[Three rain valve to recommend the star product - Mechanical seal] Introduction: Failure Analysis graphite seal ring (ring) is due to vibration 105-75 crack sealing machine transmission parts, rubber ring up big and graphite ring itself The internal stress caused, and due to high temperature coking is caused, which is common in oil refineries high temperature heat medium. Fuming sulfuric acid, nitric acid, hydrofluoric acid, sodium secondary green, aqua regia, over hydroxides erosion of graphite have several strong oxidant, corrosion effect exacerbated with increasing temperature. Usually hard ring (stationary ring) hot surface can cause severe wear of the seal ring, without the vertical pump cooling. At high temperature, high pressure, spring compression is too large, the shaft will move the string at too large 105-58 mechanical seal, will cause excessive wear of the sealing surface. [Three rain valve to recommend the star product - Mechanical seal] Description: Seal vacuum devices, there are two cases, one is to seal a container filled with a liquid medium with an external vacuum space separated. In this case, the main role is to prevent the seal leakage of a liquid medium into the vacuum space. Another situation is to seal the vacuum cavity and the outer chamber is divided boot seal, its role is to maintain the required degree of vacuum. This situation is more complicated 105-65 mechanical seal, because the surrounding gaseous medium, even a little leak into the vacuum chamber, it will reduce the degree of vacuum. If leakage into the corrosive gases, vacuum equipment may be damaged. In many cases, vacuum and clean the vacuum space, the quality of various processes carried out under vacuum conditions have a decisive influence. Mechanical seal vacuum device used in the structure is not so special. For the first case, usually a good use of airtight metal bellows single mechanical seal. The second situation is to use the double mechanical seal, the use of single seal, seal faces problems bound to not get lubricated. Generally people are very difficult to distinguish between the mechanical seals and hydraulic seals, often thought the same thing. 105-58 _ mechanical seal mechanical seal selected three rain (certified) _ Tongzhou mechanical seal is provided by Valve Co., Ltd. Tianjin three rain. 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.