. The Street railway journal . ine, nocheck valve was placed in the supply necessitates starting the dry vacuumpump first and pulling water into the systembefore the rotary pump will operate. Thiscauses considerable delay, and it may eventu-ally be deemed advisable to put in a checkvalve. The circulating pump, Fig. 14, which is lo-cated in the basement, is of the centrifugaltype, and is direct connected to a 9-in. x engine provided with a fly-ball gov-ernor. The pump has a 10-in. discharge anda 12-in. suction pipe, which divides to enterthe pump qn each side of the volu
. The Street railway journal . ine, nocheck valve was placed in the supply necessitates starting the dry vacuumpump first and pulling water into the systembefore the rotary pump will operate. Thiscauses considerable delay, and it may eventu-ally be deemed advisable to put in a checkvalve. The circulating pump, Fig. 14, which is lo-cated in the basement, is of the centrifugaltype, and is direct connected to a 9-in. x engine provided with a fly-ball gov-ernor. The pump has a 10-in. discharge anda 12-in. suction pipe, which divides to enterthe pump qn each side of the volute. Thetop of the volute is provided with the neces-sary connections for priming. The pump isbuilt to work satisfactorily with a suction of 20 ft. anda discharge head of 15 ft. In its present location, thecenter line of the intake is ft. above the low-water mark of the river, which is ft. above the sealevel. A large duplex pump, located in the basement nearthe centrifugal pump, supplies the necessary make-up FIG. 10.—GENERAL VIEW OF OPERATING ROOM, SHOWING TURBINE AND CONDENSER a deep hole, into which the intake pipe is laid. The intake anddischarge pipes, which are 30 ins. in diameter, run from thebottom of the hot and cold well and extend a distance of about30 ft. into the river. Considerable difficulty was experienced inlaying them. A coffer dam of the usual type was built out intothe river and excavation made. Several times, when the exca-vations were completed and the pipes were ready to be laid, This is pumped direct from the condenser discharge to thestorage tank. The same pump is used to empty the drainagesump in the basement. By closing and opening the propervalves, shown in Fig. 14, water is pumped from the sump intothe condenser discharge. Thus the pipe, which, in supplyingmake-up water, was the suction, becomes the discharge. Theexhaust from the several auxiliaries is lead to the heater in the February 4, 1905.] boiler room. A by-pass around th
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectstreetr, bookyear1884
