Which of the following is the correct remedy for a stuck valve?

• A. Clean or replace the valve.
• B. Lubricate the valve heavily.
• C. Ignore and continue operation.
• D. Tighten fittings to increase pressure.

Answer: (A)

When a valve is stuck, the primary fix is to remove the obstruction or replace the valve so it can move freely and seal properly. Debris, scale, corrosion, or damaged packing can bind the stem or seat, and forcing the valve can damage components or create leaks. Cleaning or replacing directly addresses the cause and restores reliable operation.

Lubricating heavily isn’t the solution in this case. It can push debris further into the mechanism, attract more dirt, contaminate the process, and mask a real problem, giving a false sense of movement without actually restoring proper sealing or control.

Ignoring the issue and continuing to operate risks a sudden valve failure, leaks, or unsafe flow conditions, which can lead to process upsets or equipment damage.

Tightening fittings to increase pressure won’t free a stuck valve and can damage seats, gaskets, and piping, making the problem worse and more hazardous.

Safety steps to take include isolating and depressurizing the line, draining if needed, following lockout/tagout procedures, and then inspecting, cleaning or replacing the valve as required. After repair, reassemble, test at low pressure, and ensure proper operation before returning to service.