Safety-Valves

angle of inclination AREA BETWEEN BASE area of opening area of valve ball Bevel of 30 Beveled valve boilers with natural calculation center of gravity clear of seat cubic inches depth of seat diameter of valve divide Example.-A experiment feet of grate forces act frustum fulcrum given lift given pressure given safety-valve grate surface horizontal distance inches in diameter less than depth lever arm lift is greater lift is less lift less lifting clear Multiply the square opening due opening in square parallel forces perpendicular point of application pounds of water pounds per square pressure of steam Professor Thurston's proportion rules second spring single force slant height spring balance square feet square foot square inch square inches-area required Square of lift Square of sine stationary and marine steam in pounds steam pressure Subtract tion valve in square valve is beveled valve will rise vertical line water evaporated Xcos