1. Step-less speed regulation. Control the compressed air by control the intake valve. Thus the air motor power and the rotational speed can be adjusted.

2. Safe and reliable. It is not affected by vibration, high temperature, electromagnetic, radiation, and other conditions. So it is suitable to work under flammable, explosive, water-spraying, high-dust conditions etc. in harsh conditions.

3. With overload protection. It will not mal-function due to overload. The temperature rise is small after long time operation.

4. High starting torque. It can be started directly with a load and stops quickly.

5. Simple structure, light-weight. Small size, high horsepower, easy operation and maintenance.

6. Environmental. The medium is air, and the exhausted air do not have pollution. It is environmental protection. The air can be concentrated supply and long-distance delivery.

7. Fast delivery. Spare parts are readily available