ISO INTERNATIONAL STANDARD 6264 Second edition 1998-03-01 Hydraulic fluid power Pressure-relief valves Mounting surfaces Transmissions hydrauliques Limiteurs de pression Plan de pose ISO Reference number ISO 6264:1998(E) by IHS under lic Not for Resale ISO 6264:1998(E) 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 the right to be represented 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 circulated to the member bodies for voting. International Standard ISO 6264 was prepared by Technical Committee ISO/TC 131, Fluid power systems, SubcommitteeSC5,Controlproductsandcomponents. This second edition cancels and replaces the first edition (isO 6264:1987), of which it constitutes a technical revisions. Annex A of this International Standard is for information only. @ISO1998 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic InternationalOrganizationforStandardization Case postale 56·CH-1211 Geneve 20·Switzerland Internet [email protected] X.400 C=ch; a=400net; p=iso; 0=isocs; S=central Printed in Switzerland Copyright International Organization for Standardization from IHS Not for Resale @ISO ISO 6264:1998(E) Introduction enclosed circuit. Hydraulic valves are typical components in such systems. These devices control the flow direction, pressure or flow rate of liquids in the enclosed circuit. aadzao ili nehworking permited without license from IHs Not for Resale