Air Compressors
SJ Series Permanent Magnet VSD Screw Air Compressor
| Product | SJ Series Permanent Magnet VSD Screw Air Compressor | ||
| Category | Air Compressors | ||
| Description | The SJ series permanent magnet VSD screw air compressor uses a large-diameter, low-speed compressor block. The large rotor diameter with low speed seals and accommodates air better during compression; combined with precision machining, dynamic balance testing and heavy-duty bearings, it delivers higher efficiency, lower noise and longer life. It features constant pressure supply (PID regulation, ±0.1bar fluctuation), zero-load start, and separated low/high temperature zones for longer electrical component life, plus a friendly HMI with comprehensive data and powerful functions. The cooling system designed for Asia's hot, humid regions boosts heat exchange by over 10% and works up to 48°C. Models from SJ-10 to SJ-250 deliver 1.2–32 m³/min displacement, 7.5–185 kW power and noise as low as 66 dB(A), suitable for continuous and fluctuating operation. | ||
| SJ-10 | 1.2/0.7 | 7.5 | 66±2 |
| SJ-15 | 1.65/0.7 | 11 | 68±2 |
| SJ-25 | 3.2/0.7 | 18.5 | 68±2 |
| SJ-40 | 5.3/0.7 | 30 | 72±2 |
| SJ-50 | 6.8/0.7 | 37 | 72±2 |
| SJ-75 | 10/0.7 | 55 | 72±2 |
| SJ-100 | 13.4/0.7 | 75 | 72±2 |
| SJ-150 | 21/0.7 | 110 | 75±2 |
| SJ-250 | 32/0.7 | 185 | 82±2 |
Key Features
- Large-diameter low-speed host: better sealing, less leakage, higher efficiency
- Constant pressure: PID regulation, ±0.1bar fluctuation
- Zero-load start: minimal grid impact
- Efficient cooling: 10%+ more heat exchange, works to 48°C
- Intelligent control: self-diagnosis, protection, interlock, remote monitoring
- Low noise: as low as 66 dB(A) for workshop environments
Applications
- Factory centralized air supply and energy retrofits
- Continuous and fluctuating load conditions
- Noise-sensitive workshops
- Automated production lines needing remote monitoring
FAQ
Q1: What energy-saving designs does SJ have?
Large-diameter low-speed host + permanent magnet VSD + PID constant pressure — saving 20–30% under fluctuating loads.
Q2: How much pressure fluctuation?
Constant pressure supply within ±0.1bar.
Q3: Does it support remote monitoring?
Yes — multi-unit interlock and remote monitoring are built in.
Q4: What models are available?
SJ-10 to SJ-250, 1.2–32 m³/min, 7.5–185 kW.
Technical Specifications
| Model | Displacement m³/min (0.7MPa) | Power (kW) | Noise dB(A) |
|---|---|---|---|
| SJ-10A | 1.2 | 7.5 | 66+-2 |
| SJ-30A | 3.8 | 22 | 72+-2 |
| SJ-75A | 10 | 55 | 72+-2 |
| SJ-10 | 1.2/0.7 | 7.5 | 66±2 |
| SJ-15 | 1.65/0.7 | 11 | 68±2 |
| SJ-25 | 3.2/0.7 | 18.5 | 68±2 |
| SJ-40 | 5.3/0.7 | 30 | 72±2 |
| SJ-50 | 6.8/0.7 | 37 | 72±2 |
| SJ-75 | 10/0.7 | 55 | 72±2 |
| SJ-100 | 13.4/0.7 | 75 | 72±2 |
| SJ-150 | 21/0.7 | 110 | 75±2 |
| SJ-250 | 32/0.7 | 185 | 82±2 |
* Parameters are for reference only; the actual product prevails. Custom specifications are available on request.
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Zhejiang Jiayi Fan Co., Ltd. — professional ventilation and air compressor manufacturer since 2003, exporting to 50+ countries. Send us your requirement for a full catalog and quotation.