Minimum running clearances, Reassembly, Assemble the bundle – Goulds Pumps 7200CB - IOM User Manual
Page 91
Maintenance
NOTICE:
The impeller and wear-ring clearance setting procedures must be followed. Improperly
setting the clearance or not following any of the proper procedures can result in sparks,
unexpected heat generation, and equipment damage.
All replacement impeller wear rings are supplied 0.020 in. to 0.030 in. (0.508 mm to 0.762
mm) oversize. See the table Minimum running clearances for final running clearances.
Machine the impeller rings accordingly.
When the impeller assembly is supplied as a spare part (impeller with wear rings), the wear
rings are machined to the required dimension.
Minimum running clearances
Impeller wear rings
Balance drum sleeve (128) and interstage sleeve (204) clearance is 0.010 in (0.25 mm). Impeller wear
rims clearance is 0.010 in (0.25 mm) if Goulds standard or per below table if API 610. Note tolerance on
clearance is +/-0.002 in (0.05 mm)
Diameter of rotating member at clearance
Minimum diametrical clearance
in.
mm
in.
mm
3.500 to 3.999
90.00 to 99.99
0.014
0.36
4.000 to 4.499
100.00 to 114.99
0.015
0.38
4.500 to 4.999
115.00 to 124.99
0.016
0.41
5.000 to 5.999
125.00 to 149.99
0.017
0.43
6.000 to 6.999
150.00 to 174.99
0.018
0.46
7.000 to 7.999
175.00 to 199.99
0.019
0.48
8.000 to 8.999
200.00 to 224.99
0.020
0.51
9.000 to 9.999
225.00 to 249.99
0.021
0.53
10.000 to 10.999
250.00 to 274.99
0.022
0.56
11.000 to 11.999
275.00 to 299.99
0.023
0.58
12.000 to 12.999
300.00 to 324.99
0.024
0.61
Reassembly
Assemble the Bundle
1. Install the impeller wear rings (202, 202A, 202B and 203).
See Replace the wear rings in the Preassembly inspections section.
2. Install the casing wear rings (164, 164A, 164B and 144).
See Replace the wear rings in the Preassembly inspections section.
3. Install throat bushing (125), interstage bushing (146) (double suction pumps only) and
balance drum (129).
See Replace the wear bushings in the Preassembly inspections section.
NOTICE:
The wear ring clearance setting procedures must be followed. Improperly setting the
clearance or not following any of the proper procedures can result in sparks, unexpected
heat generation and equipment damage.
Model 7200CB, API Type BB5 Barrel Multistage / ISO 13709 2nd Edition / API 610 11th Edition Installation, Operation, and
89
Maintenance Manual