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GrainPro® Cocoon Indoor™ Instruction Manual
MA4044RAD1114-7
b) Flushing (emptying of the cylinder) depends on the amount of CO
2
to be applied. Emptying
one 22kg cylinder should only take about 20 to 30 minutes. If the pressure hose or the inlet
valve gets blocked with ice, this is an indication that the CO
2
is being released too quickly. If
this happens the cylinder should be closed until the ice melts, and then the cylinder tap should
be re-opened and adjusted to reduce the flow.
c) An additional indication that the gas is being released too quickly is when the Cocoon Indoor
begins to balloon out because pressure begins to build-up inside. If this happens, the gas flow
should be decreased at the cylinder tap until the rate of air being expelled through an open
zipper section is about the same as the rate of CO
2
entering the liner.
d) If necessary, for small scale applications and the cylinder is not inverted, weighing scales may
be used to control the weight of the gas delivered. In this case the gas is released slowly
through a pressure gauge which can be adjusted to control the flow-rate.
5.5.4. Since CO
2
is heavier than air, the air in the Cocoon Indoor will be displaced upwards and will be
lifted out of the container through an open section of the zipper. Complete displacement is not
possible as there is always some mixing at the interface between the air and the CO
2
. However,
if the final CO
2
concentration reaches 80% then the O
2
concentration in the remaining air
amounts to 4% leaving 16% nitrogen. This mixing of the CO
2
with the remaining air, and
absorption of CO
2
by the commodity, will take 12-24 hours depending on temperature. This will
also be the time to determine the initial concentration of CO
2
.
5.5.5. After the required weight of CO
2
has been
flushed, immediately:
a) Close the CO
2
cylinder valve.
b) Close
the
open
zipper
section
thoroughlyusing the slider when air has
been displaced.
