Questions and answers on pumps and pumping machinery (1912)
Wakeman, William Henry, 1855- [from old catalog] · Chicago, The Joseph G. Branch publishing company · leaf 41
-fore the upper part 4 is displacing some of the waterand forcing it outward through the pipe shown. Theplunger 3 is simply passing through the water, withoutdisplacing it. The valve 2 is closed. 124. Q. Is this a positive operation? A. It is. Water will be forced against any pres-sure for which… … FI6 15 PUMPS AND PUMPING MACHINERY. 31
Pumping machinery
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