Fisher

End of Life Expectancy for Final Control Elements in Safety and Control Systems

End of Life Expectancy for Final Control Elements in Safety and Control Systems

To summarize, mechanical equipment such as shutdown valves, control valves, actuators, and accessories such as positioners are designed keeping in mind a plant’s life of around 25 years. Though you may not find any written or stated document from any supplier or manufacturers since mechanical deterioration depends on many parameters like internal process-related conditions or external environmental conditions, operating media (air, hydraulic fluid, etc.), proper care exercised during application selection & sizing, and more.

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Continuously Monitoring Overpressure Devices

Continuously Monitoring Overpressure Devices

In a Processing article, Monitoring pressure relief valves as part of a digital ecosystem reduces cost and improves performance, Emerson’s Marcio Donnangelo and Marcelo Dultra describe how continuous monitoring “can identify when pressure incidents happen while monitoring valve conditions to simplify maintenance programs.”

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Compressor Anti-Surge Control Value Improvement Practice

Compressor Anti-Surge Control Value Improvement Practice

An ethylene plant has a number of very large, very critical compressors which will cause the entire plant to shutdown if they ever trip. The cracked gas compressor increases the entire cold-side feed from around 3 psig to ~475 psig, typically through 5 stages. The two refrigeration compressors are the next biggest compressors that can also shut down the entire plant if they trip.

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The opinions expressed here are the personal opinions of the authors. Content published here is not read or approved by Emerson before it is posted and does not necessarily represent the views and opinions of Emerson.