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GB/T 9766.2-2016 English PDF (GBT9766.2-2016)

GB/T 9766.2-2016 English PDF (GBT9766.2-2016)

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GB/T 9766.2-2016: Test method for tyre valves -- Part 2: Rubber base valves test methods

This Part of GB/T 9766 specifies the terms and definitions, test equipment, instruments and apparatuses of the rubber base valves (hereinafter referred to as ????valves????) test, as well as sealing performance test, adhesion strength test of rubber to metal, determination of adhesion rate and measurement of edge thickness of rubber seat. This Part is applicable to the valve test of inner tubes of industrial vehicles, agricultural vehicles, construction machinery, motorcycles, electric vehicles and rickshaws, etc. This Part is not applicable to the test of aviation tyre valves.
GB/T 9766.2-2016
GB
NATIONAL STANDARD OF THE
PEOPLE REPUBLIC OF CHINA
ICS 83.160.01
G 41
Replacing GB/T 9766.2-2008
Test Method for Tyre Valves -
Part 2: Rubber Base Valves Test Methods
ISSUED ON: FEBRUARY 24, 2016
IMPLEMENTED ON: JANUARY 1, 2017
Issued by: General Administration of Quality Supervision, Inspection and Quarantine of the PEOPLE Republic of China;
Standardization Administration of the PEOPLE Republic of China.
Table of Contents
Foreword ... 3
1 Scope ... 5
2 Normative References ... 5
3 Terms and Definitions ... 5
4 Test Equipment, Instruments and Apparatuses ... 5
5 Sealing Performance Test ... 6
6 Adhesion Strength Test of Rubber to Metal ... 7
7 Determination of Adhesion Rate ... 10
8 Measurement of Edge Thickness of Rubber Seat ... 10
Foreword
GB/T 9766 Test Method for Tyre Valves is divided into seven parts:
---Part 1: Test Method for Tube Clamp-in Valves;
---Part 2: Rubber Base Valves Test Methods;
---Part 3: Test Methods for Snap-in Valves;
---Part 4: Test Methods for Tubeless Clamp-in Valves;
---Part 5: Test Methods for Large Core Chamber Tyre Valves;
---Part 6: Test Method for Core;
---Part 7: Test Methods for Components.
This is Part 2 of GB/T 9766.
This Part was drafted in accordance with the rules provided in GB/T 1.1-2009. This Part serves as a replacement of GB/T 9766.2-2008 Test Method for Tyre Valves - Part 2: Rubber Base Valves Test Methods. In comparison with GB/T 9766.2-2008, the main technical changes are as follows:
---The accuracy grade of the pressure gauge is modified (see 4.3; 4.3 of Version 2008); ---The sealing performance test of Type AA05C ~ AA09C and Type DB04C ~ DB06C valves is added (see Chapter 5);
---The adhesion strength test of rubber to metal of Type AA05C ~ AA09C and DB04C ~ DB06C valves is added (see 6.1.2);
---Figure 5 and Figure 6 are added (see 6.2);
---The test procedures of the adhesion strength test of rubber to metal of Type CG01 ~ CG06, DG04 ~ DG09, CG08 ~ CG13, DG10 ~ DG15, CG01C ~ CG12C, DG01C ~
DG11C, EG01C ~ EG08C, CG07, DG03, DG12C, CJ06 and ZG01 valves are modified (see 6.2.1; 6.2.1 of Version 2008).
This Part was proposed by China Petroleum and Chemical Industry Federation. This Part shall be under the jurisdiction of National Technical Committee 19 on Tyres and Rims of Standardization Administration of China (SAC/TC 19).
The main drafting organizations of this Part: Jiangyin Chuangxin Valve Co., Ltd.; Xiamen Xiahui Rubber Metal Industry Co., Ltd.
The participating drafting organizations of this Part: Jiangyin Tianyi Valve Core Co., Ltd.; Shandong Gaotian Metal Manufacturing Co., Ltd.; Dongying Yutong Valve Co., Ltd.; Foshan Shunde Anchi Industrial Co., Ltd.; National Rubber Machinery Quality Supervision and Inspection Center.
The main drafters of this Part: Lu Xiaoyong, Nie Yangyang, Tang Jianlan, Li Feng, Wu Rongzhi, Li Zhangang, Mengyi.
The issuing of the previous versions:
---GB 9766-1988, GB/T 9766-1994, GB/T 9766-2002, GB/T 9766.2-2008.
Test Method for Tyre Valves - Part 2: Rubber Base Valves
Test Methods
1 Scope
This Part of GB/T 9766 specifies the terms and definitions, test equipment, instruments and apparatuses of the rubber base valves (hereinafter referred to as ?€?valves?€?) test, as well as sealing performance test, adhesion strength test of rubber to metal, determination of adhesion rate and measurement of edge thickness of rubber seat.
This Part is applicable to the valve test of inner tubes of industrial vehicles, agricultural vehicles, construction machinery, motorcycles, electric vehicles and rickshaws, etc. This Part is not applicable to the test of aviation tyre valves.
2 Normative References
The following documents are indispensable to the application of this document. In terms of references with a specified date, only versions with a specified date are applicable to this document. In terms of references without a specified date, the latest version (including all the modifications) is applicable to this document.
GB/T 1796.2 Tyre Valves - Part 2: Rubber Base Valves
GB 1796.6 Tyre Valves - Part 6: Cores
GB/T 9766.6 Test Method for Tyre Valve - Part 6: Test Method for Core
GB/T 12839 Terms and Definitions of Tyre Valves
3 Terms and Definitions
The terms and definitions defined in GB/T 12839 are applicable to this document. 4 Test Equipment, Instruments and Apparatuses
4.1 Tensile testing machine: with a load of 0 N ~ 2,000 N and the relative change of the indicating value of 1%.
4.2 High-temperature test chamber: the temperature in the chamber can reach above 200 ???C and the temperature fluctuation is ??? 2 ???C.

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