Their main differences are:
The former has no C, which means forged steel, carbon steel and other materials can be used.
C at the back of 25C means that the valve is made of carbon steel, and other materials cannot be added with C. ..
The ball valve defined in GB/T2 1465-2008 "Valve Terminology" is a valve whose opening and closing parts (spheres) are driven by the valve stem and rotate around the axis of the ball valve. It can also be used for fluid regulation and control. The V-shaped ball valve with hard seal has a strong shear force between its V-shaped ball core and the metal valve seat of hard-faced cemented carbide, which is especially suitable for media containing fibers and tiny solid particles. The multi-way ball valve can not only flexibly control the confluence, diversion and flow direction switching of the medium in the pipeline, but also close any channel and connect the other two channels. Generally, this valve should be installed horizontally in the pipeline. Ball valves are divided into pneumatic ball valves, electric ball valves and manual ball valves according to the driving mode.