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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. Jabsco Pumps

    6050 Bronze Utility Pump Flexible Impeller

    6050-0013

    $1,376.88
    Flexible Impeller pump for general transfer pumping using 115V AC power where self-priming, 23 gpm flow and debris tolerance are required. Oil-resistant nitrile impeller is standard. Do not pump gasoline or other flammable liquids. DO NOT RUN D...
    115v 3/4HP TEFC Learn More
  2. 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
  3. 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
  4. Pulsafeeder

    Chemical Feed Pump

    LB02SA-PTC1

    $1,844.33
    Chemical Feed Pump, Metering pump. 5.76GPD The Pulsatron Series A Plus offers manual control over stroke length and stroke rate. Head mat'l is glass-filed PPL.
    • 4 distinct flow/pressure envelops
    • 100:1 turn down ratio
    • Internally dampened to reduce...
  5. Pulsafeeder

    Metering Pump

    LB64SA-PTC1

    $1,084.71
    Metering pump, Chemical Feed Pump. The Pulsatron Series A Plus offers manual control over stroke length and stroke rate. Head mat'l is glass-filed PPL.
    • 1.25 GPH 30GPD 4.7LPH
    • 1/4" ID tubing
    • 100:1 turn down ratio
    • Internally dampened to reduce nois...
  6. Pulsafeeder

    Metering Pump 12 GPD/100 PSI

    LPA3SA-PTC1

    $815.67
    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...
  7. Pulsafeeder

    Metering Pump 20 GPD/250 PSI

    LPF4SA-PTC1

    $1,395.36
    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...
  8. Pulsafeeder

    Metering Pump 22 GPD/150 PSI

    LPD4SA-PTC1

    $1,036.26
    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...
  9. Pulsafeeder

    Metering Pump 3 GPD/300 PSI

    LPK2SA-PTC1

    $2,615.94
    The Series E Plus offers manual control over stroke length andstroke rate as standard. 3 GPD / 0.47 LPH / .125 GPH
    • 20 flow/pressure envelops
    • 100:1 turn down ratio
    • Auto-off-Manual selection switch with indicator lights
    • Built in fuse
    • Clear h...
    Manual Learn More
  10. Pulsafeeder

    Metering Pump 42 GPD/150 PSI

    LPG4SA-PTC1

    $1,480.86
    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...
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