Ripper, William, 1853-1937 · London, New York [etc.] : Longmans, Green and co. · leaf 80
Fig. 56. The Piston Slide-valve is a form of slide-valve which is used forhigh-pressure steam, to avoid the loss due to the friction of theordinary flat valve. The piston-valve as in perfect equilibrium as … regards the steam pressure, and is much used for the high-pressurecylinder of triple-expansion engines. H STEAM-ENGINE THEORY AND PRACTICE. It is not used for the lower-pressure cylinders, because the dimen-sions of the valve to give the required port-opening is large relativelyto the dimensions of…
Steam-engines
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