Motorized 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 CR2 + BFLT/BFNT 230 fire dampers have a motorized operating mechanism with indication of the blade position including begin or end of range switch.
Explanation
CR2 = Round fire damper 120 minutes
B(L)FT 230 = Actuator 230V with thermostatic fuse
315 = Connection diameter