Valves are crucial components in industrial processes, enabling precise control of fluid flow within systems and thus having a significant impact on the parameters of these systems. There are various variations of valves, but in this work, we focus on the development of a design solution for a angle control valve. Control valves regulate the flow, pressure, and temperature parameters by moving the plug in the direction of flow or in the opposite direction. The first step in the process of creating an angle valve is the calculation of the fluid flow coefficient, which is a crucial aspect of valve design. An algorithm for calculating the flow coefficient for compressible and incompressible fluids has been developed in accordance with the IEC 60534-2-1 standard, using relevant mathematical expressions that accompany the calculation. When selecting the medium, considerations were given to superheated steam, a pressure drop of 4 bars, and fluid flow, based on which the flow coefficient was calculated. Furthermore, following the EN 12516 standard, the thickness of the valve body wall, the thickness of the valve cover wall, and the flange that will be welded to the valve body are calculated. The issue of sealing the spindle and cover is also addressed, other components are selected, and a 3D model of the angle valve is created. As a final step, technical documentation is prepared, which accompanies all the mentioned calculations and the valve design.