How do multistage centrifugal pumps produce higher pressure?

Multistage centrifugal pumps achieve higher pressure by linking multiple impellers together in a single system.1

In this configuration, the fluid is directed through a series of stages where the outlet of one impeller casing serves as the inlet for the next. As the fluid passes through each successive impeller, additional energy is imparted to it, resulting in a cumulative increase in pressure. This design allows the system to produce a continuous flow of fluid at a significantly higher pressure than a single-stage pump could achieve on its own.1