Chapter 8 - Operating Procedures
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01/04/2019
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h. Remember to mark the cylinder "FAULTY, BAD CYLINDER
CONNECTION."
13. With suitable means (helium mass spectrometer, thermal conductivity detector, or liquid leak
detector - as specified for area), inspect the cylinder connection and pigtail connection for
leakage. Pay particular attention to the point where the nipple passes through the nut.
8.3.1.4 Putting Purge Gas Cylinder On-Stream
1.
Open access window and open purge cylinder valve.
2.
Slowly open manual valve MV13 for approximately 15 seconds to remove air from pigtail,
then close.
3.
Slowly open manual isolation valve, MV10, to regulator.
4.
Adjust the purge gas regulator, PCV2, to 80-90 psig (5.51-6.20 barg) delivery pressure.
5.
Close access window.
6. The inert purge gas system is now ready for use.
8.3.2 Process Gas Cylinder Procedures
8.3.2.1 Empty Process Gas Cylinder Removal (Prior to Removal)
This procedure assumes that a process gas cylinder and an inert purge gas cylinder are in place and
operating.
Before approaching a hazardous gas
cabinet for a cylinder change, verify that
there are no alarm labels displayed on the
screen and that the exhaust system is
functioning correctly Only operators
trained in these procedures and the
GASGUARD® hazardous gas system are
permitted to change cylinders. The
appropriate Personal Protective Equipment
(PPE) must be worn when performing any
Process Cylinder Procedures. See Chapter
1 Section 9 of this manual for the
appropriate PPE.