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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 N5100-050A Diaphragm Pump 1.9GPM

    Flojet Pumps

    Diaphragm Pump 1.9GPM

    N5100050A
    $300.00
    Oil Resistant Acetyl Copolymer housing with Buna Elastomers. 5100-050A Flow rates to 1.9gpm and operating pressures 20 to 75psi, Duplex diaphragm design. Foam application. SALE!!!

    Max. air 80 PSI and .77 CFM For use on water like liquids.

    Buna Learn More
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  2. Pulsafeeder LPB4SA-PTC1 Metering Pump - 24 GPD/100 PSI

    Pulsafeeder

    Metering Pump - 24 GPD/100 PSI

    LPB4SA-PTC1
    $901.17
    The Series E Plus offers manual control over stroke length andstroke rate.
    • 20 flow/pressure envelops
    • 100:1 turn down ratio
    • Auto-off-Manual selection switch with indicator lights
    • Built in fuse
    • Clear hinged cover over controls for water resistance...
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  3. Flojet-G57-diaphragm-pump-PumpBiz.jpg

    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...

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  4. Flojet-G57-diaphragm-pump-PumpBiz2.jpg

    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.

    FKM Learn More
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  5. Flojet-G57-diaphragm-pump-PumpBiz.jpg

    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
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  6. Flojet-G57-diaphragm-pump-PumpBiz2.jpg

    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.

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  7. Flojet-G57-diaphragm-pump-PumpBiz.jpg

    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...

    g Learn More
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  8. Flojet-G57-diaphragm-pump-PumpBiz.jpg

    Flojet Pumps

    Duplex Diaphragm pump

    G573215A
    $316.25
    ON SALE!!! Sale price as shown above.Glass filled Polypropylene double diaphragm pump with FKM diaphragms and check valve seats. Springs are Hastalloy.

    Connections are 1/2" straight. Air connection is 1/4" FNPT brass.

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  9. Flojet-G57-diaphragm-pump-PumpBiz.jpg

    Flojet Pumps

    Duplex Diaphragm pump

    G573225
    $317.40
    Glass filled Polypropylene double diaphragm pump with FKM diaphragms and check valve seats. Springs are Hastalloy.

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

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  10. Flojet-G57-diaphragm-pump-PumpBiz2.jpg

    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.

    Learn More
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