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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.

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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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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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For an experienced designer and manufacturer of double check valves and relief valves, Coast Pneumatics is what you are looking for. Our valves can operate up to 10,000 PSI, and can be made from such materials as brass, aluminum, steel and stainless steel. Many standards and configurations available! Visit our website or call one of our representatives today for more information about our double check valves!
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DK-Lok USA is a leading manufacturer of valves and fittings. For over 20 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, DK-Lok USA has your solution.
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We believe in offering the best to our customers. Whether it is the best double check valves, customer service, attention to detail, or designs, we can help. We realize that both quality and price are important to you, which is why you won't find better prices or quality anywhere else. Give us a call today or visit us online to learn more!
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Industry 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.

Double Check Valves
Double Check Valves
Double Check Valves - Check-All Valve Manufacturing Company
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