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Rotary Pumps - Gear, Flexible Impeller, Screw

These pumps have a set of rotating gears, flexible impellers, screw rotor or vanes connected to a driven shaft. Therefore most of these pumps incorporate a mechanical seal, packing or lip seal along the shaft at its back end in order to keep the fluid from leaking along the shaft. There are a few models, which are magnetically coupled and thus seal-less. Another type which is seal-less is the Peristaltic which uses a rotating roller assembly to compress a hose over a given arc length. These pumps are very reliable in pumping medium to thick liquids which typically are not handled by Centrifugal pumps and in applications where medium to high discharge pressures are needed at low flow rates. Varying the motor speed easily controls their output. Most units include some sort of built in relief valve, but those that do not must have one installed into the piping to prevent a dangerous over pressure condition. Not recommended for liquids with fine abrasives or thin non-lubricating liquids like water that will accelerate pump wear.Typical Positive Displacement Rotary pumps include helical gear, spur gear, lobe, progressive cavity, peristaltic, flexible impeller and sliding vane to name a few.
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  1. Oberdorfer N990J-T47 Bronze Rotary Gear Pump w/ motor

    Oberdorfer Pumps

    Bronze Rotary Gear Pump 1"

    N990H-T47
    $2,068.00

    1" Close coupled bronze rotary gear pump with motor. 1.5HP

    • 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 mo...
    1-1/2HP 115/230v 1" Learn More
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  2. Oberdorfer N993 Pump motor

    Oberdorfer Pumps

    N993 Pump & motor 12VDC

    N993-C81
    $1,395.00

    12VDC gear 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.

    12 volt Gear pumps ar...

    12VDC Learn More
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  3. oberdorfer 405m rubber impeller pump

    Oberdorfer Pumps

    Rubber Impeller Bronze Pump

    405M-04M35
    $1,616.00

    Oberdorfer rubber (flex) impeller pump with solid cast bronze housing. Close coupled Rubber Impeller Pumps are made of high quality bronze for maximum corrosion resistance. The rubber impeller is mounted on a separate stainless steel shaft which i...

    115v 3/4HP 1" TEFC Learn More
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  4. Oberdorfer N990J-T47 Bronze Rotary Gear Pump w/ motor

    Oberdorfer Pumps

    Bronze Rotary Gear Pump w/ motor

    N990J-T47
    $1,871.00

    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...
    1-1/2HP 115/230v 1" Learn More
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  5. PumpBiz APM-44CSFM-3 WOBBLE STATOR PUMP 3 phase MOTOR

    PumpBiz

    WOBBLE STATOR PUMP & 3 phase MOTOR

    APM-44CSFM-3
    $3,821.55
    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 dou...
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  6. Hypro GMCV2VA3 Cast Iron Gear pump 1/4

    Hypro Pumps

    Cast Iron Gear pump 1/4"

    GMCV2VA33T
    $2,131.57

    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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  7. Flojet 4300-500 12vdc Diaphragm Demand Pump

    Flojet Pumps

    12vdc Diaphragm Demand Pump

    4300-500
    $239.00
    Industrial QUAD pump - Developed to deliver higher flows up to 5 GPM using a four piston design with excellent self-priming capability. 04300-500A Built-in pressure switch automatically starts and stops pump at its 45 PSI setting.

    Santoprene diap...

    12 Volt Learn More
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  8. Diaphragm Demand Pump

    Flojet Pumps

    Diaphragm Demand Pump

    4300-042
    $237.00
    Industrial QUAD pump - Developed to deliver higher flows up to 5 GPM using a four piston design with excellent self-priming capability. 04300-042A Built-in pressure switch automatically starts and stops pump at its 45 PSI setting.

    Santoprene...

    115v 3gpm FKM 40psi Learn More
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  9. Flojet 4300-529A 115v Dia. Pump w/Switch

    Flojet Pumps

    115v Dia. Pump w/Switch

    4300-529A
    $589.00
    Commercial Duty - Developed to deliver higher flows up to 3.3 GPM using a four piston design with excellent self-priming capability. Built-in pressure switch automatically starts and stops pump at its 30 PSI setting. Motor is a Induction motor fo...
    Continuous Duty FKM Induction motor Learn More
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  10. Flojet 4300-531A 115v Dia. Pump w/Switch

    Flojet Pumps

    115v Dia. Pump w/Switch

    4300-531A
    $579.00
    Commercial Duty - Developed to deliver higher flows up to 3 GPM using a four piston design with excellent self-priming capability. Built-in pressure switch automatically starts and stops pump at its 30 PSI setting. Motor is a continuous duty PSC,...
    Continuous Duty Santo Learn More
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