Page 194 - APPLIED PROCESS DESIGN FOR CHEMICAL AND PETROCHEMICAL PLANTS, Volume 1, 3rd Edition

Pumping of Liquids 167

Shaft CMANNEL RING

GLAND
Care should be given in selecting the shaft material. It
must be resistant to the corrosive action of the process flu-
ids, yet possess good strength characteristics for design.
For some designs it is preferable to use a shaft sleeve of

THRUST BEARING
SHAFTSLEEVE
I IMPELLERS
FLUID PASSAGES
Figure 3-6. Cross-section horizontal two-stage horizontal split case
centrifugal pump. (Courtesy Ingersoll-Rand Co.)

Figure 3-5. External view double suction single-stage pump. (Cour- Figure 3-7. Exterior view of horizontal two-stage split case centrifu-
tesy Allis-Chalmers Mfg. Co.) gal pump. (Courtesy Ingersoll-Rand Co.)
Opposed Impollerr No distortion
balance axial thrust stresses on shoh
Bleed off annulus pip4
High efficiency, to suction nozzle puts both
long life labyrinth stuffing bores
wwring rings under sucRon pressure
\ Flexibility in packing

Figure 3-8. Refinery oil and boiler feed high pressure centrifugal pump. Courtesy Delaval Steam Turbine Co., currently Transamerica
Delaval, Inc.)