1290 Infinity Quaternary Pump User Manual 145
Maintenance
9
Replacing the Multi-Channel Gradient Valve (MCGV)
Replacing the Multi-Channel Gradient Valve (MCGV)
Tools required p/n Description
0100-1710 Mounting Tool for Tubing Connections
8710-0899 Pozidriv screwdriver
Parts required p/n Description
G1311-67701 Multi channel gradient valve (MCGV)
Preparations • Switch off pump at the main power switch
• Remove the front cover
• Use an optional solvent shutoff valve or lift up solvent filters inside solvent bottles for avoiding
leakages
For best performance and life time, use lower channels A and D for aqueous solvents in
buffer applications, see “Operational Hints for the Multi Channel Gradient Valve
(MCGV)” on page 81 for details.
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