An Introduction to Check Valves from Plast-O-Matic Valves, Inc.

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Introduction to Check Valves
True Blue® PVC, CPVC, PVDF, PP & PTFE thermoplastic Check Valves help you stop unwanted reverse flow with an automatic bubble-tight seal.

• Series CKM & CK Diaphragm operated; self-sealing and normally-closed.
• Series CKS PFA encapsulated spring designs; self-sealing and normally-closed.
• Series CKD Compact design for low pressure applications; not self-sealing but has lower cracking pressure.

All True Blue Check Valves feature rugged thermoplastic construction with no wetted metal parts. As your assurance of quality, each valve is individually tested under pressure by a Plast-O-Matic inspector prior to shipment.

Diaphragm Check Valves are Superior to “ball checks”
The patented diaphragm in the Plast-O-Matic True Blue Check Valve is designed to re-seat with a bubble tight seal regardless of mounting position or reverse flow. Ball style check valves require two properties to seal properly: First, the ball check must be mounted with the flow direction pointed up, because gravity is required to pull the ball to the seat. Secondly, some reverse pressure and flow must be present, because pressure is required to seal the ball exactly on the seat.

If either of these conditions are not met, the ball check will leak! On the other hand, the Plast-O-Matic diaphragm check will seal in any position, whether or not flow is present.

Here’s a Simple Test: Take a Plast-O-Matic diaphragm check valve and place it flow arrow up on a paper towel. Pour a small amount of water into the outlet, lift up the valve, and you will see that it has remained absolutely sealed — no evidence of dampness on the paper towel. Now take any ball-style check valve and perform the exact same test — just be sure to have extra paper towels on hand!

Compare ball checks to our patented diaphragm check!

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Plast-O-Matic Valves, Inc.
When it comes to thermoplastic valves and controls, we are the problem solvers.
Founded in 1967, Plast-O-Matic Valves' ongoing mission is to provide unparalleled customer satisfaction while continually advancing the technology of liquid pressure and flow control. As the quality leader in the development of thermoplastic valves and controls for corrosive and ultra-pure liquids, POM provides a complete line of standard and custom designed solutions for difficult applications. The company is committed to product innovation, engineering excellence, precision manufacturing, 100% quality testing, and hands-on technical assistance. ISO 9001:2015 Registered.

Plast-O-Matic Valves, Inc.

Plast-O-Matic Valves, Inc.

Plast-O-Matic Valves, Inc.

An Introduction to Check Valves

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