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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 N991R-32 N991 Bronze gear pump PEO

    Oberdorfer Pumps

    N991 Bronze gear pump PEO

    N991R-32
    $596.70

    Bronze gear pump

    NO motor. 1/4" Pump housings and gears are made of top quality bronze; shafts are from stainless steel 303. Include relief valve built in. Bearings are designed of high performance carbon-graphite material selected for wear resis...

    Pump End ONLY Learn More
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  2. Oberdorfer N992 N992 Gear Pump PEO

    Oberdorfer Pumps

    N992 Gear Pump PEO

    N992
    $825.57

    Gear Pump pump end only, 1/4". 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. Incl...

    3/8" Bronze Pump Only Learn More
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  3. Oberdorfer N13HDM 1.5 Bronze gear pump

    Oberdorfer Pumps

    1.5" Bronze gear pump

    N13HDM
    $3,200.00
    1.5" Bronze rotary gear pump without relief valve. Pedestal mount pump only. Upper drive shaft location. See performance graph for flow rates vs motor RPM and HP. If used above 900 RPM, then duty cycle is limited to intermittent.
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  4. Oberdorfer N1100XN46 1.25 Bronze gear pump

    Oberdorfer Pumps

    1.25" Bronze gear pump

    N1100XN46
    $4,751.50
    1 1/4" Bronze rotary gear pump with relief valve and close coupled to a 1 HP ODP motor.

    Use to pump oil and other viscous thick liquids.

    1HP 115/230v ODP Learn More
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  5. Oberdorfer N1100 1.25 Bronze gear pump PEO

    Oberdorfer Pumps

    1.25" Bronze gear pump PEO

    N1100
    $2,470.00
    1 1/4" Bronze rotary gear pump with relief valve and to be close coupled to a 1 HP 56C to 3HP 182TC motors of electric or hydraulic type.

    Use to pump oil and other viscous thick liquids as well as diesel and all the de-icing fluids. Uses suc...

    NO motor Learn More
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  6. Oberdorfer N26HDM 2 Bronze gear pump

    Oberdorfer Pumps

    2" Bronze gear pump

    N26HDM
    $6,488.30
    Long coupled gear pump made of cast bronze. If used above 900 RPM with non-lubricating fluid, then duty cycle is limited to intermittent.

    Continuous duty on lubricating liquids like oils. Use slower speed motor at lower flow rates for water an...

    up to 170GPM Learn More
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  7. Oberdorfer N970H-N47 3/4 Bronze gear pump 1HP

    Oberdorfer Pumps

    3/4" Bronze gear pump 1HP

    N970H-N47
    $4,637.18
    3/4" Bronze rotary gear pump without 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-gra...
    115/230v ODP 1HP Learn More
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  8. 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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  9. 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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  10. 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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