High Temperature Forged Triple offset Butterfly Valve
Triple eccentric butterfly valve is widely used in metallurgical, electric power,petrochemical, water supply and drainage, municipal construction and other industrial pipelines with medium temperature ≤ 425 ℃ for regulating flow and carrying off fluid. The material is divided into: cast iron, cast steel and stainless steel.
Today, DBV launches forged triple eccentric butterfly valve with radiator:
1. High temperature forged triple offset butterfly valve in Class 1500 must be resistant to high temperature and must be hard sealed, but the leakage is large; To achieve zero leakage, a soft seal must be used, but it is not resistant to high temperature. In order to overcome the contradiction of double eccentric butterfly valve, the butterfly valve is eccentric for the third time.
2. The utility model is characterized in that the conical axis of the sealing surface of the butterfly plate deviates from the cylindrical axis of the body while the double eccentric valve rod axis position is eccentric, that is, after the third eccentricity, the sealing section of the butterfly plate is no longer true circle, but ellipse, and the shape of the sealing surface is asymmetric, one side is inclined to the center of the body and the other side is parallel to the center of the body.
3. The biggest feature of this third eccentricity is that it fundamentally changes the sealing structure, no longer the position seal, but the torque seal, that is, it does not rely on the elastic deformation of the valve seat, but completely depends on the contact surface pressure of the valve seat to achieve the sealing effect. Therefore, the problem of zero leakage of the metal valve seat is solved in one fell swoop.
Through the continuous updating and efforts of DBV company,development of three eccentric butterfly valve since its inception, in order to meet the increasingly severe working conditions, the three eccentric butterfly valve itself has also experienced the process of self-improvement and continuous development. Even the most basic zero leakage and three eccentric butterfly valve can be achieved in theory, but in fact, it still depends on careful design and precise manufacturing.