Manually Controlled Inlet - Agilent Technologies 6890 Series Service Manual

Manually controlled inlet

In a manually controlled purged packed inlet, carrier gas flow enters through
the mass flow controller, into the top of the inlet. The septum purge regulator
(SPR) in the septum purge line, determines the fraction of the stream that is
split off to purge the septum. This fraction of the stream then flows out
through the purge vent. The majority of the carrier stream enters the inlet
insert and then the column.
Total
flow
control
Figure 220-3
Jun 2001
Septum purge
Septum holder
To Column
and Detector
Manual control packed column inlet (flow control mode)
Inlets
Agilent 6890 Gas Chromatograph Service Manual
Purged/Packed Inlet
Theory of operation
regulator
SPR
Purge Vent Flow
220
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