1. The main control parameters for the selection damper specifications. 2. damper suitable for ventilation and air conditioning systems, in addition to public buildings, kitchen hood system with remote control damper damper, the operating temperature of 150 ℃ cylindrical fire dampers, fire dampers general ventilation and air conditioning systems operating temperature of 70 ℃. 3. The damper is suitable for pipe ventilation, air conditioning or exhaust system, the basic functions and scope of Table 1 should pay attention to the valve 4. The selection of valve function and smoke dampers, normally open or normally closed, shut down automatically open, manually shut down open, manual reset, signal output, remote control and other requirements. 2.1 damper function normally open type smoke damper functions are as follows: 2.1.1 usually was normally open state, when the fire broke damper, by the control center after DC24V power output, the valve automatically closes when the pipe temperature reaches 280 2.1.2. When ℃, fuse action, the valve automatically closes. 2.1.3 Output signal the valve is closed, interlocking exhaust fan stops. 2.1.4 manually shut down, manually open. damper supply, fire dampers, rich, rich, ventilation equipment ventilation by Dezhou plant available. Dezhou Plumper ventilation plant (www.frtfsb.com) 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!