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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. Bronze Cooling Gear Pump w/ relief valve

    Oberdorfer Pumps

    Bronze Cooling Gear Pump w/ relief valve

    N1000R-66
    $585.00
    Water-cooled induction heating systems / machine cooling Pump. Bronze Pedestal Gear pump with relief valve. Often used as a coolant pump Ameritherm, Dynaflux. Pump flow is reversible.
    • Gear pumps are positive displacement pumps. Each shaft re...
    Water-cooled induction heating systems / machine cooling Pump. Bronze Pedestal Gear pump with relief valve. Often used as a coolant pump Ameritherm, Dynaflux. Pump flow is reversible.
    • 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 speed and flow are directly proportional.
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  2. 12vdc Cast Iron Gear pump battery dc hypro shertech GMCV

    Hypro Pumps

    12V DC Cast Iron Gear pump

    GMCV4VA-12
    $1,253.00

    12 volt 12v DC Rotary Cast Iron Gear pump. 303 SS fasteners, steel gears. Battery powered self priming heavy duty gear pump.

    Adjustable relief valve designed for internal pressure relief, can be ported for either internal or external discharge. D...

    12vdc 1HP Learn More
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  3. marco mate gear pump 12v up14

    Marco Mate

    Oil Transfer Pump UP6

    M164-080-12
    $299.00

    12v DC Oil transfer gear pump. GPM Self-priming electric pump with helical bronze gears for transferring lubricating oils and viscous liquids. Nickel-plated brass body and stainless steel shaft. Particularly suitable for draining engine sumps wit...

    4gpm 290GPH 12v Learn More
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  4. Hypro GMBN6VA Rotary Gear pump only sherflo shertech motor mount

    Hypro Pumps

    Bronze Gear pump only

    GMBN6V
    $1,051.82
    Rotary Gear pump end. 303 SS fasteners, Ryton gears.

    Adjustable relief valve designed for internal pressure relief, can be ported for either internal or external discharge. Do not operate the relief valve for more than one minute.

    Use for pres...

    No motor Learn More
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  5. Oberdorfer - N4000LR

    Oberdorfer Pumps

    Bronze Pedestal Gear Pump W Relief Valve

    N4000LRS3
    $911.30

    Bronze Pedestal Gear Pump With Relief Valve. Bronze Pedestal Gear pump. Often used as a oil pump on large ships to pre-lube the bearings, Chillers (Dynaflux) often used with welders. See performance chart for motor speed VS HP VS performance.

    • G...
    1/2" w/ relief valve Learn More
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  6. Hypro GMCV5VA6 Cast Iron Gear pump

    Hypro Pumps

    Cast Iron Gear pump

    GMCV5VA6
    $1,244.00
    Rotary Cast Iron Gear pump with electric motor. 303 SS fasteners, steel gears.

    Adjustable relief valve designed for internal pressure relief, can be ported for either internal or external discharge. Do not operate the relief valve for more than...

    2HP 115/230v ODP 3/4" Learn More
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  7. Dual Head Adjustable mechanical feed rate 120GPD

    Stenner

    Dual Head Adjustable mechanical feed rate 170GPD

    170DM5
    $699.00
    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 towe...
    8.5-170.GPD Learn More
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  8. Oberdorfer N4000L Bronze Pedestal Gear Pump

    Oberdorfer Pumps

    Bronze Pedestal Gear Pump

    N4000RS3
    $1,357.20
    Bronze Pedestal Gear pump. Often used as a oil pump on large ships to pre-lube the bearings. See performance chart for motor speed VS HP VS performance.
    • Gear pumps are positive displacement pumps. Each shaft revolution displaces a definite a...
    1/2" Learn More
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  9. Hypro GMCV2VA3 Cast Iron Gear pump 1/4

    Hypro Pumps

    Cast Iron Gear pump 1/4"

    GMCV2VA33T
    $1,123.00

    Rotary Cast Iron Gear pump with electric motor. 303 SS fasteners, steel gears.

    Adjustable relief valve designed for internal pressure relief, can be ported for either internal or external discharge. Do not operate the relief valve for more than o...

    3/4HP 230/460v TEFC 1/4" Learn More
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  10. Oberdorfer N993R N993 bronze Gear pump

    Oberdorfer Pumps

    3/8 bronze Gear pump

    N993R-03
    $1,259.70
    Pump Only PEO, no 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 pu...

    Pump Only PEO, Relief 3/8" ports Learn More
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