The GMK-DU smoke fire damper is a multi-blade fire damper with blades fully enclosed within the body dimensions.
It is manufactured in a rectangular casing with rigid box construction, featuring hinged rotary blades mounted on shafts.
The blades open at an angle of 90°.
GMK-DU dampers remain operational regardless of installation orientation or mounting plane.

The wall-mounted version provides minimal airflow cross-section loss.

Fire resistance: EI 120