The soot-blower control valve solution

This paper reports on steam soot-blower control valves for fossil-fueled power plants which operate in a uniquely severe service and environment. They must not only frequently modulate flow over a wide range but must also maintain downstream pressure between very close limits at high differential. In addition, they also must function as block valves with tight shutoff every time they close to prevent soot-blower header pressure safety relief valve operation due to system overpressure. Satisfactory operation in these two separate functions is a problem often found in the power industry.