Check Valve Manufacturers

Check valves are one-way directional valves with fluid flowing in the proper direction opening the valve and reverse flow closing the valve. These mechanical valves have both gas and liquid applications. Learn more about check valves.

Search » Check Valves
Showing 1-25 of 317 Manufacturers
Logo for Asahi / America Asahi / America (Andover, MA)

Manufacturer, Distributor

www.asahi-america.com

Check valves are used to prevent the reversal of flow in a line. When open and under flow pressure, the checking mechanism will move freely in the media, offering very little resistance and minimal pressure drop.

Product(s) by Asahi / America
Logo for Global Hose & Industrial Sales Co (SDVOSB) Global Hose & Industrial Sales Co (SDVOSB) (Nashville, TN)

Manufacturer, Contract Manufacturer, Distributor, Service Company

www.global-hose.com/industrial-valves

CHECK VALVES: HIGH Pressure, Pneumatic, Brass, 1# Crack.

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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)

Manufacturer

www.checkall.com/

Check-All Valve manufactures in-line spring-loaded piston-type check valves to serve a wide range of industries. Our valves are offered with metal-to-metal or soft seats in sizes ranging from 1/8" NPT to 20" flanged connections. Spring cracking pressures range from 1/8-PSI to 75-PSI and virtually any setting in between. Pressure ratings are from full vacuum to 10,000 PSI with standard and exotic materials of construction also available.  We offer specially designed valves on a regular basis. Most options are available with fast delivery, shipping from their facility within one week.

Product(s) by Check-All Valve Mfg. Co.
Logo for DaPro Rubber, Inc. DaPro Rubber, Inc. (Tulsa, OK)

Manufacturer

www.daprorubber.com

Da/Pro Rubber, Inc. is a leading manufacturer of custom molded rubber, plastic, TPE non-metalic valves.  We custom mold non-metalic check valves to meet your specific requirements. Da/Pro offers custom compounding and design moldability assistance. Whatever you create, we have the capability, knowledge and experience to be your molding partner.

Product(s) by DaPro Rubber, Inc.
Logo for Dwyer Instruments, Inc. Dwyer Instruments, Inc. (Michigan City, IN)

Manufacturer

www.dwyer-inst.com

Dwyer Instruments is a leading manufacturer in the controls and instrumentation industry, and we continue to grow and serve major markets including, but not limited to HVAC, chemical, food, oil and gas, and pollution control.

Product(s) by Dwyer Instruments, Inc.
Logo for Stockton Valve Products, Inc. Stockton Valve Products, Inc. (Houston, TX)

Distributor

www.stocktonvalve.com

Stockton Valve Products distributes a full line of Check Valves, including Swing Check Valves, Wafer Check Valves, Duo Wafer Check Valves (also known as Double Door Wafer Check Valves) Inline Check Valves and more. Check Valves are available from 1/4″ through 24″ and larger in various material options. Check Valves are fluid control valves used to restrict flow to only one direction. An important concept in check valves is the cracking pressure which is the minimum upstream pressure at which the valve will operate. Body Materials include A105 Carbon Steel, WCB A216 Carbon Steel, LF2 Carbon, 304 Stainless Steel, 316 Stainless Steel, Monel M35-1 and more. Trim Materials include 304 SS, 316 SS, 410 SS, Hardfaced, Monel, Hasteloy C and more. End Connections include Threaded, Flanged, Socket Weld, Butt Weld, Ring Type Joint and more.

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

Manufacturer, Contract Manufacturer

www.ipolymer.com

Lumaco Sanitary Valves (Hackensack, NJ)

Manufacturer

www.lumaco.com/check.htm

Used to prevent back-flow of product in the line. Our spring-loaded check valves features a Teflon-guided disc & stem. The Smooth Mover! Our check valves are constructed entirely of 316 stainless steel for highest corrosion resistance. The disc of the check valves are fitted with a EPDM* "O" ring, making the valves leak proof and compatible with most products. No tools needed. A twist of the wingnut opens the standard heavy-duty clamp: the check valves are dismantled, ready for sterilization. Check valves are self-draining when installed vertically and meets all 3A standards. The teflon-guided stem, fitted with a light stainless steel spring, assures positive closure and easy action. Our check valves may be ordered with clamp-type or weld ends suitable for most installations.

Texan Supply (Baytown, TX)

Distributor

* SWING CHECK VALVES 800# STAINLESS STEEL * LIFT CHECK VALVES 800# STAINLESS STEEL * FLANGED CHECK VALVES RAISED FACE 150# STAINLESS STEEL * FLANGED CHECK VALVES RAISED FACE 300# STAINLESS STEEL * FLANGED CHECK VALVES RAIED FACE 600# STAINLESS STEEL

SEMCOR (St. Louis, MO)

Distributor

Our check valve supplier, Resistoflex, is well known in the check valve industry for leadership and innovation and provides us with the highest quality check valves at the best value available

ARI Valve Corp. (Marietta, GA)

Manufacturer

ARI check valves are in service all around the globe. Our check valves can be used in Industry, Powerstations, Flue gas purification plant, and processing technology. Our check valves can also be used in gas supply, vapor facilities, thermal oil applications, recycling facilities, vacuum facilities, ammonia, hot water, heating technology, district heating, cooling and freezing systems, general plant manufacturing, steam systems.

Crane Valve Group (Signal Hill, CA)

Check valves are used to stop backflow and protect rotating equipment or other mechanical devices from the sudden backflow surges that may occur. Crane offers a huge selection of checks, including dual-plate check valves, Nozzle-Type check valves, full body swing check valves, wafer style swing check, steam stop check valves, tilting disc check valves, ball check valves, foot (speciality) check valves, and CRANE? Forged Steel Check Valves

Apollo Valves (Matthews, NC)

Manufacturer

Apollo is a recognized leader in the check valve industry. Our bronze check valves include two-piece, in-line check valves and swing check valves. Apollo also carries stainless steel in-line check valves, plus cast iron swing and wafer check valves.

MAXPRO Technologies, Inc. (Fairview, PA)

Manufacturer

Pressures to 20,000 psi MAXIMATOR o-ring check valves provide high quality directional flow control and tight shutoff for liquids and gases. All check valves are supplied with glands and collars. These check valves are not to be used as a relief device. Pressures to 20,000 psi MAXIMATOR ball check valves prevent reverse flow where bubble tight shutoff is not mandatory. These check valves are designed with a ball cradled floating poppet to assure positive inline seating. This poppet design allows full flow around the ball to minimize pressure drop.

Apco-Valve & Primer (Schaumburg, IL)

Manufacturer

Apco, along with it's sister company, Hilton, produces a wide range of check valves. Check valve types include APCO Automatic Control Check Valves (CAC), APCO Double Door Check Valves (CDD), APCO Rubber Flapper Swing Check Valves (CRF), APCO Silent Check Valves (CSC), APCO Slanting Disc Check Valves (CSD), APCO Swing Check Valves (CVS), APCO Full Flow Foot Valves (FFF), APCO Full Flow Rubber Flapper Foot Valves (FRF), Hilton Vertical Check Valve (H-700), Hilton Vertical Vent Valve (H-750), Hilton Angle Disk Check Valve (H-900), Hilton Wafer Swing Check Valve (H-920), Hilton Tilting Disk Check Valve (H-940) and Hilton Swing Check Valve (H-950)

American Petrochem Valve (Houston, TX)

Distributor

American Production Valve is a leading provider of check valves—also known as clack valves, one-way valves, or non-return valves—for the oil, gas, and petrochemical industries. Appropriate for a wide range of petrochemical applications, we offer a variety of check valves, including Piston check valves (also referred to as lift check valves), Ball check valves and Stop check valves. We also offer check valves in the following styles: Clapper valves, Diaphragm check valves, Double ball check valves, Double check valves, Dual plate check valves and Swing check valves.

NIBCO Inc (Elkhart, IN)

Manufacturer

NIBCO has a complete line-up of check valves, including the NIBCO? Ring Check? check valves with self-closing disc, horizontal swing, sliding disc, silent check and Y pattern. Ask us how to spec the right check valves, or get catalogs, chemical resistance guides and submittals. You’re always guaranteed of superior quality, service expertise and the NIBCO warranty. NIBCO check valves: Solder, threaded, flanged, wafer, grooved end connections - End connections for Class 125, 150, 200, 250, 300 - Bronze, ductile iron, iron body, bronze mounted trim (IBBM), and corrosion resistant materials

Top Line Process Equipment Co (Bradford, PA)

Manufacturer

Top Line Process Equipment Company continues to be a leading supplier of quality hygienic stainless steel process equipment, including check valves, for 50 years. Offering from one of the leaders in the manufacturing of sanitary check valves, TOP-FLO's Ball Check Valves

Red Valve Company Inc. (Carnegie, PA)

Manufacturer

Watson McDaniel Company (Pottstown, PA)

Manufacturer

The Model WSSCV is an all stainless steel in-line check valve for steam, gas, or liquid service. It provides tight shut-off, minimizes water hammer and also stops recycling of pumps by preventing back flow of liquid. Used in the petrochemical, pulp & paper, textile and food & beverage industries. The WSSCV all stainless steel check valves will operate much longer and are less problematic than bronze or cast iron check valves. Body Material: 316 Stainless Steel.

Enginegear (Fort Lauderdale, FL)

Manufacturer, Distributor

Check valve 1/2" Pipe Size, Outside diameter 1.25", Overall length 1.75". All brass with stainless steel spring. It will crack open at 1/2 psi. Suitable for engine pre-luber applications.

HydraCheck (Salt Lake City, UT)

Manufacturer, Distributor

Check valves are mechanical valves that permit gases and liquids to flow in only one direction, preventing process flow from reversing. They are classified as one-way directional valves.

Circle Valve Technologies, Inc. (Harleysville, PA)

Distributor

Check valves from Circle Valve Technologies feature maximum operating pressures from 800-10,000 psig.

TSI Technologies (New York, NY)

Distributor

TSI Technologies works with its customers to deliver standard & customized, high quality components to meet HVAC needs in a timely and cost effective manner.

American Production Valve (Houston, TX)

Distributor

http://www.americanproductionvalve.com/check-valves.html

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Results 1 to 25 of 317


About Check Valves

A check valve is essentially a one-way or non-return valve, which allows a flow to pass in only one direction and blocks reverse flow. The valve usually operates automatically in reaction to the flow, without actuation from manual or other external sources. Forward flow opens the valve and reverse flow (or backflow) closes it. These valves are usually small and inexpensive, such as the check valves that are used in household items.

The nature and use of a check valve means that it has only one through-hole. Typically these valves are designed to respond to a a€?cracking pressure,a€? which is the minimum pressure necessary to unseat the valve and allow forward flow. If the pressure is less, the valve reseats to prevent backflow.

Types of Check Valves

A ball check valve uses a ball (often spring loaded) resting in a conical seat, which helps guide the ball back into the hole. If the valve is not spring loaded then reverse flow pushes the ball back into the closed position. These are typically used in liquid flow systems, since their seal is often not tight enough to stop gases. A double ball check valve is sometimes used to ensure there is no reverse flow. A ball check valve is not the same as a ball valve, which uses a ball-shaped rotor with an opening that is operated by an actuator.

A diaphragm check valve employs a rubber diaphragm in the closed position. When the pressure of the flow reaches a certain designed amount, the valve opens. When the pressure drops below this amount the diaphragm flexes back to its original closed position.

A swing check valve uses a butterfly valve-style disc that pivots on hinges or a trunnion. Forward pressure swings the hinge upwards, and reverse flow, or the weight of the disc itself, causes it to swing back down to close. The disc can be designed to either block reverse flow or allow forward flow. Large check valves are often swing check valves, although these valves come in many sizes.

A lift-check valve uses a disc or plug that lifts vertically off its seat when the pressure of the flow achieves a specified amount. When that pressure drops below the set amount, the disc falls back to its seat due to gravity or backflow pressure. The disc is held in the vertical line by means of a guide for proper reseating. A modification of this valve is called a piston-type lift check valve, which uses a piston-shaped plug with a dashpot to provide a damping effect during operation. This reduces damage caused by frequent operation in systems that experience frequent surges in pressure or changes in flow direction.

A wafer check valve is a lighter version of a lift or swing check valve that was developed to be less bulky and fit between a set of flanges. There are a variety of different designs.

Disc check valves employ a disc that moves in a plane at right angles to the flow, resisted by a spring held in place by a retainer. When the forward flow pressure is greater than the force exerted by the spring, the weight of the disc and any downstream pressure, the disc lifts off its seat, allowing flow. When the differential pressure drops below the set amount, the spring pushes the disc back onto its seat. A split disc check valve (also known as a dual plate check valve) uses a disc that is split and hinged down its center to overcome the size and pressure drop limitations of swing and disc wafer check valves. The two disc plates are limited to swinging in one direction and are held against the seat by a torsion spring.

A clapper valve is popular in firefighting and fire life safety system applications. It is widely used in dry pipe systems. It utilizes a hinged gate (that is often spring loaded) and opens only in the forward flow direction.

A stop-check valve is a check valve that also has external override control to stop flow regardless of the interior state of flow. When the valve is open, it acts as a check valve, but it can be deliberately shut at any time to stop flow.

A double check valve is often used as a backflow prevention device to keep potentially contaminated water from siphoning back into municipal water supply lines.

Check Valve Uses

Check valves are generally used to protect equipment that can be affected by reverse flow. Examples are flowmeters, strainers and control valves. Check valves can also eliminate pressure surges from hydraulic forces, such as waterhammer. Check valves in certain systems are used to prevent flooding, reverse flow on system shutdowns, and flow caused by gravity.

Check valves are also often used when multiple gases are mixed into a single gas stream. In these cases, a check valve is installed on each individual gas stream to prevent mixing of the gases in the originating lines before they reach the designed mixing line or area. This is especially important when dealing with flammable gases.

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