Diffusion pump oils are categorized and specified according to their types, including mineral oils, synthetic oils, and semi-synthetic oils, all of which adhere to national and, in some cases, industry standards. These standards encompass two types of indicators: physical and chemical properties, as well as performance metrics. Regardless of the type of diffusion pump oil, the primary performance requirement is to have excellent lubricating properties, reducing friction and wear on moving parts, ensuring high efficiency and long service life for the vacuum pump.

Please note the following precautions when using diffusion pump oil:

The oil-filling windows must be kept clean and free from direct sunlight and outdoor storage. They should be stored in a cool, dry, and well-ventilated area to prevent moisture and dust from contaminating the contents.

When extracting or filling oil, ensure all the small rain around the bucket lid is removed to prevent debris from mixing with the oil, which can cause pump wear.

Do not mix diffusion pump oils of different brands or varieties, and do not mix new and old oil products.

Avoid mixing vacuum oil with other lubricants, and never mix it with light oil products; otherwise, it will affect the vacuum performance.

5. Vacuum pumps should avoid extracting solvents, steam, and corrosive gases as much as possible. When necessary, they must be regularly checked and oiled.

6. When changing the oil, make sure to completely drain the used oil from the pump body. After pouring in the new oil, slowly rotate the pump shaft to clean the pump cavity and drain any residual oil. Repeat the cleaning process several times, and then replace with fresh oil once it is thoroughly clean.

During major pump repairs, it is essential to clean all pump components with solvents or cleaning agents and then dry them thoroughly.

8. Fueling equipment must be dedicated devices, not containers that have previously held other oils or solvents; suction pumps.

When switching from mineral oil to ester oil or other synthetic oils, the pump should be disassembled for thorough cleaning. All components must be soaked in ester oil to prevent contamination.

If chemical gases and solvents are inhaled and contaminate the pump oil, affecting the vacuum, it is necessary to clean and change the oil.

11. Oil Change Deadline: Replace oil when the vacuum of the pump oil drops, failing to meet the requirements; or when the color of the pump oil deepens to a brownish hue.