Metrohm 883 Basic IC plus Manual page 70

4.6 Servicing the high-pressure pump
Spare parts
62
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Cleaning the outlet valve
If the outlet valve cannot be cleaned, you will need a new outlet valve
(6.2824.160) for this step.
1 Removing the outlet valve
Unscrew the connection capillary to the auxiliary piston from the
￭
outlet valve holder (18-2) (1).
Start by loosening the outlet valve holder with the adjustable
￭
wrench and then unscrew it by hand (2) and remove it.
Remove the outlet valve from the outlet valve holder (3).
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2 Cleaning the outlet valve
Start by rinsing the outlet valve in the direction of eluent flow
￭
using a wash bottle filled with ultrapure water, RBS™ solution or
acetone. (The direction of eluent flow is marked on the valve by
an arrow.)
The rinsing solution must come out at the valve outlet.
If no more solution comes out, then the valve is blocked.
Rinse the outlet valve in the direction opposite the eluent flow
￭
using a wash bottle filled with ultrapure water, RBS™ solution or
acetone.
The rinsing solution may only come out at the valve outlet.
The outlet valve must be replaced if it is still clogged after cleaning.
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883 Basic IC plus