Check Valves - One Way & Non Return Valves

Check valves (one way valves / non return valves) prevent backflow in pneumatic, water, and industrial systems.

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What is Check Valves?

Check valves (also known as one way valves, one way check valves, or non return valves) are automatic flow control devices that allow fluid to move in only one direction. When forward pressure is applied, the valve opens; when flow reverses, the valve closes to prevent backflow. This simple but critical function protects air compressors, pumps, and sensitive equipment from damage.

Types of Check Valves

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We offer a complete range of industrial check valves for pneumatic, water, and process applications:

● Swing check valve – Low pressure drop, ideal for horizontal or vertical pipelines (5,400 searches)

● Ball check valve – Compact design, reliable sealing (1,300 searches)

● Double check valve – Dual sealing for critical backflow prevention (1,600 searches)

● PVC check valve – Corrosion-resistant, ideal for chemical and pool applications (1,300 searches)

● Inline spring check valve – Fast response, perfect for air compressor check valve applications

Applications

Common applications for our check valves include:

● Protecting air compressors from reverse flow (air compressor check valve)

● Preventing backflow in sump pump and well pump discharge lines

● Maintaining system pressure in pneumatic circuits

● Isolation in pool and water treatment systems

● Brake booster systems in automotive (brake booster check valve)

All check valves are available with threaded, flanged, or push-in connections. Low MOQ, fast shipping.

What is a check valve symbol?

In piping and instrumentation diagrams (P&ID), the check valve symbol is typically represented by two triangles pointing in the flow direction with a line across, or a circle with an arrow. Understanding these symbols helps engineers and technicians correctly specify check valves in system designs.

For detailed check valve symbol charts and technical drawings, contact our team.

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