ISO INTERNATIONAL STANDARD 7986 Firstedition 1997-07-15 Hydraulic fluid power -- Sealing devices Standard test methods to assess the performance of seals used in oil hydraulic reciprocating applications Transmissions hydrauliques -- Dispositifs d'étancheite - Methodes d'essai normalisées d'evaluation des performances des joints utilisés dans des applications alternatives a I'huile hydraulique This material is reproduced from iso documents under International Organization for Standardization (Iso) Copyright License number IHS/ICC/1996. Not for resale. No part of these So documents may be reproduced in anyform,electronic retrieval system orotherwise,exceptas 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 73410 79),IHS or theISo Licensor's members. ISO Reference number ISO 7986:1997(E) Copyright International Organization for Standardization Not for Resale ISO 7986:1997(E) Contents Page 1 Scope 1 2 Normative references 1 3 Symbols 2 4 Test installation 2 4.1 General 23 4.2 Mechanical details Testparameter 33 5 5.1 Test fluid 5.2 Testfluidtemperature 5.3 Testhousingrodbearings 5.4 Testfluidpressure 4 5.5 Speed of linear actuator, 4 5.6 Pressure and stroke cycle for dynamic test . 4 6 Assembly and dismantling of seals 4 Methods of measurement and measuring apparatus 4 > 7.1 Seal leakage 4 7.2 Seal friction ....... 455 7.3 Pressuremeasurement 7.4 Surface roughness .... 7.5 Temperaturemeasurement 6 8 Calibration 9 9 Test procedure 6 9.1 Test programme 6 9.2 Repeatseries 7 10 Presentation of results 7 11 Identification statement (Reference to this International Standard) 7 Annexes A Seal and seal housing dimension data forms 15 B Test results 17 c Seal performance report 18 D Bibliography 20 @ISO1997 All rights reserved. Unless otherwise specified, no part of this publication may be photocopying and microfilm, without permission in writing from the publisher. 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 Switzertand i Copyright International Organization for Standardization without license from IHS Not for Resale ISO 7986:1997(E) @ISO 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 circuiated to the member bodies for voting. Publication as an International a vote. ISO/TC131,Fluidpower systems, SubcommitteeSC7,Sealing devices. Annexes A, B and C form an integral part of this International Standard. Annex D is for information only. ili Copyright International Organization for Standardization No reprodi without license from IHS Not for Resale