Abstract
Turbomachinery Controls dedicated to centrifugal and axial compressors use several types of control valves, such as: Antisurge (recycle) valve Suction throttle valve Hot-gas bypass valve Quench control valve As the final control element in its control loop, these control valves are vital to implementing good turbomachinery controls. This tutorial will examine the control objective of each type of valve, its ideal location relative to the turbocompressor and the optimum performance characteristics for the valve. Valve selection criteria and sizing methodologies with examples will be addressed. Recommendations for valve noise abatement will be provided, as well as valve noiseabatement pitfalls that should be avoided will be identified. The possible negative or positive impact of annular seal on rotordynamics of compressors and steam turbines is discussed. The nature of destabilizing forces that can be developed by Asee-through@ and interlocking labyrinths is discussed.
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