PIGNAT Reverse Osmosis For Seawater – OSM4000



Reverse osmosis membrane filtration with a maximum 50 bars operational pressure

  • Desalinization process

Osmosis and reverse osmosis

Osmosis entails transferring a solvent (generally water) through a semi-permeable membrane due to the action of a difference in concentration. The transfer is complete when the two concentrations are equal and equilibrium is reached.

If a pressure is applied on the surface of the concentrated salt solution, the solvent flow reduces to zero. This pressure applied to cancel out the solvent flow is known as the osmotic pressure. If the pressure applied is greater than the osmotic pressure, the solvent flow is reversed. The phenomenon is the principle behind reverse osmosis filtration. A concentrated salt solution circulates at high pressure over the surface of a membrane. The solvent (pure water) passes through the membrane, forming the permeate; the solution is depleted in solvent and leaves the module with a higher salt concentration, resulting in the concentrate.

Study of essential parameters of the osmosis process:

  • The osmotic pressure of the water
  • The permeability of the membrane
  • The rejection and conversion rate of the reverse osmosis module

Optimization of a process of osmosis:

  • Determination of the operational conditions ideal for attaching the amount and quality of the permeate

General Specifications

  • 100 L cylindrical feed tank in PE.
  • Reverse osmosis module
    • High pressure carter.
    •  Spiral type membrane
  •  High pressure gear pump (50 bar).
  • 30 L graduate permeate tank with removable lid.
  • 60 L graduate retentate tank.
  • 2 beakers 1 L for sampling.


  •  Flowmeters
  • Manometers.
  • Level sensor.
  • Combined probes (conductivity and temperature) with electronic indication.

Dim : 210 x 70 x 180 cm – 150 kg
SS tubular framework 40 x 40mm

For a complete product data sheet and a list of reference sites please call 1-877-967-2726.