Among various industrial oils, vacuum diffusion pump oil is like a brilliant pearl, emitting a unique glow. Compared with ordinary lubricants, it has a world of difference in terms of performance and application scenarios. It is specifically designed to meet the demanding requirements of high vacuum environments. 
The characteristics of vacuum diffusion pump oil are remarkable. Firstly, it has a lower saturated vapor pressure, which is the key to achieving high vacuum. The lower saturated vapor pressure means that under the working temperature, the oil molecules are less likely to volatilize into gas, thereby reducing the pollution to the vacuum environment and ensuring that the vacuum system can stably maintain a high vacuum state. When used in the vacuum coating process in semiconductor manufacturing, the low saturated vapor pressure of the diffusion pump oil can prevent oil vapor from mixing into the coating material, ensuring the high quality and purity of the film, and providing reliable support for the manufacturing of precision devices such as chips. 
Good oxidation stability and thermal stability are also its important characteristics. In high-temperature and frequently metal catalytic working environments, it is less prone to oxidation and deterioration. Taking vacuum smelting as an example, when exposed to high temperatures for a long time, ordinary oil may quickly oxidize and fail, while vacuum diffusion pump oil can remain stable and effectively extends the service life of the equipment, reducing equipment downtime due to oil replacement and improving production efficiency. 
Furthermore, its return oil rate is low. Oil vapor encountering a cold wall can quickly condense into new working fluid, significantly reducing the impact of return oil on the vacuum system. In the optical lens coating process, the low return oil rate ensures that the lens surface is not contaminated by oil, thereby guaranteeing the optical performance of the lens, allowing us to have clearer and higher-quality optical products. 
Thanks to its unique characteristics, vacuum diffusion pump oil demonstrates many advantages in practical applications, providing strong support for the efficient and stable operation of industrial production, becoming an indispensable key material in many high-vacuum fields, and driving related industries to continuously reach new heights.