The two-stage oil-free
Screw Vacuum Pump is an advanced vacuum device that achieves efficient gas pumping and compression through the precise alignment of two screw rotors, which rotate in opposite directions without contact, creating periodic volume changes. Its core breakthrough lies in completely eliminating oil lubrication. Leveraging micron-level precision meshing between the screws and the self-lubricating properties of the material, it achieves an oil-free process. Combined with a two-stage gradient compression and intelligent temperature control, it combines high vacuum performance with excellent media adaptability.
Not only can this device achieve an ultimate vacuum exceeding 0.1 Pa, it also sets new standards in energy efficiency, stability, and environmental compatibility. Measured energy savings exceed 50%, noise and vibration are significantly reduced, and it can handle complex operating conditions including corrosive gases, condensable vapors, and trace dust.
It has become an irreplaceable core piece of equipment in the following key industries precisely because it addresses the typical pain points of traditional vacuum solutions:
Semiconductor manufacturing: Used in critical processes such as wafer coating, etching, and ion implantation. These processes are extremely sensitive to hydrocarbon contamination and often utilize corrosive gases. The dual-stage oil-free structure fundamentally eliminates oil vapor backflow, and the high corrosion resistance of the material ensures long-term stable operation, maintaining wafer processing yield and equipment uptime.
Pharmaceutical and Biotechnology: In processes such as freeze-drying, solvent purification, and aseptic filling, traditional oil pumps can pose a risk of drug contamination and impact process certification. This pump provides a completely clean vacuum environment, supporting GMP compliance, while efficiently handling condensable solvent vapors and preventing pump cavity clogging and cross-contamination.
Food Packaging and Processing: Suitable for vacuum packaging, degassing, and conditioning. The oil-free design eliminates grease contamination of food contents, and the high-speed pumping capacity matches the pace of automated production lines, improving efficiency while ensuring food safety.
New Energy Battery Manufacturing: When recovering corrosive solvents such as NMP, conventional vacuum pumps are prone to corrosion failure and solvent retention. This pump, with its all-stainless steel construction and anti-condensation design, provides reliable media handling and a longer service life, reducing battery manufacturing costs.
Chemical and Environmental Engineering: Suitable for fine chemical synthesis and waste gas recovery (VOCs). Aggregate, corrosive, or flammable and explosive gases are common in systems. This device provides an oil-free, explosion-proof, and safe environment. Gradient compression reduces temperature peaks, thereby reducing reaction risks and equipment failure rates.
Research and experimental institutions: Synchrotron radiation, electron microscopes, and high-precision analytical instruments require clean, low-vibration, and stable vacuum systems. This pump, with its oil-free operation, low noise levels, and stable ultimate vacuum performance, ensures an undisturbed experimental environment and ensures data accuracy.
The two-stage oil-free screw
Vacuum Pump not only redefines the standard for clean vacuum, but also, with its system reliability, media adaptability, and significant energy savings, has become a key enabler for improving efficiency and reducing total costs in high-end manufacturing, green technology, and critical process environments. Its widespread use represents an inevitable trend in the industryx27s transition to a high-efficiency, low-carbon, and refined operating model.
Q1. What is an oil-free vacuum pump and how does it work? +
It is a vacuum pump that operates without any oil in the compression chamber — using dry rotary vanes, pistons or diaphragm mechanisms with self-lubricating materials. There is no oil to change, no oil mist in the exhaust and no risk of oil contamination of your process or product, making it the clean, low-maintenance choice for sensitive applications.
Q2. Which applications is it used for? +
Typical duties include medical equipment (suction, dental chairs, analyzers), laboratories and analyzers, food vacuum packaging, electronics and PCB manufacturing, printing and paper handling, vacuum pick-and-place, packaging lines, environmental monitoring, and cleanroom-adjacent processes where oil contamination is unacceptable.
Q3. What ultimate vacuum can it achieve? +
Dry vane designs typically reach about 5–10 mbar, piston types 30–100 mbar and diaphragm pumps similar ranges, depending on the model. This covers most packaging, pick-and-place and suction applications. If your process requires deeper vacuum (below a few mbar), we can recommend an oil-sealed or dry screw solution. Two-stage dry screw pumps typically reach an ultimate pressure of about 0.1–0.5 mbar (10–50 Pa), covering most industrial processes. Combined with a roots booster, levels below 0.01 mbar can be achieved where required.
Q4. What pumping speed ranges do you offer? +
Our oil-free units cover pumping speeds from about 1 to 120 m³/h, from compact medical-grade pumps to larger industrial packaging units. Provide your chamber volume, required vacuum level and cycle time, and we will size the optimum model.
Q5. Why choose oil-free instead of an oil-sealed pump? +
Oil-free pumps eliminate oil changes, oil disposal, exhaust oil mist and the risk of oil back-streaming into your process. They are safer for medical, food and cleanroom use, run cleaner and cost less to maintain — at the price of a slightly higher initial cost and somewhat higher ultimate vacuum limit.
Q6. What maintenance does it require? +
Very little. There is no oil to change; routine work is limited to cleaning or replacing the intake filter, checking valves and hoses, and periodic inspection of the drive and vanes/diaphragm. A simple annual service keeps the pump running reliably for years.
Q7. Is the exhaust clean? +
Yes. With no oil in the system, the exhaust contains no oil mist and minimal contaminants. Optional exhaust filters and silencers further reduce particles and noise, making it suitable for laboratories and clean production areas.
Q8. How noisy is it? +
Our oil-free pumps are designed for quiet operation — typically 50–68 dB(A) depending on model — with balanced mechanics and optional acoustic enclosures for noise-sensitive sites such as clinics and labs.
Q9. Can it run continuously? +
Yes. The pumps are rated for continuous duty at their specified performance, with adequate cooling and thermal protection. For demanding 24/7 packaging lines we recommend models with duty-rated motors and monitoring options.
The purchase price is slightly higher than an equivalent oil pump, but total cost of ownership is often lower: no oil purchases or changes, no filter oil disposal, less maintenance labor and no contamination-related product loss. We can provide a lifetime cost comparison for your specific duty.
Q11. What are the installation requirements? +
Place the pump on a level surface with ventilation, connect the suction line (short, large-diameter for best performance) and provide the correct motor supply. Many models are compact and can be mounted directly on machinery or in a cabinet. Accessories include inlet filters, vacuum gauges and regulators.
Q12. Can it handle humidity or particulates? +
Dry pumps handle light moisture well; for humid or dusty processes we recommend an inlet filter and, where needed, a separator upstream to protect the pumping chamber. Confirm your media with us and we will configure the right protection package.
Q13. Do you offer medical-grade or certified versions? +
Yes. We supply versions with appropriate materials and performance for medical and food-contact duties, and we can provide certification documentation required for your market. Confirm your application and applicable standards, and we will match the right configuration.
Q14. Do you support customization and OEM/ODM? +
Yes. As the manufacturer, we customize voltage/frequency (e.g. 110V/220V/380V, 50/60Hz), motor options, accessories and packages, color and branding, plus OEM/ODM with your logo and documentation.
Q15. What certifications do you hold and what is the lead time? +
Our factory is ISO 9001 certified and pumps carry CE certification, with other certificates available for your market. Standard models ship within 7–20 days after order confirmation, customized units 20–40 days, export-packed for sea or air freight.
Q16. What warranty and after-sales support do you provide? +
We offer a 12–24 month warranty, 24/7 remote technical support, installation guidance and operator training, and long-term spare parts supply — filters, valves, vanes and service kits — typically dispatched within 3–7 days to keep your line running.
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