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N Oberdorfer Gear Pumps Bronze

Oberdorfer Bronze Gear pumps Pump housings and gears are made of top quality bronze, shafts are from stainless steel 303. Bearings are designed 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 l9iquid relatively unaffected by the back pressure in the discharge line. Shaft speed and flow are directly proportional. Recommended pressure limits are 100 psi for water and non-lubricants, 150 psi for oil and lubricants. Maximum shaft speed is 1750 rpm.

A relief valve is necessary in the system if the discharge line contains any throttling devices, such as a shut-off valve, a spray nozzle or other restrictive device. This will return the liquid to the suction side or to the tank. The relief valve is also available as part of the pump itself (R-model pumps). However, built-in relief valves are only good for intermittent service. A built-in relief valve is strictly a safety device against overpressure. It will not work successfully as a pressure or flow control device. For this purpose a separate relief valve in the pressure line must be used.

Service life will be increase substantially if the liquid pumped is clean and has a lubricity value. These pumps have extremely close tolerances. Fine abrasives like sand, silt, or powder in suspension will destroy pumping ability.

Liquids compatible with bronze, stainless steel and the acrylic graphite packing can be pumped. Solvent resistant packings and Teflon® packings are also available.

Temperature extremes are detrimental to service life and should be avoided. Basic metals of construction allow temperature range of _40F to 400F. The acrylic graphite packing is rated to 500F. Freezing liquid in the pump can deform or damage the pump.

Viscous liquids such as molasses or oils require a lower pumping speed, in extreme cases as low ass 200 R.P.M. Liquids with specific gravities heavier than water such as dry cleaning fluids require an increase in motor horsepower directly proportional to the increase in specific gravity over water.

A rotary gear pump is capable of lifting water on the suction side as high as 20 feet. Though gear pumps are self-priming, a foot valve is recommended. For pumping water directly from streams or ponds, a wire mesh strainer must be used at the beginning of the suction line to prevent stones from entering the pump. Strainer and foot valve are commercially available as combination units.

NOTE: For the individual pump performance curves and dimensional drawings, please select a model from below. Used for vegetable oil, biodiesel.

N Oberdorfer Gear Pumps Bronze

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  1. Oberdorfer

    N991 Oberdorfer PUMP & MTR.

    N991-F41

    Glycol circulation Pump by Oberdorfer is just one of hundreds of
    applications. Pump housings and gears are made of top quality
    bronze; shafts are from stainless steel 303. Bearings are designed
    of high performance carbon-graphite material selec...
    1/2HP 115
  2. Oberdorfer

    N991 Oberdorfer Bronze gear pump & motor

    N991-32F41


    Oberdorfer Bronze gear pump & motor. 3/8" Pump housings
    and gears are made of top quality bronze; shafts are from stainless
    steel 303. Bearings are designed of high performance
    carbon-graphite material selected for wear resistance and long
    servic...
    115v 3/8"
  3. Oberdorfer

    Bronze Cooling Gear Pump w/ relief valve

    N1000R-66

    Water-cooled induction heating systems / machine cooling Pump. Bronze Pedestal Gear pump
    with relief valve. Often used as a coolant pump Ameritherm, Dynaflux. Pump flow is reversible.

    • Gear pumps are positive displacement pumps. Each shaft
      re...
    Water-cooled induction heating systems / machine cooling Pump. Bronze Pedestal Gear pump
    with relief valve. Often used as a coolant pump Ameritherm, Dynaflux. Pump flow is reversible.

    • 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.
  4. Oberdorfer

    N994 12v DC Gear Pump

    N994H-H75

    12v DC Gear Pump. Pump housings and gears are made of top quality bronze;
    shafts are from stainless steel 303. Bearings are designed of high
    performance carbon-graphite material selected for wear resistance
    and long service life.

    12 volt Gear ...

    1HP 12VDDC
  5. Oberdorfer

    N993 Bronze Pump & Motor

    N993M-J07


    Bronze Gear pump. Pump housings and gears are made of top quality
    bronze; shafts are from stainless steel 303. Bearings are designed
    of high performance carbon-graphite material selected for wear
    resistance and long service life.

    Gear pumps are p...

    1/2 HP 115v
  6. Oberdorfer

    Cooling Gear Pump w/ relief valve

    N1000R39

    Heliarc Welding machine cooling Pump. Bronze Pedestal Gear pump
    with relief valve. Often used as a coolant pump on welding torch,
    Miller welder heli-arc. Pump flow is reversible. Round body "no
    feet body".

    • Gear pumps are positive displacemen...
    Heliarc Welding
  7. Oberdorfer

    N993 Pump & motor

    N993RM-J07


    Pump housings and gears are made of top quality bronze; shafts are
    from stainless steel 303. Bearings are designed of high performance
    carbon-graphite material selected for wear resistance and long
    service life.

    Gear pumps are positive displaceme...

    1/2HP 115/230v Relief Vavle
  8. Oberdorfer

    Bronze gear pump

    N993C-M26


    Bronze gear pump. Pump housings and gears are made of top quality
    bronze; shafts are from stainless steel 303. Bearings are designed
    of high performance carbon-graphite material selected for wear
    resistance and long service life.

    Gear pumps are p...

    3/4HP 115/230v
  9. Oberdorfer

    N993 bronze Gear pump

    N993R


    Pump Only PEO, no motor.Pump housings and gears are made of top
    quality bronze; shafts are from stainless steel 303. Bearings are
    designed of high performance carbon-graphite material selected for
    wear resistance and long service life.

    Gear pumps...

    Pump Only PEO Relief
  10. Oberdorfer

    N991 Bronze gear pump PEO

    N991R-32


    Bronze gear pump & motor. 1/4" Pump housings and gears
    are made of top quality bronze; shafts are from stainless steel
    303. Include relief valve built in. Bearings are designed of high
    performance carbon-graphite material selected for wear resist...
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Items 1 to 10 of 28 total

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