What device controls the operating range of a steam boiler?

The device that controls the operating range of a steam boiler is the pressure control. This component is crucial for ensuring that the boiler operates within safe and efficient pressure limits. The pressure control system continuously monitors the boiler's pressure and adjusts the fuel supply or the water feed to maintain the desired pressure range. If the pressure exceeds predetermined limits, the pressure control can initiate safety mechanisms to prevent over-pressurization, thus protecting the integrity of the boiler system.

While other devices like safety valves, flow meters, and temperature gauges play important roles in boiler operation and safety, they serve different functions. The safety valve is designed to release excess pressure to prevent catastrophic failure but does not actively control the pressure within the operating range. Flow meters measure the flow of water or steam and are important for monitoring system performance, but they do not regulate pressure. Temperature gauges provide essential information on the temperature of the steam or water but again do not have a direct role in controlling the operating pressure of the boiler. Therefore, pressure control is the key device for managing the operating range of a steam boiler effectively.