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Specification for valves and unions for hot water radiators
This British Standard specifies materials, essential aspects of design, and performance requirements for manually operated copper alloy valves for connection to hot water radiators.
Two types of valve are specified on the basis of their pressure ratings: type 4 with a maximum working pressure of 4 bar1) and type 10 with a maximum working pressure of 10 bar.
The range of sizes covered is suitable for use with radiators having ½ in, ¾ in, or 1 in female threaded connections in accordance with BS 21.
End connections for connection to the valve of 8, 10, 12, 15, 22 and 28 mm copper tube, and threads for ½, ¾ and 1 in threaded iron pipe are included.
The standard also covers valves with tailpieces, including tailpieces which incorporate a draining facility or an auxiliary valve.
Specifies designation, pressure and temperature ratings, materials, design, construction and testing of manual valves.
Includes handwheel torque strength test, connections for metric copper tubes, compression type tailpiece connections, plating and draining facility.
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