Mixed-bed filters are used to fine polish demineralized water
A mixed-bed filter fine polishes demineralized water from, for example, an EDI installation. In this way we can ensure that the final minerals and salts are removed from the water.
The filter contains a mixture of two resins that act as cation and anion exchangers attracting positive and negative ions, respectively. Basically, a mixed-bed filter is not regenerable, so renewal of the resin is either by replacing the resin alone or by replacing the complete filter typically in connection with a planned service review.