What type of impeller aids in pushing liquid to the pump inlet?

The inducer impeller is specifically designed to improve the flow of liquid into the pump inlet by creating a low-pressure area that helps draw the liquid into the pump. It is typically used in applications where the pump needs to handle fluids with low inlet pressure or when the suction conditions might lead to cavitation. The inducer is an essential component in various pump systems, particularly in submersible pumps and some centrifugal pumps, and it functions effectively at low flow rates, which enhances the overall efficiency of the pumping system.

In contrast, mixed flow, high speed, and radial impellers serve different functions. Mixed flow impellers are utilized mainly for transferring fluids at various angles and are suitable for medium head and flow conditions. High-speed impellers are generally used in applications requiring increased velocity for fluid discharge rather than focusing on enhancing inlet flow. Radial impellers push the fluid outward from the center to the discharge, which means they are designed for creating pressure rather than aiding in the suction process. Hence, the inducer is the most appropriate choice for facilitating the flow of liquid into the pump inlet.