I. Product Overview 
 I plant the introduction to foreign advanced technology on the basis of the precision of the J-shaped elastic sealing ring and three eccentric multi-level metal hard seal structure and grants, is widely used for medium temperature ≤ 425 ° C metallurgy, electric power, petrochemical, and water supply and drainage and the municipal construction and other industrial pipe for drying up the body to regulate the flow and carrier. Three-eccentric structure of the valve, the valve seat and disc sealing surface hardness and made of stainless steel with good corrosion resistance, long life, bi-directional sealing function of the valve's military postal products meet national GB/T13927-92 valve pressure test standard. 

 Second, the characteristics 
 1, the hard seal pneumatic butterfly valve, triple eccentric sealing structure, seat and disc are almost no wear, the more the concept of more tight sealing function. 
 2, the ring made of stainless steel production, with the dual advantages of the metal seal and elastomeric seals, both in the case of low and high temperatures, with excellent sealing performance, corrosion resistant, long life characteristics. 
 3, the disc sealing surface surfacing cobalt based cemented carbide, sealing surface wear resistance, long service life. 
 4, large-format disc using a truss structure, high strength, flow area, flow resistance is small. 
 5, the valve is bi-directional sealing function, the limitations of the medium flows from the installation, are not subject to the impact of spatial location can be installed in any direction. 
 6, the drive can station (rotated 90 ° or 180 °) to install, user-friendly. 
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