FDC
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FDC - 1

FDC Fire Damper for Circular Ducts • Type-approved and compliant with the EN 1366-2 • Fire damper casing complying with the tightness • Design for installation in separating concrete and • Fire damper tightness meeting smoke damper masonry walls and ceilings and lightweight plasterboard walls of fire compartments with fire • Suitability for use in ducts with a maximum pressure • Readiness for installation with all wall options as • Damper closing tests performed at 15 m/s duct delivered – no additional frames needed. • Manufacture in accordance with the ISO 9001 quality system. Product models and Accessories • VTT, the Technical Research Centre of Finland, is responsible for external quality control. • Models equipped with either manual or electric • Installation in circular ducts with diameter 160 to 500 mm. • Double sealing, ensuring that the blades are tight when the fire damper is closed before and during a fire. FDC - Fire Damper for Circular Ducts 125

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FDC - 2

When the damper is installed on concrete and masonry walls or ceilings, the size of the installation A hole is D+50 mm. When the damper is installed on lightweight walls, consult the section ‘Documents / Installation Instructions’ for the size of the installation holes. The FDC fire damper casing, installation flange, and installation frame are made of galvanised steel. The closing blade is made of calcium silicate and equipped with a flexible silicone seal as well as a graphite mass seal. Product options and Accessories Actuators Manual actuator, MA (spring return) Safety mesh on one side,...

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FDC - 3

Pressure drop and sound data The FDC is a circular fire damper of fire resistance Sound power level Lw, in in each ocatve band is class EIS 30 to EIS 120, which prevents fire and computed bu adding the corresponding correction smoke from spreading in ventilation ducts. The fire factor, Kok, to the sound pressure level in the damper is equipped with either a motorised actuator selection chart according to the following equation. or manual actuation arrangement. Both actuators Lw = LpA + Kok have a visual position indicator. If the power in the motorised actuator system is switched off, the...

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FDC - 4

Installation on concrete and masonry walls Installation on lightweight plasterboard walls When the fire damper is installed on concrete When the fire damper is installed on lightweight and masonry walls and ceilings between fire plasterboard walls between fire compartments, compartments, the blade shaft is always horizontal. an opening for the fire damper must be left in the An opening is always left in the separating element plasterboard in which the installation frame (included for the fire damper, and the product subsequently is in the delivery) is first mounted. grouted into this. The...

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FDC - 5

Product code A fire damper of class EIS 30 to EIS 120 shall have Suggested specifications a double sealing solution that ensures fire-gas resistance at all temperatures when the fire damper is In motorised models, the fuse shall be activated at 72 In the manually operated system, the fuse activation temperature corresponds to the specifications (50, 65, The fuse shall be located inside the damper, and it shall be possible to replace it from the outside. The fire damper shall have means for external opening / triggering of the release and closing. The fire damper shall include a position...

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