SH2-M Metallic 2" (50 mm) 2:1 High Pressure – Flap Valve Pump


    The SH2-M pump is a 2:1 ratio, high-pressure, single-acting diaphragm pump powered via compressed air. As the only high-pressure, air-operated diaphragm flap valve pump in the world, the unit can deliver discharge pressures twice the inlet pressure up to 250 psig (17.2 barg).

    The pump can be utilized in filter press feeds and other demanding applications requiring higher discharge pressures and/or solids handling that most air-operated single-diaphragm (AOD) pumps are not capable of achieving.

    This pump is engineered with metallic seats and heavy-duty flap valves to help ensure a durable valve seal for performance in high-pressure applications. Unlike other high-pressure pumps on the market, the SANDPIPER SH2-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–this effectively decreases downtime and ultimately lowers the total cost of ownership.

    The SH2-M high-pressure pump is available in both aluminum and cast iron with various diaphragm (elastomer) options. Other features include:

    • Solids handling
      • Handling solids up to 1.8" (45 mm) in diameter, it is the only high-pressure flap valve pump in the world.
    • Heavy duty
      • Bolted construction and made with robust materials
    • Suction stroke control
      • Independently regulated suction stroke allows for optimum stroke control
    • ESADS+ air distribution system
      • SANDPIPER is the only AODD pump manufacturer to offer an externally serviceable air distribution system, allowing 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), reducing your downtime by as much as 90%.

    Chemical Compatibility Guide

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

    CE logo ATEX EAC SP Evolution logo ISO Logo


    Port Size 2" NPT
    Capacity 0 to 120 gpm (454 lpm)
    Air Distribution Valve No-lube, no-stall design
    Solids-Handling Up to 1.8" (46 mm)
    Heads Up To 250 psi or 577 ft of water (17 bar or 176 meters)
    Displacement/Stroke .3 gallons (1.1 liters)
    Max Operating Pressure 125 psi (8.6 bar)
    Shipping Weight
    Cast Iron

    138 lbs (63 kg)
    150-160 lbs (68-73 kg)




    SH2-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.


    Let’s Discuss Your Project

    You have complex industrial challenges and we have problem-solving expertise to find the solutions that fit your needs. When you schedule a consultation with SANDPIPER, we will:

    • Have a conversation about the challenges you’re facing
    • Tell you about other customers we’ve worked with and give you data that proves the effectiveness of our pumps
    • Set up an in-person meeting if warranted
    • Find the products that will perfectly match your application requirements

    Scheduling a consultation will give you the information you need to make a decision about selecting an AODD pump manufacturer you can partner with who will provide safe, reliable and energy-efficient solutions. Fill out the form to schedule your consultation.

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