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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

    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...
  2. Oberdorfer Pumps

    Bronze Pedestal Gear Pump

    N9000E

    $849.15
    Bronze Pedestal Gear pump. Often used as a oil pump on large ships to pre-lube the bearings.
    • Gear pumps are positive displacement pumps. Each shaft revolution displaces a definite amount of liquid relatively unaffected by the backpressure in the...
  3. Oberdorfer Pumps

    Bronze Pedestal Gear Pump

    N9000L

    $849.15
    Bronze Pedestal Gear pump. Often used as a oil pump on large ships to pre-lube the bearings.
    • Gear pumps are positive displacement pumps. Each shaft revolution displaces a definite amount of liquid relatively unaffected by the backpressure in the...
  4. Oberdorfer Pumps

    Bronze Pedestal Gear Pump

    N9000LS15

    $959.85
    Bronze Pedestal Gear pump with relief valve. Often used as a oil pump on large ships to pre-lube the bearings.
    • Gear pumps are positive displacement pumps. Each shaft revolution displaces a definite amount of liquid relatively unaffected by the b...
  5. Oberdorfer Pumps

    Bronze Pedestal Gear Pump

    N9000LS3

    $861.84
    Bronze Pedestal Gear pump with relief valve. Often used as a oil pump on large ships to pre-lube the bearings.
    • Gear pumps are positive displacement pumps. Each shaft revolution displaces a definite amount of liquid relatively unaffected by the b...
  6. Oberdorfer Pumps

    Gear Pump & 12VDC Motor

    N992Q-01F94

    $1,626.90
    12V DC Gear Pump with housings and gears are made of top quality bronze; shafts are from stainless steel 303. Continuous Duty gear pump fitted with 12V DC motor. Bearings are designed of high performance carbon-graphite material selected for we...
    1/3HP 12V DC REVERSIBLE Learn More
  7. 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
  8. 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
  9. Oberdorfer Pumps

    Bronze Pedestal Gear Pump

    N9000S18

    $1,188.00
    Bronze Pedestal Gear pump. Often used as a oil pump on large ships to pre-lube the bearings.
    • Gear pumps are positive displacement pumps. Each shaft revolution displaces a definite amount of liquid relatively unaffected by the backpressure in...
  10. Oberdorfer Pumps

    Bronze Pedestal Gear Pump 1"

    N9000S3

    $871.00
    Bronze Pedestal Gear pump. Often used as a oil pump on large ships to pre-lube the bearings.
    • Gear pumps are positive displacement pumps. Each shaft revolution displaces a definite amount of liquid relatively unaffected by the backpressure in...
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