A centrifugal pump can be further defined as a machine which uses several energy transformations in order to increase the pressure of a liquid. The energy input into the pump is typically the fuel source energy used to power the driver.
Centrifugal pumps - theory and characteristics
Most commonly, this is electricity used to power an electric motor.
Alternative forms of energy used to power the driver include high-pressure steam used to drive a steam turbine.
Fuel oil used to power a diesel engine.
High-pressure hydraulic fluid used to power a hydraulic motor.