... ,water motor gong,short pipes,ball valves, retarding chamber,etc Wet Alarm Valve Wet automatic water spraying system is one of most widely used ... & alarming and automatic fire extinguishing. It is composed of ZSFZ wet alarm valve, water motor gong, retarder, pressure switch, water flow indicator, water ... )ZSFZ1001001.22201808×φ17.535980×310×450ZSFZ1501501.22802408×φ22451030×340×480 Wet alarm valve