It is usually installed in the pipe of exhaust system or exhaust vent or entrance of exhaust fan, has the double functions of exhaust damper and fire damper. At ordinary time, it is normal close, in fire situation, open automatically to exhaust smoke, when the exhaust airflow reaches 280°C, the temperature sensor will work to close the damper to prevent fire.
1. Temperature control: temperature sensor works to make damper closed
2. Electronic Control: Fire Service Center electrical signal, DC24V, makes the electromagnet work to close damper automatically
3. Start or reset manually