. A text book of physics, for the use of students of science and engineering . - E FIG. 294, -Section of a lift P^eT FlO. 295.—Section of a boiler feed pump. Taking the pressure of the atmosphere to be equivalent to a headof 30 inches of mercury, or 30 x 13-59 -407-7 inches of water, wesee thai the pressure of the atmosphere is incapable of forcing waterto a heighl greater than about 34 feet. The cylinder of a lift pump1 placed usually at a height not exceeding 30 feet from the freesurface of the water in the well. XIX EXERCISES 271 Force pumps.—In force pumps the piston is employed for
. A text book of physics, for the use of students of science and engineering . - E FIG. 294, -Section of a lift P^eT FlO. 295.—Section of a boiler feed pump. Taking the pressure of the atmosphere to be equivalent to a headof 30 inches of mercury, or 30 x 13-59 -407-7 inches of water, wesee thai the pressure of the atmosphere is incapable of forcing waterto a heighl greater than about 34 feet. The cylinder of a lift pump1 placed usually at a height not exceeding 30 feet from the freesurface of the water in the well. XIX EXERCISES 271 Force pumps.—In force pumps the piston is employed for forcingliquids into vessels in which the pressure is higher than that of theatmosphere. For example, the pump employed to feed water intoa steam boiler has to force the water to enter the boiler against thepressure of the steam in the boiler. Such a pump is shown in sectionin Fig. 295. A is the cylinder with a ram, or plunger, B. Waterenters the cylinder, passing the valve C, during the upward strokeof the plunger, and is delivered through another valve D during thedownward stroke of the plunger. The valve D
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Keywords: ., bookcentury1900, bookdecade1910, bookpublishe, booksubjectphysics
