ISO INTERNATIONAL STANDARD 4548-2 First edition 1997-09-15 Methods of test for full-flow lubricating oil filters for internal combustion engines - Part 2: Element by-pass valve characteristics Methodes d'essai des filtres a huile de lubrification a.passage integral pour moteursacombustioninterne Partie 2: Caracterisques de I'organe de derivation du filtre This materia! is reproduced from Iso documents under International Organization for Standardization (Iso) Copyright License number IHS/IcC/1996. Not for resaie. No part of these ISo documents may be reproduced in any form, electronic retrieval system or otherwise, except as allowed in the copyright law of the country of use, or with the prior written consent of ISO (Case postale 56, 1211 Geneva 20, Switzerland, Fax +41 22 734 10 79), IHs or the isO Licensor's members. OSI Reference number ISO 4548-2:1997(E) nternational Organization for Standardizatior Ise with ISO No reproduction or networking permited withoutlicensefrom IHS Not for Resale ISO 4548-2:1997(E) Contents 1 Scope 2 Normative references 3Definitions 4 Graphical symbols 5 Operational characteristics to be tested 6 Filter to be tested.. 6.1 Filter assembly. 6.2 By-pass valve 7 Test rig... 7.1Sump 7.2 Regulating valves . 7.3 Flow meter 7.4 Inlet and outlet pipes to the filter .. 7.5 Discharge pipe from sampling valve. 8Test liguids. 9Accuracyoftestconditionmeasurements.. 10 Test procedure 11Reportoftestresults Annex A (informative) Bibliography .. @ISO1997 All rights reserved.Unlessotherwisespecified,nopartofthispublicationmaybereproducedorutilized inanyformorbyanymeans,electronic Intermational 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 right Intermational Organization for Standardizatio irom IHS @ISO ISO 4548-2:1997(E) Foreword member bodies). The work of preparing International Standards is normally carriedcout through IsO technical the right to be represented on that committee. Intemational 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 circulated to the: member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. Intemational Standard ISO 4548-2 was prepared by Technical Committee iSO/TC 70, Internal combustion engines, Subcommittee SC 7, Tests for lubricating oil filters. This second edition cancels and replaces the first edition (IsO 4548-2:1982), which has'been technically revised. Iso 4548 consists of the following parts, ilunder the general title Methods of test for fullflow lubricating oil filters for internal combustion engines: -Part 1: Differential pressure/flow characteristics Part 2: Element by-pass valve characteristics - Part 3: Resistance to high differential pressure and to elevated temperature Part 4: Initial particle retention efficiency, life and cumulative efficiency (gravimetric method) --- Part 5: Cold start simulation and hydraulic pulse durability test Part6:Static burst pressuretest - Part 7: Vibration fatigue test -- Part 9: Inlet and outlet anti-drain valve tests - Part 10: Life and cumulative efficiency in the presence of water in oil - Part 11: Self-cleaning filters Annex A of this part of ISO 4548 is for information only. Not for Resi