1.Groove seat ensures precise connection between body ,seat and disc , making seat changing easy , preventng the deforming because of incorrect installment
2.O-ring is inlayed in the shaft hole .While shaft passes the o-ring reaching disc hole , o-ring expand toward to touch body closely, which ensures medium will not reach the space between body and seat causing accident if leakage .
3. Connect of sealing belt with sphere disc prevent increasing the torque when closing the disc . Seat decreasing friction , lowing the torque , extending the life .
4. Middle anti-thrust stem , prevent the frequent shaking of down-side shaft from outside force to low the possibility of taking off .
5.Dome in the seat avoids torque instantly increasing via by seat deforming when incorrect installment . More over , the dome will prevent the impurity off the appearance after a while ,lowing the possibility of seat loosing .
MAIN PARTS MATERIAL
||Ductile iron /ss304/ss316