Page 196 - APPLIED PROCESS DESIGN FOR CHEMICAL AND PETROCHEMICAL PLANTS, Volume 1, 3rd Edition
P. 196
Pumping of Liquids 167
Shaft <!HAHNEL RING
STUFFING BOX
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
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 Impellers No distortion
balance axial thru1t streues an ,haft
BJeed off annulus piped
High efficiency, to suction noule puh both
long life labyrinth stuffing boxH
wearing rings
Renewable shaft
inHrted here
Casing support insures
rings are easily coupling alignment
replaceable Positive weening Impeller mounting with any temperature
ring seah eliminate h,okag& onures h,ok-proof ihoft
between case and rin�s sealing between stages
Figure 3-8. Refinery oil and boiler feed high pressure centrifugal pump. Courtesy Delaval Steam Turbine Co., currently Transamerica
Delaval, Inc.)
