User guide

Inlets 8
Advanced User Guide 241
Stage 3. Purge and cleanup
The split valve opens again and the system returns to the Stage
1 configuration but with different setpoints. The PTV inlet is
flushed. Additional ramp rates are available to thermally clean
the inlet or to reduce inlet temperature after sample transfer.
This can extend the life of the liner.
Temperature, pressure, and flow considerations
The solvent vent mode goes through three distinct pneumatic
states; venting, sample transfer, and purging. The vent portion
allows the inlet pressure and the vent flow to be adjusted to
optimize solvent elimination. The transfer state mimics
traditional splitless operation and transports the analytes from
the liner to the column. The purging mode allows the user to
prepare the inlet for the next run.
Valve
Frit Frit
Valve
EPC Module
Valve
Split Vent Trap
PTV Inlet Weldment
FS = Flow Sensor
PS = Pressure Sensor
FS
PS
PS
Split
Carrier Supply
80 PSI
Septum Purge
Column