Agilent Technologies 1220 Infinity II LC

1220 Infinity II LC System User Manual 255
Maintenance and Repair
11
Solvent Delivery System
4 Using a pair of tweezers or a toothpick, remove the frit.
Figure 64 Purge Valve Parts
5 Place a new frit into the purge valve, with the orientation of the frit as
shown above.
6 Reinstall the seal cap including the gold seal.
7 Insert the purge valve into the pump head and fix it with a 14 mm wrench.
Valve body
PTFE frit
Gold seal
Plastic cap
NOTE
Before reinstallation always check the gold seal in the seal cap. A deformed seal cap
should be exchanged.
CAUTION
Damage to the purge valve
➔ Do not lift the pump using the purge valve as a handle, it might get leaky.
➔ Do not try to turn the purge valve into the correct position when already fixed to the
pump. The rubber o-ring might break.
➔ Anticipate the correct position of the connections before tightening the valve.