1、 small flow resistance: equal interface of ball body and valve body, arc connected of ball body, when media go across ball body, small flow resistance
2、 sealing performance: valve seat using elastic deformation and high-strength PTFE material, good sealing make stability of valve
3、 long using life: valve spool and light neck material using austenitic stainless steel, valve seat material using PTFE, good function of anti-corrosion, extend using life of valve
