Vacuum System 6
5977B Series MSD Troubleshooting and Maintenance Manual 167
Compression seals
A compression fitting consists of a threaded fitting on the analyzer chamber
and a threaded collar with a ferrule and O-ring. A cylindrical part fits inside
the collar. Tightening the collar presses the ferrule, compressing the O-ring
around the part. The calibration vials use compression seals.
High voltage feedthrough seal
The high voltage (HED) feedthrough seal is an O-ring that is compressed
against the side plate by a threaded collar.
Figure 32 Vacuum seals
Side plate O-ring seal
KF seal with internal
centering ring
KF seal with external
centering ring
Compression seal
(clamp not shown)
(clamp not shown)
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