Chemical Processes And Technology - W&H teon + RID-200 Operating Instructions Manual

Chemical processes and technology

In this section, you will find a description of the causes of common chemical reactions
which can occur between different types of soiling, process chemicals and the compon-
ents of the machine, along with their remedies as necessary.
This section is intended as a guide. If unforeseen interactions occur during reprocessing or
if you have any queries on this subject, please seek advice from W&H.
General notes
Problem
If elastomers (hoses and seals) and plastics
in the machine are damaged, for example
by swelling, shrinking, hardening or brittle-
ness of materials, tears and cracks, com-
ponents will not function correctly and this
generally leads to leaks.
Heavy foaming during a programme affects
cleaning and rinsing results. Foam escaping
from the wash cabinet can cause damage
to the washer-disinfector.
Cleaning processes cannot be regulated
and validated where there has been a build-
up of foam.
Corrosion to stainless steel in the wash
cabinet and to accessories can give them a
different appearance:
– rust (red marks / discolouration),
– black marks / discolouration,
– white marks / discolouration (etched sur-
face).
Corrosive pitting can lead to the washer-
disinfector not being water-tight. Depending
on application corrosion can influence
cleaning and rinsing results or cause corro-
sion to stainless steel items in the cabinet.
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How to resolve it
– Establish the cause of the damage and
rectify it.
See information regarding "Chemical
agents", "Soiling" and "Reaction between
chemical agents and soiling".
– Establish the cause of the foam and rec-
tify it.
– Check the process used regularly to mon-
itor foaming levels.
See information regarding "Chemical
agents", "Soiling" and "Reaction between
chemical agents and soiling".
– Establish the cause of the corrosion and
rectify it.
See information regarding "Chemical
agents", "Soiling" and "Reaction between
chemical agents and soiling".