Page 94 - Centrifugal Pumps Design and Application

76 Centrifugal Pumps: Design and Application

Figure 6-8. Multi-stage rotating element.

As a guide to selecting bolt size use:

Number of bolts =
S x A R

Notation

P Hydrotest pressure (psi)
A Total area at split minus total area of bolt hole relief diameter (sq
in.)
S Allowable bolt stress (psi)
A R Root area of bolt thread (sq in.)