There may be several reasons why the check valve is not closed properly:
OneBearing wear:
If the bearing of the check valve is severely worn, the disc or valve cannot be completely closed, which will affect the sealing performance of the check valve.
IISediment clogging:
If there is sediment, impurities and other substances inside the check valve, it will cause the valve to fail to close properly and may cause jamming.
IIISpring failure:
If the spring in the check valve fails, the disc will not be able to snap back and close, making it impossible to close completely.
FourthImproper design or installation:
If there is a problem with the design or installation of the check valve, such as the valve is not the right size, the sealing surface is uneven, etc., it will affect the closing performance of the valve.
FiveWorking media issues:
Some media, such as liquids containing particulate matter, highly viscous liquids, etc., can cause the check valve disc or valve to jam, which can affect the closure.
Therefore, inspecting and maintaining the bearings of the check valve, removing deposits, checking that the springs are in good condition, ensuring that the design and installation are correct, and selecting the appropriate valve material can help solve the problem of the check valve not closing properly.
Detersen check valve