The electric centerline butterfly valve (concentric butterfly valve) adopts a centerline structure design. The center of the valve plate and the center of the valve body are concentric, that is, the shaft center of the valve stem, the center of the butterfly plate and the center of the valve body are all at the same position, forming a mind-centered consciousness. The shaft center line of the valve stem and the center plane of the butterfly plate are in the same plane and perpendicularly intersect the center line of the valve body pipe. Connection methods are: clamp, clamp, flange.
5. The valve seat is made of synthetic rubber. When closed, the outer sealing surface of the butterfly plate squeezes the synthetic rubber valve seat to make the valve seat elastically change and form an elastic force as the sealing specific pressure to ensure the sealing of the butterfly valve.