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Series MP7100 Mechanically Actuated Diaphragm Metering Pump


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.

  • Heavy-duty, corrosion-resistant, aluminum gearbox
  • Gears operate in an oil bath for longer life
  • 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
  • Superior performance when pumping chemicals such as sodium hypochlorite, which can off-gas
  • Suction-lift exceeding 20 ft. (6m) on water-like chemicals
  • Capacities to 275 gph (1041 lph)
  • Operating pressures to 235 psi (16 bar)
  • 10:1 turndown via micrometer-type knob with high-contrast, easy-to-read scale
  • Repeatable metering accuracy is ± 2% of full scale (at constant hydraulic conditions)
  • Rugged, PTFE-faced, pre-formed composite diaphragm with steel backing plate assures volumetric accuracy throughout the capacity range
  • Pump capacity can be easily adjusted while pump is running
  • Lockable micrometer knob prevents drift
  • Optional automatic speed control with variable frequency or SCR drive
  • All models include standard NEMA 56C or an optional IEC motor adapter