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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

    N994 12v DC Gear Pump

    N994H-H75

    $1,729.00
    12v DC 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.

    12 volt Gear ...

    1HP 12VDDC Learn More
  2. Oberdorfer Pumps

    Rubber Impeller Bronze Pump

    405M-04N26

    $1,203.00

    Oberdorfer rubber (flex) impeller pump with solid cast bronze housing. Close coupled Rubber Impeller Pumps are made of high quality bronze for maximum corrosion resistance. The rubber impeller is mounted on a separate stainless steel shaft which i...

    115v 1HP 1" ODP Learn More
  3. Oberdorfer Pumps

    Rubber Impeller Bronze Pump

    405M-04M35

    $1,616.00

    Oberdorfer rubber (flex) impeller pump with solid cast bronze housing. Close coupled Rubber Impeller Pumps are made of high quality bronze for maximum corrosion resistance. The rubber impeller is mounted on a separate stainless steel shaft which i...

    115v 3/4HP 1" TEFC Learn More
  4. Oberdorfer Pumps

    N993 Pump & motor 12VDC

    N993-C81

    $1,395.00

    12VDC gear 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.

    12 volt Gear pumps ar...

    12VDC Learn More
  5. Oberdorfer Pumps

    N993 Pump & motor 12VDC

    N993Q-J75

    $1,776.00

    12VDC gear Pump 1/2HP.

    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.

    12 volt Gear pu...

    12VDC Learn More
  6. Oberdorfer Pumps

    Gear Pump & 1/4HP Motor

    N992R-01C81

    $1,630.20

    Bronze Gear Pump with housings and gears are made of top quality bronze; shafts are from stainless steel 303. Continuous Duty gear pump fitted with 115/230v 1/4hp motor. Bearings are designed of high performance carbon-graphite material selected f...

    1/4HP 115/230V ODP Learn More
  7. Oberdorfer Pumps

    Gear Pump & 12VDC Motor

    N992R-C81

    $1,618.10
    12V DC Gear Pump with relief valve. Housings and gears are made of top quality bronze; shafts are from stainless steel 303. Continuous Duty gear pump fitted with 12V DC motor. Bearings are designed of high performance carbon-graphite material s...
    1/3HP 12V DC Relief valve Learn More
  8. Oberdorfer Pumps

    N993 Pump & motor

    N993RM-J07

    $1,238.00
    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 displac...

    1/2HP 115/230v Relief Vavle Learn More
  9. Oberdorfer Pumps

    1.25" Bronze gear pump

    N11500-21

    $1,642.00
    1 1/4" Bronze rotary gear pump without relief valve. Pedestal mount pump only. Upper drive shaft location. See performance graph for flow rates vs motor RPM and HP (under image tab) . If used above 900 RPM, then duty cycle is limited to intermitt...
    Up to 55GPM Learn More
  10. Oberdorfer Pumps

    1.25" Bronze gear pump

    N11500S5

    $1,748.00
    1 1/4" Bronze rotary gear pump without relief valve. Pedestal mount pump only. Upper drive shaft location. See performance graph for flow rates vs motor RPM and HP (under image tab) . If used above 900 RPM with non-lubricating fluid, then duty ...
    Up to 55GPM FKM Lip seal Learn More
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