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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. Graco Pumps

    115v Electric APEX Oil Transfer pump

    260109 (TP32-15)

    $620.00

    The PBL oil transfer pumps are designed specifically to transfer bulk oils and hydraulic fluids, motor oil, antifreeze. Larger horsepower electric motors with a smaller displacement gear pump assure adequate power to pump viscous fluids at low ...

    115V- 7.9gpm Learn More
  2. PumpBiz

    WOBBLE STATOR PUMP & 3 phase MOTOR

    APM-56CSQM-3

    $3,148.20
    Liberty Pumps are backed by over fifty years of progressive cavity pump product sales and technical service experience. American Pump Series Progressive Cavity Pumps are designed with a singular helical rotor that eccentrically turns within a d...
  3. Oberdorfer Pumps

    1.25" Bronze gear pump

    N1100XN46

    $3,655.00
    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
  4. Oberdorfer Pumps

    3/4" Bronze gear pump 1HP

    N970H-N47

    $2,394.00
    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
  5. Oberdorfer Pumps

    3/4" Bronze gear pump 1HP

    N970RH-N26

    $1,583.00
    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-graphite...
    115/230v ODP Relief Valve Learn More
  6. Oberdorfer Pumps

    406M Macerator Pump

    406MK-04N26

    $2,207.00
    Sewage transfer macerator chopper pump w/rubber impeller. Portable all bronze construction. Includes vacuum switch to help prevent dry running.
  7. Oberdorfer Pumps

    N994 Gear Pump & Mtr.

    N994R-N75

    $1,422.00
    Gear Pump. 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 posit...

    12VDC Learn More
  8. Oberdorfer Pumps

    Bronze Rotary Gear Pump w/ motor & relief valve

    N990RH-N26

    $1,889.00
    Oberdorfer Close coupled bronze rotary gear pumps.
    • Bronze Construction with SS shaft
    • Helical gears for quiet operation
    • Self-lubricating carbon bearings
    • O-ring seal for max. leak protection
    • The pump drive shaft is connected to the motor shaft by ...
  9. Hypro Pumps

    Bronze Gear pump 1HP

    GMBN3VA43

    $2,272.75
    Rotary Gear pump 3/8". 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 pre...

    3/8" 3phase ODP Learn More
  10. Oberdorfer Pumps

    Bronze Rotary Gear Pump w/ motor & relief valve

    N990RH-N76

    $2,697.00
    Oberdorfer Close coupled bronze rotary gear pumps.
    • Bronze Construction with SS shaft
    • Helical gears for quiet operation
    • Self-lubricating carbon bearings
    • O-ring seal for max. leak protection
    • The pump drive shaft is connected to the motor shaf...
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