Stainless steel valves D43W, D343W type PN10 ~ PN40 metal seal butterfly using precision J-shaped elastic ring and three eccentric multi-level metal seal structure, is widely used in medium temperature ≤425 ℃ of metallurgy, electric power, petrochemical, and to the drainage and municipal construction and other industrial pipe, for adjusting the load off fluid flow and use. [Features] 1, stainless steel metal seal butterfly valve with three eccentric seal structure, seat and disc almost no wear, with the view of the tight sealing function 2, ring made of stainless steel production, with a metal seal and elastic sealing The double advantage, both in the case of low and high temperatures, all with excellent sealing performance, corrosion resistance, long service life 3, disc sealing surface using cobalt-based alloy welding, sealing surface wear resistance, 4 long life, large-sized disc using lattice structure, high strength, flow area, flow resistance 5, with two-way metal sealing butterfly valve sealing function, limiting the flow of the installation from the media, but also from the spatial position impact, 6 can be installed in any direction, the drive means may be multi-position (rotated 90 ° or 180 °) to install, easy to use