Strulik BEK – A fire damper with wing flaps
The business activities of Strulik GmbH are based on the four pillars of fire protection, smoke extraction, diaphragm printing systems and ventilation systems. In the following we take a closer look at fire damper Strulik BEK.
The BEK is a round fire damper in the nominal diameters DN 100, DN 125, DN 160 and DN 200. It has butterfly valves. In the open state, this ensures a low loss of cross-section through the shut-off elements and thus a high air throughput. A further positive effect of this design is the low noise level caused by the air flowing through. The flow direction is arbitrary and has no influence on the function. The dampers are classified according to EN 13501-3.
The triggering of the BEK is effected by a fusible link which melts in the event of fire at 72 °C (or 90 °C, depending on requirements). This releases the pressure path of the release spring and the damper blades close abruptly. In addition, the damper blades are locked so that an unintentional opening is not possible. This reliably prevents fire and smoke from entering the next fire compartment via the fire damper. After triggering, the damper can be reset to its original state by tensioning the spring and inserting a new fusible link. This makes it possible to check the functionality at any time. If the BEK has been triggered in the event of a fire, an expert must decide whether the damper can still be used before it is put into operation again.
The optional electrical limit switch MS-E can be used for continuous remote monitoring of the damper’s condition (open or closed) . In normal ventilation mode, one BEK is open. If one of these dampers is reported closed by the limit switch, this is always an alarm signal which indicates a damper defect or even a fire near the damper and which must be investigated immediately.
The Strulik BEK can be used universally with regard to insertion into the building. It can be installed directly in front of or in solid walls and ceilings as well as in light partition walls and shaft walls. No special fastening elements are required for this, which saves a lot of time during installation. Retrofitting into existing systems is also possible. However, it must be noted in any case that the ventilation ducts must not exert forces of more than 1 kN on the damper, especially in the event of heating in the event of a fire.
Polluted and humid air can impair the function of the fire damper in the long term. For this reason, an inspection must be carried out every six months after the ventilation system has been put into operation. If no defects are found on 2 consecutive inspections, the period can be extended to one year.