FDM P 605, Руководство пользователя, Страница: 41 / 181

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5 Service instructions 5.3 Check points at Intermediate Service
5.3.3 Cracks
Cracks can initiate on the machine after a period
of operation and propagate with time.
• Cracks often initiate in an area exposed to
high cyclic material stresses. These are called
fatigue cracks.
• Cracks can also initiate due to corrosion in an
aggressive environment.
• Although very unlikely, cracks may also occur
due to the low temperature embrittlement of
certain materials.
The combination of an aggressive environment
and cyclic stresses will speed-up the formation
of cracks. Keeping the machine and its parts
clean and free from deposits will help to prevent
corrosion attacks.
!
WARN
ING
Disintegration hazard
All forms of cracks are potentially dangerous as
they reduce the strength and functional ability of
components.
Always replace a part if cracks are present.
It is particularly important to inspect for cracks in
rotating parts and especially the pillars between
the sludge ports in the bowl wall.
Always contact your Alfa Laval representative
if you suspect that the largest depth of the
damage exceeds 1,0 mm. Do not continue to
use the separator until it has been inspected
and cleared for operation by Alfa Laval.
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