What type of check valve is it that has a spring inside the valve body?
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There is a spring inside the valve body, and a seal is connected to this spring (normally the spring presses the seal against the valve body, keeping it in a closed state); when fluid pressure pushes the seal away, the check valve opens, and it closes again in the opposite direction. What kind of check valve is it?
Spring-loaded annular disc lift-type check valve: Compared with lift-type check valves of conventional design, this valve has a shorter disc travel distance; thanks to the effect of the spring load, it closes rapidly, which thus helps to reduce water hammer pressure, right? ?
Butterfly check valve, with the disc sealed by two semi-circular steel plates.
It might be the relief valve, right?
Based on the literal meaning of your description, it might be a spring-loaded annular disc lift-type check valve. Could the original poster please express themselves more clearly?
There are also many types of check valves that use springs. For information on check valves, visit http://www.enine.sh.cn/zhihuifa.html
It falls under the category of lift-type check valves, but there are also various types of lift-type check valves. Which specific one it is requires further explanation.
You can’t determine what type of check valve it is just by saying so! ! ! Typical check valves come with springs, like butterfly check valves!
10# hayuzhu: Those equipped with springs are usually lift-type check valves, split-type check butterfly valves, and swing-type check valves. The advantage of spring-based designs is their flexible installation options, allowing them to be installed at any angle. Additionally, lift-type check valves are sensitive to solid particles or crystals in the pipeline fluid, and are generally not used. Split-type check butterfly valves have poor adaptability to harsh operating conditions, and their lifespan is affected as a result.