GB/T 9766.1-2015Test method for tyre valves—Part 1: Test method for tube clamp-in valves (English PDF)

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 1 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 9766.1-2008 Test Method for Tyre Valves - Part 1: Test Method for Clamp-in Valves. In comparison with GB/T 9766.1-2008, the main technical changes are as follows:

---The accuracy grade of the pressure gauge is modified; the grade of the pressure gauge with an indicating value of 0 kPa ~ 2,500 kPa is modified from the previous Grade 1.5 into Grade 1.6 (see Chapter 4; Chapter 4 of Version 2008);

---The assembly torque of Type H01 valve core is modified from "0.17 N·m ~ 0.34 N·m" into "0.23 N·m ~ 0.34 N·m" (see 5.1; 5.1.1 of Version 2008);

---"use a torque of 0.15 N·m ~ 0.20 N·m to lock the valve core..." is modified into "use a torque of 0.17 N·m ~ 0.20 N·m to lock the valve core..." (see 5.1; 5.1.1 of Version 2008);

---The sealing performance test of the sealing cap is deleted (see 5.1.2 of Version 2008);

---The "assembly torque of the hexagonal nut and the valve body" is modified into "assembly test of the valve body" (see 5.2; 5.2 of Version 2008).

1 Scope

This Part of GB/T 9766 specifies the terms and definitions, test equipment, instruments and apparatuses, and test procedures of the test of tube clamp-in valves (hereinafter referred to as "valves").

This Part is applicable to the valve test of inner tubes of motorcycles and rickshaws, etc.

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 1796.1 Tyre Valves - Part 1: Clamp-in Valves

GB 1796.6 Tyre Valves - Part 6: Cores

GB 1796.7 Tyre Valves - Part 7: Components

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 Special-purpose torque wrench: with an accuracy grade of 5%.

4.2 Pressure gauge: with an indicating value of 0 kPa ~ 2,500 kPa and an accuracy grade of Grade 1.6.

4.3 Stopwatch.

4.4 The valve sealing performance test device is shown in Figure 1. […]