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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 Gear Pump & Mtr.

    N994J-W45

    $2,593.50
    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 pos...

    2HP 115/230 Learn More
  2. Aquatec Pumps

    5 chamber diaphragm pump

    5513-1C01-J586

    $290.54
    550 Series Super Flow Pump: Reverse Osmosis System Pump, High Powered RO/DI Reverse Osmosis Pump

    OPERATION: The 550 pumps can draw water from a holding tank and pressurize it, or boost the pressure from a low pressure source. It is designed to op...

  3. Oberdorfer Pumps

    N994 Gear Pump & Motor

    N994H-J46

    $2,652.00

    Gear Pump, Oberdorfer.

    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...

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

    N994 Gear Pump & Motor w/Relief Valve

    N994RH-N26

    $3,432.00

    Gear Pump, Oberdorfer.

    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...

    1HP 115/230v 1/2" Learn More
  5. Aquatec Pumps

    Spray pump

    5502-IDN2-V77D

    $405.88
    5502-1DN2-V77D Spray Pump. Variable speed, constant pressure pumps. These pumps integrate a state-of-the-art digital controller. This unique intelligent controller makes the spray pump able to maintain a constant pressure (within 2 PSI) for var...
    Variable speed 115v Learn More
  6. Pulsafeeder

    100 GPD/60 PSI Metering Pump

    100-XA-AAAAXXX

    $971.10
    100 GPD/60 PSI metering pump 115 vac. 70 strokes / minute max. 1.0 Amps full load.

    Dimensions: 6.75" x 8.875" x 7.25" (H x W x D)

  7. Flojet Pumps

    Industrial Demand Pump

    2100-789

    $675.60
    Spray pump is a Duplex Diaphragm demand pump 115v. Use as a carpet cleaning machines, solar water pump or any other powered shower, sprinkler, misting system. Demand switch automatically turns the spray pump on and off when discharge valve is o...
  8. Oberdorfer Pumps

    Bronze Rotary Gear Pump w/ relief valve & Motor

    N991RM-32F01

    $965.90
    Bronze Rotary Gear Pump. Includes 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 se...
    115v 1/4" 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. March Pumps

    Metering Pump 5-350cc/min

    210-10

    20% Off Special Price $514.80 Regular Price $643.50
    March positive displacement chemical feed pumps aredesigned for precision metering and accurate dispensing. 5 to 350 cc/min adjustable flow rates.They are recommended for intermittent duty only.

    Flow rates can be precisely regulated while the ...

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