ISO 16889:2022

Hydraulic fluid power — Filters — Multi-pass method for evaluating filtration performance of a filter element

This document describes the following:

—??? a multi-pass filtration performance test with continuous contaminant injection for hydraulic fluid power filter elements;

NOTE 1?? For the background interlaboratory study used to verify the test methodology, see Annex?D.

—??? a procedure for determining the contaminant capacity, particulate removal and differential pressure characteristics;

—??? a test currently applicable to hydraulic fluid power filter elements that exhibit an average filtration ratio greater than or equal to 75 for particle sizes =?25?μm(c), and a final reservoir gravimetric level of less than 200?mg/L;

NOTE 2?? It is necessary to determine by validation the range of flow rates and the lower particle size limit that can be used in test facilities.

—??? a test using ISO medium test dust (ISO MTD) contaminant and a test fluid in accordance with Annex?A.

This document is intended to provide a test procedure that yields reproducible test data for appraising the filtration performance of a hydraulic fluid power filter element without influence of electrostatic charge.

This document applies to three test conditions:

—??? test condition?1, with a base upstream gravimetric level of 3?mg/L;

—??? test condition?2, with a base upstream gravimetric level of 10?mg/L;

—??? test condition?3, with a base upstream gravimetric level of 15?mg/L.

Edition	2022
Published Date	2022
Published By	International Standardization Organisation
Page Count	43