The three-piece butt-welded ball valve refers to a valve that the closing part is a sphere, and the ball rotates around the center line of the valve body to open and close. Ball valves are mainly used to cut off, distribute and change the flow direction of the medium in the pipeline. Three-piece ball valve is a new type of valve that is widely used. 

  [Features] 

 1. The fluid resistance is small, and the ball valve is the one with the smallest fluid resistance among all valves. Even if it is a shrinking ball valve, its fluid resistance is quite small. 

 2. The thrust bearing reduces the friction moment of the valve stem, which can make the valve stem operate smoothly and flexibly for a long time. 

 3. The sealing performance of the valve seat is good. The sealing ring is made of polytetrafluoroethylene and other elastic materials. The structure is easy to seal, and the valve sealing capacity of the ball valve increases with the increase of the pressure of the medium. 

 4. The valve stem seal is reliable. Because the valve stem only rotates and does not lift, the packing seal of the valve stem is not easy to destroy, and the sealing ability increases with the pressure of the medium. 

 5. Because polytetrafluoroethylene and other materials have good self-lubrication and small friction loss with the sphere, the service life of the ball valve is long. 

 6. The bottom-mounted valve stem and the convex step of the valve stem head prevent the valve stem from spraying. If the valve stem seal is damaged by fire, metal contact can also be formed between the convex step and the valve body to ensure that the valve stem is sealed. 

 7. Anti-static function: set a spring between the ball, valve stem and valve body, which can export the static electricity generated by the switching process.

Each process, each facility, and each environmental constraint has its own special requirements. Therefore, Dongyan offers a comprehensive range of products covering different performance levels, pressures, different functions and different materials.