Double permanent magnet motor integrated two-stage compression series
Overview
The OSG ETZV Series Dual Permanent Magnet Integrated Two-Stage Compression Compressors represent a breakthrough in air compression technology. Unlike conventional designs that rely on gears or couplings between stages, the ETZV series features two independent permanent magnet motors, two air ends, and two dedicated inverters – all integrated into a single, compact unit. This unique architecture delivers 100% transmission efficiency, eliminates common failure points (gears, couplings, and motor bearings), and achieves significant energy savings through true stepless speed control. Available from 37kW to 200kW, the ETZV series is the ideal choice for industries demanding maximum efficiency, reliability, and quiet operation.
Key Advantages
1. More Stable – Fewer Failure Points
| Eliminated Component | Traditional Problem | ETZV Solution |
|---|---|---|
| Gears | Wear, breakage, lubrication required | No gears – eliminated |
| Couplings | Misalignment, cracking, vibration | No couplings – eliminated |
| Motor Bearings | Fatigue, failure, noise | Integrated shaft – eliminated |
Result: Significantly higher reliability and longer service life.
2. More Energy Efficient – Stepless Speed Control
| Feature | Benefit |
|---|---|
| Dual PM motors + dual inverters | Independent speed control for each stage |
| Stepless speed variation | Matches air demand precisely – no waste |
| 100% transmission efficiency | No gear losses, no coupling losses |
| Inter-stage pressure adjustable | Optimize pressure ratio for maximum efficiency |
| Always runs at most energy-saving speed | Minimizes specific power consumption |
Energy savings vs. single-stage: 20%~30%
3. More Efficient – IE3 Premium Motors
- High-efficiency permanent magnet motors: IE3 rating
- 100% transmission efficiency: Integrated shaft structure – direct drive
- Two air ends + two motors + two inverters: Each stage operates at optimal speed
4. More Comfortable – Low Noise Operation
| Noise Source | Traditional | ETZV Series |
|---|---|---|
| Gear meshing | ✓ | ✗ Eliminated |
| Coupling transmission | ✓ | ✗ Eliminated |
| Motor bearings | ✓ | ✗ Eliminated |
Result: A quieter, more comfortable working environment.
5. More Compact – Space-Saving Design
- Integral structure – two stages in one compact package
- Separate air intake – reduces cooler load
- Independent installation panel – dual-frequency PLC controller
- Removable dust cover – easy cleaning
- Exhaust fixed pipe clamp – prevents gas shock
Technical Specifications (ETZV Series)
| Parameter | ETZV-37A | ETZV-45A | ETZV-55A | ETZV-75A | ETZV-90A | ETZV-110A | ETZV-132A | ETZV-160A | ETZV-200A |
|---|---|---|---|---|---|---|---|---|---|
| Power (kW/HP) | 37/50 | 45/60 | 55/75 | 75/100 | 90/120 | 110/150 | 132/175 | 160/215 | 200/270 |
| Air Flow / Pressure (m³/min/MPa) | |||||||||
| 0.6 MPa | 7.91 | 10.5 | 13.55 | 16.19 | 22.68 | 24.92 | 30.65 | 37.2 | 43.89 |
| 0.7 MPa | 8.25 | 10.2 | 13.1 | 16.11 | 21.02 | 25.29 | 29.28 | 35.25 | 41.59 |
| 0.8 MPa | 7.67 | 10.02 | 12.31 | 15.35 | 19.81 | 24.01 | 27.61 | 33.82 | 40.03 |
| 1.0 MPa | 6.55 | 9.24 | 11.15 | 13.47 | 18.08 | 20.31 | 24.53 | 30.59 | 34.47 |
| Dimensions (L×W×H mm) | 2200×1400×1355 | 2200×1400×1355 | 2400×1400×1600 | 2400×1400×1600 | 2120×1600×1680 | 2120×1600×1680 | 2900×1800×1900 | 2900×1800×1900 | 3200×2000×2100 |
| Weight (kg) | 1800 | 1900 | 2350 | 2650 | 3100 | 3380 | 3600 | 3750 | 4150 |
| Outlet Size | RP1-1/4" | RP2" | RP2" | RP2" | DN65 | DN65 | DN80 | DN80 | DN100 |
General Specifications:
- Voltage: 380V / 3PH / 50Hz (customizable)
- Drive method: Integrated shaft – 100% direct drive
- Start method: VSD start (dual inverters)
- Oil content: ≤ 3 PPM
- Cooling: Air-cooled (A)
Applications
| Industry | Application |
|---|---|
| Mining & Metallurgy | Ventilation, material conveying, pneumatic drilling |
| Chemical Processing | Process air, instrumentation, valve actuation |
| Automotive Manufacturing | Assembly lines, spray booths, robotics |
| Electronics & Semiconductors | Clean, constant pressure air for precision production |
| Food & Beverage | Processing, packaging, cleaning |
| Pharmaceutical | Fermentation, drying, laboratory air |
| Textile | Air-jet looms, spinning, dyeing equipment |
| Energy & Power | Plant air, control systems |
Quality Assurance
- Machinery Test Report: Provided
- Video Outgoing-Inspection: Provided
- Warranty: 1 Year
- Condition: 100% New
Frequently Asked Questions
Q1: What makes ETZV different from traditional two-stage?
Two independent PM motors, two inverters, and integrated shaft design – no gears, no couplings, no motor bearings. 100% transmission efficiency.
Q2: How much energy can I save?
20–30% vs. single-stage compressors.
Q3: What is the transmission efficiency?
100% – integrated shaft with no intermediate mechanical components.
Q4: Is it noisy?
No. Gears, couplings, and motor bearings – all eliminated – significantly reducing noise.
Q5: What power supply is required?
Standard: 380V/3PH/50Hz. Other voltages available upon request.
Q6: What is the oil content in discharge air?
≤ 3 PPM.
Q7: What is the advantage of dual inverters?
Each stage has independent speed control, allowing precise inter-stage pressure adjustment for maximum efficiency.
Q8: How does the design improve reliability?
With gears, couplings, and motor bearings eliminated, failure points are drastically reduced.
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