Flange End Swing Check Valve

Flange end swing check valve also called swing check valve, the connection of this check valve is flange end. And the color has red and blue to choose. Flange end swing check valve is one of check valves, and the function of flange end swing check valve also the same to check valve, both are to protect equipment downstream form backflow damage; to prevent contamination due to reverse flow; to prevent siphoning; to keep a vacuum seal,etc. 

FAQ:

Q: How a check valve work?

A check valve relies on a pressure differential to work. They require a higher pressure on the input side of the valve than the output side to open the valve. When the pressure is higher on the outlet side (or the input side pressure is not high enough), the valve will close. Depending on the valve type, the closure mechanism is different. Unlike other valves, they do not need a handle, lever, actuator, or human to correctly work.

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