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Oberdorfer N3000S3 Bronze Gear Pump, NO MOTOR

Oberdorfer N3000S3, max flow 8 gpm, inlet size 3/8 in, NPT inlet/outlet connection type, Lip Seal seal type, 1.4 horsepower, No relief valve. Motor NOT Included
Burt Process is an AUTHORIZED DISTRIBUTOR of this product.

Product images shown are for illustration purposes only 
and may not be an exact representation.

Notes N3000S3 Bronze Pedestal Gear Pump Max Flow 8 GPM, Inlet Size 3/8 In, NPT Inlet/Outlet Connection Type, Lip Seal Seal Type, 1.4 Horsepower, No Relief Valve
Weight (lbs) 6.8
  • Pump housings and gears are made of top quality bronze, shafts are 303 stainless steel. Bearings are made of high performance carbon-graphite material selected for wear resistance and long service life. Gear pumps are positive displacement pumps. Each shaft revolution displaces a definite amount of liquid relatively unaffected by the back pressure in the discharge line. Shaft speed and flow are directly proportional.

    • Bronze Corrosion Resistant Castings
    • Special Cast Bronze Gears
    • Stainless Steel Shafts & Fasteners
    • Formed Ring Seal Packing (Lip & Mechanical Seals on Special Order)
    • Heavy Duty Carbon Bearings (Self Lubricating)
    • Positive Displacement Flow

    Either direct drive with flexible coupling or pulley drive can be used. Make sure both flexible coupling halves are properly aligned. When using a pulley, do not over tighten the belt. Also, to absorb belt side thrust at higher pressures and larger size pumps, an external ball bearing support is recommended --consult factory.


    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). 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 and mechanical 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.


    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.