• VIV Dampers are used for capacity modulation. They give accurate modulation and power savings over other styles of dampers at reduced air flow.
• When an inlet vane is partially closed, each blade directs the air into the impeller in the direction of rotation and so the air is prespun.This brings about a reduction in the Capacity, Static Pressure and BHP. The amount of BHP savings at reduced capacity is determined by the type of system and type of fan-vane combination.
• Adjustment can be made either automatically be pneumatic / electrical actuator or manually by hand.