BSI - BS 7461
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
|Publication Date:||30 September 1991|
|ICS Code (Ball and plug valves):||23.060.20|
Additional requirements and test methods. Supplements BS EN 161.