Series 97fb - fsfe ( flanged ) and 97gb - fsge ( grooved ) ul / fm fire service strainers are used in conjunction with a water spray system to protect the system against clogging that can be caused by particles fouling the small discharge opening of the sprinkler heads 系列97fb - fsfe （法兰）和97gb - fsge （沟槽） ul / fm消防应用过滤器用于与水喷淋系统一起保护系统不会由于颗粒积垢在喷淋头排泄口而导致系统堵塞。
When the alarm detects that the concentration of the gas reaches or excesses the preset alarming scale , the alarm will give out sound and light alarm immediately to warn the users to take measures for safety , start the exhaust and the spray systems , and cut off the gas flow for preventing explosion , fire disaster and poisoning to guarantee the safety of production 当环境中探测气体浓度达成或超过预置报警值时，报警器立即发出声光报警，以提醒用户采取安全措施，并驱动排风、喷淋系统、切断，切断气流防止发生爆炸、火灾、中毒事件，从而保障安全生产。
