Rectangular 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 smoke-tight seal against hot air and smoke. The thin blade is made out of fire resistant calciumsilicate and ensures a relatively high net opening in the damper.

L (mm) =  550

H (mm) =  550  

X = (H-6)/2-70

Y =  (H-6)/2-230

Steel housing 

Calciumsilicate fireproof blade 

Swelling seal around the blade 

Manual control mechanism MFUSP with fusible link 72 °C ¾ Standard equipped with duct connection flages of 20mm ¾ Please note at height 100 mm, the operating mechanism of 150 mm (see drawing)

CONSTRUCTION

1. Refractory casing made of galvanised steel 

2. Damper blade 

3. Operating mechanism with transmission

4. Sealing cold smoke

5. Intumescent strip 

6. Positioning plate 

7. Connection frame PG20