12 Maintenance
Replace Valve Heads
2D-LC User Guide 324
Replace Valve Heads
Replace Valve Heads (G7116B)
Several optional valve heads are available, which can be installed and exchanged
easily.
Parts required Description
Agilent Quick Change Valve Head.
The valve actuator contains sensitive optical parts, which need to be protected
from dust and other pollution. Pollution of these parts can impair the accurate
selection of valve ports and therefore bias measurement results.
 Always install a valve head for operation and storage. For protecting the
actuator, a dummy valve head (part of Transportation Lock Kit
(G1316-67001 )) can be used instead of a functional valve. Do not touch
parts inside the actuator.
Column Damage or Bias Measurement Results
Switching the valve to a wrong position can damage the column or bias
measurement results.
 Fit the lobe to the groove to make sure the valve is switched to the correct
position.
Valve Damage
Using a low pressure valve on the high pressure side can damage the valve.
 When using multiple column compartments as part of a method
development solution, make sure that the high pressure valve head is
connected to the autosampler and the low pressure valve head is connected
to the detector.
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