Metrohm 872 Extension Module IC Pump - Manual (Page 55)

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6 Operation and maintenance
872 Extension Module IC Pump
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1
2
3
4
Figure 31 Removing valves
1 Outlet valve holder 2 Outlet valve
Order number: 6.2824.160
3 Inlet valve
Order number: 6.2824.170 4 Inlet valve holder
2 Cleaning undissected valve
Clean contaminated or blocked valves initially without dismantling
them completely.
￭ Rinse the valve in eluent flow and counterflow direction using a
spray bottle filled with ultra pure water, RBS solution or acetone.
￭ The rinsing effect is further increased through a short treatment
(lasting for a maximum of 20 s) in an ultrasonic bath.
Note
Longer lasting ultrasonic baths can damage the ruby ball of the
valve.
Only if this cleaning is useless, dismantle the valves separately and
clean the components.
3 Dismantling valve
Dismantle every valve separately.
Note
For dismantling the valve the 6.2617.020 tool for valve cartridges
is required.