1)It is simple structure, showing good performance under low speed, the unit weight power is much higher than other types;

2)Small volume, low weight, the displacement rang from80-800ml/r, wide rotational speed scope;

3)Shaft seal can bear high backpresssure;

4)The output shaft adopts tapered roller bearings that permint high axial and radial forces under short time overloading;

5)There are two forms distributions; With shaft distribution flow or with disc distribution flow in the wide of applications.