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Smoke and heat extraction dampers - multi are closures in the ductwork of smoke extraction
devices. In the event of a fire, the smoke and heat removal system open the dampers in the
affected section, therefore enabling the extraction fans to remove combustion products and heat
from the endangered areas.
The damper slat is controlled by an actuator.
The damper is fire resistant and is designed for systems with automatic or manual activation.
Smoke dampers are intended for use in spaces with multiple fire compartments, which can be
connected by a smoke extraction duct tested according to EN 1366-8 or can be installed in the
construction of the fire compartment.
The dampers can be supplied with flange(s) or without flange(s), with cover grille(s).
Flanges and grilles are not installed on the damper, they are included loosen. Flanges are
required to fit the cover grilles. Grills and flanges must be installed to the dampers only after
installation of the damper into the wall.
In normal operation, the SEDM-L dampers remain closed. If necessary, in the event of a fire, the
SEDM-L dampers in the affected fire section will open completely so that the smoke can be
removed. When the smoke and heat removal dampers are activated, the dampers used for air
supply in the affected section open. The dampers used to supply air in the affected fire section
are installed at the ground. The dampers are controlled from the central control system on the
basis of signals, e.g. from smoke detectors. The use of cables with a certain fire resistance for the
supply voltage ensures that the actuator is supplied even in the event of a fire.
During ventilation, SEDM-L dampers in the smoke and heat extraction system are controlled by
a control system, it's possible to fully open, close or continuously control the flow. The SEDM-L
dampers, which are used for air supply, remain closed during ventilation.
1 SEDM-L
2 Ventilation grille or damper for smoke and heat removal from one section
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4 Smoke barrier
5 Fan for forced smoke and heat removal
6 Duct for smoke extraction from one section
7 Multi-section smoke extraction duct