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A butterfly valve is a type of valve that operates by turning 90 degrees; it uses a valve stem to rotate the disc, and it is widely used in food, pharmaceutical, and chemical industries for controlling flow in pipelines, as well as in industrial environmental protection, water treatment, high-rise buildings, and water supply and drainage systems. Throughout continuous research and development, butterfly valves come in many different types, each suited for various application scenarios. Based on their sealing mechanism, butterfly valves can be divided into hard-sealed butterfly valves and soft-sealed butterfly valves. Soft-sealed butterfly valves are primarily used in water treatment, in media with mild acidity or alkalinity, and in environments with low temperature and pressure. Hard-sealed butterfly valves can be used in high-temperature and high-pressure environments. Appropriate materials can be selected based on the properties of different media. The triple-eccentric metal hard-sealed butterfly valve utilizes an elastic stainless steel seal ring mounted on the valve body to achieve true zero leakage, and is generally used in applications with high temperatures or media containing particles. Features of the triple-eccentric metal hard-sealed butterfly valve: 1. The seal can be adjusted, with no leakage even after 100,000 cycles; 2. A special sealing structure ensures that there is no stress-induced deformation of the seal under high-temperature or low-temperature operating conditions, resulting in zero leakage ； 3. Three-dimensional eccentric structure: separation occurs when the seal is opened, and sealing takes place when they come into contact ； 4. Axial positioning device, which addresses the problem of leakage caused by wear of the axial sealing surface; the drive actuator can be installed in any direction ；