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.

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Logo for Crispin ValveCrispin Valve (Berwick, PA)
We manufacture check valves for both clean and waste water. Our product line includes: tilting disc, swing, globe, wafer, vacuum, negative pressure, surge, and foot.
Product(s) by Crispin Valve
Logo for Asahi / AmericaAsahi / America (Malden, MA)
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 Dwyer Instruments, Inc.Dwyer Instruments, Inc. (Michigan City, IN)
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 Check-All Valve Mfg. Co.Check-All Valve Mfg. Co. (W Des Moines, IA)
Check-All Valve Mfg Co. is a manufacturer of high quality in-line, silent, spring-loaded, piston-type check valves from 1/8" to 20" for over 40 years.
Product(s) by Check-All Valve Mfg. Co.
Logo for Defontaine of America - Definox ValvesDefontaine of America - Definox Valves (New Berlin, WI)
DEFINOX has specialized for more than 35 years in the design and manufacturing of stainless valves and equipment for the food processing, pharmaceutical and cosmetics industries. Our aim is develop a relationship of trust with each of our customers. Our valves and equipment are based on recommendations of international standards EHEDG, 3A , FDA.
 
Logo for DaPro Rubber, Inc.DaPro Rubber, Inc. (Tulsa, OK)
Da/Pro Rubber, Inc. is a leading manufacturer of custom molded rubber, plastic, TPE products. Whatever you create, we have the capability, knowledge and experience to be your molding partner.
 
Logo for Al xander Company, IncAl xander Company, Inc (Corry, PA)
Valves: Air and hydraulic, 2, 3 and 4 way, manual, solenoid, mechanically operated, flow control, check, needle, relief, directional control, diverter, flow divider, selector valves, lock valves, miniature logic, power and control valves, pneumatic system design
 
 TSI Technologies (New York, NY)
TSI Technologies works with its customers to deliver standard & customized, high quality components to meet HVAC needs in a timely and cost effective manner.
 
 Smart Products, Inc. (San Jose, CA)
Smart Products, Inc. designs and manufactures an extensive family of check valves for a wide range of applications including medical diagnostic and treatment equipment, gas analysis equipment, filtration, beverage dispensing and many others.
 
 Carten Controls, Inc. (Cheshire, CT)
Our stainless steel check valves are intended for process gas distribution service and bulk gas distribution service where containment, cleanliness and purity are of utmost importance.
 
 Kepner Products Company (Villa Park, IL)
Our Kep-O-Lok pilot operated valves combine the flexibility of Kepsel cartridge relief/check valves with carefully designed pilot sections.
 
 Valv-Trol Co. (Stow, OH)
Valv-Trol manufactures high pressure and low pressure 2-way, 3-way, check, and relief valves for use in water hydraulic systems and other applications.
 
 S&K Automation (Plymouth, MN)
http://www.sk-automation.com/ Swing check, piston check, inline check, spring check, condensate check, high temperature check. Leak free check valve for keeping prime on pumps and generator fuel applications. Corrosion resistant check for fuel dispensing equipment. Many check types in stock. Call 1-888-813-6331 Toll Free in USA or 763-476-1013.
 
 TOMCO Products, Inc. (Spartanburg, SC)
TOMCO provides the fluid power, instrumentation, automation, and chemical process industries with high quality couplings, slide valves, pressure relief valves, check valves, and accessories for over 30 years.
 
 Circle Seal Controls, Inc. (Corona, CA)
Circle Seal Controls designs and manufactures a variety of check valves for industrial instrumentation, OEM, and aerospace/military markets. For over fifty years, we have developed products that have set the standard in quality and performance. Our check valves cover operating pressures from 0 to 10,000 psig.
 
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