Model SPT. Pressure relief damper with movable air blades and U-frame. Standard natural aluminium finish.
Pressure relief dampers are used as terminals for low and medium pressure ventilation systems. The moving blades of the damper open under the influence of the pressure increase in a ventilation system, in the same way the damper will be kept closed to protect the ventilation system against rain and possible air flows on its outside surface, thanks to its rotation stops.