The fully automatic smoke and fire damper is equipped with the function to联动 control with automatic fire alarm systems and gas fire suppression systems. Each fully automatic smoke and fire damper has two independent electric control signals, monitored by the EMCS and gas suppression system, with control signals being DC24V±10% signals. Each fully automatic smoke and fire damper features six independent feedback signals (three for full open, three for full close), all of which are normally open passive contact signals. The fully automatic fire damper is a high-quality fire damper produced by Dezhou Tianyu Air Conditioning Equipment Co., Ltd., offering good quality at a low price. It is installed on the ducts of ventilation and air conditioning systems with fire prevention requirements, preventing the spread of fire along the ducts. In the event of a fire, the actuator closes the door automatically upon the sensor's activation, the control center outputs a 24V power supply, or the valve is manually closed to vent smoke or prevent fire.