Triple offset butterfly valve seal structure

The utility model relates to a triple offset butterfly valve seal structure. Including valve body (1) and valve plate (3), to be close to valve body (1) and to locate to install sealing ring (5) on this valve plate (3), its characteristics are: wherein the build -up welding has hard alloy layer (6) on sealing ring (5), and on other valve body (1) the sealed face of this sealing ring (5) also the build -up welding have hard alloy layer (6). The utility model discloses a sealing ring build -up welding structure, through identification on probation, improved effectively that triple offset butterfly valve is wear -resisting, scouring resistance can, prevent the damage of sealing ring, improve triple offset butterfly valve sealing performance, extension valve life. Simultaneously, adopting with same standard circle pin location among processing and the assembly?process, guaranteeing the central horizontal reference face coincidence of the reference surface and the valve body of sealing ring, reduce position error,