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The product of this project adopts the structure of metal hard seal and sealing grease on the sealing surface, which can solve the problem of solid particle abrasion and sealing in the medium well. The pressure balance type cock structure, the opening and closing process of the sealing surface wipe effect, remove solid particles, reduce the damage of the sealing surface, at the same time the lower part of the adjusting mechanism can provide sealing pressure compensation, so that the plug and the valve body sealing surface close fit, seal compensation; Using hyperbolic reinforcing structure, the appearance of the whole valve for continuous curved surface structure, easy to shape manufacturing inspection, product internal defects less, beautiful shape, for the international initiative; The pressure level is up to CL900, which is the largest specification parameter of similar products in China; The product has obtained 1 utility model patent and 1 appearance patent, the hyperBOLic reinforcing structure technology innovation, the product (or technology) for the domestic initiative, fill the domestic gap, and in the domestic similar products leading level. The product has been tested by the National Industrial control system safety and automation instrument quality Inspection and Testing Center, and the measured indicators meet the standard requirements of GB/T 19672-2005 "Pipeline Valve Technical Conditions", GB/T 22130-2008 "Steel plug valve", API6D "Pipeline and Pipeline Valve Technical Specifications".