ISO 4548-5-2020 pdf free.Methods of test for full-flow lubricating oil filters for internalcombustion engines — Test for hydraulic pulse durability.
1.Scope:This document specifies a method of testing the ability of full-flow lubricating oil filters manufacturedwith metal pressure vessel materials for internal combustion engines to withstand an internal pressuresurge. Normally surges occur when an engine is started from cold, and cyclic internal pressurevariations experienced during operation.
These tests are intended for application to spin-on type filters and detachable filters with disposableelements.
The tests can be applied to other filters，if thought applicable, by agreement between the filtermanufacturer and the purchaser.
NOTE This test is not intended to replace simulated environmental testing (e.g.at very low temperatures).lfsuch testing is required, it will be the subject of negotiation between the supplier and customer.
2.Normative references:The following documents are referred to in the text in such a way that some or all of their contentconstitutes requirements of this document. For dated references,only the edition cited applies.Forundated references, the latest edition of the referenced document(including any amendments) applies.ISO 1219-1, Fluid power systems and components —Graphical symbols and circuit diagrams — Part 1:Graphical symbols for conventional use and data-processing applications
ISO 4548-1, Methods of test for full-flow lubricating oil filters for internal combustion engines — Part 1:Differential pressure/flow characteristics
3.Terms, definitions and graphical symbols
3.1Terms and definitions For the purposes of this document, the terms and definitions given in IS0 4548-1 apply.
4 Operational characteristics to be tested:Filters are subjected in service to pressure fluctuations caused by either engine cold starting conditionsor hydraulic pulse events during normal operation.The test specified in Clause 8 can be performed at arange of pressures on separate filters to simulate in-service conditions and verify the capability of thefilter canister and seal to withstand these pressures.The measuring instruments shall be capable of measuring to the levels of accuracy given in Table 1.The last column in the table gives the limits within which the test conditions shall be maintained.ISO 4548 pdf download.