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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. Pulsafeeder

    Metering Pump - 6 GPD/80 PSI

    LC02SA-PTC1

    $535.50
    Our lowest cost model; Manual function control for stroke length; Optional external pacing only operation with momentary prime switch; Highly reliable timing circuit; EMI resistant; Thermally protected solenoid with auto-reset, Bleed valve assemb...
  2. Pulsafeeder

    Metering Pump Chemical

    LB03SA-PTC1

    $1,884.98
    Chemical metering pump. 12GPD The Pulsatron Series A Plus offers manual control over stroke length and stroke rate. Head mat'l is glass-filed PPL.
    • 4 distinct flow/pressure envelops
    • 100:1 turn down ratio
    • Internally dampened to reduce noise - idea...
  3. Flojet Pumps

    Air Diaphragm pump

    G575215A

    $214.51

    Air driven, pneumatic pump. Glass filled Polypropylene double diaphragm pump with Santoprene diaphragms and EPDM check valve seats. Springs are Hastalloy. Often used on water cooling circuit for spot welders. Coolant pump replacement weilander tim...

  4. Aquatec Pumps

    Ag 115v Diaphragm Pump

    5502-2F77-M526

    $527.06
    Aquatec 550 Series Super Flow Pump: These pumps are specifically designed for Ag applications such as MOSQUITO pesticides and fertilizers.
    • OPERATION: The 550 pumps can draw water from a holding tank and pressurize it, or boost the pressure from ...
    4GPM 70psi Learn More
  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

    Diaphragm pump

    G575205

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

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

    ...
    3/8" Santoprene Learn More
  7. 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.

  8. Flojet Pumps

    Duplex Diaphragm pump

    G575218

    $227.70
    Air driven, pneumatic pump. Glass filled Polypropylene double diaphragm pump with Santoprene diaphragms and EPDM check valve seats. Springs are Hastalloy.

    Connections are 1/2" HB straight. Air connection is 1/4" HB PLASTIC.

    These little E...

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