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SAE ARP 4285A-2018

Aerospace - Evaluation of Particulate Contamination in Hydraulic Fluid - Membrane Procedure

This SAE Aerospace Recommended Practice (ARP) establishes a method for evaluating the particulate matter extracted from the working fluid of a hydraulic system or component using a membrane. The amount of particulate matter deposited on the membrane due to filtering a given quantity of fluid is visually compared against a standard membrane in order to provide an indication of the cleanliness level of the fluid.

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Society of Automotive Engineers [sae]

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