ISO INTERNATIONAL STANDARD 4020 First edition 2001-12-15 Road vehicles Fuel filters for diesel engines Test methods Véhicules routiers Filtres a combustible pour moteurs diesels - Methodesd'essai Reference number ISO 4020:2001(E) So @ ISO 2001 ISO 4020:2001(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobe's licensing policy, this file may be printed or viewed but shall not file, parties accept therein the responsibility of not infringing Adobe's licensing policy. The ISO Central Secretariat accepts no liability in this area. Adobe is atrademark of Adobe Systems Incorporated. Details of the software products used to create this PDF file can be found in the General Info relative to the file; the PDF-creation parameters were optimized for printing. Every care has been taken to ensure that the file is suitable for use by IsO member bodies. In the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below. @ISO 2001 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either isO at the address below or IsO's member body in the country of the requester. ISO copyright office Case postale 56 . CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail [email protected] Web www.iso.ch Printed in Switzerland @ ISO 2001 - All rights reserved ISO 4020:2001(E) Contents Page Foreword.. 1 Scope 2 Normativereferences. 3 Terms and definitions . 4 Flow rates 5 Test materials 5.1 Test liquid.. 5.2 Test contaminants for tests to determine instantaneous filtration efficiency and filter life.. 5.3 Test installation, general.... 6 Tests. 6.1 Testforcleanlinessofnewfilters 6.2 Fabrication integrity test. 6.3 Test for differential pressure of new filters... 6.4 Test for instantaneous filtration efficiency and filter life 6.5 Test for water separation efficiency ... 14 6.6 Collapse/burst test of the filter element... 16 6.7 Bursttest of completefilters 6.8 Pulsating pressure fatigue test .... 6.9 Vibration resistance fatigue test. 20 Annex A (normative) Test liquid for fuel filter test . Annex B (normative) Test installations , 22 Annex C (normative) Organic contaminant... ...37 Annex D (normative) Specification for carbon black powder used for the organic contaminant concentrate .... .40 Annex E (normative) Supplementary details for water separation test .... ..42 Annex F (normative) Determination of the insoluble content .. 44 Annex G (normative) Diagram for showing instantaneous filtration efficiency and differential pressure versus choking time ... Bibliography.. nserved ili