Which component is essential for controlling the temperature of steam in a boiler?

The component that is essential for controlling the temperature of steam in a boiler is the thermostat. A thermostat functions as a temperature-sensitive device that regulates the temperature within the system by maintaining the desired setpoint. When the steam temperature rises above this setpoint, the thermostat can trigger mechanisms to reduce heat input, such as shutting down fuel supply or activating a cooling system. This helps in maintaining safe and efficient operations of the boiler, preventing overheating and potential system failures.

Heat exchangers, pressure gauges, and radiators, while important components in boiler systems, serve different purposes. Heat exchangers are primarily designed to transfer heat between two or more fluids, but they do not control the temperature directly. Pressure gauges measure the pressure of the steam, which is crucial for safe operation but does not directly regulate temperature. Radiators distribute heat within a building or space but do not play a role in the temperature regulation of the steam within the boiler itself.