ISO 16889:2022 pdf download – Hydraulic fluid power — Filters — Multi-pass method for evaluating filtration performance of a filter element.
1 Scope 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. 2 Normative references The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated 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 2942, Hydraulic fluid power — Filter elements — Verification of fabrication integrity and determination of the first bubble point ISO 3722, Hydraulic fluid power — Fluid sample containers — Qualifying and controlling cleaning methods ISO 3968, Hydraulic fluid power — Filters — Evaluation of differential pressure versus flow ISO 4021, Hydraulic fluid power — Particulate contamination analysis — Extraction of fluid samples from lines of an operating system
6.6 Petroleum-based test fluid, in accordance with Annex A. NOTE 1 The use of this carefully controlled hydraulic fluid assures greater reproducibility of results and is based upon current practices, other accepted filter standards and its worldwide availability. NOTE 2 The use of an anti-static agent can affect the test results. 6.7 Filter performance test circuit, composed of a filter test system and a contaminant injection system. 6.7.1 Filter test system, consisting of the following: a) a reservoir, a pump, fluid-conditioning apparatus and instrumentation that are capable of accommodating the range of flow rates, pressures and volumes required by the procedure and capable of meeting the validation requirements of Clause 8; b) a clean-up filter capable of providing an initial system contamination level as specified in Table 3; c) a configuration that is insensitive to the intended operative contaminant level; d) a configuration that does not alter the test contaminant distribution over the anticipated test duration; e) pressure taps in accordance with ISO 3968; f) fluid sampling sections upstream and downstream of the test filter in accordance with ISO 4021. NOTE For typical configurations that have proved satisfactory, refer to Annex B.
ISO 16889:2022 pdf download – Hydraulic fluid power — Filters — Multi-pass method for evaluating filtration performance of a filter element
