Circular fire dampers with a fire resistance of 120 minutes. When the temperature of the thermo-electric fuse in the damper rises above 72 °C the damper will close. When closed, the expanding material around the fireblade will assure a fire and air-tight seal against hot air and smoke. The tunnel is made out of galvanized steel. The CR120 + BFLT24 fire dampers have a automatic operating mechanism with actuator, with indication of the blade position. An end and begin of range switch is included within the actuator.

Ød (mm) = 315

Galvanized steel tunnel with rubber duct sealing

Fibersilicate fireproof blade

Intumescent strip

Belimo BLFT24 Actuator with thermo-electrical fuse

CONSTRUCTION

1. Refractory casing made of galvanised steel

2. Damper blade 20 mm

3. Operating mechanism

4. Rubber sealing ring

5. Intumescent strip

6. Mounting plate thermo-electric fuse

7. Positioning plate

8. Sealing ring damper blade