12
NOWPAK LINER-BASED CANISTER SYSTEM
User Manual | Entegris, Inc.
Liner removal
tool
Figure 16. Removing the used liner.
NOTE: If the reusable diptube is inside the liner, cut the
liner and remove the diptube. The diptube can now be
inspected and cleaned for reuse, see Diptube Maintenance
on page 21.
7. Inspect the canister carefully before reusing it,
following your internal procedures. It is the
chemical supplier’s responsibility to ensure that
the canister is not damaged and is suitable for
use before filling with chemical.
NOTE: Cleaning the canister interior is not required
unless the liner integrity has been compromised.
Entegris does not prescribe cleaning procedures for
reusable components, and cleaning procedures depend
on the specific chemical properties of the chemical in
question. However, deionized water/isopropyl alcohol
mixtures are commonly used for cleaning, which is
generally followed by a deionized water rinse.
INSERTING TWO-DIMENSIONAL REPLACEMENT LINERS
INTO THE CANISTER
Use this procedure to insert a replacement liner into
a canister before inflating and filling with chemical.
Tools required, (see Required Tools on page 28):
Liner insertion tool, part number NA-60
(4- to 40-liter canisters); part number NA-60-200
(for 200-liter canisters).
Items needed: New pre folded liner with included
retainer (for all liners) and fitment adapter
(for 200-liter only).
IMPORTANT: Each liner is pre folded to ensure proper
inflation when an automatic or manual inflation fixture is
used. The folds are designed to open in a determined order,
allowing the liner to conform to the interior of the canister
and attain maximum volume. Do not unfold the liner before
inserting it into the canister.
1. Select a new, properly sized, pre folded liner.
NOTE: See Appendix B: Canister Compatibility Matrix,
page 32, to find the liners that may be used with each
canister.
2. Place the correct liner insertion tool into the
canister neck, Figure 17. The liner insertion tool is
used to prevent damage to the replacement liner
as it is inserted into the canister through the neck
opening. This insertion tool protects the liner from
any burrs or defects inside the canister neck.
Liner insertion
tool
Figure 17. Liner insertion tool inserted in canister neck (NA-60 shown).
3. Remove the new liner from the cleanroom packaging.
Do not unfold the liner.
The folds in the liner are
specifically designed to enable proper inflation of
the liner. The folds create a small amount of back
pressure which allows the bag to form to the upper
and lower portions of the canister equally.
For 40-liter and 200-liter liners the bottom of the
liner is folded up. Remove this fold prior to inserting
into canister. Be careful to prevent damaging the
liner while handling it.
4. Insert the liner into the canister until about 1/3 of the
liner remains outside the canister, Figure 18.
Figure 18. Liner being inserted into canister (observe liner folds).
