1. Labor-saving operation: The ball is supported by upper and lower bearings, which reduces friction and eliminates excessive torque caused by the huge sealing load formed by the inlet pressure to push the ball and the sealing seat.

2. Reliable sealing performance: PTFE elastic material sealing ring embedded in the stainless steel seat, metal seat at the end of no spring, to ensure sufficient pretightening of the sealing ring, the valve in the process of use sealing surface friction and wear, under the action of the spring valve to ensure good sealing performance.

3. The fireproof structure: to prevent because of heat or fire, make ptfe sealing ring burned, larger leakage occurs, and feeds the fire, set fire prevention sealing ring between the sphere and valve seat, burned down in sealing ring, in under the action of spring force, will seat ring is rapidly to the sphere, form the metal to metal seal, have a certain degree of sealing effect. Fire resistance test conforms to API6FA and API607 standards.

4. Automatic pressure relief function: when the pressure of the stagnant medium in the valve chamber abnormally rises beyond the preload of the spring, the seat will retreat from the sphere to achieve the effect of automatic pressure relief, and the seat will automatically reset after pressure relief.