Diaphragm Pumps Ltd

Yamada NDP-15 Series Pumps

15 GPM Maximum Capacity - 1/2" Port Size

Port Dimensions

Intake & discharge connection
• Polypropylene (PPG)* 1/2" Female NPT
• Kynar (PVDF)** 1/2" Female NPT
• Aluminum (ADC-12)*** 1/2" Female NPT
• Stainless Steel (316)*** 1/2" Female NPT

*Polypropylene pumps may be fitted with ball or flat check valves. Ball-type check valves are recommended for flooded suction applications. Flat-type check valves are recommended for suction lift applications.

**Kynar pumps are fitted with flat check valves only.

***Aluminum and Stainless Steel pumps are fitted with ball check valves only.

Air inlet
• 1/4" Female NPT (includes ball valve)
Air exhaust
• 3/8" Female NPT (internal silencer)

Maximum Liquid Temperature****

Diaphragm Material / Temperature
• Neoprene: 180°F (82°C)
• Buna N: 180°F (82°C)
• Hytrel: 248°F (120°C)
• Santoprene: 225°F (107°C)
• Viton: 248°F (120°C)
• Teflon: (PTFE) 212°F (100°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 kfg/cm)

Discharge Volume Per Cycle

Flat-type check valve
• 0.0375 gallons (138 cc)
Ball-type check valve
• 0.031 gallons (119 cc)

Maximum Cycles Per Minute

• All diaphragms: 400

Maximum Size Solid

• 1/32" (1 mm)

Maximum Dry Suction Lift

• Flat-type check valve: 8-feet
• Ball-type check valve: 5-feet

Pump Air Motor

• Ryton air motor standard

Notes: Hytrel-fitted pumps include Buna N check balls & wetted o-rings. Santoprene-fitted pumps include EPDM check balls & wetted o-rings.

Click Here for the NDP5 & NDP15 Maintenance Manual