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Double Check Valve Manufacturers and Suppliers

IQS Directory provides a detailed list of double check valve manufacturers and suppliers. Find double check valve companies that can design, engineer, and manufacture double check valves to your specifications. Peruse our website to review and discover top double check valve manufacturers with roll over ads and complete product descriptions. Connect with the double check valve companies through our hassle-free and efficient request for quote form. You are provided company profiles, website links, locations, phone numbers, product videos, and product information. Read reviews and stay informed with product new articles. Whether you are looking for manufacturers of double door check valve tapped check valve double, spring loaded double check valves of every type, IQS is the premier source for you.

  • W. Des Moines, IA 515-224-2301

    Our double check valves are manufactured with the customer in mind. We believe in offering superior products and services every time. No matter whether you are looking for small or large valves, we can meet your every needs. It is our goal to offer excellent prices and service to each customer. Contact us to learn more today!

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  • Monroe, CT 800-533-3285

    We are a check valve manufacturer producing ball check valves, miniature check valves and stainless check valves. O'Keefe Controls will create a product for your special requirements and provide you with extensive engineering support. We offer a variety of precision orifices.

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  • Ft. Wayne, IN 260-482-4366

    Strataflo is a leading manufacturer of valves and fittings. For over 75 years we have been producing the quality parts you rely upon. Our valves and fittings are available in brass, stainless steel, carbon steel, titanium and other materials as well as in many different sizes. Whether its pipe fittings, check valves, quick connectors or manifolds you need, we have your solution.

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  • Somers, CT 860-749-0761

    Conval has been providing the industry with high quality, premium double check valve for nearly 50 years. We keep current with industry standards and strive to meet and exceed all of your expectations. If you have questions about any of our products or services give one of our representatives a call or visit our website for more information.

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  • Philadelphia, PA 888-386-8830

    Known worldwide for our O-Seal System of high pressure check valves, we are a manufacturer of precision engineered valves since 1915. Our leak proof reliability of our fluid-line relief valves is easily installed. We offer shutoff, needle, check and stop-check valves rated to 6,000 psi.

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  • Memphis, TN 866-300-0110

    Valves are an important part of many flow systems and pneumatic systems. That’s why at Davis Valve, we make only the highest quality ball valves and other components for our customers. We stock many other parts including gates, swing checks, plug valves, and more. We work our hardest to provide excellent customer service. Find out more when you contact us today! [keyword] in [city], [state], [country].

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  • Skokie, IL 800-532-5539

    It is our goal at the Keckley Company to meet all of our customers’ needs by offering superior check valves, a wide range of accessories, and sticking to old-fashioned customer service values. Keckley has experience serving industries such as bottling companies, airports, and steel mills. We believe that no matter what type of check valve that you purchase, you should get the highest quality. Find out more by contacting us today or visiting our website online!

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ARTICLES AND PRESS RELEASES

Pneumatic Solutions

The terms mixers, blenders and proportioners are synonymous when it comes to mixing two gases. Mixers are used in many applications across many industries; medical, welding, heat treating and food packaging to name a few. In the medical industry, O2 mixers are use to mix oxygen with other gases, including ambient air, for patient treatment. The mixers allow the doctor to go from a mixture of oxygen, typically from 21% to 100%. Most manufacturers are accomplishing this with modified needle valves that they manufacture. Easy Replacement Needle Valves Clippard... Read More

businessIndustry Information

Double Check Valves

A double check valve, sometimes called a double check assembly (DCA), is a type of check valve used to protect water supplies from contamination due to backflow. They are also commonly used in air brake systems on heavy trucks. Other places double check valves are found include lawn irrigation, fire sprinkler and combi-boiler systems.

Generally known as a relief valve, double check valves have fairly simple mechanics since their effectiveness is determined by the process flow, which means no other device is needed. They are usually attached to the pump head on the inlet and outlet lines of various types of fluid pipes in pumps and systems.  The body of the valve holds in place a ring-like element known as the seat, which extends from the inner walls toward the center-line of the pipe but does not fully close. A plugging mechanism, such as a piston or ball rests in the seat. Another plugging device is a swinging disk. When pressure is great enough and going in the desired direction, the stopper is lifted away from the seat, opening the gap to allow the process stream to flow freely. The reverse flow then pushes the plug back into the hole, creating an air tight seal that will not be opened again until forward flow pressure is greater than the back pressure. Since check valves allow the stream to flow in only one direction, the system stays clean. Specifically, double check valves consist of two spring check valves assembled in sequence, usually with a ball valve or gate valve at each end.


Double check valves have multiple valves working together for a few reasons. First, one check valve is still able to act even if the other is jammed open. Also, a more reliable seal is possible when one valve is closed, because this reduces the pressure differential across the other and stops leakage of any kind. Size varies among double check valves, as it does among all check valves. Small valves may be so compact they are not noticeable, particularly when they are integrated into the bodies of existing taps (faucets). Larger check valves may be installed with ball valves at the ends, which are partly there to test the double check valve periodically. This valve system mainly deals with keeping water clean and therefore requires consistent evaluation abilities for proper function. One industry utilizing double check valves is water treatment companies, but others use it often too.

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Double Check Valves Informational Video