Boilers
Boilers
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In our eReader you can find the full English version of the book. Read Boilers Online - link to read the book on full screen. Our eReader also allows you to upload and read Pdf, Txt, ePub and fb2 books. In the Mini eReder on the page below you can quickly view all pages of the book - Read Book Boilers
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1 pounds.
How much load would have to be put upon the same valve to allow it to blow off at 75 pounds per square inch?
If the pressure exerts 75 pounds on one square inch, it would exert on the 7.0686 square inches of the valve which is exposed to it : THE SAFETY VALVE 75 X 7.0686 = 530 pounds, 83 which must be the combined weight of the valve and the weights with which it is loaded.
Fig. 56 does not show a practicable valve, but is sufficient to illustrate the point that the force tending Fig.... 56.
to lift the valve must equal that holding it to its seat (in this case the dead weight of the valve itself and the weights with which it is loaded), and that this upwardly acting force is the area of the valve in square inches, multiplied by the pressure per square inch. Such a dead-weight valve is ponderous and impracticable 84 BOILERS and the usual practice is to use a lighter weight, increas- ing its effect by leverage, or to hold the valve to its seat with a spring.
The Principle of the Lever Suppose a strip of board balanced over a sharp edge as in Fig.
What to read after Boilers?
You can find similar books in the "Read Also" column, or choose other free books by Collins Hubert Edwin to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
1 pounds.
How much load would have to be put upon the same valve to allow it to blow off at 75 pounds per square inch?
If the pressure exerts 75 pounds on one square inch, it would exert on the 7.0686 square inches of the valve which is exposed to it : THE SAFETY VALVE 75 X 7.0686 = 530 pounds, 83 which must be the combined weight of the valve and the weights with which it is loaded.
Fig. 56 does not show a practicable valve, but is sufficient to illustrate the point that the force tending Fig.... 56.
to lift the valve must equal that holding it to its seat (in this case the dead weight of the valve itself and the weights with which it is loaded), and that this upwardly acting force is the area of the valve in square inches, multiplied by the pressure per square inch. Such a dead-weight valve is ponderous and impracticable 84 BOILERS and the usual practice is to use a lighter weight, increas- ing its effect by leverage, or to hold the valve to its seat with a spring.
The Principle of the Lever Suppose a strip of board balanced over a sharp edge as in Fig.
What to read after Boilers?
You can find similar books in the "Read Also" column, or choose other free books by Collins Hubert Edwin to read onlineMoreLess
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