NOTICE:
The impeller and wear-ring clearance setting procedures must be followed. Improperly set-
ting the clearance or not following any of the proper procedures can result in sparks, unexpect-
ed heat generation, and equipment damage.
All replacement impeller wear rings, except those that are hard-faced, are supplied 0.508 mm to
0.762 mm | 0.020 in. to 0.030 in. oversize. See the table Minimum running clearances for final run-
ning clearances. Machine the impeller rings accordingly.
Spare hard-faced impeller wear rings are not supplied oversize but are supplied to pre-established
proper running clearances when both impeller and casing wear rings are renewed.
When the impeller assembly is supplied as a spare part (impeller with wear rings), the wear rings
are machined to the required dimension.
6.5.4.3 Minimum running clearances
Impeller wear rings
Replace wear rings when the diametrical clearance exceeds 1.5X the values shown in this table or when the
hydraulic performance has decreased to unacceptable levels:
Diameter of rotating member at clearance
Minimum diametrical clearance
mm
in.
mm
in.
<50.00
<2.000
0.25
0.010
50.00 to 64.99
2.000 to 2.4999
0.28
0.011
65.00 to 79.99
2.500 to 2.999
0.30
0.012
80.00 to 89.99
3.000 to 3.499
0.33
0.013
90.00 to 99.99
3.500 to 3.999
0.36
0.014
100.00 to 114.99
4.000 to 4.499
0.38
0.015
115.00 to 124.99
4.500 to 4.999
0.41
0.016
125.00 to 149.99
5.000 to 5.999
0.43
0.017
150.00 to 174.99
6.000 to 6.999
0.46
0.018
175.00 to 199.99
7.000 to 7.999
0.48
0.019
200.00 to 224.99
8.000 to 8.999
0.51
0.020
225.00 to 249.99
9.000 to 9.999
0.53
0.021
250.00 to 274.99
10.000 to 10.999
0.56
0.022
275.00 to 299.99
11.000 to 11.999
0.58
0.023
300.00 to 324.99
12.000 to 12.999
0.61
0.024
325.00 to 349.99
13.000 to 13.999
0.63
0.025
350.00 to 374.99
14.000 to 14.999
0.66
0.026
375.00 to 399.99
15.000 to 15.999
0.69
0.027
400.00 to 424.99
16.000 to 16.999
0.71
0.028
425.00 to 449.99
17.000 to 17.999
0.74
0.029
450.00 to 474.99
18.000 to 18.999
0.76
0.030
475.00 to 499.99
19.000 to 19.999
0.79
0.031
500.00 to 524.99
20.000 to 20.999
0.81
0.032
525.00 to 549.99
21.000 to 21.999
0.84
0.033
550.00 to 574.99
22.000 to 22.999
0.86
0.034
575.00 to 599.99
23.000 to 23.999
0.89
0.035
6.5 Preassembly inspections
90
3620 i-FRAME API type BB2 single stage / ISO 13709 2nd Ed/API 11th Ed Installation, Operation, and Maintenance
Manual
Summary of Contents for GOULDS PUMPS i-FRAME 3620
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