Fire dampers
General information
06/2015 – DE/en
FK-EU
1
Functional description
The spring return actuator enables the motorised
opening and closing of the damper blade;
it can be activated by the central BMS.
In the event of a fire, the damper is triggered
thermoelectrically at 72 °C or 95 °C
(use in warm air ventilation systems).
As long as power is supplied to the actuator,
the damper blade remains open. If the supply
voltage fails, the damper closes (power off
to close). Motorised fire dampers can be used
to shut off ducts. The torque of each actuator
is sufficient to open and close the damper blade
even while the fan is running. The spring return
actuator is fitted with limit switches that can be
used for capturing the damper blade position.
Function
Construction
with spring return actuator
K 4 – 1.1 – 7
Schematic illustration of FK-EU with spring return actuator
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①
Casing
②
Damper blade
③
Travel stop for OPEN position
④
Travel stop for CLOSED position
⑤
Inspection access
⑥
Temperature sensor
⑦
Thermoelectric release mechanism
⑧
Spring return actuator BLF/BF
