In order to meet the requirements for a stable pump head curve, a low pump efficiency is often accepted. The example of a multistage borehole pump shows how this dogma can be broken by means of CFD methods.
Centrifugal pumps in the petrochemical industry must have a steady head curve acc. to API. How this can be improved and the efficiency optimised at the same time can be shown on the example of a vertical tubular casing pump.