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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.
Released: April 2004
Figure 1-48. Setting the actuator's degree
2. Remove the actuator mounted over each
6850 Series Gas Chromatograph Service Procedures
60°
90°
of rotation
valve (installed using two Torx T-20 screws).
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