How does the safety valve setting on the steam and water drum compare to that of a superheater safety valve?

The safety valve setting on the steam and water drum is higher than that of a superheater safety valve due to the different operating pressures and safety requirements of these components.

The steam and water drum is primarily responsible for maintaining a stable pressure and volume of steam and water used in the boiler system. It operates at higher pressure levels since it has to account for the entire steam generation process and the pressure exerted by the boiler.

On the other hand, the superheater is designed to further heat the steam produced by the boiler to increase efficiency and energy output. It typically operates at lower pressures than the boiler itself because it is after the point of steam generation, allowing for the management of potential issues in the superheated steam phase without unnecessary risk to the boiler.

By having a higher safety valve setting on the steam and water drum, it ensures that the system can handle the operational pressures without exceeding safety thresholds, thereby providing the necessary safety mechanisms for the overall integrity and performance of the boiler and associated systems.