Sea Water Reverse Osmosis (SWRO)

Sea Water Reverse Osmosis (SWRO) is a reverse osmosis desalination membrane process that has been commercially used since the early 1970s. The typical single pass SWRO system consists of the following components:

  • Intake
  • Pre-treatment
  • High-pressure pump
  • Membrane assembly
  • pH adjustment
  • Disinfection

Corodex has supplied several sea water reverse osmosis systems with feed water TDS up to 45,000 ppm. For more information on projects done under SWRO please see our projects profile.

Standard Features

  • The film composite membranes
  • Stainless steel centrifugal multi stage pumps or NAB plunger pump
  • Fiberglass membrane housing
  • Antiscalant Dosing System
  • 5 Micron presidiment multi cartridge filter
  • Inlet water shutoff valve
  • Low pressure pipes in 16 Bar PVC
  • Stainless steel valves
  • Low pressure switch
  • Liquid filled pressure gauge
  • Reject regulation valve
  • Permeate and reject float type flow meters
  • Permeate water TDS monitor
  • Permeate tank level switch 50 Hz Motors

Optional Features

  • Stainless steel centrifugal feed pump
  • Manual or automatic sand filter
  • Manual or automatic activated carbon filter
  • Iron removal filter
  • Acid dosing system with pH controller
  • Chlorination dosing system
  • Feed TDS monitor
  • Digital flow meters with totalizers
  • Clean in Place (CIP) System
  • Automatic Flushing valve
  • Automatic Permeate Flushing system
  • Permeate pH correction with pH controller
  • PLC controlled 60Hz Motors
  • 20 Micron Presediment Multi Cartridge Filter
  • Programmable sterilization system
  • Automatic blending system
  • Double pass RO units

Operating Conditions


Max pressure

82 bar

Max Temperature

45 degree C

pH range

3 – 10


45000 ppm

Min Salt Rejection

96 %

Average Salt Rejection

98 %

Feed Water Chlorine Content


Max feed Water SDI


Maxi.Feed Water Turbidity