. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . slide valve instantly admits is understood, or rather, after the opera-tion is thoroughly understood, the defectsthe valve is liable to develop arc veryreadily traced. Past issues contain a very complete de-scription of the universal valve for steamroad service, and we wish to first explainthe duties of the various portions of theLI. E No. 12 valve, then add a list of theprincipal disorders that are liable to de-velop from wear or neglect of the parts. In the first place there is but one size
. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . slide valve instantly admits is understood, or rather, after the opera-tion is thoroughly understood, the defectsthe valve is liable to develop arc veryreadily traced. Past issues contain a very complete de-scription of the universal valve for steamroad service, and we wish to first explainthe duties of the various portions of theLI. E No. 12 valve, then add a list of theprincipal disorders that are liable to de-velop from wear or neglect of the parts. In the first place there is but one sizeof universal valve for any size of cylinderor weight of car, hence the rate of in-crease in brake cylinder pressure duringan application of the brake or the time ofexhaust of the cylinder pressure during arelease of the brake is governed by chokedpassages in the pipe bracket which is afixture on the car, and the sizes of theopenings correspond to the size of brakecylinder that is employed. The auxiliary reservoir for all equip-ments is 10 x 33; the size of the service M-18 BRAKE VALVEHON OPERATIVE. TO HOSE CONNECTIONS. pressure from the main reservoir flowsthrough suitable ports in the brake valveto the straight air application and re-lease pipe, then through a cavity in theemergency slide valve to the chamber Bin the equalizing portion of the emergencyvalve. This moves the equalizing pistonto the right, the exhaust valve closing thebrake cylinder exhaust port and the equal-izing piston unseats the check valve 17,admitting main reservoir pressure to thebrake cylinder to a pressure equal to thatadmitted to the chamber B. Pressure in the application and releasepipe remaining constant, it follows that,as with the locomotive distributing valve,any loss in brake cylinder pressure wouldpermit the equalizing valve to open thecheck valve and supply the brake cylinderleak. Thus by admitting compressed airto the straight air application and releasepipe, brake cylinder pressure is obtaine
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectrailroa, bookyear1901
