Oil-free screw vacuum pumps are vacuum acquisition devices that use non-contact screw rotors to achieve dry gas compression.
Features and Advantages
1. Clean and Oil-Free
A core advantage. Minimal clearance between rotors and between the rotor and the pump chamber eliminates
friction and the need for oil seals and lubrication, providing a clean vacuum environment and preventing oil
vapor contamination of process materials.
2. Stable Pumping Speed and High Vacuum
Maintains a stable pumping speed over a wide pressure range (from atmospheric pressure to high vacuum).
A single-stage pump can achieve high ultimate vacuums (typically < 1 Pa or even 0.1 Pa).
3. Corrosion Resistance and Effective Handling of Condensable Gases
Corrosive process gases can be handled by selecting special coatings (such as nickel-phosphorus plating or Teflon)
or corrosion-resistant materials. It exhibits good resistance to condensable vapors (such as water vapor and solvent
vapors), is less prone to liquid slugging, and is an ideal replacement for steam jet pumps.
4. Low Maintenance Costs and Long Service Life
Dry operation eliminates the need for expensive vacuum oil, oil filters, and waste oil disposal costs. Compact
design and long maintenance intervals.
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