What is Fail Open, Fail Closed and Fail Lock in Control Valve Failure Mode

Опубликовано: 18 Февраль 2026
на канале: HardHat Engineer

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Understanding Fail-Open, Fail-Closed, and Fail-Lock Control Valves
In this video, you will learn about the different failure modes in control valves—Fail-Open, Fail-Closed, and Fail-Lock. I will explain how each mode operates and where they are typically used. This knowledge is essential for maintaining process safety and efficiency in your plant. By the end of this video, you'll have a clear understanding of these three failure modes, how they work, and where they are used.

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00:00 Introduction to Control Valve Failure Modes
00:41 Components and Operation of Control Valves
01:29 Fail-Open Mode Explained
02:21 Fail-Close Mode Explained
03:42 Fail-Lock Mode Explained
04:23 How it is shown in P&ID
04:53 Conclusion and Further Learning