BS ISO 4548-5:2020 pdf free.Methods of test for full-flow lubricating oil filters for internal combustion engines Test for cold start simulation and hydraulic pulse durability.
BS ISO 4548-5 Filters are subjected in service to pressure fluctuations caused by either engine cold starting conditions or hydraulic pulse events during normal operation. The test specified in Clause 8 can be performed at a range of pressures on separate filters to simulate in-service conditions and verify the capability of the filter canister and seal to withstand these pressures. Fit a filter on an appropriate adaptor and install the test filter to the filter manufacturer’s recommended tightening torque or angle of rotation for the filter to be tested. When multiple samples are to be tested for getting the statistically meaningful data, the mean and standard deviation should be calculated and reported. Additionall, the B10 value by Weibull analysis can be calculated and reported
when tested with more than seven samples. NOTE Weibull analysis (see Annex B) and the B10 value are described in ISO 19973-1.
Connect the test adaptor to the pipework system of the test rig.NOTE Figure 1 has been shown to produce an acceptable waveform. Other hydraulic configurations will work as well.Adjust the charge in the accumulator (item 6) to approximately 50 % of the maximum test pressure agreed with the customer. In the absence of such an agreement, one of the values given in Annex A may
be used. Set the system pressure relief valve (item 4) to at least 110 % of the test pressure. Open the inlet pressure valve (item 11) to reduce test pressure to minimum. Start the pump (item 2). Allow the rig to run until all air has been purged from the system. Bleed the filter to be tested (item 3) by opening the bleed valve (item 14). The directional control valves (item 5) shall be open to pass oil through the filter and bleed air out of the system. The adjust valve (item 12) should be open 10 % to 20 % to allow pressure adjustment during the test. Open the flow restrict valve (item 9) approximately 50 %. Close the bleed valve (item 14). Adjust the iniet pressure valve (item 11) to the specified pressure. Precision modulation of pressure can be attained by using the adjust valve (item 12). Start the test.BS ISO 4548-5 pdf download.