They were experiencing
poor balance device life
due to the disc/counter
disc design (no thrust
bearing) and locating
the balancing disc using
a shaft screw. The
operating life of the
pumps between major
overhauls on occasion
did not reach 10,000
hours.
With the help of Sulzer
Pumps retrofit know-how
the inner pump cartridge
was replaced, providing
improved mechanical
properties and a
significant increase of
pump efficiency of over
10 %.
The operational lifetime
between overhauls was
extended to more than
50,000 hours, even after
40,000 hours operation
no decrease in
efficiency was apparent.
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