Questions and answers on pumps and pumping machinery (1912)
Wakeman, William Henry, 1855- [from old catalog] · Chicago, The Joseph G. Branch publishing company · leaf 108
FIG-.58 PUMPS AND PUMPING MACHINERY. 97 A. In acid-works, for the removal of obnoxiousand dangerous fumes, also in the bisulphite process ofpapermaking. Fig. 60 illustrates a vertical, duplex airpump, or exhauster. … Fi<b.59 348. Q. Why are the air cylinders larger than thesteam cylinders? A. Because steam at high pressure is used, while 98 QUESTIONS AND ANSWERS ON air, or other gases and fumes, are transferred at lowpressure and large volume. They are fitted withmechanically operated valves.
Pumping machinery
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