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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

    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
  2. 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
  3. Oberdorfer Pumps

    Bronze Rotary Gear Pump 1"

    N990H-T47

    $2,068.00

    1" Close coupled bronze rotary gear pump with motor. 1.5HP

    • Bronze Construction with SS shaft
    • Helical gears for quiet operation
    • Self-lubricating carbon bearings
    • O-ring seal for max. leak protection
    • The pump drive shaft is connected to the mo...
    1-1/2HP 115/230v 1" Learn More
  4. 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
  5. Oberdorfer Pumps

    N992 Pump & Mtr.

    N992-F41

    $1,118.00
    Bronze 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. Motor may not ...
    1/3HP 115v Learn More
  6. 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
  7. Oberdorfer Pumps

    N994 Gear Pump & Mtr.

    N994H-N26

    $1,554.00
    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.

    Gear pumps are posit...

    1HP 115/230v Learn More
  8. Oberdorfer Pumps

    Bronze Rotary Gear Pump w/ motor & relief valve

    N990RH-M46

    $2,114.00
    Oberdorfer Close coupled bronze rotary gear pumps.
    • Bronze Construction with SS shaft
    • Helical gears for quiet operation
    • Self-lubricating carbon bearings
    • O-ring seal for max. leak protection
    • The pump drive shaft is connected to the motor shaf...
  9. Oberdorfer Pumps

    406M Macerator Pump

    406M-04N26

    $1,397.00
    Sewage transfer macerator chopper pump with rubber impeller. Portable all bronze construction. Commercial heavy duty waste pump for pumping out RV, Boat sewage holding tanks. This model does NOT have the optional vacuum switch.
  10. Oberdorfer Pumps

    Bronze Rotary Gear Pump w/ motor

    N990H-N26

    $1,751.00
    Oberdorfer Close coupled bronze rotary gear pumps.
    • Bronze Construction with SS shaft
    • Helical gears for quiet operation
    • Self-lubricating carbon bearings
    • O-ring seal for max. leak protection
    • The pump drive shaft is connected to the motor shaft by ...
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