The industries of the world; a complete course of technical education for the manufacturer, operative, and all persons engaged or interested in trade and commerce (1881)
Wylde, James · London, New York, The London Printing and Publishing Company, limited · leaf 463
used for stationary engines. A is a box fixed over a hole B in the upper varying from 20 lbs. to 50 lbs. per square inch surface of the boiler, having a truly-faced seat¬ above atmospheric pressure. We will suppose that the weight of the valve and stem is 5 lbs., ing on which the valve C can rest.… … Fig. 269. — Water-gauges for Steam-Boiler. the escape of steam round the stem. A pipe D end is 30 inches, the lever itself being of uniform conducts the steam that passes the valve, when depth and thickness, and weighing 9 lbs. it is lifted, to the chimney or elsewhere. The The area of the valve (a…
Industrial arts · Technology
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