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NOWPAK LINER-BASED CANISTER SYSTEM
User Manual | Entegris, Inc.
4. Insert a pre cleaned diptube through the center of
the fitment or adapter. Leave the diptube resting
loosely in the fitment or adapter. Do not press the
diptube down into the liner fitment. A seal of the
diptube to the fitment is not required, nor desired,
for pressure equalization purposes.
WARNING: Pressing the diptube into the liner
fitment creates a safety hazard.
NOTE: New diptube assemblies from Entegris are
pre cleaned and ready for use. No further cleaning
is required prior to the initial use.
5. The filled canister is ready to be capped, Figure 30.
Figure 30. Installed diptube.
CAPPING A FILLED CANISTER
After filling a canister, the chemical supplier uses
a closure to cap the canister and make it ready for
shipping. Most canisters use a two-piece aluminum
closure with breakseal. Only the 20-liter canister uses
the one-piece closure, and only when used with an
ND-LD dispense connector. Follow the appropriate
procedure, below.
IMPORTANT: It is the chemical supplier’s responsibility
to use the correct closure for the canister being capped.
Do not overtighten. If the closure or canister threads
are damaged or cross-threaded, liquid dispense may be
affected. See page 19 for recommended torque values.
Two-Piece Closures
Use this procedure to cap a filled canister with a
two-piece closure.
Tools Required (see Required Tools, page 28)
PART NUMBER
Tool
4- to 40-liter
canister
200-liter
canister
Torque wrench
NA-18
NA-92
Torque
adapter tool
NA-10
DA-06
Breakseal
insertion tool
NA-23
NA-23
Items needed:
One breakseal for each two-piece closure. See
Two-Piece Closure Replacement Parts, page 23,
for ordering information.
1. Inspect the closure, Figure 31, to ensure that both
pieces are clean and that no parts are worn out or
damaged. See Closure Maintenance on page 23
for cleaning and replacement procedures.
a. Verify the compression ring is in place in the
closure base.
b. Verify that the appropriate O-rings are in place
to ensure a proper seal.
c. Verify that the cap O-ring is not excessively worn.
NOTE: New closure assemblies purchased from Entegris
can be used “as is” due to cleanroom manufacturing.
No further cleaning is required prior to use.
Cap (O-ring installed from below)
Breakseal
Closure base
Compression ring
Closure seal O-ring
Figure 31. Two-piece closure (4- to 40-liter closure shown).
