Yamada Pump NDP-25BAN

The Yamada NDP-25BAN is a high-performance 1-inch aluminum air operated diaphragm pump engineered for demanding industrial fluid transfer. Powered by patented non-lubricated C-spool air valve technology, this heavy-duty Yamada AODD pump delivers reliable, stall-free operation at flow rates up to 46.2 GPM.

Built with rugged bolted construction and durable Buna-N internals, it eliminates the leaks and alignment issues common with traditional clamp-band designs. Whether handling light oils, wastewater, inks, or general chemical applications, this 1" air operated diaphragm pump pump provides maximum operational efficiency. Its externally accessible air valve allows for quick in-line maintenance without removing the pump from service, ensuring minimal downtime and long-term durability.

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-46.2 Gallons/Minute (NDP-25)

-40.1 Gallons/Minute (G25)

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: 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)
  
  

Diaphragm Maximum Liquid Temperature1

N: Buna N 180°F (82°C)
C: Neoprene 180°F (82°C)
S: Santoprene®(TPO) 180°F (82°C)
E: EPDM 212°F (100°C)
T: PTFE 212°F (100°C)
H: Hytrel®(TPE) 248°F (120°C)
V: Viton®fluoroelastomer 248°F (120°C)
U: Ultimate 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 kgf/cm²)

Discharge Volume Per Cycle:
Rubber diaphragm: 0.23 gallons (862 cc) (NDP) | 0.158 gallons (G25)
PTFE diaphragm: 0.17 gallons (654 cc) (NDP) | 0.118 gallons (G25)

Maximum Cycles Per Minute
Rubber diaphragm: 210 (NDP) 253 (G25)
PTFE diaphragm: 210 (NDP) 297 (G25)

Maximum Size Solid1/8" (3 mm) 
Maximum Dry Suction Lift: Rubber-fitted pump capability: 18-feet
Air Motor: Aluminum - Metal PumpsPlastic - Plastic PumpsOptional CoatingPTFE-coated (NDP)

Yamada Air-Operated Double Diaphragm Pumps

Engineered for High Performance. Manufactured to Last.

• Leak-Free Bolted Construction: Built for heavy-duty reliability, Yamada’s bolted design ensures precise alignment and effortless reassembly—eliminating the leaks and tedious rebuilds common with clamp-band retainers.
• Externally Accessible Air Valve: Perform quick inspections or routine maintenance directly in-line, without taking the pump out of service.
• Unified Valve Architecture: Standardized air valve assemblies across pump models reduce part confusion and lower inventory overhead.
• Maintenance-Free Pilot Valve: Yamada’s unique modular pilot valve uses an inner center-disk mechanism to trigger valve shifting with zero hassle. Free of dynamic O-rings or awkward snap rings, it requires no routine repairs.

Order by 2PM to get delivered next working day! (Available with NDA shipping Charges on In-stock items) We use 24 hours service with carriers in most cases so that you can get your order delivered on time.

Call (225)-454-0860 to confirm shipping cost and delivery time.