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Diaphragm Pumps

Diaphragm pump is a positive displacement pump that uses a combination of the reciprocating action of a rubber, thermoplastic or Teflon diaphragm and suitable non-return check valves to pump a fluid. Sometimes this type of pump is also called a membrane pump. A membrane made of elastomers or TFE, which flexes to produce pumping action. High viscosity liquids and solids ok.

The diaphragm is sealed with one side in the fluid to be pumped, and the other in air. The diaphragm is flexed, causing the volume of the pump chamber to increase and decrease. A pair of non-return check valves prevent reverse flow of the fluid.

Diaphragm pumps: have good suction lift characteristics, have good dry running characteristics, are low-shear pumps, can handle highly viscous liquids, cause a pulsating flow.

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  1. All-Flo Pumps

    Air Diaphragm pump Aluminum

    A100-NAA-VVYV-000

    $2,098.80
    Aluminum Air 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. Click here to Learn How to Size your Diaphragm Pump and for a Materi...
  2. All-Flo Pumps

    PVDF Air Operated Double Diaphragm Pump

    KE-15

    $8,250.00
    PVDF AODD Pump 1 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. Models available in PP, PVDF, Nylon, Conductive Nylon, Al and 316SS from .2...
  3. All-Flo Pumps

    PolyPro 2" Diaphragm Pump

    PT-20

    $7,899.81

    PolyPro 2" Diaphragm Pump, old PT-20. 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.

    Models available in PP, PVDF, Nylon, Conductive Nylon, Al a...

    Teflon diaphragm Learn More
  4. All-Flo Pumps

    PolyPro 2" Diaphragm Pump

    PE-20

    $6,596.64
    PolyPro 2" Diaphragm Pump, replaces PE-20. 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. Models available in PP, PVDF, Nylon, Conductive Nylon...
    Santoprene diaphragm Learn More
  5. All-Flo Pumps

    PVDF Air Operated Double Diaphragm Pump

    KN-20

    $16,116.14

    PVDF Air Operated Double Diaphragm AODD Pump 2". Was KN-20 All-Flo prior to new model numbering system. Fluid chambers are PVDF Kynar, Intermediate body is Polypro.

    Lube-free air valve, Non-stalling, No vent holes for corrosive fumes to get into,...

  6. All-Flo Pumps

    Diaphragm Pump Kynar

    C100-NPK-TTKT-G70

    $3,623.27
    Diaphragm Pump Kynar 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. Replaces KN-10 All pumps carry a full 5 year manufacturers warranty. ...
    1" Kynar KN-10 Learn More
  7. All-Flo Pumps

    PVDF Air Operated Double Diaphragm Pump

    KN-5

    $1,971.59

    PVDF AODD Pump 1/2". All-Flo diaphragm pump has Lube-free air valve, Non-stalling, No vent holes for corrosive fumes to get into. A050-SPK-TTKT-S70 Kynar pneumatic pump. All plastic air system are corrosion resistant. For pumping aggressive chemic...

    Kynar TFE 1/2" Learn More
  8. All-Flo Pumps

    PVDF Air Operated Double Diaphragm Pump

    KN-5E

    $1,759.44

    PVDF air operated double diaphragm pump. AODD Pump 1/2". All-Flo 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,...

    Kyner EPDM Santoprene Learn More
  9. All-Flo Pumps

    PVDF Air Operated Double Diaphragm Pump

    KN-10V

    $3,902.76
    PVDF 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” t...
  10. All-Flo Pumps

    PVDF Air Operated Double Diaphragm Pump

    KN-10E

    $3,252.86
    PVDF 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” t...
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