Vertical Sump Pumps

Design FeaturesA cantilever shaft pump generally utilizes rolling element bearings to support an overhung shaft that extends downward into a sump or tank. The bearings are mounted above the maximum liquid level so that they are never exposed to the pumped fluid. Because there are no submerged bearings, the pump handles solids without the need for external flush, or any sealing devices, to keep the pumped fluid out of the support column. Cantilever pumps may also be operated dry, or with loss of prime, without damage.Cantilever pumps require no seals or packing when used on open sumps. When applied to closed tanks with hazardous materials, the rolling element bearings limit shaft run-out so that mechanical seals may be applied reliably.