BS ISO 14960-1-2014 Tubeless tyres Valves and components Test methods《无内胎轮胎 阀门和元件 试验方法》.pdf

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1、BSI Standards PublicationBS ISO 14960-1:2014Tubeless tyres Valves andcomponentsPart 1: Test methodsBS ISO 14960-1:2014 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of ISO 14960-1:2014.The UK participation in its preparation was entrusted to TechnicalCommittee AUE/4

2、, 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. The British Standards Insti

3、tution 2014. Published by BSI StandardsLimited 2014ISBN 978 0 580 83206 2ICS 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 November 2014.Amendments i

4、ssued since publicationDate Text affectedBS ISO 14960-1:2014 ISO 2014Tubeless tyres Valves and components Part 1: Test methodsPneumatiques sans chambre Valves et composants Partie 1: Mthodes dessaiINTERNATIONAL STANDARDISO14960-1First edition2014-11-01Reference numberISO 14960-1:2014(E)BS ISO 14960-

5、1:2014ISO 14960-1:2014(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 or by any means, electronic or mechanical, including photocopying, or posting

6、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-1211 Geneva 20Tel. + 41 22 749 01 11Fax + 41 22 749 09 47E-mail copyrightiso.o

7、rgWeb www.iso.orgPublished in SwitzerlandBS ISO 14960-1:2014ISO 14960-1:2014(E)Contents PageForeword iv1 Scope . 12 Normative references 13 Terms and definitions . 14 Methods for testing tubeless tyres snap-in valves . 14.1 Description of a snap-in valve 14.2 Test fixtures . 14.3 Installation 24.4 L

8、imit case for valves . 25 Test methods and performances requirements 25.1 Adhesion . 25.2 Valve core seal 35.3 Valve cap seal (optional, for sealing caps only) . 45.4 Valve to rim seal . 55.5 Installation tests 75.6 Burst . 85.7 Ozone resistance 85.8 Flexing resistance . 9Bibliography .10 ISO 2014 A

9、ll rights reserved iiiBS ISO 14960-1:2014ISO 14960-1:2014(E)ForewordISO (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 committ

10、ees. 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 Int

11、ernational Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.The procedures used to develop this document and those intended for its further maintenance are described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the di

12、fferent 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 drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO sh

13、all 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 on the ISO list of patent declarations received (see www.iso.org/patents).Any trade name used in this document

14、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 assessment, as well as information about ISOs adherence to the WTO principles in the Technical Barriers to Trade (TBT

15、) see the following URL: Foreword - Supplementary information.The committee responsible for this document is ISO/TC 31, Tyres, rims and valves, Subcommittee SC 9, Valves for tube and tubeless tyres.This first edition of ISO 14960-1, together with ISO 14960-2, cancels and replaces ISO 14960:2004, whi

16、ch 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: Clamp-in tubeless tyre valve-test methodiv ISO 2014 All rights reservedBS ISO 14960-1:2014INTERNATIONAL STANDARD ISO 14960-1:2014(E)Tu

17、beless tyres Valves and components Part 1: Test methods1 ScopeThis part of ISO 14960 specifies test methods for snap-in tubeless tyre valves intended for, but are not limited to, highway applications.2 Normative referencesThe following documents, in whole or in part, are normatively referenced in th

18、is document and are indispensable for 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 3877-2, Tyres, valves and tubes List of equivalent terms Part 2: Tyre valves3 Ter

19、ms and definitionsFor the purposes of this document, the terms and definitions given in ISO 3877-2 and the following apply.3.1snap-in valvetyre valve having a rigid housing adhered to a resilient body designed to retain and seal the valve in the rim hole4 Methods for testing tubeless tyres snap-in v

20、alves4.1 Description of a snap-in valveA snap-in valve is a unit free of rubber in the air passage, no rubber or cement above the second thread on the housing, and without flow cracks, blisters, voids, or other moulding defects. The mould parting line flash should not exceed 1,3 mm in height and 0,1

21、5 mm thickness at the outer edge.4.2 Test fixturesBreak both edges on both sides of the valve hole either by a 45 chamfer or a radius from 0,3 mm to 0,4 mm. Emery cloth or suitable tooling is recommended. It is recommended that material of the test fixture be representative of the material of the ac

22、tual rim.The primary external seal of a “snap-in” valve in a valve hole is obtained from the rubber compression of the valve body onto the internal surface of the valve hole. Secondary external sealing may be present by the contact of the remainder of the valve body exterior to the surface of the ma

23、terial around the valve hole. Either of both of these seals can be affected by the compound curvatures in the wheel rims and by stock thickness. See Table 1. ISO 2014 All rights reserved 1BS ISO 14960-1:2014ISO 14960-1:2014(E)Table 1 Test FixturesDimensions in millimetresNominal holeDiameter11,3 mmD

24、iameter15,7 mmTest Test hole Plate thickness Test hole Plate thicknessValve to rim seal test low and high temperature test (see 5.4.1 and 5.4.2)11 70050,+1,8 0,05 16 10050,+1,8 0,05Installation tests (see 5.5.1 and 5.5.2)11 30005,+3,5 0,05 15 70005,+3,5 0,05Ozone resistance(see 5.7)11 30005,+3,5 0,0

25、5 15 70005,+3,5 0,05Burst or unseating (see 5.6) flexing resistance (see 5.8)11 70050,+1,8 0,05 16 10050,+1,8 0,054.3 InstallationAll valves, while wet with clean water as a lubricant, shall be installed in a proper test fixture by applying valve insertion force to the end of the valve metal insert

26、or by applying valve traction force to the mouth of the valve perpendicular to the plane of the valve mounting hole and directly through the centre of the valve mounting hole. However, no valve assembly, which has damage resulting from installation, shall be tested.A valve shall be considered proper

27、ly seated when all of the indicator ring is observed to be through the rim or valve mounting hole fixture.After installation, valve assemblies shall be thoroughly dried in the sealing area before continuing tests.4.4 Limit case for valves4.4.1 Unused valves are those that have completed final manufa

28、cturing processing at least 24 h previously, have not been subjected to any test or service, and have been stored for no longer than 4 months in the dark at ambient temperature, in an optimal and non-aggressive environment. Rubber compounds can change characteristics during their life expectancy.4.4

29、.2 For the purpose of this testing method, aged valves are those unused valves that have been subjected to 100 C 3 C for 4 h in circulating hot air and cooled at 20 C to 26 C for a minimum of 4 h.5 Test methods and performances requirements5.1 Adhesion5.1.1 Test methods Make two axial, parallel cuts

30、 180 apart through the full thickness of the rubber cover down the entire length of the valve. Pull each side of the button base away from the insert towards the cap thread end at 150 mm 15 mm per min with a traction machine.The test shall be conducted at 23 C 5 C.An alternative to the traction mach

31、ine is to use pliers.2 ISO 2014 All rights reservedBS ISO 14960-1:2014ISO 14960-1:2014(E)5.1.2 PerformancesAny separation between brass and rubber, brass and cement, or cement and rubber in excess of 41 mm2, on each valve, shall be considered as a failure.Any separation that made a strip along the c

32、omplete valve axis direction shall be considered as a failure.5.2 Valve core sealValve cores installed in snap-in valve assemblies (see Figure 1) have the following characteristics: pin height tolerance: -090025,+(reference to valve mouth); standard torque: 0,40 N m to 0,50 N m with metallic sealing

33、; 0,23 N m to 0,34 N m for non-metallic gasket.5.2.1 Room temperature test5.2.1.1 Test methodsImmerse valve assembly in clean water at 23 C 5 C with mouth down vertically and not more than 100 mm below the surface of the water (see Figure 1).Check for leakage with test pressures as follows:a) cup ga

34、sket seal apply 35 kPa air pressure;b) barrel seal apply 475 kPa air pressure.5.2.1.2 PerformancesLeakage at a rate less than 0,2 cm3/min or no bubble detaching during the test time of 1 min is considered acceptable.5.2.2 Low temperature test5.2.2.1 Test methodsa) Depress and release valve core pin

35、once after a 24 h minimum exposure at 40 C 3 C, and assembly pressure shall be maintained to 180 kPa 15 kPa (see following Figure 1).b) Check for leakage with 40 C 3 C ethanol or methanol 25 mm above valve mouth, with assembly still pressurized to 180 kPa.c) Begin leak detection after 1 min soak per

36、iod.5.2.2.2 PerformancesLeakage at a rate less than 0,2 cm3/min or no bubble detaching during the test time of 1 min is considered acceptable. ISO 2014 All rights reserved 3BS ISO 14960-1:2014ISO 14960-1:2014(E)5.2.3 High temperature test5.2.3.1 Test methods(See Figure 1.)a) Depress and release valv

37、e core pin once after a 48 h minimum soak period at 100 C 3 C, and assembly pressure shall be maintained to 600 kPa 15 kPa.b) Check for leakage with 66 C 3 C clean water not more than 50 mm above the mouth of the valve with assembly still pressurized to 600 kPa.5.2.3.2 PerformancesLeakage at a rate

38、less than 0,2 cm3/min or no bubble detaching during the test time of 1 min is considered acceptable.5.3 Valve cap seal (optional, for sealing caps only)5.3.1 Room temperature test with cap5.3.1.1 Test methodsa) Screw the cap with sealing gasket at 0,15 N m to 0,20 N m torque on valve without core.b)

39、 Immerse valve assembly in clean water at 23 C 5 C with mouth down vertically and not more than 100 mm below the surface of the water (see Figure 1).c) Check for leakage with 475 kPa test pressure.5.3.1.2 PerformancesLeakage at a rate less than 0,2 cm3/min or no bubble detaching during the test time

40、 of 1 min is considered acceptable.4 ISO 2014 All rights reservedBS ISO 14960-1:2014ISO 14960-1:2014(E)Key1 air supply2 regulator3 gauge4 liquid level (100 mm max)Figure 1 Valve seal test description5.4 Valve to rim sealTemperature tests are performed to subject the valves to extremes in temperature

41、. Flexing of valves simulates possible operational conditions.The same valves and assemblies as shown may be used for both tests provided that the low temperature test is conducted first (see Figure 2).5.4.1 Low temperature5.4.1.1 Test holes 11,7 0/-0,05, 1,8 0,05thick; 16,1 0/-0,05, 1,8 0,05thick.5

42、.4.1.2 Test methodsa) Test valves shall be mounted in a test plate as per 4.2 and 4.3.b) Assembly shall then be exposed to a temperature of -40 C 3 C for a minimum of 24 h to ensure that the valve seal area is at the test temperature, and pressure shall be maintained to 180 kPa 15 kPa.c) The valve a

43、ssembly, still pressurized to 180 kPa 15 kPa, shall then be immersed, valve mouth up, in ethanol or methanol at -40 C 3 C, valve button not more than 100 mm below the surface of the liquid.d) With respect to the axis of the valve mounting hole, the immersed valve shall be flexed to an angle of 25 3.

44、 The cap end of the valve shall then be revolved one complete turn around the axis of the mounting hole. This single revolution shall be executed at a uniform rate without the application of torque to the valve body and accomplished within 15 s to 45 s. ISO 2014 All rights reserved 5BS ISO 14960-1:2

45、014ISO 14960-1:2014(E)e) The assembly shall be returned in the refrigerator at -40 C 3 C after each test, and pressure shall be maintained to 180 kPa 15 kPa.f) Repeat points c) to e) at 0,5 h minimum interval period for a total of five times.5.4.1.3 PerformancesLeakage at a rate less than 0,2 cm3/mi

46、n or no bubble detaching during the test time of 1 min is considered acceptable at the rim seal before, during, or after revolving and flexing the valve.Air inclusions during installation are not considered.5.4.2 High Temperature5.4.2.1 Test holes 11,7 0/-0,05, 1,8 0,05thick; 16,1 0/-0,05, 1,8 0,05t

47、hick.5.4.2.2 Test methodsa) Test valve shall be mounted in a test plate as per 4.2 and 4.3.b) The test assembly shall then be exposed to a temperature of 100 C 3 C for 48 h in a hot air circulating oven to simulate ageing, and pressure shall be maintained to 600 kPa 15 kPa.c) The assembly still pres

48、surized is immersed, valve mouth up, in clean water at 66 C 3 C, valve button not more than 100 mm below the surface of the liquid.d) With respect to the axis of the valve mounting hole, the immersed valve shall be flexed to an angle of 25 3. The cap end of the valve shall then be revolved one compl

49、ete turn around the axis of the mounting hole. This single revolution shall be executed at a uniform rate without the application of torque to the valve body and accomplished within 15 s to 45 s. Water temperature shall be maintained at 66 C 3 C during the whole test.e) The assembly shall be returned to the hot air oven and pressure shall be maintained to 600 kPa 15 kPa.f) Repeat