These type turbines are suitable for dispersing and absorbing gas midium as disc locating in the middle,such can disperse gas smoothly.

  Pitch-blade types have slope angle and can produce axial flow.

  Curved blade types have back angle and have large output flow rate and low power consumption.

  These impellers have general characteristics like disc turbine,while the radial section of the blade is camber,which can increase shearing force and mixing efforts. The working conditions of these impellers are the same as those of turbine types.