SECTION 1 GENERAL
INFORMATION
1.1
MODEL DESCRIPTION
The CO2-PG80 Purge Gas Generator is designed to remove
water and CO
2
from a compressed air stream. This is done by
passing the air through beds of adsorbent media (using 13X
molecular sieve) which adsorbs both H
2
O and CO
2
.
1.2
SERIAL NUMBER CODING
1.3
DESCRIPTION OF OPERATION
The CO2-PG80 Purge Gas Generator uses the pressure swing
adsorption method of gas separation. This requires two
identical towers containing beds of adsorbent desiccant media.
Incoming wet, CO
2
rich air enters the adsorber/dryer through
the inlet port, where energized SOLENOID VALVE A directs
the pressurized air stream to the bottom of DESICCANT
TOWER A containing active adsorbent. This adsorbent media
bed removes water vapor and CO
2
gas from the air to better
than -100°F dew point and less than 1 PPM CO
2
when
operated at catalog conditions. The dry and CO
2
free air
leaving the top of DESICCANT TOWER A is directed to the
outlet through open CHECK VALVE A. PURGE ORIFICE B
and closed CHECK VALVE B allow a metered portion of the
processed air to flow into DESICCANT TOWER B being
regenerated. The open purge port on deenergized SOLENOID
VALVE B and the purge orifice reduce the pressurized dry air
down close to atmospheric pressure and regenerate the
adsorbent media by removing the accumulated water vapor
and CO
2
and carrying it out the open purge port.
The two solenoid valves are controlled by a solid state timer.
After 30 seconds, the media in DESICCANT TOWER B is
regenerated, and the solid state cycle timer causes the process
to instantly reverse, with TOWER B adsorbing and TOWER A
regenerating.
The
following
flow
schematic
(FIG
1)
demonstrates the adsorber/dryer operation.
FIG 1
SOLENOID VALVE TIMING CYCLE
30 seconds per side continuous
1 minute total cycle time
P/N P013253 REV B
MONTH/YEAR OF MANUFACTURE
SERIAL #
