Chapter 8 - Operating Procedures
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MNL000302.doc
Revision 2
01/04/2019
SourceSystemTE11
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8.3.2.2 Empty Process Gas Cylinder Removal
1.
Verify that "PRE-PURGE COMPLETE" is displayed in the controller status box.
2.
On the Main Menu screen, for the side you are changing, select “—START—CHANGE
CYLINDER”.
3.
Follow prompted information on the screen.
While the system is waiting for you to replace a cylinder, a trickle purge of the high pressure tubing
may begin and continue until you press , acknowledging the prompt "Remove and Replace
Cylinder", indicating the cylinder change is complete.
4.
Don the self-contained breathing apparatus and all other Personal Protective Equipment
(PPE) if required, if not done already. See Chapter 1 Section 9 for details on the required
PPE.
5.
Verify that exhaust system is working.
6.
Open access window.
7. Recheck that process cylinder valve is closed.
Do not use a wrench or other devices to
close diaphragm type cylinder valves. This
could cause valve failure. The maximum
torque on diaphragm type cylinder valves is
12 foot/pounds (16.3 Nm). Certain gases
are supplied with cylinder valves without
hand wheels. Use the proper tool from your
gas supplier to operate these valves.
8.
Loosen and remove the pigtail cylinder connection from the gas cylinder using appropriate
tools to support the connection and pigtail tubing. Note proper direction of rotation. Fittings
with left-hand threads have notched hex corners. Observe and listen for any sound of gas
leakage. Close door immediately if the process gas cylinder valve is leaking and evacuate the
area.
9.
Install cylinder valve outlet plug/cap securely into/onto process cylinder valve outlet.
This valve outlet cap must be used on all
toxic, corrosive and pyrophoric gases.
Consult your supplier if there is no cap on
these gas cylinders.
10. Install pigtail cap/plug onto pigtail cylinder connection.
OK