Butterfly valve
A butterfly valve and valve body technology, applied in the field of butterfly valves, can solve the problems of seat ring deterioration, failure to achieve sealing, failure to promote sealing, etc.
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[0028] The embodiment of the butterfly valve of the present invention will be described below with the accompanying drawings. Fig. 1 is a front view of the butterfly valve of the present invention, Fig. 2 is a sectional view along the line A-A of Fig. 1, Fig. 3 is a sectional view of the seat ring along the direction of the valve axis, and Fig. 4 is a sectional view of the seat ring along the direction perpendicular to the valve axis.
[0029] The butterfly valve is set at the connecting part of the pipe that can flow in it, and performs on-off control and flow adjustment of the flow path. It has: an annular valve box 1, which is clamped by two pipes along its axial direction (flow path direction); A substantially disc-shaped valve body 2 installed inside the valve box 1; the valve body 2 is freely rotatably supported around the valve shaft 3 (the axis passing through the center of the valve box 1 in a direction perpendicular to the direction of the flow path). The valve rods ...
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