The main technical performance of the vacuum pump 275 meets the design requirements or the process requirements, and the auxiliary equipment is complete; the equipment runs smoothly, the sound is normal, there is no overheating, and the sealing is good.

　　The lubrication system of the rotary vane vacuum pump 275 is in good condition, the quality of the lubricating oil meets the specified requirements, and regular inspections and oil changes are carried out. The indication values of various instruments are correct, and the calibration is carried out regularly; the valves are flexible in opening and closing, well sealed, and have no leakage; there is no leakage in the pipeline, and regular inspections are carried out.

　　The motor is reasonably equipped, operates normally, the electrical circuit is safe and reliable, there are grounding protection measures, the electrical device is reliable, and the electrical instrument indication is correct; the safety protection device is complete. Vacuum pump 275 equipment and cooling system facilities are clean and rust-free. The cooling system of the water ring vacuum pump is in normal operation, the cooling device is in good condition, the drainage temperature does not exceed the specified requirements, and there should be a water cutoff protection device.

　　When going to the outlet of the pump, the bubbles formed start to collapse. This will generate a lot of noise, and at the same time the pump drive wheel and pump cavity and other components are gradually damaged. Suppliers of vacuum pumps 275 consider this phenomenon commonly referred to as cavitation. Once cavitation occurs, a small amount of fresh air is introduced through a small valve.