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Advances in Compressor Anti-Surge Valve Design Enhance Reliability and Performance

Advances in Compressor Anti-Surge Valve Design Enhance Reliability and Performance
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Advances in Compressor Anti-Surge Valve Design Enhance Reliability and Performance - 1

FLOWSERVE WHITE PAPER Advances in Compressor Anti-Surge Valve Design Enhance Reliability and Performance FLOWSERVE WHITE PAPER By Bradford Haines and Michael P. Nelson Flowserve Corporation

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Advances in Compressor Anti-Surge Valve Design Enhance Reliability and Performance - 2

Advances in compressor anti-surge valve design enhance reliability and performance Centrifugal and axial compressors are some of the most critical components used within a process plant to handle gases. These machines impart energy to the process fluid, helping to create optimum process conditions while also allowing the transfer of fluid. They typically comprise a major portion of the equipment cost on a project and thus generally do not have a spare or stand-by equipment. Proper operation of these machines is imperative to the ensure the plant runs safely and reliably. However, these...

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Advances in Compressor Anti-Surge Valve Design Enhance Reliability and Performance - 3

Positioner feedback mechanisms enable precise controllability Operators must be able to precisely control an anti-surge valve's stroke position to account for frequent small upsets. This gives operators the ability to make minor adjustments when running close to the surge line, allowing for enhanced productivity. To ensure proper control, the positioner needs to receive accurate feedback to determine the current valve stroke position. A typical positioner has a feedback shaft that rotates as the valve strokes. The starting rotation angle of the positioner feedback shaft indicates the valve...

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Advances in Compressor Anti-Surge Valve Design Enhance Reliability and Performance - 4

Evaluating air cushion requirements Air cushions are not always needed. For large valves (8 NPS and larger), to estimate air cushion requirements based on velocity at impact, use the following formula: Consider valves that have undergone extensive OEM testing and evaluation. OEMs who use testing methods such as computational fluid dynamics (CFD) analysis can ensure valves are going to perform as expected under a variety of conditions. CFD is used to analyze, optimize and verify the performance of valves to confirm they will perform as initially designed. Where: Vi = Velocity at impact...

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Advances in Compressor Anti-Surge Valve Design Enhance Reliability and Performance - 5

About the authors Bradford Haines Brad has more than 25 years of experience with Valtek® and Flowserve, contributing and leading as an application engineer, project manager and product manager. He excels in finding solutions to difficult applications. As a project manager, Brad regularly has delivered technically complex, multimillion-dollar projects. Over his career, he has successfully envisioned, led and delivered a multitude of new products and critical product enhancements. Some of these include: the Survivor™ anti-erosion control valve; the VL-ES pneumatic actuator product suite; Mark...

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