Yamada NDP-20 Series

28.0 GPM Maximum Flow Rate

Compatible fluid connections:
0.75" fluid port

Yamada® NDP-20 series Air Powered Double Diaphragm (AODD) pumps provide a maximum flow rate of 28 gallons per minute. Diaphragm Pump of Yamada are available in aluminum, stainless steel (316), and polypropylene construction, with a wide variety of diaphragm materials.

  • Intake & Discharge Connections:

    Polypropylene (PPG): 3/4" Female NPT or 3/4" ANSI Flange B16.5 #150
    Aluminum (ADC-12): 3/4" Female NPT
    Stainless Steel (316): 3/4" Female NPT

  • Air Inlet:

    3/8" Female NPT (includes ball valve)

  • Air Exhaust:

    3/4" Female NPT (includes silencer)

  • Air Supply Pressure (All Models) :

    20 to 100 PSI (1.4 to 7 kgf/cm²)

  • Discharge Volume Per Cycle:

    Rubber diaphragm: 0.163 gallons (615 cc) PTFE diaphragm: 0.143 gallons (539 cc)

  • Maximum Cycles Per Minute:

    Rubber diaphragm: 195
    PTFE diaphragm: 195

  • Maximum Size Solid:

    1/16" (2.0 mm)

  • Maximum Dry Suction Lift:

    Rubber-fitted pump capability: 18-feet

  • Air Motor:

    Standard: Aluminum

  • Optional Coating:

    PTFE-coated

  • Notes:

    Hytrel® fitted pumps include Hytrel® check balls and Buna N wetted o‑rings. Santoprene® fitted pumps include Santoprene® check balls and EPDM wetted o‑rings.

  • Maximum Liquid Temperature*:

    Diaphragm Material / Temperature
    Buna N: 180°F (82°C)
    Neoprene: 180°F (82°C)
    Santoprene® (TPO) 180°F (82°C)
    EPDM: 212°F (100°C)
    PTFE 212°F (100°C)
    Hytrel® (TPE) 248°F (120°C)
    Viton® fluoroelastomer 248°F (120°C)
    *Polypropylene pumps have a maximum liquid temperature of 180°F (82°C) regardless of diaphragm material.

  • Weight and Dimensions:

    Aluminum
    Dimensions: 9.80" W x 12.60" H
    Net Weight: 19.8 lbs. (9.0 kg)
    Shipping Weight: 23 lbs.

    Polypropylene
    Dimensions (ANSI flange): 12.44" W x 14.75" H
    Net Weight: 17.6 lbs. (8.2 kg)
    Shipping Weight: 22.6 lbs.

    Dimensions (NPT): 12.44" W x 14.50" H
    Net Weight: 17.6 lbs. (8.2 kg)
    Shipping Weight: 22.6 lbs.

    Stainless Steel
    Dimensions: 9.80" W x 12.60" H
    Net Weight: 30.8 lbs. (13.9 kg)
    Shipping Weight: 32 lbs.