This damper is installed in the pipe of ventilation system and air-conditioning system that need smoke prevention and fire prevention. At ordinary times, it is normal open, in fire situation, closed to prevent fire and smoke.
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. Close or reset manually
4. When closed, it outputs one group of active contact signal and one group of passive contact signal