IGVs deliver air to the inlet of a gas turbine’s axial compressor. While maintaining proper fuel-to-air ratio through various load ranges, they minimize the potential for unwanted emissions. In present-day Combined Cycle power plants, IGVs ultimately control the exhaust gas temperature – a critical input to the Heat Recovery Steam Generator (HRSG).
Many current day turbines use low NOx combustors that require a lean air-fuel mixture. As hot gas temperatures decrease, the formation of NOx also decreases. With a higher air mix, it’s critical to control the exact amount of air into the combustors – especially during low loads.
REXA’s Electraulic™ Actuators provide responsive, repeatable control for IGV applications on all major manufacturers’ combustion turbines. Once installed, a plant operator will almost immediately notice improved control of the combustion turbine IGVs at low loads. This results in consistent, reliable exhaust temperatures through the entire load range. Our actuators’ reliability is unmatched with no required oil maintenance – eliminating unscheduled down time.
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