The V-type ball valve is a single-seat ball valve with a metal seat. The adjustment performance is the best in the ball valves, whose flow characteristics are equal percentages, and the adjustable ratio is up to 100:1. It has a shearing action between the V-shaped slit and the metal seat, and is especially suitable for media containing fibers, tiny solid particles, and slurry.

During the rotation of the sphere, the V-shaped slit is tangent to the valve seat, thereby cutting off the fibers and solid matter in the fluid, while the general ball valve does not have this function, so it is easy to cause the fiber impurities to jam when closed, causing great inconvenience for maintenance and repairing. When the valve is closed, the V-shaped slit and the valve seat act as a pair of scissors, and have both a self-cleaning function and a function of preventing the core from being stuck. The valve body, the valve cover and the valve seat respectively adopt a metal point-to-point structure, and a friction coefficient is small. Therefore, the stem spring has a small operating torque and is very stable.