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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. Pulsafeeder

    METERING PUMP 44GPD/100 PSI

    LPE4MA-PTC1

    $1,436.40
    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...
  2. Oberdorfer Pumps

    Bronze Pedestal Gear Pump w/ relief valve

    N9000RS17

    $1,068.00
    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...
    FKM Mechanical seal Learn More
  3. Oberdorfer Pumps

    Bronze Pedestal Gear Pump w/ relief valve

    N7000R

    $1,044.00
    Bronze Pedestal Gear pump with relief valve. Often used as a oil pump on large ships to pre-lube the bearings. Pump flow is reversible.
    • Gear pumps are positive displacement pumps. Each shaft revolution displaces a definite amount of liquid...
    3/4" Packed Learn More
  4. Oberdorfer Pumps

    Bronze Rotary Gear Pump & Motor

    N61K10G-01F02

    $555.00
    PUMP AND MOTOR. No relief valve.

    This Bronze Rotary Gear Pump is popular among OEM users. It is a diesel fuel transfer pump featuring an all bronze design and 303 stainless steel shafts with options of non-metallic gears and a variety of sha...

  5. Oberdorfer Pumps

    Bronze Rotary Gear Pump PEO

    N990

    $1,000.00
    Oberdorfer Close coupled bronze rotary gear pump end only.
    • Bronze Construction with SS shaft
    • Helical gears for quiet operation
    • Self-lubricating carbon bearings
    • O-ring seal for max. leak protection
    • Pump End Only (Motor Not Included)
    pump only Learn More
  6. Pulsafeeder

    Metering Pump 6 GPD/150 PSI

    LPA2SA-PTC1

    $928.53
    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. Oberdorfer Pumps

    Bronze Rotary Gear Pump PEO w/ brkt & relief valve

    N990-37R

    $1,200.00
    Oberdorfer Close coupled bronze rotary gear pump end only w/ brkt & relief valve.
    • Bronze Construction with SS shaft
    • Helical gears for quiet operation
    • Self-lubricating carbon bearings
    • O-ring seal for max. leak protection
    • Pump End Only (Motor Not ...
  8. Oberdorfer Pumps

    Bronze Rotary Gear Pump PEO w/ brkt, clutch, & relief valve

    N990R-38

    $1,267.00
    Oberdorfer Close coupled bronze rotary gear pump end only. includes 12V clutch, brkt, and relief valve..
    • Bronze Construction with SS shaft
    • Helical gears for quiet operation
    • Self-lubricating carbon bearings
    • O-ring seal for max. leak protection
    • Pu...
  9. Oberdorfer Pumps

    Bronze Rotary Gear Pump PEO w/ relief valve

    N990R

    $843.00
    Oberdorfer Close coupled bronze rotary gear pump end only w/ relief valve
    • Bronze Construction with SS shaft
    • Helical gears for quiet operation
    • Self-lubricating carbon bearings
    • O-ring seal for max. leak protection
    • Pump End Only (Motor Not In...
  10. Pulsafeeder

    Chemical Metering Pump

    LB04SA-PTC1

    $1,291.08
    Chemical metering pump. 25GPD The 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 noise - ideal f...
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