BS 7461:1991

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BSI

Specification for electrically operated automatic gas shut-off valves fitted with throughput adjusters, proof of closure switches, closed position indicator switches or gas flow control|Mechanical testing, Valves, Automatic, Performance testing, Adjusting devices, Leak tests, Electrically-operated devices, Position switches, Adjustment, Gas valves, Flow rates, Life (durability), Control devices, Valve components, Endurance testing

112 GBP