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Site Preparation
The gas plumbing
Figure 3. Two-stage pressure regulator
The type of regulator you use depends upon gas type and supplier. The Agilent
catalog for consumables and supplies contains information to help you identify
the correct regulator, as determined by the Compressed Gas Association (CGA).
Agilent Technologies offers pressure-regulator kits that contain all the materials
needed to install regulators properly.
Pressure regulator-gas supply tubing connections
The pipe-thread connection between the pressure regulator outlet and the fitting
to which you connect the gas tubing must be sealed with Teflon tape.
Instrument grade Teflon tape (part no. 0460-1266), from which volatiles have
been removed, is recommended for all fittings. Do not use pipe dope to seal the
threads; it contains volatile materials that will contaminate the tubing.
Traps
Using chromatographic-grade gases insures that the gas in your system is pure.
However, for optimum sensitivity, it is highly recommended that you install high-
quality traps to remove traces of water or other contaminants. After installing a
trap, check the gas supply lines for leaks.
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