BS 6675:1986

Foreword
Committees responsible
Specification
Section one. General
1. Scope
2. Definitions
3. Materials
4. Lubricants for sealing rings
5. Marking
Section two. Design requirements
6. Design and construction
7. Maximum working temperature and pressure
8. End connections
Section three. Workmanship
9. Castings
10. Hot pressings
11. Chromium and nickel plating
Section four. Test requirements
12. Hydraulic type test
13. Tests of sealing rings or other elastomeric type
    seals
Appendices
A. Method for the determination of the rate of flow
B. Information to be supplied by the purchaser
Tables
1. Flow rate
2. Body wall thickness
3. Maximum working temperature and pressure
Figures
1. Flow rate test apparatus
2. Details of pressure take-off tee

Three patterns of servicing valve: spherical plug, tapered plug and screw-down, of nominal sizes 10, 12, 15 and 22, suitable for working pressures and temperatures from 16 bar at up to and including 30°C to 5 bar at a maximum of 120°C. The purpose of the valve is to isolate water supplies to individual sanitary appliances so that those appliances can be maintained or serviced.

This British Standard specifies requirements for materials, design, construction, workmanship and testing of copper alloy servicing valves for water services, suitable for working pressures and temperatures from 16 bar at up to and including 30 °C to 5 bar at a maximum of 120 °C. Table 3 also gives interpolated values.

The range of nominal sizes is 10, 12, 15 and 22 relating to the nominal outside diameter of copper tube in accordance with BS 2871 : Part 1.

This British Standard applies to the following patterns of servicing valves:

1. spherical plug;
2. tapered plug;
3. screw-down.

NOTE 1. For information to be supplied by the purchaser when ordering, see appendix B.

NOTE 2. The titles of the publications referred to in this standard are listed on page 9.