ISO 14085-5:2015 PDF

Scope: This part of ISO 14085 specifies a method for determining the resistance of a filter element to flow fatigue caused by varying flow through the filter in various stages of the filter contaminant loading process. The filter is subjected to a uniform varying flow rate for a specified number of cycles, at a number of predetermined differential pressures. Although the number of cycles and differential pressure conditions used in this part of ISO 14085 is meant to simulate possible service conditions, this part of ISO 14085 is not intended to qualify a filter element under replicate conditions of service; this can only be done by a specific test protocol developed for the purpose, including actual conditions of use, for example the operating fluid, contamination, and exact cyclic flow conditions. This part of ISO 14085 establishes a method for verifying the ability of a filter element to withstand the stress caused by cyclic differential pressures induced by a variable flow rate. The test data resulting from application of this part of ISO 14085 can be used to compare the performance of aerospace hydraulic filter elements.

ISO 14085-5:2015 Referenced Document

ISO 12103-1:1997 Road vehicles - Test dust for filter evaluation - Part 1: Arizona test dust
ISO 1219-1:2012 Fluid power systems and components - Graphical symbols and circuit diagrams - Part 1: Graphical symbols for conventional use and data-processing applications
ISO 14085-3:2015 Aerospace series - Hydraulic filter elements - Test methods - Part 3: Filtration efficiency and retention capacity
ISO 2942:2004 Hydraulic fluid power - Filter elements - Verification of fabrication integrity and determination of the first bubble point
ISO 2943:1998 Hydraulic fluid power - Filter elements - Verification of material compatibility with fluids
ISO 5598:2008 Fluid power systems and components - Vocabulary

2015 ISO 14085-5:2015 Aerospace series - Hydraulic filter elements - Test methods - Part 5: Resistance to flow fatigue