pumps turned into a circulating pump , the requisite valves being placed so as to be opened at the shortest notice . To provide against any accident to the surface System , a plain injection valve is placed on the condenser , and a valve is also fitted at some convenient part to drain all the water… … from the steam piston , while the Fig . 313 . — Vertical Arrangement of Tubes for Return Connecting - rod Engines . circulating pump occupies the a , Tube chamber . B , Air pump , C , Circulating same position as regards the pump . other cylinder ; the water is drawn through the vessel containing…
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