FDML
Fire damper
FDML - The fire damper is shut-off equipment in the ductwork of air ventilation system. The damper prevents fire and combustion gases moving from one fire compartment to another by closing the air duct at the locations of damper in the ventilation openings, in the fire partition structure.
Properties
•dimensions - from 200 x 300 to 1000 x 1000 mm
•CE certification according to EN 15650
•tested according to EN 1366-2
•classified according to EN 13501-3 + A1
•fire resistance: EI 90 S
•width of damper´s casing inside wall - 150 mm only!
•air tightness according to EN 1751, casing/body class ATC 4 and blades class 3
•corrosion resistance according to EN 15650
•cycling test C 10 000 according to EN 15650
•control of blades with electrical actuator 24V or 230V, initiated by thermal fuse
•for maximum velocity 12 m/s and pressure difference on the damper´s blades 1 500 Pa
Specifications
FDML multi blade fire dampers are in motor-driven versions with servo drives and they have the following two main applications:■ They are applied as fire closures without following air condition duct with cover grids for closure of vents in fire dividingwalls, constructions, elevator and other shafts, cable and other channels preventing spread of fire heat and other combustion products.■ If applied as multi blade fire damper with air condition connecting pipes from both ends (without grids) or with connecting pipe at one end (1x grid) they prevent spreading of heat and combustion products through such piping system.If the damper is hit with fire it will automatically (or remotely as the case may be) be closed and spread of fire from one fire sector to another will be prevented. Damper blades automatically close air flow using servo check spring. The servo check spring is put into operation at activation of thermo-electric actuator by pressing reset button or with interruption of servo feeding. Once the blades have been closed the damper is sealed using rubber seal against fume penetration. At the same time damper blade is placed in a material which increases its volume by actuating higher temperature and seals the damper hermetically. Dampers are not furnished with inspection chambers. If these dampers are used as dampers for simple maintenance and revision they must be completed with connecting inspection equipment installed just behind the damper.