Butterfly Valve 3 : A type of valve that uses a flat plate to control the flow of water. Butterfly valves are used on fire apparatus and typically are used on larger lines, such as front and rear suctions and tank to pump lines
Pacific Northwest Chapter of The Society for the Preservation and Appreciation of Antique Motorized Fire Apparatus in America SPAAMFAA, Fire Apparatus Terminology, La Center, Washington, USA 2002. (Fr Srvc - Amer) {455}