Adjust the volume of pneumatic valve leakage standard test < / div >

want to adjust the volume of pneumatic valve leakage detection is not standard, can be done through some test, after testing the conclusion also can come to the conclusion that adjust the standards of the pneumatic valve leakage.
1, regulating pneumatic valve leakage standard test, first of all need to test medium pressure, such as external regulation control pneumatic valve pressure should be 3. 5kg/cm² When regulating pneumatic valve to allow the differential value is less than 3. 5kg/cm² When this is the rules allow the differential values.
2, test medium shall be 10 - Clean fluid 50 ℃ ( Water or kerosene) And gas ( Air or nitrogen) , due to the different working conditions, other medium under test will have to produce error, so suggested that medium is recommended to complete the test, the test medium shall be in accordance with the relevant provisions to add the medium pneumatic valve, pneumatic valve can be connected through the atmosphere or export loss to the low voltage measuring device, going into the atmosphere when determining pneumatic valve after completely full of medium below connection pipe parts, this time can be measured to adjust the pneumatic valve leakage.
3, such as the type used to cut off the control of pneumatic valve to test, the test medium pressure are for maximum working pressure difference control pneumatic valve.
4, test, adjust the pneumatic valve actuator, the actuator signals should be combined with pressure, it is important to ensure that adjust the pneumatic valve is closed, when in the test, in view of the pneumatic actuators, pneumatic open and the handling of the closed type is different, the signal of gas open pressure must be zero state, models of gas closed type pressure shall be the input of the maximum signal pressure upper limit to the lower limit of the minimum pressure value.
5, testing, to cut off the control pneumatic valve actuator, signal pressure shall be the design rules of the actuator.
6, adjust the measuring precision of the pneumatic valve leakage and pressure should be less than + / - 10%.

the above is just the pneumatic valve small make up on how to adjust the volume of pneumatic valve leakage measure standard of some description, more detail please technical personnel also combined with the actual situation to test, do adjust the pneumatic valve we are authoritative.