What is the primary function of an impeller in a pump?

The primary function of an impeller in a pump is to increase pressure. An impeller is a rotating component that is typically designed with blades that impart kinetic energy to the fluid being moved. As the impeller spins, it draws fluid into the center and then forces it outward through the blade tips, thereby increasing the velocity and pressure of the fluid.

This increased pressure is vital for enabling the pumped fluid to overcome resistance in the piping system, allowing it to be transported effectively to its intended location, whether that be for heating systems, water supply, or industrial processes. The design and configuration of the impeller directly affect the efficiency and performance of the pump, making it a crucial element for achieving the desired flow and pressure capabilities.