The butterfly valve is simple in structure, small in size and light in weight, and only consists of a few parts. Moreover, it can be opened and closed quickly only by rotating 90 °, which is simple to operate. At the same time, the electric valve has good fluid control characteristics. When the butterfly valve is in the fully open position, the thickness of the butterfly plate is the only resistance when the medium flows through the valve body, so the pressure drop generated by the valve is very small, so it has good flow control characteristics. Butterfly valve has two sealing types: elastic seal and metal seal. For elastic sealing valve, the sealing ring can be embedded on the valve body or attached to the periphery of the butterfly plate???

Sealing principle of butterfly valve When processing the valve plate, ensure that its sealing face has a suitable surface roughness value, and the synthetic rubber valve seat forms a suitable surface roughness value when molding. When the valve is closed, through the rotation of the valve plate, the outer sealing surface of the valve plate squeezes the synthetic rubber valve seat, making the synthetic rubber valve seat produce elastic deformation and forming elastic force as the sealing pressure to ensure the sealing of the valve.