Decker Verfahrenstechnik GmbH

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Demineralisation cartridges, DM-Cartridges (DMC)


Company profile


Ion exchange system external regeneration

Type KR (recirculation systems)

Type SE (selective)

Ion exchange system

Type KR (recirculation systems)

Type SE (selective)

Type SE with recycling

Filter units

multi-layer filter FNS

High performance filter DF1

Demineralisation systems

 Demineralisation cartridges

Reverse osmosis units

Demineralisation plants

Ion exchange resin
Waste-water treatment
Synthetic material
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Decker Demineralisation cartridge = DM-Cartridges (DMC)

The Demineralisation cartridge produces demineralised water of highest quality. Trouble-free operation is guaranteed by the Decker regeneration service for exhausted demineralisation cartridges.

  • easy to use

  • space saving

  • no chemicals needed

  • regeneration of exhausted cartridges at the Decker regeneration plant

Decker Vollentsalzungspatrone
Figure: Demineralisation cartridge (DM-Cartridge)

Examples of use

Mixed-bed ion exchanges with regeneration service are ideal for the production of demineralised water with a requirement of up to 2m per week (e.g. for the new preparation of electrolutes in the electroplating).
For higher amounts of demineralised water we recommend reverse osmosis systems.

For the purification after reverse osmosis systems

Reverse osmosis systems remove up to 97% of dissolved salts, i.e. with a conductivity of f. ex. 400 S/cm of the inflowing water a demineralisation up to 12 S/cm will be achieved. With a mixed-bed exchange installed downstream a demineralised water with a conductivity < 1S/cm can be generated with long operation time of the mixed bed resins.

For the recirculation of pure water, as final rinsing to achieve stain-free drying of the product surface

By combining activated carbon, cation exchange and anion exchange and downstream mixed-bed exchanges pure water of high quality can be produced (conductivity < 0,1 S/cm). Recirculation of final rinses is possible at temperatures up to 70C. The recirculation of the hot rinse at the end of the rinsing sequence has proven of value especially for manufacturers of sanitary fittings.

Recirculation of demineralised water used in electrical discharge machining (EDM)

EDM processes require demineralised water which has to be constantly replaced. The exhausted mixed bed resins can be recycled with a service-regeneration. Single-use resins will be disposed as hazardous waste.

Regeneration/External regeneration

The exhausted mixed bed cartridge resp. the resin filled in a transport container will be delivered to Decker Verfahrenstechnik. A pick-up service is also possible. In the central regeneration plant cation and anion resins will be separated and regenerated with hydrochloric acid or sodium hydroxide. After proper rinsing the resins will be mixed again.

Regenerated resins will be returned to the customer either in mixed-bed cartridges ready-to-use or in transport containers which are to be filled by the customer.

Additionally to the regeneration service for mixed bed resins of fresh water demineralisation units we have special offers for metal loaded mixed bed resins of recirculation systems in electro-plating or EDM plants.

Usually mixed bed cartridges are sold as 30 l- resin cartridges but are also available in each size from 5-500 litres according to customers specifications.

Figure: Demineralisation cartridge (DM-Cartridge) engineering drawing


Technical Data

Cartridge material: GFK-vinyl-ester
Dimensions: diameter: 229 mm, height: 1,100 mm
Connections: inflow and drain d25
Pressure: max. 6 bar
Flow rate
Cartridge weight
Resin: 30 l mixed-bed resin

With a filling of 30 litres resin the demineralisation capacity for a tap water (15dH) is:

1 S/cm 1860 L
5 S/cm 2160 L
10 S/cm 2280 L

For full utilization of the capacity we recommend to use 2 cartridges in series connection.


Decker Verfahrenstechnik GmbH
Bruckaecker 12, 92348 Berg/Opf., Germany
Web: E-Mail:
Phone: +49 (0)9189/4410-0 Fax: +49 (0)9189/4410-20

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