What does the presence of excessive pressure indicate when working with isolation valves?

The presence of excessive pressure when working with isolation valves is a significant indicator that the isolation valve may be damaged. When a valve is functioning properly, it regulates the flow and pressure within the system. If it is damaged, it may not be able to maintain the expected pressure levels, potentially causing excessive pressure to build up upstream of the valve. This situation could lead to leaks or failures within the system.

Understanding this key indicator is essential for proper maintenance and troubleshooting; thus, recognizing that excessive pressure points to a potential fault in the isolation valve can help technicians take appropriate actions to avoid more serious system issues.