Valve Failure Position

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Valve Failure Position is a safety precaution in the event of instrument air or electrical power failure that protects the process in emergency situations, or leave the system in a safe operating state. There are a few different fail scenarios; each having its own consequences and safety effects: Valve Fail Closed (FC), Fail Open (FO), or Fail in the last position (FL).

Related Definitions in the Project: The Operation and Maintenance 

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