What is a common safety feature found in boiler systems?

A low water cutoff device serves as a critical safety feature in boiler systems by detecting the water level within the boiler. It ensures that the water does not drop below a certain level, which is essential for the safe operation of the boiler. If the water level falls too low, the device automatically shuts down the burner, preventing overheating and potential damage to the boiler components. This feature is vital because operating a boiler without sufficient water can lead to a dangerous situation known as dry firing, which can result in boiler failure or even explosions.

The other options, while important components of boiler systems, are not as universally recognized as essential safety devices. For instance, a pressure relief valve is primarily designed to release excess pressure and is more about preventing overpressure conditions. Steam traps are utilized to efficiently manage steam and condensate but are not directly related to safety in terms of low water situations. Flame safeguard controls monitor the presence of a flame during combustion but do not directly address the water level issues that can lead to hazardous conditions.