The performance advantage of the fixed ball valve:

1, the operation is labor-saving: ball support, composed of upper and lower bearings to reduce friction, due to the elimination of the great seal load inlet pressure to promote the ball with the sealing seat formation caused by excessive torque.
2, reliable sealing performance: PTFE unisexual material sealing ring is embedded in the stainless steel Instrument needle valve seat, metal seat end with the spring to ensure adequate pre tightening force of sealing ring, valve sealing surface is abraded during use, in the spring under the action of the valve to ensure good sealing performance.
3, structural fire protection: to prevent the sudden appearance of heat or fire, burn the PTFE sealing ring, large leak occurred, and contribute to the fire, in the ball and Trunnion ball valve seat sealing ring is arranged between the fire, when burned in the ring, under the action of the spring force, will quickly push the ball valve seat sealing ring, the formation of metal and metal seal, to a certain degree of sealing effect. Fire test to meet the requirements of APl6FA and APl607 standard.
4, automatic pressure relief feature: when the medium pressure cavity inside the valve is much higher than the pre] spring force, the seat back from the ball, to the effect of automatic pressure relief, pressure relief valve seat after automatic complex
5, a drain line: all set vent valve body, valve seat can check whether leakage occurs in the work, the valve is fully open or fully closed, remove the pressure in the chamber, can be directly replace packing; can cavity left in emissions, reduce pollution medium on the valve.