(5), the sealing surface has a cutting edge: this is due to the sealing surfaces too far apart, and in the closed 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 chloride in the presence of many of the world, so there are overseas departments recommend, 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 ISG150-200A mechanical seal used in mechanical seals, 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. First, the installation of mechanical seals Notes: 1. Check the mechanical seal with the size of the parts, roughness, parallelism meets the requirements, check the mechanical seal type, size, number of compliance requirements, all parts (especially the sealing surface auxiliary ring) without damage, deformation, cracks and other phenomena, if defective, must be replaced or repaired. Check that the hub or gland chamfer is appropriate, do not meet the requirements must be trimmed. 2. Check the runout of the host, and the amount of deflection swing meets the technical requirements of the sealed chamber meets the installation size ISG150-250 mechanical seals, seal cover and whether the axis perpendicular to the general requirements: shaft runout is not greater than ± 0.5mm; axis swing amount (the rotating ring seals at) is not greater than 0.06mm; maximum deflection of the shaft is not greater than 0.05mm; contact with the gasket sealing cap plane is not perpendicular to the centerline of the allowable difference 0.03 ~ 0.05mm. 3, the mechanical seal installation environment must be clean, no sand lime and dust around. Mechanical seal during installation, you must be a shaft (or sleeve) sealed cavity seal cover and mechanical seal itself clean, to prevent any impurities into the sealing parts, care must be taken when installing the mechanical seal carefully, not with force, can not knock strike. 4, mechanical seal gland (including static ring) in the absence of the completion of the installation shall jigger to prevent dynamic and static ring to scratch each other. ISG150-200 mechanical seals, mechanical seals, pipeline pumps supplied by Anguo Shi Yuan Pumps Limited. Anguo Shi Yuan Pump Co., Ltd. (www.shiyuanbeng.com) strong, credible, in Baoding centrifugal pumps and other industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead you hand pumps and stone yuan into the brilliant, for a better future!