Practical stationary engineering : in form of questions and answers (1909)
West, Andrew Cassius, 1855- · Boston, Mass. : A.C. West · leaf 144
131 … 132 PRACTICAL STATIONARY ENGINEERING Why do you give a valve lap? Giving a valve lap is intended merely that we may keepthe port closed until the engine is on the centre. The lap onvalve is the amount it overlaps the port when the valve is inmid-throw. Lap does not apply to the amount that valve…
Steam engineering · Steam-engines · Steam-boilers
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