E-PSU: Raw aluminium overpressure damper with movable fins as air passes through with a "U" shaped frame. Maximum effective speed 6 m/sec.

- It is possible to manufacture dampers reinforced with galvanised sheet metal slats.

Finish: Non-anodised aluminium.

Applications: These dampers are used in ventilation ducts. Specially to prevent that cold winter air from outside could get into through the exhaust damper when exhaust fan is stopped.