AM-FD

The AM-FD activation mechanism for FD fire dampers is a crucial part of the damper. Its purpose is to drive the fire damper’s blade between the open and closed positions. In case of emergency, AM-FD will close the damper blade and remain closed to fulfil the classification parameters of the fire damper. Activation mechanism types for FD dampers are interchangeable with some degree of compatibility. The AM-FD activation mechanism is suitable for FDR-3G, FDS-3G, FDS-EI90S and FDS-EI120S fire dampers. 

The manually operated activated mechanism can only be opened manually. In case of fire, the mechanism closes either after the melting of the thermal fuse or by means of remote activation through an electromagnet in the impulse connection. After it has closed, the damper blade is mechanically locked in the closed position. The actuating mechanism is activated when the temperature of the air in the duct reaches 74°C, and the damper closes within 10 seconds after the melting of the fuse.  The actuator-operated activation mechanism is fitted with a spring return actuator and can be opened by supplying power or manually with a supplied crank. The actuator-controlled mechanism is standardly equipped with an electro-thermal fuse.