The D363H welding butterfly valve adopts a three eccentric metal sealing structure. When opened, the butterfly plate and valve seat contact instantly when closed, utilizing the eccentricity of the butterfly plate to quickly detach from the valve seat, reducing the wear of the sealing pair, reducing friction torque, and making opening flexible. Eccentric conical surface enables the butterfly plate to pass through the inner hole of the valve seat during opening or closing, achieving contact sealing. In addition, the rotation radius of the conical butterfly plate is greater than the rotation radius of the contact position of the sealing pair, so the butterfly plate will become tighter and tighter when the valve is closed, which can achieve self-locking and prevent the butterfly plate from over positioning.

1. It has characteristics such as high temperature resistance, high pressure resistance, corrosion resistance, and wear resistance.
2. Compact structure, small size, light weight, flexible operation, and convenient use.
3. This valve has no flanges, making it convenient and aesthetically pleasing for pipelines and insulation wrapping.
4. Adopting a welded structure to achieve zero leakage between the valve and the pipeline plane.
5. Adopting a three-dimensional eccentric elastic or multi-level hard sealing structure, its sealing performance is reliable and reaches zero leakage.