When the valve is opened , when the gate valve lift height is equal to 1:1 times the diameter of the fluid channel is completely smooth, but at run time , this position is not monitored. Actual use, is the apex of the stem as a sign that the position does not move , as its fully open position. Temperature changes appear to consider locking phenomenon, usually open to the vertex position, then rewind 1/2-1 circle , as a fully open valve position . Therefore , the fully open position of the valve, according to damper position ( ie travel "to determine ).

 Keywords:butterfly valve ,knife gate valve,ball valve,globe valve,slurry gate valve