What device, besides a safety valve, is mandatory on every automatically fired steam boiler?

The requirement for a low water fuel cut off device on every automatically fired steam boiler is crucial for safety and operational integrity. This device is designed to monitor the water level within the boiler. If the water level drops below a safe threshold, the low water fuel cut off automatically shuts off the fuel supply to the burner. This action helps prevent dry firing, which can result in serious damage to the boiler and create hazardous conditions.

Maintaining an adequate water level is essential for the safe operation of steam boilers since it ensures proper heat transfer and steam production. Without this mechanism in place, the risk of overheating and possible boiler explosions increases significantly, making it a critical component in steam boiler safety systems.

While other devices, such as pressure gauges and temperature sensors, are important for monitoring the boiler's conditions, they do not fulfill the specific role of protecting against low water levels, which the low water fuel cut off directly addresses. Therefore, it is mandated to ensure safe operation in automatically fired steam boilers.