Safety-valves |
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angle of inclination AREA BETWEEN BASE area of opening area of valve ball Bevel of 30 Beveled valve calculation center of gravity cloth cosine cubic inches depth of seat diameter of valve divide draw Engineer Example.-A experiment foot of grate forces act frustum fulcrum given lift given pressure given safety-valve grate surface horizontal distance Hypsometry Iron less than depth lever arm lift is greater lift less lifting clear Locked Multiply the square natural draft opening due opening in square orifice parallel forces perpendicular point of application pounds of water pounds per square pressure of steam 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 telegraphy tion Treatise U. S. Navy valve in square valve is beveled vertical line water evaporated
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Page 14 - The area of the valve in square inches, the weight of the valve, spindle and lever in pounds, the position of the center of gravity of the lever, and the distance from the center of the valve to the fulcrum, must be known, as in the first example.