ISO INTERNATIONAL STANDARD 16889 Third edition 2022-01 Hydraulic fluid power - Filters Multi-pass method for evaluating filtration performance of a filter element Transmissionshydrauliques-Filtres-Evaluation des performances parla méthode defiltration en circuit ferme Referencenumber IS016889:2022(E) ISO @ ISO 2022 IS0 16889:2022(E) COPYRIGHTPROTECTEDDOCUMENT @ISO2022 All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may be reproduced or utilized otherwise in anyform or by any means, electronic or mechanical, including photocopying,or posting on the internet or an intranet, without prior written permission. Permission can be requested from either IO at the address below or Iso's member body in the country of the requester. ISO copyright office CP 401 : Ch.de Blandonnet 8 CH-1214 Vernier, Geneva Phone: +41 22 749 01 11 Email: [email protected] Website: www.iso.org Published in Switzerland ii IS02022-Allrightsreserved IS0 16889:2022(E) Contents Page Foreword ..iv Introduction. ..V 1 Scope. ..1 2 Normative references ... 3 Terms and definitions ..2 3.1 Generalterms .2 3.2 Terms related to differential pressure. ..2 4 Symbols. ..4 5 General procedures ..5 6 Test equipment .5 7 Measuring instrument accuracy and test condition variations ..6 8 Filterperformancetestcircuitvalidationprocedures .7 8.1 Filter test system validation. .7 8.2 Validationofcontaminantinjectionsystem .8 9 Summary of information required prior to testing .9 10 Preliminary preparation .9 10.1 Test filter assembly. .9 10.2 Contaminant injection system. .10 10.3 Filtertest system .11 11 Filterperformancetest. ..12 12 Calculations ..13 13 Data presentation ..15 14 Identification statement ..17 Annex A (normative) Base test-fluid properties ..20 Annex B (informative) Test system design guide .22 Annex C (informative) Examples ofreport calculations and graphs .28 Annex D (informative) Summary of data from the interlaboratory test programme conductedtoverifytheprocedureinthisdocument ..37 Bibliography. .43 iii IS0 2022-Allrightsreserved