Ball valve (ball valve should be a shut-off valve in the offshore and marine fields), the standard GB/T21465-2008 "valve terminology" is defined as: the opening and closing member (sphere) is driven by the valve stem and rotates around the axis of the ball valve . It can also be used for fluid regulation and control. The hard-sealed V-ball valve has a strong shear force between the V-shaped core and the metal seat of the hardfacing alloy. It is especially suitable for fiber-containing, micro-solid particles. Etc. The multi-way ball valve not only can flexibly control the switching of the merge, split, and flow directions of the medium, but also can close any channel and connect the other two channels. This type of valve should generally be installed horizontally in the pipeline. Ball valve classification: pneumatic ball valve, electric ball valve, manual ball valve.