A fire damper is a normally closed valve, controlled by the control center.24VDirect current (DC) activation or manual activation, at280It automatically shuts off at ℃ and the reset must be done manually. Its function is: when the smoke temperature reaches280At ℃, the evacuation of people is basically completed, and smoke exhaust no longer serves a practical purpose, as the smoke now carries fire. The valves automatically close to prevent the spread of the fire. The smoke exhaust outlets of the system can also be equipped with normally closed fire-resistant smoke exhaust outlets, eliminating the need for smoke exhaust fire valves on the branch pipes. During a fire, this outlet is controlled by the control center.24VDirect current activation or manual activation; when the smoke temperature reaches280The system will automatically shut off at °C, and the reset must be done manually. A smoke exhaust fire damper should also be installed at the entrance of the smoke exhaust fan room to prevent the fire from spreading to the floor where the fan room is located.