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  • SANDPIPER Heavy Duty Flap Valve SA1-1 pump

    • Port Size: SA1: 1” NPT or SA25: 1" BSP (Tapered)
    • Capacity: 0 to 42 gpm (159 lpm)
    • Solids-Handling: Up to 1" (25.4 mm)
    • Displacement/Stroke: .10 gallons (.38 liters)

    SA1 Heavy Duty Flap Valve Pumps are recommended for abrasive slurries, suspended and non-suspended solids and line-size solids. All SANDPIPER® Heavy Duty Flap Pumps are configured with bottom discharge porting to prevent settling solids from shortening pump life and provide superior suction lift. SA1 pumps are thick wall constructed of Sand Casted Aluminum, Cast Iron and Stainless Steel with elastomer and TPE (thermal plastic elastomer) diaphragms and check valves. See tabs below for a complete description.

  • SANDPIPER Heavy Duty Flap Valve HDF1 pump

    • Port Size: HDF1: 1” NPT or HDF25: 1” BSP (Tapered)
    • Capacity: 0 to 70 gpm (265 lpm)
    • Solids-Handling: Up to 1" (25.4 mm)
    • Displacement/Stroke: .10 gallons (.38 liters)

  • SANDPIPER Heavy Duty Flap Valve HD20F pump

    • Port Size: • 2” NPT (Internal) • 2” BSP (Tapered) • 2” ANSI • 2” DIN Flange
    • Capacity: 0 to 150 gpm (567 lpm)
    • Solids-Handling: Up to 1.8" (46 mm)
    • Heads Up To: 100 psi or 231 ft. of water (7 bar or 70 meters)
    • Displacement/Stroke: .50 gallons (1.9 liters)
    • Max Operating Pressure: 100 psi (7 bar)

    The Heavy Duty Non-Metallic Flap Valve Air Operated Diaphragm Pumps from Sandpiper are robust, yet lightweight. They are easy to maintain with flap valve chambers that can be removed for inspection and cleaning without removing the manifolds and the ESADS+Plus (Externally Servicable Air Distribution System).


    The flaps have positive pressure so that the pump can work in almost any position and handle solids laden fluids. The lightweight and durable design makes them ideal for mine and construction applications.



  • SANDPIPER Heavy Duty Flap Valve HDF2 pump

    • Port Size: 2" NPT
    • Capacity: 0 to 140 gpm (530 lpm)
    • Air Distribution Valve: No-lube, no-stall design
    • Solids-Handling: Up to 2" (50 mm)
    • Displacement/Stroke: 0.43 gallons (1.6 liters)

  • SANDPIPER Heavy Duty Flap Valve HDF3-A pump

    • Port Size: 3" ANSI
    • Capacity: 0 to 260 gpm (988 lpm)
    • Air Distribution Valve: No-lube, no-stall design
    • Solids-Handling: Up to nearly 3" (75 mm)
    • Displacement/Stroke: .026 gallons (.098 liters)

  • SANDPIPER Heavy Duty Flap Valve HDF3-M pump

    • Port Size: 3" ANSI
    • Capacity: 0 to 260 gpm (988 lpm)
    • Air Distribution Valve: No-lube, no-stall design
    • Solids-Handling: Up to nearly 3" (75 mm)
    • Displacement/Stroke: .026 gallons (.098 liters)

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