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Neptune's technical innovations, backed by solid customer support, builds confidence in our complete portfolio of products, delivering peace of mind reliability to our end users.

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Single-source, end-to-end solutions

Neptune delivers pump systems for use in the reliable and safe handling of chemical fluids used for water treatment applications in municipalities, general industries and agriculture.

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MP7100 Series

The Neptune Series MP7100 is a mechanically-actuated diaphragm metering pump engineered from the ground up to be more robust and durable than similar mechanical diaphragm pump designs. The MP7100 pump incorporates the ruggedness of a hydraulic diaphragm metering pump, eliminates the need for intermediate fluid or hydraulic oil to actuate the diaphragm and eliminates the potential for gearbox oil to contaminate the process since it has an oil free gearbox design.

The straight-through flow design of the MP7100 liquid end and the elimination of the contour plate result in improved flow characteristics, making the pump well-suited for pumping difficult chemicals such as viscous fluids, shear-sensitive fluids and fluids with suspended solids.

Liquid Head Materials of Construction
  • 316SS
  • PVC
  • PVDF
  • PTFE
  • 9 gph (34 L/h) to 286 gph (1,083 L/h)
Max Pressure
  • 235 psi (16.2 bar)
Max Temperature
  • 316SS - 200°F (93°C)
  • PVC - 125°F (52°C)
  • PVDF - 125°F (52°C)
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Features and Benefits

  • Suction-lift exceeding 20 ft. (6 m) on water-like chemicals
  • Heavy-duty, corrosion-resistant aluminum gearbox
  • Finned gearbox design dissipates heat more efficiently than other designs
  • Rugged bronze gears are quiet-running and provide long service life
  • Oversize check valves improve performance and minimize friction losses
  • Short stroke length reduces diaphragm stress and promotes longer diaphragm life
  • 10:1 turndown via micrometer-type knob with high-contrast, easy-to-read scale
  • Repeatable accuracy is ±2% at full scale (at constant hydraulic conditions)