Vehicle Air Brake Pump
100% oil-free scroll air brake pump for new energy buses, EMUs and metro trains: 2.2-3.7 kW, 1.0 MPa, IP67, compact 29-43 kg design.
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The Hejun vehicle air brake pump is a 100% oil-free scroll compressor developed for new energy buses, EMUs, CRH trains, subways and light rail. It supplies 210-360 L/min of clean, oil-free air at up to 1.0 MPa for braking and auxiliary pneumatic systems, from a compact 29-43 kg package that operates from -40 C to 55 C.
Key features
- 100% oil-free air. No oil aerosol enters the brake circuit, so valves, dryers and air reservoirs stay clean for the whole service life.
- Integrated, lightweight design. 473 x 360 x 314 mm and 29 kg for the 2.2 kW model – easy to mount on a vehicle frame.
- Low noise and low vibration. Scroll compression has no reciprocating parts, so the pump runs smoothly next to the passenger compartment.
- Long maintenance interval. Few wearing parts mean lower workshop cost over the life of the vehicle.
- Built for harsh conditions. IP67 protection and a -40 C to 55 C working range suit both cold-start and hot-engine-bay environments.
- High reliability. Fewer accessories than a screw or piston system, which reduces potential failure points.
Technical specifications
| MODEL NO. | G03ZP | G05ZP |
| Motor Type | IPMSM | IPMSM |
| Power(kW) | 2.2(3) | 3.7 |
| Rated Voltage (V) | AC380 | AC380 |
| Rated Speed (rpm) | 3000 | 3000 |
| Max Pressure (MPa) | 1.0 | 1.0 |
| Capacity (L/min) | 210(1.0MPa) | 360(1.0MPa) |
| Motor Phase Number | 3 | 3 |
| Discharge Temperature (℃) | ＜78 | ＜80 |
| Cooling Method | Forced air cooling | |
| Working Temperature Range (℃) | -40℃~55℃ | |
| Protection Level | IP67 | |
| Dimension (L*W*H)mm | 473*360*314 | 502*400*353 |
| Weight (kg) | 29 | 43 |
Applications
- New energy bus air brake pump and air suspension supply
- Emergency air source / auxiliary pneumatic device
- EMU, CRH train, subway and light rail compressed air supply
- Any vehicle platform that requires oil-free compressed 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
Is the vehicle air brake pump really oil-free?
Yes. The scroll compression chamber is completely oil-free, so the air delivered to the brake circuit contains no oil aerosol and no oil mist carry-over.
Which models are available?
G03ZP at 2.2 kW / 210 L/min and G05ZP at 3.7 kW / 360 L/min, both at 1.0 MPa with AC 380 V three-phase IPMSM motors.
Can Hejun supply a custom voltage or mounting bracket?
Yes. As an OEM manufacturer we can adapt voltage, connector type, mounting points, nameplate and packaging to your vehicle programme.
