ISO INTERNATIONAL STANDARD 9461 First edition 1992-12-15 Hydraulic fluid power --- Identification of valve ports, subplates, control devices and solenoids Transmissions hydrauliques -Identification des orifices des appareils, embases, organes de commande et solénoides Reference number ISO9461:1992(E) Copyright International Organization for Standardization st andar d99s ISO9461:1992(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 committees. Each member body interested in a subject for which a technical committee has been established has 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. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. International Standard ISO 9461 was prepared by Technical Committee ISO/TC 131, Fluid power systems, Sub-Committee SC 5, Control products andcomponents. Annex A of this International Standard is for information only. ISO1992 All rights reserved. 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 per- mission in writing from the publisher. International Organizationfor Standardization CasePostale56·CH-1211Geneve20·Switzerland Printed in Switzerland ii CopyrightIntermational Organization for Standardization 75001, User=b, qu No repro standard999 ISO9461:1992(E) Introduction This International Standard complies as closely as possible with the rules for the identification of valve ports specified in previously published Inter- national Standards, in particular those concerning valves on subplates (i.e. ISO4401,ISO5781,ISO6263andISO6264) These four International Standards are however, somewhat extensive as they were expected to cover most of the current marking practices. To remedy this situation, this International Standard give rules corre- the identification of any new valve. In hydraulic fluid power systems, power is transmitted and controlled through a liquid under pressure within an enclosed circuit. Fluid distribu- tion and regulation are achieved by means of hydraulic valves which may be, mounted on, subplates. Valves, subplates, control devices sand solenoids should be marked to ensure correct assembly and connection tothe intended pipe or hose end. ii CopyrightIintenational Oorganizatin for Standardization, ds Bodies 75001, User=b, qu standard999