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Please purchase the wearing parts of the pump according to the model of the pump.
| Wearing Part | Mechanical Seal | Bearing | Washer or O-ring |
| Replacement Criteria | Leakage over rated amount | Abnormality like much noises and leakage of oil take place | During normal maintenance |
| Replacement Frequency | One per year | 2-3 times per year | 2-3 times per year |
Note: The above frequency is the reference one under normal conditions.
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