Rushton Turbine

The Rushton turbine is a disk type (six blade turbine) radial flow impeller.
The diameter of the disk ranges from 66 to 75 percent of the internal vessel diameter.
Impeller design is best suited for gas liquid contacting because of the circular disk.
Gas is introduced through a sparger below the impeller; the disk directs the gas along a path of maximum liquid contact and prevents the gas from taking the direct vertical route along the mixer shaft
Variant of the Rushton turbine is the Smith impeller in which the impeller blades are semi – circular or parabolic, instead of flat.
For gas dispersion, the impeller shape allows for much higher power levels to be obtained in the process as compared to the Rushton turbine.