Features: 1, the valve adopts 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 of the dual advantages, both in the case of low and high temperatures, all with excellent sealing performance, corrosion resistance and long service life. 3, the disc plate sealing surface using cobalt-based alloy welding, sealing surface wear resistance and long service life. 4, large-sized disc using lattice structure, high strength, flow area, flow resistance. 5, the valve has a two-way sealing function, the installation of unrestricted flow of media, is not affected by spatial location can be installed in any direction. 6, the drive can be multi-position (rotated 90 ° or 180 °) to install, easy to use. ? The main component material Part Name Material Body WCB, alloy steel, stainless steel, QT450-10 disc WCB, alloy steel, stainless steel, QT450-10 valve shaft 2Cr13 stainless steel, alloy steel ring flexible graphite packing ring