6.1 Check of cleaning 6 Cleaning
48
6.1 Check of cleaning
The bowl should be dismantled and the cleaning
checked approx. 3 – 4 days after the first
operation with process liquid. Repeat the check
after a further 14 days. If the results are
favourable, the bowl can be left untouched until a
minor overhaul is due. This should normally be
made after about 3 months.
Inspect all discs. The upperside as well as the
underside of every disc must be bright. Fatty
discs and sediment residues on the discs indicate
bad cleaning.
If the bowl turns out to be badly cleaned, check
the temperature and concentrations of the acid
and lye. Correct any deviations from the
recommended values. Do not sample the
concentration once only, but preferably 5 or 6
times at regular intervals during the entire
cleaning cycle. In this way any fluctuations in the
concentration can be verified.
NOTE
A greyish film (but not containing process
liquid residues) may also occur on the discs
if the lye has been circulated after the acid.
To remove the film an extra run with acid for
about 10 minutes is recommended.
G0695811
1. 1st run with process liquid
2. 1st inspection
3. 2nd inspection
4. Routine inspection
5. 3-4 days
6. 14 days
7. Approx. 3 months
G0695921
G0696021
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