. Railway age . •Ier cent. The boiler has, except for the superheating anangemenl, nofeature of special Interest. The upper part of the boiler barrel is fitted with three rows oflarge .snioketul)rs of 4% in. inside diameter, this being reduced to1 In. near the firebox. Inserted In each of these smoke-lubes Is asuperheating unit, consisting of two sets of pipes, 1V,„ In. In diam-eter and /,. In. thick, bent in the form of an U and connected Arrangement of Superheater Dampers. at the smoke-box end to a header, thus forming a continuous double-looped tube. The steam has to pass back and forth thr
. Railway age . •Ier cent. The boiler has, except for the superheating anangemenl, nofeature of special Interest. The upper part of the boiler barrel is fitted with three rows oflarge .snioketul)rs of 4% in. inside diameter, this being reduced to1 In. near the firebox. Inserted In each of these smoke-lubes Is asuperheating unit, consisting of two sets of pipes, 1V,„ In. In diam-eter and /,. In. thick, bent in the form of an U and connected Arrangement of Superheater Dampers. at the smoke-box end to a header, thus forming a continuous double-looped tube. The steam has to pass back and forth through eachunit. The double looping of the superheater pipes has the ad-vantage of increasing the velocity of the steam through the tul) the result that the temperature of the lubes is lowered, andtheir life correspondingly increased. The open ends of each unitIn the smokebox are expanded into a common flange, which Is in-. Tank Uocomotive for Freight Service, yi(ith Schmidt Smoke-Tulj« Superheaters; Prussian State Railroads. Apbil iO, 190§. THE RAILROAD GAZETTE. S13 dependently secured to the face of the steam collector by a single close when the regulator is shut; but as soon as steam is turned stud. The stud is centered in the flange and thus makes, with two on they are opened simultaneously by a piston working in a small copper-asbestos rings, an even joint all round. steam cylinder which is connected with the valve chest by a small Most other railroads prefer a different method of arranging steam pipe. If desired, the superheater dampers can also be worked by hand from the footplate, so that any de-Posifion /. /fefftz/crror S/tuf^ufomofic C!//ine/er lyiM-out sfeam. Dampers cfosedby counfertre/ff/rt
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Keywords: ., bookcentury1800, bookdecade1870, bookidrailwayage44, bookyear1870
