Design - Labotek Desiccant Flex Dryer Manual

Rev. 01

2.3 Design

2.3.1 DFD (Desiccant Flex Dryer)
Pos. Item
(1) Desiccant bed assembly
(4) Heating elements for regeneration
(5) Valve unit for desiccant beds (upper)
(6) Valve unit for desiccant beds (lower)
(8) Return air cartridge filter
(11) Fresh air filter
(16) Return air pipe
(17) Return air pipe
(18) Control cabinet
(19) Microprocessor control (control panel)
(20) Power switch
R2647
The Desiccant Flex Dryer (DFD) operates in a closed system and is fitted with two desiccant beds
to dehumidify the air before use. One of the desiccant beds will always be operative in the drying
cycle while the other bed will be regenerating or in stand-by mode ready for activation into the
drying cycle.
The DFD dryer operates on the adsorption drying principle, i.e. the water molecules pass a water
adsorbent agent (the desiccant) which adsorbs the water molecules and releases them again during
regeneration. The desiccant used in the DFD dryer is called a molecular sieve.
It has a large surface to which the water molecules can affix. The water is removed from the
desiccant by heating (regeneration).
Desiccant Flex Dryer DFD Side 3 af 40