Kunkle Models 1 and 2 Brass Safety Valves
ASME Section VIII, Air/Gas or Steam, 'UV' National Board Certified

Model Descriptions

Model 1 - Top Outlet
Model 2 - Side Outlet

Pressure and Temperature Limits

5 to 250 psig -60° to 406°F

Applications

• Air and non-hazardous gas service.
• Air/Gas Compressors - portable or stationary
• Pressure Vessels - including tanks, receivers, intercoolers, aftercoolers
• Steam turbines kettles, other steam-processing equipment

Options

• Nickel plating for use on institutional equipment
• Vibration dampener on lift lever

Features and Benefits

• Compact assembly allows minimum space requirements
• Precision lapped, metal-to-metal beveled seat provides premium shutoff
• Adjustable blowdown for precise opening, with minimum preopen or simmer, and exact blowdown control
• Top or side outlet available

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Kunkle Models 19, 19M, 20, 20M, 20MP, 200A, 200H
Non-code Bronze Liquid Relief Valves

Model Descriptions

• Model 19: All bronze, equipped with handwheel for easy adjustment.
• Model 19M: Same as Model 19 except SS trim (seat and disc). (Available 2 1/2-inch and 3-inch only). For higher pressure settings or severe applications.
• Model 20: All bronze, with pressure-tight cap. Suitable for maximum back pressure of 50 psig.
• Model 20M: Same as Model 20 except SS trim (available in 2 1/2-inch and 3-inch only)(seat and disc). For higher pressure settings or severe applications. Maximum back pressure of 50 psig.
• Model 20P: Same as Model 20 except with packed lift lever. Suitable for maximum back pressure of 50 psig.
• Model 20MP: Same as Model 20M except with packed lift lever. Maximum back pressure of 50 psig.
• Model 200A: Special non-chattering design. Recommended for light oils and continuous bypass or pressure regulation. UL listed for light oil service. Available 3/4-inch through 1 1/2-inch sizes. Female NPT connections only.
• Model 200H: Same as Model 20. UL listed for use with fuel oils. Available 3/4-inch through 2-inch sizes.

Pressure and Temperature Limits

• Model 19, 20: 1 to 300 psig -60° to 406°F
• Models 19M, 20M: 1 to 500 psig -60° to 406°F
• Models 200A, 200H: 10 to 200 psig -60° to 406°F

Applications

• Non-Code liquid relief
• Overpressure relief and protection of pumps, tanks, lines and hydraulic systems
• Pressure regulation
• Continuous bypass relief

Options

• Available with optional female NPT inlet or flanged inlet and outlet connections.
• Male x Female NPT connections standard.
• Female x Female connections available.

Features and Benefits

• Inlet and outlet connections integrally cast into body to permit easy inspection and servicing without disconnecting piping.
• Lapped beveled seats for optimum performance.
• Stainless Steel Spring for optimum corrosion resistance.
• Optional Flange connections available

Model Descriptions

• Model 19: All bronze, equipped with handwheel for easy adjustment.
• Model 19M: Same as Model 19 except SS trim (seat and disc). (Available 2 1/2-inch and 3-inch only). For higher pressure settings or severe applications.
• Model 20: All bronze, with pressure-tight cap. Suitable for maximum back pressure of 50 psig.
• Model 20M: Same as Model 20 except SS trim (available in 2 1/2-inch and 3-inch only)(seat and disc). For higher pressure settings or severe applications. Maximum back pressure of 50 psig.
• Model 20P: Same as Model 20 except with packed lift lever. Suitable for maximum back pressure of 50 psig.
• Model 20MP: Same as Model 20M except with packed lift lever. Maximum back pressure of 50 psig.
• Model 200A: Special non-chattering design. Recommended for light oils and continuous bypass or pressure regulation. UL listed for light oil service. Available 3/4-inch through 1 1/2-inch sizes. Female NPT connections only.
• Model 200H: Same as Model 20. UL listed for use with fuel oils. Available 3/4-inch through 2-inch sizes.

Pressure and Temperature Limits

• Model 19, 20: 1 to 300 psig -60° to 406°F
• Models 19M, 20M: 1 to 500 psig -60° to 406°F
• Models 200A, 200H: 10 to 200 psig -60° to 406°F

Applications

• Non-Code liquid relief
• Overpressure relief and protection of pumps, tanks, lines and hydraulic systems
• Pressure regulation
• Continuous bypass relief

Options

• Available with optional female NPT inlet or flanged inlet and outlet connections.
• Male x Female NPT connections standard.
• Female x Female connections available.

Features and Benefits

• Inlet and outlet connections integrally cast into body to permit easy inspection and servicing without disconnecting piping.
• Lapped beveled seats for optimum performance.
• Stainless Steel Spring for optimum corrosion resistance.
• Optional Flange connections available

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Kunkle Model 30
ASME Section VIII Air/Gas, 'UV', National Board Certified Safety valves

Model Descriptions
Model 30: Brass, Top Venting

Pressure and Temperature Limits
60 to 4000 psig -20° to 300°F

Applications

• Small to medium size, multi-stage, air compressors, intercoolers, aftercoolers, instrument/control air lines and systems
• Air tanks/receivers and pressurized equipment

Options
No Options Available

Features and Benefits
Top-guided disc provides optimum performance.

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Kunkle Models 40R, 40RL
Non-code Steam Service, Sentinel Relief Valves

Model Descriptions
Model 40R: 1/2-inch or 3/4-inch male NPT inlet with top discharge to give visible warning of system overpressure.
Model 40RL: Same as Model 40R with plain lift lever.

Note: For other valves suitable for sentinel (warning) service, see Model 1 and Models 264, 265.

Pressure and Temperature Limits
1 to 400 psig -60° to 850°F

Applications

• Sentinel (warning) on steam equipment. Intended as audible warning device, not for pressure relief.
• Steam turbines.

Options
No Options Available

Features and Benefits

• All parts are Stainless Steel
• Precision lapped beveled seats for optimum performance.
• Pivot between spring and disc corrects misalignment and compensates for spring side thrust.

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Kunkle Models 71S, 171, 171P, 171S
Liquid Relief Valves 

Model Descriptions
Model 71S: Cast iron body with SS seat and disc. Pressure-tight hood.
Model 171: CS and SS seat and disc. Pressure-tight hood.
Model 171P: Same as 171 with packed lift lever.
Model 171S: All 316 SS construction including spring. Pressure-tight hood.
Model 171S Variation 02: Same as 171S with packed lift lever.

Pressure and Temperature Limits
Models 71S: 1 to 250 psig -20^o to 406^oF
Models 171, 171P, 171S, 171SP: 1 to 400 psig -20^o to 406^o

Applications
* Overpressure relief and protection of pumps, tanks, lines and hydraulic systems.
* Acid, caustic, ammonia and other corrosive liquids requiring iron, steel or Stainless Steel materials.
* Pressure regulation.
* By-pass relief.
* All 316 Stainless Steel Model 171S suitable for sanitary/edible applications.

Options
SS springs.

Features and Benefits
* Suitable for back pressure to 50 psig.
* Seats lapped for optimum performance.
* Ball bearing pivot between disc and spring corrects misalignment and compensates for spring side thrust.

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Kunkle Models 91, 218, 228
Cast Iron Liquid Relief Valves

Model Descriptions

• Model 91: Bronze trim, with pressure-tight cap. Suitable for maximum back pressure of 60 psig.
• Model 218: Bronze trim, UL and FM approved for fire pump installations. Special design offers minimum set pressure of 60 psig. Easily adjustable with handwheel to 200 psig (175 psig with optional 125# inlet flange).
• Model 228: Bronze trim, with pressure-tight cap. UL and FM approved for fire pump installations. Suitable for maximum back pressure of 60 psig.

Pressure and Temperature Limits

• Model 91: 5 to 400 psig -20° to 406°F
• Models 218, 228: 60 to 200 psig -20° to 406°F

Furnished standard with ANSI rated B16.1 - 250# inlet flange and ANSI B16.1 - 125# outlet flange.

Applications

• Fire Pump Service, UL and FM approved. (Models 218, 228)
• Overpressure relief and protection of pumps, tanks, lines and hydraulic systems.
• Pressure regulating.

Options

• SS trim. (insert and disc) (Variation 02)
• Female x Female NPT connections. (1 1/2-inch through 4-inch sizes)
• Inlet and outlet flanges per ANSI B16.34, 1-inch - 125#. Limited to 175 psig maximum set pressure.

Features and Benefits

• Bolted bonnet permits easy inspection and servicing without removal from system.
• Quality cast iron body and bonnet, insert and disc are available in either bronze or Stainless Steel and lapped for optimum performance.
• Springs are steel with plating for corrosion protection.
• High lift, wing-guided disc offers high relieving capacity. Pivot between disc and spring corrects misalignment and compensates for spring side thrust.

Kunkle Model 140
Stainless Steel Liquid Safety Relief Valves

Model Descriptions
Model 140: Stainless Steel, Side Outlet.

Pressure and Temperature Limits
10 to 300 psig -60° to 406°F

Applications
A general utility valve of all SS construction, including spring, for liquid

Options
No Options Available

Features and Benefits

• Compact design requires minimum installation space.
• Angle lapped seat provides tight shut-off.

Kunkle Models 189, 363, 389
ASME Section VIII, Air/Gas Cryogenic, 'UV' National Board Certified Safety Valves

Model Descriptions

• Model 189: Bronze housing with SS trim (nozzle and disc) with Teflon seat/seal in disc. Plain lift lever.
• Model 189C: Same as Model 189 except pressure tight cap for gas service only. Suitable for maximum back pressure of 50 psig.
• Model 189P: Same as Model 189 except pressure tight packed lift lever. Suitable for maximum back pressure of 50 psig.
• Model 363: Bronze housing with SS trim (nozzle and disc) with Teflon seat/seal in disc. Plain lift lever. 1000 psig maximum set pressure.
• Model 363C: Same as Model 363 except pressure tight cap for gas service only. Suitable for maximum back pressure of 50 psig. 1000 psig maximum set pressure.
• Model 363P: Same as Model 363 except pressure tight cap for gas service only. Suitable for maximum back pressure of 50 psig. 1000 psig maximum set pressure.
• Model 389C: All SS with Teflon seat/seal in disc. Pressure tight cap for gas service only. Suitable for a maximum back pressure of 50 psig.
• Model 389P: Same as Model 389C except pressure tight packed lift lever. Suitable for maximum back pressure of 50 psig.

Pressure and Temperature Limits

• Model 363: 50 to 1000 psig -320° to 350°F
• Model 189: 1000 to 2500 psig -320° to 350° F
• Model 389: 50 to 2500 psig -320° to 350°F

Applications

• Cryogenic 'cold' and liquefied air, oxygen and gas service.
• Multi-stage air and gas compressors, intercoolers, aftercoolers and receivers.
• Thermal expansion relief and/or full rated capacity discharge.
• Air, gas and liquefied gas lines and systems.

Options
No Options Available

Features and Benefits

• Unique three-piece disc assembly (with Teflon seat/seal) offers superior 'leak-free' performance over the entire pressure/temperature operating range.
• Control ring offers precise adjustment of blowdown.
• Pivot betwee disc and spring corrects for all misalignment and compensates for spring side thrust.
• Every valve 100% tested/inspected for set pressure, blowdown and leakage.
• All adjustments are factory sealed to prevent tampering and disassembly.

Kunkle Models 215V, 337
ASME Section VIII, Air/Gas Vacuum, 'UV' National Board Certified Safety Valves

Model Descriptions

• Model 337: Has 'pull-ring' lift device for easy manual testing.
• Model 215V: Model used for Vacuum service.

Pressure and Temperature Limits

• Model 337: 1 to 60 psig -20° to 406°F
• Model 215V: 2-inch HG to 29-inch HG -20° to 400°F

Applications

• Protection of low to medium pressure high volume blowers, compressors and pneumatic conveying systems.
• Bulk hauling trailers/equipment.
• Light gauge tanks.
• Protection of high volume vacuum pumps and conveying systems.

Options
SS trim. (nozzle and disc) (Variation 03)

Features and Benefits

• Large nozzle design provides high capacity.
• Flat bronze valve seats are lapped for optimum performance.
• Warn ring offers easy adjustablility for precise opening with minimum pre-open or simmer and exact blowdown control.
• Pivot between disc and spring corrects misalignment and compensates for spring side thrust.

Kunkle Models 230, 330, 330S, 333S - Relief Valves
ASME Section VIII, Gas, 'UV' National Board Certified

Model Descriptions

• Model 230: 1/4-inch Male NPT - 300/1500 psig.
• Model 330: 1/4-inch Male NPT - 1000/5500 psig. Aluminum housing, SS trim (seat and disc with synthetic insert). Sidewall discharge.
• Model 330S: Same as Model 330 except SS body suitable for 2000/6500 psig.
• Model 333S: Same as 330S except 1/2-inch Female NPT side outlet. Pressure-tight cap.

Pressure and Temperature Limits

• Model 230: 300 to 1500 psig -20° to 185°F
• Model 330: 1000 to 5500 psig -20° to 185°F
• Model 330S: 2000 to 6500 psig -20° to 185°F
• Model 333S: 2000 to 6500 psig -20° to 185°F

Applications

• Multi-stage high pressure compressors, intercoolers and aftercoolers.
• High pressure receivers and storage bottles.
• Thermal expansion relief.

Options
No Options Available

Features and Benefits

• Lightweight aluminum construction. Resistant to environmental and internal corrosion.
• Aluminum parts are anodized for corrosion resistance.
• Model 230 is direct spring-loaded design with synthetic disc insert.
• Model 330 series incorporates a differential mechanism which maintains a predetermined seat-contact load.
• The full spring load is never imparted to synthetic disc insert (models 330, 330S, and 333S only).
• Seat tightness increases to a maximum as inlet pressure approaches the opening pressure.

Kunkle Models 264, 265, 266, 267, 264P, 265P, 266P, 267P
Non-Code Liquid Relief, ASME Section VIII, Air/Gas and Steam, National Board Certified

Model Descriptions

• Model 264: CS housing with 316 SS trim (nozzle and disc), SS spring. Pressure-tight cap.
• Model 265: Same as Model 264 except high-temperature alloy spring.
• Model 266: Same as Model 264 except all 316 SS materials.
• Model 267: Same as Model 266 except high-temperature alloy spring.
• Model 264P: Same as Model 264 with pressure-tight packed lift lever.
• Model 265P: Same as Model 265 with pressure-tight packed lift lever.
• Model 266P: Same as Model 266 with pressure-tight packed lift lever.
• Model 267P: Same as Model 267 with pressure tight packed lift lever.

Pressure and Temperature Limits

• Models 264, 266: 4 to 3300 psig -20° to 550°F
• Models 265, 267: 4 to 3300 psig -20° to 750°F
• Maximum back pressure 400 psig.

Applications

• Protection of pumps, compressors, pressure vessels or systems handling corrosive fluids or vapors at high pressure and/or temperature.
• Sentinel (warning) on steam equipment.

Options
No Options Available

Features and Benefits

• Top-guided design offers high capacity with .110 in 2 orifice area.
• Ball bearing pivot between disc and spring corrects misalignment and compensates for spring side thrust.
• Every valve 100% tested/inspected for pressure setting and leakage.
• Standard outlet with 1-inch Female NPT.

Kunkle Model 537
ASME Section IV, Low Pressure Hot Water Boilers, 'HV', National Board Certified

Model Descriptions
Model 537: Bronze for 3/4-inch and 1-inch models, Cast iron for 1-1/2-inch and 2-inch models.

Pressure and Temperature Limits
15 to 160 psig -20°F to 250°F

Applications
Hot water boiler, heat exchangers and generators.

Options
No Options Available

Features and Benefits

• Extra heavy construction provides long life.
• Top guided disc assembly incorporates resilient seal in seating area.
• An isolating diaphragm protects working parts from corrosion caused by discharged liquid
• Pivot between disc and spring corrects for misalignment and compensates for spring side thrust.
• These safety relief valves serve the dual purpose of relieving (1) over pressure created by thermal expansion under normal 'on and off' firing conditions and (2) over pressure in the form of water or steam created in over-firing due to failure of electrical or other controls.

Kunkle Models 541, 542, 548
ASME Section VIII, Brass, Air/Gas, 'UV', National Board Certified

Model Descriptions
Model 541: 1/4-inch or 1/2-inch Male NPT inlet. Brass body and seat with BUNA-N ball seal.
Model 542: Same as Model 541 except Viton Ball seal.
Model 548: Same as Model 541 except SS ball seal.

Pressure and Temperature Limits
Model 541: 3 to 200 psig -40oF to 200oF
Model 542: 3 to 200 psig -10oF to 300oF
Model 548: 3 to 400 psig -60oF to 300oF

Applications
* Small to medium size, single and multistage, air compressors, intercoolers, aftercoolers, instrument/control air lines and systems
* Air tanks/receivers and pressurized equipment.

Options
No Options Available

Features and Benefits
* High capacity with small size.
* Every valve is 100% tested/inspected for pressure setting and leakage
* Factory sealed to prevent tampering or disassembly.

Kunkle Models 803, 818
Non-code Air/Gas Relief Valves

Model Descriptions

• Model 803: Aluminum.
• Model 818: Carbon Steel.

Pressure and Temperature Limits

• Model 803: 1000 to 6000 psig -20°F to 185°F
• Model 818: 120 to 150 psig -20°F to 300°F

Applications

• Small to medium size, single and multistage, air compressors, intercoolers, after coolers, instrument/control air lines and systems.
• Air tanks/receivers and pressurized equipment.

Options
No Options Available

Features and Benefits

• Every valve is 100% tested/inspected for pressure setting and leakage.
• Factory sealed to prevent tampering or disassembly.

Kunkle Models 910, 911, 916, 917, 920, 921, 927
ASME Section VIII, Air/Gas/Steam/Liquid, 'UV' national Board Certified.

Also available for vacuum service.

Model Descriptions

• Model 910: CS body and bonnet with SS trim.
• Model 911: All SS construction.
• Model 916: Same as Model 910 except resilient seat/seals. Superior 'leak-free' performance.
• Model 917: Same as Model 911 except resilient seat/seals. Superior 'leak-free' performance.
• Model 920: Steel body and bonnet with screwed cap and stainless steel spring for organic fluid vaporizers (ASME Section I - 'V' Special Use or application). 800 psig maximum set pressure.
• Model 921: Steel body and bonnet with plain lift lever and stainless steel spring for forced flow steam generators (ASME Section I - 'V' Special Use or application). 800 psig maximum set pressure.
• Model 927: Steel body and bonnet with packed lift lever and SS spring for high temperature/pressure hot water boilers (ASME Section I - 'V' Special Use or application). 800 psig maximum set pressure.

Pressure and Temperature Limits
See Catalog PDF for Pressure and Temperature Limits

Applications

• Air/gas compressors, intercoolers, aftercoolers
• Liquid filled pressure vessels/systems, ASME Section VIII (UV).
• Pressure vessels - containing gas, air, liquid or steam, including tanks and receivers.
• Vacuum systems including pumps, tanks and equipment.
• Oil/gas separators.
• Overpressure relief and protection of pumps, tanks, lines and hydraulic systems.
• Bypass relief or pressure regulation.
• All stainless steel Model 911 valves may be suitable for sanitary/edible applications.

Options

• Threaded cap
• Threaded cap with gag
• Plain lever
• Plain lever with gag
• Plain lever with vibration dampener
• Packed lever
• Packed lever
• Packed lever with gag

Features and Benefits

• Available with soft seats.
• Threaded cap standard (back pressure tight). Maximum back pressure 50 psig [3.4 barg].
• Hex on valve nozzle provides for easy installation.
• Single control ring offers easy adjustment of blowdown.
• Pivoting disc design offers exceptional seat alignment.
• Guide to nozzle ratio reduces friction.
• Valve bodies are heavy duty castings.
• Full nozzle design for optimum flow performance.
• Threaded side outlet for piped off discharge to eliminate fugitive emissions.

Kunkle Models 912, 913, 918, 919
ASME Section VIII, Steam/Air/Gas/Liquid, 'UV' National Board Certified. Also available for Vacuum Service

Model Descriptions

• Model 912: Full nozzle design. SS warn ring and disc with brass/bronze base. Bronze/brass body and bonnet.
• Model 913: Full nozzle design. Bronze/brass body and bonnet. 316 SS trim (base, disc and disc holder).
• Model 918: Same as Model 912 except resilient seat/seal. Superior 'leak-free' performance.
• Model 919: Same as Model 913 except resilient seat/seals. Superior 'leak-free' performance. Bronze body and bonnet. 316 SS trim (base, disc and disc holder).

Pressure and Temperature Limits

• Models 912, 913, 918, 919 - Steam 3 to 250 psig -60° to 406°F
• Models 912, 918 - Air/Gas/Liquid 3 to 300 psig -60° to 406°F
• Models 913, 919 - Air/Gas/Liquid 3 to 900 psig -60° to 406°F
• Vacuum 6 through 29-inch HG - 300°F
• Maximum back pressure 50 psig - threaded cap and packed lever.

Applications

• Air/gas compressors - intercoolers - aftercoolers.
• Liquid filled pressure vessels/systems - ASME Section VIII (UV)
• Pressure vessels - containing gas, air, liquid or steam. Including tanks and receivers.
• Vacuum systems including pumps, tanks and equipment.
• Optional materials for low temperature - cryogenic applications
• Oil/gas separators.
• Overpressure relief and protection of pumps, tanks, lines, and hydraulic systems.
• By-pass relief or pressure regulation.

Options

• Threaded cap
• Threaded cap with gag
• Plain lever
• Plain lever with gag
• Plain lever with vibration dampener
• Packed lever
• Packed lever
• Packed lever with gag

Features and Benefits

• Available with soft seat.
• Threaded cap is standard (back pressure tight).
• Hex on valve nozzle provides for easy installation.
• Single control ring offers easy adjustability of blowdown.
• Pivoting disc design corrects misalignment and offers exceptional performance.
• Guide to nozzle ratio reduces friction
• Full nozzle design for optimum flow performance.
• Threaded side outlet for piped off discharge to eliminate fugitive emissions.

Kunkle Model 930
ASME Section IV 'Steam' Standard, 'HV', National Board

Model Descriptions
Model 930: High Capacity, Cast Iron.

Pressure and Temperature Limits
15 psig only

Applications
Low pressure steam heating boilers ASME Code Section IV.

Options
No Options Available

Features and Benefits

• Extra high capacity for industrial, commercial and residential low pressure steam heating boilers.
• Large seat area/guide area ratio, along with disc pivot design ensures optimum valve performance.
• Lapped valve seats for optimum performance.
• Reversible lift lever for 'pull-up' or 'pull-down' manual testing.
• Every valve 100% tested/inspected for pressure setting and leakage.
• All adjustments are factory sealed to prevent tampering or disassembly.

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Kunkle Models 6010, 6021, 6030, 6182, 6121, 6130, 6186, 6283, 6221, 6230, 6933, 6934, 6935.
ASME Section I and VIII, Steam, 'V' and 'UV', ASME Section VIII, Air/Gas 'UV' National Board Certified. Models 6933, 6934, and 6935 are ASME Section IV, 'Steam', 'HV' National Board Certified.

Model Descriptions

• Model 6010: Side outlet. Full nozzle design with brass/bronze trim. Available with O-ring seats.
• Model 6021: Same as Model 6010 with Teflon (PFA) disc insert. (use on steam only).
• Model 6030: Same as Model 6010 except SS trim (nozzle and disc). Available with O-ring seats.
• Model 6182: Top outlet. Full nozzle design with bronze/brass trim. Available with O-ring seats.
• Model 6121: Same as Model 6182 with Teflon (PFA) disc insert.
• Model 6130: Same as Model 6182 except SS trim (nozzle and disc). O-ring seat available.
• Model 6186: Top outlet. Full nozzle design with bronze/brass trim. 150 psig maximum set pressure. Replaces Model 86 (original equipment only).
• Model 6283: Side outlet. Full nozzle design bronze/brass trim.
• Model 6221: Same as Model 6283 with Teflon (PFA) disc insert. (Use on steam only).
• Model 6230: Same as Model 6283 except SS trim (nozzle and disc).
• Model 6933: Same as Model 6010 except certified for ASME Section IV. Low pressure steam heating boilers set at 15 psig only.
• Model 6934: Same as Model 6021 except certified for ASME Section IV. Low pressure steam heating boilers set at 15 psig only.
• Model 6935: Same as Model 6030 except certified for ASME Section IV. Low pressure steam heating boilers set at 15 psig only.

Pressure and Temperature Limits

Models 6010, 6021, 6182, 6283, 6221

• Section I Steam 15 to 250 psig -60° to 406°F
• Non-code and Section VIII Steam, Air/Gas 3 to 250 psig -60° to 406°F

Models 6030, 6130, 6230

• Section I Steam 15 to 300 psig -60° to 425°F
• Non-code and Section VIII Steam, Air/Gas 3 to 250 psig -60° to 406°F

Applications

• Steam boilers and generators
• Air/Gas compressors - reciprocating or rotary - portable or stationary, intercoolers and aftercoolers.
• Pressure Vessels - containing steam, air or non-hazardous gas. Including tanks, receivers, sterilizers and autoclaves.
• Pressure Reducing Stations - protection of the discharge or low pressure side of system.

Options
Optional O-Ring Soft Seat Where Indicated

Features and Benefits

• O-ring seats available for exceptional leak-free performance, reduced maintenance cost, multiple cycles with tight shutoff, improved seating integrity.
• Wide hex on valve nozzle provides wrenching service clearance for easy installation.
• Dual control rings offer easy adjustability for precise opening with minimum preopen or simmer and exact blowdown control.
• Ball bearing pivot between disc and spring corrects misalignment and compensates for spring side thrust.
• Grooved piston model disc reduces sliding area and friction.