Ripper, William, 1853-1937 · London, New York [etc.] : Longmans, Green and co. · leaf 339
in. larger at one end than at the other,to facilitate putting in and fixing of the barrel. y 322 STEAM-ENGINE THEORY AND TRACT ICE. The valve seats and valves are cast off a specially strong hard mixtureof cold-blast and hematite irons. The upper and lower beats of valve faces are tangents to two… … Fig. 375. seats are both the same angle, the lower valve seat wears larger thanthe valve and causes leakage. It is usual to finally grind the valve seats together when theyhave been heated, so as to make them steam-tight after they havebeen expanded by the hot steam. All castings have more or…
Steam-engines
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