Bsi bs au 050 3 7 1985 (2001)

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[.]

Incor por a ting

A mend ment No.1

U C 6 9.1 3.0 2.5 1–3 6.2

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2 Fe ruary1 8

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The folowing BSI r eferences

relate to th e work on this

stand ard:

Commi e reference A E/4

Draft for comment 8 / 71 5 DC

Th e prep ration of this BritishStand rd was entrusted b the Automobi e

Stand rds Commit e ( AUE/—) to Tech ical Commit e AUE/4 upon which

the folowing bodies were represented:

Ag ricultural Eng ine r ’ Association

British Industrial Truck As ociation

British Pres ure Gauge Man facturer ’ A ssociation

British Rub er Man facturer ’ A ssociation

Bus and Coach Cou ci

Dep rtment of Transport

London Transport Executiv e

Ministry of Defence

Motor Cy cle Association of Great Britain

Motor Industry Resear h Association

Retread Manufacturer ’ A ssociation

R oa Haula e Association Ltd

Society of Motor Manufacturer and Trad er L imited

A mendm ents is ued sinc publ cation

Amd No Date of is ue Comments

1 0 4 Ju e 20 1 In dicated b a sidel ne

Pag e

7.7 Check lst for care of inflation v alv es for p s eng er

This section of BSAU5 -3 has be n prep red un der the direction of the

Automobie Stand rds Commit e This cod e of practice giv es guid nce to v ehicle

man facturer on the initial steps to be taken in selecting v lves for p s enger

car whe ls ( including carav ans an l ght traier )

Recommend tions are also giv en on the care of v alves, which if folowed would

lea to improv ed r oa safety

The d ta in this code of practice are b sed on the information provided b the

Society of Motor Manufacturer and Tra er Ltd

Ty re, whe l, r im and v alv e requirements are given in the folowing p r ts and

sections of BSAU5 : Tyr es a nd whe ls:

— Pa r t1: Tyr es;

— Se ton0: Gener a l;

— Se ton1: Car tyr es;

— Se ton2: Commer cia l vehicle tyr es;

— Se ton3: O ff-the-r oa d tyr es;

— Se ton4: A gr iculur a l vehicle tyr es;

— Se ton5: Ind ustr ia l vehic le tyr es;

— Se ton6: Moto cycle a nd s o ter tyr es;

— Pa r t2: Whe ls a nd r ims;

— Se ton0: Gener a l (includ ing ter ms and d efiniions, a nd constr uct on a nd

wor kma nship);

— Se ton1: R im pr ofie a nd dimensions (includ ing openings f r va lve ) ;

— Se ton2: Whe l na ve a nd h b c ntr es;

— Se ton3: Whe l a nd h b stud s a nd n ts, and bols

1)

;

— Secton4: Sup lementa r y d a ta fr futur e d evel opments

1)

;

— Se ton5: R oa d whe ls ma nufa ctur ed wholy o pa rty o lght a llo fr

pa ss nger ca r s;

— Se ton6: Spe ifica tion f r r oad whe ls ma nufa ctur ed whol ly o par tly o

lght allo fr moped s a nd moto cycl es;

— Se ton7: Cod e o pr actc f r the s le ton a nd car e o whe ls fr commer cial

vehicle ;

— Se ton8: Cod e o pr act c fr the s le t on a nd ca r e o whe ls fr pa ss nger

ca r s (includ ing ca r a va ns a nd l ight tr ailer s);

— Pa r t3: Valve ;

— Se ton1: Va lve d imensions;

— Se ton2: Tyr e va lve thr ead s5V1,5V2,6V1 a nd8V1;

— Se ton3: Tyr e va lve thr ead s9V1,10V2, 12V1 and13V1;

— Se ton4: Tyr e va lve thr ead s 8V2, 10V1, 1 V1, 13V2, 15V1, 16V1, 17V1,

17V2, 17V3, 19V1 and20V1;

— Se ton5: D imensions fr ISO cor e cha mber No.1 fr tyre infla tion va l ve ;

— Se ton6: D imensions fr ISO cor e cha mber No.2 fr tyre infla tion va l ve ;

— Se ton7: Cod e o pr act c fr the s le t on a nd ca r e o tyr e infla tion va lve

fr p s enger ca r s (includ ing ca r a va ns a nd l ight tr a iler s)

)

;

— Se ton8: Cod e o pr act c fr the s le t on a nd ca r e o tyr e infla tion va l ve

fr commer cia l vehicle

1)

A British Stand rd do s not purport to include al the neces ary provisions of a

contract User of British Stand rds are responsible for their cor ect a plcation

Com pl anc with a British Standard does not of itself confer im m unity

f om leg al o l g ations

Summ ary ofpages

Th is document comprises a f ont cov er, an inside font cov er, p g esi toiv ,

p g es1 to3 and a b ck cov er

Th e BSI cop rig ht notice d isplay ed in this document indicates when the

document was last is ued

Sidel ning in this document ind icates the most recent chan ges b amen dment

b

7.1 Scope

This section of BSA U5 -3 g iv es recommend tions for v ehicle manufacturer on the initial steps to be

taken in selecting v alv es for p s eng er car whe ls ( includ ing carav ans and l g ht tr aier ) and

recommend tions on the care of v alv es for the user

7.2 Valve selection by vehicle ma nufa ctur r

When selecting a v alv e for a whe l and tyre as embly it is important to ensure that the cor ect choice is

mad e

Basic factor which in fluence this choice are:

a) ty e of ty re ( tube ty pe or tubeles );

b) inflation pres ur e of the ty re;

c) ty pe of whe l;

d ) v eh icle ma imum spe d

The b sic choice is betwe n tube ty pe and tubeles tyres This would g eneral y be decid ed b the v ehicle

design an d per orman ce req uiremen ts and the v lve ty pe is therefore pred etermined

7.3 Types ofvalves

7.3.1 General

Valves are a aia le in the fol owing two b sic ty es:

a) tubeles ty pe v alves, which can be either of the rub er sna - n or metal clamp- n ty pes (se 7.3.2);

b) tube ty pe v lves ( se 7.3.3)

7.3.2 Tubeles v lves

7.3.2.1 R ub er sna p-in va lve Rub er sna -n v lv es ar e av aia le in sever al diferent lengths and siz s

an care should be ex er ised in selecting the cor ect siz to suit the rim hole, an d the most suita le leng th

for ease of ac es so as not to be d amag ed in serv ice

The v alv e stem is thr ea ed internaly and exter naly for fitment of the v lv e core and v alve sealng ca

respectiv ely

It is es ential that special care should be taken when fit ing rub er sn ap- n v alv es Fir t the rim hole

should be inspected to ensur e it is dimensional y cor rect to an a prov ed stand ard, is in good condition and

f e fom bur s and sharp edg es wh ich can d ma e the rub er bod of the v alve Then the rub er bod of

the v lve should be lubricated with an a prov ed lubricant for ease of fit ing and inser ted into the rim hole

using a special v alve insertion to l To ensur e that the v alve is cor rectly located, it is es ential that the

moulded fit ing lne on the rub er v alv e bod p s es completely through the rim v lve hole

NOT This ty pe of v lv e is suia le for ty re inflaton pres ures up t o a ma imum of4 5kPa( 4.7b r or6 psi)

7.3.2.2 Clamp-in va lve Metal clamp- n v lv es are av aia le in a v ariety of siz s It should alwa s be

ensured that the cor ect v alv e is fit ed for the rim hole siz an a pl cation Clamp- n v alv es for tubeles

ty res are clamped into the rim and an airtight seal is ach iev ed b means of a hex gonal n t and r ub er

g rommet During fit ing it should be ensured that the v alv e is cor ectly located relativ e to the whe l

com-ponents to ensure ease of ac es for pres ure checking and a justment

Metal clamp- n v alv es are strong ly recommend ed for use with “V” or “V R” rated tubeles a plcations

except where specific prov ision has be n ma e b the v ehicle man facturer for the use of a rub er

sna - n v alv e It is es ential that metal clamp- n v lves are used where ty re inflation pres ures

exce d4 5kPa( 4.7b r or6 psi

7.3.3 Tube va lves

These ha e rub er covered stems and are vulcaniz d to the in er tube It should alway s be ensured that

th e cor ect v alv e is used for the rim hole siz and a pl cation

7.4 Valve fit ing checks

Whatev er ty e of v alv e is fit ed it should alwa s be ensured that the v lve core has cor ectly sealed

Leaking v alve cores should be replaced It should not be at empted to cur e a leaking v lve b ex tra

tightening , as this ma d mag e the core seat

It sh ould be ensur ed that the v alv e hole in the r im is in good cond ition and is f e f om burr s which could

d mag e the v lv e and cause d eflation of the ty re

A v lv e ca of the ty pe wh ich has an a ditional air seal and which wi l protect the v alv e cor e f om d irt, dust

and wate should alwa s be fit ed

7.5 Valve a cces ibi ity

Where ac es to the v alv e for inflation or pres ure checkin g purposes is dificult, a v alve extension ma be

used

Valv e exten sions ar e at ached to the v lve ca thr ea s and ar e av aia le in d iferent leng ths and d esign s

so it is important to ensure that the exten sion chosen is cor ect for the a pl cation Valv e extensions for

p s enger car v alv es car y an internal seal ng mechanism, and inflation, deflation an ty re pres ure

checks can be car ied out without remov l of the ex tension f om the v lv e The sealng extension can ot

general y be fit ed with a v lve ca

7.6 In- service valve checks

New rub er sna -n v alv es and the rub er components of metal clamp- n v alv es should alwa s be fit ed

when fit ing new replacement tyr es

Rub er cov ered v alv es should be ex mined reg ularly for splts and cuts Damag ed v alv es sh ould be

replaced immed iately

All v lv es should be ex amined regularly for d mag ed ca th rea s and/or distorted v alv e mouth where the

ca is fit ed The internal v alv e core threa s should also be ex mined for cleanlnes I the v alv e mouth is

distorted the v alv e should be replaced

It should be ensured that the ra iused v lv e mouth wh ich contacts the ca sealng washer is smo th and

without nicks and bur rs which ma s uf and tear the ca seal

Damag ed ca threa s, internal core thread s an d v alv e mouths should be rep ired with an a propriate and

recommended rep ir to l

7.7 Check l st for ca re ofinflation va lves for pas eng er ca rs

(including carava ns and l g ht trai ers)

Th e folowing check l st should be used for care of inflation v alv es for p s eng er car (includ ing carav ans

and lght tr aier )

a) Do ensure the v alv e and v alv e fit ing is the cor ect

siz and ty pe for the whe ls and usa e, e.g it is

es ential that clamp- n v lv es are used fo inflation

pres ur es a ov e4 5kPa( 4.7b r or6 psi and are

strong ly recommend ed for use on car ca a le of v ery

high spe ds,2 0km/h( 13 mi e/h) or more, except

where specific prov ision has be n ma e b the v ehicle

man facturer for the use of a sn ap- n v alv e

Do not as ume that “ any-old” v lv e or v alv e

fit ing is suita le

b) Do reg ularly ch eck on v alv e cores for leakage

Replace d mag ed or leaking cores

Do not at empt to cure leaking v alv e cor e b

over-tig htening Damag e to core seat can

easiy result

c) Do ensure th at v alv e ca s are alway s fit ed and

replaced after remov al Seal ng ty pe v alv e ca s are

prefer ed

Do not leav e v lve ca s on the grou d w hen

serv icing They can become d mag ed or lost

d) Do ensur e that th e v alve holes in tubeles rims ar e

in go d condition and the sur ou ding ar ea fe fom

rust, pits and bur s Se k a v ice if in d oubt

Do n ot at empt to remov e pits, rust an d bur s

b g rinding or hea y fi ng The holes ma

become ir eg ular in sha e an d afect v alv e

seal ng

e) Do ensure that after fit ing a rub er cov ered

sna - n tubeles v alv e, the indicating ring arou d the

bod is ful y v isible on the outside of the rim This is

an ind ication of cor ect fitment Use an a prov ed

lubricant

Do not at empt fitment of a sna -n ty e

tubeles v alv e without the cor ect mou tin g

to l Do not use grease or dirty lubricant

f) Do ensure th at clamp- n ty e v lv es are cor ectly

positioned and securely fit ed

Do not use ex ces iv e for e to tighten clamp- n

v lv e securing nuts

g) Do ex mine regularly the v alv e’s rub er fitments

or rub er cov er for c acks or spl ts and ex amine the

metal portions of the v lv e for distortion and the

th rea s for d mag e Ensure that v alv e mouth is

rou d , smo th and with out n icks or bur s which

would hind er the seal ng q ualty of the ca I in

doubt chan ge the v alve or a propriate fitment

immed iately

Do not at empt to fi l cr acks or splts with

p int, or at empt to rep ir v alve distortions,

nor at empt clearing or cleaning of threa or

v lve mouth without the a propriate and

recommended rep ir to l

h) Do ensure that new sna - n v alv es or clamp- n

v lve r ub e fit ings are fit ed when replacing

tubeles tyres

Do not as ume that ty re v lves wi last

forever

i Do ensure that if v lv e extensions are used they are

th e cor ect ty pe and length for the a pl cation and

they are securely tightened on to the v alv e

Do not use an extension if inflation and

pres ure checking can be achiev ed without it

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