Ingegnere canadese . ltimate laborato-zione che questa stazione potrebbe mai essere chiamati a takecare e del necessario le pompe sono state installate in duplicato,in modo che la stazione potrebbe non essere mai arrestare, in unità caseone necessaria revisione. La stazione essendo piccolo andisolated, per quanto riguarda la città di simili apparecchiature sono interessati, theplant è stato progettato per (i) automaticamente il primo suo ownpumps; (2) per avviare la pum^ping quando l'acqua nella reservoirhad salito a all'interno di un piede della pompa house piano, e(3) per arrestare le pompe quando il serbatoio era stato pumpedout le apparecchiature principali consiste di due 6-inc

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Canadian engineer . ltimate popula-tion which this station would ever be called upon to takecare of, and the necessary pumps were installed in duplicate, in order that the station might never be shut down, in caseone unit needed overhauling. The station being small andisolated, as far as similar city equipments are concerned, theplant was designed to (i) automatically prime its ownpumps; (2) to start pum^ping when the water in the reservoirhad risen to within one foot of the pump house floor, and(3) to stop the pumps when the reservoir had been pumpedout The main equipment consists of two 6-inch special cen-trifugal sewage pumps, built by the John McDougall Cale-donian Iron Works Co., Limited, of Montreal. Each has acapacity of 800 imperial gallons per minute, andl is directconnected to a 40 h.p. induction motor. These pumps arestarted and stopped by Cutler-Hammer relay starters, operat-ed by floats that rise and fall with the level of the water inthe reservoir. As the pumps operate automatically, it was-. Sunnyside Pumping Station. considered good, practice to providte considerable reservepower to allow for anv possible variation in head. Heretofore the city has used vertical submerged centri-fugal pumps, but owing to the difficulty of reaching them ifthey ever required attention, and the desirability of hav-ing machinery where it could be frequently inspected, theengineers decided in favor of the horizontal type placed ona concrete floor above the reservoir, so that the motors wouldbe in a perfectly dry location. As foot valves could not beused on the suction line to keep the pump primed, due tothe fact that foreign matter contained in the water wouldlodge in the valve seats and prevent them from closingspecial device was designed which goes into operation justbefore one of the main sewage pumps, primes the pump, andholds the priming until the pump is in full operation. Adischarge air chamber contains a set of floats which operateat the proper time, causing a small

Parole chiave associate all'immagine

• bookcentury1800
• bookdecade1890
• bookpublishertoron
• bookyear1893