Which of the following statements about pressure relief valves is true?

Pressure relief valves play a crucial role in maintaining safety in pressurized systems. Their primary function is to automatically release excess pressure that exceeds a predetermined limit, preventing potential equipment failure, explosion, or other hazardous situations. In scenarios where pressure can build up unexpectedly, such as in boilers or other pressurized vessels, these valves serve as a safety mechanism, ensuring that the pressure within the system remains within safe operating conditions.

By releasing pressure, they help to protect both the machinery and the personnel working with or around these systems, making them essential components in industrial, commercial, and many residential applications beyond just heating. Regular inspections and maintenance of pressure relief valves are also necessary to ensure they function correctly when needed, underscoring their importance in safety protocols.