Reliability and safety issues of pipeline valves in mechanical engineering

\nThe condition for safe operation of technological systems of hazardous production facilities is the correct selection and reliable operation of valves. This paper presents the results of numerical modelling of shut-off valves in dependence on various operating conditions in order to determine their reliable and safe operation. The most common type of valve used is the needle valve. The hydrodynamic and strength conditions of the needle valve are modelled in the Ansys Fluent system. The results obtained made it possible to identify the weak points of the valve studied, to determine the maximum stresses that occur during its operation, and to determine its reliability.\n