Agilent Technologies 8890 Maintaining Manual page 151

9 Maintaining the PTV Inlet
To Clean the Septumless Head on the PTV Inlet
Guide cap
PTFE ferrule
Ferrule, 1/16-inch
PTFE
Carrier gas tube
6 Unscrew the guide cap from the head and remove the PTFE ferrule.
7 Carefully insert a syringe with a 23-gauge needle into the head to press the valve body and
8 Gently tap the head on a soft, smooth surface so that the valve body falls out completely or
9 Remove the Kalrez seal from the valve body.
10 Clean all components in hexane.
Wear clean, lint-free gloves to prevent contamination of parts with dirt and skin oils.
C AU T I O N
11 Replace the PTFE ferrule. See
12 Wearing clean lint-free gloves, reassemble the head in reverse order. Be sure that the seals
13 Finger-tighten the septumless head, then tighten an additional 1/8 turn with a wrench.
14 Reconnect the carrier gas line.
15 Check for leaks; if necessary, slightly tighten the guide cap with the syringe needle inserted.
16 Perform an inlet Leak & Restriction test and reset the maintenance counters.
17 Exit maintenance mode. Select Maintenance > Instrument > Perform Maintenance >
18 Restore the analytical method.
Maintaining Your GC
Kalrez seal slightly out of the head.
slips out far enough to grasp with fingers.
Inlet" on page 152.
and the pressure spring are not damaged.
• If the head leaks with the syringe inserted, replace the PTFE ferrule.
• If the head leaks without the syringe inserted, replace the Kalrez and Viton seals.
Maintenance Mode > Finished.
Sealing element
"To Replace the Septumless Head PTFE Ferrule on the PTV
Kalrez seal
Valve body
Pressure spring
Viton seal
151