EH2-M Metallic 2" (50mm) AOD – Ball Valve Pump


    The EH2-M pump is a 2:1 ratio high-pressure pump powered via compressed air. Capable of delivering discharge pressures twice the inlet pressure up to 250 psig (17.2 barg), the EH2-M pump is designed for durability. The pump can be utilized in demanding applications, such as filter press feeds, as well as other critical applications requiring higher discharge pressures most air-operated diaphragm (AOD) pumps aren’t capable of achieving.

    This pump is engineered to include weighted check balls and metallic seats to help ensure a robust and durable valve seal for performance in high-pressure applications. Unlike other high-pressure pumps on the market, the SANDPIPER EH2-M unit features a balanced diaphragm design. This design allows for a minimal pressure differential across the diaphragm, helping to decrease the need for replacement parts—effectively decreasing downtime and, ultimately, lowering the total cost of ownership.

    The EH2-M high-pressure pump is available in cast iron and stainless steel with various diaphragm (elastomer) options. Pump features include:

    • Heavy-duty assembly: Bolted construction using robust materials.
    • Durability: Balanced diaphragm design with weighted check balls and metallic seats for harsh, high-pressure applications.
    • Suction stroke control: Independently regulated suction stroke allows for optimum stroke control.
    • ESADS+ Air Distribution System: SANDPIPER is the only AOD pump manufacturer to offer an externally serviceable air distribution system that allows quick and easy access to the pilot and spool valves without removing the pump from service. Repair or clean in five minutes (versus 55 minutes for competitors), which reduces your downtime by as much as 90%.

    Performance Guarantees

    Chemical Compatibility Guide

    To determine chemical compatibility with this pump, please refer to our Chemical Compatibility Guide.


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    EH2-M Metallic 2" AOD Ball Valve Pump




    Port Size 2" NPT
    Capacity 0 to 74 gpm (280 lpm)
    Air Distribution Valve No-lube, no-stall design
    Solids-Handling Up to ¼" (6.3 mm)
    Heads Up To 250 psi or 577 ft. of water (17 bar or 176 meters)
    Displacement/Stroke .36 gallons (1.3 liters)
    Max Operating Pressure 250 psi (17 bar)
    Shipping Weight
    Cast Iron
    316 Stainless Steel

    172 lbs (78 kg)
    176 lbs (80 kg)




    EH2-M CAD File

    SANDPIPER can provide you with a CAD file to save time and improve the quality of your final design, as well as reduce measurement and documentation packet errors. Contact us today to request yours.


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