2-Pole versus 4-Pole Motors for Submersible Solids Handling Pumps

The 2-pole 3500 nominal rpm motors are becoming the preferred solution for lower flow/higher head applications on an increasing basis. Why are we seeing this change? New technologies allow pumps driven by 2-pole motors to be designed for operation at 3500 rpm while achieving the same flow and head characteristics as those designed for operation at 1750 rpm. Lower internal velocities eliminate the concerns that higher speeds will increase the erosive wear rate. Today’s machines, using Computational Fluid Dynamics (CFD), are designed with considerations suitable for life spans at 2-pole speeds and can simulate sand wear as well as analyzing forces and vibrations at various flow levels.

For a list of considerations when comparing the 2-pole to the 4-pole motors, download our white paper here or contact us for a virtual learning session.