1.安裝在排煙系統管路上,平時一般呈關閉狀態,火災時手動或電動開啟,起排煙作用.當排煙管道內煙氣溫度達到280℃時關閉,在一定時間內能滿足耐火穩定性和耐火完整性要求,起排煙作用的閥門.

　　1. smoke extraction system installed in the pipeline, usually in a closed state, when the fire manual or electric open up smoke. When close the exhaust pipe, the flue gas temperature reached 280 degrees, in a certain period of time to meet the fire stability and fire integrity requirements, since the exhaust effect of the valve.

　　2.常閉型排煙防火閥(常閉,電訊號開啟,280度熔斷關閉,或手動關閉)一般應用于排煙系統中,可在排煙風機吸入口安裝一個,火災時由消控室控制開啟,關閉時也可連鎖關閉該排煙風機.

　　2. normally closed type smoke damper (normally closed, open telecommunications number, 280 degrees blown off, or manually shut down) is generally used in the exhaust system, the suction exhaust fan installed a fire control room control by the consumer to open, closed when the chain to close the exhaust fan.

　　3.排煙閥,各個單位叫法不同,有的根據它的動作溫度叫做排煙閥,有的根據它的用途性質叫做防火閥,但是對于設備方只是把普通防火閥的熔斷金屬換成280度熔斷的那一種.

　　3. exhaust valve, the various units of different names, some called according to its operating temperature of exhaust valve, depending on the nature of its use is called the fire valve, but only for the equipment side of the ordinary damper fuse metal into the a 280 fuse.

　　施工安裝

　　Construction installation

　　1. 防火閥可與通風機、排煙風機聯鎖.

　　1. fire dampers can be interlocked with ventilators and smoke exhaust fans

　　2. 閥門的操作機構一側應有不小于200mm 的凈空間以利檢修.

　　2., the valve side of the operating mechanism should be no less than 200mm of the net space in order to facilitate the overhaul

　　3. 安裝閥門前必須檢查閥門的操作機構是否完好,動作是否靈活有效.

　　3., before installing the valve, you must check the valve operating mechanism is intact, the action is flexible and effective

　　4. 防火閥應安裝在緊靠墻或樓板的風管管段中,防火分區隔墻兩側的防火閥距墻表面不應大于200mm,防火閥兩側各2.0m范圍內的管道及其絕熱材料應采用不燃材料.

　　4. fire safety valve should be installed in the pipe against the wall or floor wind section, fire valve fire partition walls on both sides of the distance from the wall surface should be no more than 200mm, the pipeline fire valve on both sides of the 2.0m range and the insulation material used should be made of non combustible materials.

　　5. 防火閥應單獨設支吊架,以防止發生火災時管道變形影響其性能.

　　5. fire dampers shall be provided with separate hangers to prevent pipe deformation during fire and affect its performance

　　6. 防火閥的熔斷片應裝在朝向火災危險性較大的一側.

　　6. the fuse shall be mounted on the side of the fire that is dangerous

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