Fireproof Butterfly Dampers CR120+MFUS
Circular fire dampers with a fire resistance duration of 120 minutes. When the temperature in the damper rises above 72 °C, the fusible link breaks and the damper closes via a spring. When closed, the expanding material around the fireblade swells and assures a fire and air-tight seal against hot air and smoke.
The CR120 + MFUS fire dampers have a manual operating mechanism with indication of the blade's position. Optionally, an end and begin of range switch FDCU MFUS can be added to the mechanism. The operating mechanism can be removed easily, for inspection purposes or for replacing the fusible link.
The tunnel is made out of galvanized steel.