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Agilent 6890 Gas Chromatograph Service Manual
Gases 520
Supplying valve actuator air
Supplying valve actuator air
Some valves use pressurized air for actuation (others are electrically or
manually driven). Actuator air must be free of oil, moisture, and particulates.
It can be supplied from a dried regulated cylinder, although “house” air
supplies or air from a compressor are acceptable.
Most valves require 20 to 40 psi of pressure to operate. High-pressure valves
may require 65 to 70 psi.
Valves require a dedicated air supply. Do not share valve air supplies with
detectors.
See "Valve Control" in the Agilent 6890 GC Operating Manual/CD-ROM for
more valve requirements.
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