•
When the volute casing (102V) or casing cover (161) without a wear ring must be repaired, you
can install a wear ring in order to renew pump performance. The volute casing and/or the cas-
ing cover must be re-machined. Contact your ITT representative for assistance.
230
102V
502.11
s
Radial clearance
D
Nominal diameter
102V
Volute casing
230
Impeller
502.11
Optional wear ring
Figure 42: Impeller clearance, suction side
230
161
a
a
Axial clearance
161
Seal chamber/stuffing box cover
230
Impeller
Figure 43: Impeller clearance, back
vanes
230
161
502.31
s
Radial clearance
D
Nominal diameter
161
Seal chamber/stuffing box cover
230
Impeller
502.31
Optional wear ring
Figure 44: Impeller clearance, drive side
Measure the radial clearance (s) on the drive
side of the impeller on the following sizes only:
•
100-65-315
•
125-80-315
•
125-80-400
•
125-100-315
•
125-100-400
•
150-125-315
•
150-125-400
•
200-150-315
•
200-150-400
Table 6: Impeller clearance limits
Nominal diameter D mm | in
60/68
85
100/120/13
5
155/175
220
Radial clear-
ance (s)
New
Min.
0.15 mm | 0.005
in.
0.17 mm |
0.007 in.
0.20 mm |
0.008 in.
0.22 mm |
0.009 in.
0.25 mm |
0.010 in.
Max.
0.19 mm | 0.007
in.
0.22 mm |
0.009 in.
0.24 mm |
0.009 in.
0.27 mm |
0.010 in.
0.30 mm |
0.012 in.
Wear limits
0.78 mm | 0.030
in.
0.85 mm |
0.033 in.
0.90 mm |
0.035 in.
1.05 mm |
0.041 in.
1.15 mm |
0.045 in.
Axial clear-
ance (a)
New
0.8 to 1.2 mm | 0.031 to 0.047 in.
Wear limits
1.7 mm | 0.067 in.
Frame adapter check and replacement
•
Replace the frame adapter if it has cracks or excessive corrosion damage.
6.5 Pre-assembly inspections
Model IC, ICI, ICH, ICIH Installation, Operation, and Maintenance Manual
75