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    1-1/2" Air Operated Double Diaphragm Pump, 40GPM

    5 out of 5 based on 1 reviews | Write a review
    Buy industrial air operated double diaphragm pump with 1-1/2 inch fluid inlet and outlet, 1/2 inch air inlet, air driven, selectable cast steel, aluminum alloy, stainless steel and non-metallic body material. This AODD pump at low price used for pumping slurry, high viscosity fluids, corrosive liquids and paint, manufacturer direct sale.
    SKU: ATO-AODD-40
    Free Shipping Worldwide
    Delivery date: 6-12 days

    Air driven dual diaphragm pump with high efficiency and high pressure, is powered by compressed air to pump a variety of toxic, flammable, volatile liquid, high viscosity fluids, acids, alkalis, corrosive liquids and paint.


    • Pneumatic dual diaphragm pump can transport high temperature media up to 150 ℃.
    • 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 ATO-QBYK3-40
    Max. Flow 40 GPM (151 LPM)
    Max. Working Pressure 120 PSI (0.84 Mpa)
    Fluid Inlet Size 1-1/2 inch (DN40) NPT
    Fluid Outlet Size 1-1/2 inch (DN40) NPT
    Air Inlet Size 1/2 inch NPT
    Max. Suction Height (Dry Suction) 18 ft. (4.5m)
    Max. Permitted Grain 1/8 in. (3.2mm)
    Max. Air Consumption 23.66 SCFM
    Every Stroke Flow 0.15 gal. (0.15L)
    Max. Reciprocating Speed 276 cpm
    Body Structure Material Option Cast Steel/Aluminum Alloy/Stainless Steel/Non-Metallic (Plastic)
    Diaphragm Material Butyronitrile (Default)/ Teflon (Customizable)
    Weight 15.5kg/ 9kg/ 15.5kg/ 8kg

    Dimensions (Unit: mm)

    Dimension Drawing of 1-1/2 inch Air Operated Double Diaphragm Pump

    Air Consumption Diagram

    Air Consumption Diagram of 1-1/2 inch Air Operated Double Diaphragm Pump

    Fluid Flow Diagram

    Fluid Flow Diagram of 1-1/2 inch Air Operated Double Diaphragm Pump


    Details of 1-1/2 inch Air Operated Double Diaphragm Pump

    1 Discharge outlet (top cover) 13 Plug 24 Piston sleeve
    2 Plug 14 Sealing ball 25 Clamp screw
    3 Air valve cover gasket 15 Sealing seat 26 Clamp O-ring
    4 Large slider aluminum piece 16 Air valve chamber cover 27 Outer clamp
    5 Piston 17 Auxiliary shaft 28 PTFE diaphragm
    6 V-Ring 18 Large slider O-ring 29 Poly rubber diaphragm
    7 Small slider 19 Large slider plastic ring 30 Inner clamp
    8 Auxiliary shaft O-ring 20 Colum 31 Baffle
    9 Auxiliary shaft cover 21 Pitman shaft 32 Air valve chamber gasket
    10 Sliding plate 22 Pitman shaft sleeve 33 Muffler
    11 Sliding plate gasket 23 V-Ring 34 Feed inlet (bottom cover)
    12 Air valve chamber


    Applications of Air Operated Double Diaphragm Pump

    Tips: How to maintain an air operated double diaphragm pump?

    • Air operated double diaphragm pump is no need for any lubricant before and during you use it. But after you disassemble the pneumatic dual diaphragm pump or when you reassemble it, it is better to fill some proper grease between pitman shaft and pitman shaft sleeve. When you install the diaphragm clamp, you also can coat a layer of grease for sealing easily.
    • If you need to install the air valve and guide valve, it is better to fill a small amount of grease for better lubrication.
    • Before you install the AODD pump, you need to clean all the inside parts, check whether all the sealing parts are well sealed.
    • Air valve cover gaskets and air valve chamber gaskets have two sides that can’t be installed reversely. The upper guide valve should be confirmed in place before tightening bolts, otherwise it will damage the thimble. Four bolts on the guide valve should be balanced and not over tight, otherwise the shell valve will be damaged.
    Existing reviews of 1-1/2" Air Operated Double Diaphragm Pump, 40GPM
    A great AODD pump and very affordable.
    This pneumatic diaphragm pump worked and didn't leak. I used it to transfer lubrication oil into an overhead tank. So far, it’s been working great and it runs about 10 hours a day. It made of aluminum alloy, well made.
    From: Kurry | Date: 27/04/2022
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