1. The valve body is made of high quality material, the ball side mounted, the middle flange and the neck are bolted.

2. There are two sealing structures between the valve seat and the ball: one is the traditional soft sealing structure, the other is the combined sealing structure.

3. the stem is blowout preventer designed to prevent the stem from ejecting from the valve body due to improper operation.

4. Metal hard-sealed O-type fixed ball valve adopts bidirectional metal movable sealing structure, with automatic compensation and self-cleaning function, excellent sealing performance.

5. the fixed ball design is adopted, and the pre tightening spring is added to make the ball valve have the function of automatic pressure relief.

6. sewage outlets and opening, to ensure safe and reliable, easy to use.

7. It has a fire-proof and anti-static structure. A conductive spring is arranged between the valve stem and the valve body and between the valve stem and the ball body to avoid electrostatic sparking and igniting inflammable medium. Ensure system security.

8. Dual protection of refractory structure. In case of fire and seal ring burning, the metal-to-metal hard sealing structure can be formed in each sealing part of the ball valve.

9. Seat seals and stem seals are designed with an emergency grease injection port. Normal sealing does not depend on grease. When the sealing cover is damaged, leakage can be injected into the sealing grease for emergency repair. Each grease injecting orifice is equipped with a grease injection valve and an embedded check valve.