Eccentric Semi-ball Valve

An eccentric semi-ball valve is a high-performance valve designed for both regulation and shut-off. Its core design employs an eccentric rotation principle: there is an offset between the rotational center of the spherical disc and the geometric center of the seat seal ring. During opening and closing, the disc rapidly separates from or contacts the seat, achieving near-zero friction and extended wear life. The eccentric semi-ball valve primarily consists of a valve body, an eccentric spherical cap-shaped disc, a flexible or metal seat, a rotating shaft, and a drive mechanism. Its operation combines the rotational opening/closing of a ball valve with the wedge-like compression sealing characteristic of a gate valve, achieving a tight seal through the eccentric swing of the disc. Eccentric semi-ball valves offer significant advantages, including excellent regulating characteristics, high flow capacity (high Cv value), strong shearing force, and high sealing class (up to Class VI). Their unique eccentric structure avoids direct friction between sealing surfaces, making them particularly suitable for handling demanding media containing particles, fibers, slurries, or substances prone to crystallization. The eccentric semi-ball valves produced by KAIWEIXI Valve Group are widely used in harsh applications across industries such as power generation, metallurgy, papermaking, wastewater treatment, and coal chemical processing, handling demanding fluids like ash slurry, ore pulp, paper pulp, and wastewater.