1 Installing the GC
28 Installation and First Startup
Step 8 Connect Gases and Traps
Most of installation involves plumbing gas to tanks, filters, and flow modules. Swagelok fittings
are used to make leak-tight connections. If you are not sure how to make a Swagelok
connection, see Appendix A, “Making Swagelok Connections” for instructions.
Hydrogen is a flammable gas. If hydrogen or any other flammable gas is used, periodic leak
tests should be performed. Be sure that the hydrogen supply is off until all connections are
made, and insure that the inlet fittings are either connected to a column or capped at all times
when hydrogen gas is present in the instrument.
Substituting parts or performing any unauthorized modification to the instrument may result
in a safety hazard.
The insulation around the inlets, detectors, valve box, and the insulation cups is made of
refractory ceramic fibers (RCF). To avoid inhaling RCF particles, we recommend these safety
procedures: ventilate your work area; wear long sleeves, gloves, safety glasses, and a
disposable dust/mist respirator; dispose of insulation in a sealed plastic bag; wash your
hands with mild soap and cold water after handling RCFs.
Install the gas regulators
1 Select the appropriate CGA regulator for each gas type. (In other countries, refer to local
standards. See the Agilent GC, GC/MS, and ALS Site Preparation Guide for requirements.)
Never use a liquid thread sealant on gas fittings. Liquid thread sealants introduce
contamination into the GC plumbing.
2 Confirm that the outlet fitting of the regulator is 1/8-inch Swagelok. If not, install the
appropriate adapter fitting. Wrap 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.
Tighten the Swagelok adapter fitting securely to the NPT pipe thread fitting.
Table 4 Gas regulators, 1/8-inch, U.S. only
*
* For 1/4-inch tubing, purchase a 1/4-inch to 1/8-inch adapter, U.S. only.
Description Part number
CGA 346, 125 psig max (8.6 bar), Air 5183-4641
CGA 350, 125 psig max (8.6 bar), H2, Ar/Me 5183-4642
CGA 540, 125 psig max (8.6 bar), O2 5183-4643
CGA 580, 125 psig max (8.6 bar), He, Ar, N2 5183-4644
CGA 590, 125 psig max (8.6 bar), Air 5183-4645
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