... exhausted from the fi rst cylinder and permitted to enter the second cylinder, where it is fur-ther expanded, and so on for the number of cylinders used. Higher thermal effi ciencies are achieved, ... Either sludge, scale or both may be formed from substances or minerals carried in suspension or dissolved in the feedwater. Scale can generally be considered as made up of calcium sulfate, calcium ... stationary. Here the steam is again redirected, this time impinging upon another movable set of blades, with more of the energy utilized. This process is continued until the resultant pressure...