Special Installation Requirements For Sealing Gaskets

1. When installing the sealing spiral wound gasket that matches the protruding flat flange, attention should be paid to ensuring that the sealing element is concentric with the pipeline. Generally, the external strengthening ring is used to contact the inner circumferential surface of the bolt for positioning, and eccentric installation is not allowed. When installing the basic type spiral wound gasket in the sealing surface flange of the tenon groove, attention should be paid to maintaining a consistent gap with the groove wall surface.
2. When installing metal clad gaskets with a narrow width, a certain thickness of steel plate should be placed on the outer side of the gasket, and then the flange should be pressed tightly to avoid the expansion of the interface (or lap) of the metal shell after the wrapping filler inside the metal gasket is compressed, which may damage the metal clad gasket.
3. When the working temperature of the flange is above 200 ℃, sealant should be applied between the flange sealing surface and the sealing gasket to prevent sintering between the sealing gasket and the flange sealing surface under high temperature, which will add trouble to maintenance and replacement of the sealing gasket.
4. If the sealing surface is uneven, you can apply sealant on the sealing surface before installing the sealing gasket. Sealants are generally composed of manganese dioxide, lead oxide, graphite powder, and boiled flaxseed oil (dry oil). Corresponding types and grades of liquid sealants can be selected based on conditions such as sealing medium, working temperature, and medium pressure.
5. For the installation of octagonal metal ring gaskets, when the processing of the metal ring gasket and flange sealing groove is not ideal, tight fitting can be achieved through matching research. For large-diameter metal ring gaskets, it is difficult to match them. In order to fill the small unevenness on the metal surface, sealant can be used.