ISO 4548-9:2008 Preview
Methods of test for full-flow lubricating oil filters for internal combustion engines -- Part 9: Inlet and outlet anti-drain valve tests
This standard was last reviewed and confirmed in 2016. Therefore this version remains current.
ISO 4548-9:2007 specifies methods of measuring the effectiveness of either inlet or outlet anti-drain valves if fitted to a full-flow lubricating oil filter of the "spin-on" or "easy change" type, for internal combustion engines.
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