. American engineer and railroad journal . nd injectors and a third connection suit-able for a pipe or hose coupling which is used for filling orblowing off the boiler. Throttle, Steam and Exhaust Pipes. The throttle valve is located on the top of the boiler outsideand consists of an iron casting having two S in. steam pipe con-nections, one on either side; the joint to the boiler is made bya brass ball ring having an opening 12-54 in- in diameter. Thethrottle casting extends down through this and connects to acast iron dry pipe which takes steam from a dome set furtherforward on the same cour
. American engineer and railroad journal . nd injectors and a third connection suit-able for a pipe or hose coupling which is used for filling orblowing off the boiler. Throttle, Steam and Exhaust Pipes. The throttle valve is located on the top of the boiler outsideand consists of an iron casting having two S in. steam pipe con-nections, one on either side; the joint to the boiler is made bya brass ball ring having an opening 12-54 in- in diameter. Thethrottle casting extends down through this and connects to acast iron dry pipe which takes steam from a dome set furtherforward on the same course; the arrangement of this is shownclearly on the boiler drawing. Fig. 2. Outside steam pipes lead from the throttle to the saturatedheader of the superheater, and steam, after passing through it,goes directly to the high pressure cylinders, also through out-side pipes which are heavily lagged to prevent condensation, asare also the pipes from the throttle. This portion of the piping 81 (March) 82 A^IERICAN EXGINEER AND RAILROAD is, of course, all high pressure, but no special importance attachesto it, as there is no movement in the pipes, the high pressureengine being attached rigidly to the boiler. There is, therefore,no chance of leakage if the joints are properly made. The steam exhausts from both high pressure cylinders intoa common header, or receiver, bolted over the ends of the steamchests, and this header connects by a 7 in. pipe to a similar oneon the low pressure cylinders, which connection, however, mustbe flexible as the movement of the front truck begins to affectthe piping at this point. To minimize its efiect, the connectionhas been placed directly over the pivot point of the front receiver pipe between the two headers extends upward aboutsix feet. This was done to give sufficient volume, and this pipedown to the point where it enters the low pressure header isbraced solidly to the boiler and the connection which bolts tothe low pressure ste
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectrailroadengineering
