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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

    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...
  2. 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
  3. 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...
  4. 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...
  5. 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...

  6. 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...
  7. 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...

  8. 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...
  9. 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
  10. Oberdorfer Pumps

    Bronze Pedestal Gear Pump w/ relief valve

    N1000R

    $401.70
    Bronze Pedestal Gear pump with relief valve. Often used as a coolant pump on welding torch. Pump flow is reversible.
    • Gear pumps are positive displacement pumps. Each shaft revolution displaces a definite amount of liquid relatively unaffecte...
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