PVG300 Core Parameters
Product Features
Air Cooling
Air‑cooled design – no external cooling water, simplifies installation, avoids water quality issues. Runs only on electricity, ideal for water‑scarce or poor‑quality water areas.
Dust & Contaminant Tolerant
No internal valves – eliminates valve failure. Gap sealing design tolerates dust, tar, and small particles. Handles dusty gases.
High Ultimate Vacuum
Variable‑pitch rotor profile for smooth meshing and good sealing. Ultimate vacuum down to 3 Pa or lower. Stable operation from atmosphere to ultimate vacuum – wide working range.
Low Maintenance & Energy Saving
Long maintenance intervals (thousands to ten thousand hours). No bearings or seals in pump chamber – low failure rate. Variable‑pitch technology saves ~30% energy. No oil change or disposal cost.
Specifications
| Model | Pumping Speed (m³/h) | Ultimate Vacuum (Pa) | Motor Power (kW) | Motor Options | Inlet Size | Outlet Size | Cooling Method | Lubrication Method | Screw Inner Cavity Coating | Inlet HV Seal | Exhaust LV Seal | Seal Options | Noise (dB) | Weight (kg) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PVG020 | 20 | 3 or 50 | 1.1 | Standard motor / VFD motor / Explosion‑proof motor | KF25 | KF25 | Air‑cooled, 5th generation variable pitch | Synthetic gear oil #46/#48 | Alumina ceramic coating (standard) | Combined seal (lip seal, mechanical seal, gas seal) | Combined seal (lip seal, mechanical seal, gas seal) | Perfluoroelastomer seals available for fluorine‑oil version | 69 | 42 |
| PVG050 | 50 | 3 or 50 | 1.5/2.2 | KF40 | KF25 | 70 | 56 | |||||||
| PVG080 | 80 | 3 or 50 | 2.2/3.0 | KF40 | KF25 | 71 | 65 | |||||||
| PVG200 | 200 | 3 or 50 | 5.5 | KF50 | KF40 | 80 | 160 | |||||||
| PVG300 | 300 | 3 or 50 | 7.5 | KF50 | KF40 | 80 | 190 |
Applications
Puyan screw vacuum pumps are widely used in:
Industrial Production
For electronics, metallurgy, semiconductor – handles water vapor and light dust, delivers clean vacuum.
Food Packaging
Oil‑free vacuum for continuous stretch film packaging, thermoforming – ensures food safety and shelf life.
Medical Equipment
Core of central suction systems – continuous, contamination‑free vacuum for operating rooms and wards.
Laboratory
For freeze drying, analytical instruments, molecular pump backing – completely oil‑free, no wear.
Central Vacuum System
Centralized supply in large plants (electronics, printing, pharma) – significant energy savings vs. distributed pumps.
Chemical & Pharmaceutical
Vacuum distillation, drying, solvent recovery – oil‑free design prevents contamination, meets GMP.