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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. Hypro GCCV33V Gear Pump 3/8" Cast Iron Motor Mounted with Relief Valve

    Hypro Pumps

    Cast Iron Motor Mounted with Relief Valve

    GCCV33V
    $1,003.00
    Cast Iron Gear pump close coupled to a 1/2 hp Carbonator type motor. Steel spur gears with steel shaft and CI shaft supports. Standard pressure relief valves that can be ported internally or externallyand adjusted.

    Shertech self-priming, posit...

    1/2HP 115/230v Learn More
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  2. Aquatec 5513-1E12-B606 5 chamber diaphragm pump

    Aquatec Pumps

    5 chamber diaphragm pump

    5513-1E12-B606
    $290.54
    550 Series Super Flow Pump: 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 designed t...

    115v Learn More
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  3. Aquatec 5501-1E12-B526 5 chamber diaphragm pump

    Aquatec Pumps

    5 chamber diaphragm pump

    5501-1E12-B526
    $290.54
    Demand Pump: 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 designed to operate intermit...

    3GPM 60psi 115v Learn More
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  4. Aquatec 5512-1E12-J586 5 chamber diaphragm pump

    Aquatec Pumps

    5 chamber diaphragm pump

    5512-1E12-J586
    $290.54
    550 Series Super Flow Pump: 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 designed to o...

    Learn More
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  5. Oberdorfer N991M-J07 N991 Gear PUMP motor

    Oberdorfer Pumps

    N991 Gear PUMP & motor

    N991M-J07
    $1,692.60
    Gear PUMP & motor. 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 a...

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  6. Oberdorfer N994J-W45 N994 Gear Pump Mtr.

    Oberdorfer Pumps

    N994 Gear Pump & Mtr.

    N994J-W45
    $2,593.50
    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 pos...

    2HP 115/230 Learn More
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  7. Aquatec 5511-1C12-J576 5 chamber diaphragm pump

    Aquatec Pumps

    5 chamber diaphragm pump

    5511-1C12-J576
    $290.54
    550 Series Super Flow Pump: Reverse Osmosis System Pump, High Powered RO/DI Reverse Osmosis Pump

    OPERATION: The 550 pumps can draw water from a holding tank and pressurize it, or boost the pressure from a low pressure source. It is designed to op...

    Learn More
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  8. Aquatec 5513-1C01-J586 5 chamber diaphragm pump

    Aquatec Pumps

    5 chamber diaphragm pump

    5513-1C01-J586
    $290.54
    550 Series Super Flow Pump: Reverse Osmosis System Pump, High Powered RO/DI Reverse Osmosis Pump

    OPERATION: The 550 pumps can draw water from a holding tank and pressurize it, or boost the pressure from a low pressure source. It is designed to op...

    Learn More
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  9. Aquatec 5502-2GC1-B526 Demand Pump 5 chamber diaphragm pump

    Aquatec Pumps

    5 chamber diaphragm pump

    5502-2GC1-B526
    $290.54

    Demand Pump: Spraying, Ag and cleaning solutions. FKM seals.

    OPERATION: The 550 pumps can draw water from a holding tank and pressurize it, or boost the pressure from a low pressure source. It is designed to operate intermittently, but most versi...

    4GPM 80PSI 115v Learn More
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  10. oberdorfer gear pump bronze N994RH-N26

    Oberdorfer Pumps

    N994 Gear Pump & Motor w/Relief Valve

    N994RH-N26
    $3,432.00

    Gear Pump, Oberdorfer.

    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...

    1HP 115/230v 1/2" Learn More
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