The valve adopts three eccentric and hard seal structure .It has good performance both under room temperature and high temperature .Compared with other same type Gate valve or Globe valve ,it has lots of merits such as small volume ,light weight ,flexible open and close ,long using life ,etc.It's far-ranging used in metallurgy ,light industry , electric power ,petrochemistry , coal gas channel and so on .Besides it's safety and the first choice to the modern enterprise