Some building fire projects in the reuse of these devices circumstances. Such as Chongqing Tobacco Building is an example. Automatic tobacco smoke damper Chongqing mainly office and commercial buildings, walkways long, set damper mechanical exhaust system 150, each floor is only a smoke partition. Smoke on each floor electric charge of the design of a normally closed damper, each of each exhaust port has designed an electric exhaust valve normally closed dampers, smoke exhaust fan is also the entrance to the fire design an electric smoke damper normally closed. Obviously, this design features a waste of existence, but also modules, valves, construction costs of waste. 280 fire dampers and smoke damper other nature is the same round damper, just more sensitive to temperature. 280 usually was normally open damper, smoke control center via an electrical signal sent (DC24V) fire, electric motor powered aircraft executing agency action within the damper, the valve automatically closes and close an electrical signal output. DC motor driven valve action after a reset, the valve can be manually turned off or 70 ℃ melt following action close, there is a six-speed valve to regulate air flow opening. Flue damper | damper | Rich ventilation provided by Dezhou Plumper ventilation plant. Dezhou Plumper ventilation plant (0) strong, credible, in Dezhou fan, ventilation equipment industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Plumper ventilation equipment into the brilliant and you work for a better future!