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Septum purge
regulator
fixed @ 3 mL/min
Pressure sensor
Flow sensor
Carrier supply total flow in
55
20 psi
mL/min
Pressure
100 psi input pressure
control
Total flow
loop
Split vent
control loop
50 mL/min
Proportional
valve 1
Split vent trap
Purge valve
Gold seal
open
Proportional
Reduced flow
valve 2
Full flow -
split flow path
Column flow: 2 mL/min
Released: April 2004
6850 Series Gas Chromatograph Service Procedures
277
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