The purpose of rotary joint seals

The purpose of the seal in the rotary joint is to seal the connection and allow one of the two pipeline sections to rotate relative to the other. At the same time, in order to reduce the pressure drop across the connection. Therefore, it is best to place the rotary joint seal in the enlarged axial portion of the entire fluid bearing channel formed by the pipeline section, so that the inner diameter of the rotary joint seal is at least approximately equal to the diameter of the channel.

A noteworthy feature of rotary joint seals is that they are best made of a material that can deform radially outward and protrude into the connection without breaking due to relatively high pipeline pressure. When the pressure inside the sealing ring increases to a degree that causes it to deform and partially protrude into the connection, the ability of the rotary joint cannot have significant adverse effects. This is because the protruding part of the seal does not function as a bearing surface