Large Valve Single Device Isolation Problems & Solutions

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Large Valve Single Device Isolation Problems & Solutions

Hydro Vision 2008 Turbine Inlet Valve Disc â Casting Plug Failure

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Seal Upgrade<br />

• SDI failed twice on two 6 ft dia. butterfly<br />

valves due to excessive seal leakage

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A how to guide…

Box Canyon Hydro-electric Facility

Cranes and Crane Operators and Construction Work

Application of EMI Diagnostics to Hydro Generators

Dale Doughty

A New Low Head Turbine

Turbine Refurbishment

ASSESSMENT

Box Canyon Hydro Project

Eugene Water & Electric Board

In Situ Francis Turbine Blade Replacement due to Gross Cavitation

FRANCIS TURBINE SEAL RING REPLACEMENT

Training Considerations

Corrosion Coatings and Hydropower

Seal Upgrade • SDI failed twice on two 6 ft dia. butterfly valves due to excessive seal leakage

Original seal design

Page 1 and 2: Large Valve Single Device Isolation
Page 3 and 4: What is required for SDI Certificat
Page 5 and 6: Typical SDI Valve Problems • Crac
Page 7 and 8: 13 Ft. Dia. Butterfly Valve
Page 9 and 10: Failed plug in a Spherical Valve
Page 11 and 12: Typical Cracked Weld
Page 13 and 14: Crack % % Cracked Welds vs. Valve D
Page 15 and 16: Preliminary Observation • Cast va
Page 17 and 18: How To Fix The Crack!
Page 19 and 20: 13 Ft. Dia. Butterfly Valve
Page 21: Cover Plate Weld Conclusions • Ca
Page 25 and 26: New Seals Being Installed
Page 27 and 28: Leakage Through New Seals
Page 29: The End (time to wake up!) Dan Camp