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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

    Diaphragm Pump Air

    A300-NAA-VVYV-B30

    $6,678.10
    Diaphragm Pump Air. Aluminum AODD Pump 3". Lube-free air valve, Non-stalling, No vent holes for corrosive fumes to get into, All plastic air system are corrosion resistant. Non-electrical. Diaphragm Pump Air Models available in PP, PVDF, Nylon,...
    Aluminum FKM 3" Learn More
  2. All-Flo Pumps

    Stainless Steel Air Operated Double Diaphragm Pump

    A200-C33-TT3T-B70

    $7,453.06

    Stainless Steel AODD Pump 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. 316SS 2" connections are dual FNPT and Flange (ANSI 150#/DIN) design.

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  3. All-Flo Pumps

    Stainless Steel Air Operated Double Diaphragm Pump

    SE-20

    $6,583.16

    2" Stainless Steel Air Operated Double Diaphragm Pump 2". FDA Santoprene diaphragm. Lube-free air valve, Non-stalling, No vent holes for corrosive fumes to get into, All plastic air system are corrosion resistant. Non-electrical. 2" connections ar...

    316SS, Santo, EPDM 2" Learn More
  4. All-Flo Pumps

    PP Air Operated Double Diaphragm Pump

    A050-SPP-TTPT-S70

    $823.00
    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
  5. All-Flo Pumps

    Air Operated Double Diaphragm Pump Bolted Series

    A050-NAA-SSPE-S00

    $781.00
    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. Click here to Learn How to Size your Diaphragm Pump and for a Mate...
  6. Standard

    Stainless Steel Diaphragm pump FDA

    SPFG05PPP

    $2,593.00

    Stainless Steel Diaphragm pump, air / pneumatic, double

    FDA Compliant double diaphragm Pumps are specifically engineered for food and cosmetic applications and are constructed with the FDA CFR Title 21 approved materials for food contact. Each ai...

    1/2" 316SS Learn More
  7. Standard

    Sanitary Stainless Steel Diaphragm pump

    SPSN15NPT

    $11,899.00

    Standard Sanitary Pumps are the ideal solution for food processing and pharmaceutical applications. Our sanitary AODD pumps feature highly polished SS316 components (32 Ra), a swivel mounting stand and an energy-efficient, oil-free air valve syste...

    1/2" 316SS Learn More
  8. All-Flo Pumps

    PP Air Operated Double Diaphragm Pump Bolted Series

    PE-038

    $400.87
    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...
  9. All-Flo Pumps

    Conductive Nylon AODD Bolted Model

    C038-SQY-TT3T-SF0

    $728.46
    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
  10. All-Flo Pumps

    Conductive Nylon AODD Bolted Model

    CB-038

    $416.46
    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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