International Correspondence Schools · Scranton, Pa. : The Colliery engineer co. · leaf 446
argedthrough the overflew nozzle O. The method of operation is as follows: The valve B isfirst opened by turning the wheel W; the primer valve R isthen opened by the handle y, thus permitting steam to flowthrough the passage E and a connection, not shown in thefigure, to the nozzle ?{. From u the… … ^^^^^j^yy^Mx^jmrnt y ■ffTm-^- To Boiler Fig. 203. which O is connected, thus forming a partial vacuum inthe space above L; the air in the passages D, C, G, //, K,T, and in the water pipe connected at P is thus drawn outthrough the valve L, and a partial vacuum is formed, whichpermits the pressure…
Railroad engineering
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