BRITISH STANDARD AUTOMOBILE SERIES BS AU 50 3 7 1985 Incorporating Amendment No 1 Tyres and wheels — Part 3 Valves — Section 7 Code of practice for the selection and care of tyre inflation valves for[.]
Li cen sed Copy: Lon d on Sou th Ban k U n i versi ty, Lon d on Sou th Ban k U n i versi ty, Sat Dec 09 02: 1 : 26 G M T+00: 00 2006, U n trol l ed Copy, (c) BSI BRITISH STANDARD AUTOMOBILE SERIES BS AU 50-3.7:1 985 Incorp o rating Am endm ent No Tyres and wheels — Part 3: Valves — Section 7: Code of practice for the selection and care of tyre inflation valves for passenger cars (including caravans and light trailers) UD C 1 5 – NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW Li cen sed Copy: Lon d on Sou th Ban k U n i versi ty, Lon d on Sou th Ban k U n i versi ty, Sat Dec 09 02: 1 : 26 G M T+00: 00 2006, U n trol l ed Copy, (c) BSI BS AU 50-3.7:1 985 Committees responsible for this British Standard The preparation of this British Standard was entrusted by the Automobile Standards Committee (AUE/—) to Technical Committee AUE/4 upon which the following bodies were represented: Agricultural Engineers’ Association British Industrial Truck Association British Pressure Gauge Manufacturers’ Association British Rubber Manufacturers’ Association Bus and Coach Council Department of Transport London Transport Executive Ministry of Defence Motor Cycle Association of Great Britain Motor Industry Research Association Retread Manufacturers’ Association Road Haulage Association Ltd Society of Motor Manufacturers and Traders Limited This British Standard, having been prepared under the direction of the Automobile Standards Committee, was published under the authority of the Board of BSI and comes into effect on Amendments issued since publication 28 Feb ruary 985 © BSI 06- 2001 The following BSI references relate to the work on this standard: Committee reference AUE/4 Draft for comment 84/71 550 DC ISBN 80 432 Amd No Date of issue Comments 1 054 June 2001 Indicated by a sideline Li cen sed Copy: Lon d on Sou th Ban k U n i versi ty, Lon d on Sou th Ban k U n i versi ty, Sat Dec 09 02: 1 : 26 G M T+00: 00 2006, U n trol l ed Copy, (c) BSI BS AU 50-3.7:1 985 C ontents Page Committees responsible ii Scope Valve selection by vehicle manufacturer Types of valves Valve fitting checks Valve accessibility In- service valve checks 7 Check list for care of inflation valves for passenger cars (including caravans and light trailers) © BSI 06- 2001 Inside front cover Foreword i Li cen sed Copy: Lon d on Sou th Ban k U n i versi ty, Lon d on Sou th Ban k U n i versi ty, Sat Dec 09 02: 1 : 26 G M T+00: 00 2006, U n trol l ed Copy, (c) BSI BS AU 50-3.7:1 985 Foreword This section of BS AU 50-3 has been prepared under the direction of the Automobile Standards Committee This code of practice gives guidance to vehicle manufacturers on the initial steps to be taken in selecting valves for passenger car wheels (including caravans and light trailers) Recommendations are also given on the care of valves, which if followed would lead to improved road safety The data in this code of practice are based on the information provided by the Society of Motor Manufacturers and Traders Ltd Tyre, wheel, rim and valve requirements are given in the following parts and sections of BS AU 50: — Tyres and wheels : Part : Tyres; — Section 0: General; — Section 1: Car tyres; — Section 2: Commercial vehicle tyres; — Section 3: Off-the-road tyres; — Section 4: Agricultural vehicle tyres; — Section 5: Industrial vehicle tyres; — Section 6: Motor cycle and scooter tyres; — Part 2: Wheels and rims; Section 0: General (including terms and definitions, and construction and workmanship); — — Section 1: Rim profiles and dimensions (including openings for valves); — Section 2: Wheel naves and hub centres; — Section 3: Wheel and hub studs and nuts, and bolts ) ; — Section 4: Supplementary data for future developments ) ; Section 5: Road wheels manufactured wholly or partly of light alloy for passenger cars; — — Section 6: Specification for road wheels manufactured wholly or partly of light alloy for mopeds and motor cycles; Section 7: Code of practice for the selection and care of wheels for commercial vehicles; — — Section 8: Code of practice for the selection and care of wheels for passenger cars (including caravans and light trailers); — Part 3: Valves; — Section 1: Valve dimensions; — Section 2: Tyre valve threads 5V1 , 5V2, 6V1 and 8V1; — Section 3: Tyre valve threads 9V1 , 10V2, 2V1 and 3V1; Section 4: Tyre valve threads 8V2, 10V1, 11V1, 13V2, 15V1, 6V1, 7V1, 17V2, 17V3, 19V1 and 20V1; — — Section 5: Dimensions for ISO core chamber No for tyre inflation valves; — Section 6: Dimensions for ISO core chamber No for tyre inflation valves; Section 7: Code of practice for the selection and care of tyre inflation valves for passenger cars (including caravans and light trailers)1 ) ; — Section 8: Code of practice for the selection and care of tyre inflation valves for commercial vehicles ) — 1) ii In preparation © BSI 06- 001 Li cen sed Copy: Lon d on Sou th Ban k U n i versi ty, Lon d on Sou th Ban k U n i versi ty, Sat Dec 09 02: 1 : 26 G M T+00: 00 2006, U n trol l ed Copy, (c) BSI BS AU 50-3.7:1 985 A British S tandard does not p urp ort to include all the neces sary provis ions of a contract Us ers of British S tandards are res p ons ib le for their correct ap p lication C ompliance with a British Standard does not of itself confer immunity from legal obligations Summary of pages This document com prises a front cover, an inside front cover, p ages i to iv, p ages to and a b ack cove r The BS I copyright notice dis p layed in this document indicates when the document was last is sued S idelining in this document indicates the most recent channges b y amendment © BS I 06 - 00 iii Li cen sed Copy: Lon d on Sou th Ban k U n i versi ty, Lon d on Sou th Ban k U n i versi ty, Sat Dec 09 02: 1 : 26 G M T+00: 00 2006, U n trol l ed Copy, (c) BSI iv blank Li cen sed Copy: Lon d on Sou th Ban k U n i versi ty, Lon d on Sou th Ban k U n i versi ty, Sat Dec 09 02: 1 : 26 G M T+00: 00 2006, U n trol l ed Copy, (c) BSI BS AU 50-3.7:1 985 7.1 Scope This section of BS AU 50- gives recommendations for vehicle manufacturers on the initial steps to be taken in selecting valves for passenger car wheels (including caravans and light trailers) and recommendations on the care of valves for the user 7.2 Valve selection by vehicle manufacturer When selecting a valve for a wheel and tyre assembly it is important to ensure that the correct choice is made Basic factors which influence this choice are: a) type of tyre (tube type or tubeless) ; b) inflation pressure of the tyre; c) type of wheel; d) vehicle maximum speed The basic choice is between tube type and tubeless tyres This would generally be decided by the vehicle design and performance requirements and the valve type is therefore predetermined 7.3 Types of valves 7.3.1 General Valves are available in the following two basic types: a) tubeless type valves, which can be either of the rubber snap- in or metal clamp- in types (see 7.3.2 ); b) tube type valves (see 7.3.3 ) 7.3.2 Tubeless valves 7.3.2.1 Rub ber snap-in valves Rubber snap- in valves are available in several different lengths and sizes and care should be exercised in selecting the correct size to suit the rim hole, and the most suitable length for ease of access so as not to be damaged in service The valve stem is threaded internally and externally for fitment of the valve core and valve sealing cap respectively It is essential that special care should be taken when fitting rubber snap-in valves First the rim hole should be inspected to ensure it is dimensionally correct to an approved standard, is in good condition and free from burrs and sharp edges which can damage the rubber body of the valve Then the rubber body of the valve should be lubricated with an approved lubricant for ease of fitting and inserted into the rim hole using a special valve insertion tool To ensure that the valve is correctly located, it is essential that the moulded fitting line on the rubber valve body passes completely through the rim valve hole NOTE This type of valve is suitable for tyre inflation pressures up to a maximum of 475 kPa (4 bar or 69 psi) 7.3.2.2 Clam p-in valves Metal clamp- in valves are available in a variety of sizes It should always be ensured that the correct valve is fitted for the rim hole size and application Clamp- in valves for tubeless tyres are clamped into the rim and an airtight seal is achieved by means of a hexagonal nut and rubber grommet During fitting it should be ensured that the valve is correctly located relative to the wheel components to ensure ease of access for pressure checking and adj ustment Metal clamp- in valves are strongly recommended for use with “V” or “VR” rated tubeless applications except where specific provision has been made by the vehicle manufacturers for the use of a rubber snap- in valve It is essential that metal clamp- in valves are used where tyre inflation pressures exceed 475 kPa (4 bar or 69 psi) 7.3.3 Tube valves These have rubber covered stems and are vulcanized to the inner tube It should always be ensured that the correct valve is used for the rim hole size and application © BSI 06- 2001 Li cen sed Copy: Lon d on Sou th Ban k U n i versi ty, Lon d on Sou th Ban k U n i versi ty, Sat Dec 09 02: 1 : 26 G M T+00: 00 2006, U n trol l ed Copy, (c) BSI BS AU 50-3.7:1 985 7.4 Valve fitting checks Whatever type of valve is fitted it should always be ensured that the valve core has correctly sealed Leaking valve cores should be replaced It should not be attempted to cure a leaking valve by extra tightening, as this may damage the core seat It should be ensured that the valve hole in the rim is in good condition and is free from burrs which could damage the valve and cause deflation of the tyre A valve cap of the type which has an additional air seal and which will protect the valve core from dirt, dust and water should always be fitted 7.5 Valve accessibility Where access to the valve for inflation or pressure checking purposes is difficult, a valve extension may be used Valve extensions are attached to the valve cap threads and are available in different lengths and designs so it is important to ensure that the extension chosen is correct for the application Valve extensions for passenger car valves carry an internal sealing mechanism, and inflation, deflation and tyre pressure checks can be carried out without removal of the extension from the valve The sealing extension cannot generally be fitted with a valve cap 7.6 In-service valve checks New rubber snap- in valves and the rubber components of metal clamp-in valves should always be fitted when fitting new replacement tyres Rubber covered valves should be examined regularly for splits and cuts Damaged valves should be replaced immediately All valves should be examined regularly for damaged cap threads and/or distorted valve mouth where the cap is fitted The internal valve core threads should also be examined for cleanliness If the valve mouth is distorted the valve should be replaced It should be ensured that the radiused valve mouth which contacts the cap sealing washer is smooth and without nicks and burrs which may scuff and tear the cap seal Damaged cap threads, internal core threads and valve mouths should be repaired with an appropriate and recommended repair tool 7.7 Check list for care of inflation valves for passenger cars (including caravans and light trailers) The following check list should be used for care of inflation valves for passenger cars (including caravans and light trailers) a) Do ensure the valve and valve fitting is the correct Do not assume that “any- old” valve or valve size and type for the wheels and usage, e g it is fitting is suitable essential that clamp- in valves are used for inflation pressures above 475 kPa (4 bar or 69 psi) and are strongly recommended for use on cars capable of very high speeds, 21 km/h (1 30 mile/h) or more, except where specific provision has been made by the vehicle manufacturer for the use of a snap-in valve b) Do regularly check on valve cores for leakage Replace damaged or leaking cores Do not attempt to cure leaking valve core by over- tightening Damage to core seat can easily result c) Do ensure that valve caps are always fitted and Do not leave valve caps on the ground when replaced after removal Sealing type valve caps are servicing They can become damaged or lost preferred © BSI 06- 2001 Li cen sed Copy: Lon d on Sou th Ban k U n i versi ty, Lon d on Sou th Ban k U n i versi ty, Sat Dec 09 02: 1 : 26 G M T+00: 00 2006, U n trol l ed Copy, (c) BSI BS AU 50-3.7:1 985 d) D o ensure that the valve holes in tubeless rims are D o not attempt to remove pits, rust and b urrs in good condition and the surrounding area free from by grinding or heavy filing The holes may rust, pits and burrs Seek advice if in doubt b ecome irregular in shape and affect valve e) Do ensure that after fitting a rubb er covered D o not attempt fitment of a snap- in type sealing snap- in tubeless valve, the indicating ring around the tub eless valve without the correct mounting body is fully visib le on the outside of the rim This is tool D o not use grease or dirty lub ricant an indication of correct fitment Use an approved lub ricant f) D o ensure that clamp- in type valves are correctly D o not use excessive force to tighten clamp - in positioned and securely fitted valve securing nuts g) D o examine regularly the valve’s rub ber fitments D o not attempt to fill cracks or splits with or rub ber cover for cracks or splits and examine the p aint, or attempt to repair valve distortions, metal portions of the valve for distortion and the nor attempt clearing or cleaning of thread or threads for damage Ensure that valve mouth is valve mouth without the appropriate and round, smooth and without nicks or b urrs which recommended repair tool would hinder the sealing quality of the cap If in doub t change the valve or appropriate fitment immediately h) D o ensure that new snap- in valves or clamp- in D o not assume that tyre valves will last valve rubber fittings are fitted when replacing forever tub eless tyres i) D o ensure that if valve extensions are used they are D o not use an extension if inflation and the correct type and length for the application and p ressure checking can b e achieved without it they are securely tightened on to the valve © BSI 06- 001 Li cen sed Copy: Lon d on Sou th Ban k U n i versi ty, Lon d on Sou th Ban k U n i versi ty, Sat Dec 09 02: 1 : 26 G M T+00: 00 2006, U n trol l ed Copy, (c) BSI BS AU 0-3.7:1 985 BSI — British Standards Institution BS I is the indep endent national b ody res ponsib le for prep aring Britis h Standards It p res ents the UK view on standards in E urope and at the international level It is incorp orated b y Royal C harter Revisions Britis h S tandards are up dated b y amendment or revision Us ers of Britis h S tandards s hould make s ure that they p oss es s the latest amendments or editio ns It is the cons tant aim of B S I to improve the quality of our p roducts and s ervices We would b e grateful if anyone finding an inaccuracy or amb iguity while using this Britis h Standard would inform the S ecretary of the technical committee resp onsib le, the identity of which can b e found on the ins ide front cover Tel: 02 89 96 000 Fax: 02 899 400 BS I offers memb ers an individual up dating service called PLUS which ens ures that s ub s crib ers automatically receive the late s t editions of s tandards Buying standards O rders for all B S I, international and foreign standards p ub lications s hould b e address ed to C ustomer S ervices Tel: 996 900 Fax: 996 700 S tandards are als o availab le from the BS I web s ite at http : //www b s i- glob al com In resp onse to orders for international standards, it is BS I p olicy to s up p ly the BS I imp lementation of those that have b ee n p ub lis hed as Britis h S tandards, unless otherwise reques ted Information on standards BS I p rovides a wide range of information on national, E urop ean and international standards through its Lib rary and its Technical H elp to E xp orters S ervice Various B S I electronic information s ervices are also availab le which give details on all its p roducts and services C ontact the Information C entre Tel: 02 89 96 1 Fax: 02 899 048 S ub scrib ing memb ers of BS I are ke pt up to date with standards develop ments and receive sub stantial dis counts on the p urchas e price of standards For details of these and other b enefits contact Memb ers hip Adminis tration Tel: 02 89 96 002 Fax: 02 899 001 Further information ab out BS I is availab le on the BS I web site at http : //www b s i- glob al com C opyright C op yright sub sis ts in all BS I p ub lications BS I als o holds the cop yright, in the UK, of the p ub lications of the international s tandardization b odies E xcep t as p ermitted under the C op yright, D es igns and Patents Act 88 no extract may b e rep roduced, stored in a retrieval sys tem or trans mitted in any form or b y any means – electronic, p hotocopying, recording or otherwise – without p rior written p ermiss ion from B SI This does not p reclude the free use, in the cours e of imp lementing the s tandard, of necess ary details such as s ymb ols, and s ize, typ e or grade designations If thes e details are to b e used for any other p urp os e than implementation then the p rior written permis sion of BS I mus t b e ob tained If p ermiss ion is granted, the terms may include royalty p ayments or a licensing agreement D etails and advice can b e ob tained from the C op yright Manager BS I 89 C his wick H igh Road London W4 4AL Tel: 02 89 96 070