Cold On-Column Injector Maintenance; Possible Leaks In The Rotary Valve - Thermo Scientific TRACE GC Ultra Maintenance And Troubleshooting Manual

Chapter 6
Maintaining a Cold On-Column Injector

Cold On-Column Injector Maintenance

This injector will normally be serviced by Thermo Fisher Scientific authorized
technical personnel and do not require periodic maintenance, except for septum
replacement in the automatic version. The PTFE seal of the rotary valve, if worn,
can be replaced by the user.

Possible leaks in the rotary valve

Some symptoms, particularly a low reproducibility in results, may indicate that
the connection between the rotary valve and the relevant PTFE seal is not in good
condition. Refer to Chapter 19,
To eliminate possible leaks on the rotary valve, tighten the Allen screws that fix
the upper and the lower parts of the injector, then test the injector to see if the
symptom has disappeared. If not, replace the seal of the rotary valve, as explained
in the
114
Replace the Rotary Valve Seal
Analytical Troubleshooting
Operating Sequence on page 115.
Maintenance and Troubleshooting Manual

Cold On-Column Injector Maintenance

for more information.