School water system renovation

After the completion of the school water system renovation project, the frequency conversion water pump unit and pipelines should undergo the following maintenance operations during a period of use:

1. Drain the remaining water from the water pump and pipeline.

2. If disassembly is convenient, the water pump and pipeline can be removed and cleaned thoroughly.

3. Check the ball bearings and replace them if there is wear, looseness, ball wear, or surface spots on the inner and outer sleeves. Clean the bearings with gasoline or kerosene and apply butter for storage if they are still usable.

4. Check if there are cracks or small holes on the impeller, and if the impeller fixing nut is loose. If there is any damage, it should be repaired or replaced. Check the clearance at the impeller wear reducing ring. If it exceeds the specified value, it should be repaired or replaced.

5. If the variable frequency water pump and pipeline are not disassembled, use a cover plate to seal the outlet to prevent debris from entering.

6. When the transmission tape is not in use, it should be removed, cleaned and dried with warm water, and stored in a place without direct sunlight. It should also not be stored in places with oil stains, corrosive substances, or smoke. In any case, the school's centralized water boosting system should not allow the tape to be contaminated with oil substances such as engine oil, diesel, or gasoline, and should not apply rosin or other viscous substances to the tape. Before using the tape, the white powder on the contact surface of the tape must be removed.

7. Rinse all screws and bolts clean with a wire brush and apply engine oil or soak them in diesel for storage.