防煙防火調(diào)節(jié)閥安裝在有防煙防火及需要進(jìn)行風(fēng)量調(diào)節(jié)的通風(fēng)空調(diào)系統(tǒng)的風(fēng)管上，平時(shí)常開，發(fā)生火災(zāi)時(shí)關(guān)閉。手動(dòng)復(fù)位開啟閥門。

1, The scope of application andthe principle:
Smoke and fire damper is applicable to theventilation, air-conditioning duct with flow volume control and fire preventiondemand. Usually the damper is open. when fire occured, the fuse plug promptlyclose automatically. Manually open the damper to reset the system.