Demineralization (DM) Plants

DM Plants

DM Plants

DM Plant

Demineralization or Deionization is a process of removing mineral salts from water by using the ion exchange method. In case of most natural water sources, it is possible to use Demineralization and produce water of a higher quality than conventional distillation.

These plants are used in the hospitals and laboratories as well as in production of process water, apart from water for steam boilers and high-pressure hot water boilers, and cooling water in various industries.

As the plants of this type produce demineralized water by means of ion exchange technology, a typical Demineralization (DM) Plant offered by WATERTEC consists of two MS rubber-lined pressure vessels connected in series along with its internal fittings. These DM plants are loaded with very efficient CATION and ANION exchangers and are also equipped with degasification system to remove all traces of minerals from the system. The first unit consists of high capacity strongly acidic cation exchange resin, which converts positive ions of salt and replaces them with hydrogen ions to form respective acids, which are absorbed in next vessel by strongly basic anion exchange resin. The water obtained by this process shows conductivity less than 20 µS/cm at 25°C and total dissolved solids less than 10 ppm.

In 2-Bed DM Plants, strong acid cation exchanger and strong base anion exchanger resin are used for reducing Total Dissolved Solids (TDS) up to 2-5 ppm. Degasification unit is provided to decrease the load on ANION unit. Mixed Bed Units are used in series with 2-Bed DM Plant as a polisher unit which can produce treated water having conductivity 1 mS/cm.

Further high purity water can be achieved by mixed bed deionizers, which are designed to produce high purity treated water. They can be used as polishing units after 2-bed DM Plant to obtain high purity water.


WATERTEC DM Plants have a packaged modular design which is the reason of their competitive prices. WATERTEC's standard range of products covers most process requirements. These plants have a simple structure, are easy to operate, and their design is compact and corrosion-resistant. The frame-mounted plants are quick to install and easy to maintain.

Plant Description

Flow rates for standard modules are: up to 50 m3/h. DM Plants are produced as automatic, 2-tank plants (co-currently and counter currently regenerated) and mixed-bed plants in which regeneration takes place on-site or on the basis of service. Mixed-bed is frequently used where stringent requirements for low contents of salt and silica apply.

Features & Benefits

  • Compact up flow design
  • Complete assembly with backwash and regeneration equipment
  • Counter-current design for better efficiency and lower operating cost
  • Easy to install and operate
  • Efficient design to suit varied requirements
  • Flexible layout to suit 'site' conditions
  • Free from rust
  • Low initial cost
  • Low maintenance
  • Simpler distribution and collection systems
  • Suitable for less TDS water
  • Uses less energy
  • User friendly
  • Wide range : 500 LPH - 100m3/hr


  • High-Purity Water for Pharmaceutical Applications
  • High-Purity and Silica Removal for Power Plants
  • Automobile
  • Battery Water
  • Beverages
  • Boilers Feed Water
  • Chemical Industries
  • Distilled water
  • Electro Plating
  • Electronics
  • Fabric Industries
  • Fertilizer
  • Food Processing
  • Hospital
  • Induction Furnace
  • Laboratories
  • Oil & Gas Industries
  • Steel Plants
  • Textiles

Customized Solution

Selection of a plant depends on application, water quality and water consumption. Our water experts are at your service to ensure the best customized solution.