Machinery World Tetra Centri A 614HGV-14C, Service & Maintenance

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4 Dismantling/Assembly
4.6 Separator bowl
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.
A
WARNING
Disintegration hazard
Inspect regularly for erosion damage.
Inspect frequently if the process liquid is
erosive.
Always contact the supplier 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.
Surfaces particularly subjected to erosion are:
1. The sealing edge of the sliding bowl bottom,
and the seal ring in the bowl hood.
2. The bowl wall portions (“pillars”) between the
sludge ports in the bowl body.
Look carefully for any signs of erosion damage.
Erosion damage can deepen rapidly and
consequently weaken parts by reducing the
thickness of the metal.
A
WARNING
Disintegration hazard
Erosion damage can weaken parts by
reducing the thickness of the metal. Pay
special attention to the pillars between the
sludge ports in the bowl wall. Replace the
part if erosion can be suspected of affecting
its strength or function.
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