Oberdorfer model # N3000LR-S15 - Pedestal Gear Pump with Relief Valve

Oberdorfer # N3000LR-S15

Oberdorfer catalog # N3000LR-S15, Pedestal Gear Pump (shafted pump end only - for base mounted assembly ) 7 GPM, Viton Lip Shaft Seal. *** c/w Internal Relief Valve ***. 3/8" inch NPT Ports.

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Parts and Accessories for Oberdorfer model N3000LR-S15

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Applications

Features • Bronze corrosion resistant castings • Special cast bronze helical gears for quiet operation • Stainless steel shafts & fasteners • Positive displacement flow • Bronze bearing surfaces with grease fittings Liquids And Temperature Service life will be increased substantially if the liquid pumped is clean and has some degree of lubricity. These positive displacement pumps have tight tolerances. Fine abrasives like sand, silt, or powders in suspension will accelerate pump wear and reduce throughput. Liquids compatible with bronze and stainless steel can be pumped providing proper seal has been specified see chemical compatibility or check factory. No carbon bearings used. When possible, flush the pump after each usage. Temperature extremes are detrimental to service life and should be avoided. Basic metals of construction allow a temperature range of 40 to 400 F. Some lip seal elastomers have a limit of 212 F. see engineering data or check factory. Allowing a liquid to freeze in the pump can cause damage. Suction Lift Close tolerances and the positive pumping action make the rotary gear pump capable of lifting water on the suction side as high as 20 feet. Though gear pumps are self priming, a foot valve is recommended. If possible, wet the gears with liquid to be pumped for the first dry start. Liquid retained in the system and gear chambers serves to wet the pump on subsequent starts. ByPass And Rotation The pump bypass is not intended to be a metering or flow control device. Its main purpose is to function as a pressure relief when the desired set point is exceeded, overheating can occur within 5 10 minutes if the discharge line is completely shut off for extended periods. Reversing rotation reverses the IN and OUT ports and the location of the bypass ports have to be reversed. The bypass valve is factory set at 50 p.s.i. To increase the setpoint, turn the bypass valve adjusting screw in a clockwise direction.