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GB/T 9766 consists of six parts under the general title of "Test Method for Tyre Valves":
— Part 1: Test Method for Clamp-in Valves;
— Part 2: Rubber Base Valves Test Methods;
— Part 3: Snap-in Valves — Test Methods;
— Part 4: Test Method for Clamp-in Tubeless Valves;
— Part 5: Test Methods for Tyre Valves for Large Core Chamber;
— Part 6: Test Method for Core.
This part is Part 6 of GB/T 9766, which is corresponding to ISO 14960:2004 "Tubeless Tyres — Valves and Components — Test Methods" (English edition). This standard is not equivalent to 14960:2004. Simultaneously, makes reference to Japanese Industrial Standard JIS D 4211:1994 "Tire Valve Cores for Automobiles".
This part supersedes GB/T 9767-2002 "Test Method for Tyre Valve Core".
Compared with GB/T 9767-2002, the main changes in this part are as follows:
— "Terms and Definitions" was added (Chapter 3 in this edition);
— Pressure for tightness test of valve core types H01 and H02 at room temperature was modified (6.1.1 in this edition);
— Observing time of tightness test was modified (5.1 in the previous edition, Chapter 6 in this edition);
— Series specifications for test of valve core products were added (6.2 and 6.3 in this edition);
— Test method for valve core type H04C was added (6.3 in this edition);
— Measurement for core cap location of valve core types H01 and H02 was added (Chapter 9 in this edition);
— Shedding test for core sealing rings of valve core types H01 and H02 was added (Chapter 10 in this edition).
This part was proposed by China Petroleum and Chemical Industry Association.
This part is under the jurisdiction of National Technical Committee 19 on Tyres and Rims of Standardization Administration of China (SAC/TC 19).
Chief drafting organizations of this part: Gongzhuling Zhongda Co., Ltd. and Jiangyin Premier Autoparts Industry Co., Ltd.
Participating drafting organizations of this part: Ningbo Yinzhou Qixing Electromechanical Co., Ltd., Jiangyin GangCheng Auto-Parts Co., Ltd., National Quality Supervision and Inspection Center of Rubber Machinery and Jiangyin Chenghua Tire Valve Factory.
Chief drafting staff of this part: Han Farui, Tang Jianlan, Zhang Haobo, Zhao Guoping, Meng Yi and Yin Zhengyuan.
The previous editions of the standard superseded by this part are as follows:
— GB 9767-1988, GB/T 9767-1994, GB/T 9767-2002.
Test Method for Tyre Valve —
Part 6: Test Method for Core
1 Scope
This part of GB/T 9766 specifies terms and definitions, test set-up, installation, tightness test, opening pressure test, core cap and core adhesion force test, core cap location measurement and core sealing ring shedding test for the test of tyre valve cores (hereinafter referred to as "valve cores").
This part is applicable to the tests of valve cores used for tyre valves of passenger cars, motor trucks, industrial vehicles, construction machinery, tractors, agricultural and forestry machinery, motorcycles, electromobiles and cycles.
This part is inapplicable to the tests of valve cores for aircraft tires.
2 Normative References
The following normative documents contain provisions which, through reference in this text, constitute provisions of this part of GB 9766. For dated references, subsequent amendments to, or revisions of, any of these publications do not apply. However, parties to agreements based on this part are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document referred to applies.
GB 9764 Tyre valves — Core chambers (GB 9764-1997, neq ISO 6762:1982; ISO 7442:1982)
GB 1796.6 Tyre Valves — Part 6: Cores (GB 1796.6-2008, ISO 9413:1998, Tyre valve — Dimensions and designation, NEQ)
GB/T 12839 Tyre valves — Terms and definitions (GB/T 12839-2005, ISO 3877-2:1997, Tyres, valves and tubes — List of equivalent terms — Part 2: Tyre valves, NEQ)
3 Terms and Definitions
For the purpose of this part of GB/T 9766, the terms and definitions given in GB/T 12839 apply.
4 Test set-up
4.1 Low temperature testing chamber: temperature within the chamber can reach -40℃ below, temperature fluctuation is ±2℃.
4.2 High temperature test chamber: temperature within the chamber can reach 200℃ above, temperature fluctuation is ±2℃.
4.3 Tension tester: loading 0 to 2000 N, relative variation of indicating value is 1%.
4.4 Manometer: indicating value is 0 to 2500 kPa, accuracy grade is Grade 1.5.
4.5 Stopwatch.
4.6 Special torque spanner: accuracy grade is 5%.
4.7 Pressure regulating valve: 0 to 2500 kPa.
4.8 Valve cores tightness test apparatus (see Figure 1).
4.9 Valve core types H01 and H02 opening pressure test apparatus (see Figure 2).
1 — Shut-off valve;
2 — Pressure regulating valve;
3 — Manometer;
4 — Hose connector;
5 — High pressure hose;
6 — The mouth of valve;
7 — Air-charging device;
8 — Liquid tank;
9 — Valve core.
Figure 1 Schematic Diagram of Valve Core Tightness test Apparatus
ICS 83.160.01 G 41 中华人民共和国国家标准 GB/T 9766.6—2008 代替GB/T 9767—2002 轮胎气门嘴试验方法 第6部分：气门芯试验方法 Test method for tyre Valve—Part 6：Test method for core (ISO 14960：2004，Tubeless tyres—Valves and components— Test methods，NEQ) 2008—09—18发布 2009—09—01实施 中华人民共和国国家质量监督检验检疫总局 中国国家标准化管理委员会 发布 前言 GB/T 9766《轮胎气门嘴试验方法》分为六个部分： ——第1部分：压紧式内胎气门嘴试验方法； ——第2部分：胶座气门嘴试验方法； ——第3部分：卡扣式气门嘴试验方法； ——第4部分：压紧式无内胎气门嘴试验方法； ——第5部分；大芯腔气门嘴试验方法； ——第6部分：气门芯试验方法。 本部分为GB/T 9766的第6部分，对应于ISO 14960：2004《无内胎气门嘴及其零部件的试验方法》(英文版)。本部分与ISO 14960：2004一致性程度为非等效。同时参考了日本工业标准JIS D 4211：1994《汽车轮胎气门芯》。 本部分代替GB/T 9767—2002《轮胎气门芯试验方法》。 本部分与GB/T 9767—2002相比，主要变化如下： ——增加了“术语和定义”(本版的第3章)； ——修改了H01型和H02型气门芯的室温密封性试验的压力(本版的6.1.1)； ——修改了密封试验观察时间(前版的5.1，本版的第6章)； ——增加了试验气门芯产品的系列规格(本版的6.2，6.3)； ——增加了H04C型气门芯试验方法(本版的6.3)； ——增加了H01型、H02型气门芯的芯杆头位置的测量(本版的第9章)； ——增加了H01型、H02型气门芯的芯体密封圈脱落的试验(本版的第10章)。 本部分由中国石油和化学工业协会提出。 本部分由全国轮胎轮辋标准化技术委员会(SAC/TC 19)归口。 本部分主要起草单位：公主岭中大股份有限公司、江阴博尔汽配工业有限公司。 本部分参加起草单位：宁渡市鄞州曙光机电有限公司、江阴市港澄汽配有限公司、国家橡胶机械质量监督检验中心、江阴市澄华轮胎气门咀厂。 本部分主要起草人：韩发瑞、唐建兰、张浩波、赵国平、蒙义、殷正元。 本部分代替标准的历次版本发布情况为： ——GB 9767—1988、GB/T 9767—1994、GB/T 9767—2002。 轮胎气门嘴试验方法 第6部分：气门芯试验方法 1 范围 GB/T 9766的本部分规定了轮胎气门芯(以下简称气门芯)试验的术语和定义、试验设备和仪器仪表、安装、密封性试验、开启压力试验、芯帽与芯体结合强力试验、芯杆头位置测量、芯体密封圈脱落试验。 本部分适用于乘用车、载重汽车、工业车辆、工程机械、拖拉机、农业和林业机械、摩托车、电动车及力车轮胎气门嘴用气门芯试验。 本部分不适用于航空轮胎用气门芯试验。 2规范性引用文件 下列文件中的条款通过GB/T 9766的本部分的引用而成为本部分的条款。凡是注日期的引用文件，其随后所有的修改单(不包括勘误的内容)或修订版均不适用于本部分，然而，鼓励根据本部分达成协议的各方研究是否可使用这些文件的最新版本。凡是不注日期的引用文件，其最新版本适用于本部分。 GB 9764轮胎气门嘴芯腔(GB 9764—1997，neq ISO 6762：1982；ISO 7442：1982) GB 1796.6轮胎气门嘴 第6部分：气门芯(GB 1796.6—2008，ISO 9413：1998，Tyre valve—Dimensions and designation，NEQ) GB/T 12839轮胎气门嘴术语及其定义(GB/T 12839—2005，ISO 3877-2：1997，Tyres，valves and tubes—List of equivalent terms—Part 2：Tyre valves，NEQ) 3术语和定义 GB/T 12839中确定的术语及其定义适用于GB/T 9766的本部分。 4试验设备和仪器仪表 4.1低温试验箱：箱内温度可达-40℃以下，温度波动为±2℃。 4.2高温试验箱：箱内温度可达200℃以上，温度波动为±2℃。 4.3拉力试验机：负荷0～2 000 N，示值相对变动值为1％。 4.4压力表：示值为0～2 500 kPa，精度等级为1.5级。 4.5秒表。 4.6专用扭矩扳手：精度等级为5％。 4.7调压阀：0～2 500 kPa。 4.8气门芯密封性试验装置(见图1)。 4.9 H01型和H02型气门芯开启压力试验装置(见图2)。
