el globe valve start to open, there won't be any contact for stainless steel globe valve's seat and disc, because their sealing surface's mechanical wear is small, because that the stainless steel globe valve's seat and disc is easy to be repaired, no need to dismantle the valve from the pipeline when replac the sealing element. This is applicable for the situation that the valve was welded on the pipeline instead of flanged.3, Globe valve's medium flow resistance is bigger than other valves.4,