FDMR
Fire damper
FDMR - 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 ø 100 to ø 800 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 3 acc. to EN 1751
•Corrosion resistant acc. to EN 15650
•Cycling test in class C 10 000 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. The damper blade automatically closes the air duct using a shutting spring or an actuating mechanism of back spring. The shutting spring is activated by pressing the start button or by the impulse from the thermal fuse. The back spring of the actuating mechanism is started when the thermoelectric starting mechanism BAT is activated, when the reset button on BAT is pressed or when the power supply to the actuating mechanism is stopped. After closing the blade, the damper is sealed with a silicon packing against smoke penetration. The damper can be delivered with a seal without silicone at the customer''s wish. At the same time, the damper blade is embedded in a material which enlarges its volume due to increasing temperature and hermetically seals the air duct. The dampers have one inspection hole, as the shutting device and the inspection hole can be set to the most advantageous position with respect to operation and handling of the control device by turning the damper a little in case of the spiro model of the dampers.