Hawkins, N. (Nehemiah), 1833- · New York : Theo. Audel · leaf 308
e.Steam escaping from one end of the steam chest causes a differ-ence of pressure on the two ends of the valve piston, from whichwe realize the power to move the main valve. The tappetvalves, having a very slight lift, operate without shock or noise.The main valve is connected with the valve piston… … /^<yy?»^»»y^x?;»t»^^^ 310 rnui/s iXui HydrauUcs. To set the valves of this pump. Simply keep the valves inorder. The motion of the piston as it nears the end of thestroke opens and closes the valves. THE KNOWLES. In the Knowles pump a valve piston, G, Fig. 277, in thesteam chest moves the main…
Hydraulic machinery · Pumping machinery
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