This standard specifies the type, structural type and main dimensions of the tire valve core cavity. This standard applies to tire valve core cavities using valve cores specified in GB 1795 and GB 12838. GB 9764-1997 Tire valve core cavity GB9764-1997 standard download and decompression password: www.bzxz.net

GB9764-1997 | ” and TRA Yearbook (1994).
The main structural dimensions of No. 1A and No. 2 core cavities in this standard are equivalent to international standards. The main structural dimensions of No. 1B core cavity are equivalent to those in the TRA yearbook.
Based on the previous version, this standard has revised the core cavity graphics and main structural dimensions, and deleted the chapter "Assembly of the valve core cavity and valve core".
This standard will replace GB9764-88 from the effective date. This standard is proposed by the Ministry of Chemical Industry of the People's Republic of China. This standard is under the jurisdiction of the National Tire and Rim Standardization Technical Committee. This standard was drafted by: Shandong Valve Factory. The main drafters of this standard: Cui Jie, Feng Lin. This standard was first published in May 1988.
This standard is entrusted to the National Valve Standardization Sub-Technical Committee for interpretation, 231
Scope
National Standard of the People's Republic of China
Tire valve core cavity
Tire valves-Core chambers
This standard specifies the type, structure and main dimensions of tire valve core chambers. GB 9764
1997
neq Iso 6762: 1982
ISO 7442:1982
replaces GB9764—88
Specifies the tire valve core cavity of the valve core. Referenced standards
2
The provisions contained in the following standards constitute provisions of this standard by being quoted in this standard. At the time of publication, the editions indicated were valid. All standards are subject to revision and parties using this standard should explore the possibility of using the latest version of the standard listed below. GB1795-1996 tire valve core
GB9765-1997 tire valve thread
GB12838--91 large core cavity tire valve core
3 types
tire valve core cavity It is divided into two categories: No. 1 and No. 2. The No. 1 core cavity is divided into two types: No. 1A and No. 1B. 4 Structural type and main dimensions
4.1 The structural type and main dimensions of the core cavity are shown in Figures 1 to 3. loose
note
f.
08
88
30. 5t8.5
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14|| tt||好游
HAS
7.8*9.8
10
The expansion $5.4×2.5 can be omitted, and the core cavity thread can be processed directly to the mouth 2 thread The length is determined using a through-end thread plug gauge. This dimension is based on the gauge end face and includes a 0.5 pitch chamfer. Figure 11A core cavity
State Bureau of Technical Supervision approved 232
2.5
*S
1998-04-01 implemented on 1998-04-01
Note

GB 9764-- 1997
1 expansion $5.4×2.5 can be omitted, and the core cavity thread can be processed directly to the mouth. he
22.7min
2$2.5 is the minimum hole diameter, which can be processed to the same size as hole 4.3, as shown by the double-dot dash line in the figure. S
7.8*g.8
10+.
3 The length of the thread is determined by the through-end thread plug gauge. This dimension is based on the gauge end face and includes a 0.5 pitch chamfer. Figure 2 Core cavity No. 1B
湖
179
2 *99
31
34. 3+0.8
游1A8| |tt||11. 5 g.8
13. 8+8.12
18
Note: The length of the thread is determined by the through-end thread plug gauge. This dimension is based on the gauge end face and includes a 0.5 pitch chamfer. Figure 32 Core Cavity
4.2 The threads in the core cavity should comply with the requirements of GB9765. 2.5
Ce
233
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