How the Spring Loaded Check Valve works

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Oct 20,2022

A Spring Loaded Check Valve is a device that only allows the flow of media in one direction. Therefore, they are often referred to as "one-way" or "check" valves. They are dual port valves, which means they have one inlet and one outlet. They do not require a user or actuator to function as they work automatically based on the pressure in the system. Spring Loaded Check Valve is mainly used to prevent contamination and prevent equipment damage that may be caused by the backflow of the medium.

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Since Spring Loaded Check Valve works without a user, it needs a pressure differential to work. In order for flow to pass through the valve from inlet to outlet, it requires a higher upstream pressure. The minimum difference between the inlet and outlet at which the valve operates is called the "bursting pressure" and it varies depending on the size and design of the valve. If there is higher pressure on the outlet side, the flow will try to move back through the check valve. Due to this "back pressure" it is designed to close afterwards.
Since the Spring Loaded Check Valve allows one-way flow, proper installation orientation is critical. Usually, there is an arrow that clearly describes the direction. If installed backwards, the medium will not flow through the valve in the intended direction of flow.

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