Yamada Pump NDP-800BSV NPT

The Yamada NDP-800BSV NPT is a heavy-duty, ultra-high-capacity 3-inch air-operated double diaphragm pump engineered for demanding high-volume fluid transfer and severe chemical environments. Equipped with female 3-inch NPT threaded connections, it offers a secure, leak-free connection tailored for heavy-duty threaded piping systems. Featuring a cast 316 stainless steel housing paired with high-performance FKM (Viton) diaphragms, this pump provides maximum dynamic sealing, exceptional thermal durability, and superior resistance to aggressive chemicals, acids, hydrocarbons, and harsh solvents.

Powered by Yamada’s patented, oil-free C-Spool air-valve technology with a built-in reset button, the NDP-800BSV NPT guarantees reliable, stall-free operation without requiring air motor lubrication or high maintenance downtime. Capable of delivering maximum flow rates exceeding 300 GPM while passing suspended solids up to 13/32” (10 mm), this seal-less liquid handling unit is an ideal solution for chemical processing, petrochemical refining, solvent recovery, and corrosive fluid handling across industrial 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.