[Three rain valve to recommend the star product - Mechanical seal] Description: Seal Failure Analysis: When checking the hard surface of the ring, there are four signs to note: a, ceramic ring rupture; b, thermal cracking; c, nicks ; d, the coating off. Tight ceramic ring assembly is the main rupture, improper assembly who is also a relatively common cause. Because the coating material and the substrate material both linear expansion rate of the different mechanical seal, so the temperature rises, the ring surface cracks will appear, especially Stellite alloy is particularly serious. In the more advanced coating materials, nickel-cobalt-based tungsten carbide based coating is better. The cooling of the sealing surface, can effectively prevent thermal cracking 104-30 mechanical seal, the sealing surface of the solid particles remaining on the surface is often damaged, such as sand grinding wheel will damage the hard surface on the ring, resulting in the sealing surface to open or generate crystals 104-50 mechanical seal between the seal faces, but after re-grinding graphite ring, the grind will be embedded in the surface of the graphite ring. [Three rain valve to recommend the star product - Mechanical seal] Description: For the sealing surface wear marks still need to add the following to check signs of wear, can help analyze failures. (1), and wear wider: Indicates the pump was a serious misalignment. The reason is: a, bearing damage; b, shaft vibration or axial deformation; c, shaft bending; d, pump cavitation vibration; e, uncoupled pair; f, severely deformed tube; g, seal stationary ring tilt. (2), wear scar narrowing: grinding marks narrower than the minimum width of the two sealing surfaces, which illustrate the sealing overpressure, pressure or temperature of the sealing surface deformation. (3), no wear marks: Description sealing surface is not bonded. Check the springs and other compensation mechanism is slipping or impeded. (4), the sealing surface no wear marks, but there are bright spots. Sealing surface will be a bright spot without warping wear scar. 104-60 mechanical seal pressure is too high, the gland bolts screwed good or not good clip, or pumps can form a rough surface highlights. When using two bolts of the gland, the stiffness is not enough, the deformation is another cause of highlights. When this symptom description: a drive to seal the leak may occur. 104-25 Nanchang mechanical seal mechanical seal _ _104 mechanical seal manufacturers selected three rain provided by Valve Co., Ltd. Tianjin three rain. Valve Co., Ltd. Tianjin three rain (www.tjsymf.com) strong, credible, in Tianjin seal industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead the three rain valve into the brilliant and you work for a better future!