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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 N991-32F41 N991 Oberdorfer Bronze gear pump motor

    Oberdorfer Pumps

    N991 Oberdorfer Bronze gear pump & motor

    N991-32F41
    $1,108.90
    Oberdorfer Bronze gear pump & motor. 3/8" 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 ser...
    115v 3/8" Learn More
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  2. Oberdorfer N991-F41 N991 Oberdorfer PUMP MTR.

    Oberdorfer Pumps

    N991 Oberdorfer PUMP & MTR.

    N991-F41
    $1,446.90
    Glycol circulation Pump by Oberdorfer is just one of hundreds of applications. 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 selec...
    1/3HP 115 Learn More
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  3. Graco OP12 12v Electric Oil Transfer 260116

    Graco Pumps

    12v Electric Oil Transfer 260116

    OP12
    $963.00

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

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  4. PBL_Oil.jpg

    Graco Pumps

    230v Electric APEX Oil Transfer pump

    260104
    Call For Price

    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 ...

    230V - 4.25gpm. This pump has been discontinued. Please see the list of related products for a replacement Learn More
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  5. Graco 260109 (TP32-15) 115v Electric APEX Oil Transfer pump

    Graco Pumps

    115v Electric APEX Oil Transfer pump

    260109 (TP32-15)
    $1,200.00

    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 This model is obsolete and is replaced with 25U346 Learn More
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  6. graco_260106.jpg

    Graco Pumps

    115v Electric APEX Oil Transfer pump

    260108 (TP16-15)
    Call For Price

    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- 4.2gpm Learn More
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  7. Graco 260106 (TP9-15) 115v Electric APEX Oil Transfer pump

    Graco Pumps

    115v Electric APEX Oil Transfer pump

    260106 (TP9-15)
    $628.00

    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- 3gpm Learn More
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  8. Graco 260105 (TP8-15) 115v Electric APEX Oil Transfer pump wall mount unit

    Graco Pumps

    115v Electric APEX Oil Transfer pump wall mount unit

    260105 (TP8-15)
    $633.00

    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- 3gpm Learn More
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  9. Oberdorfer N993C-M26 Bronze gear pump

    Oberdorfer Pumps

    Bronze gear pump

    N993C-M26
    $1,298.70
    Bronze 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 p...

    3/4HP 115/230v Learn More
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  10. 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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