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It is utilized as a closed-off valve on water feed lines to separate (control) in-situ zones. A butterfly valve or rising stem valve is utilized to close off or control. The position of all valves used in flame frameworks ought to be obvious and electrically traceable. Butterfly valves are of a gearbox handwheel compose. The supervisory switch of a butterfly valve is situated inside the valve and there is an on/off pointer on it.