For industries: Marine Offshore This section is only for development help

HEM Series 25 Reverse osmosis desalinator, 3,400 to 6,000 litres/day

The HEM Series 25 system is designed for medium sized yachts where a heavy duty unit is required, but one which is compact. Over the years, these units have supplied millions of tons of water for yachts all over the world.

The system is available in modular or frame configurations to suit the available space.

The slow running HP pump (700 rpm) is driven by a large 2.2 kW motor, making the system larger and heavier than the lightweight 20 Series.


  • Available in frame or modular form.
  • Brine and product water flow meters.
  • Automatic shutdown by system under/over pressure.
  • Controls include hour meter, thermal protection for LP/HP pumps, remote alarm connections, digital permeate quality indicator.
  • Automatic salinity control and ‘dump’ feature.
  • Optional extras: prefilter system, sandfilter, semi-automatic flushing, UV steriliser.

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ModelWeight (kg)Litres/dayLitres/hour
HEM 25/9001103400140
HEM 25/13001154800200
HEM 25/16001206000250