Leading Plastic Check Valve Manufacturers

A plastic check valve, like all check valves, prevents backflow by allowing process streams such as water, corrosives, compressed air, liquid metal, hydraulic fluid, fuel, gasoline, syrup, acids, adhesives, slurry and sludge, to name a few, to flow freely in a downstream direction while simultaneously sealing itself should the direction of flow reverse. Read More…

Plastic Check Valves Plastic check valves are unidirectional flow control devices made out of organic, synthetic or processed polymers. The purpose of these mechanisms, like all check valves, is to eliminate the potential damage that could be caused by backflow if left unchecked. Back pressure or reverse flow can result in mechanical failure, product contamination, pressure surges and flooding.

Our 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!

Check-All Valve Manufacturing Company $$$

Our team at Control Devices believes that all of our customers should receive products that exceed their expecations. That’s why we design and produce our check valves using the highest quality materials. We will work with each customer to help find a lasting solution. Our company is ISO 9001:2015 certified. Contact Control Devices today to learn more!

Control Devices $$$

We make our check valves to be wear resistant and able to withstand the elements in sewage, sludge and slurries plus hold up to pressure drop. Rubber and full-metal-body check valves are offered. Contact us about your process piping needs. EVR Products is an ISO 9001:2015-registered company.

EVR Products $$$

Manufacturing standard or custom check valves, pressure relief valves, needle valves, control valves, pressure regulators and instrument-quality tube fittings plus other flow and pressure control products is our business. Generant is ISO 9001:2000 certified. We have been in business for 75+ years.

Generant $$$
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Plastic check valves provide this security with relatively simple devices. The body of the valve is a molded, extruded or die cast cylindrical element that is placed midstream in the plumbing. Because they require no external activation or actuation mechanism, these non return valves are easily installed into pre-existing pipeline configurations. The body holds in place a ring-like plastic element known as the seat. This 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 of the valve opening the gap to allow process stream to flow freely downstream. 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.

As aforementioned, plastic check valves come into frequent contact with a number of different process streams. In order to provide reliable stream control, it is important to select a valve material that is chemically compatible with the flow composition. A number of different plastics are therefore available to suit check valve needs under any circumstances.

PVC check valves are common as they provide good flexibility, smooth surfaces and are nontoxic. Polypropylene is also used and is similar to PVC but with additional benefits of resistance to UV, weathering and ozone exposure. PTFE is suited for use with highly corrosive substances while CPVC maintains integrity in high heat applications such as boiling water or molten metal transfer. Each of these acetal polymers offers high fatigue resistance and lubricity which help to increase product longevity.

While metals may also be used in valve design, plastics are easily fabricated into precise shapes and offer many of the same qualities as metals with lower overhead cost. In addition to material considerations, manufacturers should consider plastic check valve dimensions, pressure ratings, thermal capabilities, connection types and curing technology, all of which can have a significant impact on the plastic check valve performance.

Plastic Check Valves Informational Video

 

Check Valves Power Pages

Check Valves

Check Valves

A check valve is a safety device designed to allow fluids and gases to flow in one direction. Under pressure, fluids enter the valve at the inlet and exit through the outlet. Uninterrupted flow continues until the pressure drops, or the pump is shut down...

Spring vs. Swing Check Valves

Spring vs. Swing Check Valves

A spring check valve is a valve that ensures unidirectional flow and prevents reverse flow. They have a single inlet and outlet and must be placed in proper orientation to function correctly. On the side of a spring check valve, and all...

Ball Valves

Ball Valves

A ball valve is a shut-off valve that allows or obstructs the flow of liquids and gases in a piping system by rotating the ball having a bore inside the valve for 90°. The ball is mounted against two seats and has a stem that connects it to the operating and control mechanism that rotates the ball...

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Diaphragm Valves

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Diaphragm valves utilize a flexible diaphragm to obstruct, control, or isolate the flow of fluids. The diaphragm acts as the flow control element that flexes up or down to increase or decrease the fluid flow rate, respectively...

PVC Ball Valves

PVC Ball Valves

A PVC or polyvinyl chloride ball valve is a plastic on and off valve that has a rotary ball with a bore where turning the ball a quarter turn can stop the flow of a fluid. They are highly durable, cost effective and can be...

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