2015 Texas smoke damper latest wholesale price national launch Tel: 15066595060 in Dezhou manager specializing in: fiberglass duct exhaust fan fire dampers centrifugal wind chassis fan coil smoke dampers are mainly used in ventilation and air conditioning systems, smoke fire damper is usually installed in the fire separation of the computer room ventilation and air conditioning systems is 70 degrees Celsius damper, usually always open when the duct temperature reached 70 degrees in the flue gas is automatically shut down. Control mode automatically. Smoke damper is mainly used in mechanical exhaust system, dampers 280 degrees Celsius, usually it is normally closed when the fire broke by automatic fire alarm interlock signal automatically open smoke damper manufacturer, along with a manual actuator can be manually open, but also in the fire control center remotely turn (ie joint control, manual control, automatic control of three ways), usually installed in the exhaust port, the duct through the fire and smoke partitions separate place and smoke room duct wall at the close when the temperature of flue gas duct in 280 degrees. Damper is in the pipeline is normally open fire is a long-term open ventilation was shut down automatically smoke fire is normally closed room reaches a certain concentration of smoke will automatically turn on and then turn off automatically when 280 degrees