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Jun 2001
Site Preparation
Agilent 6890 Gas Chromatograph Service Manual
Gases 520
The gas plumbing
The gas plumbing
WARNING All compressed gas cylinders should be securely fastened to an immovable
structure or permanent wall. Compressed gases should be stored and handled
in accordance with the relevant safety codes.
Gas cylinders should not be located in the path of heated oven exhaust.
To avoid possible eye injury, wear eye protection when using compressed gas.
Follow the general plumbing diagram when preparing gas supply plumbing.
Figure 520-1 General plumbing diagram
• Two-stage regulators are strongly recommended to eliminate pressure
surges. High-quality, stainless-steel diaphragm-type regulators are
especially recommended.
Two-stage regulation
Main supply
on/off valve
Main gas
supply
On/off valve
Moisture
trap
Hydrocarbon
trap
Oxygen
trap
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