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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. 3/4" Bronze gear pump 1HP

    Oberdorfer Pumps

    3/4" Bronze gear pump 1HP

    N970RH-N26
    $5,003.27
    3/4" Bronze rotary gear pump with relief valve and close coupled to a 1 HP 115v/1/60 1725 RPM TEFC motor.Pump housings and gears are made of top quality bronze, shafts are stainless steel 303. Bearings are made of high performance carbon-grap...
    115/230v ODP Relief Valve Learn More
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  2. Oberdorfer N993Q-J46 Bronze gear pump

    Oberdorfer Pumps

    Bronze gear pump

    N993Q-J46
    $2,273.70
    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 positive displac...

    1/2HP 115/230v Learn More
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  3. Oberdorfer 406MK-04N26 406M Macerator Pump

    Oberdorfer Pumps

    406M Macerator Pump

    406MK-04N26
    $2,869.10
    Sewage transfer macerator chopper pump w/rubber impeller. Portable all bronze construction. Includes vacuum switch to help prevent dry running.
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  4. Dual Head Adjustable mechanical feed rate 100GPD

    Stenner

    Dual Head Adjustable mechanical feed rate 100GPD

    100DM5
    $735.00
    G.H. Stenner & Company offers a complete line of highly reliable peristalic chemical feeders. Use for grease trap enzymes, algaecide, biocide, biocidal, antimicrobial, chlorination - chlorine sanitizers and disinfectants injection, cooling to...
    5-100GPD Learn More
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  5. Aquatec 5503-1FE1-J526 5 chamber diaphragm pump

    Aquatec Pumps

    5 chamber diaphragm pump

    5503-1FE1-J526
    $289.08
    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...

    5GPM 70PSI 115v Learn More
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  6. Aquatec_550 pump

    Aquatec Pumps

    24VDC diaphragm pump

    5510-1A12-B726
    $290.54
    24VDC DDP550 Series Super Flow Pump: Reverse Osmosis System Pump, High Powered RO / DI Reverse Osmosis Pump. Coolant pump on Do-All CNC saws.

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

    24VDC Learn More
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  7. Aquatec 5513-1E12-J526 5 chamber diaphragm pump

    Aquatec Pumps

    5 chamber diaphragm pump

    5513-1E12-J526
    $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 5GPM 60psi Learn More
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  8. Aquatec 5513-1E12-J606 5 chamber diaphragm pump

    Aquatec Pumps

    5 chamber diaphragm pump

    5513-1E12-J606
    $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...

    115v 6GPM 60psi Learn More
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  9. Aquatec 5501-2D01-N526 5 chamber diaphragm pump

    Aquatec Pumps

    5 chamber diaphragm pump

    5501-2D01-N526
    $290.54
    550 Series Super Flow Pump: Great for water, paints, wine, soap and other liquids.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 intermitte...
    3GPM 50PSI 115v Learn More
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  10. Hypro GCCV22V Gear Pump 1/4" Cast Iron Motor Mounted Gear Pump

    Hypro Pumps

    Cast Iron Motor Mounted Gear Pump

    GCCV22V
    $999.00
    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, positive...

    115v CI Learn More
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