Inlets and valves
6850
6850
Released: April 2004 6850 Series Gas Chromatograph Service Procedures 128
Replacing the Actuators
The actuators use pneumatic pressure (40 to
70 psi) to switch the valves between their two
positions.
NOTE: The valves and the valve box must be
installed before installing the actuators.
1. Remove the grenade style pin from the hole
on the actuator marked with the correct
degree of rotation, as shown below:
• Four port valves—Remove the pin from
the 90° hole
• Six port valves—Remove the pin from
the 60° hole
• Ten port valves—Same as six port
valves, but with the tubular 36° actua-
tor limiter on the pin.
Figure 1-48. Setting the actuator’s degree
of rotation
2. Remove the actuator mounted over each
valve (installed using two Torx T-20 screws).
60°
90°
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