NOWPAK LINER-BASED CANISTER SYSTEM
17
User Manual | Entegris, Inc.
5. (200-liter canister only.) Place a fitment adapter into
the 2 inch liner fitment, Figure 29.
6. Connect the manual inflation fixture to a canister
with a properly inserted liner by threading clockwise
until firm resistance is felt.
Figure 29. Fitment adapter.
7. Open the three-way valve to begin the flow of
nitrogen into the liner.
8. Monitor the pressure reading on the regulator to
verify that the pressure drops below 62 kPa (9 psig).
If the pressure does not drop below 62 kPa (9 psig),
the inflation process should be stopped, and the
regulator setting should be reduced prior to
inflating liners.
9. Close the three-way valve when the pressure rises
back up to 62 kPa (9 psig) on the pressure regulator.
This stops the inflation with an internal pressure of
62 kPa (9 psig).
10. Allow the system to stabilize for 20 seconds. During
this time the regulator pressure will move up to the
original set point. This time is required to allow the
liner to properly form to the interior of the canister.
11. Release pressure to the canister by switching the
three-way valve to the vent position.
12. Remove the manual inflation fixture from the canister
and remove the fitment adapter (200-liter only).
Inspect the canister interior for visible obstructions
through the fill opening. If no obstructions are noted,
remove the fitment adapter (when used) and replace
the red temporary cap on the fitment or seal with a
suitable closure.
13. The canister is now ready to be filled with chemical.
If an obstruction is noted, the liner may be re-inflated
a second time as described above. If obstructions
persist, the liner should be removed and replaced.
NOTE: Removing a previously inflated liner from the
canister may damage the liner and may compromise
its performance.
NOTE: If the canister is not going to be filled
immediately, secure the red temporary cap to
the canister to prevent contamination.
If the liner does not inflate properly, check the
following troubleshooting tips:
SYMPTOM
CAUSE
CORRECTIVE
ACTION
No flow or
restricted flow
of nitrogen
or CDA
Regulator
improperly
installed or
damaged
Verify regulator
and filter
plumbing.
Total inflation
time is too long
Nitrogen
pressure
too low
Check the
inlet regulator
pressure setting.
Make sure the
tubing is large
enough and is
not too long.
CANISTER FILLING AND DIPTUBE INSERTION
Chemical suppliers use this procedure to fill a canister
with the desired chemical, after the liner has been
inserted and inflated.
1. Remove the red temporary cap or closure assembly
from the canister, if present.
2. Fill the liner with the desired chemical in accordance
with internal operating procedures and regulations.
See Appendix B: Canister Compatibility Matrix, page
32, for fill capacity information.
NOTE: Do not attempt to fill chemical through the
diptube. Insert the diptube after filling the canister, as
described below.
3. (200-liter canister only) Upon completion of
chemical filling, remove the red protective cap
from the proper fitment adapter. Insert the adapter
into the fitment and press firmly to ensure the
adapter is fully seated in the fitment. The fitment
adapter, Figure 29, is used on all 200-liter canisters
to reduce the fitment opening to the size required
for diptube insertion.
