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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 - A100-FPP-SSPE-S70 polypro Air Operated Double Diaphragm

    All-Flo Pumps

    PolyPro 1" Air Operated Double Diaphragm Pump

    A100-FPP-SSPE-S70
    $1,737.56

    PolyPro 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 PE...

    1" PE-10 PolyPro Santo Learn More
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  2. All-Flo - A100-FPP-GGPN-S70 polypro Air Operated Double Diaphragm

    All-Flo Pumps

    PolyPro Air Operated Double Diaphragm Pump

    A100-FPP-GGPN-S70
    $2,857.80

    PolyPro Air AODD Pump 1", Geolast diaphragm. 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-elec...

    1" PE-10 PolyPro Geolast Learn More
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  3. All-Flo - A100-FPP-TTPT-S70 polypro Air Operated Double Diaphragm

    All-Flo Pumps

    PolyPro Air Operated Double Diaphragm Pump

    A100-FPP-TTPT-S70
    $2,143.32

    PolyPro Air AODD Pump 1", PTFE diaphragm. 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-electri...

    1" PE-10 PolyPro PTFE Learn More
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  4. All-Flo C100-NPP-GGPN-G70 PP Air Operated Double Diaphragm Pump

    All-Flo Pumps

    PP Air Operated Double Diaphragm Pump

    C100-NPP-GGPN-G70
    $1,739.24
    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. Non-electrical. Models available in PP, PVDF, Nylon, Conductive Nylon, Al and 316SS from .25...
    NC-10 Learn More
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  5. aodd allflo diaphragm pump bk-10

    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
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  6. All-Flo CN-025B Conductive Nylon AODD Pump

    All-Flo Pumps

    Conductive Nylon AODD Pump

    CN-025B
    $513.15
    Although the air powered pump eliminates ignition from electrical motors and internal combustion engines when pumping flammable fluids there is still the possibility of static electrical charge build up on the outside of the pump. All-flo now p...
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  7. allflo_a050-spp-sspe-s70_1.jpg

    All-Flo Pumps

    PP Air Operated Double Diaphragm Pump

    A050-SPP-TTPT-S70
    $1,234.50
    PolyPro / Teflon 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. For handling large size solids order the Max-pass valve under...
    PolyPro / Teflon 1/2" Learn More
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  8. All-Flo PE-038 PP Air Operated Double Diaphragm Pump Bolted Series

    All-Flo Pumps

    PP Air Operated Double Diaphragm Pump Bolted Series

    PE-038
    $601.31
    PolyPro Air AODD Pump 3/8" S038-SQP-SEPE-S70. Lube-free air valve, Non-stalling, No vent holes for corrosive fumes to get into, All plastic air system are corrosion resistant. Non-electrical. Click here to Learn How to Size your Diaphragm Pum...
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  9. All-Flo CT-038 Conductive Nylon AODD Bolted Model

    All-Flo Pumps

    Conductive Nylon AODD Bolted Model

    C038-SQY-TT3T-SF0
    $1,092.69
    Diaphragm pump, Conductive Nylon. AODD pumps, Although the air powered pump eliminates ignition from electrical motors and internal combustion engines when pumping flammable fluids there is still the possibility of static electrical charge buil...
    3/8" Learn More
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  10. All-Flo SE-05-A43-10E Double Diaphragm Pump Exp Cycle Count

    All-Flo Pumps

    Double Diaphragm Pump Exp Cycle Count

    SE-05-A43-10E
    $2,016.30
    316 SS AODD Pump 1/2". Installed option Lube-free air valve, Non-stalling, No vent holes for corrosive fumes to get into, All plastic air system are corrosion resistant. Counting the number of cycles provides a method of measuring how much flui...
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  1. Air-Pneumatic 51 items