Butterfly valve is a 90 - degree switch valve, the valve stem drive disc plate rotation, widely used in food, medicine, chemical industry and so on the net line and industrial environmental protection, water treatment, high building, water supply and drainage pipeline for open/close or adjusting medium flow. In the development of research and development, the butterfly valve and there are many kinds of classification are applied in different working condition. Butterfly valve in accordance with the sealed forms can be divided into hard sealing butterfly valve and soft sealing butterfly Industrial Valves, soft seal butterfly valve is used in water treatment, basic weak acid alkaline medium, low temperature low pressure place. Hard seal butterfly valve can be used in place of high temperature and high pressure. Can choose the right material according to the different dielectric properties. Triple eccentric metal hard seal butterfly valve utilizes a elastic stainless steel sealing ring is installed on the valve body to achieve true zero leakage, commonly used in high temperature and medium conditions with particles, special occasions. Triple eccentric metal hard seal butterfly valve features: 1, the seal may adjust, 100000 times life without leakage: 2, special seal structure, the high temperature, working condition and cold sealing stress free deformation, to achieve zero leakage; 3, the three dimensional eccentric structure, open the seal separation, close contact with the sealing; 4, axial positioning device, solve the problem of axial sealing surface wear is easy to leak, drive actuators can install facing any party;
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