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One lesson per day: Understanding PID diagrams – Lesson 3

2021-04-07View Original

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Used for accident handling; (this valve is not required during normal operation.) CSO indicates that the valve is sealed in the open position, while CSC indicates that it is sealed in the closed position. Valves used for starting up, shutting down, and maintenance: LO indicates that the valve is locked when it is in the open position, while LC indicates that the valve is locked when it is in the closed position.

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