What does the term "safety interlock" refer to in the context of boiler operation?

The term "safety interlock" in the context of boiler operation specifically refers to a mechanism that ensures the boiler cannot operate under unsafe conditions. This device is designed to prevent the initiation of the boiler's operation unless certain criteria are met, such as the correct pressure levels, proper water levels, and safe operational temperatures. By requiring specific conditions to be satisfied before the boiler can begin functioning, the safety interlock plays a crucial role in maintaining safe operational practices. This safety measure helps to protect both the equipment and the personnel working with or around the boiler, significantly reducing the risk of accidents, explosions, or malfunctions. Therefore, its primary purpose is not to enhance performance, measure pressure, or control fuel efficiency but to ensure operational safety.