Oberdorfer # 109MBP-01J58 Bronze Centrifugal Pump and Motor 1/2 HP

The Oberdorfer 109MBP-01J58 is a Bronze Centrifugal Pump and motor unit, with Bronze Impeller, Buna Mechanical Seal, Monel shaft, 1-1/4 Inch NPT Inlet by 1 Inch NPT Outlet Ports, close coupled to a 1/2 Horsepower, 3450 RPM, 208-230/460 Volts, Three Phase, TEFC (Totally Enclosed Fan Cooled) Motor. This close-coupled pump and motor unit uses a standard NEMA 56J Flange Jet Pump Motor with weld-on base and threaded shaft end to accept the pump impeller. The shaft on this pump unit is Monel which is one of the most resistant materials to seawater corrosion. It has a three phase motor that must be checked out for proper rotation when pump is installed, which is counter-clockwise looking at inlet end of pump. Interchanging of any 2 wires in a 3-phase system will reverse motor rotation. The pump uses a mechanical type shaft seal with a Buna rubber element. It is suitable for water, oils, and some mild solvents and it is limited to 212 degrees F. This long-life centrifugal pump delivers high flows up to 70 GPM with a maximum pressure of 19 PSI. These centrifugal 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. This pump operates by liquid entering at the center and being 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.