A hardness test stainless steel valve body, relief valve body hardness testing need to separate a after assembly, can be directly test pressure.

1, the hardness testing time: valve diameter less than 50 1 min, diameter less than 150 2 min, diameter greater than 150 time for 3 min.

2, can use liquid on sealing performance test, the pressure of 1. Under the condition of 2 times for testing.

test methods include: entrance pressure testing is completed, slowly debug the valve adjusting screw, let the entrance to the nominal pressure in the permission can work continuously, there can be no pause, blocking.

pressure reducing valve operation simulation test

2, butterfly valve body hardness test butterfly valve pressure testing process and the basic one to stop valve, stainless steel butterfly valves in the process of sealing surface test pipe should be tested by the water injection, a valve fully open, the other a butterfly valve should be completely closed, add pressure to the valve body to bear big value, check for leaks sealing surface, etc. , completely turn off the valve plate, on the other side of the Industrial Valves, check valve plate place whether leak-off is up to standard. If not zero leakage requirement, only used for debugging the flow, sealing surface don't need to do the test.

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