Altec AIR CO2-PG14 CO2-Free Gas Generator Operations and Maintenance Manual
Page 2
P012548-14 - Rev D
MONTH/YEAR OF MANUFACTURE
SERIAL #
SECTION 1 GENERAL
INFORMATION
1.1
SERIAL NUMBER CODING
1.2
DESCRIPTION OF OPERATION
The CO2-PG14 CO2-Free Gas Generator consists of three
main components: a high-efficiency coalescing inlet filter, a
CO
2
adsorber/dryer, and an outlet filter/regulator.
The coalescing inlet filter removes entrained particulate and oil
contaminants prior to the adsorber/dryer.
The CO
2
adsorber/dryer uses the pressure swing adsorption
(PSA) method of CO
2
removal and drying compressed air.
This requires two identical towers containing beds of 13X
molecular sieve beaded media.
Incoming compressed air enters the adsorber/dryer through the
four-way solenoid valve, where it is directed to the bottom of
the tower containing active 13X media (T1) as shown in Fig 1
to the right. The media in this tower removes CO
2
to less than
1 ppm and 99.9+% of the water vapor from the air when
operated at standard catalog conditions. The dry, CO
2
-free air
leaving the top of the tower (T1) is directed to the outlet
through a shuttle valve. The purge orifice allows a portion of
the dry, CO
2
-free air to flow into the other tower (T2) being
regenerated. This cleaned purge air regenerates the desiccant
by removing the accumulated CO
2
and water vapor and
carrying it out the open purge port.
The 4-way solenoid valve is controlled by a solid-state timer.
After 30 seconds, the desiccant in tower T2 is regenerated, and
the timer de-energizes the solenoid valve causing the process
to reverse instantly, with tower T2 adsorbing and tower T1
regenerating. The following flow schematic demonstrates the
adsorber/dryer operation.
( Fig 1 )
CO2-PG14 4-WAY VALVE TIMING CYCLE
30 seconds energized
30 seconds de-energized
1 minute total cycle time
4-way
solenoid valve
purge port
contaminated
inlet air
tower T1
adsorbing/drying
inlet air
tower T2
regenerating
purge orifice
shuttle valve
shuttle ball
CO
2
-free/dry air outlet
