Yamada® NDP-25 series Air Powered Double Diaphragm (AODD) pumps provide a maximum flow rate of 49 gallons per minute. Pumps are available in aluminum, stainless steel (316), cast iron, polypropylene, and Kynar construction, with a wide variety of diaphragm materials.
46.2 Gallons/Minute Max.
1" Fluid Port (NPT or ANSI Flange)
Intake & Discharge Connections
Polypropylene (PPG): 1" Female NPT or 1" ANSI Flange B16.5 #150
Kynar® (PVDF): 1" Female NPT or 1" ANSI Flange B16.5 #150
Aluminum (ADC-12): 1" Female NPT
Stainless Steel (316): 1" Female NPT
Cast Iron: 1" Female NPT
Air Inlet
3/8" Female NPT (includes ball valve)
Air Exhaust
3/4" 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: 0.23 gallons (862 cc)
PTFE diaphragm: 0.17 gallons (654 cc)
Maximum Cycles Per Minute
Rubber diaphragm: 210
PTFE diaphragm: 210
Maximum Size Solid
3/16" (4.8 mm)
Maximum Dry Suction Lift
Rubber-fitted pump capability: 18-feet
Air Motor
Standard: Aluminum
Optional Coating
PTFE-coated
Weight and Dimensions
Dimensions: 11.30" W x 15.08" H
Net Weight: 27 lbs. (13.0 kg)
Shipping Weight: 31 lbs.
Dimensions (ANSI flange):
14.40" W x 17.40" H
Net Weight: 29 lbs. (10.9 kg)
Shipping Weight: 30 lbs.
Dimensions (NPT): 14.40" W x 16.90" H
Net Weight: 29 lbs. (10.9 kg)
Shipping Weight: 30 lbs.
Dimensions (ANSI flange):
14.40" W x 17.40" H
Net Weight: 29.7 lbs. (13.4 kg)
Shipping Weight: 33 lbs.
Dimensions (NPT): 14.40" W x 16.90" H
Net Weight: 29.7 lbs. (13.4 kg)
Shipping Weight: 33 lbs.
Dimensions: 11.30" W x 15.08" H
Net Weight: 43 lbs. (19.9 kg)
Shipping Weight: 46 lbs.
Dimensions: 11.30" W x 15.08" H
Net Weight: 43 lbs. (19.9 kg)
Shipping Weight: 46 lbs.
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.
:: NDP-25 Literature
:: NDP-25 Maintenance Manuals
:: NDP-25 CAD Drawings
NDP-25 Aluminum NPT
NDP-25 Cast Iron, NPT
NDP-25 Stainless Steel, NPT
NDP-25 Kynar®, Flange
NDP-25 Kynar®, NPT
NDP-25BP-PP Poly, Flange
NDP-25BV-PP Poly, Flange
NDP-25 Polypropylene, Flange
NDP-25 Polypropylene, NPT
:: NDP-25 3D CAD Drawings
EPRT Format
NDP-25 Aluminum
NDP-25 Cast Iron
NDP-25 Stainless Steel NPT
NDP-25 Kynar® Flange
NDP-25 Kynar® NPT
NDP-25 Polypropylene Flange
NDP-25 Polypropylene NPT
IGS Format
NDP-25 Aluminum
NDP-25 Cast Iron
NDP-25 Stainless Steel NPT
NDP-25 Kynar® Flange
NDP-25 Kynar® NPT
NDP-25 Polypropylene Flange
NDP-25 Polypropylene NPT
:: NDP-25 Performance Curves
:: NDP-25 Bill of Materials
:: NDP-25 Model Nomenclature
Yamada® is a registered trademark of Yamada America, Inc. Hytrel® is a registered trademark of E.I. du Pont de Nemours and Company. Santoprene® is a registered trademark of Advanced Elastomer Systems. Viton® is a registered trademark of DuPont Performance Elastomers. Due to Yamada's continued commitment to product improvement, specifications may change without notice.