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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. Aquatec 5511-1E12-V726 5 chamber diaphragm pump

    Aquatec Pumps

    5 chamber diaphragm pump

    5511-1E12-V726
    $705.18
    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...

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  2. 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...

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  3. 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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  4. oberdorfer gear pump bronze

    Oberdorfer Pumps

    N994 Gear Pump & Motor

    N994H-J46
    $2,652.00

    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...

    1/2HP 115/230v 1/2" Learn More
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  5. Aquatec 5510-1D01-B636 5 chamber diaphragm pump 12v

    Aquatec Pumps

    5 chamber diaphragm pump 12v

    5510-1D01-B636
    $290.54
    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 intermittently, but most versions can run continuously for several hour intervals.It can be ...
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  6. 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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  7. Oberdorfer N994-37 N994 Gear Pump w/brkt

    Oberdorfer Pumps

    N994 Gear Pump w/brkt

    N994-37
    $1,717.30
    Gear Pump. Pump housings and gears are made of top quality bronze; shafts are from stainless steel 303. Gear Pump KIT. Bearings are designed of high performance carbon-graphite material selected for wear resistance and long service life.

    Gea...

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  8. Hot Oil Gear Pump

    Hypro Pumps

    Hot Oil Gear Pump

    NG7V
    $3,802.32

    NG NSF Listed Industrial Gear Pump (OBSOLETE)

    The Hypro NG7V industrial gear pump is designed for non-abrasive, non-flammable liquids that are compatible with pump component materials. Ideal for fluid circulation, lubrication, pressure boosting, ...

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  9. Aquatec 5853-GB12-V81D Variable sp / constant PSI 115v

    Aquatec Pumps

    Variable sp / constant PSI 115v

    5853-GB12-V81D
    $405.88
    Variable speed, constant pressure pumps. These pumps integrate a state-of-the-art digital controller. This unique intelligent controller makes the pumps able to maintain a constant pressure (within 2 PSI) for variable flow rates throughout thei...
    115v 1.2gpm 40 / 65psi Learn More
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  10. Aquatec 5853-GE12-V81D Variable sp / constant PSI 115v

    Aquatec Pumps

    Variable sp / constant PSI 115v

    5853-GE12-V81D
    $405.88

    Variable speed, constant pressure pumps. These pumps integrate a state-of-the-art digital controller. This unique intelligent controller makes the pumps able to maintain a constant pressure (within 2 PSI) for variable flow rates throughout their o...

    1.2gpm 60 / 65psi 115v Learn More
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