1. Both sides of sealing performance are choiceness and the torque is small.
2. Flow curve tending to straight line. Excellent regulated performance.
3. Flange connection installed easily. Both vertical and horizontal installation are all right.
4. Have multiplicity-sealing materials for user choose.
5. The valves can used for pipe nozzle and have reliable performance.
6. Seat sealing and body are combined very well, and let that have a quit long use lifetime.