What device is used to control steam pressure in a vapor boiler?

The device used to control steam pressure in a vapor boiler is the vapor stat. A vapor stat is a specialized type of pressure controller that regulates the steam pressure according to the set parameters. It continuously monitors the pressure within the boiler system and activates or deactivates burners or valves to maintain the desired pressure levels, ensuring safe and efficient operation of the boiler.

In contrast, a vapor regulator typically serves a different function in managing the flow of vapor rather than directly controlling the pressure. A vapor control panel may provide monitoring and settings for various systems but does not directly adjust steam pressure by itself. A steam gauge is primarily a measurement tool that indicates the pressure within the steam system but does not perform the regulating function required for maintaining specific pressure levels. Therefore, the vapor stat is the appropriate device for accurately controlling steam pressure in a vapor boiler.