The FDA-12, FDA2-12 FDA-BU are round, rectangular and butterfly fire dampers designed for use in general ventilation systems to seal off smoke and fire between adjacent fire partitions. Fire dampers are classified according to EN 13501-3+A1:2010P. The fire resistance was tested as per PN-EN 1366-2:2015. The entire manufacturing process meets the requirements of EN 15650:2010.

Fire dampers can be installed in horizontal and/or vertical fire partitions to provide fire resistance of up to EI 120 (ve ho i↔o) S (which may depend on the actual fire resistance of the partition). All fire dampers have a torsion spring trip (T) or a return-spring actuator coupled with a thermal trip (M). The spring-action versions can be provided with optional limit switches.