CROMC-0297-US

Crosby® Styles JOS-E, JBS-E, JLT-JOS-E, JLT-JBS-EPressure Relief Valves for air, gas, steam, vapor, liquid, and two-phase

applications in an exceptionally rugged, standardized design.

Crosby® Styles JOS-E, JBS-E, JLT-JOS-E, JLT-JBS-EPressure Relief Valves for air, gas, steam, vapor, liquid, and two-phase

applications in an exceptionally rugged, standardized design.

Crosby® Styles JOS-E, JBS-E,JLT-JOS-E, JLT-JBS-E Pressure Relief Valve Catalog

© 2001, Crosby reserves the right to changeproduct designs and specifications without notice. 1

Styles JOS-E, JBS-E, JLT-JOS-E, JLT-JBS-EPressure Relief Valve Catalog

Revised March 2001Catalog: 310E-US.01

Contents

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Features and Benefits . . . . . . . . . . . . . . . . . . . . . . . . 3 - 5

JOS-E/JLT-JOS-E Materials of Construction . . . . . . . 6 - 7

JBS-E/JLT-JBS-E Materials of Construction . . . . . . . . 8 - 9

NACE MR0175 Sour Gas Service . . . . . . . . . . . . . . . 10 - 11

Caps and Lifting Levers . . . . . . . . . . . . . . . . . . . . . . . 12

Style Designation Chart . . . . . . . . . . . . . . . . . . . . . . . 13

O-Ring Seat Construction . . . . . . . . . . . . . . . . . . . . . 14

BlockBody Relief Valves . . . . . . . . . . . . . . . . . . . . . . 15

Ordering Information . . . . . . . . . . . . . . . . . . . . . . . . . 15

Crosby Products and Services . . . . . . . . . . . . . . . . . . 16

Warranty Information . . . . . . . . . . . . . . . . . . . . . . . . . 16

0 0 1

U K A SQUALITY

MANAGEMENTQ S 9 0 0 0

LLO

YD

'SR

EGIS

TER QUALITY

ASSU

RA

NC

E



Introduction

Crosby® Styles JOS-E and JBS-E spring-loaded pressure reliefvalves have been engineered to provide high quality over-pressure protection for air, gas, steam, vapor, liquid and two-phase applications in an exceptionally rugged, standardizeddesign to the process and power industries.

Standard sizes are 1 D 2 to 8 T2 10 with inlet flange ratings ofANSI Cl 150, 300, 600, 900, 1500 and 2500. Standard outletflanges are ANSI Cl 150 or Cl 300 depending on valve size orrating. Inlet and outlet center-to-face dimensions conform to APIStandard 526, Flanged Steel Pressure Relief Valves.

Styles JOS-E and JBS-E pressure relief valves aremanufactured in accordance with ASME Pressure Vessel Code,Section VIII and capacities are certified by the National Boardof Boiler and Pressure Vessel Inspectors.

All Crosby pressure relief valve castings and forgings areprocured to ASME/ASTM material specifications and are avail-able in a number of material combinations such as Monel®,Hastelloy® and stainless steel. In addition, Styles JOS-E andJBS-E relief valves offer a number of special materialcombinations such as Titanium, Duplex Stainless Steel andInconel®, and are available on application.

Dimensions of flanges conform to current ANSI Standards. Allsteel raised face flanges are spiral concentric serrated finishwith 45 to 55 grooves per inch and a finish between 125 Raand 200 Ra. Other flange facings, such as Ring Type Joint, areavailable on request.

For information pertaining to sizing and selection, refer to theAGC SafetySize computer sizing program and Pressure ReliefValve Engineering Handbook (Technical Document No. TP-V300).

Notes

1. Monel® and Inconel® are registered trademarks of theInternational Nickel Company, Inc.

2. Hastelloy® is a registered trademark of HaynesInternational, Inc.

Sizes: 1” D 2” to 8” T2 10”

Orifices: 0.110 to 27.872 in2 [71 to 17981 mm2]

Inlet Ratings: ANSI Cl 150, 300, 600, 900, 1500, 2500

Temperature Range: -450°F to +1000°F [-268°C to +538°C]

Pressure Range:JOS-E and JLT-JOS-E: 15 to 6000 psig [1.03 to 413.79 barg]JBS-E and JLT-JBS-E: 25 to 6000 psig [1.72 to 413.79 barg]



Extended Service Life, Reduced Cost of OwnershipSuperior Application Versatility

Improved, Rugged Nozzle Ring Design.

Improved Disc Insert Retention for Ease of Maintenance.

Standard Inconel 625 Bellows and Flange Material forSuperior Corrosion Resistance, Longer Service Life and aWider Range of Applications.

Universal Disc Holder Allows for Simple and Cost-EffectiveConversions from Conventional to Balanced Bellows Design.

Standard Threaded Bellows Design for Ease of Maintenanceand Conversion From Conventional to Balanced BellowsDesign.

Improved Corrosion Resistance with Standard 316 StainlessSteel Adjusting Bolt Locknut and Nozzle Ring Set Screwmaterials.

Style JLT Capacities Certified on Liquids and Gas.

Improved Parts Interchangeability - Regardless of TopConstruction.

Field Proven Style JLT Trim* for Stable, Non-ChatteringOperation on Liquid and Gas Service.* Patented

Standard Chrome Steel Spring for -75°F to +650°F [-28°C to +343°C].

Easily Converted to Any Type Cap or Lifting LeverConstruction, Liquid Trim, Soft-Seat or Balanced BellowsConfigurations.

Full Compliance with ASME Boiler and Pressure Vessel CodeSection VIII and API Standards 526 and 527.

Valve StylesJOS-E JLT-JOS-E

JBS-E JLT-JBS-E

JBS-BP-E JLT-JBS-BP-E

JOS-H-E

These Design Improvements and Material Upgrades, Combined with State-Of-The-Art Manufacturing Facilities, Result in Lower Cost of Ownership to End Users and Enhanced Product Availability from Crosby Factories

as well as Crosby’s Extensive Network of Pressure Management CentersSM .

Style JOS-E



Bellows and Top FlangeCrosby Styles JBS-E and JLT-JBS-E balanced bellows pressurerelief valves provide optimum valve performance when thedeveloped back pressure in exhaust systems or dischargemanifolds becomes excessive.

All standard JBS-E and JLT-JBS-E relief valves feature a standard bellows and top flange (Figure 1) manufactured fromInconel alloy 625 which is a fatigue-resistant material and provides improved corrosion resistance compared to 316Lstainless steel bellows. Inconel® alloy 625 is highly resistant to pitting, crevice corrosion and intergranular attack. The standardization of Inconel® Alloy 625 bellows and top flangeprovides a higher degree of corrosion resistance without thepremium extra charge usually associated with Inconel® bellows.

Ease of Maintenance andComponent InterchangeabilityThe disc insert retention, disc holder and nozzle ring of the JOS-Eand JBS-E have been re-engineered to improve maintenance,minimize spare parts and provide more component partinterchangeability. (Figure 2)

The disc insert is inserted into the disc holder with a retention clipwhich is compressed as it passes through the smallest diameter inthe disc holder recess and then returns to its normal shape once ithas passed through. With the retention clip in its original shape,the disc insert is held securely in place.

A “universal” disc holder allows for simple and cost effectiveconversions from conventional to balanced bellows design as wellas cost-effective bellows replacement. The bellows threads on tothe disc holder with a tailpiece and gasket.

The new nozzle ring encloses the adjustment slot at the bottom ofthe ring giving a more rugged, durable design.

Chrome Steel SpringStandard chrome steel spring material for applications with inlettemperatures up to 650°F [343°C].

Styles JOS-E and JBS-EProduct Features -

Figure 1

Figure 2



Dual CertificationCrosby patented Style JLT (Figure 3) pressure relief valves offera significant increase in capacity at 10% overpressure resultingin the economic use of a smaller valve as well as a reduction in inlet and discharge piping costs. The JLTtrim is a field-proven patented design providing stable, non-chattering operation for liquid service.

The JLT design is also capacity certified on gas and vaporservice and can be applied in two-phase flow applications. TheJLT design is a logical choice for applications where the processfluid may be a liquid or a gas depending on the overpressurecondition.

Bellows ConvertibilityThe Crosby flanged, spring operated pressure relief valve isdesigned and manufactured as a conventional valve and abalanced bellows valve. The conversion from conventionalStyles JOS-E or JLT-JOS-E in 1 D 2 through 8 T2 10 requiresonly the addition of a bellows assembly and bellows tail-piecegasket. No other parts are necessary since all other parts arecompletely interchangeable.

Seat DesignStyles JOS-E and JBS-E relief valves are available with flatmetal-to-metal seats or soft seats. The JOS-E and JBS-E two-piece disc holder/disc insert construction provides thermalbalancing assuring maximum seat tightness, and meets therequirements of API Standard 527, Seat Tightness of PressureRelief Valves.

Where system operating conditions permit, soft seat orelastomer seat construction is available as an option. TheCrosby O-ring soft seat (Figure 4) is a two-seat design, with ametal-to-metal seat located downstream of the soft seat. The O-ring is the primary seal. The secondary flat metal-to-metalseat controls the compression of the O-ring and also serves as asecondary seal should the O-ring be damaged. Elastomeric O-ring soft seat valves are seat tightness tested at 95% of setpressure, exceeding the requirements of API Standard 527.

Standard O-ring materials include Viton®1, BUNA-N, EPR2,TFE3, Silicone Rubber and Kalrez4. Pressure and temperaturelimits of each material are shown on page 16. Other soft seatmaterials such as Chemraz5 and Aflas6 are available onapplication.

Cap, Lifting Lever and Spindle InterchangeabilityAll Crosby JOS-E and JBS-E relief valves use a threadedspindle and drilled and tapped bonnet which permits easy cap orlifting lever conversions, with maximum standardization andinterchangeability of parts. In addition, standard cap and liftinglever designs can be used with in-line test devices.

Styles JOS-E and JBS-EProduct Features -

Figure 3

Figure 4

Notes

1. Reg. U.S. Patent Office for DuPont’s fluoroelastomer.

2. EPR = Ethylene Propylene Rubber.

3. TFE = Tetrafluoroethylene.

4. Reg. U.S. Patent Office for DuPont’s perfluoroelastomer parts.

5. Registered Trademark of Greene, Tweed & Co.

6. Registered Trademark of Asahi Glass Company, Ltd.



Crosby Styles JOS-E and JLT-JOS-E are the standardconventional relief valve designs for applications when thedischarge is to the atmosphere or when the discharge is to alow pressure exhaust system designed to contain the processfluid. Valves subject to flashing fluids may require a balancedbellows type valve (see page 8).

This exceptionally rugged design features a high guidingsurface ratio, corrosion resistant trim, upgraded materials ofconstruction and several other design improvements to ensure

ease of maintenance as well as a greater degree of partsinterchangeability.

For liquid service applications, Style JLT-JOS-E relief valvesprovide stable operating performance using the widely industryrecognized liquid trim design patented by Crosby. The discholder in the liquid trim design has been engineered to allow thevalve to achieve full lift at 10% overpressure without valvechatter.

Styles JOS-E and JLT-JOS-E Standard Materials of Construction

Ref. No. Part Name Standard Material

1 Body (JOS-E and JLT-JOS-E ( )5 and ( )6) ASME SA216 GR. WCB

1 Body (JOS-E and JLT-JOS-E ( )7) ASME SA217 GR. WC6

2 Nozzle 316 Stainless Steel

3 Nozzle Ring 316 Stainless Steel

4 Set Screw 316 Stainless Steel

5 Disc Holder 316L Stainless Steel

8 Disc Insert1 316 Stainless Steel

9 Retention Clip2 Inconel® X750

12 Retainer Screws 316 Stainless Steel

11 O-ring Retainer 316 Stainless Steel

10 O-ring1 Specify

15 Guide ASTM A297 GR. HE SST

16 Spindle 416 Stainless Steel

17 Spindle Cotter Pin Stainless Steel

18 Spring (JOS-E and JLT-JOS-E ( )5) Chrome Steel3

18 Spring (JOS-E and JLT-JOS-E ( )6 and ( ) 7) Alloy Steel 3,4

19 Spring Washers Carbon Steel

20 Bonnet (JOS-E and JLT-JOS-E ( )5 and ( )6) ASME SA216 GR. WCB

20 Bonnet (JOS-E and JLT-JOS-E ( )7) ASME SA217 GR. WC6

21 Bonnet Stud ASME SA193 GR. B7

22 Bonnet Stud Nut ASME SA194 CL 2H

24 Adjusting Bolt 316 Stainless Steel

25 Adjusting Bolt Nut 316 Stainless Steel5

26 Pipe Plug (Bonnet) Carbon Steel

27 Set Screw Gasket1 Organic Fiber Non-Asbestos

28 Guide Gasket1 Organic Fiber Non-Asbestos

34 Seal and Wire Lead and Stainless Steel

35 Seal Clip (Not Shown) Stainless Steel

36 Nameplate (Not Shown) Stainless Steel

40 Threaded Cap Carbon Steel

41 Cap Gasket1 Organic Fiber Non-Asbestos

Notes

1. Recommended Spare Part.

2. Furnished with Disc Insert.

3. Corrosion resistant coating.

4. Crosby may upgrade to Inconel® X750.

5. Class 900#, 1500# nd 2500# inlet ratingsuse 416 Stainless Steel.

Styles JOS-E and JLT-JOS-E Conventional Pressure Relief Valves



40

24

25

34

19

20

18

19

21

22

15

5

34

3

4

8

27

1

2

41

26

16

17

28

29

12

11

10

Style JOS-E(with metal-to-metal seat)

Style JLT-JOS-E(with O-ring seat)

Styles JOS-E and JLT-JOS-E Conventional Pressure Relief Valves



Styles JBS-E and JLT-JBS-E Balanced Bellows Construction

Crosby Styles JBS-E and JLT-JBS-E are pressure relief valvesincorporating a bellows which is balanced to minimize the effectof back pressure on the performance characteristics. Thebalanced bellows design offsets the effects of variable backpressure on valve set pressure. The balanced bellows valve canalso handle applications involving high built-up back pressure.

Additionally, the bellows serves to isolate the guide, spindle,spring and other parts contained in the bonnet chamber fromcorrosive fluids or media such as a highly viscous fluid or slurrywhich could render the relief valve inoperative.

For liquid service applications, Crosby offers Style JLT-JBS-Erelief valves.

The standard bellows assembly of the Crosby Style JBS-E andJLT-JBS-E threads onto the disc holder with a bellows tailpieceand gasket. A welded bellows attachment is available as anoption.

The JBS-E and JLT-JBS-E bellows and bellows flange aresupplied in Inconel 625 as standard material for improveddurability, corrosion resistance and service life.

Styles JBS-E and JLT-JBS-E Standard Materials of Construction

Ref. No. Part Name Standard Material

1 Body (JBS-E and JLT-JBS-E ( )5 and ( )6) ASME SA216 GR. WCB

1 Body (JBS-E and JLT-JBS-E ( )7) ASME SA217 GR. WC6





6C Bellows Flange1 Inconel® 625

6B Bellows1 Inconel® 625

6A Bellows Tailpiece1 316L Stainless Steel

29 Tailpiece Gasket2 Organic Fiber Non-Asbestos

8 Disc Insert2 316 Stainless Steel

9 Retention Clip3 Inconel® X750

12 Retainer Screws 316 Stainless Steel

11 O-ring Retainer 316 Stainless Steel

10 O-ring2 Specify




18 Spring (JBS-E and JLT-JBS-E ( )5) Chrome Steel4

18 Spring (JBS-E and JLT-JBS-E ( )6 and ( )7) Alloy Steel4,5

19 Spring Washers Carbon Steel

20 Bonnet (JBS-E and JLT-JBS-E ( )5 and ( )6) ASME SA216 GR. WCB

20 Bonnet (JBS-E and JLT-JBS-E ( )7) ASME SA217 GR. WC6

21 Bonnet Stud ASME SA193 GR. B7

22 Bonnet Stud Nut ASME SA194 CL 2H

24 Adjusting Bolt 316 Stainless Steel6

25 Adjusting Bolt Nut 316 Stainless Steel

27 Set Screw Gasket1 Organic Fiber Non-Asbestos

28 Guide Gasket2 Organic Fiber Non-Asbestos


35 Seal Clip (not shown) Stainless Steel

26 Nameplate (not shown) Stainless Steel


41 Cap Gasket2 Organic Fiber Non-Asbestos

Notes

1. Subassembly.

2. Recommended Spare Part.

3. Furnished with Disc Insert.

4. Corrosion resistant coating.

5. Crosby may upgrade to Inconel® X750.

6. Class 900#, 1500# nd 2500# inlet ratingsuse 416 Stainless Steel.



Styles JBS-E and JLT-JBS-E Balanced Bellows Construction

40

24

25

34

19

20

18

19

21

22

15

5

34

3

4

8

27

1

2

41

Note: This vent must remainopen on JBS-E andJLT-JBS-E construction

16

17

28

29

9

6C6B6A

Style JBS-E(with metal-to-metal seat)



Level 1 - For applications where compliance with NACEMR0175 is required for wetted parts in the primary(upstream) pressure zone of the pressure relief valve.Materials of construction for Level 1 can be found onpage 8.

Level 2 - For applications where compliance with NACEMR0175 is required for wetted parts in the primary(upstream) and secondary (downstream) pressurezones of the pressure relief valve. The Inconel® 625bellows isolates the valve spring and other criticalcomponents above it from the process fluid.

While the materials recommended for the CrosbyStyle JBS-E and JLT-JBS-E sour gas valves aresuitable for average service conditions, optionalmaterials are available to provide additionalresistance to corrosion beyond the minimumrequirements of the standard.

Ref No. Part Name Standard NACE Material Level 2

1 Body ASME SA216 GR. WCB




6C Bellows Flange1 Inconel® 625

6B Bellows1 Inconel® 625

6A Bellows Tailpiece1 316L Stainless Steel

29 Tailpiece Gasket Organic Fiber Non-Asbestos


8 Disc Insert 316 Stainless Steel

9 Retention Clip Inconel® X750




18 Spring Chrome Steel-Aluminum Metallized

19 Spring Washer Steel

20 Bonnet ASME SA216 GR. WCB

21 Bonnet Stud Alloy Steel2

22 Bonnet Stud Nut Steel2

24 Adjusting Bolt 316 Stainless Steel3


27 Set Screw Gasket Organic Fiber Non-Asbestos

28 Guide Gasket Organic Fiber Non-Asbestos




41 Cap Gasket Organic Fiber Non-Asbestos

Shaded materials indicate variation from standard product.

Notes

1. Subassembly.

2. If Class I or II bolting is required, bonnet studs will beASME A193 Gr B7M HRC-22 maximum and bonnet studnuts will be ASME A194 Class 2HM HRC-22 maximum.

3. Class 900#, 1500# nd 2500# inlet ratings use 416Stainless Steel.

Styles JBS-E and JLT-JBS-E Balanced Bellows Pressure Relief Valves for Sour Gas Service per NACE MR0175

Style JBS-E(with bellows)

40

2425

34

19

20

1819

21

2215

5

34

34

8

2712

41

16

17

28

29

9

6C6B6A



Level 1 - For applications where compliance with NACEMR0175 is required for wetted parts in the primary(upstream) pressure zone of the pressure relief valve.Materials of construction for Level 1 can be found onpage 6.

Level 2 - For applications where compliance with NACEMR0175 is required for wetted parts in the primary(upstream) and secondary (downstream) pressurezones of the pressure relief valve.

While the materials recommended for the CrosbyStyle JOS-E and JLT-JOS-E sour gas valves aresuitable for average service conditions, optionalmaterials are available to provide additionalresistance to corrosion beyond the minimumrequirements of the standard.

Ref No. Part Name Standard NACE Material Level 2

1 Body ASME SA216 GR WCB





8 Disc Insert 316 Stainless Steel

9 Retention Clip Inconel® X750




18 Spring Inconel® X750

19 Spring Washer 316 Stainless Steel

20 Bonnet ASME SA216 GR WCB

21 Bonnet Stud Alloy Steel1

22 Bonnet Stud Nut Alloy Steel1

24 Adjusting Bolt 316 Stainless Steel


26 Pipe Plug (Bonnet) Carbon Steel

27 Set Screw Gasket Organic Fiber Non-Asbestos

28 Guide Gasket Organic Fiber Non-Asbestos




41 Cap Gasket Organic Fiber Non-Asbestos

Shaded materials indicate variation from standard product.

Styles JOS-E and JLT-JOS-E Conventional Pressure Relief Valves for Sour Gas Service per NACE MR0175

Note

1. If Class I or II bolting is required, bonnet studs will beASME A193 Gr B7M HRC-22 maximum and bonnetstud nuts will be ASME A194 Class 2HM HRC-22 maximum.

Style JOS-E

40

2425

34

19

20

1819

21

2215

5

34

3

4

8

2712

41

26

16

17

28

29



Caps and Lifting Levers

Cap

Sealand

Wire

Cap

Spindle

Cap GasketThreaded Cap

Type A Type J(standard)

Test Rod

Cap orCap Top

Spindle

Cap Plug

CapPlug

Gasket

Cap Test RodType B - Threaded CapType E - Packed Lifting LeverType H - Bolted CapType K - Threaded Cap (standard)Type M - Bolted Cap (standard)

Lever NutLever NutLockwasher

Lever

PackingGland

Dog ShaftGasket

Dog Shaft

Packing Gland Sleeve

Packing Gland Nut

Packing

Packed Lifting LeverType D

(Top view of Packing Gland constructionused for special materials)

Lever

Dog Shaft

Cap

O-ring

Dog

ValveSpindle

Lever Nut

Lockwasher

Dog Shaft Bearing

Gasket


(Top view)

Cotter Pin

Cap TopGasket

Dog

DogShaft

Spindle

AdjustingBolt

AdjustingBolt Nut

Seal andWire

Cap Stud Nut

Cap Stud

Cap

Spindle Nut

Cap Top


Cap Gasket

CapSpindle Nut

Regular Lifting LeverType C

Cotter Pin

Pin

Forked Lever

Cotter Pin

Pin Cap SetScrew

Lever

Cap

Cap

Bolted CapType G Type L

(standard)

Cap Stud

Spindle

Cap StudNut

SealandWire



Pressure/TemperatureInlet Flange Range Ratings3

Style Designations

Notes

1. Style designations “JLT-JOS-E”, “JLT-JBS-E”, or “JLT-JBS-BP-E” signify StylesJOS-E, JBS-E or JBS-BP-E with liquid trim for liquid service.

2. Upper temperature limit is +800°F [+427°C] for Style JOS-H-E open bonnet valvefor ASME Code Section VIII steam service.

3. See pages 14 - 43 in Catalog 310 for appropriate maximum set pressures andtemperatures.

4. See pages 12 - 13 in Catalog 310 for complete listings of materials of construc-tion.

5. Larger sizes are available. Ask for Catalog No. 307.

6. ASME Code Section VIII rules require that pressure relief valves for water serviceover +140°F [+60°C], steam and air shall have a lifting device.

* Reg. U.S. Patent Office for DuPont’s fluorocarbon resins.

Available Options

Welded bellows attachment

Flange facings such as ring type joint

Sour gas service materials and certifications

Special Cl 300 outlets (where not standard)

Special Teflon®* (FEP) bellows coating

Special spring coatings or plating

Block bodies

Bonnet and cap inside painting or plastic coating

Bug screens

Special materials not cataloged

Flanges to international standards

Special flanges

Stellited nozzle and disc insert

Special casting or machined surface tests

Special cleaning

Special painting or coatings

Special testing

Steam jacketed bodies

Supplementary loading

Seat TypeStyleSize

Inlet x Orificex Outlet

Material Variations4

Caps and LiftingLevers (Type)

1” D 2”thru8” T2 10”5

JOS-E-Conventional

JBS-E-with bellows

JLT-JOS-E-Conventional withliquid trim1

JLT-JBS-E-Bellowswith liquid trim1

JBS-BP-E-Bellowswith back pressurebalancing piston

JLT-JBS-BP-E-Bellows with liquidtrim and backpressure balancingpiston1

JOS-H-E -Conventional JOSwith open bonnetfor ASME CodeSection VIII steamservice to +800°F[+427°C]2

1 - Cl 150 Flange

2 - Cl 300 Flange

3 - Cl 300 Flange

4*- Cl 600 Flange

5 - Cl 900 Flange

6 - Cl 1500 Flange

7 - Cl 2500 Flange

*Except “T” and “T2”orifice is Cl 300flange *Except for Style

JOS-H-E with openbonnet, chrome steelspring may be used to+800°F [+427C°]

When orderingsoft seats, speci-fy material.

2 - -450°F to -76°F[-268°C to -60°C]

4 - -75°F to -21°F[-59°C to -30°C]

5*- -20°F to +650F[-29°C to +343°C]

6 - +651°F to +800°F[+344°C to +427°C]

7 - +801°F to +1000°F[+428°C to +538°C]

None - Metal

“OR” - O-Ring

None - StandardMaterials

S - All 316 St. St.

S4 - All 316 St. St.except body,bonnet, cap andspring

M - All Monel® withMonel® orInconel spring

M1 - Monel® nozzleand disc insert

M4 - All Monel®except body,bonnet, cap,spring andwashers

M5 - All Monel®except springand washers

H - All Hastelloy® C

H1 - Hastelloy® Cnozzle and discinsert

H4 - All Hastelloy® Cexcept body,bonnet, cap,spring andwashers

H5 - All Hastelloy® Cexcept springand washers

N2 - NACE Level 2JOS-E = Inconel® X750spring, 316 St.St. washers,spindle andadjusting boltJBS-E = AluminumMetallizedSpring

Type J - (Standard)threaded cap

Type K - Threaded capwith test rod

Type C - Regular liftinglever6

Type D - Packed liftinglever6

Type E - Packed liftinglever with testrod6

Type L - Bolted cap

Type M -Bolted capwith test rod

Optional Caps forHeight Restricted

Applications

Type A - Threaded cap

Type B - Threaded capwith test rod

Type G - Bolted cap

Type H - Bolted capwith test rod



EPR = Ethylene Propylene Rubber TFE = Tetrafluoroethylene

Note: Other soft seat materials are available on request. For O-ring seats below -150°F [-101°C] consultCrosby. For steam service, metal-to-metal seats are recommended; consult Crosby if soft seats are required.

O-Ring Soft Seat Materials and Pressure/Temperature Limits

Maximum Set Pressure Limits

Maximum Set PressureOrifice psig barg

D 1480 102

E 1480 102

F 1480 102

G 1480 102

H 1480 102

J 1480 102

K 1480 102

L 1000 68.9

M 1100 75.8

N 1000 68.9

P 1000 68.9

Q 600 41.3

R 300 20.6

T 300 20.6

T2 300 20.6

JBS-E O-RingSoft Seat

JLT-JOS-E O-RingSoft Seat

500

400

300

200

100

50

0

-150

-50

Set Pressure, psigFigures in ( ) are Durometer Hardness Specifications.

-101

-45

-17

93

204

260

15 100 200 300 400 500 600 700 800 900 1000 1200 1400

Inle

t Te

mp

erau

ture

, °F

1480 or max. set pressurerating of the O-ring soft seat valve.

Inle

t Te

mp

erau

ture

, °C

Kalrez® (90)TFE

TFE

Kalrez® (80)Silicone (80)Viton® (75)TFE

Kalrez® (90)Viton® (90)TFE

BUNA-N (70)EPR (80)Kalrez® (80)Silicone (70)Viton® (75)TFE

BUNA-N (60)EPR (70)Silicone (50)

BUNA-N (90)EPR (90)Kalrez® (90)Viton® (90)TFE

BUNA-N (70)EPR (70)

Silicone (70)TFE

TFE TFE

BUNA-N (90)EPR (90)

Silicone (80)TFE

BUNA

-N (5

0)EP

R (7

0)Si

licon

e (5

0)Vi

ton®

(75)

Kalre

z® (8

0)Si

licon

e (5

0)Vi

ton®

(75)

Kalre

z® (8

0)



Crosby BlockBodyTM Pressure Relief Valves provide the solution toapplications involving very high set pressures that exceed standard ranges.

One single Crosby BlockBodyTM Pressure Relief Valve installation canhandle the capacity of multiple API-526 standard valves with:• Fewer potential leak paths.• Fewer spare parts required.• Cost savings on inlet and outlet piping.

Design Details:• Full nozzle design for maximum tightness.• Geometrically designed valve block body and bonnet for weight savings.• Interference fitted inlet studs provided.• Available in orifice sizes from “D” through “T2”.• Materials of construction available for special process applications.• Available in Crosby Styles JOS-E, JBS-E and JLT-E valve designs.

For more information, contact the Factory or your local CrosbyRepresentative.

Ordering Information

The primary purpose of Style JOS/JBS/JLT-E pressure reliefvalves is to protect lives and property. In order to select theproper valve for your application, please provide the informationlisted below. Details of the process fluid and conditions areespecially important. If there is any doubt as to selection orapplication of valves or parts, please contact your local CrosbySales Office or Representative.

Ordering Information Example

Quantity 5

Nominal valve size (inlet x orifice x outlet) 4 x L x 6

Valve style JOS-E-45

Inlet connection rating and facing 600 RF

Outlet connection rating and facing 150 RF

Service (liquid, gas or vapor) Air

Set pressure (psig) 800 psig

Back pressure (psig) if any, and Atmospherewhether constant or variable

Maximum service temperature (°F) Ambient 60°F

Cap or lifting lever type Type C

Valve materials Standard

Seat material Metal-to-metal standard

Code requirements ASME Unfired Pressure Vessel Code Section VIII

Required capacity 45433 SCFM

Accumulation (allowable overpressure) 10%

Molecular weight - vapor -

Specific gravity - gases and liquids 1.0

Viscosity - liquids -

PartsTo order parts, the following information should be included:

1. Quantity

2. Part name, i.e., disc insert

3. Size, style and valve number

4. Assembly number (from valve nameplate)

5. Serial number (from valve nameplate)

6. Original purchase order number (if assembly number has beendestroyed).

Sample Nameplate(Figures shown are for illustrative purposes only.)

Crosby provides special “fast response” delivery service of spareparts to satisfy unplanned parts requirements. Fast responsedelivery service can be initiated by contacting your local Crosbyrepresentative. Emergency delivery service is available directfrom the factory, 24 hours a day, 7 days a week by calling (508) 384-3121.

Springs with Washers To order springs with washers, inaddition to the other information included for "Parts," the requiredvalve set pressure must also be specified. If the spring is for anon-bellows valve, and there is a constant back pressurecondition, that too should be specified. Also specify springmaterial and coating if other than standard.

Replacement Valves To replace a valve in service, theassembly number, serial number, set pressure and previousorder number should be specified.

Crosby BlockBodyTM Pressure Relief Valves



Crosby Products and Services

• Pressure Relief Valves for Air, Steam, Vapor and LiquidService - Spring Loaded and Pilot Operated

• Safety Valves for Fossil and Nuclear Power Plants

• Safety Selector Valve “Switchover” Device for ContinuousRelief Protection

• Pressure/Vacuum Relief Valves for Sanitary, Beverage, Foodand Pharmaceutical Industries

• Valves for Chlorine, Bromine, Fluorine and Other CorrosiveServices

• Valve Test Benches and Silencers

• Set Pressure Verification Device (SPVD) and Valve PositionIndication (VPI) Systems

• Comprehensive Test Facilities for Air, Steam and Water

• Severe Service BlockBodyTM for High Temperature and HIghPressure Applications

• Valve Service, Repair and Reconditioning, and Training

• Engineering Design, Application and Analytical Services

See your local Crosby Representative or Pressure Management CenterSM

Pressure Management Centers

Full Spectrum Services Crosby's Pressure ManagementCentersSM are designed to save you money. Whether or notyour organization performs its own repair and maintenance,Crosby Pressure Management Centers offer Crosby’s completeline of loosely assembled valves, spare parts, field service,valve management programs, and the repair and trainingexpertise required to keep your plants running longer and main-tenance investment at a minimum. Call Crosby Valve or yournearest Crosby Pressure Management Center.

WARNINGThe information contained in this catalog is for informational purposes only. The actual selection of valve products is dependent upon numerous factors and should be made onlyafter consultation with applicable Crosby personnel. Crosby assumes no responsibility for the actual selection of such products and hereby expressly disclaims liability for any andall claims and damages which may result from the use or application of this information or from any consultation with Crosby personnel.

WARRANTY

Anderson Greenwood Crosby, Crosby Valve and Engineering Division, Anderson Greenwood/Crosby Valve Division, or Crosby Valve Sales and ServiceCorporation (collectively “Crosby”) hereby warrants that the goods delivered under contract will be free from defect in material and workmanship for a periodof 18 months from shipment or 12 months from installation, whichever is earlier. Within this period, any of our products claimed defective may be returned toour factory after examination by us, the products will be repaired or replaced free of charge, F.O.B. our factory. Such defects shall be exclusive of the effectsof corrosion, erosion, normal wear or improper handling or storage.

Crosby makes no representation, warranty or guarantee, express or implied, with regard to our products except as specifically stated. When in doubt as tothe proper application of any particular product, you are invited to contact your nearest CROSBY office or representative. We cannot otherwise be responsi-ble for the selection of unsuitable equipment. Suitability of the material and product for the use contemplated by the buyer shall be the sole responsibility ofthe buyer.

Except as specifically set forth above and for warranty of title, CROSBY MAKES NO WARRANTY, EXPRESS OR IMPLIED, OF ANY KIND INCLUDINGWITHOUT LIMITATION, WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.

In no event will CROSBY be liable for incidental or consequential damages.

WARNINGThe Product is a safety related component intended for use in critical applications. The improper application, installation or maintenance of the Product orthe use of parts or components not manufactured by Crosby may result in failure of the Product. The advice of a qualified engineer should be sought prior toany use of the Product.

Any installation, maintenance, adjustment, repair or test performed on the Product must be done in accordance with the requirements of all applicableCodes and Standards.

The information, specifications and technical data (the “Specifications”) contained in this document are subject to change without notice. Crosby does notwarrant that the Specifications are current and assumes no responsibility for the use or misuse thereof. The Purchaser should verify that there have been nochanges to the Specifications prior to use.

Crosby® Styles JOS-E, JBS-E, JLT-JOS-E, JLT-JBS-E Revised March 2001Catalog: 310E-US.01

Corporate Headquarters and Operations CenterP.O. Box 944Stafford, Texas 77497, USATelephone: (281) 274-4400, Fax: (281) 240-1800

Operations Centers43 Kendrick Street, Wrentham, Massachusetts 02093-0308, USATelephone: 1-508-384-3121, Fax: 1-508-384-8675

Crosby Road, Market Harborough, Leics LE16 9EE, UKTelephone: 44-1858-467281, Fax: 44-1858-434728

No. 45, Tuas Avenue 9, Jurong, Singapore 639 189Telephone: 65-862-2177, Fax: 65-862-1778

www.andersongreenwood.com

© 2001 Anderson Greenwood Crosby Printed in USA JOSE-10M-03/01

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