Manufacturing process and performance characteristics of valve ball
The valve ball is the core component of a ball valve, and its manufacturing process directly affects the performance and service life of the valve. The main processes include forging, heat treatment, precision machining, and surface treatment. During the forging stage, high-quality stainless steel or alloy steel is used to ensure material density through hot forging; Heat treatment improves the hardness and wear resistance of the sphere through quenching and tempering processes; Precision machining uses CNC machine tools to ensure the roundness and surface smoothness of the sphere; Surface treatment includes polishing, coating, etc., to improve corrosion resistance and sealing performance.
The performance characteristics of valve spheres are mainly reflected in high precision, corrosion resistance, and wear resistance. The roundness error is usually controlled within 0.01mm, and the surface roughness Ra value can reach below 0.2 μ m. For example, the ball of a certain model of high-pressure ball valve is coated with hard alloy, with a hardness of HRC60 or higher, suitable for high-pressure and high-temperature working conditions. In addition, the material selection and surface treatment technology of the sphere make it have good corrosion resistance and can be used for a long time in corrosive media such as acid and alkali.
