Page 175 - Chemical Process Equipment - Selection and Design
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FEgure 7.17. Operating points of centrifugal pumps under a variety of conditions. (a) Operating points with a
particular pump characteristic and system curves corresponding to various amounts of flow throttling with a
ctontrol valve. (b) Operating point with two identical pumps in parallel; each pump delivers one-half the flow
and each has the same head. (c) Operating point with two identical pumps in series; each pump delivers
one-half the head and each has the same flow.
Second-Sfage Impelter, Return Guide Vanes
YStator blades
Ides
(b)
Figure 7.18. Heavy-duty centrifugal, axial, and reciprocating compressors. (a) Section of a three-stage compressor provided with
steam-sealed packing boxes (DeLaval Steam Turbine Co.). (b) An axial compressor (Clark Brothers Co.). (c) Double-acting, two-stage
reciprocating compressor with water-cooled jacket and intercooler (Zngersoll-Rand Co.).
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