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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-04M35

    $2,100.80

    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
  2. Oberdorfer Pumps

    Bronze Rotary Gear Pump 1"

    N990H-T47

    $6,037.63

    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
  3. Oberdorfer Pumps

    N993 Pump & motor 12VDC

    N993-C81

    $1,813.50

    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
  4. Oberdorfer Pumps

    3/4" Bronze gear pump 3/4HP

    N970H-M46

    $1,597.70
    3/4" Bronze rotary gear pump with relief valve and close coupled to a 3/4 HP 115v/1/60 1150 RPM TEFC motor. Shaft speed and flow are directly proportional. Motor HP needs to increase with a increase in pump pressure. The nature of a positive disp...
  5. Oberdorfer Pumps

    Bronze Rotary Gear Pump w/ motor

    N990J-T47

    $3,624.13

    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...
    1-1/2HP 115/230v 1" Learn More
  6. Oberdorfer Pumps

    N992R Gear Pump & Mtr

    N992R-C82

    $2,103.53
    24vDC gear pump and motor. 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. Inclu...
    1/4HP 24vDC Learn More
  7. Oberdorfer Pumps

    3/4" Bronze gear pump 1HP

    N970H-N47

    $4,637.18
    3/4" Bronze rotary gear pump without relief valve and close coupled to a 1 HP 115v/1/60 1725 RPM TEFC motor.Pump housings and gears are made of top quality bronze, shafts are stainless steel 303. Bearings are made of high performance carbon-gra...
    115/230v ODP 1HP Learn More
  8. 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
  9. Oberdorfer Pumps

    Close Coupled Bronze Rotary Gear Pump w/ relief valve

    N991RN32-F08

    $1,145.30
    Bronze Rotary Gear Pump with electric motor. Pump housings and gears are made of top quality bronze, shafts are 303 stainless steel. Bearings are designed of high performance carbongraphite material selected for wear resistance and long service...
    Pump & 1/3HP Motor 115v 1/4" Learn More
  10. Oberdorfer Pumps

    Bronze gear pump forward reverse

    N992-37F30

    $2,102.10

    Oil change pump. Pump housings and gears are made of top quality bronze; shafts are from stainless steel 303. Close coupled to a 115vac motor including a Forward / Off / Reverse switch. Often used at dockside for changing the oil in boats. Bearing...

    1/3HP 115v TEFC REVERSIBLE Learn More
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