Butterfly valve

The utility model relates to a butterfly valve, including valve body, valve shaft, valve plate, handle components, still including setting up the seal structure between valve plate and valve body, seal structure includes a plurality of springs, rubber sealing ring, lid ring, rubber sealing ring sets up with the valve body is concentric, a plurality of spring settings are between valve body and rubber sealing ring, still include angle scale, pointer, the angle scale is fixed on the valve body, the last observation window that is equipped with of handle components, the embedded magnifying glass that is used for observing pointer indication angle value on the angle scale that is equipped with of observation window. The beneficial effects of the utility model are that: the leakproofness is good, in addition the effect of passing angle scale, pointer to make butterfly valve can accomplish the accurate regulation and control of flow when using, the angle scale mark of pointer indication can conveniently be observed