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है”ह”ह

IS/ISO 20562 (2004): Tyre Valves - ISO Core Chambers No.1,No. 2 and No.3 [TED 7: Automotive Tyres, Tubes and Rims]

IS/ISO 20562 : 2004 [Superseding IS 11542 (Part 1) : 1985 and

IS 11542 (Part 2) : 1985]

Indian Standard

TYRE VALVES — ISO CORE CHAMBERS No. 1, No. 2 AND No. 3

ICS 83.160.01

©BIS 2010

B U R E A U OF I N D I A N STANDARDS MANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARG

NEW DELHI 110002

February 2010 Price Group 4

Automotive Tyres, Tubes and Rims Sectional Committee, TED 7

NATIONAL FOREWORD

This Indian Standard which is identical with ISO 20562 : 2004 Tyre valves — ISO core chambers No. 1, No. 2 and No. 3' issued by the International Organization for Standardization (ISO) was adopted by the Bureau of Indian Standards on the recommendation of the Automotive Tyres, Tubes and Rims Sectional Committee and approval of the Transport Engineering Division Council.

This standard covers ajl the requirements given in IS 11542 (Part 1) : 1985 'Dimensions for tyre tube valve core chamber: Part 1 Core chamber No. 1 (normal bore)' and IS 11542 (Part 2): 1985 'Dimensions for tyre tube valve core chamber: Part 2 Core chamber No. 2 (large bore)' which shall be withdrawn after the publication of this standard.

The text of ISO Standard has been approved as suitable for publication as an Indian Standard without deviations. Certain conventions are, however, not identical to those used in Indian Standards. Attention is particularly drawn to the following:

a) Wherever the words 'International Standard' appear referring to this standard, they should be read as 'Indian Standard'.

b) Comma (,) has been used as a decimal marker in the International Standard while in Indian Standards, the current practice is to use a point (.) as the decimal marker.

In this adopted standard, reference appears to certain International Standards for which Indian Standards also exist. The corresponding Indian Standards which are to be substituted in their respective places are listed below along with its degree of equivalence for the editions indicated:

International Standard

ISO 4570 :2002 Tyre valve threads

Corresponding Indian Standard

IS 9449 (Parts 1 to 3) Dimensions for tyre valve threads

Degree of Equivalence

Identical

Technically Equivalent

ISO 9413 : 1998 Tyre valves — IS 10939 : 2000 Designation system Dimensions and designation for tyre tube valves for automotive

vehicles (first revision)

do

For the purpose of deciding whether a particular requirement of this standard is complied with, the final value, observed or calculated, expressing the result of a test or analysis, shall be rounded off in accordance with IS 2 :1960'Rules for rounding off numerical values [revised)'.The number of significant places retained in the rounded off value should be the same as that of the specified value in this standard.

IS01502:1996 ISO general-purpose IS 2334 : 2001 ISO general-purpose metric screw threads — Gauges and metric screw threads — Gauges and gauging gauging

IS/ISO 20562 : 2004

Indian Standard

TYRE VALVES — ISO CORE CHAMBERS No. 1, No. 2 AND No. 3

1 Scope

This International Standard specifies the interchangeability dimensions of ISO core chambers Nos. 1,2 and 3 for tyre valves. For the applicability of the core chambers, see ISO 9413.

2 Normative references

The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.

ISO 1502:1996, lSO general-purpose metric screw threads — Gauges and gauging

ISO 4570, Tyre valve threads

ISO 9413, Tyre valves — Dimensions and designation

3 ISO core chamber No. 1 — Dimensions and tolerances

ISO core chamber No. 1 (see Figure 1) can be used on ail valves, provided the valve mouth is long enough to accept long cores. The core chamber dimensions shall be in accordance with Table 1 and the tolerances of the core head pin position in accordance with Figure 2.

1

a Thread 5V1 {see ISO 4570). b The counterbore of the valve mouth is optional (for its dimensions, see Annex A).

Figure 1 — Core chamber No. 1

Table 1 — Core chamber No. 1 dimensions and angle α

Dimension in millimetres

Dimension/angle Min. | Max.

D 4,3

E 3,82 3,94

F 4,27 4,70

H — 3,2

N 10,0 10,4

pa 7,8 8,6

Q 13,5 14,5

R 22,7 25,0

S 30,5 31,0

a 16° 18°

a The length of the thread is determined by using a GO thread plug gauge (see IS01502:1996,11.3 and Figure 12). The dimension shall be measured from the end of the gauge and shall include a chamfer length of 0,5 x pitch.

2

IS/ISO 20562 : 2004

IS/ISO 20562 : 2004

Dimensions in millimetres

Key

1 valve stem

8 Low limit b High limit. c The pin head shall not be more than 0,25 mm above, or 0,90 mm below, the valve mouth after insertion of the core at a torque of

— 0,17 N-m to 0,34 N-m for a core with an efastomeric barrel gasket, or

— 0,34 N-m to 0,54 N-m for a core with a metallic sealing gasket.

Figure 2 — Core pin head position — Tolerances

3

IS/ISO 20562 : 2004

4 ISO core chamber No. 2 (large bore) — Dimensions and tolerances

ISO core chamber No. 2 (large bore) is designed principally for valves used on tyres of agricultural machines, earth-moving machines and civil aircraft.

The dimensions of the core chamber (see Figure 3) shall be in accordance with Table 2 and the tolerances of the core pin head position in accordance with Figure 4.

a Thread 8V1 (see ISO 4570).

Figure 3 — Core chamber No. 2

Table 2 — Core chamber No. 2 dimensions and angle α

Dimensions in millimetres

Dimension/angle Min. Max.

D 6,7

E 6,3 6,4

F 7.3 7,7

H 4,6 4,9

N 13,82 14,22

pa 11,5 12.3

Q 17,8 18,5

R 30,5 31,5

S 34,3 35,1

a 16° 18* a The length of the thread is determined by using a GO thread plug gauge (see IS01502:1996,11.3 and Figure 12). The dimension shall be measured from the end of the gauge and shall include a chamfer length of 0,5 x pitch.

4

IS/ISO 20562 : 2004

Dimensions in millimetres

Key

1 valve stem

a Low limit, b High limit, c The pin head shall not be more than 0,25 mm above, or 0,90 mm below, the valve mouth after insertion of the core at a torque of

— 0,34 Nm to 0,56 Nm for a core with an elastomeric barrel gasket, or — 0,60 Nm to 0,80 Nm for a core with a metallic sealing barrel gasket.

Figure 4 — Core pin head position — Tolerances

5

IS/ISO 20562 : 2004

5 ISO core chamber No. 3 — Dimensions and tolerances

ISO core chamber N° 3 (see Figure 5) is designed mainly for bent valves for which the valve mouth is too short to receive a long core; it is for use only with the TR440 series tubed valves (ISO 9413:1998/Amd 1:2001).

The dimensions of the core chamber shall be in accordance with Table 3 and the tolerances of the core pin head in accordance with Figure 2.

a Thread 8V1 (see ISO 4570).

b The valve counterbore is optional.

Figure 5 — Core chamber No. 3

Table 3 — Core chamber No. 3 dimensions and angle a

Dimensions in millimetres

Dimension/angle Min. Max.

D 4,3

E 3,82 3,34

F 4,27 4,70

G 3,82 4,70

N 10,0 10,4

Pa 7,8 8.6

Q 13,5 14,5

R 22,7 -

a 16° 18°

a The length of the thread is determined by using a GO thread plug gauge (see ISO 1502:1996,11.3 and Figure 12). The dimension shall be measured from the end of the gauge and shall include a chamfer length of 0,5 x pitch.

6

IS/ISO 20562 : 2004

Annex A (informative)

Counterbore dimensions

Dimensions and tolerances in millimetres NOTE The valve counter bore is optional.

7

GMGIPN—472 BIS/ND/09—300 Copies

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Review of Indian Standards

Amendments are issued to standards as the need arises on the basts of comments. Standards are also reviewed periodically; a standard alongwith amendments is reaffirmed when such review indicates that no changes are needed; if the review indicates that changes are needed, it is taken up for revision. Users of Indian Standards should ascertain that they are in possession of the latest amendments or edition by referring to the latest issue of 'BIS Catalogue' and 'Standards: Monthly Additions'.

This Indian Standard has been developed from Doc No.: TED 7 (621).