Gene Vogel
EASA Pump & Vibration Specialist
“Submersible Pump Seal Fluid Guidelines,” the November 2023 Currents article, addressed options for seal oil in submersible pumps. In addition to seal oil, some submersibles have an oil filled stator cavity. The oil in the stator cavity very efficiently transfers heat from the stator winding and core, and especially from the rotor, to the pump casing where convection carries it to the pumpage in which the pump is submerged. While the specifications for seal oil are fairly flexible, stator cavity oil has more constraints.
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