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    5" Air Operated Double Diaphragm Pump, 275 GPM

    5 out of 5 based on 1 reviews | Write a review
    Industrial air operated double diaphragm pump for pumping various corrosive liquids and high viscosity fluids, stainless steel, aluminum alloy and non-metallic body material, comes with 5 inch (DN125 mm) flange fluid inlet and outlet. This heavy duty AODD pump is easy to install and operate.
    SKU: ATO-AODD-125
    30-day Returns
    Free Shipping
    Delivery date: 6-12 days

    Air powered diaphragm pump driven by compressed air, can suck a variety of toxic, flammable, volatile liquid, acids, alkalis, corrosive liquids, high viscosity fluids and paint binders. It is no need for irrigation and suction lift is up to 7m, which is perfect pneumatic device for pumping the medium containing impurities.


    • Pneumatic dual diaphragm pump can transport high temperature media up to 130 ℃.
    • Adopt pilot operated type air valve to eliminate the AODD pump downtime and extend its life span.
    • It is designed with multiport to help you install it easily.
    • Air powered diaphragm pump can be used as a movable-type material transfer pump because it has such advantages as small in size, easy moving, no need base, small occupied area and easy installation.
    • It can be externally connected to an electromagnetic valve for remote control. And the reversing valve requires no lubrication.


    Model T-QYB3-125
    Max. Flow 275 GPM (568 LPM)
    Max. Working Pressure 120 PSI (0.84 Mpa)
    Fluid Inlet Size 5 inch (DN125-10kg) Flange
    Fluid Outlet Size 5 inch (DN125-10kg) Flange
    Air Inlet Size 3/4 inch NPT
    Max. Suction Lift Dry Suction 8 ft. (2.4m)
    Wet Suction 25 ft. (7.6m)
    Max. Permitted Grain 3/8 in. (6.4mm)
    Max. Air Consumption 82.6 SCFM
    Every Stroke Flow 2.0 gal. (7.6L)
    Max. Reciprocating Speed 135 cpm
    Body Structure Material Aluminum Alloy/ Cast Steel/ Non-Metallic (Plastic)/ Stainless Steel
    Diaphragm Material Butyronitrile (Default)/ Teflon (Customizable)
    Weight 150kg/ 120kg/ 150kg/ 100kg

    Dimensions (Unit: mm)

    Dimension Drawing of 5 inch Air Operated Double Diaphragm Pump

    Air Consumption Diagram

    Air Consumption Diagram of 5 inch Air Operated Double Diaphragm Pump

    Fluid Flow Diagram

    Fluid Flow Diagram of 5 inch Air Operated Double Diaphragm Pump


    Details of 5 inch Air Operated Double Diaphragm Pump

    1 Discharge outlet (top cover) 11 Pitman shaft 22 PTFE diaphragm
    2 Sealing ball 12 Large slider aluminum piece 23 Poly rubber diaphragm
    3 Sealing seat O-ring 13 Piston 24 Inner clamp
    4 Sealing seat 14 Air valve chamber cover 25 Baffle
    5 Sliding plate gasket 15 Air valve chamber cover gasket 26 Air valve chamber gasket
    6 Small slider 16 Sliding plate 27 V-Ring
    7 Auxiliary shaft 17 Piston sleeve 28 Pitman shaft sleeve
    8 Air valve chamber 18 Column 29 V-Ring
    9 Auxiliary shaft O-ring 19 Clamp screw 30 Muffler
    10 Auxiliary shaft cover 20 Clamp O-ring 31 Feed inlet (bottom cover)
    21 Outer clamp 32 Bracket (base)


    Applications of Air Operated Double Diaphragm Pump

    Tips: Difference between air operated diaphragm pump and self-priming pump

    Air operated diaphragm pump is a kind of pneumatic pump that uses diaphragm as the raw material medium. According to the motive force as the basis for classification, diaphragm pumps are divided into electric diaphragm pumps and pneumatic diaphragm pumps. Compared with ordinary water pumps, it has more advantages and simpler usage.

    The self-priming pump adopts an axial liquid return pump body structure. The pump body is composed of a suction chamber, a liquid storage chamber, a scroll chamber, a liquid return hole, a gas-liquid separation chamber, etc. After the pump is started normally, the impeller will suck the liquid in the chamber. It is sucked together with the air in the suction pipe and is completely mixed in the impeller. Under the action of centrifugal force, the liquid enters the gas and flows to the outer edge of the scroll. A white foam belt with a certain thickness and high speed is formed on the outer edge of the impeller. Rotating the liquid ring, the gas-liquid mixture enters the gas-liquid separation chamber through the diffuser.

    Existing reviews of 5" Air Operated Double Diaphragm Pump, 275 GPM
    I would buy it again.
    Received this item just what I want! It is cheaper than many other same function diaphragm pump. I bought a stainless steel one, it is high performance and durable. I used this air operated diaphragm pump for discharge used oil. It worked great. I would buy it again.
    From: Richard J. | Date: 28/04/2022
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