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Specification for float operated valves (excluding floats). -- Diaphragm type (plastics body) for cold water services
This Part of BS 1212 specifies the performance requirements, materials, certain dimensions and tolerances of diaphragm type float operated valves (plastics bodied) of nominal size ½ for cold water services only, capable of accepting interchangeable low or high pressure renewable seats for use at pressure up to and including 3 bar1) and up to and including 14 bar respectively (see 9.1) and intended for use with 114 S or 114 NS floats (plastics) conforming to BS 2456.
NOTE 1 The nominal size is that corresponding with the Class G ½ B pipe thread specified in BS 2779.
NOTE 2 The titles of the publications referred to in this standard are listed on the inside back cover.
Operational requirements.
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