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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. Pulsafeeder

    Metering Pump 5 GPD/250 PSI

    LPB2SA-PTC1

    $848.16
    The Series E Plus offers manual control over stroke length andstroke rate.
    • 20 flow/pressure envelops
    • 100:1 turn down ratio
    • Auto-off-Manual selection switch with indicator lights
    • Built in fuse
    • Clear hinged cover over controls for water resistance...
  2. 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 ...
  3. Oberdorfer Pumps

    Bronze Rotary Gear Pump w/ motor

    N990J-T47

    $1,871.00

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

    Cast Iron Gear pump

    GMCV6VC7

    $2,587.51
    Rotary Cast Iron Gear pump 1" with electric motor. 303 SS fasteners, steel gears.

    Adjustable relief valve designed for internal pressure relief, can be ported for either internal or external discharge. Do not operate the relief valve for more ...

    3HP 230v/1 ODP 1" Learn More
  5. Oberdorfer Pumps

    N991 Oberdorfer PUMP & MTR.

    N991-F41

    $753.00
    Glycol circulation Pump by Oberdorfer is just one of hundreds of applications. 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 selec...
    1/3HP 115 Learn More
  6. Oberdorfer Pumps

    N991 Oberdorfer Bronze gear pump & motor

    N991-32F41

    $753.00
    Oberdorfer Bronze gear pump & motor. 3/8" 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 ser...
    115v 3/8" Learn More
  7. Pumptec

    Hard surface Pump motor set (hard scape pump)

    80346

    $1,411.42
    Pumptec 120 Volt pressure washer pump provides the best in pressure cleaning and pressure washing performance. The number one tile and grout pump. This electric pressure washer cleaner is one work horse in the pressure washing business and in pow...
  8. Remco

    115v Demand Pump 5.3GPM

    5537-1E1-58C

    $232.62

    Demanding industrial pump environments require precise engineering and quality components—the demand pump was designed with both. Demand pumps operated as a positive displacement pump which has a pressure switch built in. When flow is open the pum...

    5.3GPM 60PSI 120v NPT Learn More
  9. Remco

    Demand/Bypass

    5517-1E1-58C

    $217.33

    115v AC electric diaphragm pump. PROFLO 5500 OVERVIEW Engineered to withstand the most rigorous and punishing duty cycles, the ProFlo 5500 Series Pump is a top-line performer. We make this claim because we use the highest quality American Made pum...

    5.3/gpm 60psi 115v Learn More
  10. Remco

    115v Demand Pump 2.2GPM

    3313-1E1-52C

    $206.41

    115v Demand Pump 2.2GPM

    Demanding industrial pump environments require precise engineering and quality components, the demand pump was designed with both. Demand pumps operated as a positive displacement pump which has a pressure switch built in....

    2.2GPM 60PSI 115AC Learn More
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