NDP-40 Series

Air Powered Double Diaphragm Pumps

Yamada Trial Pump Program

1-1/2" Fluid Port

Yamada® NDP-40 series AODD pumps provide a maximum flow rate of 107 gallons per minute. Pumps are available in aluminum, stainless steel (316), Kynar® (PVDF), groundable acetal, and polypropylene construction.

What separates Yamada from the rest of the pack is our air valve technology. Yamada uses a completely non-lubricated main air valve and independent pilot mechanisms to control the air logic.

As compressed air enters the pump, it is directed via the main air valve to one side or the other, depending upon the starting position of the c-spool.  As the air enters the chamber, it forces the diaphragm outward. This outward momentum forces liquid out of the discharge ball valve and loads the opposite inlet ball valve. As the diaphragm travels outward, the connected diaphragm on the opposite side is pulling the diaphragm inward.

When it travels a full stroke, it will contact the pilot valve, depressing it and breaking the seal to open an exhaust port.

The open port allows the compressed air to the exhaust from the back side of the air valve. The pressure drop produces a shift of the main air valve. This motion simply repeats on the other side.

 OPTIONS > Ultimate Diaphragms, Abrasion Pads



107 Gallons/Minute
1-1/2" Fluid Port (NPT or ANSI Flange)


Intake & Discharge Connections
Polypropylene (PPG)
1-1/2" ANSI Flange B16.5 #150
Kynar® (PVDF) 1-1/2" ANSI Flange B16.5 #150
Aluminum (ADC-12) 1-1/2" ANSI Flange B16.5 #150 (with tapped 1-1/2" Female NPT)
Stainless Steel (316) 1-1/2" ANSI Flange B16.5 #150 or 1-1/2" Female NPT
Cast Iron 1-1/2" Female NPT
Air Inlet 1/2" Female NPT (includes ball valve)
Air Exhaust 1" Female NPT (includes silencer)


Diaphragm Maximum Liquid Temperature1
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)
Ultimate 212°F (100°C)
*The maximum liquid temperature for metal and Kynar® fitted pumps 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)
Discharge Volume Per Cycle

Rubber diaphragm: 0.73 gallons (2.74 liters)
PTFE diaphragm: 0.37 gallons (1.40 liters)

Maximum Cycles Per Minute

Rubber diaphragm: 148
PTFE diaphragm: 270

Maximum Size Solid 9/32" (7 mm)
Maximum Dry Suction Lift Rubber-fitted pump capability: 18-feet
Air Motor Standard: Aluminum
Optional Coating PTFE-coated


Model # Description
852417 NDP-40BAC
852220 NDP-40BAN
852418 NDP-40BAE
852221 NDP-40BAH
852709 NDP-40BAS
852300 NDP-40BAV
852222 NDP-40BAT
852222-U NDP-40BAU
852419 NDP-40BSC
852223 NDP-40BSN
852420 NDP-40BSE
852224 NDP-40BSH
852710 NDP-40BSS
852301 NDP-40BSV
852225 NDP-40BST
852225-U NDP-40BSU
852641 NDP-40BSC-NPT
852637 NDP-40BSN-NPT
852642 NDP-40BSE-NPT
852638 NDP-40BSH-NPT
852712 NDP-40BSS-NPT
852640 NDP-40BSV-NPT
852639 NDP-40BST-NPT
852639-U NDP-40BSU-NPT
852873 NDP-40BFC
852869 NDP-40BFN
852874 NDP-40BFE
852870 NDP-40BFH
852875 NDP-40BFS
852872 NDP-40BFV
852871 NDP-40BFT
852871-U NDP-40BFU
852421 NDP-40BPC
852226 NDP-40BPN
852422 NDP-40BPE
852227 NDP-40BPH
852711 NDP-40BPS
852302 NDP-40BPV
852228 NDP-40BPT
852228-U NDP-40BPU
853798 NDP-40BVS
853797 NDP-40BVT
853797-U NDP-40BVU


:: Aluminum
Dimensions: 16.20" W x 27.96" H
Net Weight: 63.9 lbs. (29 kg)
Shipping Weight: 73.9 lbs.
:: Polypropylene (ANSI flange)
Dimensions: 15.83" W x 29.60" H
Net Weight: 59.5 lbs. (27 kg)
Shipping Weight: 69.5 lbs.
:: Kynar® (PVDF) (ANSI flange)
Dimensions: 15.67" W x 29.49" H
Net Weight: 70.5 lbs. (32 kg)
Shipping Weight: 80.5 lbs.
:: Cast Iron
Dimensions: 16.20" W x 27.72" H
Net Weight: 103.6 lbs. (47 kg)
Shipping Weight: 113.6 lbs.
:: Stainless Steel (NPT)
Dimensions: 16.20" W x 27.66" H
Net Weight: 88.2 lbs. (40 kg)
Shipping Weight: 98.2 lbs.
:: Stainless Steel (ANSI flange)
Dimensions: 16.20" W x 27.74" H
Net Weight: 88.2 lbs. (40 kg)
Shipping Weight: 98.2 lbs.


Air Motor Kit


Liquid End Kits
  Aluminum: K40-MC, K40-MN, K40-ME, K40-MH, K40-MS, K40-MV, K40-MT, K40-MU
  Stainless Steel: K40-MC, K40-MN, K40-ME, K40-MH, K40-MS, K40-MV, K40-MT, K40-MU
  Cast Iron: K40-MC, K40-MN, K40-ME, K40-MH, K40-MS, K40-MV, K40-MT, K40-MU
  Polypropylene: K40-PC, K40-PN, K40-PE, K40-PH, K40-PS, K40-PV, K40-PT, K40-PU
  Kynar: K40-VS-1, K40-VT-1, K40-VU-1
Filter / Regulators

FR-4, FR-4A (Auto Drain)


AD-40 Series

Liquid Level Controller




Diaphragm Monitor System


DRy Run Detector


The Yamada Advantage

Yamada Air Powered Double Diaphragm Pumps: Engineered for High Performance. Manufactured for Long Life.

Rugged, Bolted Construction

All Yamada pumps feature bolted construction, which eliminates leaks and simplifies post-maintenance reassembly. Bolted construction is superior to clamp band retainers, which frequently require frustrating, unnecessary leakage rebuilds from misalignment during reassembly.

Outside-Accessible Air Valve

Inspection or maintenance of every Yamada air valve may be performed without removing the pump from service. Outside accessible, making it easy to fix / inspect.

Unified Air Valve Concept

Common-size air valve assemblies reduce parts confusion and inventory.

Pilot Valve

Unique to the Yamada design is an individual modular pilot valve that actuates the air valve. It is depressed slightly by the inner center disk creating a pressure drop at one end of the air valve, allowing shifting to occur. It is maintenance free with no cumbersome snap rings or lubricated dynamic o-rings to replace or repair.

Patented Air Valve Technology

Incorporated in every Yamada Air Powered Double Diaphragm pump

Yamada air valve technology is the heart of the air-powered double diaphragm pump and determines reliability. Yamada holds three patents on its field proven valve and enjoys a superior reputation throughout the industry.

Why Specify an AODD Pump?

  • Handles a wide variety of fluids with high solids content
  • Self Priming
  • Ability to Run Dry
  • Variable flow rate and discharge pressure
  • Portable
  • Simple Installation
  • Dead Head
  • Shear Sensitive
  • Safe Operation
  • Submersible
  • Pumping efficiency remains constant
  • Cannot Overheat
  • High Pressure capabilities
  • No mechanical seals, couplings or motors
  • No pressure relief or bypass needed

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