Runner and component inspection
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Runner and component inspection
Turbine components are exposed to high mechanical loads and experience many load cycles, which leads to fatigue of the material. Regular inspections are very important to prevent serious damage (e.g. cracks or even breakdowns) and to ensure operational safety.
What do we offer?
- Carrying out non-destructive tests on runners and other components
- Assessment of the test result (PT, MT & visual inspection)
- Independent assessment on the current condition
- Recommendations for further operation or revision
- Identification of potential (hydraulics, strength, etc.)
Your benefit
As a customer, you can rely on our many years of experience in the power plant sector. Our assessment focusses on the operational safety of the plant. However, we are convinced that with the right planning and suitable measures, this is entirely compatible with economic requirements.
The following scope of delivery can be customised according to customer requirements
KAPLAN
Scope of supply
Dye penetrant testing (PT) of the transition from blade to blade disc
MT crack inspection of the bucket’s highly stressed notch
Visual inspection of the water-wetted surfaces (damage, leakage, etc.)
Inspection report with assessment of the results
Optional
Visual inspection of volute, stay and guide vanes, casing, incl. cone
PELTON
Scope of supply
MT crack inspection of the buckets incl. protocol
Visual inspection of the wheel for abrasion, cavitation or mechanical damage.
Optional
Inspection report with assessment of the test results incl. recommendations. Free measurement of the bucket natural frequency (impact test)
FRANCIS
Scope of supply
- MT crack inspection of the highly stressed notch (outlet side)
- Visual inspection of the wheel for abrasion, cavitation or mechanical damage
Optional
Inspection report with assessment of the test results incl. recommendations.

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contact
NG Hydro GmbH
Hauptstrasse 18
CH-6034 Inwil
Schweiz
+41 (0)79 569 76 29 | info@nghydro.ch