The difference between four-leaf roots and three-leaf roots

The number of impellers is different and the blade structure is different.

1. The four-blade Roots compressor consists of four impellers, while the three-blade Roots compressor has only three impellers.

2. Each impeller of a four-blade Roots compressor is composed of two semicircular blades, while each impeller of a three-blade Roots compressor is composed of two equilateral triangular blades.