Common check valve

Check valve is check valve
The check valve is only used to prevent the flow medium from flowing back to the various types of pipelines or equipment.

Check valves are versatile and come in many types. The following are the check valves commonly used for water and heat:

1. Spring type: the liquid is from bottom to top, relying on the pressure to lift the valve controlled by the spring. After the pressure disappears, the spring force presses the valve flap to close the liquid backflow. Commonly used for check valves with small diameters.

2, gravity type: similar to the spring type, relying on the valve's own gravity to prevent backflow.

3, swing type: liquid in the valve body through, relying on the pressure to open the side of the rotating valve flap, after the pressure is lost, the valve flap returns to its own weight, the reverse liquid pressure closes the valve flap.

Other check valves ( check valves ), such as blowdown check valves , human-proof explosion-proof valves, and liquid-operated check valves are much the same.