Chemical pump seal knowledge
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June 25 10:06:29, 2024
No leakage is the eternal pursuit of chemical equipment, it is this requirement has led to the growing use of magnetic pumps. However, there is still a long way to go without leakage, such as the life span of the magnetic pump isolation sleeve, the material pitting problem, the reliability of the static seal, and the like. Now on the sealing of some of the basic situation is briefly described as follows: 1. Seal For the static seal, seal and seal are usually only two forms, and O-ring seal again the most widely used; for the dynamic seal, chemical Pumps rarely use packing seals, mainly mechanical seals, mechanical seals have a single end and double end, balanced and unbalanced points, balanced for high pressure medium seal (usually refers to the pressure greater than 1.0MPa), double End machine seal is mainly used for high temperature, easy to crystallize, viscosity, containing particles and toxic volatile medium, double seal should be injected into the sealed chamber isolation liquid, the pressure is generally higher than the medium pressure 0.07 ~ 0.1MPa. 2. Sealing material Chemical magnetic pump static sealing materials commonly used fluorine rubber, special circumstances only use PTFE material; mechanical seal ring static material configuration is more critical, not cemented carbide on the best cemented carbide, high price On the one hand, the difference between the two hardness is not reasonable, so it is best to distinguish between media characteristics.