Opposed Blade Damper

The opposed blade damper applies high quality extruded aluminum profile as its raw materials. It is a kind of volume control damper principally used to control the diffuser air volume at the duct side. Two models as OBD-VA and OBD-VB are for your choice.

OBD-VA opposed blade damper is specially designed with accurate gear wheel control. In general, it is installed on the back side of a square diffuser. This design has a handle, users can directly control the damper without removing the center core of the diffuser.

The specially designed OBD-VB duct damper is perfectly ideal for grilles. It can be quickly adjusted via a screw driver. This air volume control solution is usually fixed on the back side of different kinds of grilles.