In this case, we must find a way to change this situation. The valve experts lived up to expectations and found a solution: the main parts of the one-way metal seal pneumatic ball valve include the left valve body (including the integrated valve seat), the right valve body, the ball, the right valve seat, the elastic pad and the valve stem, and the contact part between the left valve body and the ball, Build up stellite alloy or spray metal particles at supersonic speed to obtain superhard spray coating, and directly make an integrated valve seat sealing surface on it. The sphere also adopts supersonic spray surface hardening technology. The right valve seat does not play a sealing role and does not need surface hardening treatment. The elastic pad can be made of flexible graphite or disc spring. The valve improved by this method has been well applied in production practice.

The pneumatic wafer type butterfly valve has a novel structure. The valve body structure is a short distance wafer type structure formed to meet the narrow pipeline space, with zero external leakage and internal leakage in line with national standards.