Wedge Gate Valves Selected during Technological Pipeline Systems Designing Service Life Assessment

Experimental analysis of the effect of sealing surface pitting defects on valve sealing performance

“…The sealing surface showed a little elastic deformation as a result of repeated thermal expansion and contraction because the coefficient of thermal expansion of the sealing surface material and the base material of the valve plate were not equal [8,14]. A considerable leakage rises because the sealing surface is somewhat distorted and the overall flatness decreases [15][16][17]. As a result, the plate sealing surface and seat sealing surface are less effective.…”

Flow Characteristics and Stress Analysis of a Parallel Gate Valve

“…The computational fluid dynamics method is used to investigate the flow and loss characteristics under different Reynolds number and different groove depth. Moreover, the structural stress analysis where the valve failure might occur is also done while using a numerical method that is proven by the previous studies [27][28][29][30][31]. This work is helpful for the understanding of the flow characteristics of the gate valve and the judgment of the reason for valve failure in the future.…”

“…Long and Shurong [20] numerically investigated the flow and temperature distributions in the stem gate valve while using axisymmetric models, and Hu et al [21] performed experiments and numerical simulations to study the temperature and the convection heat transfer coefficient distributions in a gate valve. In the meantime, there are also works regarding structure optimization [22,23], the corrosion erosion distributions [24][25][26], and the stress analysis [27][28][29]. Kolesnikov and Tikhonov [22] focused on the conicity of the output channel of the wedge gate valve and Xu et al [23] focused on the seal and piston of a subsea gate valve.…”

“…As for the stress analysis, Liao et al [27] found that the fatigue of the inlet valve sleeve resulting from collision stress was the main reason for the valve failure. Zakirnichnaya and Kulsharipov [28] analyzed the stress-strain of the wedge gate valves while using fluid-structure interaction technology and they found that the safe operation resources value of the wedge is lower than the valve body. Punitharani et al [29] applied the finite element analysis (FEA) method to evaluate the residual stresses in a gate valve, and they found that there were large tensile and compressive residual stresses on the circular bead of the gate valve.…”