Check Valves/

Brass Check Valve

Brass check valves are pipe fittings made of alloyed copper and zinc that are designed to regulate the flow of a process stream and protect against back pressure or backflow. While other metal and even plastic check valves may alternatively be used, brass is often chosen because of its ductile, thermal conductivity and corrosion resistant properties.

Check-All Valve Manufacturing Company
W. Des Moines, IA
515-224-2301
Check-All Valve manufactures check valves, stainless check valves, sanitary check valves, connector check valves and flange check valves. We specialize in precision-type check valves. We recognize that the customer is important, and we will continue to serve each customer to the highest standards. Let our specially trained staff help you choose the proper combination for your application needs.
Snap-tite offers over 70 years of experience in the manufacture quick disconnect couplings, check valves, hydraulic valves, vessels, fittings and other industrial components. Our strength is in providing expert solutions matched to the needs of the customer. From quick disconnects and relief valves to autoclaves, Snap-tite delivers the right high quality product, right on time, at the right price.
Delta Pacific Valve Mfg. Co.
Hauppauge, NY
631-231-1261
Delta Pacific Valve is a manufacturer of API cast steel gate, check, globe and ball valves. Our valves are manufactured to industry and international standards, or to our customers' specific requirements. DPV® valves comply with environmental standards and meet ISO 9000 standards. We are Delta Pacific, we are Delta Terrific! Call today!
Pneumadyne, Inc.
Plymouth, MN
763-559-0177
Pneumadyne, Inc. is an ISO 9001:2008 certified manufacturer of pneumatic components and pneumatic control systems. Our Check Valves feature a variety of port sizes including 1/16 tube id barbs, 10-32 and 1/8 NPT threads and ¼ push-in connections to fit plumbing requirements. Pilot Operated Check Valves are also available to reliably hold an actuator position in a variety of applications.
Plast-O-Matic Valves, Inc.
Cedar Grove, NJ
973-256-3000
Offering a full line of flow control products, Plast-O-Matic Valves ensures high quality by testing each of our valve products individually before shipment. We offer plastic check valves, PVC check valves, relief valves, ball check valves and more. We are committed to engineering excellence.
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Industry Information

Brass Check Valve

Though not necessarily as strong as other metals such as steel, brass is easily alloyed to include additional materials such as titanium and antimony to increase strength as well as corrosion resistance. This is essential to check valve function as the material construction must be compatible with the process stream composition, which may be basic, acidic, corrosive, abrasive or even hazardous. More mundane materials such as water and syrup may be forced through these non return valves as well. Finishing options such as hardening, cold working, nickel plating and lacquering also increase the usability of brass valves, which are now found in a number of industrial, commercial and even domestic plumbing applications where gases and fluids must maintain unidirectional and forward flow. Water and sewage treatment, agricultural, medical, chemical processing, food processing and petrochemical facilities are just a few that utilize brass check valves to prevent backflow that could otherwise cause serious damage to equipment and materials.

As brass refers to the material construct rather than a specific check valve, it can be incorporated into virtually every type of valve, including ball check valves, wafer check valves, lift check valves and swing check valves. Although the designs may vary considerably, the basic function of all brass check valves is fairly similar. The valve body, a cylindrical or spherical element, is installed in the pipeline. In the middle of this apparatus is what is known as the seat, a cross-sectional element that extends from the inner walls of the pipeline and has a central gap. An oversized stopper or plug rests in this seat, which sometimes incorporates an elastomeric seal for added protection against leaks. When fluid or gas flows in a forward direction and at a high enough pressure, the stopper is pushed away from the seat and the gap is opened to allow the stream through. As pressure drops, gravity or a spring mechanism push the stopper back into place, creating a tight seal that prevents backwash. Because check valve operation is entirely reliant on the pressure flows of a given process stream, no external activation or actuation mechanism is required. The valves are therefore easily installed into pre-existing pipelines, which also helps to determine the necessary valve size as it must correspond to the diameter of the pipe. Additional considerations include minimum and maximum pressure ratings, media temperature and the valve flow coefficient.