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Gas and Plumbing Requirements
Verify with your gas supplier the type of CGA fitting on the gas bottles you order.
Be sure these fittings match the regulators described in
this chapter. If not, contact your gas supplier or your area Thermo Fisher
Scientific sales representative to make the appropriate changes.
Secondary Gas Regulators
Because secondary regulation of carrier, fuel, and make-up gases may be provided
downstream of the cylinder regulator, a single- or dual-stage regulator is
acceptable, but it must use a stainless steel diaphragm.
Gas Tanks
Gas tanks should be placed where they cannot damage cables or gas lines. Use
standard safety practices for securing gas tanks and bottles. Gas supply lines
should terminate with 1/8-in. female Swagelok connectors.
Stored gases should be placed in an area where a wide temperature variation will
not occur. Don't forget to plan for gas cylinder storage when preparing your
laboratory.
WARNING! Do not place gas tanks in the path of the GC oven exhaust.
Site Preparation and Installation Manual
Figure 1-3. Dual-Stage Gas Regulator
Chapter 1
Laboratory Preparation
Purity Requirements
in
35
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