ISO INTERNATIONAL STANDARD 4548-4 First edition 1997-12-01 Methods of test for full-flow lubricating oil filters for internal combustion engines Part 4: Initial particle retention efficiency, life and cumulative efficiency (gravimetric method) Methodes d'essai des filtres a huile de lubrification a passage integral pour moteursacombustioninterne Partie 4: Efficacite initiale, capacité de retention et efficacite cumulée (methode gravimetrique) Inis material is reproduced trom isu documents under international Organization for Standardization (ISo) Copyright License number IHS/lCC/1996.Notforresale.NopartoftheseISOdocumentsmaybe reproducedinanyform,electronicretrieval systemorotherwise,exceptas aliowed in the copyright law of the country of use, or with the prior written consentofISO(Casepostale56,1211Geneva20,Switzerland,Fax+4122 734 10 79), IHs or the ISo Licensor's members. ISO Reterence number ISO 4548-4:1997(E) No reproduction or networking permited without license from IHS Not for Resale ISO 4548-4:1997(E) Contents Page Section 1: General 1 1.1 1 1.2 Normative references 1 1.3 Definitions 2 1.4 Graphical symbols 2 Section 2: Initial particle retention efficiency 3 2.1 Operational characteristics to be assessed 3 2.2 Test rig 3 2.3 Test liquids 4 2.4 Test contaminant 5 2.5 Test procedure 6 2.6 Test results and calculations 8 2.7 Report of test results for initial particle retention efficiency 9 Section 3: Life and cumulative efficiency 11 3.1 Operationalcharacteristicstobeassessed 11 3.2 Test rig .... 11 3.3 Periodic checks on equipment 12 3.4 Test liquids 12 3.5 Test contaminant 13 3.6 Test procedure ...... 13 3.7 Test results and calculations 17 3.8 Report of test results for life and cumulative efficiency 18 Annexes A Test parameters for initial particle retention efficiency test ... 19 B Method for determining insolubles in test liquid samples for 20 c Test parameters for life and cumulative efficiency test 24 D Method for determining insolubles in test liquid samples for cumulative efficiency ......... 25 E Details of equipment used in the mixing of test dust and liquid 28 Bibliography 30 @1SO1997 All rights reserved.Unless otherwise specified, no part of this pubtication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from the publisher. International Organization for Standardization Case postale 56 . CH-1211 Geneve 20 · Switzerland Internet [email protected] X.400 C=ch; a=400net; p=iso; O=isocs; S=central Printed in Switzerland on for Standardization vided by IHS t No reproduction or networking permited without license from IHS Not for Resale ISO 4548-4:1997(E) @ISO Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (IsO member bodies). The work of preparing International Standards is normally carried out through Iso technical committees. Each member body interested in a subject for which on that committee.International organizations,governmental and non- governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. Draft International Standards adopted by the technical committees are circulatedtothe memberbodiesforvoting.PublicationasanInternational Standard requires approval by at least 75 % of the member bodies casting a vote. International Standard ISO 4548-4 was prepared by Technical Committee ISO/TC 70, International combustion engines, subcommittee SC 7, Tests for lubricating oil filters. IsO 4548 will consists of the following parts, under the general title Method of test for full-flow lubricating oil filters for internal combustion engines: Part 1: Differential pressure/flow characteristics Part 2: Elements by-pass component characteristics Part 3: Resistance to high differential pressure and to elevated t