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What are the classifications of check valves

Author: admin / 2022-08-18

A check valve is a one-way valve.

Check valves are widely used and there are many types. There are three types of check valves commonly used in water supply and heat:

1. Spring type: The liquid moves from bottom to top, relying on the pressure to lift the valve disc controlled by the spring. After the pressure disappears, the spring force presses the valve disc down to seal the backflow of the liquid. Often used for small diameter check valves.

2. Gravity type: Similar to the spring type, it is closed by the self-gravity of the valve disc to prevent backflow.

3. Swing type: The liquid flows straight through the valve body, and the rotary valve flap on one side is opened by the pressure. After the pressure is lost, the valve flap returns to its position by its own weight, and the reverse liquid pressure closes the valve flap.

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