An overview of the current valve in the two-piece metal-sealed ball valve, the valve body is mainly used to form the shape of the ball valve, the sealing structure is sealed with two separate seat. Because the seat and the valve body are used with clearance fit, and the bottom of the valve seat and the valve body must be sealed with a sealing material, so all the need to seal the site may have the phenomenon of leakage, and the gap around the valve seat It provides abrasion, corrosion and accumulation conditions for the transmission medium in the pipe. Ball valve in the process of switching movements. Sealing material at the bottom of the valve seat at each position of the degree of compaction will change, will cause some parts due to seepage into the medium caused by leakage, seriously affecting the normal operation of the valve for a long time, the valve seat and the bottom of the premature seal structure damage. Due to more leakage points, the valve life is generally short, usually can not meet the user's requirements, only frequent replacement of the ball valve to maintain the operation of the system. Two improvements 2.1 Structure One-way metal seal ball valve (Figure 1) The main components of the left valve body (including the integrated seat), the right valve body, ball, right seat, elastic pad and stem, etc., Contact parts, surfacing Stellite or supersonic spraying of metal particles. Get a super-hard spray coating and make an integral seat sealing surface directly on it. Sphere also uses supersonic spray surface hardening technology. Right seat can not afford to seal, no need for surface hardening treatment. Elastic pad can be flexible graphite, disc springs can also be used. More Search Keywords: Ball Valve