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防火風口技術參數安裝(zhuang)在(zai)有防火要(yao)求(qiu)的(de)外墻通風口處(chu)(chu).有兩部份組成:電(dian)動(dong)(dong)(dong)防火閥(fa)加鋁合金固定回風口. 主要(yao)功能、特(te)點(dian): (1)閥(fa)門(men)(men)平時處(chu)(chu)于常開或常閉(bi)狀態(tai),當氣流溫度(du)達到70℃或280℃時,溫感器(qi)動(dong)(dong)(dong)作,閥(fa)門(men)(men)關閉(bi)或開啟; (2)也可通過(guo)DC24V電(dian)源使閥(fa)門(men)(men)關閉(bi)或開啟; (3)手動(dong)(dong)(dong)關閉(bi)或手動(dong)(dong)(dong)復(fu)(fu)位(wei); (4) 也可通過(guo)DV24V電(dian)動(dong)(dong)(dong)復(fu)(fu)位(wei),免去手動(dong)(dong)(dong)復(fu)(fu)位(wei)的(de)麻煩(全(quan)自動(dong)(dong)(dong)機構(gou)型(xing)) (