International Organization for Standardization (ISO)
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ISO 4548-2:1997
Scope
This part of ISO 4548 specifies tests for determining the element by-pass valve characteristics of full-flow lubricating oil filters for internal combustion engines.
Tests are specified with oils at two viscosities, one to assess the performance of an element by-pass valve with a cold oil and the other to assess its performance with an oil at a typical operating temperature.
ISO 4548-2:1997 history
1997ISO 4548-2:1997 Methods of test for full-flow lubricating oil filters for internal combustion engines - Part 2: Element by-pass valve characteristics
1990ISO 4548-2:1982/Cor 1:1990 Methods of test for full-flow lubricating oil filters for internal combustion engines; part 2: element by-pass component characteristics; technical corrigendum 1
1982ISO 4548-2:1982 Methods of test for full-flow lubricating oil filters for internal combustion engines; Part 2 : Element by-pass component characteristics