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.

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Check-All Valve Manufacturing Company
W. Des Moines, IA
515-224-2301
Check-All Valve manufactures brass check valves, stainless check valves, sanitary check valves, connector check valves and flange check valves, in addition to much more. Check-All recognizes that the customer is important, and it will continue to serve each customer to the highest standards. Let Check-All's specially trained staff help you choose the proper combination for your application needs.
Parker/Snap-tite
Erie, PA
814-860-5700
Snap-tite joins the Parker family to create one of the world's strongest brands of Quick Connect Couplings. We produce hydraulic & pneumatic couplings in a variety of sizes, materials, and end configurations to accommodate a broad spectrum of design requirements. In addition to Quick Couplings, our product offering includes Hydraulic Swivels, Check Valves, & state-of-the-art Diagnostic Equipment.
Primary Fluid Systems Inc.
Burlington, ON
800-776-6580
As a leading manufacturer of quality brass check valves since 1991, see what Primary Fluid Systems has to offer in all related products and services, available in PVC, PP, CPVC, TFE, PVDF, 316 S/S, Hastelloy C and Alloy 20, plus ACCU-VENT automatic degassing valves. View and purchase products from Primary's online catalog and see complete CAD drawings from its downloadable library.
Pneumadyne, Inc.
Plymouth, MN
763-559-0177
Pneumadyne, Inc. is an ISO 9001:2008 certified manufacturer of pneumatic components & pneumatic control systems. Pneumadyne's brass check valves feature a variety of port sizes including 1/16 tube id barbs, 10-32 & 1/8 NPT threads and ¼ push-in connections to fit plumbing requirements. Pilot operated solutions are also available to reliably hold an actuator position in a variety of applications.

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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.