[Three rain valve to recommend the star product - Mechanical seal] Description: Mechanical seal is a rotary mechanical shaft seal device. Such as centrifugal pumps, centrifuges, reactors and compressors and other equipment. Due to the presence of the drive shaft through a gap between the inner and outer circumference of the device, so that the axis of the machine, the media leak out through the gap, if the pressure is lower than atmospheric pressure inside the device, the air leakage into the device, so there must be a The shaft sealing device prevents leakage. Many types of seal, due to the mechanical seal has less leakage and long life, etc., so the world of mechanical seals in these devices is the most important way of shaft seal. Mechanical seals, also known as seal mechanical seal, in the relevant national standards are defined as: "by at least a pair of vertical kept under fluid pressure and compensation mechanism stretch (or magnetic) role and secondary seal fitted to the end face of the axis of rotation posted consolidated relative sliding constituted prevent fluid leakage device "[three rain valve to recommend star products - mechanical seals] Introduction: There trimming sealing surface: This is due to the sealing surface too far apart, and in close When the fracture. Flash (gasification) is separated from the sealing surface of the more common reasons, especially when the condensate in the hot water system or fluid, water from the expansion of the liquid into a vapor, the sealing surface can be separated. (Cold medium also cause vaporization) sealed metal parts, such as springs, fixing screws, transmission parts and metal sets are likely to be a source of seal failure. Spring by alternating stress corrosion is it the most important issue, because the metal will corrode quickly under stress, stainless steel spring susceptible to chloride stress corrosion, and there are many in the world of mechanical seals chloride H76-90 So there is the foreign department suggested H76-85 mechanical seal, do not use stainless steel spring, and is recommended to use a higher corrosion resistance Haast steel springs. In addition, improper assembly spring fatigue is another reason for the failure. Fixing screws H76-65 mechanical seal mechanical seal used, do not use the material cured to do, because the heat treatment will reduce metal corrosion resistance, and non-heat treated softer fixing screws can be fastened to the shaft. H76-85 mechanical seal mechanical seal _H76 selected three rain (certified) _ Inner mechanical seal is provided by three rain Valve Co., Ltd. of Tianjin. Valve Co., Ltd. Tianjin three rain (www.tjsymf.com) is a leader in Tianjin, seals, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. In three rain valve leadership with the staff warmly welcome all inquiries negotiations to create three rain valve a better future.