Desiccant dehumidification

Seibu Giken DST one of the world's top suppliers of sorption dehumidifiers. DST is currently represented in more than 30 countries all over the world. Our range of products is aimed at the water damage restoration industry and the process industry, and created for applications such as warehouses, skating rinks and power stations. DST was founded in 1985 and became a subsidiary of Seibu Giken Japan in 1993.

The business idea of Seibu Giken DST
“ We shall satisfy the customers need to protect material against damages caused by humidity”

Why dehumidification?

  • Corrosion
    Iron and steel will not rust if the air in contact with the surface has a humidity below 50% relative humidity (RH)
  • Condensation
    Moisture will not condensate on a surface if the air in contact with it has a dew-point lower than the surface temperature
  • Ice formation
    Ice will not form on a surface if the air in contact with it has a dew-point lower than the surface temperature
  • Handling of hygroscope materials
    The quality of dry drugs, dry food, hard candy and other hygroscope materials can only be maintained through production to the consumer if it is kept in contact with air at a low relative humidity
  • Drying buildings
    When drying moisture from a building, whether it is a new building or a building with water damages, the most effective way is to use sorption dehumidifying
  • Mould
    Mould and fungus formation is prevented if the surrounding air is kept below 70%RH. This is important in many situations, for example in storage of wooden products
  • Product drying and cooling
    When drying and cooling products a low relative humidity is essential for a fast process. If the products to be dried are sensitive to high temperature, the low relative humidity can only be obtained with dehumidification
  • Bacteria
    Bacteria need humidity to survive and multiply. Often the humidity required for bacteria to multiply is found on hygroscope materials
  • Odours
    Unpleasant odours, will drastically be reduced if the relative humidity is kept below 50%RH. For example in sewage stations the odours can be controlled by installing a dehumidifier.


  • Pharmaceuticals
    Dry air is most important during the production as well as during the storage of pharmaceutical products.
  • Food and confectionery
  • Dry air storage
    Dry air storage is used for a variety of materials, such as corn, coffee, powders, sugars and electronic equipment. As the name indicates, dry air is essential for maintained quality. Using air is far more economical than heating and ventilating large storage areas.
  • Dehumidification of indoor ice-rinks
  • Dehumidification of storage tents
  • Power stations

Machinery installed in power plants require protection against moisture. Evaporation occurs from water surface and pipes containing water resulting in high humidity conditions within the normally well insulated buildings. Condensation will occur whenever the warm air comes into contact with the surfaces of pumps and pipes containing cold water.

  • Waste water purification plants/pump stations
  • Defence

Military storage
Since the 1970's, desiccant equipment has been used by the military all over the world for preservation by dehumidification. Inactive ships, tanks, aircraft, weapons and supplies are kept in dry air storage, provided by dehumidifiers. The technology enables an increased combat readiness and decreases the preservation costs drastically.


Example of dehumidifiers from Seibu Giken DST AB:

CF-152 of the Flexisorb series Industrial sized dehumidifier. This unit was delivered to Saudi Arabia.


All DST dehumidifiers contain the SSCR-rotor from Seibu Giken, a guarantee for high quality.

Small dehumidifiers


Stainless steel units. These dehumidifiers are used for purposes such as dehumidification in military warehouses, hydropower plants and for permanent installations in areas with relatively low moisture levels.

DR -40 and DR-50 are easy to maintain. The components are easy to disassemble.
DR-40 and DR-50 are suitable for several applications, for example cold and dry air storages and cargo protection. The DR-40 can be delivered with a 10A or 16A fuse.

Medium-sized dehumidifiers
The R-060BR and R-061R are stainless steel units used in fields such as process industry, warehouses, plastic halls or in the event of serious water damage.

The R-series
For larger applications. Double skin insulation and built-in fans. It has been widely used in for example pharmaceutical applications and confectionery production.

The RZ-range
The RZ-range consists of three compact units made of galvanized steel with fans on the outside. Ideal for the process industry, for example.

Flexisorb -dehumidifiers for industrial applications
Flexisorb mean flexibility. The Flexisorb range has been developed by DST to satisfy the varying requirements of the industry. Flexisorb units are modular in their design, and have tremendous potential to be adapted according to the specific requirements of each application. Contact your nearest agent for more information.
Flexisorb uses the Recusorb, Consorb, Econosorb or Flexisorb dehumidification principle.

Aquasorb A-30B
Aquasorb is a sorption dehumidifier that condenses out the moisture. The chassis is made of stainless steel, which is especially important in condensing units. The rotor is, as always, washable, all energy is accumulated in the dry air. Aquasorb operates at dew-points
below 0C.

Rotor Cassettes
Rotor cassettes are used when a standard dehumidifier is not suitable or does not satisfy the customers' needs, e.g. air treatment units.

The rotor cassettes contains:
- Seibu Giken's unique SSCR rotor
- Rotor motor with transmission
- Sector seals

Technical Data Downloads