Maintenance
Minimum running clearances
Impeller wear rings
Replace wear rings when the diametrical clearance exceeds 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
in.
mm
in.
mm
<2.000
<50.00
0.010
0.25
2.000 to 2.4999
50.00 to 64.99
0.011
0.28
2.500 to 2.999
65.00 to 79.99
0.012
0.30
3.000 to 3.499
80.00 to 89.99
0.013
0.33
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
13.000 to 13.999
325.00 to 349.99
0.025
0.63
14.000 to 14.999
350.00 to 374.99
0.026
0.66
15.000 to 15.999
375.00 to 399.99
0.027
0.69
16.000 to 16.999
400.00 to 424.99
0.028
0.71
17.000 to 17.999
425.00 to 449.99
0.029
0.74
18.000 to 18.999
450.00 to 474.99
0.030
0.76
19.000 to 19.999
475.00 to 499.99
0.031
0.79
20.000 to 20.999
500.00 to 524.99
0.032
0.81
21.000 to 21.999
525.00 to 549.99
0.033
0.84
22.000 to 22.999
550.00 to 574.99
0.034
0.86
23.000 to 23.999
575.00 to 599.99
0.035
0.89
24.000 to 24.999
600.00 to 624.99
0.036
0.91
25.000 to 25.999
625.00 to 649.99
0.037
0.94
For diameters greater than 25.999 in. (649.99 mm), the minimum diametrical clearances shall
be 0.037 in. (0.94 mm) plus 0.001 inch for each additional inch of diameter or fraction thereof
(1 mm for each additional 1 mm).
Reassembly
Assemble the rotating element
WARNING:
Crush hazard. The unit and the components can be heavy. Use proper lifting methods and wear steel-
toed shoes at all times.
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Model 3610, API Type BB1 API 610 11th Edition Installation, Operation, and Maintenance Manual