. The street railway review . FIG. 12—SITB-ST.\TI().\. 15TH .\N1) WALNUT STS. shape to the main overflow pipe, forming thereby a water sealwhich, as soon as a continuous column of water is formed by theaction of the circulating pumps in filling pipes and condensers, thenacts as a siphon and cuts down the lift required to get water to valve used being set at by-pass when the vacuum system is work-ing so that the valve spindle is free to rise or fall. The 34-in. shut-oft valve in the vacuum line is operated t)y direct-current, 220-voltmotor geared to the spindle. This insures quick shutting of a
. The street railway review . FIG. 12—SITB-ST.\TI().\. 15TH .\N1) WALNUT STS. shape to the main overflow pipe, forming thereby a water sealwhich, as soon as a continuous column of water is formed by theaction of the circulating pumps in filling pipes and condensers, thenacts as a siphon and cuts down the lift required to get water to valve used being set at by-pass when the vacuum system is work-ing so that the valve spindle is free to rise or fall. The 34-in. shut-oft valve in the vacuum line is operated t)y direct-current, 220-voltmotor geared to the spindle. This insures quick shutting of a large. 1;— ■•](; y. .sii!-ST.\TioN. irni »t. .\.ni) (•;vki,.t) avio. the conrlcn«er outlet level. Both inlet and outlet pipes have valvesclose to the condensers, and on the outlet is an air valve for break-ing the liphon vacuum. The oil separators have Sorgc drainagetraps and tanks with chronometer steam valves. valve in case of emergency to prevent .steam lilling condenser andpipes under atmospheric pressure. All atmosplu-ric exhausts arecouneclrd to a 4K-in. steel riveted header ; in one exhausthead on the roof. 380 STREET RAILWAY REVIEW. [Vol. XIV. No. 6. Blakc vertical duplex bcini air pumps, size 14 x 38 x 31 in., lakecare of Ihc water of condensation. Tlie suction nozzle is severalfeet bclowthe condenser outlet and the pump overflow is severalfeet above Ihc floor, giving a sufficient head to carry the water o.
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Keywords: ., book, bookcentury1800, bookdecade1890, booksubjectstreetrailroads
