Turbine agitator: Blades directly attached to hub or blades attached to a centre disc, use of two agitators if height of tank is larger. Agitators have variety of shapes. They are capable of creating a vigorous mixing action, due to centrifugal and rotational motion. 

Back-sloped turbine offers maximum power economy. A stator ring surrounding this agitator gives an efficient mixing action. Radial bladed turbine gives higher discharge velocity, but required more power. More commonly used type is the pitched blade turbine which gives both radial and axial flow. Blades directly attached to hub or blades attached to a centre disc, use of two agitators if height of tank is larger.