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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 N61010GR-01F02 Bronze Rotary Gear Pump Motor R

    Oberdorfer Pumps

    Bronze Rotary Gear Pump & Motor R

    N61010GR-01F02
    $677.30
    PUMP AND MOTOR with 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 shaft s...

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  2. Oberdorfer N990J-T45 Bronze Rotary Gear Pump w/ motor

    Oberdorfer Pumps

    Bronze Rotary Gear Pump w/ motor

    N990J-T45
    $2,999.10
    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...
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  3. Oberdorfer N990K-Y45 Bronze Rotary Gear Pump w/ motor

    Oberdorfer Pumps

    Bronze Rotary Gear Pump w/ motor

    N990K-Y45
    $3,103.10
    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 shaft by ...
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  4. Oberdorfer N990RJ-T45 Bronze Rotary Gear Pump w/ motor relief valve

    Oberdorfer Pumps

    Bronze Rotary Gear Pump w/ motor & relief valve

    N990RJ-T45
    $3,081.00
    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...
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  5. Hypro GMCV2VA3 Cast Iron Gear pump 1/4

    Hypro Pumps

    Cast Iron Gear pump 1/4"

    GMCV2VA3
    $1,230.00

    Rotary Cast Iron Gear pump end. 303 SS fasteners, steel gears.

    Adjustable relief valve designed for internal pressure relief, can be ported for either internal or external discharge. Do not operate the relief valve for more than one minute.

    Hypr...

    3/4HP 115/230v ODP 1/4" Learn More
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  6. Aquatec 5850-7E12-J574 115v Electric diaphragm pump

    Aquatec Pumps

    115v Electric diaphragm pump

    5850-7E12-J574
    $281.78
    Electric diaphragm pump. These pumps are specifically designed for mobile low flow or low voltage applications such as Expreso coffee, water systems, ice makers, pesticides and fertilizers. Pressure switch set at 60 PSI. Connections are 3/8 " Joh...
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  7. Aquatec 5513-1E12-B706 5 chamber diaphragm pump 230

    Aquatec Pumps

    5 chamber diaphragm pump 230V

    5513-1E12-B706
    $290.54
    550 Series Super Flow Pump: 230V Reverse Osmosis System Pump, High Powered RO / DI Reverse Osmosis Pump

    OPERATION: The 550 pumps can draw water from a holding tank and pressurizeit, or boost the pressure from a low pressure source. It is desig...

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  8. Aquatec 5503-1FE1-B706 5 chamber diaphragm pump 230

    Aquatec Pumps

    5 chamber diaphragm pump 230

    5503-1FE1-B706
    $289.08
    550 Series Super Flow Pump: Reverse Osmosis System Pump, High Powered RO / DI Reverse Osmosis Pump. Quad QD ports. Order fittings seperately.

    OPERATION: The 550 pumps can draw water from a holding tank and pressurizeit, or boost the pressure from...

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