Table 2.
Number of samples.
| Pressure | Number of samples | |||
|---|---|---|---|---|
| Normal | Mechanical seal hole | Mechanical seal scratch | Impeller fault | |
| 3 bar | 349 | 341 | 365 | 338 |
| 3.5 bar | 359 | 331 | 371 | 359 |
| 4 bar | 325 | 351 | 478 | 376 |
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