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1、 Reference number ISO 14960:2004(E) ISO 2004 INTERNATIONAL STANDARD ISO 14960 First edition 2004-08-15 Tubeless tyres Valves and components Test methods Pneumatiques sans chambre Valves et composants Mthodes dessai Copyright International Organization for Standardization Provided by IHS under licens
2、e with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/21/2007 00:47:06 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 14960:2004(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobes licensing policy, this file
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5、 the file is suitable for use by ISO member bodies. In the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below. ISO 2004 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in a
6、ny form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or ISOs member body in the country of the requester. ISO copyright office Case postale 56 CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 7
7、49 09 47 E-mail copyrightiso.org Web www.iso.org Published in Switzerland ii ISO 2004 All rights reserved Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/21/2007 00:47:06 MDTNo reproduct
8、ion or networking permitted without license from IHS -,-,- ISO 14960:2004(E) ISO 2004 All rights reserved iii Contents Page Forewordiv 1 Scope1 2 Normative references .1 3 Terms and definitions.1 4 Test set-up.1 4.1 Test valve description 1 4.2 Test fixtures.2 4.3 Installation .2 5 Test methods and
9、performance requirements.2 5.1 Adhesion2 5.1.1 Test procedure 2 5.1.2 Performance requirements 3 5.2 Valve core seal 3 5.2.1 Valve core specifications.3 5.2.2 Room temperature test.3 5.2.3 Low temperature test3 5.2.4 High temperature test.4 5.3 Valve cap seal Room temperature test (optional, for sea
10、ling caps only) .4 5.3.1 Test procedure 4 5.3.2 Performance requirement 4 5.4 Valve-to-rim seal .4 5.4.1 Principal.4 5.4.2 Low temperature test4 5.4.3 High temperature test.6 5.5 Installation tests7 5.5.1 Force to seat7 5.5.2 Force to pull out7 5.6 Burst.8 5.6.1 Test hole diameter and plate thicknes
11、s8 5.6.2 Test procedure 8 5.6.3 Performance requirement 8 5.7 Ozone resistance 8 5.7.1 Test hole diameter and plate thickness8 5.7.2 Test procedure 8 5.7.3 Performance requirement 9 5.8 Flexing resistance.9 5.8.1 Test hole diameter and plate thickness9 5.8.2 Test procedure 9 5.8.3 Performance requir
12、ement 9 Bibliography .10 Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/21/2007 00:47:06 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 14960:2004(E) iv I
13、SO 2004 All rights reserved 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 intereste
14、d 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 Com
15、mission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the techni
16、cal 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. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO sh
17、all not be held responsible for identifying any or all such patent rights. ISO 14960 was prepared by Technical Committee ISO/TC 31, Tyres, rims and valves, Subcommittee SC 9, Valves for tube and tubeless tyres. Copyright International Organization for Standardization Provided by IHS under license wi
18、th ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/21/2007 00:47:06 MDTNo reproduction or networking permitted without license from IHS -,-,- INTERNATIONAL STANDARD ISO 14960:2004(E) ISO 2004 All rights reserved 1 Tubeless tyres Valves and components Test methods 1 Scope This I
19、nternational Standard specifies test methods and performance requirements for snap-in tubeless tyre valves and their components, intended for, but not limited to, highway applications. 2 Normative references The following referenced documents are indispensable for the application of this document. F
20、or dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 3911, Wheel and rims for pneumatic tyres Vocabulary, designation and marking 3 Terms and definitions For the purposes of this document, t
21、he terms and definitions given in ISO 3911 and the following apply. 3.1 snap-in valve tyre valve having a rigid housing adhered to a resilient body designed to retain and seal the valve in the rim hole 3.2 unused valve snap-in valve that has completed final manufacturing processing at least 24 h pre
22、viously, which has not been subjected to any test or service and which has been stored for no longer than 4 months in the dark at ambient temperature, in an optimal and non-aggressive environment NOTE Rubber compounds can change characteristics during their life expectancy. 3.3 aged valve unused val
23、ve that has been subjected to 100 3 C for a minimum of 4 h in circulating hot air and cooled at 20 C to 26 C for a minimum of 4 h 4 Test set-up 4.1 Test valve description A snap-in valve unit free of rubber in the air passage, having no rubber or cement above the second thread on the housing, and wi
24、thout flow cracks, blisters, voids, or other moulding defects; its mould parting line flash should not exceed 1,3 mm in height or 0,15 mm in thickness at the outer edge. Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards
25、1/9972545001 Not for Resale, 04/21/2007 00:47:06 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 14960:2004(E) 2 ISO 2004 All rights reserved 4.2 Test fixtures Break both edges on both sides of the valve hole, to form either a 45 chamfer of 0,3 mm to 0,4 mm or such that
26、 they are rounded with a radius of 0,3 mm to 0,4 mm. Emery cloth or suitable tooling should be used for this purpose. It is also recommended that the material of the test fixture be representative of the material of the actual rim. NOTE The primary external seal of a snap-in valve in a valve hole is
27、 obtained from the rubber compression of the valve body onto the internal surface of the valve hole. Secondary external sealing can be present by the contact of the remainder of the valve body exterior to the surface of the material around the valve hole. Either or both of these seals may be affecte
28、d by the compound curvatures in the wheel rims and by stock thickness. The dimensions of the test fixtures shall be in accordance with Table 1. Table 1 Test Fixtures Dimensions in millimetres Rim hole Nominal diameter 11,3 Nominal diameter 15,7 Test(s) (subclause) Test hole diameter Plate thickness
29、Test hole diameter Plate thickness Valve-to-rim seal (5.4) 0 0,05 11,7 1,8 0,05 0 0,05 16,1 1,8 0,05 Installation (5.5) 0,05 0 11,3 + 3,5 0,05 0,05 0 15,7 + 3,5 0,05 Ozone resistance (5.7) 0,05 0 11,3 + 3,5 0,05 0,05 0 15,7 + 3,5 0,05 Burst or unseating (5.6) Flexing resistance (5.8) 0 0,05 11,7 1,8
30、 0,05 0 0,05 16,1 1,8 0,05 4.3 Installation All valves, wetted with clean water as a lubricant, shall be installed in a test fixture in accordance with 4.2 by applying a valve insertion force to the end of the valve metal insert or a valve traction force to the mouth of the valve, perpendicular to t
31、he plane of the valve mounting hole and directly through the centre of the valve mounting hole. However, no valve assembly shall be tested which has damage resulting from installation. A valve shall be considered properly seated when the entire indicator ring is observed to be through the rim or val
32、ve mounting hole fixture. After installation, valve assemblies shall be thoroughly dried in the sealing area before continuing testing. 5 Test methods and performance requirements 5.1 Adhesion 5.1.1 Test procedure a) Make two axial and parallel cuts, 180 apart, through the full thickness of the rubb
33、er cover down the entire length of the valve. Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/21/2007 00:47:06 MDTNo reproduction or networking permitted without license from IHS -,-,- I
34、SO 14960:2004(E) ISO 2004 All rights reserved 3 b) Pull each side of the button base away from the insert, towards the cap thread end at (150 15) mm/min with a traction machine or manually, using pliers. The test shall be conducted at (23 5) C. 5.1.2 Performance requirements Any separation between b
35、rass 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 creating a strip along the complete valve axis direction shall be considered as a failure. 5.2 Valve core seal 5.2.1 Valve core specifications Valve cores insta
36、lled in snap-in valve assemblies (see Figure 1) shall have a pin height tolerance of 0,25 0,90 + mm, relative to the valve mouth, and a standard torque of 0,40 Nm to 0,50 Nm with metallic sealing, or 0,17 Nm to 0,34 Nm for a non-metallic gasket. 5.2.2 Room temperature test 5.2.2.1 Test procedure a)
37、Immerse the valve assembly vertically in clean water at (23 5) C not more than 100 mm below the surface of the water (see Figure 1). b) Check for leakage using the following test air pressures: for a cup gasket seal, apply a pressure of 35 kPa; for a barrel seal, apply a pressure of 475 kPa. 5.2.2.2
38、 Performance requirement Leakage shall be at a rate inferior to 0,2 cm3/min; alternatively, no bubble shall be detached during the test time of 1 min. 5.2.3 Low temperature test 5.2.3.1 Test procedure a) Depress and release the valve core pin once after a 24 h minimum exposure at ( 40 3) C; maintain
39、 assembly pressure at (180 15) kPa. See Figure 1. b) Check for leakage with ethanol or methanol at ( 40 3) C, 25 mm above the valve mouth, with the assembly still pressurised to 180 kPa. c) Begin leak detection after a 1 min soak period. Copyright International Organization for Standardization Provi
40、ded by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/21/2007 00:47:06 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 14960:2004(E) 4 ISO 2004 All rights reserved 5.2.3.2 Performance requirement Leakage shall be at a rate i
41、nferior to 0,2 cm3/min; alternatively, no bubble shall be detached during the test time of 1 min. 5.2.4 High temperature test 5.2.4.1 Test procedure a) Depress and release the valve core pin once after a 48 h minimum soak period at (100 3) C; maintain assembly pressure at (600 15) kPa. See Figure 1.
42、 b) Check for leakage with (66 3) C clean water at not more than 50 mm above the valve mouth, with the assembly still pressurised to 600 kPa. 5.2.4.2 Performance requirement Leakage shall be at a rate inferior to 0,2 cm3/min; alternatively, no bubble shall be detached during the test time of 1 min.
43、5.3 Valve cap seal Room temperature test (optional, for sealing caps only) 5.3.1 Test procedure a) Screw the cap with a sealing gasket at 0,15 Nm to 0,20 Nm torque on a valve without a core. b) Immerse the valve assembly vertically in clean water at (23 5) C not more than 100 mm below the surface of
44、 the water (see Figure 1). c) Check for leakage using a 475 kPa test pressure. 5.3.2 Performance requirement Leakage shall be at a rate inferior to 0,2 cm3/min; alternatively, no bubble shall be detached during the test time of 1 min. 5.4 Valve-to-rim seal 5.4.1 Principal Temperature tests are perfo
45、rmed to subject the test valve to extremes in temperature. The flexing of the valve simulates possible operational conditions. The same valve and assembly, as shown in Figure 2, may be used for both tests, provided the low temperature test is conducted first. 5.4.2 Low temperature test 5.4.2.1 Test
46、hole dimensions The test holes shall have the following dimensions, in millimetres: 11,7 0 0,05 in diameter and 1,8 0,05 thick; 16,1 0 0,05 in diameter and 1,8 0,05 thick. Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standard
47、s 1/9972545001 Not for Resale, 04/21/2007 00:47:06 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 14960:2004(E) ISO 2004 All rights reserved 5 Dimensions in millimetres Key 1 regulator 2 gauge a Air supply. b Liquid level. Figure 1 Valve seal test set-up 5.4.2.2 Test p
48、rocedure a) Mount the test valve on a test plate in accordance with 4.2 and 4.3. b) Expose the assembly to a temperature of ( 40 3) C for 24 h minimum to ensure the valve seal area is at the test temperature, while applying a test pressure of (180 15) kPa. c) Immerse the valve assembly, still pressurised to (180 15) kPa, with the valve mouth upwards, in ethanol or methanol at ( 40 3)