I would like to ask: for pressurizing nitrogen valves, with a normal operating pressure of 6.5 MPA, what pressure is suitable for pressurization?
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I would like to ask regarding the pressure testing of nitrogen valves: the normal operating pressure is 6.5 MPa. What pressure should be used for internal leakage testing with air to consider it successful?
Use water for valve pressure testing; liquids are incompressible and make it easier to detect leaks. The operating pressure of the pressure testing valve body is 1.2 times the calibration pressure. The valve core is tested using the calibrated pressure of the valve; there is a national standard for valve pressure testing, and you can look it up on standard-related websites
Pressurize using a nitrogen cylinder or water pressure, to a level between 6.5 MPa and 7 MPa; if the pressure remains stable within three minutes, it is considered qualified. If it’s a valve factory, there are standard equipment. There is a standard process. The above suggestions apply only to factories
Generally, a pressure test at 1.5 times the pressure is required