Chemical pump mechanical seal
How to choose a chemical pump mechanical seal: This has become a headache for every consumer. A warm reminder from Changsha Zoomlian Pump: No leakage is the eternal pursuit of chemical equipment, and it is this requirement that has contributed to the increasing application of magnetic pumps. However, there is still a long way to go to truly achieve no leakage, such as the life of the magnetic pump isolation sleeve, the pitting of the material, the reliability of the static seal, and so on.
Some basic information about sealing is briefly introduced as follows:
1. For static seals, there are usually only two types of seals and seals, and O-rings are the most widely used seals; for dynamic seals, chemical pumps rarely use packing seals, mainly mechanical seals , Mechanical seals are divided into single end face and double end face, balanced type and unbalanced type. The balanced type is suitable for the sealing of high pressure medium (usually refers to the pressure greater than 1.0MPA). The double end face mechanical seal is mainly used for high temperature, easy crystallization, and For media with viscosity, particles and toxic volatiles, the double-end face machine seal should inject spacer fluid into the sealed cavity, and its pressure is generally higher than the media pressure by 0.07～0.1MPA.
2. Sealing material Chemical magnetic pump static seal material is generally fluorine rubber, and PTFE material is used in special circumstances; the material configuration of mechanical seal dynamic and static ring is more critical, not cemented carbide is the best to cemented carbide, and the price is high On the one hand, there is no difference in hardness between the two and it is unreasonable, so it is best to treat them differently according to the characteristics of the medium.
