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Two-Stage Pressure Regulators
Getting Started
To eliminate pressure surges, use a two-stage regulator with
each gas tank. Stainless steel, diaphragm-type regulators
(Figure
1) are recommended.
Figure 1
Two-stage pressure regulator
The type of regulator you use depends upon gas type and
supplier. The Agilent consumables and supplies catalog
contains information to help you identify the correct regulator,
as determined by the Compressed Gas Association (CGA).
Agilent offers pressure-regulator kits that contain all the
materials needed to install regulators properly.
On/Off valves mounted on the outlet fitting of the two-stage
regulator are not essential but are very useful. Be sure the
valves have stainless-steel, packless diaphragms.
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 and create ghost peaks and noisy baselines.
Site Preparation
31
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