The Improvement of Large Butterfly Valve by Using Numerical Analysis Method

Nowadays, numerical analysis becames more and more popular in designing large butterfly valve. In this paper, fluid structure interface(FSI) analysis is carried out to estimate fluid field and performance of large butterfly valve in diameter of 2.2m. A three-dimensional model of butterfly valve IS used to do simulation perfectly. The FSI analysis not only analyzes the fluid field at various valve openings, but also verifies whether the valve can work safely under serious conditions or not. The result shows this type valve is not safe when valve is opened at 15 degree or when valve is closed. To ensure that the valve can work safely, the improvement of this type valve is carried out. And some important dimensions of valve components are chosen to be assembled in different values. And the analyzed results of different assemblages are compared to determine the best one which can strengthen the structure and reduce the weight of valve mostly furthest.