In general, pumps can be classified into 2 parts, positive pump displacement and dynamic work pump.
Positive Displacement Pump or commonly called a positive action pump. This type of pump that utilizes mechanical energy from the rotation of the pump shaft is converted into pressure energy to pump fluid. At this type of pump produced a high head but the resulting capacity is low.
Centrifugal Pump (Dynamic Pump / Centrifugal Pump) is a type of pump that has the main element of a motor with impeller rotating at high speed. The incoming fluid is accelerated by an impeller which increases fluid speed and pressure and throws out volut.