静压箱、排烟防火阀、止回阀、风阀、风口、散流器系列Smokeproof & Fireproof Damper Check Valve Air Diffuser Series
安装在风道系统中,工作原理是极易熔合金的温度控制，利用重力作用和执行机构的作用关闭或开启阀门,在一定时间内能满足

耐火稳定性和耐火完整性要求,起排烟或防火作用。
Installed in the ventilation or air-conditioning system, thefire-resisting damper will close or open valves to prevent fireor

smoke, under the control of easily fusible alloy or signalcontroller.