Yamada® NDP-50 Series


Yamada® NDP-50 Series

Tuesday, March 12, 2024
Yamada® NDP-50 Series image


Yamada® NDP-50 series AODD pumps provide a maximum flow rate of 164 gallons per minute. Pumps are available in aluminum, stainless steel (316), Kynar® (PVDF), groundable acetal, and polypropylene construction.

Our air valve technology separates Yamada from the rest of the pack. Yamada uses a non-lubricated main air valve and independent pilot mechanisms to control the air logic.

As compressed air enters the pump, it is directed via the main air valve to one side or the other, depending upon the starting position of the c-spool.  As the air enters the chamber, it forces the diaphragm outward. This outward momentum forces liquid out of the discharge ball valve and loads the opposite inlet ball valve. As the diaphragm travels outward, the connected diaphragm on the opposite side pulls the diaphragm inward.

When it travels a full stroke, it will contact the pilot valve, depressing it and breaking the seal to open an exhaust port.

The open port allows the compressed air to the exhaust from the back side of the air valve. The pressure drop produces a shift of the main air valve. This motion simply repeats on the other side.


164 Gallons/Minute
2" Fluid Port (NPT or ANSI Flange)


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)


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)
Ultiimate 212°F (100°C)
*The maximum liquuid temperature for metal and Kynar® fitted pumps is determined by the elastomer (diaphragm material). Polypropylene pumps have a maximum liquid temperature of 180°F (82°C) regardless of diaphragm material. 


Air Supply Pressure (All Models) 20 to 100 PSI (1.4 to 7 kgf/cm²)
Discharge Volume Per Cycle

Rubber diaphragm: 1.12 gallons (4.25 liters)
PTFE diaphragm: 0.69 gallons (2.61 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

Aluminum - Metal or Plastic Pumps
Plastic - Plastic Pumps

Optional Coating PTFE-coated

Great Lakes Pump and Supply
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Great Lakes Pump & Supply Co.
1075 Naughton
Troy, MI 48083
Phone: 248-528-9100

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