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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. Aquatec Pumps

    5 chamber diaphragm pump

    5513-1C01-J586

    $199.00
    550 Series Super Flow Pump: Reverse Osmosis System Pump, High Powered RO/DI Reverse Osmosis Pump

    OPERATION: The 550 pumps can draw water from a holding tank and pressurize it, or boost the pressure from a low pressure source. It is designed to op...

  2. Aquatec Pumps

    5 chamber diaphragm pump

    5502-2GC1-B526

    $199.00

    Demand Pump: Spraying, Ag and cleaning solutions. FKM seals.

    OPERATION: The 550 pumps can draw water from a holding tank and pressurize it, or boost the pressure from a low pressure source. It is designed to operate intermittently, but most versi...

    4GPM 80PSI 115v Learn More
  3. Aquatec Pumps

    Variable sp / constant PSI 115v

    5853-GB12-V81D

    $278.00
    Variable speed, constant pressure pumps. These pumps integrate a state-of-the-art digital controller. This unique intelligent controller makes the pumps able to maintain a constant pressure (within 2 PSI) for variable flow rates throughout thei...
    115v 1.2gpm 40 / 65psi Learn More
  4. Aquatec Pumps

    Variable sp / constant PSI 115v

    5853-GE12-V81D

    $278.00

    Variable speed, constant pressure pumps. These pumps integrate a state-of-the-art digital controller. This unique intelligent controller makes the pumps able to maintain a constant pressure (within 2 PSI) for variable flow rates throughout their o...

    1.2gpm 60 / 65psi 115v Learn More
  5. Aquatec Pumps

    Spray pump

    5502-IDN2-V77D

    $278.00
    5502-1DN2-V77D Spray Pump. Variable speed, constant pressure pumps. These pumps integrate a state-of-the-art digital controller. This unique intelligent controller makes the spray pump able to maintain a constant pressure (within 2 PSI) for var...
    Variable speed 115v Learn More
  6. Aquatec Pumps

    Variable speed constant PSI 115v

    5501-IEN2-V77D

    $278.00

    Variable speed, constant pressure pumps. These pumps integrate a state-of-the-art digital controller. This unique intelegant controller makes the pumps able to maintain a constant pressure (within 2 PSI) for variable flow rates throughout their op...

  7. Aquatec Pumps

    Variable speed constant PSI 115v

    5501-2D01-V578

    $320.00
    Variable speed, constant pressure pumps. 3 min time out if no water present. These pumps integrate a state-of-the-art digital controller. This unique intelegant controller makes the pumps able to maintain a constant pressure (within 2 PSI) for ...
  8. Pulsafeeder

    Chem-Tech Peristaltic 30 GPD

    XP030LAHX

    $706.50
    The Chem-Tech Series XP with peristaltic technology delivers worryfree dosing in a modern design. Each and every component of the Series XP is designed and manufactured for optimum reliability and durability for REAL Performance.

    Simplified op...

  9. Pulsafeeder

    Digital Control Peristaltic 26 GPD/100 PSI

    CTPD4HSA-PAP1

    $1,438.20
    CTP-D is for applications requiring precise feed rates, offering digital control from 10% to 100%

    Simplified operation. Push-button prime switch and on-off dial provide quick, safe start-up.

    High-strength Norpreneï½® peristaltic tubing is rated f...

  10. Pulsafeeder

    Digital Control Persitaltic 60 GPD/80 PSI

    CTPD6HSA-PAP1

    $1,438.20
    CTP-D is for applications requiring precise feed rates, offering digital control from 10% to 100%

    Simplified operation. Push-button prime switch and on-off dial provide quick, safe start-up.

    High-strength Norpreneï½® peristaltic tubing is rated f...

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