International Journal of Mechanical Engineering

Under high-temperature and high-pressure conditions, the working environment of metal hard-sealed ball valves is extremely complex. They are subject to multiple influencing factors such as degradation of sealing performance, wear, and corrosion, resulting in significant uncertainty in their service life and reliability. This paper establishes a life prediction model for metal hard-sealed ball valves, analyzes their reliability by combining actual operating conditions under high-temperature and high-pressure environments, and proposes a life evaluation method based on comprehensive analysis of multiple factors. Through the integration of experimental data and theoretical models, the failure mechanisms of key components such as valve bodies and sealing surfaces are analyzed. Ultimately, this study provides a theoretical basis and engineering reference for improving the service life and safety of valves.

Metal hard-sealed ball valve; Life prediction; High-temperature and high-pressure condition; Reliability analysis; Failure mechanism