What is the main operating unit of a centrifugal pump?

The main operating unit of a centrifugal pump is the impeller. The impeller is a rotating component that transfers energy to the fluid, causing it to flow. When the impeller spins, it creates a centrifugal force that pushes the water outward and increases its velocity. This action generates pressure that moves the fluid through the piping system.

The design and efficiency of the impeller are critical, as they directly influence the pump's performance and capacity. A well-designed impeller will ensure that the pump operates efficiently, providing the necessary flow and pressure while minimizing energy consumption.

The other components mentioned, such as the motor, compressor, and valve, play supporting roles in the operation of a pump or the overall system but do not function as the primary operator of the centrifugal pump itself. The motor powers the impeller, while a compressor is typically used in gas applications rather than typical fluid pumping, and valves control the flow within the system but are not involved in the actual pumping action.