Yamada Pump NDP-25BAT

The Yamada NDP-25BAT is a heavy-duty 1-inch air operated diaphragm pump engineered for chemical transfer, solvent handling, paint spraying, and industrial fluid processing. Featuring an all-aluminum body, an aluminum air motor, and chemical-resistant PTFE (Teflon) elastomers, this high-performance Yamada AODD pump delivers reliable, stall-free operation at flow rates up to 46.2 GPM.

Built with Yamada’s signature leak-free bolted construction, this 1" AODD pump avoids the misalignments and fluid leakage common to standard clamp-band designs. Its patented non-lubricated C-spool air valve design features an externally accessible air motor, enabling quick in-line maintenance and inspection without disconnecting the pump from service—maximizing uptime and reducing operational overhead.

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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.