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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. Flojet Pumps

    Diaphragm pump

    G575208

    $214.51
    Air driven, pneumatic pump. Glass filled Polypropylene double diaphragm pump with Santoprene diaphragms and EPDM check valve seats. Springs are Hastalloy.

    Connections are 3/8" HB . Air connection is 1/4" PLASTIC.

  2. Flojet Pumps

    Duplex Diaphragm pump

    G573175

    $317.40
    Air driven, pneumatic pump. Glass filled Polypropylene double diaphragm pump with FKM diaphragms and check valve seats. Springs are Hastalloy.

    Connections are 1/2" Male Pipe Thread MNPT. Air connection is 1/4" barb brass. 2CFM air. Special mod...

  3. Flojet Pumps

    Duplex Diaphragm pump

    G573185

    $317.40
    Glass filled Polypropylene double diaphragm pump with FKM diaphragms and check valve seats. Springs are Hastalloy.

    Connections are 3/8" MNPT" . Air connection is 1/4HB brass.

  4. Flojet Pumps

    Duplex Diaphragm pump

    G573218

    $317.40
    Glass filled Polypropylene double diaphragm pump with FKM diaphragms and check valve seats. Springs are Hastalloy.

    Connections are 1/2" HB straight. Air connection 1/4” (6.4 mm) Plastic Hose Barb

    Used with all sorts of cleaning chemicals an...
  5. Flojet Pumps

    Air Diaphragm pump

    G573208

    $357.40
    Air driven, pneumatic pump. Glass filled Polypropylene double diaphragm pump with FKM diaphragms and check valve seats. Springs are Hastalloy.

    Connections are 3/8" HB straight. Air connection is 1/4" HB PLASTIC.

  6. Flojet Pumps

    Duplex Diaphragm pump

    G575175

    $214.51
    Flojet double diaphragm pump with Santoprene diaphragms and EPDM check valve seats. Springs are Hastalloy.

    Connections are 1/2" MNPT. Air connection is 1/4" HB brass.

  7. Flojet Pumps

    Duplex Diaphragm pump

    G575225A

    $214.51
    Air driven, pneumatic pump. Glass filled Polypropylene double diaphragm pump with Santoprene diaphragms and EPDM check valve seats. Springs are Hastalloy.

    Connections are 3/4" HB. Air connection is 1/4" brass.

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