Vapor Compression for Desalination

In 1939, MECO patented the vapor compression process for the desalination of saltwater. Since then, we’ve refined and improved the technology to deliver high-quality potable drinking water and distilled water in some of the world’s harshest environments. And since MECO has installations worldwide, you have access to a global service network that can respond quickly to emergencies and service maintenance needs.


Technical Data
PEE2100M3C2,100 [8]
PEE2750M3C2,750 [10]
PEE5500M3C5,500 [21]
PEE6600M3C6,600 [25]
PEE7500M3C7,500 [28]
PEE10000M3C10,000 [38]
PEE15000M3C15,000 [57]
PEE20000M3C20,000 [76]

Notes: Capacities are based on seawater with a TDS of 35,000 ppm at 77°F (25°C). MECO M3C units typically operate based on a concentration ratio of 1.77.


  • Leading manufacturer of vapor compression desalination plants
  • Produces potable drinking water and high-quality distilled water
  • Completely packaged units for minimum field installation
  • Superior energy efficiency
  • Offers the largest vapor compression still available capacity of 20,000 gallons per hour
  • All components manufactured by MECO
  • Spare parts also available
  • Supported by MECO 24-hour customer service
  • Backed by warranty
Standard Features
  • Vertical natural circulation evaporator
    • Feedwater quality tolerance
    • Scale effects reduced
    • No pumps or spray nozzles
  • Straight annealed tubes in evaporator
    • Individual tubes can be replaced as opposed to replacing the entire tube bundle
    • No residual stresses or surface finish problems commonly found with U-tubes
  • Deaeration of feedwater
    • Non-condensibles removed prior to distillation
    • Corrosion reduction
  • Corrosion resistant materials
    • 90/10 copper nickel
    • Titanium
    • Inconel
    • Monel
Equipment Details

Galvanized rigid steel conduit

  • Stainless steel airlines
  • Integrated control and instrument panel
  • TEFC motors


MECO Vapor Compressor

  • Manufactured by MECO
  • Immediate spare parts availability
  • Exchange program
  • Inconel impeller and Monel-process contact components
  • New Lube Lock Sealing System
  • Directly mounted with no vapor ductwork
  • Space friendly
  • Smaller footprint
  • Easy access for maintenance

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