ISO INTERNATIONAL STANDARD 7295 Second edition 1988-04-01 INTERNATIONALORGANIZATION FOR STANDARDIZATION ORGANISATION INTERNATIONALE DE NORMALISATION ME>KAYHAPOAHAA OPIAHM3ALM NO CTAHAAPTW3ALWM Tyre valves for aircraft -- Interchangeability dimensions Valves pour pneumatiques d'aeronefs - Dimensions d'interchangeabilite Referencenumber ISO 7295 : 1988 (E) Not for Resale ISO 7295:1988(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, govern- mental and non-governmental, in liaison with ISO, also take part in the work. IsO col- laborates closely with the International Electrotechnical Commission (IEC) on all mat- ters of electrotechnical standardization. Draft International Standards adopted by the technical committees are circulated to the member bodies for approval before their acceptance as International Standards by the ISo Council. They are approved in accordance with ISO procedures requiring at least 75 % approval by the member bodies voting. International Standard ISO 7295 was prepared by Technical Committee ISO/TC 31, Tyres, rims and valves. This second edition cancels and replaces the first edition (IS0 7295 : 1982), of which it constitutes a minor revision. Annex A forms an integral part of this International Standard. International OrganizationforStandardization,1988 Printed in Switzerland ed without license from IHS Not for Resale INTERNATIONAL STANDARD ISO 7295 : 1988 (E) Tyre valves for aircraft - Interchangeability dimensions Scope Dimensions and tolerances 1 3 This International Standard specifies the basic dimensional re- 3.1 The dimensions ensuring interchangeability between the quirements for interchangeability of tyre valve core with the tyre valve stem, core and cap shall be in accordance with the tyre valve stem and to permit assembly of the cap and ground normal commercial design of the tyre valve manufacturer. inflation connection of the source of compressed air or nitrogen supply to the tyre. Figures 1 and 2 illustrate the general assembly of the stem, core and cap for both long and short cores. Functional requirements of the valve core or valve cap are not 3.3 Figures 3 and 4 present dimensions essential for inter- covered by this International Standard. changeability between stem and cap, and stem and core. The core chamber in the valve stem shall accommodate the long valve core to ensure that both the long and short valve cores may be used as required. 2 Normative references 3.4 Figures 5, 6 and 7 specify the interchangeability dimen- The following standards contain provisions which, through sions for short and iong cores of the tyre valve. reference in this text, constitute provisions of this International Standard. At the time of publication, the editions indicated Figure 8 specifies the dimensions necessary for the cap 3.5 were valid. All standards are subject to revision, and parties to assembly intended for a sealable connection on valves having a agreements based on this International Standard are encour- thread as given in figure 3 and a valve mouth as described in aged to investigate the possibility of applying the most recent note 2 of figure 3. editions of the standards listed below. Members of IEC and ISO maintain registers of currently valid International Standards. 3.6 A tyre valve assembled in an aircraft wheel fitted to an aircraft shall have an access space sufficient to enable connec- ISO 4570-1 : 1977, Tyre valve threads - Part 1 : Threads 5V1, tion of the ground inflation hose and connector, and also for 5V2, 6V1 and 8V1. assembly of the valve core and valve cap, when arctic gloves are worn. This access space shal