An easy-moving control damper is displaced by aerodynamic forces such as to maintain a constant set volume flow throughout the entire differential pressure range. The volume flows are set with the external pointer by reference to a scale.

To simplify applications in individual projects, the controllers can be ordered and installed according to the required size. The desired value is then set simply and reliably when installing the controller.

The controllers are also available with type END acoustic cladding, in order to reduce case-radiated noise.

• Mechanically system powered, without external power suplly
• Low friction control bellows functional also as a damper element
• The flow rate can be set with an external scale
• High accuracy of flow rate
• Orientation-independent and maintenance-free