1.5 mms galvanized external casing, blades from aluminium proﬁle or galvanized sheet metal, mechanism and shaft from steel, blade channels from brass parallel blades have mechanism, suitable for motor control, with 20*20 wire mesh.
Shaft Smoke Dampers are used to evacuate smoke and poisonous gases formed by ﬁre in a controlled manner. They are installed in ﬁre and smoke shafts of buildings. The blades are normally closed and open when a ﬁre occurs and ensures evacuation of smoke and poisonous gases. In multistorey buildings the shaft smoke dampers on every ﬂoor are open on the ﬂoor where the ﬁre has occurred and are closed at other ﬂoors. Thus passage of smoke to unaffected ﬂoors is prevented.
SMOKE DAMPER EFFECTIVE AREA TABLE :
- Aeff (m²): Effective area
- W (mm): Smoke evacuation damper width
- H (mm): Smoke evacuation damper height