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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 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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  3. Oberdorfer N990RJ-T95 Bronze Rotary Gear Pump w/ motor relief valve

    Oberdorfer Pumps

    Bronze Rotary Gear Pump w/ motor & relief valve

    N990RJ-T95
    $1,948.00
    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...
    Learn More
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  4. Oberdorfer N1100W-T98 1.25 Bronze gear pump

    Oberdorfer Pumps

    1.25" Bronze gear pump

    N1100W-T98
    $2,159.00
    1 1/4" Bronze rotary gear pump with relief valve and close coupled to a 1 1/2 HP TEFC motor.

    Use to pump oil and other viscous thick liquids, De-icing fluids.

    1.5HP 230/460v Learn More
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  5. Jabsco 30520-0003 30520 SS 0003 Pedestal

    Jabsco Pumps

    30520 SS 0003 Pedestal

    30520-0003
    $1,926.00
    Pedestal Mounted Flexible Impeller pump Stainless. No Motor

    Use where single or variable speed operation and 316 Stainless Steel material is desirable. Self-priming, 22 gpm flow, and debris tolerant. Nitrile impeller is ideal for oil based produc...

    PEO PEDESTAL SS 1" NIT Learn More
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  6. Oberdorfer N994J-T45 N994 Gear Pump & Mtr.

    Oberdorfer Pumps

    N994 Gear Pump & Mtr.

    N994J-T45
    $1,808.00
    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...

    1-1/2Hp 115/230v Learn More
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  7. AMT electric diaphragm mud pump 3" ipt

    AMT Pumps

    3" Electric Diaphragm Pump

    337E-96
    20% Off Special Price $2,702.40 Regular Price $3,378.00

    Electric Diaphragm water pumps features 2-stage, 44 to 1 gear reduction with a large diameter output gear and heavy duty ball bearing construction. Often referred to as Mud pumps or Sludge pumps, diaphragm trash pumps are designed to pump mud, slu...

    1.5HP 115/230v Learn More
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  8. AMT electric diaphragm mud pump 3" ipt

    AMT Pumps

    3" Electric Diaphragm Pump

    337T-96
    20% Off Special Price $2,702.40 Regular Price $3,378.00

    Electric Diaphragm water pumps features 2-stage, 44 to 1 gear reduction with a large diameter output gear and heavy duty ball bearing construction. Often referred to as Mud pumps or Sludge pumps, diaphragm trash pumps are designed to pump mud, slu...

    1.5HP 3 Phase Electric Learn More
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  9. 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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  10. Oberdorfer N990J-T45 Bronze Rotary Gear Pump w/ motor

    Oberdorfer Pumps

    Bronze Rotary Gear Pump w/ motor

    N990J-T45
    $2,307.00
    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...
    Learn More
    Add to Wish List Add to Compare
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