Mechanical equipment of buildings; a reference book for engineers and architects (1916)
Harding, Louis Allen, Willard, Arthur C. (Arthur Cutts), 1878-1960 · New York Wiley · leaf 491
em at any time. 466 HEATING AND VENTILATION Diaphragm Motors. These motors (Fig. 19) range from 4 to 15 in diameter of diaphragmwith double springs above the diaphragm. The large sizes are capable of lifting several hun-dred pounds. These motors operate the mixing dampers, which are designed to… … i 1 1 1 I I i i I I i Fig. 18. Prinxiple of Johnson Stlphox Val\e. at any point. Brass-mounted or ball bearings should be used, and in the larger sizes^ where asingle blade would be hable to sag or bend out of shape, louvered dampers (Fig. 21) should berequired. Air Compressors. Air compressors,…
Building · Heating · Ventilation
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