The self-closing multi-blade non-return steel dampers with aluminium blades
are designed for air pressure control in the ventilation system. The blade
design and mounting allow automatic air flow exhaust under the incoming pressure.
This prevents overpressurizing the ductwork. The housing is made of galvanized steel angles.
The blades are made of aluminium sections.
The air damper is provided with a housing made of 4 angles of the same type as those used
in the fabrication of the DSQW air dampers. All blades are provided with sealing gaskets.
