FDMB
Fire damper
FDMB - The Damper in the HVAC equipment duct that prevents the spread of fire and combustion products from one fire segment to another by shutting off the airflow at the fixture points.
Properties
•Dampers from 100 × 100 mm to 1 000 × 500 mm
•CE certified acc. to EN 15650
•Tested in accordance with EN 1366-2
•Classified acc. to EN 13501-3+A1
•Fire resistance up to EI 120 S - 500 Pa
•External Casing leakage class ATC 3 Internal leakage class 2 acc. to EN 1751
•Corrosion resistant acc. to EN 15650
•Cycling test in class Cmod / C10000 - acc. to actuator type, acc. to EN 15650
•Damper actuating mechanical, or electrical
•Maximum air speed through opened damper of 12 m/s and pressure difference 1200 Pa
•Can be used in explosion-hazard environments
Specifications
Fire dampers are shutters in ducts of air-conditioning devices that prevent spreading the fire and combustion products from one fire segment to the other one by means of closing the duct in the points of fire separating constructions. Dampers blade automatically closes air duct using a shutting spring or an actuating mechanism back spring. The shutting spring is started by releasing an initiation lever. The impulse for releasing the lever can be either a manual one, a thermal one or an electromagnetic one. The back spring of the actuating mechanism is started when the thermoelectrical starting mechanism BAT is activated, when a reset button on BAT is pushed or when a power supply of the actuating mechanism is stopped. The damper is sealed with a silicon packing against smoke penetration after closing the blade. At the same time, the damper blade is bedded in a material which enlarges its capacity and air proofs the air duct. Dampers have two inspection holes.