PM VFD Dry Oil-Free Screw Vacuum Pump for Industrial Clean Vacuum
Introduction
Intelligent, Clean, and High-Efficiency Vacuum Solutions
The PM VFD Series represents the next generation of oil-free rotary vane vacuum pumps, engineered for industries that demand 100% oil-free air, variable frequency drive (VFD) energy savings, and reliable continuous operation. With its permanent magnet synchronous motor and integrated VFD control, this series delivers precise vacuum pressure regulation while reducing energy consumption by up to 30% compared to standard fixed-speed pumps.
Key Features & Benefits
- 100% Oil-Free Operation – Class 0 certified oil-free compression ensures zero contamination, making it ideal for pharmaceutical, food packaging, medical, and semiconductor applications.
- Integrated VFD (PM Motor) – The built-in permanent magnet motor and frequency converter enable soft start, stepless flow adjustment, and automatic pressure stabilization, extending pump life and lowering noise levels.
- High Efficiency at Any Load – Maintains high pumping speed across a wide pressure range, with intelligent load-following control that matches energy input to actual demand.
- Compact & Modular Design – Space-saving footprint with flexible installation options; multiple frame sizes available to fit your system layout.
- Low Maintenance – No oil changes, no exhaust oil mist, and reduced wear parts result in significantly lower operating costs.
- Quiet & Clean Operation – Low vibration and noise levels improve workplace environment and safety.
Technical Specifications
| Model | Motor Power (kW) | Flow (m³/min) | Flow (m³/h) | Ultimate Vacuum mbar (a) | Inlet Size | Outlet Size | Dimensions (mm) |
|---|---|---|---|---|---|---|---|
| VPO‑5.5PM | 5.5 | 6.4 | 384 | 0.35 | DN80 | DN65 | 120x890x1000 |
| VPO‑7.5PM | 7.5 | 9.2 | 552 | 0.35 | DN80 | DN65 | |
| VPO‑11PM | 11 | 11.5 | 690 | 0.35 | DN80 | DN65 | 1850x920x1420 |
| VPO‑15PM | 15 | 14.6 | 876 | 0.35 | DN80 | DN65 | |
| VPO‑18.5PM | 18.5 | 17.7 | 1062 | 0.35 | DN150 | DN100 | 2000x1000x1600 |
| VPO‑22PM | 22 | 22 | 1320 | 0.35 | DN150 | DN100 | |
| VPO‑30PM | 30 | 27 | 1620 | 0.35 | DN150 | DN100 | 2300x1120x1765 |
| VPO‑37PM | 37 | 30.2 | 1812 | 0.35 | DN150 | DN100 | |
| VPO‑45PM | 45 | 44 | 2640 | 0.35 | DN200 | DN150 | 2860x1650x2050 |
| VPO‑55PM | 55 | 53 | 3180 | 0.35 | DN200 | DN150 | |
| VPO‑75PM | 75 | 75 | 4500 | 0.35 | DN250 | DN200 | 3300x2250x2200 |
| VPO‑90PM | 90 | 90 | 5400 | 0.35 | DN250 | DN200 |
Application
- Central vacuum systems for hospitals and laboratories
- Vacuum conveying and pneumatic transport
- Plastic degassing and extrusion
- Woodworking and CNC hold-down
- Printing and paper handling
- Environmental engineering (aeration, gas recovery)
FAQ
Q1: What does "oil-free" mean for this vacuum pump?
A: The PM VFD Series uses dry rotary vane technology with no oil in the compression chamber. This means the discharged air contains zero oil contaminants, making it suitable for sensitive processes like food, medical, and electronics manufacturing. It also eliminates the cost and hassle of oil changes and oil disposal.
Q2: How does the VFD (Variable Frequency Drive) benefit my operation?
A: The integrated VFD allows the motor speed to adjust automatically based on actual vacuum demand. This provides three main benefits:
- Energy savings – up to 30% lower power consumption compared to fixed-speed pumps
- Precise pressure control – maintains stable vacuum without overshooting
- Softer start/stop – reduces mechanical stress and extends pump service life
Q3: What is the ultimate vacuum level of this series?
A: All models in the PM VFD Series achieve an ultimate vacuum of 0.35 mbar (absolute), which is consistent across the entire power range from 5.5 kW to 90 kW.
Q4: How do I select the right model for my system?
A: Selection depends on your required pumping speed (flow) and operating vacuum level. Use the flow rates in the technical table (m³/min or m³/h) as a guide. For continuous operation, we recommend selecting a model with 15–20% higher flow than your minimum requirement to accommodate system leaks and future expansion. Contact our engineering team for a customized sizing recommendation.
Q5: What maintenance is required?
A: Maintenance is minimal due to the oil-free design. Recommended routine tasks include:
- Inspecting and cleaning the inlet filter (every 1,000–2,000 hours)
- Checking vane wear and replacing as needed (typically after 8,000+ hours)
- Periodic inspection of seals and bearings
No oil changes, oil filters, or oil mist separators are required.
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