Critical for efficient airflow; often replaced in full sets to maintain rotor balance. Inlet Guide Vanes (IGVs): Regulate air intake.
For example, a set of GE 7FA stage 1 buckets can be refurbished multiple times before needing total replacement. This "circular economy" approach within turbine maintenance significantly lowers the Levelized Cost of Energy (LCOE) for power plants. The choice between buying new spares and repairing existing ones is a constant calculation of risk versus cost.