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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

    3/4" Bronze gear pump 1HP

    N970H-N75

    $2,659.00
    3/4" Bronze rotary gear pump without relief valve and close coupled to a 1 HP 12VDC 1725 RPM motor. Often used to pump Diesel fuel. Pump housings and gears are made of top quality bronze, shafts are stainless steel 303. Bearings are made of high ...
    12vdc Learn More
  2. 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...
  3. 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...
  4. Oberdorfer Pumps

    Magnetic Drive Pump

    SM1031BCM

    $3,889.20
    Designed to handle highly corrosive liquids that must be pumped under pressure. The Chemsteel pump prevents system contamination while maintaining the purity and integrity of the liquid being pumped. Key attributes include:

    Slotted bearings to...

  5. PumpBiz

    WOBBLE STATOR PUMP & 3 phase MOTOR

    APM-44CSFM-3

    $3,821.55
    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 dou...
  6. Pulsafeeder

    115V digital metering pump 192 GPD/50 PSI

    LMK7KA-WTC3

    $2,034.00
    Chemical metering injection pump. True microprossor controled instrument for precise and accurate metering control. 190GPD / 7.9GPH flow max. Packed with standard features, it includes automatic control via 4-20mA or 20-4mA inputs, external pace ...
  7. Pulsafeeder

    115V digital metering pump 192 GPD/50 PSI

    LMK7KA-PTC3

    $2,034.00
    Chemical metering injection pump. True microprossor controled instrument for precise and accurate metering control. 190GPD / 7.9GPH flow max. Packed with standard features, it includes automatic control via 4-20mA or 20-4mA inputs, external pace ...
  8. Oberdorfer Pumps

    3/4" Bronze gear pump 1HP

    N970H-N47

    $2,394.00
    3/4" Bronze rotary gear pump without relief valve and close coupled to a 1 HP 115v/1/60 1725 RPM TEFC motor.Pump housings and gears are made of top quality bronze, shafts are stainless steel 303. Bearings are made of high performance carbon-gra...
    115/230v ODP 1HP Learn More
  9. Oberdorfer Pumps

    N994 Gear Pump & Motor

    N994H-J46

    $2,040.00
    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 posit...

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

    Hot Oil Gear Pump

    NG7V

    $2,168.60

    NG NSF Listed Industrial Gear Pumps. OBSOLET

    Gear pumps are recommended for non-abrasive, non-flammable liquids compatible with pump component materials. They can be used for liquid circulation, lubrication, pressure boosting, filtering, medium p...

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