Hawkins, N. (Nehemiah), 1833- · New York : Theo. Audel · leaf 237
n in Fig. 215,The principal feature of this pump is its valve; there is butone valve for the suction and one for the discharge, whichgreatly simplifies the pump end. When working against highpressures, the ordinary rubber or leather faced valves are often-times pounded to pieces, but in this… … ^^^^<s^^S-KJ^-^ Fio. 215. inches, and an area suflficiently large to reduce the velocityof the water flowing through it to a few feet per second. At the beginning of the stroke the valve opens automatically,controlled, however, by a very simple and effective mechanicaldevice, and it remains open…
Hydraulic machinery · Pumping machinery
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