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BEYOND SURFACES
Spring
16
The right coating not only enables extended service life,
but also longer inspection cycles and higher efficiency.
Both turbine design (Pelton, Francis, Kaplan) and
operating conditions are crucial factors for the
customization process. Pelton turbines are, for example,
used in areas with high head (more than 100 metres)
and small water quantities. In the opposite case –
namely with lower head and large water quantities –
a Kaplan turbine is generally used. The design of the
latter makes it more susceptible to destructive
cavitation, which affects both the choice of coating and
the turbine parts to be coated. The choice of wear
protection must also consider not just the amount of silt,
sand and shingle that is carried along with the water,
but also chemical contamination.
FACTS & FIGURES
Individually tailored