Model 109MB Close-Coupled Centrifugal Pump
Rugged Bronze Construction - 115/230 VAC Single Phase
Oberdorfer centrifugal pumps have a single rotating metal impeller. Liquid enters at the center and is thrown outward radially by centrifugal force. The impeller is not in contact with other pump parts, resulting in quiet, efficient pumping action. The flow produced is not positive, which permits the discharge line to be shut off completely without danger of overloading motors or bursting lines. Consequently, a relief valve is not required. The liquid flow is proportional to the pump speed, and the higher the speed the greater the flow. Horsepower required varies directly as flow and pressure. Maximum horsepower is required with a wide open discharge line - point of maximum flow. With a throttled discharge, the flow decreases at a greater rate than the pressure increases, thereby requiring less horsepower at the higher pressures. This is known as an "unloading" feature of the pump.
Repair Kit of genuine Oberdorfer repair and service parts for this pump is also available and sold separately. Sku# 40382.
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Parts listed below are specific to the pump model(s) featured here. For additional parts that are common to this and other Oberdorfer pumps, as well as a pump schematic, use the link below.