What component type does a centrifugal pump use to create pressure for moving fluids?

A centrifugal pump uses an impeller to create pressure for moving fluids. The impeller is a rotating component that is designed to transfer energy from the motor to the fluid. As the impeller spins, it exerts centrifugal force on the fluid, pushing it outward and increasing its velocity. This increase in velocity generates a difference in pressure, which causes the fluid to flow into the discharge pipe.

The design of the impeller is critical to the pump’s efficiency and performance. The shape and size of the impeller blades determine how effectively the pump can move the fluid and the amount of pressure it can generate.

In contrast to this, components like check valves, diaphragms, and pistons serve different functions in fluid movement systems. For instance, check valves prevent backflow, while diaphragms and pistons are typically found in positive displacement pumps, which operate on a different principle than centrifugal pumps. Thus, the impeller is essential in the operation of a centrifugal pump, making it the correct answer.