1、BSI Standards PublicationBS ISO 14960-2:2014Tubeless tyres Valves andcomponentsPart 2: Clamp-in tubeless tyre valve-testmethodBS ISO 14960-2:2014 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of ISO 14960-2:2014.The UK participation in its preparation was entrusted
2、to TechnicalCommittee AUE/4, Tyres and wheels for motor vehicles.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not purport to include all the necessaryprovisions of a contract. Users are responsible for its correctapplication.
3、The British Standards Institution 2014. Published by BSI StandardsLimited 2014ISBN 978 0 580 83207 9ICS 83.160.01Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStandards Policy and Strategy Committee on 30
4、 November 2014.Amendments issued since publicationDate Text affectedBS ISO 14960-2:2014 ISO 2014Tubeless tyres Valves and components Part 2: Clamp-in tubeless tyre valve-test methodPneumatiques sans chambre Valves et composants Partie 2: Mthodes dessai pour les valves visserINTERNATIONAL STANDARDISO
5、14960-2First edition2014-11-01Reference numberISO 14960-2:2014(E)BS ISO 14960-2:2014ISO 14960-2:2014(E)ii ISO 2014 All rights reservedCOPYRIGHT PROTECTED DOCUMENT ISO 2014All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form
6、or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below or ISOs member body in the country of the requester.ISO copyright officeCase postale 56 CH-
7、1211 Geneva 20Tel. + 41 22 749 01 11Fax + 41 22 749 09 47E-mail copyrightiso.orgWeb www.iso.orgPublished in SwitzerlandBS ISO 14960-2:2014ISO 14960-2:2014(E)Contents PageForeword iv1 Scope . 12 Normative references 13 Test methods and performance requirements . 13.1 Valve core . 13.2 Valve cap seal
8、33.3 Valve-to-rim seal 33.4 Valve mechanical resistance 53.5 Environmental resistance 5Bibliography 7 ISO 2014 All rights reserved iiiBS ISO 14960-2:2014ISO 14960-2:2014(E)ForewordISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO mem
9、ber 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, governmen
10、tal 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.The procedures used to develop this document and those intended for its further maintenance
11、are described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the different types of ISO documents should be noted. This document was drafted in accordance with the editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).Attention is
12、 drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of any patent rights identified during the development of the document will be in the Introduction and/or
13、 on the ISO list of patent declarations received (see www.iso.org/patents).Any trade name used in this document is information given for the convenience of users and does not constitute an endorsement.For an explanation on the meaning of ISO specific terms and expressions related to conformity asses
14、sment, as well as information about ISOs adherence to the WTO principles in the Technical Barriers to Trade (TBT) see the following URL: Foreword - Supplementary information.The committee responsible for this document is Technical Committee ISO/TC 31, Tyres, rims and valves, Subcommittee SC 9, Valve
15、s for tube and tubeless tyres.This first edition of ISO 14960-2, together with ISO 14960-1, cancels and replaces ISO 14960:2004, which has been technically revised.ISO 14960 consists of the following parts, under the general title Tubeless tyres Valves and components: Part 1: Test methods Part 2: Cl
16、amp-in tubeless tyre valve-test methodiv ISO 2014 All rights reservedBS ISO 14960-2:2014INTERNATIONAL STANDARD ISO 14960-2:2014(E)Tubeless tyres Valves and components Part 2: Clamp-in tubeless tyre valve-test method1 ScopeThis part of ISO 14960 establishes minimum specifications for clamp-in tubeles
17、s tire valves. A clamp-in valve is an assembly of a valve stem, valve core, valve cap, rubber grommet or O-ring, hex nut, and ring washer which conforms to ISO 9413.2 Normative referencesThe following documents, in whole or in part, are normatively referenced in this document and are indispensable f
18、or its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.ISO 9413, Tyre valves Dimensions and designationISO 9227, Corrosion tests in artificial atmospheres Salt spray tests3 Tes
19、t methods and performance requirements3.1 Valve core3.1.1 Valve core specificationsValve cores installed in clamp-in valve assemblies (see Figure 1) shall have a pin height tolerance of -090025,+mm, relative to the valve mouth, and a standard torque of 0,23 N m to 0,34 N m.3.1.2 Room temperature tes
20、t3.1.2.1 Test procedurea) Immerse the valve assembly vertically in clean water at 23 C 5 C not more than 25 mm below the surface of the water (see Figure 1).b) Check for leakage using a pressure of 35 kPa 5 kPa.3.1.2.2 Performance requirementThe leak rate shall not be greater than 0,2 cm3/min.3.1.3
21、Low temperature test3.1.3.1 Test procedurea) Depress and release the valve core pin once after a 24 h minimum exposure at 40 C 3 C; maintain pressure at 180 kPa 15 kPa. See Figure 1. ISO 2014 All rights reserved 1BS ISO 14960-2:2014ISO 14960-2:2014(E)b) Immerse the valve assembly vertically in ethan
22、ol or methanol at 40 C 3C not more than 25 mm below the surface with the pressure maintained at 180 kPa 15 kPa.c) Begin leak detection after a 1 min soak period.d) Increase pressure to 1,4 MPa 0,15 MPa.e) Begin leak detection after 1 min soak period.3.1.3.2 Performance requirementThe leak rate shall
23、 not be greater than 0,2 cm3/min.3.1.4 High temperature test3.1.4.1 Test procedurea) Depress and release the valve core pin once after a 48 h minimum soak period at 100 C 3 C; maintain pressure at 1,4 MPa 0,15 MPa. See Figure 1.b) Check for leakage with 66 C 3 C clean water at not more than 25 mm ab
24、ove the valve mouth, with the pressure maintained at 1,4 MPa 0,15 MPa.3.1.4.2 Performance requirementThe leak rate shall not be greater than 0,2 cm3/min.Dimensions in millimetresKey1 regulator2 gaugeaAir supply.bLiquid level.Figure 1 Valve seal test set-up3.1.5 Valve core torque test3.1.5.1 Test pro
25、cedureWith a calibrated torque wrench, torque the core on the valve twice the maximum specified torque. Remove the core and examine for separation of the swivel from the barrel, and barrel gasket from the barrel.2 ISO 2014 All rights reservedBS ISO 14960-2:2014ISO 14960-2:2014(E)3.1.5.2 Performance
26、requirementThe core shall come out of the valve without separation.3.1.6 Cycle test3.1.6.1 Test procedurea) With the valve pressurized to 1,4 MPa, depress the valve core pin to its maximum travel 120 times.b) Immerse the valve assembly vertically in clean water at 23 C 5 C not more than 25 mm below
27、the surface of the water (see Figure 1).c) Check for leakage using a pressure of 1,4 MPa 0,15 MPa.3.1.6.2 Performance requirementThe leak rate shall not be greater than 0,2 cm3/min.3.1.7 Air flow test3.1.7.1 Test procedureThe valve with core shall be attached to a standard inflation chuck with depre
28、ssor pin. Measure the air flow through the tire valve with 690 kPa pressure applied.3.1.7.2 Performance requirementThe valve shall flow a minimum of 100 l/min.3.2 Valve cap seal3.2.1 Room temperature test (optional, for sealing caps only)3.2.1.1 Test procedurea) Screw the cap with a sealing gasket a
29、t 0,15 N m to 0,20 N m torque on a valve without a core.b) Immerse the valve assembly vertically in clean water at 23 C 5C not more than 25 mm below the surface of the water (see Figure 1).c) Check for leakage using a 1,4 MPa 0,15 MPa test pressure.3.2.1.2 Performance requirementThe leak rate shall
30、not be greater than 0,2 cm3/min.3.3 Valve-to-rim seal3.3.1 Temperature TestValves with grommets shall be tested in accordance with the Table 1.It is not required to test valves with O-rings to the maximum and minimum values of rim hole diameter and rim thickness.Minimum and maximum values are accord
31、ing to ISO 9413 for the particular valve being tested. ISO 2014 All rights reserved 3BS ISO 14960-2:2014ISO 14960-2:2014(E)Table 1 Temperature testTrial FactorRim hole diameter Rim thickness Installation torque1Maximum -0 050,Minimum 0,05 Minimum 5 %2Maximum -0 050,Maximum 0,05 Maximum 5 %3Minimum 0
32、005+ ,Minimum 0,05 Maximum 5 %4Minimum 0005+ ,Maximum 0,05 Minimum 5 %3.3.2 Low temperature test3.3.2.1 Test procedurea) Subject the valves to 40 C 3 C for 24 h at 180 kPa 15 kPa.b) Immerse the valve assembly vertically in ethanol or methanol at -40 C 3 C not more than 25 mm below the surface with t
33、he pressure maintained at 180 kPa 15 kPa. See Figure 1.c) Begin leak detection after a 1 min period.d) Increase pressure to 1,4 MPa 0,15 MPa.e) Begin leak detection after 1 min period.3.3.2.2 Performance requirementThe leak rate shall not be greater than 0,2 cm3/min.3.3.3 High temperature test3.3.3.
34、1 Test procedurea) Subject the valves to 100 C 3 C for 72 h at 1,4 MPa 0,15 MPa.b) Check for leakage with 66 C 3 C clean water at not more than 25 mm above the valve mouth, with the pressure maintained at 1,4 MPa 0,15 MPa. See Figure 1.3.3.3.2 Performance requirementThe leak rate shall not be greate
35、r than 0,2 cm3/min.3.3.4 Peak temperature test3.3.4.1 Test procedureSubject the valves to 135 C 3 C at 1,4 MPa for 1 h.Submerge the fixture in water at 66 C 3 C and check for leakage at the valve core and grommet/rim interface.4 ISO 2014 All rights reservedBS ISO 14960-2:2014ISO 14960-2:2014(E)3.3.4
36、.2 Performance requirementThe leak rate shall not be greater than 0,2 cm3/min.3.4 Valve mechanical resistance3.4.1 Torque test3.4.1.1 Test procedureUsing a calibrated torque wrench, tighten the hex nut on the valve to two times the maximum installation torque given in ISO 9413, then unscrew immediat
37、ely.3.4.1.2 Performance requirementNo mechanical breakage of either the nut or the valve is permitted.3.4.2 High pressure test3.4.2.1 Test procedureAt 23 C 5 C, apply 4,2 MPa pressure (pneumatic or hydraulic) to the valve. Maintain this pressure for 3 min.3.4.2.2 Performance requirementThe valve sha
38、ll not burst.3.5 Environmental resistance3.5.1 Ozone test3.5.1.1 Test procedureAge the seal (unmounted) for 72 h at 100 C 3 C.Assemble the seal on a fixture 10 % larger than the stem diameter where the seal sits.Expose the assembled seal to 100 5 parts of ozone to 100 million parts of air at 38 C 3
39、C for 72 h. Then, remove the seals from the ozone chamber and examine the rubber grommet or O-ring at a magnification of 5x for cracks.3.5.1.2 Performance requirementThe rubber grommet shall not exhibit any cracks when viewed at a 5x magnification.3.5.2 Salt fog test3.5.2.1 Test procedureAssemble va
40、lves on steel and alloy fixtures representative of real rims, and expose assemblies for 240 h minimum of salt fog in accordance with ISO 9227, NSS test. ISO 2014 All rights reserved 5BS ISO 14960-2:2014ISO 14960-2:2014(E)3.5.2.2 Performance requirementNo corrosion shall alter the functionalities of
41、the valve. The leak rate at 1,4 MPa shall not be greater than 0,2 cm3/min. The valve can be disassembled from the rim.6 ISO 2014 All rights reservedBS ISO 14960-2:2014ISO 14960-2:2014(E)Bibliography1 ISO 20562, Tyre valves ISO core chambers No. 1, No. 2, No. 3 and No. 4 ISO 2014 All rights reserved
42、7BS ISO 14960-2:2014ISO 14960-2:2014(E) ISO 2014 All rights reservedICS 83.160.01Price based on 7 pagesThis page deliberately left blankBSI is the national body responsible for preparing British Standards and other standards-related publications, information and services.BSI is incorporated by Royal
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