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 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 Quick Disconnect & Valve Div.
Erie, PA
814-860-5700
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

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.