A textbook on the locomotive and the air brake (1901) (14758617662)

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



Text Appearing Before Image:
of the steamis much the same as before; it is taken from the train pipe P,passes through pipes P, P to either side of the car, the pipesafter rising through the floor receiving the supply valves v, v.After completing the circuit of the car, the two halves ofthe lower length of radiating piping come together, formingthe loop L) from this loop a short pipe j leads down to thetrap r, from whence the condensation escapes, instead of bythe drain valve u used in Fig. 22. However, a blow-off valve uis attached to the high (the non-outlet) end of the trap; thisvalve provides for a quick discharge, if required. In most equip-ments—particularly for cold climates—these valves are furnishedwith extension handles reaching from the valve wheel to thecar floor. They can thereby be operated from inside the cars.This is found to be very convenient; for both when desiring toheat up a car quickly and also to drain the pipes quickly whensteam if shut off, it is found an advantage to open this valve,
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S13 CAR HEATING. 53 which, by the way, is identical with that used as a drain valvein Fig. 22. The trap T is set with a fall of two inches, its out-let end being lowest. When steam has been turned into thecar for testing, the trap may be adjusted, slacking back the lock-nut at the outlet end of the trap and then screwing the shankupwards. Do this until steam escapes freely and then close itagain until nothing but water escapes. Then screw up the nuttight, taking care that the shank does not shift during the opera-tion. After the trap has been thus adjusted, it wall workautomatically. By the use of trap T the removal of the condensed wateris rendered automatic and independent of any attention fromthe trainmen. OPERATING THE SYSTEM. 65. Heating a Cold Train.—First, couple up all thesteam hose and then open wide all the train-pipe valves. Turnon steam and blow out all condensation from the train pipe.The amount of steam generally should not exceed 40 poundsin the case of a train contai