We developed HDTD-D smoke evacuation dampers. HDTD-D is used for the controlled evacuation of smoke and toxic gases generated during fire.
HDTD-D smoke evacuation dampers, located in the fire shaft of each floor in storey buildings, are open in the section where the fire is located and closed in the other floors. Thus, the passage of smoke from the place where smoke is evacuated to other spaces is prevented. The dampers are driven by a 24 V AC / DC or 240V AC resistant damper motor, and they are closed or opened as ‘fail safe’ when the power is cut off by a spring inside the motor. Then the spring can be brought back to its former position with the return mechanism.