How to replace the sealing ring of a large stainless steel flange

The sealing ring of a large flange generates a self-sealing force under the working pressure in the opposite direction, which increases the sealing specific pressure and presses the valve seat. The greater the working pressure in the opposite direction, the greater the self-sealing force, so the sealing ring is tightly connected to the valve seat to achieve a two-way seal. In high-pressure equipment and pipelines, metal gaskets of lenses or other shapes made of copper, aluminum, No. 10 steel and stainless steel are used. The contact width between the high-pressure gasket and the sealing surface is narrow (line contact), and the sealing surface and the gasket have a high processing finish.

The stainless steel flange sealing ring is a product that is connected by two flanges and placed in the middle of the two flange sealing surfaces, and then the flanges are tightened with bolts to prevent flange leakage. When replacing the sealing ring of a large flange, when the sealing ring needs to be replaced, there is no need to remove the valve disc, just open the valve next to the flange, and then remove the key on the operating device to adjust the operating device to the closed state. After that, it is still connected to the main valve key, and then continue to turn the handwheel in the opening direction until the sealing ring is on the side facing the valve body seal to replace the sealing ring.

The sealing ring of the large flange generates a self-sealing force under the working pressure in the opposite direction, which increases the sealing pressure ratio and presses the valve seat. The greater the working pressure in the opposite direction, the greater the self-sealing force. Therefore, the sealing ring is tightly connected to the valve seat to achieve a two-way seal. In high-pressure equipment and pipelines, lens or other shaped metal gaskets made of copper, aluminum, No. 10 steel and stainless steel are used. The contact width between the high-pressure gasket and the sealing surface is narrow (line contact), and the sealing surface and the gasket have a high processing finish.