This kind of butterfly valve is usually called high performance butterfly valve. 1. Structural features: The center of rotation of the valve plate (the center of the valve shaft) forms a dimension “a” offset with the valve plate sealing section, and forms a dimension “b” offset with the centerline of the valve body.
The main reasons for the failure of the sealing performance of the single eccentric sealing butterfly valve: 1. During the opening and closing process of the butterfly valve, when the valve plate rotates and squeezes the elastic soft valve seat, the valve disc and the valve seat are mechanically worn and scratched;
Features of single eccentric sealing butterfly valve: 1. The structure is more complicated than the centerline sealing butterfly valve, and the cost is slightly higher;
The sealing principle of single eccentric sealing butterfly valve:1. Structural features: The center of rotation of the valve disc (the center of the valve shaft) is located on the centerline of the valve body, and forms an α dimension offset with the sealing section of the valve disc.
The sealing principle of the centerline butterfly valve is to ensure that the sealing surface has a suitable surface roughness when processing the valve disc, and the synthetic rubber valve seat forms a suitable surface roughness value of the sealing surface during molding.