Fluorine-lined butterfly valve uses special problems to deal with

The fluorine-lined butterfly valve uses special problems to deal with the sealing surface of the valve seat and the valve plate in the form of an oblique conical structure. The temperature-resistant and corrosion-resistant alloy materials are surfacing on the oblique conical surface of the valve plate; it is fixed between the adjusting ring pressure plates. The structure in which the spring is assembled with the adjusting bolt on the pressure plate. This structure effectively compensates for the tolerance between the shaft sleeve and the valve body and the elastic deformation of the valve stem under the pressure of the medium, thereby solving the main problem of sealing leakage during the two-way exchange of medium conveying. The sealing ring composed of soft T-shaped multi-layer stainless steel sheets has the dual advantages of metal hard sealing and soft sealing. Here, it has zero leakage sealing performance in both low temperature and high temperature conditions. . During reverse flow, the sealing between the valve plate and the valve seat is caused by the torque of the driving device, so that the valve plate is pressed against the valve seat. With the increase of the reverse medium pressure, when the positive pressure between the valve seat and the valve plate is less than the medium pressure, the deformation energy stored by the spring after being loaded at this time compensates the tight pressure between the valve plate and the valve seat sealing surface. automatic compensation. When the positive medium pressure increases, the tighter the oblique conical surface of the valve plate and the sealing surface of the valve seat are squeezed by the medium pressure, the better the sealing effect will be. In this positive flow state (the flow direction of the medium is the same as the rotation direction of the butterfly plate), the pressure on the sealing surface is the force generated by the torque of the transmission device and the pressure of the medium on the valve plate. Therefore, this new type of valve is not installed on the valve plate with the soft and hard multi-layer sealing ring, instead of the existing technology. It is installed on the valve body. Adding an adjusting ring between the pressure plate and the valve seat is an ideal two-way hard sealing method. .
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