ISO-3968 › Historical Revision Information
Hydraulic fluid power - Filters - Evaluation of differential pressure versus flow
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ISO 3668:2017 specifies a procedure for evaluating differential pressure versus flow characteristics of hydraulic filters and constitutes a basis for agreement between the filter manufacturer and user.
It also specifies a method for measurement of the differential pressure generated at different flow rates and viscosities by the relevant parts of a filter assembly, spin-on and any valves contained within the filter which are in the flow stream. The typical types of filter to be tested are as follows:
Type 1: which are spin-on filters in which the replaceable unit does not include a filter head (it might or might not include the element by-pass valve);
Type 2: which are spin-on filters in which the replaceable element is tested together with a filter head (it might or might not include the element by-pass valve);
Type 3: which are filter assembly, usually of the replacement element type, that is the housing (head and bowl) and element.
To find similar documents by classification:
23.100.60 (Filters, seals and contamination of fluids Hydraulic fluids, see 75.120)
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Document Number
ISO 3968:2017
Revision Level
3RD EDITION
Status
Current
Publication Date
July 1, 2017
Committee Number
ISO/TC 131/SC 6