GB/T 8243.9-2006 Methods of test for full-flow lubricating oil filters for internal combustion engines. Part 9: inlet and outlet anti-drain valve tests (English Version)
This part of GB/T 8243 specifies the test method for the effectiveness of the inlet and outlet check valves of spin-on or "replaceable" full-flow oil filters for internal combustion engines.
GB/T 8243.9-2006 history
2012GB/T 8243.9-2012 Methods of test for full-flow lubricating oil filters for internal combustion engines.Part 9:Inlet and outlet anti-drain valve tests
2006GB/T 8243.9-2006 Methods of test for full-flow lubricating oil filters for internal combustion engines. Part 9: inlet and outlet anti-drain valve tests