Greentech International (Zhangqiu) Co., Ltd.
Greentech Industry (Jinan) Co., Ltd.
When people choose a blower, they often look at the biggest numbers first—higher pressure, higher airflow, more power. But in real projects, those numbers don’t always tell the full story. This is where the 4RB 3AC series ring blower stands out. It may not look extreme on paper, but it works well in real systems and keeps running day after day.
So why do so many engineers come back to this series? The answer is system matching, not just performance data.
The 4RB 3AC ring blower uses either a single-stage or double-stage impeller, depending on the model. This gives users a good balance between pressure and airflow.
Instead of pushing the blower to its limits, this design keeps the load stable. As a result, the blower runs smoother and lasts longer, especially in continuous-duty applications.
At the heart of the system is a 3AC three-phase motor. Compared with single-phase motors, it handles load changes better and runs more steadily.
For plants that operate 24/7, this stable motor performance means fewer shutdowns and less stress on the equipment.
The 4RB 3AC series is often used in applications like:
Pneumatic conveying
Vacuum holding and suction
Aeration systems
Central dust collection
These systems usually need medium pressure and steady airflow, not short bursts of maximum output. This is exactly where the 4RB 3AC performs best.
When a blower matches the system, energy waste goes down. Instead of oversizing the unit, engineers can select a model that fits the real demand. Over time, this improves energy efficiency and lowers operating costs.
Noise is a common concern on site. Thanks to its balanced design and precise machining, the 4RB 3AC ring blower produces less vibration and more stable sound levels.
This makes it easier to install in workshops, packaging lines, and indoor equipment rooms without heavy soundproofing.
The blower housing is usually made from aluminum alloy, which helps release heat quickly. Good cooling protects the motor and bearings, especially during long operating hours.
The compact shape also saves space and simplifies system layout.
Many problems start with oversizing. A blower that is too large often runs inefficiently and wears faster. The 4RB 3AC series offers a wide range of models, making it easier to choose the right one.
When selecting a blower, it’s worth thinking beyond the first startup. A well-matched 4RB 3AC series ring blower delivers stable airflow, predictable maintenance, and long service life.
That’s why many engineers prefer this series—not because it’s the strongest, but because it fits the system.

ring blower product information
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