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1. When the installation flange matches the plane flange, attention should be paid to ensuring that the seal is concentric with the pipe, and the inner circumference of the reinforced ring and bolt is generally used to locate, and eccentric installation is not allowed. When installing the basic spiral wound gasket on the flange of the mortise and tenon joint, attention should be paid to the gap between the groove wall and the groove wall.

2, when the width of the installation of the metal gasket is narrow, the thickness of the gasket should be fixed on the outside, and then according to the flange, so as to avoid the packing in the compression gasket, the metal shell interface (or overlap) bursts, and the gasket is damaged.

3. When the working temperature of the flange is higher than 200 degrees, sealant should be applied between the flange sealing surface and the gasket to prevent the gasket and the flange sealing surface from sintering at high temperature to repair and replace the gasket failure.

4, the sealing surface is not normal, you can apply sealant on the sealing surface, and then install the gasket. The sealant is generally composed of red lead, manganese dioxide, graphite powder and boiled linseed oil (oil). According to the sealing medium, working temperature, medium pressure and other conditions, select the appropriate sealant type and grade.

5, for the installation of octagonal metal ring gasket, when the metal ring gasket and flange sealing groove processing is not ideal, it can be achieved by the study of tight fit. Large diameter metal ring pad, difficult to adapt to research. In order to fill the tiny surface of the metal surface, a sealant can be used.

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