How to choose the sealing ring according to the medium

How to choose the sealing ring according to the medium In normal use, we all know that different mediums require different sealing rings for the mechanical seal of the kettle, so how do we make a selection? The medium is usually divided into four types: 1. Easily vaporized medium. Its request for the seal ring is to request a low conflict coefficient and good thermal conductivity. The autoclave uses a mechanical seal of the conflict secondary material to seal the cavity, especially the end face of the seal should be sufficiently cooled to avoid leakage. The liquid causes icing on the end face of the seal. 2. For high-viscosity medium, its request for the sealing ring is that the conflicting material is wear-resistant. The spring must have enough ability to overcome the resistance of high-viscosity medium to avoid the increase of the viscosity of the medium due to the low temperature of the sealing cavity, and the sealing cavity is required to keep warm Or heating. 3. The medium containing solid particles is wear-resistant to the conflict of the sealing ring, and it must be able to eliminate solid particles or avoid solid particles from depositing. 4. Gas medium, it has low porosity to the graphite-impregnated sealing ring of the sealing ring and wear-resistance to the conflicting auxiliary materials; the sealing ring has good buoyancy, especially for the sealing of mixing equipment; when used for vacuum sealing, pay attention to the outside air Leakage, pay attention to the directionality of the seal. In actual application, we can select the sealing ring according to the characteristics of the above medium.