A single-stage oil-free
Screw Vacuum Pump is a vacuum equipment that adopts the principle of screw air compression. Its core components are two counter rotating screws that achieve gas compression through meshing motion, without the need for lubricating oil throughout the process, ensuring a highly clean output gas. This pump has the advantages of being clean and pollution-free (avoiding oil vapor reflux), energy-saving and efficient (with a volumetric efficiency of over 85%, which is 20-30% more energy-efficient than traditional pumps), stable and reliable (non-contact operation, with an average time between failures of over 20000 hours), and easy to maintain (only requiring regular replacement of the intake filter) and complying with environmental regulations. Its working pressure range is wide (10Pa to 1000hPa), and it can be directly started from atmospheric pressure. Typical applications include vacuum mounting and plastic packaging in the semiconductor industry, packaging of electronic components for new energy vehicles, vacuum sealing in food processing, and other fields that require strict cleanliness and stability.
The single-stage oil-free screw
Vacuum Pump adopts the screw compression principle to achieve clean and oil-free operation (completely avoiding lubricating oil pollution, with an output gas purity of over 99.9%), and has high efficiency and energy-saving characteristics (with a volumetric efficiency of over 85% and energy consumption reduced by 20-30% compared to traditional oil lubrication pumps). At the same time, it achieves an ultra long service life (with an average trouble free operation time of over 20000 hours) through non-contact screw design, and has extremely low maintenance costs (only requiring regular replacement of the intake filter). Its wide pressure range (10Pa to 1000hPa) supports direct start-up from atmospheric pressure and meets strict environmental regulations, making it particularly suitable for industrial scenarios such as semiconductors and food packaging that require extremely high purity and reliability.
Single stage oil-free screw vacuum pumps are widely used in fields with strict requirements for gas purity and process reliability due to their clean, oil-free, efficient, and stable characteristics. They are used in semiconductor manufacturing for vacuum environment construction in wafer mounting and plastic packaging processes; Vacuum degassing for battery pack packaging and motor insulation treatment in the field of new energy vehicles; Realize high-speed aseptic sealing in the food packaging process; Simultaneously covering scenarios such as medical equipment (such as vacuum drying sterilization), photovoltaic industry (lamination process), and scientific research instruments (electron microscope vacuum system), effectively avoiding oil pollution risks and meeting continuous operation requirements.
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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