BUSCH Puxue screw vacuum pump maintenance and repair (NC2500B screw pump disassembly and repair). This vacuum pump has an impact during operation. It needs to be disassembled and repaired. As shown in the picture below, the pump cylinder and rotor are both worn. This is mainly due to the long-term use of the bearings, resulting in an increase in the gap. New bearings need to be replaced, the interior needs to be cleaned, and the worn parts need to be thoroughly maintained. Then, it is reinstalled, tested, and all data checks out before it can be used.

2. EDWARDS Edward screw vacuum pump maintenance and repair (IDX1300 screw pump disassembly and repair). This is a dry-type screw vacuum pump used in steel mills. It makes abnormal noises during operation, and the surface stability of the cylinder is high. As shown in the following picture, these are the disassembled components. The rotor surface and the cylinder have suffered severe wear and even blackening. These components all require special equipment for cleaning, grinding by hand, and surface spraying and other treatments. Only in this way can the performance of the installed vacuum pump be ensured to be similar to that of a new machine.

3. Maintenance and repair of the Korean dry screw vacuum pump (VPS-C900 screw pump repair). This is a vacuum pump used in the chemical industry. The internal rotor has become stuck and there are accumulated foreign objects inside. If not repaired in time, this pump worth hundreds of thousands of yuan might be completely scrapped.

4. Elmo-Rietschle Repair and Maintenance of the Rhythmic Screw Pump (Disassembly and Repair of VSI300 Screw Pump)

5. Leybold (Leybao) Screw Vacuum Pump Maintenance and Repair (Disassembly and Repair of SP630 Screw Pump)

From the above, it is easy to see that in the maintenance of common faults of dry screw vacuum pumps, the main issues are related to the pump getting stuck and making abnormal noises. This is because the dry screw vacuum pump has been running for a long time, causing internal components to loosen and insufficient lubrication. Professional vacuum pump maintenance technicians are required to disassemble and repair it, reinstall it, and then test it to ensure it is qualified before it can be put into use quickly.