Good sealing performance; Since the hard seal pneumatic ball valve is sealed by manual grinding, it cannot be used until the valve core and seal ring are completely matched. Therefore, its sealing performance is reliable. It has been widely used in petroleum, chemical industry, power generation, paper making, atomic energy, aviation, rocket and other sectors, as well as in people's daily life. 　　

The flange three eccentric multi-level hard sealing butterfly valve products can be applied to industrial pipelines such as petrochemical, food, medicine, textile, paper making, power, sewage treatment, water supply and drainage and smelting. It can be used as the opening and closing mechanism to control the flow of medium on the transmission pipelines or containers for various gases, liquids, semi liquids and micro particles. Flange three eccentric multi-level hard seal butterfly valve can be installed at any position. The flange three eccentric multi-level hard sealing butterfly valve series has a certain self-cleaning capacity. It can show multiple advantages when used in sewage pipelines such as steel plants and municipal pipelines, without maintenance, and has good sealing performance and easy operation.