Heating and ventilating buildings : a manual for heating engineers and architects . Fig. 148.—U-shaped Ma-nometer. 184 HEATING AND VENTILATING BUILDINGS. tube it will be forced down on the side of the greater pressureand upward on the side of the less, adistance proportional to the height of the fluid in one side inexcess of that on the other will be ameasure of the difference of pressure be-tween that of the atmosphere and thatin the vessel. Various forms of manometers areused, of which several are shown in For very low pressures water isthe liquid generally employed; fo
Heating and ventilating buildings : a manual for heating engineers and architects . Fig. 148.—U-shaped Ma-nometer. 184 HEATING AND VENTILATING BUILDINGS. tube it will be forced down on the side of the greater pressureand upward on the side of the less, adistance proportional to the height of the fluid in one side inexcess of that on the other will be ameasure of the difference of pressure be-tween that of the atmosphere and thatin the vessel. Various forms of manometers areused, of which several are shown in For very low pressures water isthe liquid generally employed; for mod-erate pressures up to 15 or 25 poundsmercury is very convenient, and oftenused; while for high pressures a pressure-gauge (Fig. 1501, as described later, iscommonly employed. The Bourdon pressure-gauge is or-dinarily used. This consists of a tubeof elliptical cross-section bent into acircular form. The free end of the tube is attached by gearing to a hand which moves over a dial. Pressure on the interior of the tube tends to straighten it, and. Fig. 149.—r -11 \ri dManometer Tubi b.
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Keywords: ., bookcentury1900, bookdecade1910, bookpublishernewyo, bookyear1910
