Which type of boiler has its burner located above the water line?

A high-pressure steam boiler is designed with its burner located above the water line to ensure efficient combustion and proper steam generation. This configuration allows for optimal control of the flame and heat transfer, as the burner can effectively deliver heat to the water in the boiler.

Having the burner positioned above the water line is particularly beneficial for safety and performance in high-pressure applications, as it helps to reduce the risk of blowback and ensures that steam is generated efficiently. This setup also facilitates better access for maintenance and inspection of the burner system.

In contrast, other types of boilers may have different burner configurations depending on their design and operational requirements. For example, fire-tube boilers typically have their burners below the water line, which changes the dynamics of heat transfer and steam generation. Understanding these differences helps in selecting the appropriate boiler type for specific applications.