. The street railway review . s, it having been determined that under the conditions of feedwater and service at this plant, the longer life of the brass pipingwould more than offset the higher first cost. The boiler stop valves are of a new pattern recently developedby the New Bedford Boiler & Machine Co., of New Bedford, valve body is designed to avoid undue friction of steam, thearea of steam passage in the smallest part being 20 per cent greaterthan the area of the pipe. The metal in the seat and disk is a nickelbronze of high tensile strength made after a secret formula. The disk
. The street railway review . s, it having been determined that under the conditions of feedwater and service at this plant, the longer life of the brass pipingwould more than offset the higher first cost. The boiler stop valves are of a new pattern recently developedby the New Bedford Boiler & Machine Co., of New Bedford, valve body is designed to avoid undue friction of steam, thearea of steam passage in the smallest part being 20 per cent greaterthan the area of the pipe. The metal in the seat and disk is a nickelbronze of high tensile strength made after a secret formula. The disk although loose, is secured to the stem by a sleeve thatis screwed into the disk. The guide stem on the disk is providedwith a square for convenience in disconnecting the .sleeve. Thesleeve forms a steam tight join with the bonnet when the valve iswide open allowing the stuffing box to be repacked. In placing flanges on the pipes, the piping was brought clearthrough the flange, and then peened on the inside and faced in a. densers is cast iron bell and spigot pipe, and it is carried under theground in a bed of portland cement, so that in case the pipe doesdeteriorate from the action of the salt water, a cement conduit willbe left to carry the overflow. The stack is of brick, with iron coping on top, put together withbrass rods. The height is 151 ft. and the diameter of flue at baseis 7 ft. Fuel Economizer. For utilizing the heat of the waste flue gases the New Bedfordstation is equipped with Green fuel economizers, supplied by theGreen Fuel Economizer Co., of Matteawan, N. Y. The apparatuscontains 4,720 sq. ft. of heating surface. It is erected on structuraliron work at the side of the new boilers, with a by-pass flue under-neath by which when necessary the gases may be passed direct tothe stack without going through the economizer. The economizertubes are fitted with the new Green triple bevel edge scrapers for Dec. is, 1901.] STREET RAILWAY REVIEW. 887 preventing accumulation
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