Alfa Laval MMPX 303SGP-11, Руководство пользователя

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5 Service Instructions 5.3 Check points at Intermediate Service
5.3.2 Erosion
Erosion can occur when particles suspended in
the process liquid slide along or strike against a
surface. Erosion can become intensified locally
by flows of higher velocity.
Always contact your Alfa Laval representative if
the largest depth of any erosion damage exceeds
1,0 mm. Valuable information as to the nature of
the damage can be recorded using photographs,
plaster impressions or hammered-in lead.
Erosion is characterised by:
•
Burnished traces in the material.
•
Dents and pits having a granular and shiny
surface.
Parts of the bowl particularly subjected to erosion
are:
•
The paring disc.
•
The top disc.
•
The underside of the distributor in the vicinity
of the distribution holes and wings.
•
The sludge ports.
Look carefully for any signs of erosion damage.
Erosion damage can deepen rapidly and
consequently weaken parts by reducing the
thickness of the metal.
DANGER
Disintegration hazard
Inspect regularly for erosion damage. Inspect
frequently if the process liquid is erosive.
G
0
20
52
21
Maximum permitted erosion
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