[Three rain valve to recommend the star product - Mechanical seal] Description: seal failure main reasons: the sealing surface of the mechanical seal is opened when the repair, 85 percent of seal failure is not due to wear and tear caused by mechanical seal, but had worn before leaked. When the sealing surface is opened, the medium of solid particles into the sealed surface under the action of the liquid pressure, the sealing surface after closing M74-65 mechanical seal, these solid particles can be embedded soft ring (usually right ink ring) of the surface, which actually became a "Wheel" will damage the hard ring surface. When the speed <20-30m / s, the choice of spring rotary structure; when higher speed, unbalanced mass of rotating parts can lead to strong vibration, the choice of spring static structure. [Three rain valve to recommend the star product - Mechanical seal] Introduction: The correct assembly tolerances, for the installation of the mechanical seal is necessary, the shaft (sleeve) must have a suitable surface roughness and the correct size, but the manufacturing rarely provide tolerance data M74-85 mechanical seal, these data are critical in terms of installation. Compensation and non-compensation ring ring: compensation ring is sealing ring with axial compensation capability, which can be rotated ring (ring), or non-rotating ring (stationary ring); non-compensated ring is not having the ability to compensate for axial sealing ring, the same can be rotating ring (ring), or non-rotating ring (stationary ring) M74-65 Lanzhou mechanical seal mechanical seal _ _M74 mechanical seal manufacturers selected three rain, rain valve provided by the Tianjin Trade Co. . 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!