FDML

The FDML multi-blade fire dampers are HVAC elements serving as duct closures and can be used as fire wall closures in fire dividing structures. The FDML wall fire shutters prevent the spread of fire and fumes from one fire compartment to another. The fire shutter blades are controlled by an actuator. If the damper is hit by fire, it will close automatically by means of the actuator return spring.

The FDML can be used as a fire damper in air distribution systems as well as as a fire wall closure fitted with cover grilles in fire dividing structures. In the case of use as a fire damper, the dampers must be equipped with an access part for easy maintenance and inspection. The access part is to be installed directly behind the damper.