Yamada Pump NDP-800BSE NPT

The Yamada NDP-800BSE NPT is a heavy-duty, ultra-high-capacity 3-inch air-operated double diaphragm pump built for demanding high-volume fluid transfer and harsh industrial processing. Equipped with female 3-inch NPT threaded connections, it integrates cleanly and securely into high-flow threaded piping networks. Featuring a cast 316 stainless steel housing paired with resilient EPDM diaphragms, this pump offers excellent mechanical strength, outstanding resistance to hot water, steam, alcohols, and caustic solutions, and superior thermal durability during continuous duty.

Powered by Yamada’s patented, oil-free C-Spool air-valve technology with a built-in reset button, the NDP-800BSE guarantees stall-free operation without requiring air motor lubrication or excessive maintenance. Capable of delivering maximum flow rates exceeding 300 GPM while passing suspended solids up to 13/32” (10 mm), this seal-less liquid handling solution is ideally suited for wastewater management, chemical washdown systems, water treatment, and demanding industrial utility applications.

3" Fluid Port (NPT or ANSI Flange)

NDP-800 Series: Excess of 300Gallons Per Minute

NDP-80 Series: 215 Gallons Per Minute

Intake & Discharge Connections

Polypropylene (PPG): 3" ANSI Flange B16.5 #150 (NDP-80)
Aluminum (ADC-12): 3" ANSI Flange B16.5 #150 (with tapped 3" Female NPT) (NDP-80)
Stainless Steel (316): 3" ANSI Flange B16.5 #150 (NDP-80/NDP-800)
3" Female NPT (NDP-800)
Cast Iron: 3" Female NPT (NDP-80)

Air Inlet: 3/4" Female NPT (includes ball valve)
Air Exhaust: 1" 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)

*The maximum liquid temperature for metal 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) (NDP-80)
20 to 120 PSI (NDP-800)

Discharge Volume Per Cycle

Rubber diaphragm: 2.26 gallons (8.57 liters) (NDP-80)
PTFE diaphragm: 1.0 gallons (3.8 liters) (NDP-80)

Maximum Cycles Per Minute

Rubber diaphragm: 95 (NDP-80)
PTFE diaphragm: 160 (NDP-80)

Maximum Size Solid: 13/32" (10 mm)

Maximum Dry Suction Lift: Rubber-fitted pump capability: 19-feet

Air Motor
Standard: Aluminum
Optional Coating: PTFE-coated

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.