What Is The Fire Protection Structural Design Of Lined Ball Valve?

For Lined Ball Valve requiring fire protection, all areas with seals (gaskets) require fireproof design.
1. Filling must be made of fireproof materials, such as high-temperature-resistant graphite.
2. Sealing gaskets (rings) at the joints between valve body components (such as the left and right valve bodies) must be fireproof.
3. For piston-type valve seats, the seal between the piston outer diameter and the valve body must be made of fireproof materials; rubber or plastic materials must not be used. Furthermore, if the valve seat seal is a soft seal, a metal fireproof blade should be designed around the valve seat near the valve ball. If the soft seal burns out, the valve seat is pushed toward the valve ball by the spring behind it, and the fireproof blade presses against the valve ball, forming a new seal.