Performance advantages of smoke exhaust fire dampers: 1. Low air leakage and good air tightness; 2. Electric opening consumes less current; 3. Strong anti-corrosion performance and long service life; 4. The actuator drive is flexible, and the feedback and interlocking signals are accurate. Applied in mechanical smoke exhaust systems, it is a 280 ℃ fire damper that is normally closed. When a fire occurs, it automatically opens upon receiving a fire alarm linkage signal. It also has a manual actuator that can be manually opened or remotely opened from the fire control center (i.e. linkage control, manual control, and automatic control).