Replacing The Teflon Ferrule - Agilent Technologies 6890 Series Service Manual

240 Programmed Temperature Vaporization Inlet (PTV)
Replacement procedures
9. Check the entire system again for leaks; if necessary, carefully retighten
the guide cap with the syringe needle inserted slightly more and/or
replace the Kalrez seal.
If the head leaks when a syringe is inserted, the Teflon ferrule is the
problem. If the head leaks without a syringe inserted, the seals may need
to be replaced.

Replacing the Teflon ferrule

1. Unscrew the guide cap from the septumless head and remove the Teflon
ferrule.
Figure 240-21
32 of 46
Installing a Teflon ferrule
Inlets
Agilent 6890 Gas Chromatograph Service Manual
Jun 2001