Locomotive boiler construction; a practical treatise for boilermakers, boiler users and inspectors .. . Figure 225 Figure 226The Derry Collard Co. Steam pipe connections. as is also the nozzle N. It is the exhaust steam thatcreates draft in the boiler and the size of this nozzle de-termines the speed that the steam rushes out. For thisreason several sized nozzles are sometimes furnished soas to meet the varied conditions of full load, speed, pipe is planed off on the bottom and is bolted on to 243 Exhaust nozzles. the cylinder. Sometimes a central rib divides the twosides of the exhaus
Locomotive boiler construction; a practical treatise for boilermakers, boiler users and inspectors .. . Figure 225 Figure 226The Derry Collard Co. Steam pipe connections. as is also the nozzle N. It is the exhaust steam thatcreates draft in the boiler and the size of this nozzle de-termines the speed that the steam rushes out. For thisreason several sized nozzles are sometimes furnished soas to meet the varied conditions of full load, speed, pipe is planed off on the bottom and is bolted on to 243 Exhaust nozzles. the cylinder. Sometimes a central rib divides the twosides of the exhaust and extends up very near the topbut more frequently both sides of the exhaust enter di-rectly into a plain exhaust pipe. As it is necessary to have dry steam for the main cyl-. The Derry Oollard Co. Figure 227Common form of exhaust nozzle. inder so it is also necessary to have dry steam for injec-tors, air pump, etc. Fig. 228 shows the general arrange-ment of the dry pipe for this purpose. It will be seen thatit takes its steam from the high part of the dome and thenpasses out of the boiler through a ball joint connection D. 244
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