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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

    Bronze Rotary Gear Pump 1"

    N990H-T47

    $2,068.00

    1" Close coupled bronze rotary gear pump with motor. 1.5HP

    • 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 mo...
    1-1/2HP 115/230v 1" Learn More
  2. 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
  3. AMT Pumps

    2" Electric Diaphragm Trash Pump

    338E-96

    $3,140.00

    New model 338E-96 Powered by 1.5HP electric motor. AMT 2" Diaphragm pumps features 2-stage, 44 to 1 gear reduction with a large diameter output gear and heavy duty ball bearing construction. ALSO AVAILABLE IN 1-PHASE,115/230V Often referred to as ...

    1.5HP 115/230v Learn More
  4. Oberdorfer Pumps

    1.25" Bronze gear pump

    N1100W-T98

    $2,159.00
    1 1/4" Bronze rotary gear pump with relief valve and close coupled to a 1 1/2 HP TEFC motor.

    Use to pump oil and other viscous thick liquids, De-icing fluids.

    1.5HP 230/460v Learn More
  5. AMT Pumps

    3" Electric Diaphragm Pump

    337E-96

    20% Off Special Price $2,702.40 Regular Price $3,378.00

    Electric Diaphragm water pumps features 2-stage, 44 to 1 gear reduction with a large diameter output gear and heavy duty ball bearing construction. Often referred to as Mud pumps or Sludge pumps, diaphragm trash pumps are designed to pump mud, slu...

    1.5HP 115/230v Learn More
  6. AMT Pumps

    3" Electric Diaphragm Pump

    337T-96

    20% Off Special Price $2,702.40 Regular Price $3,378.00

    Electric Diaphragm water pumps features 2-stage, 44 to 1 gear reduction with a large diameter output gear and heavy duty ball bearing construction. Often referred to as Mud pumps or Sludge pumps, diaphragm trash pumps are designed to pump mud, slu...

    1.5HP 3 Phase Electric Learn More
  7. PumpBiz

    WOBBLE STATOR PUMP & 3 PHASE MOTOR

    APM-67CSQM-3

    $4,655.67
    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...
  8. PumpBiz

    WOBBLE STATOR PUMP & 3 phase MOTOR

    APM-67CSBM-3

    $5,406.59
    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...
  9. PumpBiz

    WOBBLE STATOR PUMP & 3 phase MOTOR

    APM-67CSFM-3

    $7,040.34
    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...
  10. PumpBiz

    WOBBLE STATOR PUMP & 3 phase MOTOR

    APM-67SSQM-3

    $8,745.12
    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...
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