PM Synchronous Motor Air End 1.1KW
Compact 1.1 kW PM scroll air end: 260 L/min at 2.0 bar, below 56 dB, only 12 kg – for vehicle oxygen systems and compact oil-free air units.
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A compact 1.1 kW oil-free scroll air end with the permanent magnet motor mounted directly on the main shaft – no spline, no coupling. At 350 x 243 x 243 mm and 12 kg it delivers 260 L/min at 2.0 bar while running below 56 dB, which makes it suitable for vehicle oxygen systems, dental and laboratory units, and any application where a small, silent, oil-free air source is required.
Key features
- Very compact. 350 x 243 x 243 mm, 12 kg – the smallest air end in the Hejun range.
- Quiet. Below 56 dB(A), suitable for installation close to operators, in clinics or inside a vehicle.
- Direct-drive PM motor. Mounted on the main shaft without couplings, which removes alignment error and wear.
- Oil-free scroll element. Clean air for oxygen systems where any oil trace is unacceptable.
- Wide working range. Rated for -20 C to 50 C ambient, air-cooled with an axial fan.
- Long maintenance interval. Few moving parts and no oil to change.
Technical specifications
| MODEL NO. | G09ZP |
| Capacity (L/min) | 260 |
| Pressure (barg) | 2.0 |
| Rated Speed (rpm) | 1500 |
| Rated Power (kW) | 1.1 |
| Rated Voltage (V) | AC220/380 |
| Air Intake Size | G3/4 |
| Air Outlet Size | G1/2 |
| Noise (dB(A)) | <56 |
| Working Medium | air |
| Working Condition | ‘-20℃–50℃ |
| Cooling Method | AC 220V AXIAL FLOW FAN |
| Outer Dimension (mm) | 350*243*243 |
| Weight (kg) | 12 |
The air end requires an external inverter for speed control. Rated at 2.0 barg; other pressures can be discussed for OEM projects.
Applications
- Vehicle oxygen generation and oxygen concentration systems
- Dental clinic and small laboratory oil-free air supply
- Compact air modules inside analytical or medical equipment
- Sample preparation and instrument air
Why buy from Hejun
- 100% oil-free, Class 0 air. Scroll compression with no oil in the air path, verified to ISO 8573-1 Class 0 by TÜV Rheinland.
- Manufacturer, not a trader. 80+ patents, 30+ engineers and an in-house test centre in Zhejiang, China.
- OEM / ODM ready. Custom voltage, pressure, colour, logo, packaging and nameplate for distributors and equipment builders.
- Every unit tested three times before shipment: pre-run, teardown inspection and performance test.
- Fast response. Quotation within 24 hours, English-speaking export team, worldwide shipping.
Product detail images



Frequently asked questions
Does the air end include an inverter?
No. The permanent magnet motor needs a matching inverter, which can be supplied together with the air end on request.
Can it be used for oxygen?
Yes. The compression chamber is oil-free, which is why this air end is used in vehicle and medical oxygen systems. Oxygen-compatible materials and cleaning are specified for oxygen service.
What is the noise level?
Below 56 dB(A) at rated speed, measured at one metre.
