Model 170M Close-Coupled Centrifugal Pump
Rugged Bronze Construction - 32 VDC
Oberdorfer centrifugal pumps have a single open-vane rotating 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 of a centrifugal pump can be conveniently controlled by a throttling valve in the discharge line without the need for a relief valve. In centrifugal pumps, the horsepower demand will decrease as the pressure increases. Maximum horsepower occurs with a wide open discharge.
The Model 170M utilizes a lip seal of Buna-N rubber with a stainless steel spring reinforcement on a stainless steel motor shaft. The seal is friction-press fit in a machined housing counterbore. Excessive system pressures above 15 PSI are not recommended, as the seal could be forced out of the pump housing. This close-coupled pump uses a standard TEFC (Totally-Enclosed, Fan-Cooled) motor - Permanent Magnet Type.
Key applications for these pumps include engine block temperature control, marine air conditioning, radiator/heat exchanger circulation and baitwell circulation. Long, trouble-free service life has made centrifugal pumps acceptable for industrial uses or wherever clean or contaminated liquid compatible with bronze is to be transferred or handled, including water, oil and some mild solvents.
Note: These pumps are not self-priming. They must be installed below the liquid level so that the liquid flows to the pump by gravity (flooded suction). However, if a foot valve is used at the beginning of the suction line, and all air is bled from the pump by manual priming, the pump will lift on the suction side up to 15 feet. Such a system relies entirely on the non-leaking foot valve for starting capability.
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