Yamada® NDP-50 Series Double Diaphragm Pumps

Yamada® NDP-50 series Air Powered Double Diaphragm (AODD) pumps provide a maximum flow rate of 166 gallons per minute. Pumps are available in aluminum, stainless steel (316), cast iron, polypropylene, and Kynar construction, with a wide variety of diaphragm materials.

164.0 Gallons/Minute Max.
2″ Fluid Port (NPT or ANSI Flange)

Intake & Discharge Connections

Polypropylene (PPG): 2″ ANSI Flange B16.5 #150

Kynar® (PVDF): 2″ ANSI Flange B16.5 #150

Aluminum (ADC-12): 2″ ANSI Flange B16.5 #150 (with tapped 2″ Female NPT)

Stainless Steel (316): 2″ ANSI Flange B16.5 #150 or 2″ Female NPT

Cast Iron: 2″ Female NPT

Air Inlet

3/4″ Female NPT (includes ball valve)

Air Exhaust

1″ Female NPT (includes silencer)

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. Kynar® pumps have a maximum temperature of 248°F (120°C) when fitted with Hytrel® or Viton® diaphragms.

Air Supply Pressure (All Models)

20 to 100 PSI (1.4 to 7 kgf/cm²)

Discharge Volume Per Cycle

Rubber diaphragm: 1.14 gallons (4.3 liters)

PTFE diaphragm: 0.55 gallons (2.1 liters)

Maximum Cycles Per Minute

Rubber diaphragm: 146

PTFE diaphragm: 220

Maximum Size Solid

5/16″ (8 mm)

Maximum Dry Suction Lift

Rubber-fitted pump capability: 19-feet

Air Motor

Standard: Aluminum

Optional Coating

PTFE-coated

Weight and Dimensions

Notes

All Polypropylene, Aluminum, Cast Iron, and SS 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.

Kynar® (PVDF) pumps fitted with Santoprene®, Hytrel®, or PTFE include PTFE check balls and o‑rings. Kynar®/EPDM fitted pumps include EPDM check balls and o‑rings. Viton® fitted pumps include Viton® check balls and o‑rings.