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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 Pumps

    Bronze Cooling Gear Pump w/ relief valve

    N1000R-66

    $450.00
    Water-cooled induction heating systems / machine cooling Pump. Bronze Pedestal Gear pump with relief valve. Often used as a coolant pump Ameritherm, Dynaflux. Pump flow is reversible.
    • Gear pumps are positive displacement pumps. Each shaft re...
    Water-cooled induction heating systems / machine cooling Pump. Bronze Pedestal Gear pump with relief valve. Often used as a coolant pump Ameritherm, Dynaflux. Pump flow is reversible.
    • Gear pumps are positive displacement pumps. Each shaft revolution displaces a definite amount of liquid relatively unaffected by the back pressure in the discharge line. Shaft speed and flow are directly proportional.
    • Learn More
  2. Pumptec

    200PSI Spray Sytem 12V

    80326

    $477.86
    Spray Pump Module 200 PSI. Basic Sprayer Pump System easily converts spot sprayer to a high-performance 200 PSI sprayer for tree spraying, ditch and fence line spraying, plus eave/overhand spraying. 114T PumpTec Pump, Nylon Body, FKM O-rings, Tefl...
    12VDC spray system Nylon body Learn More
  3. Jabsco Pumps

    24V Bronze Vane Puppy Pump

    18680-0940

    $463.00
    The Jabsco Reversible Rotary Vane Pump is ideal for transferring diesel fuel. NO reversing switch, it is ideal for moving fuel.
    • Rotor: Vectra
    • Vanes: Ryton
    • Seal: Lip Type, Nitrile
    • 24V motor
    • Self-priming up to about 3 ft.
    • Duty cycle-30 minu...
  4. Oberdorfer Pumps

    N991 Bronze gear pump PEO

    N991R-32

    $459.00
    Bronze gear pump & motor. 1/4" Pump housings and gears are made of top quality bronze; shafts are from stainless steel 303. Include relief valve built in. Bearings are designed of high performance carbon-graphite material selected for wear resist...
  5. Oberdorfer Pumps

    N992 Gear Pump PEO

    N992

    $465.00

    Gear Pump pump end only, 1/4". 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. Incl...

    3/8" Bronze Pump Only Learn More
  6. Jabsco Pumps

    Run dry 24vdc

    23920-9323

    $499.00
    Jabsco pump. For general purpose pumping where self-priming and extended run dry capability are required. Liquid stored in the specially designed pumphead provides 10 minutes or more of run dry operation after liquid supply tank is empty. Heavy...
    23920-9 Learn More
  7. Jabsco Pumps

    Run dry 12VDC Pump

    23920-9423

    $499.00
    Jabsco pump 8gpm. For general purpose pumping where self-priming and extended run dry capability are required. Liquid stored in the specially designed pumphead provides 10 minutes or more of run dry operation after liquid supply tank is empty. He...
  8. Hypro Pumps

    Gear Pump

    C3V

    $451.32
    CI Pedestal Gear Pump. Self-priming, positive displacement, external rotary gear pumps are ideal for a wide range of light-duty industrial, marine, agricultural, and commercial applications, providing a nearly pulseless flow and are designed ...
    Cast Iron 3/8" Learn More
  9. Hypro Pumps

    Gear Pump

    C3K

    $451.32
    CI Pedestal Gear Pump. Self-priming, positive displacement, external rotary gear pumps are ideal for a wide range of light-duty industrial, marine, agricultural, and commercial applications, providing a nearly pulseless flow and are designed spec...
  10. Hypro Pumps

    Cast Iron Pedestal Gear Pump

    C5K

    $453.62
    Cast Iron Pedestal Gear Pump, light duty with grease zerks that requires greasing.

    Self-priming, positive displacement, external rotary gear pumps are ideal for a wide range of light-duty industrial, marine, agricultural, and commercial applicati...

    3/4" Cast Iron Learn More
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