Identifier: textbookonlocomo02inte (find matches)
Title: A textbook on the locomotive and the air brake
Year: 1901 (1900s)
Authors: International Correspondence Schools
Subjects: Locomotives Locomotive boilers Locomotives Railroad cars
Publisher: Scranton, Pa., International textbook co
Contributing Library: Northeastern University, Snell Library
Digitizing Sponsor: Northeastern University, Snell Library

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ove should never bemore than half full; if filled up more than this, the heating willbe retarded instead of helped. The pipes should be filled with a strong solution of salt water,this having been found to be best for the purpose. Each sideshould be filled separately. Instructions for preparing thebrine and filling the system have already been given. CAR EQUIPMENT: HOT WATER. (System 2.) 50. Description.—Another method of hot-water heatingsometimes used is illustrated in Fig. 16. It is very similar tothe circulating system already illustrated in Fig. 15, differingtherefrom principally in having only a single supply valve andtrap, but having two expansion drums instead of one. Otherdifferences in the equipment will be evident from the figure. In this system, also, P is the train pipe and Fthe train-pipevalve, whence the steam passes through P until it reachesvalve V. There is in this case, as just remarked, only one valveFand also only one valve v, instead of two, as in Fig. 15. When
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§ 13 CAR HEATING. 39 the valve v is opened, steam passes into both the inner coils inthe heater S^ through the two pipes a, a. The water is heatedin both coils simultaneously, and the condensation goes downthe pipes d, d and is carried off through the pipe i to the trap T.The risers i2, R pass up to the sealed jets F, F, as in Fig. 15,but each pipe goes to its own expansion drum in this case,instead of both going to the one drum. From the sealed jetsrun the pipes p and p. In the illustration, the car is sup-posed to be broken in two places, and the end portions broughtclose together, thus enabling us to show the apparatus on alarger scale than we otherwise could in this space. The courseof the hot-water pipe p is readily traced; it runs to the end ofthe car and makes the return bends shown, and then comesback to its T piece t\ by which it enters the 2-inch coil at thebottom of the heater. The pipe p takes the course shown, turnsdownwards to the crossover b, and passes to the other si

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