Available options
20
HDK350_EN_01_2005-05-10
Pressure build-up phase
After dehumidification the pressure in the regenerated hollow section vessel is
built up to operating pressure, so that the switchover from regeneration to
adsorption can take place at operating pressure level.
Standby phase (only with the
dewpoint-sensing control
option)
When in standby phase, the fully regenerated vessel is ready for absorption
operation. The system is switched to this vessel, as soon as the measured
dewpoint at the compressed air outlet has reached the set dewpoint value for
switchover.
Switchover
When the drying agent in the adsorbing vessel has taken up a sufficient level of
humidity, then the switchover between the vessels will be effected between the
vessels. Following switchover, the above-described process is repeated, with the
adsorption and regeneration now taking place in the respective different vessel.
Available options
The following options are available for the dryer:
Start-up device
Outside installation
Auxiliary heater
Signalling contacts of control system
Regeneration gas return line for compressor synchronisation
Dewpoint-sensing control
Pneumatic control
Paint compatible design
Start-up device
A start-up device basically consists of a pressure holding device, which is located
at the rear of the dryer. The pressure holding device ensures that pressure can
build up in the dryer and adsorption take place.
It is always required when an empty compressed air reservoir or an empty
compressed air system must be filled downstream of the dryer (e.g. following
weekend shutdowns and when the pressure in the compressed air system can
frequently drop below the stated operating pressure).
The start-up device cannot be combined with the regeneration gas return line
option.
Outside installation
As standard, the dryer is not suitable for outside installation, as its function and
service life is influenced by the following factors:
Environmental humidity due to rain (or other deposit)
Corrosion caused by environmental humidity or a salt-containing environment
Summary of Contents for HDK 50/100
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