The fire dampers are designed for circular air ducts with a diameter of 100 - 315 mm.
The dampers are suitable for installation in all common building constructions, they can be installed in fire separation construction with the axis of the sheet vertically and horizontally.
Activation of the damper in case of fire is ensured by a 72 °C thermal fuse as standard, the closing of the damper after activation of the thermal fuse of the thermoelectric actuator is ensured by the closing spring of the actuator.