Check Valves/

PVC Check Valve

PVC check valves are unidirectional flow regulators made of a particularly versatile thermoplastic resin and easily suited to the specific needs of industrial, commercial and even domestic check valve applications. An acronym for polyvinyl chloride, PVC is a highly diverse polymer that can be formulated to suit a number of check valve applications. As check valves handle corrosive, acidic, basic and abrasive materials, among others, it is important to have valves that are chemically and physically compatible with the process streams they encounter.

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Check-All Valve Manufacturing Company
W. Des Moines, IA
515-224-2301
Check-All has become an internationally recognized company for quality, innovation, and cost efficiency. Check-All recognizes that the customer is #1 and will continue to build its foundation for success on SERVICE TO EACH CUSTOMER. Along with its many standard / space saving designs, Check-All can design and manufacture its pvc check valves for almost any application.
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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.
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Primary Fluid Systems Inc.
Burlington, ON
800-776-6580
Primary Fluid Systems recognizes the need for specialty components not readily available or price competitive on the market to help make equipment more efficient. For more than twenty years Primary has been manufacturing high-quality pvc check valves designed to enhance the accuracy and safety of customers' technology. Please visit Primary`s website for full descriptions of superior services.
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Pneumadyne, Inc.
Plymouth, MN
763-559-0177
Pneumadyne, Inc, an ISO 9001:2008 certified manufacturer of pneumatic components, was founded in 1975. Over the years, Pneumadyne has grown from a manufacturer of precision detailed components to a designer and manufacturer of entire system solutions. Providing high-quality pvc check valves that solve problems and exceed customer expectations continues to be Pneumadyne's goal.
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Industry Information

PVC Check Valve


One of the most popular examples of plastic check valves, PVC apparatus are nontoxic and provide smooth flexible valve components. PVC is actually used as the seat of many metal valves, such as the brass check valve, as it compresses to form a tighter seal against backflow, the prevention of which is the main goal of all non return valves. The design varies among the many types of check valves available for different applications, but the basic concept behind them remains similar. Fluid or gas flowing in the proper forward direction creates enough pressure to open the valve by slightly displacing a piston, ball or disc. This stopper mechanism can only open in one direction. Reverse flow inversely 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. Because the operation is entirely reliant on the pressure flows of a process stream, they require no external activation or actuation, making installation easy in pre-existing pipes or cisterns.

While metals are often used in check valve design, PVC is just as common, as it is easily fabricated into precise shapes and offers many of the same qualities as metals with lower overhead cost. Because production of polyvinyl chloride requires much less petroleum than most other plastics, it is one of the most popular materials for valve construction. Most components made of this versatile polymer are produced through the suspension polymerization of water and vinyl chloride monomers. Stabilizers, lubricants and plasticizers may also be added to the mix to ensure the proper valve features for a given application. Combining the resins with additives allow for the production of plastic that is rigid or flexible, opaque or transparent and insulating or conductive. After processing, valve components are produced through extrusion, injection molding, stamping and in some instances die casting. Considerations for specific PVC composites include dimensions, pressure ratings and thermal capabilities, all of which may vary significantly depending upon the specific additives included in polymerization. The main weakness of PVC is its aversion to UV light. Check valves made of this material should not be used in outdoor applications without consideration for this. Check valve failure could lead to damaged equipment, product contamination, pressure surges and even flooding. As an acetal polymer product, PVC check valves offer high fatigue resistance and lubricity which help to improve product longevity.