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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
    $6,037.63

    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 N990RH-M46 Bronze Rotary Gear Pump w/ motor relief valve

    Oberdorfer Pumps

    Bronze Rotary Gear Pump w/ motor & relief valve

    N990RH-M46
    $2,748.20
    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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  3. Oberdorfer N970H-M46 3/4 Bronze gear pump 3/4HP

    Oberdorfer Pumps

    3/4" Bronze gear pump 3/4HP

    N970H-M46
    $1,597.70
    3/4" Bronze rotary gear pump with relief valve and close coupled to a 3/4 HP 115v/1/60 1150 RPM TEFC motor. Shaft speed and flow are directly proportional. Motor HP needs to increase with a increase in pump pressure. The nature of a positive disp...
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  4. Oberdorfer N61K10G-01F02 Bronze Rotary Gear Pump Motor

    Oberdorfer Pumps

    Bronze Rotary Gear Pump & Motor

    N61K10G-01F02
    $721.50
    PUMP AND MOTOR. No relief valve.

    This Bronze Rotary Gear Pump is popular among OEM users. It is a diesel fuel transfer pump featuring an all bronze design and 303 stainless steel shafts with options of non-metallic gears and a variety of sha...

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  5. Oberdorfer N990H-N26 Bronze Rotary Gear Pump w/ motor

    Oberdorfer Pumps

    Bronze Rotary Gear Pump w/ motor

    N990H-N26
    $2,276.30
    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 ...
    Learn More
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  6. Oberdorfer N990J-T47 Bronze Rotary Gear Pump w/ motor

    Oberdorfer Pumps

    Bronze Rotary Gear Pump w/ motor

    N990J-T47
    $3,624.13

    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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  7. graco_fp12 gtp12 fuel gas diesel pump

    PumpBiz

    120v Electric Fuel Transfer

    927
    $784.00

    115-120v fuel transfer pump This model is manual, meaning no automatic nozzle. Positive displacement, self-priming vane pumps are designed for efficient gasoline, kerosene, and diesel fuel transfer. Flexible mounting options fit any tank design.

    ...
    120v Diesel Learn More
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  8. graco_fp1 fuel pump 115v

    Graco Pumps

    115v Electric Fuel Transfer

    FP115A
    $499.00
    Graco Fuel Transfer Pumps GTP have an efficient motor and gear design that allows for high output and with minimal current draw. They can easily be mounted on any tank design, on either side of the truck. 260026 has regular / leaded gas nozzle ...
    Automatic 260026 Leaded Fuel Pump Learn More
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  9. 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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  10. 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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