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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

    1.25" Bronze gear pump

    N1100W-T98

    $2,806.70
    1 1/4" Bronze rotary gear pump with relief valve and close coupled to a 1 1/2 HP TEFC motor.

    Use to pump oil and other viscous thick liquids, De-icing fluids.

    1.5HP 230/460v Learn More
  2. Oberdorfer Pumps

    Gear Fuel pump

    N1000S3

    $487.50
    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.
  3. Oberdorfer Pumps

    10 GPM CI GEAR PUMP & PED

    10GB1111S

    $1,316.90
    Medium duty CI gear pump with relief valve and pedistal for long coupling. Mechanical sealed, bronze bearings. CW rotation.

    b>Features:

    1. Shafts: Ground and polished steel.
    2. Helical Gears: For quiet running.
    3. Housing: Of close grain cast iron. Three...
  4. Oberdorfer Pumps

    18 GPM CI GEAR PUMP & PED

    18GB1111S

    $1,593.80
    Medium duty CI gear pump with relief valve and pedistal for long coupling. Mechanical sealed, bronze bearings. CW rotation.

    b>Features:

    1. Shafts: Ground and polished steel.
    2. Helical Gears: For quiet running.
    3. Housing: Of close grain cast iron. Three...
  5. Oberdorfer Pumps

    Bronze Rotary Gear Pump EXP

    N999-spec

    $1,560.00
    1/2 gpm diesel oil pump with EXP motor.

    Features N999 Series:

    • Compact design eases installation and use in limited space areas.
    • Construction is bronze and stainless steel wetted components.
    • Close tolerance design allows for consistent perf...
  6. Oberdorfer Pumps

    Close Coupled Bronze Rotary Gear Pump

    N999Q-J46

    $1,834.30

    Features N999 Series:

    • Compact design eases installation and use in limited space areas.
    • Construction is bronze and stainless steel wetted components.
    • Close tolerance design allows for consistent performance
    • Helical gears for quiet operatio...
  7. Oberdorfer Pumps

    Close Coupled Bronze Rotary Gear Pump

    N999R-F41

    $908.70
    Bronze gear pump mounted to a 1725rpm 1/3 HP motor. Pump has relief valve.

    Features N999 Series:

    • Compact design eases installation and use in limited space areas.
    • Construction is bronze and stainless steel wetted components.
    • Close toleran...
    115v 1/3HP Learn More
  8. Oberdorfer Pumps

    DC Bronze Rotary Gear Pump

    N999R-C81

    $1,875.90
    Bronze 12v DC gear pump mounted to a 1200rpm 1/4 HP motor. Pump has relief valve.

    Features N999 Series:

    • Compact design eases installation and use in limited space areas.
    • Construction is bronze and stainless steel wetted components.
    • Close ...
    12 volt DC 1/4" Learn More
  9. Oberdorfer Pumps

    Close Coupled Bronze Rotary Gear Pump

    N999RM-F07

    $1,241.50
    Bronze gear pump mounted to a 1725rpm 1/3 HP motor. Pump has relief valve.

    Features N999 Series:

    • Compact design eases installation and use in limited space areas.
    • Construction is bronze and stainless steel wetted components.
    • Close toleran...
  10. Oberdorfer Pumps

    Close Coupled Bronze Rotary Gear Pump

    N999Q-32-J46

    $1,283.10

    Features N999 Series:

    • Compact design eases installation and use in limited space areas.
    • Construction is bronze and stainless steel wetted components.
    • Close tolerance design allows for consistent performance
    • Helical gears for quiet operation.

    Pu...

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