- DUAL-METAL MOLECULARLY BONDED PLUG ASSEMBLY FOR NON-LUBRICATED DOUBLE BLOCK AND BLEED PLUG VALVES AND METHOD OF FABRICATION THEREOF

摘要

Plug valve plug assembly is one of the other for the plug has been prepared in two distinct metal to the stem or the trunnion. In a preferred embodiment, the plug was made of mild steel, the stem or the trunnion was prepared by high-grade stainless steel. The two metals are joined at their respective surfaces when the casting within the mold plug to molten iron includes a steel stem molecularly. Also the mechanical bond has been presented By the formation of the iron pin through a hole in the stem of stainless steel.