Open Blade Turbine

In open blade turbine, the blades are directly mounted on the hub. The number of blades may be two, four, six or eight. Two-blade paddle is generally used for solid suspension or blending applications requiring high flow and low shear. Paddles are normally operated at low speeds Coil impellers were developed for applications where solids frequently settle at the bottom of the vessel Spring design ensures that the impeller has adequate mechanical rigidity, strength to overcome the resistance offered by stiff solids during mixing operation