Blower Wheels, Centrifugal Impeller

There are 9 basic types of blower wheels or centrifugal impellers used in industrial blowers:

  1. Shrouded Radial Blade
  2. Open Radial Blade
  3. Open Paddle Wheel
  4. Backward Inclined
  5. Backward Curved
  6. Airfoil Blade
  7. Forward Curved Multi-vane (Squirrel Cage)
  8. Backward Curved Radial
  9. Radial Tip
Shrouded Radial Blade

Type 1

Shrouded Radial Blade blower wheels are designed to deliver higher pressures for pressurizing, blow-off systems and long duct or pipe runs. Available in Models PB, SPB, PBS, RBE, and HP-II.

Open Radial Blade

Type 2

Open Radial Blade with back plate blower wheels are designed for conveying powdery or granular material and long stringy paper trimmings or fibers. Available in Models PB, SPB, PBS, and RBE.

Open Paddle Wheel

Type 3

Open Paddle Wheel is primarily for conveying powdery or granular material. This wheel type is not available from Cincinnati Fan.

Backward Inclined

Type 4

Backward Inclined blower wheels are available with a flat blade design. These wheel types are commonly used for general ventilation, forced cooling at higher pressures and in dust collection systems where the fan is on the clean air side of the dust collector. Available in Models HDBI, SQBI, and CPF.

Backward Curved

Type 5

Backward Curved blower wheels provide high efficiency and low noise. They are typically used for general ventilation, dust collection where the fan is on the clean side of the dust collector, combustion air, and drying. Available in Models HDBI and CPF.

Airfoil Blade

Type 6

Airfoil Blade wheels incorporate a blade design with the cross section of an airplane wing. They are the most efficient design for moving large volumes of air. They are commonly used for ventilation, forced cooling at higher pressures, and on dust collectors, where the fan is on the clean side of the collector. Available in Models HDAF, SQAF, and CPAF.

Forward Curved Multi-vane

Type 7

Forward Curve Multi-vane blower wheels are for moving large volumes of air at lower pressures. Typically selected for general ventilation or forced cooling at slower speeds. Available in Models LM and LMF.

Type 8

Backward Curved Radial blower wheels are a modified version of the Open Radial Blade wheel. It is designed to expand the performance ratings of open radial bladed wheels in some direct driven fans. In some cases, it can be used to convey granular material but should not be used to convey powdery or stringy material. Available in Models PB, SPB, and PBS.

Radial Tip Wheel

Type 9

Radial Tip wheels are designed to be self-cleaning because of the forward curve blade profile. It is designed for highly efficient performance in applications with clean and dirty air systems. Available in Model RTE.


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