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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

    N993 Bronze Pump & Motor

    N993M-J07

    $1,146.00
    Bronze 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 ar...

    1/2 HP 115v Learn More
  2. Pulsafeeder

    Metering Pump - 30 GPD/80 PSI

    LC54SA-PTC1

    $642.00
    Our lowest cost model; Manual function control for stroke length; Highly reliable timing circuit; EMI resistant; Thermally protected solenoid with auto-reset, Bleed valve assembly. Four compact and rugged models with capacities up to 30 GPD @ 80 ...
  3. Pulsafeeder

    METERING PUMP 12GPD/100 PSI

    LPA3MA-PTC1

    $1,176.48
    The Series E Plus offers the option to choose between4-20mAfor external pace inputs for automatic control.
    • 20 flow/pressure envelops
    • 100:1 turn down ratio
    • Optional 4-20mA with stop function
    • Optional External Pacing with stop function
    • Auto-off-Ma...
  4. Oberdorfer Pumps

    Close Coupled Bronze Rotary Gear Pump

    N999Q-F09

    $1,009.00

    Features N999 Series:

    • Compact design eases installation and use in limited space areas.
    • Construction is bronze and stainless steel wetted components.
    • Close tolerance design allows for consistent performance
    • Helical gears for quiet operatio...
  5. Oberdorfer Pumps

    N992R Gear Pump & EXP Motor

    N992RQ-F09

    $1,611.50
    Explosion Proof Gear Pump with housings and gears are made of top quality bronze; shafts are from stainless steel 303. Hazardous Duty gear pump fitted with EXP motor. Bearings are designed of high performance carbon-graphite material selected f...
    1/3HP 115v Explosion Proof Learn More
  6. Oberdorfer Pumps

    N992R Gear Pump & Mtr & Relief

    N992R-F41

    $936.10
    Bronze rotary gear pump with relief valve, electric motor.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 resi...
    1/3HP 115v ODP Relief valve Learn More
  7. Pulsafeeder

    METERING PUMP 120GPD/100 PSI

    LPH6MA-PTC3

    $2,338.59
    The Series E Plus offers the option to choose between4-20mAfor external pace inputs for automatic control.
    • 20 flow/pressure envelops
    • 100:1 turn down ratio
    • Optional 4-20mA with stop function
    • Optional External Pacing with stop function
    • Auto-off-Ma...
  8. Pulsafeeder

    METERING PUMP 192GPD/50 PSI

    LPK7MA-PTC3

    $1,954.53
    The Series E Plus offers the option to choose between4-20mAfor external pace inputs for automatic control.
    • 20 flow/pressure envelops
    • 100:1 turn down ratio
    • Optional 4-20mA with stop function
    • Optional External Pacing with stop function
    • Auto-off-Ma...
  9. Pulsafeeder

    METERING PUMP 22GPD/150 PSI

    LPD4MA-PTC1

    $1,397.07
    The Series E Plus offers the option to choose between4-20mAfor external pace inputs for automatic control.
    • 20 flow/pressure envelops
    • 100:1 turn down ratio
    • Optional 4-20mA with stop function
    • Optional External Pacing with stop function
    • Auto-off-Ma...
  10. Pulsafeeder

    METERING PUMP 240GPD/35 PSI

    LPH7MA-PTC3

    $2,592.02
    The Series E Plus offers the option to choose between4-20mAfor external pace inputs for automatic control.
    • 20 flow/pressure envelops
    • 100:1 turn down ratio
    • Optional 4-20mA with stop function
    • Optional External Pacing with stop function
    • Auto-off-Ma...
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