Deminer­al­i­sa­tion

BWT ion exchange

Deminer­alised, for water without salts, low conduc­tivity and specialist appli­ca­tions
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Demineralistaion Demineralistaion

The labo­ra­tory experts

Opti­mised water

Deminer­al­i­sa­tion process which removes inor­ganic salts from water

Deminer­al­i­sa­tion is a process by which inor­ganic salts, often referred to as Total Dissolved Solids (TDS), are removed from source water using a similar ion exchange process to the one found in water soft­eners. Total deminer­al­i­sa­tion of water can be obtained by mixing several types of ion exchange resin together - hence the name mixed bed. The vessel contains cation resin, which is strongly acidic, and anion resin, which is strongly alka­line.

When the water passes through the resin bed, the content of cation and anion in the water are exchanged for H+ and OH- respec­tively, which combined gives the result H20. Deminer­alised water contains hardly any cations and anions, there­fore, the conduc­tivity is very low, < 0.2 µS/cm. The content of silicic acid and free carbon dioxide are also signif­i­cantly reduced, meaning minimal corro­sion and scale deposits.

Typical Appli­ca­tions

  • Resi­den­tial homes
  • Hotels & restau­rants
  • Schools, colleges and univer­si­ties
  • Sports centres & leisure facil­i­ties
  • Labo­ra­to­ries
  • Dentistry
  • Printing

Markets

  • Resi­den­tial homes
  • Hotels & restau­rants
  • Schools, colleges and univer­si­ties
  • Sports centres & leisure facil­i­ties
  • Labo­ra­to­ries
  • Dentistry
  • Printing

Opti­mised Water

Patented tech­nology for specialist water treat­ment appli­ca­tions world­wide

Tech­nical and medical appli­ca­tions demand deminer­alised water, which can be produced simply and effi­ciently from drinking water with our BWT best­demin PLUS filter system. A mixed bed ion exchanger rids the raw water of all dissolved salts. The resulting fully desali­nated and deminer­alised water corre­sponds to DIN EN 13060 and DIN EN 285 and is suit­able for a range of uses. It can be used in labo­ra­to­ries to set up reagents profes­sion­ally or to clean devices without residue. It is essen­tial for steam gener­a­tion in ster­ilisers for medi­cine and dentistry, as it completely prevents salt deposits. This filter tech­nology can also be used to protect steam gener­a­tors in commer­cial laun­dries.

BWT best­demin PLUS is oper­ated without waste. Valves in the filter head prevent back­flow into the drinking water line or filter cartridge and prevent water from escaping. BWT best­demin PLUS food-​safe filters are pres­sure resis­tant and safe. They can be oper­ated on any drinking water system world­wide.

Demineralistaion
Demineralistaion

Best­demin

Minerals in the water are very impor­tant for many appli­ca­tions, for example prepa­ra­tion of hot drinks. In contrast, for other appli­ca­tions water needs to virtu­ally salt free in order to ensure effcient and safe oper­a­tion of specialist equip­ment, e.g. ster­il­izing ovens, evap­o­ra­tors, steam auto­claves and steam gener­a­tors. The Best­demin tech­nology offering protec­tion for very small tubes used in these prod­ucts against any salt deposits.
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Demineralistaion

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