Installing the GC 1
Agilent 7890B Installation 23
the fitting threads using PTFE tape. Wrap the tape in a
clockwise direction so that the adapter threads do not
unwrap the tape. Be careful to keep the tape away from the
end of the fitting. Two to three tightly wound wraps are
sufficient. Never use a liquid thread sealant. Liquid thread
sealants introduce contamination into the GC plumbing
system. Tighten the Swagelok adapter fitting securely to the
NPT pipe thread fitting.
3 Install the regulator onto the compressed gas cylinder main
fitting.
• Check the thread type. Some regulators use left-hand
thread fittings. For left-handed threads, the nut will have
a groove in it.
Groove indicates
left-hand thread
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