Seeking guidance on valve pressure testing standards
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The required leakage classification in the data sheet is level VI, with the standard being ANSI/FCI. My question is: if pressure testing is carried out, should only the valve seat leakage test be conducted according to the ANSI standard? What standards should be followed for manufacturing the casing?
Talk about the actual operations of valve pressure testing. First, it is necessary to apply pressure at the valve port while the valve is closed ； Secondly, the pressure testing after plugging the valve outlet is mainly used to test the dynamic seal between the valve stem and the valve body. It is also possible to conduct a pressure test using a water pressure of 1.5 times the nominal pressure of the valve specified. It is recommended that for some valves with oil-free requirements, they must be disassembled for inspection and subjected to degreasing treatment. For reference.