Agilent Technologies 6890 Series Service Manual page 652

Installing the valve actuator drivers
The valve actuators are driven by solenoid drivers which, when activated,
send high pressure air to the actuator to switch the valve.
Assemble the valve driver block
The valve driver block accommodates up to four valve drivers. A valve driver
must be installed for each valve/actuator installed.
Assemble the valve driver block as in Figure 1130-4. The example in this
procedure shows a valve driver block parts breakdown for a two valve system.
1. Install two mounting posts on the intake/exhaust endplate (two large
threaded holes). Install an O-ring in the supply/exhaust ports on the
inside of the plate.
2. Slide a valve driver over the mounting posts in the orientation shown.
Install two O-rings in the valve driver supply/exhaust ports as shown.
Screw plugs
(may not be present)
Figure 1130-4
Jun 2001
Installing the valve actuator drivers
Mounting posts
O-ring
Assembling the valve driver block
Valves
Agilent 6890 Gas Chromatograph Service Manual
Actuators 1130
5 of 12