BS ISO 6953-2:2015 pdf free
BS ISO 6953-2:2015 pdf free.Pneumatic fluid power一Compressed air pressure regulators and filter-regulators
Perform this test on three random samples if a single-rated pressure is proposed for the entire product or on six random samples if separate ratings are proposed for the inlet and outlet sections.If the product uses a diaphragm, modify or replace it to withstand the pressure applied (diaphragms are excluded from the test criteria, but not the diaphragm support plates or any piston). Other product sealing means can be modified to prevent leakage and allow structural failure to occur during the test, but modifications shall not increase the structural strength of the pressure-containing envelope. For relieving regulators, the relieving system shall be blocked.
Prepare the test samples as follows:
一If a single pressure rating is proposed for the entire product, remove the control spring and replace it with a solid spacer whose length maintains the poppet in its approximately half-open position.Close the gauge ports and the inlet port with plugs, and perform all testing by applying pressure to the outlet port. For relieving regulators, the relieving system shall be blocked.
一If a separate pressure rating is proposed for the inlet and outlet sections of the regulator, relieve the control spring force on three of the samples. Using a proposed pressure rating for the inlet, perform testing on the inlet port, allowing the poppet to be closed and keeping the outlet port open. Prepare the other three samples as described in previous indent and test them using a proposed pressure
rating for the outlet port.
The test should be done with a liquid which does not exceed ISO VG 32 (according to ISO 3448) or with compressed air Maintain the temperature given in When using a compressible medium, exercise safety precautions to contain an explosive failure.
The criterion for a failure is a fracture, separation of parts, or a crack, or that which can allow enough liquid to pass across the pressure-containing envelope to wet the outer surface. Leakage across the port threads shall not constitute a failure, unless caused by a fracture or a crack.
Where a unit or sub-assembly in the unit (for example, reservoir sight glass) is constructed of different materials, the higher appropriate factor should be used. The applied pressure can be restricted to the area of the interface between the different materials.BS ISO 6953-2 pdf free download.
