Greenhill, G. (George), Sir, 1847-1927 · London and New York, Macmillan and Co. · leaf 24
hrust of thefluid on it is half the pull of the spring. THE SAFETY VALVE. 13 Where the pressure of a fluid is exerted over a circulararea or piston, it is often convenient to estimate thepressure in pounds per circular inch, written as Ib/O in,or Ib/O; and many pressure gauges attached to… … Fig. 2. Fig. 3. Fig. 4. It is important in steam boilers that the area of escapefrom the safety valve should be suflBciently large, so asto allow the steam to escape as fast as it is generated;according to a rule given by Rankine the area of thevalve in in^ should be 0006 times the number of lb…
Hydrostatics
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