. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . 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 LOCOMOTIVE ENGINEERING Octubor, 1902. TEST NO. 3. With the triple piston in i-elease posi-tion, no air in the auxiliary reservoir, and80 pounds in tlie Irainpipe, the auxiliaryshould charge from o to 70 pounds, usingan F-s6 triple, in from 60 to 85 seconds:an F-2/, in from 28 to 45 seconds; and anF-29, in from 16 to 25 seconds. To make test, close
. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . 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 LOCOMOTIVE ENGINEERING Octubor, 1902. TEST NO. 3. With the triple piston in i-elease posi-tion, no air in the auxiliary reservoir, and80 pounds in tlie Irainpipe, the auxiliaryshould charge from o to 70 pounds, usingan F-s6 triple, in from 60 to 85 seconds:an F-2/, in from 28 to 45 seconds; and anF-29, in from 16 to 25 seconds. To make test, close all cocks exceptingF and H: opening cock F will exhaustall air from the train-pipe side of thetriple piston; then close cock /•, opencock 6, and note the number of secondsnecessary to charge reservoir M to 70pounds. When fully charged, coat theexhaust port with soapsuds to be surethat no leakage exists when the slidevalve is in release position. TEST NO. all cocks open excepting E. Aand F (Fig. i). permit reservoir M to be sure to release properly if placed at theend of a long air ^l■(: CniU-V i (:i::^S^Jm^ ] TRIPLE VALVE TESTING —END VIEW. charged to a pressure of 70 pounds; nextclose cock B, and, by means of cock A,slowly reduce the pressure, as shown bythe train-pipe gauge hand, until it regis-ters 60 pounds, at which time cock Ashould be gradually closed; coat the ex-haust port with soapsuds to be sure theslide valve is tight in service position;now close cock H, and open cock E; un-der the conditions now existing the triplevalve should release the air from brakecylinder 0 without valve K being liftedfrom its seat; if this valve should beforced from its seat, the movement de-notes that the triple valve is not suffi-ciently sensitive, and the defect should*be remedied. The rise in train-pipe pres-sure is retarded by controlling vale any valve passing this test will be TEST NO. tightness of the slide valve in CORRESPONDENCE. A Hand
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectrailroa, bookyear1901
