A combined cycle gas turbine power plant in Asia needed to solve the problem of persistent trim and diffuser erosion in a competitor’s high pressure turbine bypass valves. The problems in the competitor bypass valves arose when the plant moved from base-loading to daily cycling and the installed bypass valves could not handle the frequent start-ups and shut-downs. Attempts by the manufacturer to overhaul the existing design of the diffuser failed to prevent further erosion -increasing the maintenance and operation costs. The plant operators advised their client to replace the valves. In early 2016 the plant operators challenged IMI CCI to solve the erosion issue and devise a solution that would fit the existing piping dimensions.
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