Make:hdfast application of water in spray, pre-action and foam systemsize: 50, 80, 100, 150 & 200 mm. (2", 3", 4", 6" & 8")cast iron body & cover- maximum service pressure 12 bar (175 psi)bronze clapper and seatflanged connection dimensions to ansi b 16.1no latch, no piston, no hingessimple yet ruggeddiaphragm operated with rubber to metal drip-tight positive sealingreset without any toolsservice without removal from lineeasily trimmed for actuation by manual, remote solenoid valve & with dry or wet pilotinternal and external surfaces epoxy coated for extra protectionavailable as pre-assembled cabinetskid mounted, upon request