World leaders in dehumidification.
Dehumidifiers –
From portable devices
to industrial systems
Seibu Giken DST AB
was established 1985,
SEIBU GIKEN DST in Sweden
- DRY AIR SPECIALISTS
Moisture is found everywhere. Air moisture is usually referred to as relative humidity (RH). The
”relative” in relative humidity expresses the relation between the amount of water vapour present
and the amount that is physically possible at that temperature. In other words, relative humidity
expressed as a percentage, is the ratio of the actual partial pressure exerted by water vapour in air
to the maximum partial pressure that would be exerted by the water vapour if that air were satura-
ted, at that temperature.
Seibu Giken DST are experts in the field and provide dehumidifiers for all applications. DST dehumidifiers are characterised
by their high reliability, low power consumption and service-friendly design. With our help problems that moisture can
cause will be avoided.
SILICA GEL ROTOR - THE HEART OF A DST DEHUMIDIFIER
At the heart of every DST dehumidifier there is a D-MAX rotor from Seibu Giken Co.
Japan. The first in the world to manufacture silica gel rotors, they remain the world
leaders in this technology. The rotor is the most important single component in a
desiccant dehumidifier. It is the rotor that determines the capacity, efficiency and
lifetime of the dehumidification equipment. After 10 years of operation, the D-MAX
rotor still retains more than 90% of its original capacity.
Section of a D-MAX rotor
from Seibu Giken Co. Due
to the number of flutes
in the rotor it adsorbs
moisture with high
efficiency.
MOISTURE RELATED PROBLEMS
- AND HOW DEHUMIDIFICATION PREVENTS THEM
Condensation Mould
No condensation droplets and subsequent problems with Mould and fungus formation is prevented if the
wet products, short circuits in control devices, repainting surrounding air is kept below 70%RH.
and puddles on the floor.
Corrosion Bacteria
Extend the lifetime of tools, machines and steel structures If the relative humidity is kept below 50%RH bacteria will
by protecting untreated steel against corrosion without not thrive.
painting or greasing.
Frost and ice fouling Product sticking
No ice fouling on products, floors and ceilings. Also, Moisture sensitive products do not stick together and
extended times between defrosting and thereby increased problems with clogged pneumatic transport and lump
operating time of freezers. formation in silos are removed.
SORPTION DEHUMIDIFICATION
- HOW DOES IT WORK?
In sorption dehumidification, the basic
principle is that a rotating rotor in the
dehumidifier continuously adsorbs moisture
from the process air. Then through a
regeneration cycle the moisture is driven out
of the rotor and exhausted in different ways,
the principle pictures are demonstrating how.
Incoming moist air The Consorb principle is best Recusorb DR has an internal
used at lower regeneration heat recovery with one fan that
temperatures, typically where produces both the dry airflow
Outgoing dry air
waste heat is available or where and the wet airflow. Used for
the air inlet moisture content introducing dry fresh air into a
Outgoing wet air, either passed or is very high. The Consorb prin- process or to an ‘open’ or ‘total
condensed out ciple is also used in balanced loss’ system where the dehu-
‘closed’ type systems where the midified air is ducted into the
dry process air is recirculated. object. Can be used on both
‘open’ and ‘closed’ type systems.
Aquasorb basically functions as a Consorb but moisture Recusorb R has an internal heat recovery to improve
in the wet air is condensed through an air cooled conden- operating efficiency. Heat transferred to the rotor during
ser. One centrifugal fan is used for both the dry air and the regeneration is effectively recovered by the incoming rege-
condenser cooling air, so all energy released during the neration air, thus reducing the amount of energy required
process accumulates in the room. Commonly used where it by the regeneration heater. The process air outlet is both
is impractical to use ducting for the reactivation air system. cooler and drier when compared to other desiccant dryers.
Econosorb combines a heat pump with the sorption Frigosorb is used in applications where it is difficult to
rotor in a unique way, providing very low energy consump- remove a wet air flow. Thanks to the heat pump function
tion with a low dry air temperature. It’s probably the most Frigosorb is very energy efficient, using approximately
energy efficient dehumidifier on the market, with approx- 33% of the total energy consumption of regular sorption
imately 25% of the total energy consumption of regular dehumidifiers.
sorption dehumidifiers. Econosorb has both condensation
and wet air flow.
DST DEHUMIDIFIERS
Consorb CS Consorb Recusorb DR Consorb Aquasorb Recusorb DR
CS-5/5L DC-5 DR-010B DC-10 AQ-30B/31B/31L DR-20B/20D
0.35 0.4 0.5 0.5 0.6 0.85 1.15 1.55 0.8 1.0
65 90 120 190 190 330 330 370 330 360
Consorb Recusorb DR Recusorb DR Recusorb R Recusorb DR Consorb
DC-20/30 T10, T16 DR-31 T10 DR-40, T10, T16 DC-31 T10, T16 DR-50R DC-50R
1.1 1.3 1.5 1.6 1.6 2.3 1.4 2.1 2.8 3.0
310 400 400 310 600 550 300 490 600 550
Recusorb R Recusorb R Recusorb R Recusorb R Consorb
RL-60/60LR R-51R/61R RL-61/61L RL-71/71LR RLZ-81/82101/102/102L/104 CZ-82/102/102L/104
4 5 7.3 10 7.5 8 11 11.5 13 14 17 19 20 25 27 22 23 36 39
850 1000 1250 1450 1300 1600 1800 2100 2500 30.5 49.5 57 70 50 55 65 69
3000 3200 2900 3500 4500 4600 6000 3200 5200 7200 8000
7000 9000 10000 10500 12000 10000 12000
Consorb, Econosorb,
Frigosob, Recusorb
Flexisorb Capacity kg/h
(20˚C/60%RH)
Airflow m³/h
LARGER
DEHUMIDIFIERS FOR INDUSTRIAL
APPLICATIONS
The Flexisorb dehumidifier system can be
tailored to suit individual requirements.
Everything from basic desiccant dehumi-
dification to a complete climatic control
system is offered. With total flexibility in
design, these highly efficient industrial
atmospheric air dryers are structured
around the rotor to conform precisely to
customers’ specifications. Dehumidifica-
tion is the prime objective of Flexisorb,
and whilst pre-cooling is often required,
post cooling and post heating can also be
included. The Flexisorb system offers one
of the most versatile air drying systems
available today.
Rotor
Heater
Cooler
Filter
Fan
Example of configuration for a Flexisorb
A FLEXISORB’S QUALITIES
All Flexisorb dehumidifiers are designed to be energy-efficient
and environmentally friendly. Regeneration heaters are available
for use with natural gas, LPG, steam, hot water and electric - or
a combination of two. Flexisorb units are constructed with an In the Flexisorb
anodized aluminium frame and a smooth interior that makes dehumidifiers the Consorb,
it easy to wash to maintain good hygiene levels. Stainless steel
panels are available as options for dehumidification in demanding
Econosorb, Frigosorb or
environments. Recusorb principles can be
used.
HUMIDITY AND TEMPERATURE
CONTROL
Humidistat and Humidistat EH4
controller EH3 T2
PLC C4 with 5.7” graphic touch display.
Advanced PLC control with large expansion options
DST can deliver dehumidifiers with complete control systems for both humidity and temperature control. By having
integrated control of the output temperature, the total energy consumption is reduced in the air handling process. This is
due in part to the optimized controls that regulate the dehumidification process and temperature requirements and in part
by setting the right configuration and using fresh air and exhaust air to suit each case. PLC C4 is used for advanced control
of our larger dehumidifiers. The features are tailored to fit the customers’ requirements and can be set to communicate with
higher-level systems with Modbus. There is also an option to mirror the PLC’s control panel to an external computer via the
supplied software. This makes it easy to set the controller values and load operational data remotely and therefore provides
a cost-effective control of the process.
Additional control options for all DST dehumidifiers are the EH3 and EH4 controllers. The EH3-T2 humidity controller can
control linearly or on/off with the parameters relative humidity, absolute humidity, dew point and temperature, as well as
optional communication to a superior system via Modbus. It can also be programmed to keep a surface condensation free
with the addition of our surface temperature sensor. For a simple control experience, the EH4 humidistat controller can
control the dehumidifier via an RH set-point in one or two steps making this an ideal humidistat for dehumidification only
applications.
COMMUNICATION AND MONITORING
3G
4G
TCP/IP
RTU
Seibu Giken DST AB has representatives
in more than 40 countries worldwide.
Seibu Giken DST AB
Avestagatan 33 | SE - 163 53 Spånga, Sweden
Phone: +46 8 445 77 20 | Fax: +46 8 445 77 39
info@dst-sg.com | www.dst-sg.com
CERTIFIED
ISO 9001
Quality management systems
Seibu Giken DST ist certified
according to ISO 9001
Updated 18.12
