ISO INTERNATIONAL STANDARD 9475 First edition 1994-12-01 Aircraft inner tube and tubeless tyre valves Cores and caps Test methods Valves pour pneumatiques d'aéronef avec ou sans chambre Mécanismes et bouchons de valves Méthodes d'essai ISO Reference number ISO 9475:1994(E) Copyright International Organization for Standardization No reproduction or networking permited without license from IHS e with ISC Not for Resale ISO 9475:1994(E) Foreword ISO (the International Organization for Standardization) is a worldwide of preparing International Standards is normally carried out through Iso technical committees. Each member body interested in a subject for which a technica! 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 9475 was prepared by Technical Committee ISO/TC 31,Tyres, rims and valves, Subcommittee SC 9, Valves for tube and tubeless tyres. 1SO 1994 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced microfilm, without permission in writing from the publisher. International Organization for Standardization Case Postale 56 · CH-1211 Geneve 20 · Switzerland Printed in Switzerland ii Copyright Intermational Organization for Standardization No reproduction or r g permitted without license from IHS Not for Resale INTERNATIONAL STANDARD ISO ISO 9475:1994(E) Aircraft inner tube and tubeless tyre valves - Cores and caps - Test methods 1 Scope under the test conditions are obligatory. The pro- cedure and certain additional performance require- This International Standard specifies the test methods ments shall be fixed by agreement between the valve used for valve cores and caps for aircraft tyres, with manufacturer and the client, with an obligation to orwithout inner tubes,and minimum airtightness meet the minimum airtightness requirements defined standards. It constitutes a detailed method allowing in this International Standard. products to be evaluated on the same basis, and re- sults to be compared. 4 Valve cores 2 Normative references 4.1 Types of tests Aircraft tyre valve cores shall be submitted to the fol- The following standards contain provisions which, through reference in this text, constitute provisions lowingtests: of this International Standard. At the time of publi- a) tightening torque test (4.4.1); cation, the editions indicated were valid. All standards are subject to revision, and parties to agreements b) washout test (4.4.2); based on this International Standard are encouraged to investigate the possibility of applying the most re- c) blowout test (4.4.3); cent editions of the standards indicated below. Members of IEC and ISO maintain registers of cur- d) pressurized pulse test (4.4.4); rently valid International Standards. e) environmental tests at low temperature (4.4.5); IsO 37:1994, Rubber, vulcanized or thermoplastic Determination of tensile stress-strain properties. environmentaltestsatconstanthightemperature (4.4.6); ISO 48:1994, Rubber, vulcanized or thermoplastic Determination of hardness (hardness between 10 g) environmental tests at peak high temperature IRHD and 100 IRHD). (4.4.7). IsO 815:1991, Rubber, vulcanized or thermoplastic 4.2 Minimum airtightness requirements - Determination of compression set at ambient, el- evated or low temperatures. Valve cores shall be rejected if the leakage rate during IsO 868:1985, Plastics and ebonite tests is greater than 0,2 cm3/min. Determination of indentation hardness by means of a durome