How often is the vacuum pump oil replaced, what will happen if it is not replaced?

February 03, 2024

How often is the vacuum pump oil replaced, what will happen if it is not replaced?

For oil-lubricated rotary vane vacuum pumps, vacuum pump oil is essential. It can not only ensure the smooth operation of the vacuum pump, so that the blade can slide freely, but also effectively seal the compression chamber. However, in the use of oil-lubricated rotary vane vacuum pump, in addition to the daily oil level check, waste oil replacement, how much do you know about vacuum pump oil?

How often must the vacuum pump oil be replaced?

When you use a vacuum pump, you may have such a question: How often do I need to change the oil of my pump? Two months? Three months? Or six months?

This depends on the specific application, operation mode, machine condition and environmental conditions. Although the oil can be stored for a long time under ideal conditions, when used in a vacuum pump, the oil will age even if it is not running.

The general instructions recommend a semi-annual oil change, but this is the time for typical cleaning applications. A variety of applications vary widely, according to the color of the pump oil to determine whether the pump oil should be replaced is the most accurate way.

Therefore, in order to achieve excellent performance and long service life of the vacuum pump and its components, it is recommended to replace the vacuum pump oil at least twice a year.

What happens if the vacuum pump oil is not changed regularly?

First of all, the performance of the vacuum pump will gradually decline: the ultimate pressure will be reduced, the vacuum time will be extended, and the noise and vibration levels will be increased. Second, wear increases, while the corrosion resistance of metal parts decreases. If the vacuum pump oil produces cracking, coupled with the increase in viscosity at low temperatures, it will lead to start-up problems. Even if the motor still has enough power to start, and the coupling can still bear the load, the power consumption of the vacuum pump will also increase significantly.

What is the difference between mineral vacuum pump oil and synthetic vacuum pump oil?

Mineral vacuum pump oils cover basic industrial applications such as pumping air as well as small amounts of water vapor, which are suitable for low to medium operating temperatures. Synthetic vacuum pump oils have better viscosity characteristics than mineral vacuum pump oils and are therefore suitable for harsh applications requiring higher process loads (e.g., acids, chemicals) and operating temperatures.

Does only oil-lubricated rotary vane vacuum pump need vacuum pump oil?

Not really, even dry vacuum pumps, blowers and compressors need to fuel their gearboxes to prevent them from wearing out prematurely and to ensure smooth operation at low noise and vibration levels. When selecting the vacuum pump oil for all vacuum pumps, the appropriate vacuum pump oil should be selected according to the vacuum pump and the application.

How long is the shelf life of vacuum pump oil?

If stored in the original container according to the recommended storage conditions, the shelf life of the original vacuum pump oil can be up to four years (from the date of production).

Recommended storage conditions: A dry and clean storage space, an ambient temperature between 0 and 40°C, a relative humidity of less than 70%, no direct sunlight, a properly sealed container, and no foreign matter entering the container.

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