No leakage fluorine plastic pump is the eternal pursuit of chemical equipment. It is this requirement to promote the magnetic pump and canned pump increasingly widely used. However, there is still a long way to go to truly achieve no leakage, such as the service life of the magnetic pump isolation sleeve and the shield pump shielding sleeve, the pitting of the material, and the reliability of the static seal. BelowRecycling fluoroplasticsSmall make up to introduce some knowledge about sealing.
1. Sealing form For static seals, there are usually only two forms: gaskets and sealing rings. Sealing rings are widely used as O-rings. The viscosity of the medium has a great influence on the performance of the pump. When the viscosity increases, the head curve of the pump decreases, the head and flow decrease under good conditions, while the power increases and the efficiency decreases. Generally, the parameters on the sample are the performance when transporting clear water, and should be converted when transporting viscous media. Screw pump is suitable for conveying high viscosity pulp, paste and viscous liquid.
2. Sealing material The static sealing material of the chemical pump is generally fluorine rubber, and the PTFE material is only used under special circumstances. The material configuration of the dynamic and static ring mechanical seal is very important. It is not cemented carbide that is good for cemented carbide. High prices are one thing. There is no difference in hardness between them, and it is unreasonable, so it is recommended to treat them differently according to the characteristics of the medium. For dynamic seals, chemical pumps rarely use packing seals, mainly mechanical seals, which can be divided into single-ended and double-ended, balanced and unbalanced seals. Balanced seal is suitable for high-pressure media (usually refers to the pressure is greater than 1.0 MPa), double-ended mechanical seal is mainly used for high temperature, easy to crystallize, viscous, granular and toxic volatile media.
Above isRecycling fluoroplasticsXiaobian introduces the knowledge about sealing, I hope you can know more about it.