BS ISO BRITISH STANDARD 3601-4:2008 Fluid power systems O-rings Part 4: Anti-extrusion rings (back-up rings) ICS 23.100.60; 83.140.50 BSi NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW British Standards BS ISO 3601-4:2008 National foreword This British Standard is the UKimplementation of ISO3601-4:2008 The UK participation in its preparation was entrusted to Technical Committee MCE/11, Fluid seals and their housings. A list of organizations represented on this committee can be obtained on request to its secretary. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard cannot confer immunity from legal obligations. This British Standard Amendments/corrigenda issued since publication was published under the authority of the Standards Policy and Strategy Date Comments Committee on 31 July 2008 BSI 2008 ISBN 978 0 580 56330 0 BS ISO 3601-4:2008 INTERNATIONAL ISO 3601-4 STANDARD First edition 2008-06-01 Fluid power systems O-rings Part 4: Anti-extrusion rings (back-up rings) Transmissionshydrauliques etpneumatiques-Jointstoriques Partie4:Baguesanti-extrusion Reference number ISO 3601-4:2008(E) @ISO2008 BS ISO 3601-4:2008 ISO 3601-4:2008(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 downloading this 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 a trademark 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. COPYRIGHTPROTECTEDDOCUMENT ISO2008 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 Casepostale56.CH-1211Geneva20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail [email protected] Web www.iso.org Published in Switzerland ii @Is0 2008-All rights reserved BSISO 3601-4:2008 ISO3601-4:2008(E) Contents Page Foreword. IV Introduction 1 Scope 2 Normativereferences. 3 Terms and definitions 4 Symbols.. 5 General requirements related to O-ring housings 6 Types ofanti-extrusion (back-up)rings. 6.1 Spiraltype,T1 6.2 Angle cut type, T2 6.3 Solid type, T3...... 6.4 Anglecut concavetype, T4. 6.5 Solid concave type, T5. 7 Positioning of anti-extrusion rings in housings.. .8 8 Anti-extrusion ringdesignation code and materials. 8.1 Designation code. 8.2 Materials. .9 9 Dimensionsandtolerances. .9 9.1 Axial and radial widths of anti-extrusion rings.. 9.2 Outside diameters of anti-extrusion rings for piston sealing applications .10 9.3 Inside diameters of anti-extrusion rings for rod sealing applications. 11 10 Identificationstatement (referencetothispartof ISO3601).. @ISO 2008-Allrights reserved ii BS ISO 3601-4:2008 ISO 3601-4:2008(E) Foreword IsO (the International Organizationfor Standardization) is a worldwide federationof national standards bodies technical committees.Each member body interested in a subject for which a technical committee has been 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. InternationalStandardsaredraftedinaccordancewiththerulesgivenintheISO/lECDirectives,P