F.H. Gaskins Co., Inc. - Norfolk, VA
Distributor, Custom Manufacturer, Service Company
Distributor of safety, vacuum & pressure relief valves. Types include spring & pilot operated valves. Specifications of pressure relief valves include sizes ranging from 1/2 in. MPT to 12 in. flanged & pressures ranging from 1/2 psi to 8000 psi. Materials include bronze, brass, iron, steel, stainless steel & exotic alloys.
Brand Names: Consolidated
gaskins.thomasnet.com/category/pressure-rel...

Relief Valves Products
	Spring Operated Pressure Relief Valves Pilot Operated Pressure Relief Valves Quick Comparison Chart More

Premier Hydraulics Inc. - Farrell, PA
Custom Manufacturer
Custom manufacturer or relief valves. Types include regulating, shut off, cartridge and ecology valves. Custom manufacturing capabilities include milling, drilling, plating, brazing, welding, thread coating and screw machining.
www.premier-hydraulics.com/products.htm

The Lee Co. - Westbrook, CT
Manufacturer, Custom Manufacturer, Manufacturers' Rep
Manufacturer of fluid-control components for applications including hydraulic & pneumatic systems in commercial & military aircraft, spacecraft, missiles, naval vessels, machine tools, down-hole oil tools, power generation equipment & race cars. Pressure relief valve products available include high or low flow rate models featuring high capacity miniature inserts, cracking pressures from 20 to 5400 PSID, no elastomers & up to 5000 PSI operational pressure tolerances. Other valve products offered include check, shuttle & piloting solenoid types.
www.theleeco.com/VALVWEB2.NSF/Pressure%20Pr...

Gadren Machine Co. - Mount Ephraim, NJ
Manufacturer
Manufacturer of standard & custom vacuum pressure relief valves made from brass & 316 stainless steel for vacuum breakers & steam vessels. Vacuum relief valves are available in 1/4 in. to 3 in. sizes with 5 scfm to 150 scfm flow at 22 in./Hg. Stock items are also available. Meets MIL-I-45208A Spec.
catalog.gadrenmachine.com/viewitems/vacuum-...

Relief Valves Products
	Vacuum Relief Valves

CIRCOR Instrumentation Technologies - Hoke, Inc. - Spartanburg, SC
Manufacturer
ISO 9001:2008 certified manufacturer pressure or vacuum relief valves. Products include adjustable relief valves & right angle relief valves. Adjustable relief valves are available in 316 stainless steel & brass materials. Specifications include maximum operating pressures of 3000 psig, operating temperatures from -20 degrees F to 350 degrees F, 6.35 mm size orifices & 0.1 Cv flow factor. Right angle relief valves are available with operating pressures from 5 psig to 6000 psig. Meets RoHS & ASME requirements.
catalog.hoke.com/viewitems/fluid-control-co...

Relief Valves Products
	R6000 Series - Right Angle Relief Valve 6100 & 6200 Series - Ball and Poppet Check Valves

Plast-O-Matic Valves, Inc. - Cedar Grove, NJ
Manufacturer, Custom Manufacturer
Manufacturer of standard & custom relief, pressure, back pressure or vacuum valves in angle & in-line designs for corrosive chemicals, water & ultra-pure liquids. Available in sizes ranging from 1/2 in. to 2 in. Features include no wetted metals & stainless steel external fasteners. Materials include PVC, natural polypro, PTFE & Kynar® PVDF. Services include product innovation, engineering, precision manufacturing, pressure, flow & corrosion-resistant plastic piping, quality testing & technical assistance. RoHS compliant.
Brand Names: True Blue
www.plastomatic.com/relief-bypass-backpress...

Farris Valve Parts - Valley Stream, NY
Distributor, Service Company
Supplier of safety & relief valves. Relief valve products include those for air, steam & water in sizes from 1 by 2 inches to 20 by 24 in. with features such as operating pressures from 15 to 6000 PSI, temperature range of -450 degrees F to +1500 degrees F & steel body & bonnet with stainless steel trim. Other relief valve products include those with stainless steel or brass bodies, temperature ranges from -20 degrees F to +750 degrees F & -450 degrees F to +400 degrees F & effective orifice areas of 0.089 square in.
Brand Names: Deste, Everlasting Valve, Farris, Flowserve, K-MASTER, Kunkle, Lonergan, Spence, Teledyne Farris,...
www.boighill.com

Emerson Process Management Regulator Technologies, Inc. - McKinney, TX
Manufacturer, Custom Manufacturer
ISO 9001:2000 certified manufacturer of relief valves including hydraulic relief valves. Types include back pressure relief valves. Features include heat & chemical resistance, high response time, noise reduction option & chemically compatible elastomers. Specifications include maximum inlet pressure up to 450 psig, maximum differential pressure up to 400 psig, relief set pressure from 15 psig to 375 psig & temperature range from minus 18 degrees C to 149 degrees C. Markets served include chemical, oil & gas, refining, pulp, paper, power, food & beverage, life sciences, waste water management, LNG, pharmaceutical & consumer. Products are CE certified & meet ASME & ANSI specifications.
www2.emersonprocess.com/en-US/brands/fisher...

Relief Valves Products
	H120 Series Relief Valves Type H800 Relief Valve H120 Series Relief Valve More

M & M Control - Antioch, IL
Distributor, Manufacturer, Custom Manufacturer, Service Company
Distributor of various valve types for some of the industry's most prominent manufacturers. Products include pressure regulating & back pressure valves for steam, air/gas, liquid & cryogenic applications. These valves range in size from 1/8" to 2" for threaded NPT connections & up through 6 inches for flanged configurations. They also feature a wide selection of pressure reductions with initial inlets of 720 PSI & reductions from 1 to 400 PSI as well as temperature capacities between cryogenic up through 800º F. Other offered control valve types include diaphragm, temperature, back pressure, safety & relief valves.
Brand Names: Apollo, Aquatrol, Aquatrol, Armstrong, Ashcroft, Barber Coleman, Barber-Colman, CLA-VAL, Cash Acme,...
www.mmcontrol.com/valves.php

Kepner Products Co. - Villa Park, IL
Manufacturer, Custom Manufacturer
Custom manufacturer of relief valves including adjustable inline & cartridge relief valves made from stainless steel. Specifications of valves include 1/4 in. to 1/2 in. port size, minus 184 degrees C to plus 232 degrees C temperature, 50 psi to 2,000 psi crack pressure, flow rate up to 10 gpm & operating pressure up to 3,000 psi. Features include zero leak (bubble-tight) sealing, O-ring seals & poppet stop inside valve body.
Brand Names: Kepner
www.kepner.com/product.htm

Relief Valves Products
	Input Part Number If Known Relief Check Valves (crack 5-150 PSI) Relief Valves (relief 50-2000 PSI)

Generant - Butler, NJ
Distributor, Manufacturer, Custom Manufacturer
ISO 9001:2000 certified custom manufacturer of relief valves in various types including thermal, safety, high pressure, cryogenic, vent & liquid cylinder pressure relief valves. RoHs compliant.
Brand Names: Bi-Lok
generant.com/relief-valve.shtml

DK-LOK U.S.A. - Locations
Manufacturer
ISO 9001:2008 & ISO 14001:2004 certified. Manufacturer of relief valves made from 316 stainless steel. Specifications include pressure up to 6,000 psig, temperature up to 204 degrees C, 50 psig to 6,000 psig cracking pressure, 1/4 in. to 1/2 in. OD & 1/4 in. to 1/2 in. pipe thread size. Meets OHSMS 18001, ASME & API standards.
Brand Names: D-Pro
catalog.dklokusa.com/viewitems/relief-valve...

Relief Valves Products
	V63 & V66 Relief Valves Series

Parker / Autoclave Engineers FCD - Erie, PA
Manufacturer, Custom Manufacturer
ISO 9001:2000 certified custom manufacturer of metal & soft seat relief valves for pressure gas systems, cryogenic systems & petrochemical applications. Specifications of relief valves include 3/4 in. NPT outlet connection, 0.062 in. to 0.312 in. orifice dia., 1500 psi to 75000 psi setting pressure at 100 degrees F temperature & 500 psi maximum back pressure at 100 degrees F temperature. Valves are capable of handling air, gases, steam, vapor & liquids.
autoclave.thomasnet.com/category/relief-val...

Relief Valves Products
	RVP Metal Seat Relief Valves RVS Soft Seat Relief Valves

TR Engineering, Inc. - Scotts Valley, CA
Manufacturer
Manufacturer & designer of hydraulic safety relief valves made from steel & stainless steel. Valves are available with 3/8 in.-24 & 1/8 in. NPT thread sizes & 3,000 psi to 8,000 psi pressure. Relief valves are suitable for lifting systems or system using double acting hydraulic cylinders with large area ratio between the blind end & rod end. Made in the USA.
www.trengineering.com/hydraulic-relief-valv...

Singer Valve LLC - Surrey, BC
Manufacturer
Manufacturer of pressure and surge anticipating relief valves. Features include quick opening relief, adjustable pressure settings and adjustable closing speed. Suitable for higher pressure and to protect against power failure surges or pressure waves. FM and UL approved. Three year warranty.
www.singervalve.com/products/22

Pacific Industrial Service Co. - St Helens, OR
Distributor, Service Company
Distributor of pressure control, reducing, regulating & relief valves. Types include backpressure valves, flanged & threaded relief valves, vapor valves, pilot operated valves & high pressure valves. Serving a variety of industries such as pulp & paper mills, power generation plants, chemical plants, oil refineries, industrial processing plants, hi-tech industries, waste treatment plants, shipyards, food processors, utilities, pipelines/tank farms, HVAC steam services, hospitals, pipelines, marine & institutions.
Brand Names: Taylor
catalog.pacificindustrialservice.com/viewit...

Relief Valves Products
	Taylor Valve Series 8200/8300 Relief Valves (Flanged & Threaded) Taylor Valve 7800/7900 Relief Valves Taylor Valve 7700 Backpressure Valve More

Aquatrol/Marsh - Elburn, IL
Manufacturer
Manufacturer of ASME code safety & relief valves. Sizes ranging from 1/4 in. to 3 in. for steam, air, gas & liquid applications. Steam specialties division manufactures steam traps, radiator valves, FT traps & air vents. Features include adjustable tuned blow down, precision lapped metal to metal seating, stainless steel springs, rugged construction, closed seal hex cap or lever, inlet & outlet options.
www.aquatrol.com

Georg Fischer Piping Systems - Tustin, CA
Manufacturer
Six sigma capable ISO 9001 & ISO 14001 certified manufacturer & distributor of standard & custom pressure, back pressure, low pressure, pressure control, reducing, regulating & relief valves. Materials used include polypropylene & PVC. Pressure regulating valves range in pressure ratings from 7 psi to 150 psi & operating temperatures from -4 degrees F to plus 248 degrees F. Markets served include automotive, chemicals, confectionery, control & instrumentation, drugs & pharmaceuticals, electronics, food processing & mining.
Brand Names: PROGEF, Sygef
www.us.piping.georgefischer.com/go/C11C749F...

Relief Valves Products
	PVC PVC Beta PP

Aqua Environment Co., Inc. - Stinson Beach, CA
Manufacturer
Manufacturer of high pressure control, reducing, regulating & relief valves made from bronze, anodized aluminum & Viton®. Specifications of relief valves include 300 psi to 6,000 psi set pressures, 0.78 in. dia. equivalent orifices, 1/4 in. male NPT inlet, 7/8 in. hex & 2.1 in. lengths & minus 40 degrees F to 160 degrees F operating temperatures. Pressure control valves are available in zero seal hysteresis design. Valves are suitable for discharge & interstage reliefs on high pressure compressors, reliefs on charging lines, regulators & manifolds & hydraulic systems & accumulator reliefs.
valvesandregulators.aquaenvironment.com/cat...

Relief Valves Products
	504 Relief Valves 1527 Tank Mountable Compact Relief Valve 1607 Relief Valves More

Century Instrument Co. - Livonia, MI
Manufacturer
Manufacturer of automatic pressure relief valves. Diaphragm pressure relief valve is self-contained, spring loaded & requires no air pressure or outside power source to function. Capabilities include relief at a preset pressure & reseating automatically when a safe working pressure is restored. Valves are available in a variety of body materials, linings & diaphragms & with pressure relief stetting from 10 to 150 psig. Applications include protecting piping systems of plastic or glass against over-pressure, pipe line surges & water hammer.
www.centuryinstrument.com/830.html

Relief Valves Products
	Model 830-RV Diaphragm Relief Valves

Parker/Snap-tite - Union City, PA
Manufacturer
Directional control valves to 10,000 psi, manual & solenoid operated, as well as flow control, relief & check valves.
www.snap-titequickdisconnects.com/products/...

Lonergan Valve Services - Deer Park, NY
Distributor
Distributor of valves including safety relief valves. Valves in standard & bellow designs are available. Features include trim, bonnet & spring. Safety relief valves have pressure ratings from 0 psig to 6000 psig & temperature ratings from -20 degrees F to 800 degrees F. Safety relief valves are available in different sizes in carbon steel, iron, bronze & stainless steel body materials. Meet ASME standards.
Brand Names: Lonergan
www.authorizedparts.com/find?number=&manufa...

Valve Check, Inc. - Maplewood, MN
Manufacturer, Custom Manufacturer, Service Company
Designer & manufacturer of self cleaning, quick opening, & positive sealing check & relief valve products. Relief valve products offered include those made of aluminum, brass, steel & stainless steel. Seal compounds available for relief valve products include Viton®, neoprene, Buna, PTFE, silicone, fluoro-silicone, ethylene, propylene & Kalrez®. Factory set pressure tolerances are from 0.05 to 900 PSI with atmospheric or in line venting. Male & female NPT & other threaded ends are offered in 1/8 to 2 in. Mufflers & safety caps are also available
www.valvecheckinc.com

Associated Steam Specialty Co. - Locations
Distributor, Manufacturers' Rep
Manufacturers rep. & distributor of safety relief valves. Types of valves also include trap valves, steam & water mixing valves, automatic balancing valves, manual balancing valves, solenoid valves, pneumatic valves, check valves, pressure reducing valves, temperature regulating valves, control valves, piston valves, radiator valves & test valves.
Brand Names: Kunkle
www.associatedsteam.com/line.htm

Circle Valve Technologies Inc. - Harleysville, PA
Distributor
Distributor of relief valves. Zero leak, positive resealing, wide range of cracking pressures, high flow capacity, aluminum, stainless steel, brass, steel, male/female pipe & tube connections. Seal materials include Buna N, Neoprene, Viton, EPR & PTFE. Market served include industrial gas, chemical, medical, power, marine & oil & gas processing.
Brand Names: 3B Filters, Aerodyne, Atkomatic, Circle Seal Controls, Contromatics, Duravalve, Go, Gyrolok,...
catalog.circlevalve.com/category/relief-val...

Relief Valves Products
	R6000 Series Right Angle Relief Valves 500 Series Relief Valves 0.5 to 150 psig HP500 Series Relief Valves 150 to 575 psig More