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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. Hypro GN63 Hot oil pump Fat Fryer Cooking Oil Pump

    Hypro Pumps

    Fat Fryer Cooking Oil Pump

    GN63
    $985.94
    Hot Oil Cooking Pump Head, Fat Fryer / Filter, with close coupled Motor HP 1/3. NSF Carbonator Close Coupled Gear Pumps. NSF paint Color White on outer surfaces. Hot glycol or heat transfer liquids. Steel gears.

    • Pumps can operate bi-directio...

    gn hot oil Learn More
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  2. Hypro GMBN5VB6 Bronze Rotary Gear pump

    Hypro Pumps

    Bronze Rotary Gear pump

    GMBN5VB6
    $2,943.93
    Rotary Gear pump with electric motor. 303 SS fastners, Ryton gears. Heavy duty rotary external Gear pump, heavy duty with motor.

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

    3/4" 2HP 115/230v Learn More
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  3. 24vDC gear pump and motor oberdorfer bronze

    Oberdorfer Pumps

    N992R Gear Pump & Mtr

    N992RM-J07
    $1,142.90
    Rotary bronze gear pump with electric 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 s...
    1/2Hp 115/230v ODP Learn More
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  4. Hypro GMBN2 Rotary Gear pump with electric motor

    Hypro Pumps

    Bronze Gear pump

    GMBN2VA33
    $2,238.04
    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...

    1/4" 1/3HP 230/460v Learn More
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  5. Bronze Gear pump

    Hypro Pumps

    Bronze Gear pump

    GMBN4VA5
    $2,616.44
    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...

    3/4" 1.5HP 115/230V ODP Learn More
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  6. Bronze Gear pump 1HP

    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
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  7. Oberdorfer N61K10G-01C33 Bronze Rotary Gear Pump Motor

    Oberdorfer Pumps

    Bronze Rotary Gear Pump & Motor

    N61K10G-01C33
    $551.00
    PUMP AND MOTOR, no relief valve.

    This Bronze Rotary Gear Pump is popular among OEM users like generator Onan. 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...

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  8. Hypro GMCV2VA3 Cast Iron Gear pump 1/4

    Hypro Pumps

    Cast Iron Gear pump 1/4"

    GMCV2VA3
    $1,530.98

    Rotary Cast Iron Gear pump end. 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 one minute.

    Hypr...

    3/4HP 115/230v ODP 1/4" Learn More
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  9. PumpBiz 6500N Roller Pump Ni-Resist

    PumpBiz

    Roller Pump Ni-Resist

    6500N
    $449.00
    Hypro® SherTech® NR 6500 Series roller pumps generate high pressures at low flow rates. Their compact, self-priming design and their ability to handle abrasives make them a efficient solution for a wide variety of challenging applications.

    Hy...

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  10. PumpBiz 6500XL Roller Pump Silvercast

    PumpBiz

    Roller Pump Silvercast

    6500XL
    $620.00
    Hypro® SherTech® NR 6500 Series roller pumps generate high pressures at low flow rates. Their compact, self-priming design and their ability to handle abrasives make them a efficient solution for a wide variety of challenging applications.

    Hy...

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