Series SF
Rectangular and circular fire
dampers
Description
KOOLAIR rectangular fire dampers, models SCFR-PD,
SCFR-GD, SFR3K1GT and circular fire dampers, models
SCFC-PD and SCFC-GD, are approved in accordance with
the Technical Building Code according to test standard UNE
EN 1366-2 and classified according to EN 13501-3.
Fire dampers close automatically to prevent fire and smoke from
spreading through ventilation ductwork to adjacent fire
compartments.
The frame consists of a single sheet of sheet metal with an
internal recess reinforced by a slot sheet metal support that
prevents a thermal bridge.
The blade is made of a heat-resistant material with a
thickness that varies depending on the model, intumescent
joints and a perimeter seal.
Symmetrical dampers are designed to be installed in vertical or
horizontal enclosures irrespective of the direction of the airflow.
Damper closure is operated by the breaking or smelting of a
bimetallic fusible link (-TH70) when the temperature exceeds
72 ºC.
It is reset manually in all instances except when incorporating a
servomotor with return spring and a thermoelectric fusible link
calibrated at 72 ºC.
All dampers comply with requirements of the cold smoke
leakage standard (-S).
Operation
The components of the manual operating mechanism are made
of zinc plated steel and are housed in a plastic enclosure (manual
reset).
The operating mechanism acts on the blade through a reverse
pulley and does not act directly on the blade shaft, which serves
only as a pivot. The blade operating mechanism therefore has
greater solidity and reliability.
The mechanism is offset from the blade shaft, allowing access
to the unit for maintenance and testing.
The mechanism housing is evolutive, i.e. all the operating
options can be interchanged without having to send it to the
factory.
Dampers incorporating a TH-70 fusible link and/or shunt or
undervoltage release require a manual “on-site” reset device
that allows the damper to be reset (opening) after it has been
closed. Dampers with electric motors can be reset remotely by
means of an electrical supply (24V or 230V).
SCFR-PD with motor
SCFC-PD with manual operation
with fixing strips (optional)
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