BS 2456:1990
Current
The latest, up-to-date edition.
Specification for floats (plastics) for float operated valves for cold water services
Hardcopy , PDF
English
17-09-2001
Committees responsible
Foreword
Specification
Section 1. General
1.1 Scope
1.2 Definitions
1.3 Marking
1.4 Colour coding
Section 2. Materials
2.1 Effect of materials on water quality
2.2 Plastics materials
2.3 Copper alloy for boss insert
Section 3. Design and construction
3.1 Lifting efforts
3.2 Bosses
Section 4. Test requirements
4.1 Leakage and hot water test
4.2 Deflection test
4.3 Impact test
4.4 Cold embrittlement test
4.5 Boss distortion test
Appendices
A. Information to be supplied by the purchaser
B. Calculation of lifting effort
C. Method of test for leakage and determination of
resistance to hot water
D. Method of determining deflection
E. Method of determining resistance to cold embrittle-
ment
F. Method of determining resistance of the boss to
distortion
Tables
1. Minimum lifting efforts
2. Bosses
Figures
1. Deflection test rig
2. Example of test bolt
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