In a centrifugal pump, the impeller and volute work together to accomplish what?

The impeller and volute in a centrifugal pump work together primarily to increase fluid pressure. The impeller, which is a rotating component, imparts kinetic energy to the fluid as it moves through the pump. This action accelerates the fluid, converting this kinetic energy into increased pressure as the fluid exits the impeller.

Once the fluid has gained speed and energy from the impeller, it enters the volute, which is a stationary casing designed to collect the fluid discharged by the impeller. The volute's shape gradually expands, allowing the velocity of the fluid to decrease, which in turn increases the pressure throughout the system. This synergy between the impeller's kinetic energy and the volute's pressure conversion is critical in enabling the pump to effectively move and pressurize fluid for various applications.

In contrast, while filling the pump with fluid is an important function during the operation, it is not the primary role of the impeller and volute working together. Circulating the fluid is an outcome of increased pressure but does not encapsulate their main function. Draining the pump is a separate process and not related to the function of the impeller and volute in terms of pressure dynamics.