Molecular Pumps: The Winner of Future Vacuum Technology

In the field of vacuum technology, molecular pumps and diffusion pumps each have their own unique applications and advantages. However, with the continuous advancement of technology, molecular pumps have gradually shown their significant advantages in performance and efficiency, indicating that diffusion pumps will be gradually replaced.

In the field of vacuum technology, molecular pumps and diffusion pumps each have unique applications and advantages. However, with the continuous development of technology, the obvious advantages of molecular pumps in performance and efficiency are becoming more and more significant, which means that diffusion pumps will face the situation of being gradually replaced.

1. Higher vacuum degree:

    Molecular pumps can achieve higher vacuum levels, usually up to the 10^-10Torr level, while the ultimate vacuum level of diffusion pumps is generally around 10^-8Torr. This makes molecular pumps the first choice in applications that require ultra-high vacuum environments.

2. Lower risk of contamination:

    The molecular pump adopts an oil-free design, which completely avoids the pollution problem caused by oil vapor and can provide purer working conditions in a vacuum environment. This feature is particularly important in applications with strict vacuum requirements, such as semiconductor manufacturing and high vacuum scientific experiments, because tiny contamination may seriously affect experimental results and product quality. In contrast, the diffusion pump relies on oil as the working medium, which is easy to evaporate at high temperature and introduce contaminants, thus affecting the performance of the equipment and the reliability of the experiment.

3. Higher pump speed:

    Molecular pumps have a higher pumping speed when dealing with gas molecules, and can extract gas more quickly. This is especially important for applications that require a vacuum state to be reached quickly, which can significantly improve work efficiency.

4. Better temperature stability:

    Molecular pumps generate less heat during operation and are able to maintain a stable temperature, with temperature changes having little effect on their performance. This stability is particularly important in applications that require precise control of the vacuum level, avoiding performance degradation due to temperature fluctuations. In contrast, diffusion pumps operate at high temperatures and are susceptible to temperature fluctuations, which can reduce pump stability and pumping efficiency. This not only affects the overall performance of the vacuum system, but may also have a negative impact on experimental results. Therefore, molecular pumps are increasingly becoming the first choice in demanding applications due to their superior temperature stability.

5. Easy maintenance and use:

    The molecular pump has a relatively simple structure, low maintenance cost and is more convenient to use. In contrast, the diffusion pump requires regular oil replacement and maintenance, which increases the complexity and cost of operation.Especially during the diffusion pump cleaning process, when heated, sprayed or exposed to high temperature equipment, these solvents will become extremely flammable and explosive, which may cause serious injury or even fatal consequences. Especially during the heating or spraying process, the density of acetone and ethanol is 4 to 5 times heavier than air, which makes it possible for them to flow down to the oil tank, depressions and lower areas, displacing the air and causing a serious risk of suffocation for maintenance personnel.