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 24 fire dampers have a motorized operating mechanism with indication of the blade position including begin of range or end switch.
Explanation
CR2 = Round fire damper 120 Minutes
BFLT 24 = Actuator 24V with thermostatic fuse
315 = Connection diameter