Questions and answers on pumps and pumping machinery (1912)
Wakeman, William Henry, 1855- [from old catalog] · Chicago, The Joseph G. Branch publishing company · leaf 193
d water. 636. Q. What prevents steam, air and waterfrom being thoroughly mixed, resulting in water ham-mer? A. When a body of air is confined between steamand water it effectually prevents a mixture until theair is allowed to escape. All heating engineers arefamiliar with this fact. 637. Q. While… … FI&./I8 PUMPS AND PUMPING MACHINERY. 183 RG.US 184 QUESTIONS AND ANSWERS ON 638. Q. How is steam admitted to and shut offfrom these chambers at the proper time to give goodresults? A. By a rotary steam valve. 639. Q. How is this valve operated? A. By the small rotary three-cylinder engine,shown…
Pumping machinery
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