. The miller, millwright and millfurnisher. way with the cost of a heater. There is no oil needed. The inspirator willlift water twenty-five feet, with forty-five pounds steam pressure, and deliverit into tanks or in the boilers. It will take water as hot as 140° on a lift ofthree or four feet or under a head, and on a lift of twenty-five feet it willtake it at 100° to 110° F. The temperature at which it will deliver the v/ater 144 BOILERS. depends upon the steam pressure, the temperature of the water drafted andthe quantity of steam used upon the forcer side. The higher the steam press-ure, t
. The miller, millwright and millfurnisher. way with the cost of a heater. There is no oil needed. The inspirator willlift water twenty-five feet, with forty-five pounds steam pressure, and deliverit into tanks or in the boilers. It will take water as hot as 140° on a lift ofthree or four feet or under a head, and on a lift of twenty-five feet it willtake it at 100° to 110° F. The temperature at which it will deliver the v/ater 144 BOILERS. depends upon the steam pressure, the temperature of the water drafted andthe quantity of steam used upon the forcer side. The higher the steam press-ure, the higher the water would draft, and the more steam left in on theforcer side, the higher will be the temperature at which it will deliver fifty or sixty pounds steam pressure, and about one-quarter turn of thehandle on the forcer side, the water will be delivered from i6o° to 190° temperature of the water delivered may also be increased by givingmore steam on the starting valve, or by throttling the water supply. The. OVERFLOW Fig. 61.—Section of Hancock Inspirator. lifter side alone will lift water twenty-four feet, and deliver it twenty feetabove the apparatus, with forty pounds of steam, heating the water at 20°.With the lifter and forcer together it may be said that the water can be forcedtwo feet above the inspirator for every pound of steam pressure. In applying and running the inspirator, care should be taken that thesuction is tight, so as to give a good vacuum ; that the steam comes directfrom the boilers, and from that portion of the boiler where it will be drysteam. Taking steam for the inspirator from the steam pipe has the disad-vantage that the steam will not be so dry as if taken from the boiler direct;and, further, that if this steam pipe supply an engine cylinder, the supply to INSPIRATOR—STEAM TRAP, ETC. 145 the inspirator will be apt to be irregular. Where it is absolutely necessaryto tap a steam pipe, it should be tapped upon the
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectflourmi, bookyear1882
