BS 5163:1986

Foreword
Committees responsible
Specification
Section one. General
1. Scope
2. Definitions
3. Types of valves
4. Nominal sizes
5. Nominal pressures
6. Dimensions and tolerances
Section two. Design
7. General
8. Design working pressure
9. Stem sealing
10. Coatings
11. Requirements for valves for potable water
12. Number of dead turns for resilient seated valves
13. Stem
14. Stem nut
15. Stem caps
16. Operation
Section three. Materials
17. General
Section four. Testing
18. Type testing
19. Production pressure testing
20. Test certificate
Section five. Marking
21. Marking
22. Material symbols
Section six. Preparation for storage and transportation
23. General
24. Obturator position and body ends
Appendices
A. Information to be supplied by the purchaser
B. Effect of non-metallic materials on water quality
C. Designation
Tables
1. Face-to-face dimensions for grey (flake graphite)
    and spheroidal graphite cast iron gate valves PN 10,
    PN 16 and PN 25
2. Tolerances on face-to-face dimensions
3. Maximum overall heights
4. Minimum stem diameters above and below the collar
    for type B valves
5. Dimensions of stem caps and keys
6. Materials for valves
7. Type test durations
8. Test torque for T-key-operated type A valves
9. Test torque for ring key/bar-operated type B valves
    with 12 mm stem thread lead
10. Production test durations
11. Material identification symbols
Figures
1. T-key
2. Ring key and bar
3. Maximum overall heights
4. Stem caps and keys