Variable Inlet Vane Damper

  • Inlet guide vanes are synchronously adjustable in the same angular position by a connecting element
  • Adjustment can be made either automatically via an adjusting element from pulse generator by hand; energy savings with fans utilising variable inlet vanes; VIV dampers are often 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 wheel 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
  • For every inlet vane position there is different capacity V/s static curve and capacity V/s brake horsepower (BHP) curve generated by the fan
  • VIV dampers are designed with mechanical principle of adjustment; inlet guide vanes are sychronously adjustable in the same angular position by a connecting element
  • Adjustment can be made either automatically via an adjusting element from pulse generator or by hand.

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