Pressure vessel flanges have three sealing forms

1. Forced sealing
Mainly by tightening the connecting bolts between the end cover and the cylinder flange, the sealing surface is pressed tightly, so as to achieve the purpose of sealing, such as flat gasket seal, Kazali seal, etc.
2. Self-tightening seal
The pressure of the medium in the container can be used to generate a compressive force on the sealing surface to achieve the purpose of sealing. Its sealing force increases with the increase of medium pressure. Therefore, it can maintain reliable sealing performance under higher pressure, such as combined seal, O-ring seal, C-ring seal, B-ring seal, wedge seal, octagonal pad and oval pad seal, flat pad self-tightening seal , Wood seal, nitrogen seal, etc.
3. Semi-self-tight seal
Not only the pressure of the medium in the container is used, but also the connection of the fasteners is used to generate a compressive force on the sealing surface to achieve the purpose of sealing, such as a double cone seal.