166 Agilent InfinityLab LC Series 1260 Infinity II Isocratic- and Quaternary Pumps User Manual
8
Maintenance
Exchange the Multi-Channel Gradient Valve (MCGV)
Exchange the Multi-Channel Gradient Valve (MCGV)
For bio-inert modules use bio-inert parts only!
Tools required p/n Description
8710-0899 Screwdriver Pozidrive Shaft
Parts required # p/n Description
1 G1311-67701 Multi channel gradient valve (MCGV)
OR 1 G5611-67701 Multi-Channel Gradient Valve (MCGV) (Bio-inert)
Preparations • Switch off the pump at the main power switch.
• Open the doors of the module.
• Use an optional solvent shutoff valve or lift up solvent filters in solvent reservoirs for avoiding
leakages.
The life time of the multi-channel gradient valve can be increased by regularly flushing the
valve, especially when using buffers. If using buffers, flush all channels of the valve with
water to prevent precipitation of the buffer, otherwise salt crystals could drop into an
unused channel and form plugs that may cause leaks of that channel. Such leaks will
interfere with the general performance of the valve. When using buffers in combination
with organic solvents, it is recommended to connect the aqueous solutions/buffers to one
of the bottom ports (A and D) and the organic solvent to one of the upper gradient valve
ports. It is best to have the organic channel directly above the buffer channel (e.g., A -
buffer, B - organic solvent).
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