Centrifugal fans and blowers use several types of wheels or impellers that draw the air or gas into the inlet of the blower housing, through the wheel and discharge it, at 90 degrees, out of the housing.
Centrifugal plug fans typically do not use a housing, and the air is pulled into the inlet of the wheel and discharges 360 degrees around the outside diameter of the wheel.
In high temperature applications, three types of wheels are used – open paddle wheel with radial blades (Model OPB), forward curve bladed (Model MFC) and backward inclined blades (Model BIF).
Open Paddle Wheel with Radial Blades (Model OPB)
- typically used when higher pressures are required
- direct drive and belt drive
- available as plug fans or housed fans
- see performance range, design and application details
Forward Curved Bladed (Model MFC)
- typically used when higher volumes are required
- direct drive and belt drive
- available as plug fans or housed fans
- see performance range, design and application details
Backward Inclined Blades (Model BIF)
- typically used for maximum efficiency
- direct drive and belt drive
- double width fans are available
- see performance range, design and application details