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9
Maintenance
Replacing the Purge Valve Head
Replacing the Purge Valve Head
When
In case of problems with the purge valve
Parts required
#
1
1
1
1
Preparations
Remove all capillary connections to the purge valve
Potential damage of valve head or malfunction of valve
C A U T I O N
When the pump is switched on, the valve tag is accessed (read/write) and used for
correctly positioning the valve.
If the valve head is replaced while the pump is on, invalid information may be written to
the valve head making it unusable, or positioning may be wrong resulting in wrong flow
connections inside the valve potentially damaging parts.
➔
Bias measurement results
C A U T I O N
The valve drive contains sensitive optical parts. Pollution of these parts can impair the
accurate selection of valve ports and therefore bias measurement results.
➔
154
p/n
5067-4119
5067-4655
G4220-87000
5067-4656
Switch off the pump before working on the purge valve.
Protect the optical parts from dust and other pollutions.
Description
Purge valve head
Capillaries to pump head assemblies channel A and B (2x)
Capillary SST Valve to Jet Weaver 300 mm x 0.17 mm I.D.
Capillaries to pressure sensor (2x)
Agilent 1290 Infinity Binary Pump User Manual
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