It is composed of ZSFZ wet alarm valve, water-power alarm bell, delayer, pressure switcher, water supply pipe, water sprayer, etc.

• 系统由ZSFZ湿式报警阀、水力警铃、延迟器、压力开关、水流指示器、供水管网、闭式洒水喷头、报警控制装置和信号碟阀等部件组成。