As the performance advantages of vacuum pumps are widely recognised, their use is becoming increasingly common. They offer benefits such as simple operation, good resistance to chemical corrosion and an attractive appearance. Below, let us take a look at the precautions to be observed when changing the oil in a vacuum pump.

When changing the oil in a vacuum pump, the first step is to disconnect the pump from the vacuum system. The motor end of the base should then be raised slightly, open the drain plug to drain the oil, rotate the unit whilst covering the exhaust port to ensure all contaminated oil is completely drained from the chamber via the drain port, then add 100–500 ml of new oil through the inlet port and continue rotating for at least 5–10 revolutions to clean the interior. Repeat this procedure 3–5 times. Once all the contaminated oil has been drained, refit the drain plug, place the pump in a horizontal position, and add fresh oil through both the inlet and the filling port; the oil change is then complete.

When changing the oil in a vacuum pump, the motor should not be run for prolonged periods, as this can cause the exhaust valve plate to vibrate excessively and suffer fatigue. When changing the oil in a vacuum pump, the use of kerosene, petrol, alcohol or similar substances to clean the pump without dismantling it is strictly prohibited. If the pump is to be left idle for a prolonged period, care should be taken to remove the exhaust hood, fit an exhaust plug, seal the inlet port and drain off any accumulated water. Lubricating oil plays a vital role in the operation of vacuum pumps; not only does it reduce wear and tear on internal components, but it also ensures smoother and more flexible operation. However, if the lubricating oil becomes contaminated or filled with impurities, it will accelerate component wear and prevent the pump from functioning properly. Therefore, when changing the oil in the unit, it is essential to follow the correct operating procedures.

The above outlines the precautions regarding oil changes for vacuum pumps. Please familiarise yourself with these guidelines and select the appropriate method based on your actual requirements to avoid unnecessary complications arising from improper use. Should you have any queries, please do not hesitate to contact us; as a specialist manufacturer, we are able to provide you with professional advice.