Hutton, Frederick Remsen, 1853- [from old catalog] · New York, J. Wiley & sons; [etc., etc.] · leaf 240
ght outside of both disks so as to beupwards upon the lower and downwards upon the upper.It will be apparent, therefore, that valves so constructed canbe made either perfectly balanced, underbalanced, or.over-balanced, according to the area and the direction of thepressure. They are most frequently… … Fig. 170. This means that the small base of the cone in the upper seatshall be just larger than the large base of the disk whichcloses the opening in the lower seat. Balanced lifting-valvesof this class open a comparatively large area for the passageof steam, and have no friction except that of the…
Mechanical engineering · Steam power plants
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