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Positive Displacement Pumps

These pumps are often thought of as high-pressure pumps. Their positive displacement of fluid and fixed volume are the result of the fluid being mechanically moved through their pump passage on a regular cycle. This means that regardless of the system they discharge into, the pressure and volume will remain constant. The power of the driving device and its speed, limit the volume and pressure.Positive Displacement pumps:Flow rates of GPD, CC/min to 100 GPM typically.Discharge pressures of a 1 to 1000 PSI.Low speed and fixed volume per cycle, they handle very viscid fluids well.Smaller than centrifugal pumps.Quiet, do not ad much heat to the fluid, suitable for shear sensitive fluids.Diaphragm pumps can easily pass solids, stringy and fibrous foreign matter. Are made in materials from CI to Titanium and PP, PVDF and PPS engineering resins.
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  1. Oberdorfer Pumps

    Bronze Pedestal Gear Pump w/ relief valve

    N9000LR

    $928.80
    Bronze Pedestal Gear pump with relief valve. Often used as a oil pump on large ships to pre-lube the bearings.
    • Gear pumps are positive displacement pumps. Each shaft revolution displaces a definite amount of liquid relatively unaffected by t...
  2. Oberdorfer Pumps

    Bronze Pedestal Gear Pump w/ relief valve

    N9000LRS3

    $951.75
    Bronze Pedestal Gear pump with relief valve. Often used as a oil pump on large ships to pre-lube the bearings.
    • Gear pumps are positive displacement pumps. Each shaft revolution displaces a definite amount of liquid relatively unaffected by the b...
  3. Oberdorfer Pumps

    Bronze Pedestal Gear Pump w/ relief valve

    N9000RES3

    $1,044.00
    Bronze Pedestal Gear pump with relief valve. Often used as a oil pump on large ships to pre-lube the bearings.
    • Gear pumps are positive displacement pumps. Each shaft revolution displaces a definite amount of liquid relatively unaffected by the b...
  4. Oberdorfer Pumps

    Bronze Pedestal Gear Pump w/ relief valve

    N9000RES18

    $1,245.00
    Bronze Pedestal Gear pump with relief valve. Often used as a oil pump on large ships to pre-lube the bearings.
    • Gear pumps are positive displacement pumps. Each shaft revolution displaces a definite amount of liquid relatively unaffected by the b...
  5. Oberdorfer Pumps

    Bronze Pedestal Gear Pump w/ relief valve

    N9000RS15

    $1,044.00
    Bronze Pedestal Gear pump with relief valve. Often used as a oil pump on large ships to pre-lube the bearings.
    • Gear pumps are positive displacement pumps. Each shaft revolution displaces a definite amount of liquid relatively unaffected by the b...
  6. Oberdorfer Pumps

    Bronze Pedestal Gear Pump w/ relief valve

    N9000RS16

    $957.00
    Bronze Pedestal Gear pump with relief valve. Often used as a oil pump on large ships to pre-lube the bearings.
    • Gear pumps are positive displacement pumps. Each shaft revolution displaces a definite amount of liquid relatively unaffected by t...
  7. Oberdorfer Pumps

    Bronze Pedestal Gear Pump w/ relief valve

    N9000RS17

    $1,068.00
    Bronze Pedestal Gear pump with relief valve. Often used as a oil pump on large ships to pre-lube the bearings.
    • Gear pumps are positive displacement pumps. Each shaft revolution displaces a definite amount of liquid relatively unaffected by the b...
    FKM Mechanical seal Learn More
  8. Oberdorfer Pumps

    Bronze Pedestal Gear Pump w/ relief valve

    N7000R

    $1,044.00
    Bronze Pedestal Gear pump with relief valve. Often used as a oil pump on large ships to pre-lube the bearings. Pump flow is reversible.
    • Gear pumps are positive displacement pumps. Each shaft revolution displaces a definite amount of liquid...
    3/4" Packed Learn More
  9. Oberdorfer Pumps

    Bronze Rotary Gear Pump & Motor

    N61K10G-01F02

    $555.00
    PUMP AND MOTOR. No relief valve.

    This Bronze Rotary Gear Pump is popular among OEM users. It is a diesel fuel transfer pump featuring an all bronze design and 303 stainless steel shafts with options of non-metallic gears and a variety of sha...

  10. Oberdorfer Pumps

    Bronze Rotary Gear Pump PEO

    N990

    $1,000.00
    Oberdorfer Close coupled bronze rotary gear pump end only.
    • Bronze Construction with SS shaft
    • Helical gears for quiet operation
    • Self-lubricating carbon bearings
    • O-ring seal for max. leak protection
    • Pump End Only (Motor Not Included)
    pump only Learn More
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