PUYON PVG Series Air-cooled Screw Vacuum Pumps

The PVG series offers five models: PVG020, PVG050, PVG080, PVG200, and PVG300, covering pumping speeds of 20‑300 m³/h (50 Hz) with an ultimate vacuum of 3 Pa (or 50 Pa optional). This series features air-cooled oil-free screw design, requiring no cooling water and offering easy installation. It is widely used in chemical, pharmaceutical, vacuum drying, semiconductor, lithium battery, food drying, coating, and other industries. Selection mainly considers three dimensions:

• Required pumping speed and ultimate vacuum: Choose based on your equipment's flow and vacuum requirements. PVG020 (20 m³/h, ultimate 3 or 50 Pa) suits small flow, high vacuum demands; PVG050 (50 m³/h, ultimate 3 or 50 Pa) for small-to-medium flow; PVG080 (80 m³/h, ultimate 3 or 50 Pa) for medium flow; PVG200 (200 m³/h, ultimate 3 or 50 Pa) for larger flow; PVG300 (300 m³/h, ultimate 3 or 50 Pa) for high flow requirements.
• Process media characteristics: The PVG series features oil-free and water-free operation, capable of handling water vapor, dust-laden gases, and condensable gases. The internal chamber comes standard with an aluminum oxide ceramic coating, with optional corrosion-resistant coatings (nickel-phosphorus plating or PTFE spray coating) available for aggressive process environments. Explosion-proof motors can also be specified for hazardous locations.
• Installation conditions: The PVG series features air-cooled design, eliminating the need for cooling water systems. It is easy to install and ideal for locations with limited water supply or where cooling water piping is impractical. Variable frequency motors are available as an option for on-demand air supply and significant energy savings.

Free selection support: Simply provide your equipment type, required pumping speed, ultimate vacuum, and process media characteristics. Royal Crown technicians will provide professional recommendations.

The PVG series is an air-cooled oil-free screw vacuum pump that employs oil-free and water-free operation, delivering completely oil-free exhaust. With high pumping speed and robust stable performance, it is widely used in chemical, pharmaceutical, vacuum drying, semiconductor, lithium battery, food drying, coating, and many other industries. Typical applications include:

• Chemical industry: vacuum distillation, drying, reactor degassing, solvent recovery, etc.
• Pharmaceutical industry: vacuum drying, crystallization, distillation, API production, etc.
• Vacuum drying: supporting large-scale vacuum drying equipment
• Lithium battery: drying of battery materials, vacuum baking, etc.
• Semiconductor and electronics: clean vacuum processes such as coating, etching, and deposition
• Vacuum coating: optical coating, decorative coating, and other coating equipment support
• Food drying: freeze-drying, food dehydration, etc.
• New energy: photovoltaic, fuel cells, and other emerging vacuum applications
• Environmental protection: exhaust gas treatment, VOCs recovery, etc.

With oil-free cleanliness, air-cooled water-free operation, ultimate vacuum of 3 Pa, and the ability to handle water vapor and condensable gases, the PVG series is the ideal choice for industrial applications requiring clean vacuum and easy installation.

The PVG series employs fifth-generation composite variable-pitch screw technology, where two counter-rotating screw rotors synchronously operate inside the pump chamber to achieve gas intake, compression, and discharge through volume changes. The rotors and the pump chamber maintain a small clearance, ensuring contact-free operation with no lubricating oil or working fluid required. Key advantages include:

• Completely oil-free and water-free cleanliness: Dry operation without lubricating oil or working fluid means totally oil-free exhaust, ideal for chemical, pharmaceutical, semiconductor, and other industries with strict cleanliness requirements.
• Ultimate vacuum of 3 Pa: Fifth-generation composite variable-pitch screw technology delivers high ultimate vacuum, meeting medium-to-high vacuum application needs (50 Pa configuration also available).
• Capable of handling water vapor and condensable gases: Specifically designed for processes containing water vapor and condensable gases, with no oil contamination, suitable for distillation, drying, and other similar applications.
• Air-cooled design, no cooling water required: Simply connect to power and start – easy installation. Ideal for locations with limited water supply or where cooling water piping is impractical, significantly reducing installation and operating costs.
• Optional corrosion-resistant treatment: The internal chamber comes standard with an aluminum oxide ceramic coating, with additional nickel-phosphorus plating or PTFE spray coating available for aggressive media such as acidic or alkaline gases.
• Flexible motor configurations: Standard motors are supplied by default, but variable frequency motors or explosion-proof motors can be upgraded as needed. Variable frequency drives enable on-demand air supply and significant energy savings.
• Reliable sealing system: Both inlet and exhaust ends feature combined seals (lip seals, mechanical seals, and gas seals). Fluoroelastomer versions can be upgraded with perfluoroelastomer seals for enhanced chemical resistance.
• Robust and stable performance: Pumping speeds cover 20‑300 m³/h with power ratings of 1.1‑7.5 kW, meeting the flow requirements of various industrial applications.

Compared with water-cooled screw pumps: The PVG series uses air-cooled design, eliminating the need for cooling water systems. It is easier to install and ideal for locations with limited water supply or where cooling water piping is impractical, making it the preferred choice for small-to-medium clean vacuum applications.

The PVG series features a dry screw design with minimal routine maintenance, mainly including the following items:

• Check gearbox oil level and quality: Only the gearbox requires lubricating oil (fully synthetic gear oil #46/#48). Periodically inspect the gearbox oil level and quality, and top up with the specified lubricant as needed.
• Check cooling fan operation: Regularly inspect the air-cooling fan to ensure proper heat dissipation and prevent overheating of the motor and pump body. Recommended every 3‑6 months.
• Inspect seals: Periodically check the shaft seals for leakage and replace if necessary.
• Clean motor and pump body: Regularly clean the motor housing and pump body surfaces to maintain good heat dissipation.

Maintenance costs: Because there is no need to change vacuum pump oil (only gearbox oil), no oil filters, and the non-contact screw rotors experience no wear, the PVG series has much lower maintenance costs than oil-lubricated pumps. The air-cooled design eliminates the need for cooling water systems, further reducing operating and maintenance costs.

Genuine spare parts supply: Royal Crown supplies genuine PUYON maintenance parts (inlet filter elements, gearbox oil, seals, bearings, etc.) as needed. You may also contact Royal Crown's after-sales department for technician guidance or on-site service.

Absolutely. Royal Crown offers custom solutions from single pumps to complete systems. Based on the PVG series air-cooled screw vacuum pump, we can build air-cooled oil-free screw vacuum systems to meet the stringent requirements of high vacuum, corrosion resistance, and clean operation in chemical, pharmaceutical, lithium battery, and other industries.

Customization scope includes, but is not limited to:

• Single-stage screw vacuum systems: A single PVG pump with vacuum tank, filters, valves, and piping to serve single or multiple points of use.
• Roots-screw vacuum systems: ZJP Roots pump + PVG screw pump combination for higher pumping speed and ultimate vacuum, ideal for high-flow, high-vacuum processes.
• Multi-pump parallel systems: Multiple PVG pumps operating in parallel to combine flow, meeting multi-station demand with PLC automatic rotation and constant pressure control.
• One-for-one redundant systems: Main and standby pumps automatically switch for high continuity and reliability, suitable for critical processes that cannot tolerate downtime.
• Corrosion-resistant and explosion-proof configurations: Custom coatings, explosion-proof motors, and other options based on process media characteristics.
• Variable frequency energy-saving upgrades: Optional variable frequency motors for on-demand air supply and significant energy savings.

Just specify your process requirements, and Royal Crown handles the full process from selection, design, assembly, commissioning, to after-sales support.

As the brand owner of PUYON vacuum pumps, Royal Crown supplies the complete PUYON product line. In addition to the PVG series, we offer PV series (single-stage rotary vane), 2XZ series (two-stage rotary vane), ZBW series (oil-free rotary vane), PLG series (water-cooled oil-free screw), POL series (variable frequency oil-lubricated screw), ZJP series (Roots), CVP series (claw), and PSR series (scroll). These cover oil-lubricated and oil-free rotary vane, screw, Roots, claw, and scroll technologies, satisfying requirements from rough to high vacuum, small to large flow, lubricated to clean, and standard to corrosive/explosion-proof applications. If the PVG series doesn't meet your specific needs, please contact us and we will recommend the most suitable PUYON model.

Quality assurance: PUYON is Royal Crown's own brand. From R&D, raw material sourcing, manufacturing to final inspection, all processes are strictly controlled in-house, ensuring consistent quality. Royal Crown has comprehensive quality control systems and testing methods, eliminating risks from distribution channels and ensuring full traceability.

Lead time: The PVG series air-cooled screw pumps are not standard stock items; availability depends on specific model, specifications, and configuration. Please contact us directly for lead time confirmation.

After-sales service: We offer a 12-month warranty (from shipment). Any faults due to product quality within the warranty period are repaired or replaced free of charge. As the factory direct source, our technical team provides long-term support and maintenance services with faster response and more timely assistance.