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Positive Displacement Pumps

These pumps are often thought of as high-pressure pumps. Their positive displacement of fluid and fixed volume are the result of the fluid being mechanically moved through their pump passage on a regular cycle. This means that regardless of the system they discharge into, the pressure and volume will remain constant. The power of the driving device and its speed, limit the volume and pressure.Positive Displacement pumps:Flow rates of GPD, CC/min to 100 GPM typically.Discharge pressures of a 1 to 1000 PSI.Low speed and fixed volume per cycle, they handle very viscid fluids well.Smaller than centrifugal pumps.Quiet, do not ad much heat to the fluid, suitable for shear sensitive fluids.Diaphragm pumps can easily pass solids, stringy and fibrous foreign matter. Are made in materials from CI to Titanium and PP, PVDF and PPS engineering resins.
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  1. All-Flo Pumps

    PP Air Operated Double Diaphragm Pump

    C100-NPP-SSPE-G70

    $2,034.00

    PolyPro AODD Pump 1".

    Lube-free air valve, Non-stalling, No vent holes for corrosive fumes to get into, All plastic air system are corrosion resistant. Replaces BK-10E. Non-electrical. Models available in PP, PVDF, Nylon, Conductive Nylon, Al and...

    BK-10E Learn More
  2. Hypro Pumps

    Cast Iron Pedestal Gear Pump

    C6K

    $1,634.69
    Cast Iron Pedestal Gear Pump, light duty with grease zerks that requires greasing. NO relief valve.

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

    1" Cast Iron Learn More
  3. Hypro Pumps

    Cast Iron Pedestal Gear Pump

    C6V

    $1,821.38

    Cast Iron Pedestal Gear Pump 1"

    without relief valve.

    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 puls...

    Frame mount 1" Learn More
  4. Jabsco Pumps

    Flex. Imp. Face Seal

    777-9003

    $590.00
    Flexible impeller pump. Full cam. Neoprene for water and general purpose pumping. Nitrile impeller is ideal for oil based products. Reduce flow 50% for half cam operation. Use face seal to extend pump life. Do not pump gasoline or other flammable...
  5. Jabsco Pumps

    Flex. Imp. Face Seal

    777-9051

    $618.00
    Flexible impeller pump. Half cam pump reduces flow 50% from curve chart. Neoprene for water and general purpose pumping. Nitrile impeller is ideal for oil based products. Reduce flow 50% for half cam operation. Use face seal to extend pump life. ...
  6. Jabsco Pumps

    Flexible Impeller pump

    777-0003

    $578.00
    Flexible impeller pump. Full cam. Neoprene for water and general purpose pumping. Nitrile impeller is ideal for oil based products. Reduce flow 50% for half cam operation. Use face seal to extend pump life. Do not pump gasoline or other flammab...
  7. Jabsco Pumps

    Flex. Imp. Face Seal

    777-9001

    $590.00
    Flexible impeller pump. Full cam. Neoprene for water and general purpose pumping. Nitrile impeller is ideal for oil based products. Reduce flow 50% for half cam operation. Use face seal to extend pump life. Do not pump gasoline or other flammable...
  8. Hypro Pumps

    Bronze gear pump 12-24 gpm

    B6

    $3,250.33
    Rotary Gear Pump. Bronze pedestal mounted gear pump. For oils, paint , inks and other lubricating liquids. Pump has packing along the shaft. Do not pulley drive. Has grease zerk fittings. Without Relief Valve, Seal Kevlar Packing, Bronze Spur G...
    1" Pedestal pump Learn More
  9. Oberdorfer Pumps

    Bronze Pedestal Gear Pump w/ relief valve

    N9000R

    $1,357.20
    Bronze Pedestal Gear pump with relief valve. Often used as a oil pump on large ships to pre-lube the bearings.
    • Gear pumps are positive displacement pumps. Each shaft revolution displaces a definite amount of liquid relatively unaffected by t...
  10. Jabsco Pumps

    Bronze pump Flexible Impeller Lip Seal

    777-0001

    $578.00
    Flexible impeller pump. Full cam. Neoprene for water and general purpose pumping. Nitrile impeller is ideal for oil based products. Reduce flow 50% for half cam operation. Use face seal to extend pump life. Do not pump gasoline or other flammable...
    Frame / Bearing pedestal mount Learn More
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