The Valve Dampers and the VAV Damper are designed to meet the requirements for laboratory ventilation. The dampers are pressure independent and self-compensates for pressure changes in the duct system.
The damper’s settings are controlled by a motor with a response time of a maximum of 1 sec.

The fast response time and high accuracy ensures against leakage in the fume cupboard and maintains a constant air velocity in the fume cupboard.