Hawkins, N. (Nehemiah), 1833- · New York : Theo. Audel · leaf 324
pace, M. As this port is quite small the space fills slowly and thepiston moves gradually until it uncovers the last port, J,, whenthe full volume of steam is admitted, which quickly moves thepiston to the opposite end of the valve cylinder. During thismovement of the valve piston, the large port,… … Fio. m. 326 Pumps and Hydraulics. the exhaust vapor, it is compressed and forms a cushion for thevalve piston, I. The valve piston carries with it the main valve,D, which admits steam to the main steam cylinder through thedouble ports, E, Ei, and L, Lj, Fig. 294. The same cushioningand slow…
Hydraulic machinery · Pumping machinery
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