71 85

1 1/2 x 3

381C10X-120381C12X-120381C13X-120

150#300#600#

150#13 1/213 1/213 1/2

4 7/84 7/84 7/8

5 1/85 1/85 1/8

1/161/161/4

1 3/161 3/161 3/16

35 35 40

381C14X-120381C15X-120381C16X-120

900#1500#2500#

300#14 3/414 3/414 7/8

6 3/46 3/46 3/4

6 3/86 3/86 3/8

1/41/41/4

1 9/161 9/162 1/8

81 81 96

2 x 3

382C10-120382C12-120382C13-120

150#300#600#

150#14 1/214 1/214 1/2

4 7/84 7/84 7/8

5 3/85 3/85 3/8

1/161/161/4

1 1/41 1/41 1/4

50 60 80

382C14-120382C15-120382C16-120

900#1500#2500#

300#/600#15 5/815 5/816 1/4

6 3/46 3/46 3/4

6 9/166 9/16

7

1/41/41/4

1 7/81 7/82 3/8

102 102 124

3 x 4

383C10-120383C12-120383C13-120

150#300#600#

150#17 1/817 1/817 3/8

6 3/86 3/86 3/8

6 1/86 1/86 3/8

1/161/161/4

1 1/41 1/41 1/2

90 100 105

383C14-120383C15-120

900#1500# 300# 18 5/8

18 5/87 1/87 1/8

7 1/27 1/2

1/41/4

2 1/42 1/4

172 187

4 x 6384C10-120384C12-120384C13-120

150#300#600#

150#19 3/4 19 3/419 3/4

8 1/48 1/48 1/4

7 3/47 3/47 3/4

1/161/161/4

1 3/41 3/41 3/4

135 145 160

6 x 8386C10-120386C12-120386C13-120

150#300#600#

150#24 1/8 24 1/824 3/8

9 1/29 1/29 1/2

9 7/16 9 7/16 9 11/16

1/161/161/4

1 7/81 7/82 1/8

235 275 305

8 x 10 388C10-120388C12-120388C13-120

150#300#600#

150#28 1/228 1/2 29 1/4

11 1111

10 7/8 10 7/8

11 11/16

1/161/161/4

1 5/81 5/82 3/16

460 510 710

23

Farris Engineering Products

Process Pressure Relief Valves

Test Stands

Special Purpose Pressure Relief Valves

Steam Safety Valves

MODELS T1500 & T6000 • Air & Water Testing• Maximum Pressures of 1500 psig and

6000 psig• Test Valves to 8" Inlet Size• Stainless Steel Test Drum & Test Table• Digital Test Gauge

SERIES 6400/6600 • ASME NB Section I & VIII Certifi ed:

Steam & Air• Sizes: 1" x 2" to 4" x 6"• Pressure Range: 15 psig to 1500 psig• Temperature Range: -20°F to +1000°F• Materials: Carbon and Stainless Steel• Options: Exposed Spring & Closed

Bonnet

SERIES 1890/1896M • ASME NB Certifi ed: Air, Steam & Water• Sizes: 1/2" x 1" & 3/4" x 1" (1890)

1/2" x 3/4" & 3/4" x 3/4" (1896M)• Pressure Range:

15 psig to 800 psig (1890) 15 psig to 300 psig (1896M)

• Temperature Range: -20°F to +750°F (1890) -450°F to +400°F (1896M)

• Materials: Stainless Steel Body & Trim (1890)Brass Body & Trim, Bronze Bonnet (1896M)

SERIES 4200 • ASME NB Section I & VIII Certifi ed:

Steam & Air• Sizes 1 1/4" x 1 1/2" to 6" x 8"• Pressure Range: 15 psig to 1000 psig• Temperature Range: -20°F to +1000°F• Materials: Carbon / Alloy St. &

Stainless Steel.

SERIES 3800 Pilot Operated • ASME NB Certifi ed: Air, Steam

& Water• Sizes: 1" x 2" to 12" x 16"

• Pressure Range: 15 psig to 6170 psig• Temperature Range: -450°F to +500°F• Materials: Steel Body & Bonnet,

Stainless Steel Trim• Options: Modulating Pilot Control,

Complete 316 Stainless Steel Construction

SERIES 2700 • ASME NB Certifi ed: Air, Steam & Water• Sizes: 1/2" x 1" to 1-1/2" x 2-1/2"• Pressure Range: 15 psig to 6500 psig• Temperature Range: -450°F to +750°F• Materials: Stainless Steel Body & Trim,

Carbon Steel Bonnet• Options: Stainless Steel, Monel &

Hastelloy Materials, O-Ring Seats, Flanged, Socket Weld, Welding Nipple, & Sanitary Connections

SERIES 2850/2856 • ASME NB Certifi ed: Air & Steam• Sizes: 3/4" x 1" to 1-1/2" x 2" (2850)

3/4" x 1-1/4" to 2" x 3" (2856)• Pressure Range: 15 psig to 300 psig• Temperature Range:

-20° F to +750°F (2850) -450° F to +400°F (2856)

• Materials: Stainless Steel Body & TrimSteel Bonnet (2850)Brass Body & Trim, Bronze Bonnet (2856)

SERIES 2600/2600L • ASME NB Certifi ed: Air, Steam & Water• Sizes: 1" x 2" to 20" x 24"• Pressure Range: 15 psig to 6000 psig• Temperature Range: -450°F to +1500°F• Materials: Carbon Steel, Stainless,

Monel & Hastelloy C• Options: Balanced Bellows, O-Ring

Seat, Open Bonnet

Farris Engineering Products & Services

© 2008 Farris EngineeringPrinted in USA

10/08 5M-3800 R6

Process Pressure Relief ValvesSeries 2600 ASME NB Certifi ed for Air, Steam and WaterSeries 2700 ASME NB Certifi ed for Air, Steam and WaterSeries 3800 ASME NB Certifi ed for Air, Steam and WaterSeries 1890/1896M ASME NB Certifi ed for Air, Steam and WaterSeries 2850/2856 ASME NB Certifi ed for Air and SteamSeries 69 Liquid ServiceSeries 88/89 ASME NB Certifi ed for Air and SteamSeries 140 Air ServiceSeries 570 ASME NB Certifi ed for Air and Steam

Steam Safety ValvesSeries 4200 ASME NB Certifi ed for Steam – Section I & VIIISeries 6400/6600 ASME NB Certifi ed for Steam – Section I & VIIISeries 560 ASME NB Certifi ed for Steam – Section I & VIII

Universal Test StandPRV Test Stands with Air and Water Test Capability

SizeMaster™ Mark IVPressure Relief Valve Engineering Software for Sizing and Selection

The following is a list of Farris approvals currently on record:• ASME “V”, “UV” and “NV” • National Board “NB” • ISO 9001-2000• US Coast Guard • PED 97/23/EC (European Pressure Equipment Directive)• ATEX 94/9/EC (European Potentially Explosive Atmospheres)• Canadian TSSA Registration• CSQL (China Safety Quality License)• GOST-R and GGNT (Russian Certifi cation and Permits)• First Point Assesment Limited

10195 Brecksville Road, Brecksville, OH 44141 USA • Telephone: 440-838-7690 • Fax: 440-838-7699 • www.farrisengineering.comFacilities: Brecksville, Ohio USA; Brantford, Ontario; Edmonton, Alberta, Canada; Kettering, Northants, UK; Delhi, India; Tianjin, ChinaOffi ces Worldwide: For a listing of our global sales network, visit our website at www.farrisengineering.com.

While this information is presented in good faith and believed to be accurate, Farris Engineering, division of Curtiss-Wright Flow Control Corporation, does not guarantee satisfactory results from reliance on such information. Nothing contained herein is to be construed as a warranty or guarantee, expressed or implied, regarding the performance, merchantability, fi tness or any other matter with respect to the products, nor as a recommendation to use any product or process in confl ict with any patent. Farris Engineering, division of Curtiss-Wright Flow Control Corporation, reserves the right, without notice, to alter or improve the designs or specifi cations of the products described herein.

FAST Centers (Farris Authorized Service Team)“Understanding what the Customer wants…making it happen!”

• Worldwide Network of Service Centers with Factory Trained Technicians• Local Inventory with 24 hour a day / 7 day a week support• Access to Worldwide Farris Inventory through the Web• ASME/National Board approved Assembly & Test Facilities• Application, Sizing & Selection Support

Farris Engineering

division of Curtiss-Wright Flow Control Corporation

pilot operated pressure relief valvesasme code section viii for air, gas, vapor, and liquid...

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