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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 N991-32 gear pump bronze pump end only

    Oberdorfer Pumps

    N991 Bronze gear pump PEO

    N991-32
    $538.20
    Bronze gear pump . 3/8" 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 pu...

    NO motor 3/8" Learn More
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  2. Aquatec 5512-1E01-B636 5 chamber diaphragm pump

    Aquatec Pumps

    5 chamber diaphragm pump

    5512-1E01-B636
    $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...

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  3. Hypro C3K Pedestal Gear Pump Gear Pump

    Hypro Pumps

    Gear Pump

    C3K
    $486.12
    CI Pedestal Gear Pump. Self-priming, positive displacement, external rotary gear pumps are ideal for a wide range of light-duty industrial, marine, agricultural, and commercial applications, providing a nearly pulseless flow and are designed spec...
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  4. Gear Pump

    Hypro Pumps

    Gear Pump

    C3V
    $486.12
    CI Pedestal Gear Pump. Self-priming, positive displacement, external rotary gear pumps are ideal for a wide range of light-duty industrial, marine, agricultural, and commercial applications, providing a nearly pulseless flow and are designed ...
    Cast Iron 3/8" Learn More
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  5. 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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  6. Hypro GMSV6C7T 316 Stainless Steel Gear pump

    Hypro Pumps

    316 Stainless Steel Gear pump

    GMSV6C7T
    $1,959.63

    Rotary Gear pump with motor. 316 Stainless construction, Ryton gears. 

    Gear pumps are positive displacement pumps. Each shaft revolution displaces a definite amount of liquid relatively unaffected by the back pressure in the discharge line. Shaft...

    3HP 230V TEFC Learn More
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  7. 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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  8. 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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  9. 316 Stainless Steel Gear pump

    Hypro Pumps

    316 Stainless Steel Gear pump

    GMSV6C3T
    $1,799.44

    Rotary Gear pump with motor. 316 Stainless construction, Ryton gears.

    Use for pressure spraying, circulation of lubricants, tank / drum filling. Will handle water like liquids to very thick. Bi-rotational allows for flow direction reversal. Flush...

    3HP 230/460V TEFC Learn More
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  10. 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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