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Common Faults And Treatment Methods Of Vacuum Pump Mar 19, 2020
| Failure phenomenon | cause of issue | Approach |
| Pump negative | The water level in the vacuum pump is too high when starting | Start at the specified water level (below the automatic drain valve) |
| Load too large | The packing gland is too tight | Relax the gland |
| Internal parts rust | Tighten the rotor and rinse with water | |
| Increased discharge pressure | Check the exhaust pipe and valve diameter are too small | |
| Improper adjustment of distribution screen current protection | Adjust thermal relay to current rating | |
| Pump stuck | Foreign matter such as welding slag is sucked into the pump body | Clean up |
| Low vacuum | Severe scaling | Disassembly and cleaning |
| Insufficient water supply or high water temperature | Adjust the water supply and check whether the water supply pipeline is blocked. | |
| System leaks | Check the tightness of the pipe connections. | |
| The medium is corroded or the material is abraded, which increases the gap between the internal parts. | Purification medium | |
| Packing seal leak | Tighten packing gland | |
| Severe internal scaling | Remove scale | |
| Parts corrosion | Replacement parts | |
| After repair, the axial clearance does not meet the requirements | Readjust axial clearance | |
| Running sound | Gas flushing or jetting | Retrofit injector |
| Abnormal sound | Suction and exhaust pipe walls are too thin | Use a thicker trachea |
| Pump cavitation under high vacuum | Use lower temperature working water, or make up gas on the suction side, also can be equipped with ejector. | |
| Large vibration | The base is not in good contact with the foundation, and the anchor bolts are loose. | Fill the base clearance with concrete and tighten the anchor bolts. |
| Bearing | Motor and pump misalignment | Re-center |
| Misalignment of motor and pump | Re-center | |
| Poor lubrication, dry or too much grease. | Improve lubrication conditions | |
| Improper bearing installation | Readjust bearing position | |
| Bearing rust, abrasion, scratched raceway | Replace bearing |
Previous: Vacuum Pump System
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