What occurs when the valve disc in a safety valve is worn?

When the valve disc in a safety valve is worn, it can lead to a condition known as "weeping." This refers to a situation where the valve does not fully close, allowing a small amount of fluid or gas to escape or leak through the valve even when it is supposed to be sealed.

This occurs because the wear on the disc can prevent it from making a proper seal against the valve seat. When the seating surface is compromised, the pressure can allow some flow past the disc, resulting in a continual leak.

Understanding the condition of a safety valve and the implications of a worn disc is crucial in maintaining system integrity and safety. A weeping valve indicates that there may be a loss of containment which could lead to hazardous situations if not addressed promptly through maintenance or replacement.