What is the primary function of a safety valve?

The primary function of a safety valve is to pop open when pressure exceeds a certain limit. Safety valves are critical safety devices designed to prevent excessive pressure buildup in a steam system, such as a boiler. When the internal pressure rises above a predetermined level, the safety valve automatically opens to release steam, thereby preventing potential explosions or structural failure of the boiler. This release of steam minimizes the risk of catastrophic incidents, ensuring that the system operates safely within its designed pressure parameters.

Understanding this function highlights the importance of proper maintenance and regular testing of safety valves to ensure they are responsive and effective in protecting the system from pressure-related hazards. The other choices, while related to steam systems, do not align with the core purpose of a safety valve in this context.