. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . in the train-pine, and inthe auxiliary reservoir. If the triplevalve is sufficiently sensitive, its pistonand slide valve will be forced to releaseposition without the weighted valve be-ing lifted, when the pressure in the train-pipe is slowly increased. A triple valve leaving the shop shouldreceive the following tests aside from thegeneral examination to condemn thegraduating spring, emergency-valve rub-ber seat, check-valve spring, gaskets,strainer, etc.: Test No. I—Examination of fit otpac
. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . in the train-pine, and inthe auxiliary reservoir. If the triplevalve is sufficiently sensitive, its pistonand slide valve will be forced to releaseposition without the weighted valve be-ing lifted, when the pressure in the train-pipe is slowly increased. A triple valve leaving the shop shouldreceive the following tests aside from thegeneral examination to condemn thegraduating spring, emergency-valve rub-ber seat, check-valve spring, gaskets,strainer, etc.: Test No. I—Examination of fit otpacking ring. Test No. 2—For packing-ring leakage. Test No. 3—Feed-groove test. Test No. 4—For release. of high-grade oil. are NO. all cocks closed excepting F andH. turn screw / to its extreme inwardposition; then close cock F and open cockB very slowly to avoid forcing the triplepiston back with sufficient force to bendits stem when it strikes screw /, whichscrew is supposed to hold the triple pis-ton midway between the service andgraduating positions. The maintenance. 5HOP TEST R.\CK FOR REP.\IRED TRIPLES—TOP VIEW. The weight to be used with each valveshould never be other than as indicatedon the weights themselves. The B-25 is the old 3-in. plain freighttriple valve; F-2/. the Passenger triple;F-36, the Freight; G-^4, the new-styletriple for tenders, known as the Modi-fied; F-^s, the Driver Brake; F-46, Test No. 5—For tightness of slide,emergency, and check valves, and generalfreedom from leaks of castings or gas-kets. TEST NO. I. The triple-piston packing ring must befxamincd and known to be fitted so thatthe ends come neatly together when in of 80 pounds pressure in the train-pipeshould not result in leakage by the pistonsufficient to give more than 15 poundspressure in reservoir M in one this test is completed, close cockB, open cock F, bleed the air from reser-voir M, and turn screw / to its outerposition. 440 RAILWAY AND LOCOM
Size: 2989px × 836px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, booksubjectrailroa, bookyear1901
