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5.3 MS - Check points
5 Service Instructions
56
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:
x
Burnished traces in the material.
x
Dents and pits having a granular and shiny
surface.
Surfaces particularly subjected to erosion are:
1.
The underside of the distributor in the vicinity
of the distribution holes and wings.
2.
The internal surface of the bowl body that
faces the conical part of the distributor.
Look carefully for any signs of erosion damage.
Erosion damage can deepen rapidly and
consequently weaken parts by reducing the
thickness of the metal.
WARNING
Disintegration hazard
Inspect regularly for erosion damage. Inspect
frequently if the process liquid is erosive.
WARNING
Disintegration hazard
Erosion damage can weaken parts by
reducing the thickness of the metal.
Replace the part if erosion can be suspected
of affecting its strength or function.
G
0
2
0522
1
Maximum depth of damage
G
0
5
8991
1
Erosion check points
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