Worthen, William Ezra, 1819-1897, [from old catalog] ed · New York, Appleton · leaf 389
rflow at the end of thestroke. The great desideratumofr water - valves is that thereshould be little lift, but amplewater-way. Fig. 853 is a section of Fields pump-valves, an English design for high-waterservice, as fire-pumps, of which the flaps are rubber disks. For lower pressures,as for the… … Fig. 853.
Mechanical drawing
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