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Maintenance
125
184
230
Figure 14: Seal chamber cover wear ring
When to replace wear rings
Replace wear rings when the diametrical clearance exceeds two times the minimum clearance
as shown in this table or when the hydraulic performance has decreased to unacceptable
levels.
Table 7: Minimum running clearances
Diameter of impeller wear ring
in.
<2.000
2.000 to 2.4999
2.500 to 2.999
3.000 to 3.499
3.500 to 3.999
4.000 to 4.499
4.500 to 4.999
5.000 to 5.999
6.000 to 6.999
7.000 to 7.999
8.000 to 8.999
9.000 to 9.999
10.000 to 10.999
10.000 to 11.999
12.000 to 12.999
Replace the wear rings
WARNING:
Dry ice and other chilling substances can cause physical injury. Contact the supplier for information and
advice for proper handling precautions and procedures.
72
Model 3700, API Type OH2 / ISO 13709 1st and 2nd Ed. / API 610 8/9/10/11th Ed. Installation, Operation, and Maintenance
Seal-chamber throat bushing
Seal-chamber cover
Seal-chamber cover wear ring
Minimum diametrical clearance
mm
in.
<50
0.010
To to 64.99
0.011
65 to 79.99
0.012
80 to 89.99
0.013
90 to 99.99
0.014
100 to 114.99
0.015
115 to 124.99
0.016
125 to 149.99
0.017
150 to 174.99
0.018
175 to 199.99
0.019
200 to 224.99
0.020
225 to 249.99
0.021
250 to 274.99
0.022
275 to 299.99
0.023
300 to 324.99
0.024
mm
0.25
0.28
0.30
0.33
0.35
0.38
0.40
0.43
0.45
0.48
0.50
0.53
0.55
0.58
0.60
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Troubleshooting
