2.1 damper function normally open type smoke damper functions are as follows: 2.1.1 usually was always open when the fire broke smoke dampers, the rear damper control center DC24V power output, the valve automatically closes when the pipe .2.1.2 When the temperature reaches 280 ℃, fuse action, the valve automatically closes the valve closed .2.1.3 output signals, interlocking exhaust fan to stop .2.1.4 manually shut down, manually open. 400 × 200455 × 255485 × 28585316-?14200245164245180675712805195210210400 × 320455 × 375485 × 40585316-?1420024516424524078577286526326026050 × 200555 × 255585 × 28585316-?14220245164 220245200245240785772865292312320 fan damper | Taiyuan damper | Rich ventilation equipment from Dezhou rich ventilation plant. Dezhou rich ventilation plant (www.frtfsb.com) (www.frtfsb.com) strong, credible, Shandong Texas fan, ventilation equipment industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead rich ventilation equipment into the brilliant and you work for a better future!