Circular fire dampers with a fire resistance of 120 minutes. When the temperature in the damper rises above 72 °C the fusible link will break and the damper will close. When closed, the expanding material around the fireblade will swell and assure a fire and air-tight seal against hot air and smoke. The tunnel is made out of galvanized steel. The CR2 + CFTH fire dampers have a manual operating mechanism with indication of the blade position.

Ød (mm) = 355

Galvanized steel tunnel 

Fireproof blade in fibersilicate

Intumescent strip around the valve

Manual control mechanism CFTH with fusible link 72 °C

CONSTRUCTION

 1. Refractory casing (made out of galvanised steel)

2. Damper blade 

3. Operating mechanism

4. Sealing cold smoke

5. Blade bumper

6. Intumesnt strip

7. Fusible link 72°C

8. Rubber sealing ring

9. Handle for deactivation

10. Allen key for arming