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SelRO nanofiltration elements provide excellent chemical and thermal stability. Most nanofiltration membranes previously available were limited to aqueous applications within a pH range of 2 to 11, insufficient for certain pharmaceutical applications with aggressive cleaning requirements. These acid/base stable membranes can be operated within a pH range of 0 to 14.

The SelRO solvent stable nanofiltration membranes enable the concentration of pharmaceutical intermediates in aqueous solutions which may also contain methanol, ethanol, acetone, acetonitrile, and other organic solvents. Solvent stable membrane modules are available in a spiral configuration in a wide variety of pilot and large scale commercial sizes.
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