What is the main function of a safety valve on a boiler?

The main function of a safety valve on a boiler is to prevent overpressure. A safety valve is a critical component designed to open automatically when the pressure inside the boiler exceeds a predetermined limit. This helps maintain the safe operation of the boiler by venting excess steam or gas, thus preventing catastrophic failures such as explosions or structural damage caused by excessive pressure buildup.

The safety valve is calibrated to ensure that pressure levels remain within safe operating limits, providing an essential safeguard for both the equipment and personnel operating the boiler. This functionality is crucial in maintaining the integrity and reliability of boiler systems in various applications.

Other options, while related to boiler operation, serve different specific functions. For instance, controlling water level is achieved through different devices, such as water level controllers. Regulating fuel supply typically involves valves and controls that manage the flow of fuel to the combustion chamber. Enhancing combustion may be influenced by air-to-fuel ratios and burner design, not directly by a safety valve. Thus, the designation of the safety valve is singularly focused on pressure regulation and safety.