Spring check valve
A spring check valve is similar to a lift check valve but is not as limited in both its functionality and placement options. With a lift check valve, the need for gravity is critical in its function and this requires it to be used in a vertical placement.
A spring check valve does not require either gravity or backflow to work.
The design of a spring check valve is based on the pressure of the media, mainly a liquid, that will cause the valve to open. The pressure that is required to open the valve is called the cracking pressure, this is the minimum upstream pressure when a normally closed valve begins to open and flow starts to run through the valve.
Fluid or gas runs in the correct direction and when it reaches the optimal pressure it will overcome the force of the spring and push the sealing surface of the plunger away from the seat. this allows flow to take place.
As a result of any pressure decrease, the spring will begin to push back against the flow and will return to its original position, sealing the valve and preventing reverse flow.
It is possible to design very precise spring pressures, due to this spring check valves can also be found with specific cracking pressures to meet a large variety of applications.
These industries also contain Spring Check Valves:
Oil and gas
Food and beverage
A more in-depth and technical look at the spring check valve:
Follow this link for more info on spring check valves:
We will be covering different types of valves in future blog posts.
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