201C ball valves are small in size, light in weight and easy to disassemble.V-shape opening design, the sphere is always rotating against the valve seat during the whole adjustment process, which has self-cleaning function itself, and the V-shape cutout can realize the adjustment of tiny flow in the range of small opening degree. The product is not only suitable for clean media, but also particularly suitable for media containing fibers, fine particles, slurry, etc. It can be used in control systems requiring large adjustable ratio, and it is a kind of widely used, energy-saving, high-quality regulating ball valve.