Labconco AtmosPure Re-Gen Gas Purifiers 5121845 - Manual (Page 24)

Chapter 3: Getting Started
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Regenerating the Gas Purifier Catalysts
The AtmosPure Re-Gen Gas Purifier is initially shipped with the copper
catalyst and molecular sieve fully regenerated and ready to use. The copper
catalyst can last 1-3 months with normal use. The performance levels and
frequency of regeneration are dependent on several influencing factors
including:

Purity of inert gas being used and the amount of O
2
/H
2
O removal
by evacuation and filling during initial glove box operation with
the inert gas.

Permeation rate of the glove box rubber gloves.

Oxygen and moisture content of materials introduced into the
glove box.

Glove box liner material and its permeation rate.

Frequency of use and applications that introduce oxygen and
moisture into the inert atmosphere.
The regeneration procedure requires 13 hours and may be done overnight.
Refer to Figure 3-7 for control panel features.
WARNING: Before starting the regeneration procedure,
make sure that the Gas Purifier exhaust vent is connected,
to safely discharge vapors from the regeneration process to
the outside or to a fume hood. The exhaust vent is
attached to the flow control valve per Figure 3-1.
Regeneration Mode (isolation valves must be closed):
The regeneration process consists of a H
2
Set cycle, a Heat cycle, a H
2
Purge
cycle (using 4% hydrogen/inert gas mixture), and a Vacuum cycle that takes
13 hours and can be done overnight. Moisture is driven from the molecular
sieve by the heat. Oxygen is removed from the heated copper catalyst by the
hydrogen combining with the copper oxide, which forms H
2
O. After the heat
and purge cycles, the vacuum cycle removes the residual gas and moisture
from the purifier. The H
2
set cycle allows the operator to set the 4%
hydrogen/inert gas mixture flow rate with the flow control valve (Figures 3-1
and 3-7) as follows:
4% hydrogen/ 96% helium, 10 CFH
4% hydrogen/ 96% nitrogen, 20 CFH
4% hydrogen/ 96% argon, 25 CFH
!