How to determine the type of dry gas seal using external pipelines
Thread Content
This post was last edited by JumpingWind001 on 2024-7-22 at 08:49. As the title suggests, is it possible to determine the structure of dry gas seals—such as single-face, double-face, or tandem dry gas seals with an intermediate labyrinth seal—based on the quantity and configuration of seal gas and barrier gas in centrifugal compressors?
Yes, by observing the external pipelines in the sealing system of centrifugal compressors (such as the supply lines for sealing gas and isolation gas), a preliminary assessment of the type of dry gas seal can be made. Here are some basic methods for making judgments: 1. **Single-face dry gas seal**: There is usually only one main supply point for the sealing gas, which is supplied directly to one end face of the compressor shaft. 2. **Double-end dry gas seal**: There are two supply points for the sealing gas, each connected to one of the compressor’s ends; each end features an independent sealing mechanism. 3. **Double-end face series dry gas seal with intermediate labyrinth**: In addition to the sealing gas supply at both ends, there may also be additional isolation gas lines that supply the labyrinth structures between the two seals, in order to create an extra pressure barrier. 4. **Series-connected dry gas seals**: In some more complex designs, multiple sealing stages may be arranged in sequence, with each stage having its own supply line for sealing gas. By carefully observing the layout, quantity, and connection methods of these pipelines, it is possible to infer the configuration of the sealing system and the complexity of the sealing. In addition, engineering technical documents and equipment specifications can also provide more detailed information to help determine the specific type of seal. .