Alpha Imported Screw Blowers
Oil-free Screw Blower
Adopting advanced internal compression technology. Through the precision meshing of Yin and Yang rotors, air is compressed adiabatically inside the body, realizing an energy efficiency of more than 35% higher than that of traditional Roots fans. Oil-free design, pure air output, suitable for harsh industrial environments.
Demonstration of the working principle of internal compression
Side-view profile demonstration: Yin and Yang rotors engage at high speed to push the inhaled air along the axial direction. In the process, the closed volume is gradually reduced, the gas is compressed and pressurized, and discharged from the exhaust end.
1. Axial air intake
Air fills the rotor grooves. As the rotor rotates, the inlet end closes and the gas is trapped in the grooves.
2. Adiabatic compression
The rotor continues to rotate and the toothed volume moves axially and gradually shrinks. The gas volume is compressed, the pressure rises and the temperature increases.
3. High-pressure exhaust
When the compressed gas moves to the exhaust port position, it is continuously discharged. The gas flow is smooth and pulsation-free.
Technical Advantages of Alpha Screw Fans
Ultimate Energy Efficiency
Energy saving 30%~50% in real working conditions compared to conventional Roots fans. energy loss due to exhaust backflow is reduced by internal compression.
Class 0 Oil-free
The unique labyrinth type non-contact seal design ensures that the compression chamber is completely free of oil and outputs 100% pure air, which meets the ISO 8573 standard.
Teflon coating
The rotor surface is coated with Teflon anti-corrosion and wear-resistant coating, which not only prolongs the service life, but also maintains long-lasting gap sealing and ensures that the efficiency does not deteriorate.
Mainframe Structure Details
Rotors
Core components. High-precision machined 3:5 toothed rotor with Teflon coating and low clearance.
Timing Gears
Precision synchronized gears ensure that the yin and yang rotors do not contact each other, smooth operation and low noise.
Bearings & Seals
Heavy-duty roller bearings withstand high-pressure loads; labyrinth seals and carbon ring seals ensure oil-free gas chambers.
Selection Parameter List (AFS Series)
| Model | Exhaust pressure (bar g) | Speed (rpm) | Flow rate (m³/min) | Shaft power (kW) | Specific power kW/(m³/min) |
|---|---|---|---|---|---|
| AFS2205C | 0.6 | 8000 | 12.1 | 12.9 | 1.06 |
| AFS2205C | 1.0 | 8000 | 11.8 | 19.5 | 1.65 |
| AFS2208A | 0.6 | 4300 | 51.3 | 56.0 | 1.09 |
| AFS2208A | 1.0 | 4300 | 50.9 | 78.3 | 1.54 |
| AFS2212A | 0.6 | 3800 | 82.4 | 91.6 | 1.11 |
| AFS2212A | 1.0 | 3800 | 81.5 | 136.9 | 1.68 |
| AFS2212AFL | 1.2 | 3800 | 81.3 | 152.0 | 1.87 |
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