What does a spring-loaded pop safety valve do?

A spring-loaded pop safety valve is designed specifically to safeguard boiler systems by releasing excess pressure that may build up within the system. When the pressure exceeds a predetermined limit, the valve automatically opens due to the force of the spring being overcome by the internal pressure. This action allows steam or gases to escape, thereby reducing the pressure back to a safe level and preventing potential equipment failure or catastrophic incidents. The valve is a critical component in maintaining safe operating conditions within a boiler, ensuring that pressure does not rise to dangerous levels during operation.

In contrast, other functions mentioned, such as controlling air intake, regulating water levels, or preventing fuel ignition, pertain to different mechanisms and components within a boiler system, but do not describe the primary function of a spring-loaded pop safety valve.