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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.

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  1. Oberdorfer Pumps

    N994 Gear Pump Only

    N994R-S15

    $699.00
    Gear Pump Only. No motor. Pump housings and gears are made of top quality bronze; shafts are from stainless steel 303. Gear Pump KIT. Bearings are designed of high performance carbon-graphite material selected for wear resistance and long servi...
  2. Oberdorfer Pumps

    N994 Gear Pump with motor

    N994S15H-M95

    $1,149.00
    Gear Pump bronze with 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 ...

    3/4HP 230/460v Bronze / FKM Learn More
  3. Oberdorfer Pumps

    Gear Fuel pump

    N1000S3

    $375.00
    1/4" Bronze rotary gear pump without relief valve. Used on simplex diesel fuel day tank. Replaces 1000B-28 and 1000B-19 Simplex diesel fuel sytems.
  4. Oberdorfer Pumps

    N994 Gear Pump & Mtr.

    N994H-N26

    $1,554.00
    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 posit...

    1HP 115/230v Learn More
  5. Oberdorfer Pumps

    N991 Bronze gear pump PEO

    N991-32

    $414.00
    Bronze gear pump . 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 service life.

    Gear pu...

    NO motor 3/8" Learn More
  6. Oberdorfer Pumps

    N991 Gear PUMP & motor

    N991M-J07

    $818.00
    Gear PUMP & 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 a...

  7. Oberdorfer Pumps

    N994 Gear Pump & Mtr.

    N994J-W45

    $1,995.00
    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 positive...

    2HP 115/230 Learn More
  8. Oberdorfer Pumps

    N994 Gear Pump & Mtr.

    N994J-T45

    $1,808.00
    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 posit...

    1-1/2Hp 115/230v Learn More
  9. Oberdorfer Pumps

    N994 Gear Pump & Mtr.

    N994R-N75

    $1,422.00
    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 posit...

    12VDC Learn More
  10. Oberdorfer Pumps

    N994 Gear Pump & Motor

    N994H-J46

    $2,040.00
    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 posit...

    1/2HP 115/230v 1/2" Learn More
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