• Title/Summary/Keyword: Trunnion Ball Valve

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Stress Analysis of a Trunnion Ball Valve for Ball Weight Reduction (이축 볼밸브의 볼 경량화를 위한 응력해석)

  • Kim, Hyung-Woo;Cho, Su-gil;Park, Jane;Lee, Jaehwan
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.21 no.2
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    • pp.373-380
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    • 2020
  • A valve product can be over-designed or too heavy. Finite element analysis was performed using ANSYS for two and three-dimensional ball valve models, and the ball weight was reduced by optimization within the allowable design criteria. The ball is structurally safe according to the computed stress values, which are within the material's admissible stress. The weight was reduced by about 22%, and the structural safety factor was 1.25. The structural safety of the seat insert and ring, which are used to prevent leakage, was confirmed through finite element analysis. It is shown that the two-dimensional analysis can result in similar values to the three-dimensional analysis for the axisymmetric structure. The redesign of the valve is not included in the results since such changes require a whole new design process, including all valve components.

A Study on Structural Analysis of High-Pressure Pipeline Retainer-Type Ball Valve by Pressure Testing of the Industrial Standard (산업용 표준의 압력시험 방법에 의한 고압 배관용 리테이너형 볼밸브의 구조해석에 관한 연구)

  • Kim, Chul Kyu;Yoon, Joon Yong
    • The KSFM Journal of Fluid Machinery
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    • v.18 no.5
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    • pp.13-18
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    • 2015
  • This study has been performed to evaluate the safety of the retainer-type ball valve for a high-pressure pipeline to a district heating plant. The retainer-type ball valve is an improved design for conventional ball valves, such as the floating ball valve and the trunnion ball valve. Numerical analysis of the valve design verification has been applied to investigate the safety factor and seat leakage of the DN300 and DN400 sizes. The given condition to solve the structural analysis was based on the international standard for ISO 5208. In this study, the methods for structural analysis are described in detail. The structural analysis results present the deformations, the equivalent stresses, and the safety factors. Through these results, this study successfully demonstrates the safety and seat leakage of the retainer-type ball valve. They also streamline the process of development for valve manufacturing.