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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

    PVDF Air Operated Double Diaphragm Pump

    A100-FPK-SSKE-S70

    $3,252.86

    Kynar PVDF Air AODD Pump 1". Chemical double diaphragm pump made in USA. Featuring All-Flo's Lube-free air valve, Non-stalling, No vent holes for corrosive fumes to get into, All plastic air system are corrosion resistant. Non-electrical. Replaces...

    1" KE-10 kynar Santo Learn More
  2. General Pump

    T 49 Duplex Plunger 2.2hp Hollow Shaft

    T9721EBF

    $898.78
    T Series 49, Duplex Plunger Pump, Hollow Shaft, NEMA 56 C Flange (5/8" dia. shaft) for Direct Couple to Electric Motors - Duplex pump specifically designed for the demands of the water jetting industry. Forged brass manifold with an exclusive lif...
  3. All-Flo Pumps

    Air Diaphragm Pump

    AE-15

    $1,694.55
    Air Diaphragm Pump 1.5". Lube-free air valve, Non-stalling, No vent holes for corrosive fumes to get into, All plastic air system are corrosion resistant. Non-electrical. Models available in PP, PVDF, Nylon, Conductive Nylon, Al and 316SS from .2...
  4. Oberdorfer Pumps

    Bronze Pedestal Gear Pump w/ relief valve

    N9000RS18

    $1,708.20
    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 the b...
  5. General Pump

    T 49 Duplex Plunger 2.4hp Solid Shaft

    T731B

    $795.40
    T Series 49, Duplex Plunger Pump, Solid Shaft - Duplex pulsing action for improved impacted cleaning, ideal for drain cleaning and jetting application. Forged brass manifold with an exclusive lifetime warranty.
    • Forged brass manifold with an excl...
  6. Hypro Pumps

    Bronze Gear pump only

    MBN3VA

    $5,401.27
    Rotary Gear pump end. 303 SS fastners, 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 pressure...

  7. General Pump

    T 49 Duplex Plunger 2.5hp Solid Shaft

    T731B 2.5hp

    $793.73
    T Series 49, Duplex Plunger Pump, Solid Shaft - Duplex pulsing action for improved impacted cleaning, ideal for drain cleaning and jetting application. Forged brass manifold with an exclusive lifetime warranty.
    • Forged brass manifold with an ...
  8. Oberdorfer Pumps

    Bronze Pedestal Gear Pump w/ relief valve

    N9000RS3

    $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 the b...
  9. All-Flo Pumps

    Air Diaphragm Pump

    A050-NAA-TTYT-S00

    $1,171.50

    Air Diaphragm Pump

    Aluminum Air AODD Pump 1/2". Lube-free air valve, Non-stalling, No vent holes for corrosive fumes to get into, All plastic air system are corrosion resistant. Non-electrical. S = Standard (Suction Right / Discharge Right)Click ...

  10. General Pump

    T 49 Duplex Plunger 2.9hp Hollow Shaft

    T9731EBF

    $898.78
    T Series 49, Duplex Plunger Pump, Hollow Shaft, NEMA 56 C Flange for Direct Couple to Electric Motors - Duplex pump specifically designed for the demands of the water jetting industry. Forged brass manifold with an exclusive lifetime warranty.
    • S...
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