Analysis of the Superior Performance and Applications of the Full Range of Diffusion Pump Oils
Nov 26, 2025
In high-end manufacturing and cutting-edge scientific research, the level of vacuum technology is an important benchmark for measuring a country's precision manufacturing capabilities. As the core medium of vacuum diffusion pumps, the performance of diffusion pump oil directly determines the system's ultimate vacuum, stability, and cleanliness. Made in China has now achieved comprehensive technological coverage and large-scale production, from base oils to top-grade synthetic fluids, providing various industries with a full range of high-performance, stable, and reliable solutions.
Mineral Oil: An Economical and Practical Industrial Basic Choice
Source: High-quality petroleum fractions processed using deep refining and molecular distillation processes.
Key Features: Excellent cost advantage, meeting the basic needs of ordinary industrial environments.
Application Scenarios: Suitable for general applications with low vacuum requirements; ultimate vacuum is typically in the range of 10⁻⁴ ~ 10⁻⁵ Pa.
Ester Oils: A Balanced Synthetic Upgrade Option
Source: Organic ester compounds prepared through artificial synthesis processes.
Key Breakthroughs: Compared to mineral oil, it achieves lower saturated vapor pressure and significantly improved thermal stability; ultimate vacuum can reach above 10⁻⁶ Pa.
Applicable Fields: Ideal for industrial applications with high requirements for vacuum and stability.
Silicone Oil: The Mainstream Solution for Ultra-High Vacuum Environments
Source: Advanced synthetic fluid based on polysiloxanes.
Performance Advantages:
Excellent thermal stability, service life far exceeding mineral oils and ester oils.
Extremely low saturated vapor pressure; the DC-705 model can achieve an ultimate vacuum of over 10⁻⁸ Pa.
Good chemical inertness, ensuring long-term stable system operation.
Applications: It has become the preferred choice for most ultra-high vacuum applications, meeting the needs of scientific research and precision manufacturing.
Polyphenylene Ether: The Ultimate Guarantee for Cutting-Edge Technology
Source: High-performance synthetic organic compound, representing the highest level of diffusion pump oil technology.
Top-Tier Characteristics:
Exceptional thermal stability and radiation resistance, adaptable to extreme working environments.
Ultimate vacuum performance comparable to or even surpassing top-tier silicone oils.
Non-silicon-based properties, completely eliminating the risk of silicon contamination.
Core Applications: Strategic material ensuring the success of cutting-edge processes in fields with extremely stringent cleanliness requirements, such as high-end semiconductor manufacturing and molecular beam epitaxy (MBE).
China's diffusion pump oil product line not only achieves comprehensive coverage from 10⁻⁴ Pa to above 10⁻⁸ Pa, but also reaches internationally advanced levels in key performance indicators. Whether it's economical and practical mineral oils or top-grade polyphenylene ethers for the cutting-edge semiconductor industry, Chinese products demonstrate outstanding technical strength and quality assurance.
We are committed to providing the most suitable vacuum solutions for global customers through continuous technological innovation and rigorous quality control. Choosing Chinese-made diffusion pump oil means choosing the perfect combination of reliable performance and superior value, jointly driving Chinese intelligent manufacturing to create new glories in the global vacuum technology field.
