Research on the Bidirectional Sealing Performance of a Fixed Ball Valve

In this paper, the bidirectional sealing performance of a fixed ball valve in the closed state is studied through the theoretical calculation and finite element simulation. Based on the theoretical calculation model of sealing performance, the results prove that the sealing structure can ensure the bidirectional sealing performance without leakage. At the same time, the contact at the sealing surface is simulated and calculated using Workbench software. The deformation and contact specific pressure distribution on the entire contact surface are obtained. The results show that the deformation gradually increases from the center of the sealing surface to both sides, and the contact specific pressure gradually decreases from the center of the sealing surface to both sides. Reliable sealing circular-bands are formed at the center of the sealing surface in both directions. By reasonably establishing the model, setting boundaries and loading conditions, the simulation calculations are efficient and can obtain more realistic contact specific pressure distributions.