[Three rain valve to recommend the star product - Mechanical seal] Introduction: In the past only to be taken to remove the visible fluid leak 108 mechanical seal, without paying attention to the invisible volatiles escape amount of control, thus causing environmental pollution and dangerous equipment and personal. Sealing Technology Committee and abroad such as the American Society of Lubrication Engineers friction formulation of the SP-30 (1994), SP-32 (1990) and SP-33 (1991) with the mechanical seal rotating control machinery, compressors and screw system for easy the amount of volatiles to escape regulatory guidelines. SP-30 is divided into three phases. Which explicitly states that the definition of blocking buffer fluid flow and clarify erroneous concepts of confusion. Blocking fluid is introduced between the double seal completely blocked the process fluid leak fluid into the surrounding environment. Blocking the fluid pressure is always higher than the process fluid pressure to be sealed. Buffer fluid is used as lubricants or buffers between a double sealing fluid, the buffer fluid pressure is always lower than the pressure of the sealed process fluid. [Three rain valve to recommend the star product - Mechanical seal] Description: The first is the use of seal installed set of transport in the "container" concept, resulting in a cartridge seal. This seal rotating and stationary parts of the former preinstalled into a whole, after inspection and pressure test after passing the suit in the box shaft seal mechanical seal 104 with set screws fixed to the shaft 103 mechanical seal, the squeeze cover bolts, remove container positioning pieces, mechanical seals can be in working condition parallel surfaces, put into operation. This will not only ensure the assembly quality and easy to assemble. Currently welded metal bellows mechanical seal cartridge seal are made, it has the above advantages. Cassette seal is also a cartridge mechanical seal. This seal of the stationary ring, ring, sleeve and the gland and the secondary seal before installing all set with a sleeve fitted together, easy to check the quality of assembly. After passing the examination as long as the tight cover, tighten the screw. Such prior assembly, inspection and testing of the seal assembly, easy installation and assembly quality assurance. Mechanical seal _ 105 _ east pipeline pump mechanical seal mechanical seal provided by the election of three rain 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!