V-type ball valve belongs to trunion mounted ball valve, also take as single seat sealed ball valve. Its regulating performance is the best among the ball valves. Its flow characteristics are equal percentage and its adjustable ratio is 100:1. Suitable for regular operation, quick opening and closing, small fluid resistance, simple structure, easy maintenance, good sealing performance, not limited by installation direction, medium flow direction can be arbitrary, no vibration, low noise, its V-notch and metal valve seat has a shear effect, especially suitable for medium containing fibers, micro-solid particles, slurry and other medium.