Damper points and 70 degrees 70 degrees 280 degrees damper valve is automatically turned off when the temperature reaches 70 degrees, then the input module when the temperature reaches 280 degrees is 280 degrees automatically shut down, then the input and output modules fan damper, need coordinated shutdown. Vent pipe is not in use when the fire damper to close 70 degrees role play to prevent the spread of fire. Exhaust damper system is the smoke of the fire damper distribution, the higher the flue gas temperature to 280 degrees, the fire by mechanical ventilation has not achieve results, the exhaust valve is closed to prevent damage to the fans and other equipment . 70 normally open normally open fire. A fire close. 280 NC fire smoke, a fire fight began to open when the exhaust air stream 280 is closed. Fan damper, caidian damper, Wuhan Han Wei Wei Li Yuen provided by Wuhan Han Liyuan heating Equipment Co. Wuhan Han Wei Li Yuen-being of Equipment Co., Ltd. (www.whhwly.com) strong, credible, in Wuhan, Hubei fan, ventilation equipment industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Wuhan Han Wei Li Yuen and you hand into the brilliant, for a better future!