Star Industrial Co., Ltd. [Jie Weinuo recommend damper manufacturers] smoke dampers are mainly used in ventilation and air conditioning system, fire dampers, smoke dampers usually installed in the fire separation of the engine room ventilation and air conditioning systems is 70 degrees Celsius dampers hfd damper, usually always open, when the flue gas duct temperature reaches 70 degrees is automatically turned off. Automatic control mode. Smoke damper is mainly used in mechanical exhaust system damper 150 is 280 degrees Celsius damper, usually is normally closed when the fire broke linked by automatic fire alarm signal is automatically turned on, along with a manual damper actuators 230v, you can manually open, but also in the fire control center remote open (ie linkage control, manual control, automatic control in three ways), usually installed in the exhaust port, the duct through the fire, smoke and smoke partitions separate room at the duct wall at the close of the flue gas duct when the temperature reaches 280 degrees. Star Industrial Co., Ltd. [Jie Weinuo recommend manual valve] manually duct material; galvanized steel, cold plate, stainless steel plates, adjust the air flow can be installed directly on the pipe size, thickness 190 hfd timely delivery valve dampers | Cai Gongzhuang Town damper | Jie Weinuo Faction provided by 捷维诺 (Tianjin) Co., Ltd. Jie Weinuo (Tianjin) Co., Ltd. (www.jieweinuo.com) strong, credible, in Tianjin fans, ventilation equipment industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Jie Weinuo Industrial and you hand into the brilliant, for a better future!