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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 N4000L Bronze Pedestal Gear Pump

    Oberdorfer Pumps

    Bronze Pedestal Gear Pump

    N4000L
    $854.10
    Bronze Pedestal Gear pump. Often used as a oil pump on large ships to pre-lube the bearings. See performance chart for motor speed VS HP VS performance.
    • Gear pumps are positive displacement pumps. Each shaft revolution displaces a definite a...
    1/2" Learn More
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  2. Oberdorfer N9000LRS15 Bronze Pedestal Gear Pump w/ relief valve

    Oberdorfer Pumps

    Bronze Pedestal Gear Pump w/ relief valve

    N9000LRS15
    $1,393.47
    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...
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  3. Hypro GMBN Bronze Gear pump only peo

    Hypro Pumps

    Bronze Gear pump only

    GMBN3VA
    $1,295.88
    Rotary Gear pump end. 303 SS fasteners, Ryton gears.

    Adjustable relief valve designed for internal pressure relief, can be ported for either internal or external discharge. Do not operate the relief valve for more than one minute.

    Use for pres...

    3/8" motor mount kit Learn More
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  4. Oberdorfer N9000RE Bronze Pedestal Gear Pump w/ relief valve

    Oberdorfer Pumps

    Bronze Pedestal Gear Pump w/ relief valve

    N9000RE
    $1,357.20
    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...
    Learn More
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  5. Oberdorfer N9000RES17 Bronze Pedestal Gear Pump w/ relief valve

    Oberdorfer Pumps

    Bronze Pedestal Gear Pump w/ relief valve

    N9000RES17
    $1,388.40
    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...
    Learn More
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  6. Hypro MCN6VB Rotary Gear pump only

    Hypro Pumps

    Rotary Gear pump only

    MCN6VB
    $5,266.34
    Rotary Gear pump end. Cast Iron with 303 SS fastners, CI gears.

    Adjustable relief valve designed for internal pressure relief, can be ported for either internal or external discharge. Do not operate the relief valve for more than one minute.

    U...

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  7. Oberdorfer N9000RS18 Bronze Pedestal Gear Pump w/ relief valve

    Oberdorfer Pumps

    Bronze Pedestal Gear Pump w/ relief valve

    N9000RS18
    $1,708.20
    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...
    Learn More
    Add to Wish List Add to Compare
  8. Hypro MBN3VA Bronze Gear pump only

    Hypro Pumps

    Bronze Gear pump only

    MBN3VA
    $5,401.27
    Rotary Gear pump end. 303 SS fastners, Ryton gears.

    Adjustable relief valve designed for internal pressure relief, can be ported for either internal or external discharge. Do not operate the relief valve for more than one minute.

    Use for pressure...

    Learn More
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  9. Oberdorfer N9000RS3 Bronze Pedestal Gear Pump w/ relief valve

    Oberdorfer Pumps

    Bronze Pedestal Gear Pump w/ relief valve

    N9000RS3
    $1,357.20
    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...
    Learn More
    Add to Wish List Add to Compare
  10. Bronze Gear pump

    Hypro Pumps

    Bronze Gear pump

    GMBN4VA5
    $1,615.42

    Rotary Gear pump 3/8". 303 SS fasteners, Ryton gears.

    Adjustable relief valve designed for internal pressure relief, can be ported for either internal or external discharge. Do not operate the relief valve for more than one minute.

    Use for press...

    3/4" 1.5HP 115/230V ODP Learn More
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