1. The four-way ball valve adopts the integrated structure in structure, the sealing type of four side valve seat, fewer flange connections, high reliability, and lightweight design.

2. The four-way ball core is divided into T-shaped and L-shaped, with long service life, large flow capacity and small resistance.

3. The ball valve can be divided into single acting and double acting types according to the action type. The single acting type is characterized by that once the power source fails, the ball valve will be in the state required by the control system.