Steam engines, prepared in the Extension division of the University of Wisconsin (1919)
Shealy, Edward Marvin · New York, McGraw-Hill · leaf 184
which slides over the ports, and on the back of which is ashort hollow cylinder. The cylindrical parts telescope and theinner one is provided with packipg rings to prevent leakage of thesteam from the inside to the outside of the valve. Steam is admitted to the inside of the valve and the… … ^^^^^^^ Fig. 105. engines. This type of engine requires a balanced valve becausethe governor is attached directly to the valve and governs thespeed by changing the position of the valve. If a large amount ofpower is required to move the valve a sensitive governor cannotbe used with it. Piston…
Steam-engines
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