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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

    N991 Bronze gear pump PEO

    N991R-32

    $596.70

    Bronze gear pump

    NO motor. 1/4" Pump housings and gears are made of top quality bronze; shafts are from stainless steel 303. Include relief valve built in. Bearings are designed of high performance carbon-graphite material selected for wear resis...

    Pump End ONLY Learn More
  2. Oberdorfer Pumps

    N992 Gear Pump PEO

    N992

    $825.57

    Gear Pump pump end only, 1/4". 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. Incl...

    3/8" Bronze Pump Only Learn More
  3. Aquatec Pumps

    low flo booster pump

    6840-2J03-B331

    $290.54

    • Toughest, most durable pump on the market • Adjustable max. outlet psi.(regardless of feed pressure) • Expels trapped air (no more air locks) • Can be mounted with pump head up or down • More flow at extremely low inlet pressures • New motor ve...

  4. Remco 54REBEL-JRV RV Pump
    Sale

    Remco

    Power RV Pump

    54REBEL-JRV

    35% Off Special Price $211.00 Regular Price $326.54

    Power RV water pump, 4GPM flow. 12 volt DUAL control RV water pump. Controls Pressure by bypass internally and therefore is nearly silent operation / no cycling. • Self-priming / Runs Dry • No Accumulator Tank Needed. Removable port adapters. ...

    Freshwater pump 4.0GPM, 60psi,12v Learn More
  5. Oberdorfer Pumps

    1.5" Bronze gear pump

    N13HDM

    $3,200.00
    1.5" 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. If used above 900 RPM, then duty cycle is limited to intermittent.
  6. Aquatec Pumps

    low flo booster pump

    6840-2J03-C221

    $290.54

    • Toughest, most durable pump on the market • Adjustable max. outlet psi.(regardless of feed pressure) • Expels trapped air (no more air locks) • Can be mounted with pump head up or down • More flow at extremely low inlet pressures • New motor ve...

  7. PumpBiz

    WOBBLE STATOR PUMP & 3 phase MOTOR

    APM-56CSQM-3

    $4,706.56
    Liberty Pumps are backed by over fifty years of progressive cavity pump product sales and technical service experience. American Pump Series Progressive Cavity Pumps are designed with a singular helical rotor that eccentrically turns within a d...
  8. Remco

    AquaJet RV Pump

    55Aquajet-AES

    20% Off Special Price $386.40 Regular Price $483.00
    AquaJet RV water pump, 3.4GPM flow. 12 volt Variable speed RV water pump. Controls Pressure by Changing Motor Speed and therefore is nearly silent operation / no cycling. • Speeds Up As Demand Increases • Self-priming / Runs Dry • No Accumulato...
    Low Flow Water Pump 12v 3GPM Learn More
  9. Fill-Rite

    AC Utility Rotary Vane Pump

    FR701V

    $649.00

    This rugged, positive displacement, Heavy Duty pump is UL listed. Explosion proof UL listed 1/3 HP motor (115 VAC-60Hz) with sealed bearings, Heavy Duty switch, thermal overload protection and junction box. Carbon vanes and ceramic/carbon seals re...

  10. Aquatec Pumps

    low flo booster pump

    6840-2JM3-B221

    $290.54

    • Toughest, most durable pump on the market • Adjustable max. outlet psi.(regardless of feed pressure) • Expels trapped air (no more air locks) • Can be mounted with pump head up or down • More flow at extremely low inlet pressures • New motor ve...

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