Pneumatic brake valve pressure test regulations

the pneumatic brake valve, with the aid of compressed air driven pneumatic valve, pneumatic valve gate closed, sealing surface can only rely on medium pressure to seal, that depend on medium pressure, the disc will be to the other side of the pneumatic valve seat sealing surface pressure to ensure that the sealing surface of the seal. Before but in the use of pneumatic brake valve, pressure testing of product testing should follow certain rules.
pneumatic valve, pneumatic brake when unpacking the case should be a visual inspection, including pneumatic valve nameplate is complete, the product quality certificate, pneumatic brake valve closed, without flange surface and other damage, smudges, on both ends of a protective cover, etc.
and operators in the face of the pressure testing machine operation.
pneumatic valve, pneumatic brake pressure testing JHA, operators of pneumatic valve pressure testing, whilst in the process of safe hidden trouble should be familiar with and have corresponding preventive measures.
pneumatic valve, pneumatic brake pressure test process is: the pneumatic valve shell strength test, the sealing experiment, sealing test.
( Pneumatic brake valve shell strength test with water medium, pressure for the nominal pressure pneumatic valves. Times, the holding time min, no drip or damp as qualified.
( Pneumatic brake valve seal test medium is water, the pressure for the nominal pressure. DN for s or less times, the holding time, DN for s or less, or less DN ≧ for s, no leakage for qualified.
( Pneumatic brake valve seal test for low pressure sealing test, the test medium by air ( For the pneumatic valve, brake pressure. DN for s or less MPa, the holding time, DN for s or less, or less DN ≧ for s, osmotic quantity meets the requirements for qualified.
( After testing qualified immediately with dry compressed air to the pneumatic valve chamber in the inland waters.
( Pneumatic brake pressure testing qualified pneumatic valve in pneumatic valve body do logo), unqualified pneumatic valves do logo on x.
( Pneumatic brake valve after pressure testing should be stacked separately according to the device according to the specifications, single pile up non-conforming product; Every stack area should erect the obvious signs. Pneumatic valve after pressure test should cover to block, in stacking area with striped cloth cover protection.
( Pneumatic brake valve after pressure testing should be timely according to the device to fill in the pneumatic valve/pipe fittings test records, provided its type pneumatic valve pneumatic body on the purchase contract number.
( Test of the pneumatic brake valve issue need to fill in the pneumatic valve pneumatic valve issue record, issue and receive signed by both sides.
( Unqualified pneumatic valve should be separately set up the unqualified pneumatic valve information parameter