Mechanics of the household; a course of study devoted to domestic machinery and household mechanical appliances (1918)
Keene, E. S. (Edward Spencer), b. 1864 · New York, McGraw-Hill book company, inc.; · leaf 46
water returns to the boilerin much the same manner as in the pressure systems already de-scribed but the air escapes through the air eliminator as indi-cated in the drawing. The system is, therefore, under atmos- THE STEAM HEATING PLANT 35 pheric pressure at this point and only a slight amount… … Fig. 31a.—Diagram showing the C. A. Dunham Co.s system of vapor heating. main return is placed 24 inches or more above the water line ofthe boiler. It is the pressure of this column that forces thewater into the boiler through the check valve, against the vaporpressure in the boiler. 36 MECHANICS…
Heating · Lighting · Plumbing
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