Thank you Rmw for a detailed explanation. Even though, the minor vacuum may not be strong enough to seriously damage the structural parts in the boiler , some sources say that it will also prevent sensitive critcal components such as the , modulating controller and pressure gage from damage...
I am a boiler operator. I currently operate 2 high pressure Cleaver Brooks 100 horsepower boilers. Recently, I had to shutdown one boiler due to a rupture on the feedwater supply line. The boiler I shutdown was the lagging boiler so it already had the main steam stop valve closed. Our normal...