Agilent Technologies 6890 Series, Service Manual, Page: 635 / 867

1110 Valves
General purpose valves
4 of 6
Jun 2001
Valves
Agilent 6890 Gas Chromatograph Service Manual
General purpose valves
The 6- and 10-port general purpose valves are suitable for column switching,
isolation, backflushing, and other uses as well as gas sampling.
Gas sample valves
The standard gas sample valves have 1/16-inch zero dead volume fittings and
an internal port diameter of 0.016-inch.
Figure 1110-2 6-port valve (actuator side view) showing flow path grooves
Gas sample loops
A 0.25 mL sample loop is included with all gas sampling valve systems. 10 mL
and 5 mL loops occupy one valve position, limiting the number of valves that
can be housed in a valve compartment.
Adjustable restrictor valves
Adjustable restrictors are used to balance flow resistance between the two
valve positions. They are available with ambient to 225°C (part no. 0101-0633)
or ambient to 350°C (part no. 0101-0948) operating ranges.
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CCW
stop
CW
stop
OFF ON