Relief Valve Manufacturers

A relief valve is a valve designed to provide protection from over-pressure in steam, gas, air and liquid lines. The valve "lets off steam" when safe pressures are exceeded, then closes again when pressure drops to a preset level.

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Showing 1-25 of 216 Manufacturers
Logo for Global Hose & Industrial Sales Co (SDVOSB) Global Hose & Industrial Sales Co (SDVOSB) (Nashville, TN)

Manufacturer, Contract Manufacturer, Distributor, Service Company

TOMCO low cost, preset, pressure relief valves are thoroughly engineered and precision manufactured to protect against equipment damage or personnel injury that may result from dangerous pressure build-ups. A time-saving, money-saving feature of TOMCO relief valves is that their threads are "pretaped" with teflon tape to assure leak-proof installation. The first 1 1/2 threads are teflon-free to eliminate potential for tape shredding into, and contaminating, the vessel interior.

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Product(s) by Global Hose & Industrial Sales Co (SDVOSB)
Logo for Check-All Valve Mfg. Co. Check-All Valve Mfg. Co. (West Des Moines, IA)


Logo for International Polymer Solutions Inc. International Polymer Solutions Inc. (Irvine, CA)

Manufacturer, Contract Manufacturer…

Our iPolymer Pressure Relief Valve (PRV) is constructed with a 100% pure PTFE Valve Body and Valve Plug. The single O-Ring design allows user selection of EP, Viton or Kalrez (FFKM eq.) depending on the flowing media. The iPolymer PRV is factory configured for a 10 psi to 90 psi pressure range. The relief valve is fully adjustable within this range by simply adjusting the upper Socket Hex Adjustment Screw and locking in place with the associated locking nut.

Crane Valve Group (Signal Hill, CA)
Apco-Valve & Primer (Schaumburg, IL)


NIBCO Inc (Elkhart, IN)


Red Valve Company Inc. (Carnegie, PA)


Watson McDaniel Company (Pottstown, PA)


Founded in 1878, Watson McDaniel Company is a U.S. manufacturer of steam traps, pressure pumps, pressure and temperature regulators, relief valves, liquid drainers, ejectors, engineered systems, and a variety of specialty products.

Circle Valve Technologies, Inc. (Harleysville, PA)


Circle Valve Technologies, Inc supplies a wide variety of relief valves in various sizes and operating pressures.

Armstrong International, Inc. (Three Rivers, MI)


Circle Seal Controls, Inc. (Corona, CA)


Quality counts at Circle Seal Controls — and it always has. Reliable products and responsive service that set industry standards are the cornerstones of our business. As a result, we welcome each new program as an opportunity to move these bench marks of excellence ever forward.

Rostra Vernatherm LLC (Bristol, CT)

Manufacturer, Contract Manufacturer

Rostra Vernatherm is a major manufacturer of thermostatic and pressure controls. We specialize in thermal actuators, pressure relief valves, oil valves, thermostatic valves, solar protection products, and custom controls. We are ISO 9001:2008 certified.

Standard Valve & Filter, Inc. (Horsham, PA)


Standard Valve and filter, Inc. is a stocking distributor of precision check valves, relief valves, regulators, solenoid valves, and filtration components for the industrial, power, marine, medical, chemical, petrochemical, oil, and gas processing markets.

Valv-Trol Co. (Stow, OH)


Valv-Trol manufactures high pressure and low pressure valves, including 2-way valves, 3-way valves, relief and check valves for use in water hydraulic systems and other applications.

Aquatrol, Inc (Elburn, IL)


Direct Manufacturer of ASME Safety and Relief Valves. NB (UV) ceritifed. Sizes 1/4" to 3".

Carr Lane Mfg. Co. (St. Louis, MO)


This pressure relief valve is used to protect hydraulic circuits from unexpected pressure increases. Applications include disconnected pallet fixtures, where the temperature of a closed system could increase and cause hydraulic pressure to exceed acceptable operating limits. Poppet-type valve, directly controlled.

Hoerbiger Service Middle (Dubai, United Arab Emirates)

Manufacturer, Contract Manufacturer, Distributor, Service Company

Kepner Products Company (Villa Park, IL)


Straval Machine Co., Inc. (Garfield, NJ)


A & B Stainless Valve Co (Califon, NJ)


Automatic Machine Products Co (Taunton, MA)

Contract Manufacturer

Barbee Valve & Supply Inc (Chula Vista, CA)


Bel Valve (Houston, TX)


C & D Valve Mfg Co (Oklahoma City, OK)


Continental Controls Corp (San Diego, CA)


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