L & J Technologies, Inc. - Hillside, IL
Manufacturer, Custom Manufacturer
Manufacturer of a variety of tank vents for open or closed systems. Options range from spring loaded, polyvinyl chloride & fiberglass reinforced plastic for use in a variety of pressure/vacuum venting applications.
Brand Names: Shand & Jurs
www.ljtechnologies.com/sj/sj.htm

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-...

Pressure or Vacuum Relief Valves Products
	Vacuum Relief Valves

Crispin-Multiplex Mfg. Co. - Berwick, PA
Manufacturer
Manufacturer of relief valves including pressure or vacuum valves. Valves are available in cast iron body, bronze & stainless steel trim with sizes ranging from 3 in. to 36 in. Features of valves include cracks open to admit air at 0.25 psig differential pressure, & resilient drip test seat.
www.crispinvalve.com/vacrrel.htm

The Protectoseal Co. - Bensenville, IL
Manufacturer, Custom Manufacturer
Manufacturer of pressure/vacuum breather vents available in a broad range of sizes & materials for both normal venting & emergency pressure relief. Other vapor & flame control products include: emergency relief vents, flame & detonation arresters, tank blanketing valves & specialty vents & valves in accordance with API, NFPA, UL, FM, OSHA, CE, ATEX.
www.protectoseal.com/vaporFlame/

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

OCECO, Inc. - Tiffin, OH
Manufacturer
Manufacturer of relief valves including pressure or vacuum valves & pressure control, reducing, regulating & relief valves. Pressure relief valves features corrosion resistance, full flow & can be adjusted to any setting. Pilot pressure relief valves maintain regular upstream pressure & positive shut-off on reduced downstream pressure. Pressure relief valves include stainless steel stem assembly, aluminum alloy pallet & seat. Sizes range from 2 in. to 8 in. Conservation regulator designed for liquid storage tanks & process vessels. Serves petroleum or chemical storage industries.
www.oceco.com/Products/Default.aspx

Pressure or Vacuum Relief Valves Products
	Emergency Relief Valve -V108A Pilot Press Relief Valve with Flame Trap Pilot Relief Valve -218 More

Circle Valve Technologies Inc. - Harleysville, PA
Distributor
Distributor of pressure or vacuum 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...

Pressure or Vacuum Relief Valves Products
	500 Series Relief Valves 0.5 to 150 psig HP500 Series Relief Valves 150 to 575 psig

Thorco Holdings, LLC - Locations
Distributor, Manufacturers' Rep, Service Company
Stocking distributor of tank vent valves including pressure, vacuum or pressure-vacuum relief valves. Materials include aluminum, carbon steel, stainless steel & non-metallic materials. Sizes range from 2 in. through 12 in. Emergency vents sizes from 16 in. through 20 in.
www.thorcousa.com/tank-vents.html

BDI - Locations
Distributor, Custom Manufacturer, Service Company
Distributor of a diverse line of valves made of brass, electroless nickel plated brass, stainless steel, plastic & other materials. Types of valves include: ball, check, foot, hydraulic, butterfly, relief, safety, solenoid, toggle, push button, needle, & plug.
www.bdi-usa.com/

The Specialty Mfg. Co. (SMC) - Saint Paul, MN
Manufacturer
ISO 9001:2008 certified manufacturer of unloading valves, pressure control, pressure reducing, pressure regulating & pressure relief valves in brass with Buna-N, Ethylene Propylene & Fluoroelastomer (Viton®) seal materials. Available sizes include 1/4 in., 1/8 in. & 3/8 in. male & female pipe thread (NPT) end configurations. Adjustable from 200 to 2000 psi. Applications include car wash, parts washer, pressure washer & flow control applications.
valves.specialtymfg.com/viewitems/pressure-...

Pressure or Vacuum Relief Valves Products
	667 RELIEF VALVE - 1/4" NPT 490 SERIES BALL CHECK VALVE - 1/4" to 3/8" NPT 410 SERIES PISTON CHECK VALVE - 1/4" NPT, 1/4" BSPP, 5/16" BARB More

Parker Hannifin Instrumentation Products Div. - Huntsville, AL
Manufacturer
ISO 9001:2008 certified manufacturer of relief valves including pressure or vacuum relief valves. Products feature pressure ratings of 6000 psig, inlet & outlet sizes of 6 mm, inlet & outlet connection of double ferrule compression type & range in set pressure from 350 psig to 6000 psig. Valves are available in stainless steel body material & trim, back-up ring material of PTFE & seal materials of rubber, ethylene propylene rubber, fluorinated fluorocarbon rubber, fluorocarbon polymer & neoprene.
www.parker.com/portal/site/PARKER/menuitem....

MSC Industrial Supply Co. - Melville, NY
Distributor, Custom Manufacturer
Large distributor of industrial products offering many types of relief valves. These include brass pressure relief valves with inlet sizes of either 1/2" or 3/4" & a maximum working pressure that is adjustable from 75 PSI to 150 PSI. Vacuum relief valves are available with a 1/2" inlet size & a working pressure of 15 PSI. Also provides high pressure safety, high capacity steam, diaphragm relief, thermoplastic relief & water heater relief valves.
www.mscdirect.com

Ryan Herco Flow Solutions - Locations
Distributor
Worldwide distributor of pressure or vacuum relief valves in operating pressures ranging from 7 PSI to 150 PSI. Pressure or vacuum relief valves are available in molded PVC, polypropylene & PVDF construction with EPDM or PTFE seals & diaphragms. Markets served include water, health, electronics, chemicals & waste. ISO 9000 compliant.
Brand Names: Chemplast, Dwyer, Hayward, Micromold, Plast-O-Matic, R-K, Saint-Gobain
webcat.rhfs.com/categorylist.aspx?catID=F32...

Liberty Industries, Inc. - East Berlin, CT
Distributor, Manufacturer, Custom Manufacturer, Service Company
Custom manufacturer & distributor of solenoid valves. Specifications o include 3 in. x 7 in. size, 20 V & 120 V voltage rating, 60 Hz frequency & 7 lbs weight. Solenoid valves are used to connect shoe cleaners to central vacuum. Typical applications & industries served include dealers, distributors, reps, contractors, precision manufacturing, pharmaceutical, hospital, optical/fiber optics, foreign, medical devices, laboratories, government, supplies/janitorial, universities, automotive, printed circuit/electronics, aerospace, semiconductor & plastics.
catalog.liberty-ind.com/item/shoe-brush-mac...

Pressure or Vacuum Relief Valves Products
	Pressure Relief Valve

Taco, Inc. - Cranston, RI
Manufacturer, Custom Manufacturer
ISO 9001:2008 certified custom manufacturer of electronic flow control ball valves. Specifications of control valves include 300 psi maximum operating pressure, 125 PSI shutoff pressure, 20 degrees F to 240 degrees F fluid temperature, 24 VAC current, 0.54 A power, 0.5 A heat anticipator setting, 1/2 in. to 1 in. size, 1.15 lbs. to 1.55 lbs. weight. Features of flow control valves include manual operation button with automatic reset, LED indicator light, plug-in terminals, blowout-proof stem & bi-directional flow.
www.taco-hvac.com/en/products/Hydronic%20Ac...

Emerson Process Management Regulator Technologies, Inc. - McKinney, TX
Manufacturer, Custom Manufacturer
ISO 9001:2000 certified manufacturer of valves including relief, pressure or vacuum 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...

Pressure or Vacuum Relief Valves Products
	H120 Series Relief Valves Type H200 Relief Valve Type H800 Relief Valve More

Compressed Air Systems, Inc. - Locations
Distributor, Service Company
Distributor of air compressors, vacuum pumps, dryers & filters, sandblasting & painting equipment, pneumatic tools.
Brand Names: AIMCO, AKG, Anderol, Binks, Chicago Pneumatic, Clemco, Del-Monox, Duro, Dwyer, General, Goodyear,...
catalog.compressedairsystems.com/category/a...

Pressure or Vacuum Relief Valves Products
	Aluminum Drum Gate Valves Stainless Steel Sliding Lock Ball Valves

G.W. Lisk Co., Inc. - Clifton Springs, NY
Manufacturer, Custom Manufacturer
Custom manufacturer of pressure or vacuum relief valves. Valves are available with 5 milliseconds to 15 milliseconds response time. Types also include pneumatic, hydraulic & exhaust gas recirculation (EGR) valves. Applications include heavy duty & diesel, military & aerospace & energy.
www.gwlisk.com/solenoid-valves.aspx

The Kraissl Co., Inc. - Hackensack, NJ
Manufacturer, Custom Manufacturer
Manufacturer of simplex duplex strainers, transfer valves & positive placement pumps for fuel oil transfer & pipeline service.
kraissl.rtrk.com/?scid=853669&rl_alt=http%2...

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...

Pressure or Vacuum Relief Valves Products
	V13W Series Bellows Valves V63 & V66 Relief Valves Series

General Air Products, Inc. - Exton, PA
Distributor, Manufacturer, Custom Manufacturer, Service Company
Manufacturer & distributor of standard & custom relief valves including pressure or vacuum relief valves. Vacuum & pressure relief valves range in sizes from 1/4 in. NPT to 1 in. NPT. Valves also include check valves, safety valves, relief valves, pilot valves, tank valves, throttle control valves, breather vent valves & cold start valves. Safety valves include ASME safety valves, ASME side outlet safety valves & non-coded safety valves. Check valves include cast brass check valves, unloading check valves & in-line check valves.
www.generalairproducts.com/Check-Valves-Saf...

Westfield Hydraulics Inc. - Pacoima, CA
Manufacturer, Custom Manufacturer
Manufacture, design, assembly & test of powered & non-powered valves, electromechanical devices & fluid power assemblies for aerospace & industrial use. Valves & actuators.
www.whi.cc

Rostra Vernatherm - Bristol, CT
Manufacturer
ISO 9001:2008 & AS9100 certified manufacturer of thermostatic actuators, controls & valves for the precise control of oil & water temperature in heating & cooling systems.
rostravernatherm.thomasnet.com/category/sel...

Pressure or Vacuum Relief Valves Products
	Pressure Relief Oil Valves Thermal Relief Valves More

AES Valves - Houston, TX
Manufacturer, Custom Manufacturer
Manufacturer of standard & custom valves used in pressure or vacuum relief applications. Types of valves include ball valves, gate valves, globe valves, swing valves, disc valves, bonnet valves, butterfly valves, check valves, plug valves & specialty valves. Available in sizes from 0.25 in. to 60 in. & in ANSI class 125 to 15,000 in stainless steel, carbon steel, iron, Hastelloy®, Incoloy®, Inconel®, Monel®, titanium & zirconium. Valves are available with 1 year warranty.
Brand Names: AES
industrialvalves.iesvalvesusa.com/item/all-...

Pressure or Vacuum Relief Valves Products
	Ball Valves

E-Motion, Inc. - Eugene, OR
Distributor, Manufacturer
Distributor of process pressure or vacuum safety relief valves. Items are available in stock.
Brand Names: Duravalve, Fabco-Air, Metalwork, STC, Truflo
www.e-motionllc.com/Articles.asp?ID=159