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Valves - Fail-Last (FL)

A control valve that should stay put if control signal or air fails.

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A control valve which should stay put on the position on control signal failure should be labeled

  • FL - Fail-Last

The control signal may be pneumatic, hydraulic or electric.

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Related Topics

Control Valves

Control Valve terminology, bodies, trim, flow characteristics, Cv and Kv sizing, noise, actuators and positioners

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