Impeller Diffuser Pump

This is a still representation and possibly also a low-resolution image of a fully animated pump.

The efficiency of the Impeller Pump can be greatly increased by the addition of stationary Diffuser Vanes. Large Impeller-diffuser pumps can achieve efficiency ratings of 90 percent.

The number of diffuser vanes is always different than the number of impeller vanes. This is so that the edges of the rotating impeller vanes do not come close to all the ends of the diffuser vanes at the same time

This prevents thumping or knocking, and excessive buildup of pressures.

In this drawing the innermost set of vanes revolves and the outer set is stationary.

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