SolidPRO Solids Diaphragm Pump

Yamada® SolidPRO® Solids Handling Diaphragm Pump

SolidPRO® pumps, manufactured by Yamada®, are specifically engineered to efficiently pump fluids that contain solids up to 2 inches (50mm) in diameter. These pumps are constructed using the reliable and established NDP-Series line of pumps as their foundation. With Yamada's patented stall-free/lube-free air valve technology and a robust bolted construction that's easy to service, SolidPRO® pumps are built to withstand demanding pumping applications.


Top Manifold = Suction Inlet
Bottom Manifold = Discharge Outlet
Designed to keep solids from settling in the pump.

Designed for durability in the field, the SolidPRO pump's are manufactured with innovative flap-type check valve technology provides streaming passage of solids while minimizing clogging and downtime. Four external bolts release valve covers on either side permitting service and maintenance without removing the pump from installation.


Design Features

  • Heavy-duty flap check valve permits passage of solids up to 2 inches
  • Easy access to valve chambers for ease of maintenance
  • Vented diaphragm chambers alleviate problems associated with trapped air/gas
  • In-line maintenance facilitates servicing pump without removal from installation
  • Top-Suction Inlet / Bottom-Discharge Outlet design keeps solids from settling in pump
  • Non-lubricated air valve
  • Bolted construction
  • Short-stroke technology improves diaphragm life
  • Outside-accessible air valve
  • Modular pilot valve design requires no dynamic O-rings to replace or repair



Model Number: NDP-50FAN*
Nominal Diameter: 2 inch (50 mm)
Maximum Discharge Volume: 158.5 Gallons/min.
Fluid Connections Suction: NPT 2 or ANSI flange
150# 2" equivalent
Discharge: NPT 2 or ANSI flange
150# 2" equivalent
Air Connection Supply: NPT 3/4"
Exhaust: NPT 1"
Normal Air Supply Pressure: 30–100 PSI (2~7 kgf/cm²)
Maximum Discharge Pressure: 100 PSI (0.7 MPa)
Discharge Volume per Cycle: 0.63 GPM (2.3 L/min)
Slurry Limitation: Maximum 2" solids
Maximum Operating Noise: 94dB
Weight: 115 lbs (52 kg)
*Additional Materials Available


Model # Description
854251 NDP-50FAN
854251-TPO NDP-50FAS


:: Aluminum 
Dimensions: 27.91" W x 32.59" H
Net Weight: 115 lbs. (52 kg)
Shipping Weight: 130 lbs.

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