Description; Overview Of Operation; Operation - Parker CDAS HL 050 Guide D'utilisation

2 Description

2.1 Overview of Operation

Adsorption dryers operate on the principle of two drying beds, one to dry the process air whilst the other is being regenerated and readied for use,
swapping periodically. CDAS HL / OFAS HL dryers operate on the Pressure Swing Adsorption (PSA) principle which uses a proportion of the dry
process air to regenerated the off-line bed. The diagram below illustrates the drying / regeneration cycle of a CDAS HL / OFAS HL operating at
maximum (Full Flow / Minimum Inlet Pressure / Maximum Inlet Temperature)
Side A
Side B
Drying

2.1.1 Operation

CDAS HL & OFAS HL are complete purification systems designed to reduce the major contaminants found in a compressed air system.
CDAS HL provides 4 stages of contamination reduction for 7 contaminants (if liquid water or oil is present, the CDAS HL must be protected by an
optional OIL-X WS grade Water Separator).
Stages of Purification: 4
Contaminants Reduced: 7 (9 with optional Water Separator*)
Stage 1 - General Purpose
Coalescing Filter
For the reduction of water
and air aerosols down to
3
0.5mg/m (0.5ppm(w) and
particulate down to 1
micron.
Provides protection of the
High Efficiency Coalescing
Filter and Dryer.
Stage 4 - General Purpose
Dry Particulate Filter
For the reduction of
particulate down to 1
micron
* Optional Water Separator only needed if liquid oil or water is
present at the inlet to purification system (Not a requirement
for all compressed air systems).
Standard Drying and Regeneration Cycle
Depressurisation Regeneration
Stage 2 - High Efficiency
Coalescing Filter
For the reduction of water
and air aerosols down to
3
0.01mg/m (0.01ppm(w)
and particulate down to
0.01 micron.
Provides protection for the
Dryer.
Stage 3 - Adsorption Dryer
For the reduction of water
vapour.
o
Standard PDP of -40 C
o
Option for -70 C PDP or
o
-20 C PDP
Time (Seconds)
Repressurisation
CDAS Operation
Energy Saving (DDS)
3