Routine Maintenance: General
Maintaining a sampling valve (rotary type)
Released: March 2004 6850 Series II GC User Information page 115 of 256
8. Install the new rotor from the bottom so that the letter stamped in the top
of the rotor is nearest port 4 (pointing towards the gap in the index ring).
See Figure 21.
Figure 21. Top of rotor aligned towards port 4
9. Place the index pin cap over the valve, then screw the preload assembly
onto the bottom of the valve until tight.
10. If disconnected, reconnect the plumbing and check for leaks. Figure 22
shows a typical gas sampling valve installation for reference.
Figure 22. Gas sampling valve plumbing
11. Reinstall the actuator assembly.
12. Align the rotor as described in “Aligning the rotor” on page 110.
T
Mark stamped in
rotor
Port 4
Gap in index ring
Valve body
Rotor
ONOFF
(Load position) (Inject position)
Sample loop
Carrier in
To column
Sample in
Sample out
ON (CW) stop
OFF (CCW) stop
To Next Page
Loading...
