Structural Analysis of 1000A Butterfly Valve Components

J. Ocean Eng. Technol. 2009;23(1):140-145.

Kong Yu-Sik,Kim Seon-Jin,Jung Min-Hwa

School of Mechanical Engineering Pukyong National University,School of Mechanical Engineering Pukyong National University,R&D Center Seong Il Precision Machinery Co. Ltd

1000A용 버터플라이 밸브 주요부품의 구조해석

공유식,김선진,정민화

부경대학교 기계공학부,부경대학교 기계공학부,(주)성일하이테크 기술연구소

Keywords: Butterfly valve, Valve seat, Tensile strength, Structure safety, Safety factor, Disc

핵심용어: 버터플라이밸브, 밸브시트, 인장강도, 구조 안전성, 안전계수, 디스크

Abstract

This paper deals with a stability evaluation of a butterfly valve using the body and disc of a valve seat. The experimental results of a strength evaluation are shown using STS316 stainless steel and spheroidal graphite cast iron (GCD450). The disc material was made from GCD450. The results of the strength analysis are as follows: Ultimate tensile strength 485MPa, Yield strength 370 MPa, Young's modulus $1.1{ imes}10^5$, and Poisson's ratio v = 0.28. For the results of the disc analysis, the safety factor was about 4. This shows that a design was derived that satisfied the requirements of structural safety. However, some problems, such as the deflection and deformation of the disc, may occur when the sea water has back flow with a high pressure.