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Pressure valve test method
The pressure valve test method shared with you today is mainly divided into the following five points to introduce:
(1) Pressure regulation range and pressure stability test. Adjust the adjustment handwheel of the valve under test, from fully open to fully closed, and then fully open, and see the pressure rise and fall as well as the pressure regulation range from the pressure gauge. The pointer of the pressure gauge should rise and fall smoothly, and the pressure regulating range should meet the specified pressure regulating range. When the pressure is higher, the pressure pulsation value should not exceed the specified value.
(2) Test of internal leakage. Adjust the adjustment handwheel of the valve to be fully closed, adjust the overflow safety valve to the higher pressure of the valve under test, and then adjust the adjustment handwheel of the valve under test to measure the internal leakage at the overflow port of the valve under test.
(3) Unloading pressure test. Connect the remote control port of the relief valve to the oil tank, make the tested valve pass the test flow, measure the pressure of the oil inlet and outlet of the relief valve, and the difference is the unloading pressure of the tested valve.
(4) Pressure loss test. Adjust the adjustment handwheel of the valve under test to be completely loosened, and make the valve under test pass the inspection flow. The pressure of the inlet and outlet of the relief valve is measured by the pressure gauge, and the difference is the pressure loss of the valve under test.
(5) Open and close characteristic test. Close the overflow safety valve, adjust the valve under test to a higher pressure, adjust the overflow safety valve to gradually reduce the pressure of the system, and measure the overflow flow of the valve under test when it drops to the closing pressure of the valve under test. Adjust the overflow safety valve, start from the valve under test does not overflow, and gradually increase the pressure of the system. When the opening pressure of the valve under test rises, measure the overflow amount of the valve under test.
The above is the pressure valve test method shared with you today, I hope it will be helpful to you, please forward it~
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