Structural diagram of metal coated gasket

Structural diagram of metal coated gasketA composite gasket made of non-metallic materials such as flexible graphite, asbestos rubber sheets, and ceramic fibers, with a specific cold working process used to wrap the metal sheet on the outside. The gasket is usually divided into two types based on its cross-section: flat wrapping and corrugated wrapping. It is a traditional sealing gasket suitable for sealing heat exchangers, pressure vessels, pumps, valves, and flange surfaces. But the rebound force is limited, and it is necessary to have a flat flange surface and high fastening force to achieve good results (which can be improved by applying graphite board externally). According to different materials, it can be combined into various forms such as 201, 304, 316 stainless steel graphite (temperature resistance of 650 degrees) coated pads, asbestos coated pads, ceramic fiber (1400 degrees) coated pads, etc.
The main products include ramie wire root, aramid fiber wire root, black PTFE wire root, carbon wire root, graphite wire root, injection type soft filler, metal graphite winding pad, high-strength graphite composite pad, ladle gasket, purple copper pad, etc.
Gaskets should be packaged separately according to specifications and materials, and should be accompanied by a product quality inspection certificate upon delivery, with each gasket labeled. Indicate the standard number, engineering size DN, nominal pressure PN, cladding metal material, and filling material. For example, HG/T20609 metal clad gasket 200-25 304/XB350
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Sealing without leakage is the eternal pursuit of chemical equipment, and it is this requirement that has led to the increasing application of magnetic pumps and shielded pumps. However, there is still a long way to go to truly achieve zero leakage, such as the lifespan issues of magnetic pump isolation sleeves and shielding pump shielding sleeves, material corrosion issues, reliability issues of static seals, and so on. Here are some basic information about sealing:
1. Sealing materials: Fluororubber is generally used as the static sealing material for chemical pumps, and polytetrafluoroethylene material is only used in special cases; The material configuration of the mechanical seal dynamic and static rings is crucial, and the high price is one aspect. The lack of hardness difference between the two is also unreasonable. Therefore, according to the characteristics of the medium, the joints between the rigid waterproof layer and the gable, parapet, and protruding roof structure should be treated with flexible sealing. 2. For static seals, there are usually only two forms of sealing: gaskets and seals, with O-rings being widely used; For dynamic seals, chemical pumps rarely use packing seals, mainly mechanical seals. Mechanical seals are divided into single end and double end, balanced and unbalanced types. The balanced type is suitable for sealing high-pressure media (usually referring to pressures greater than 1.0 MPa), while the double end mechanical seal is mainly used for high-temperature, easily crystallized, viscous, particle containing, and toxic volatile media. The double end mechanical seal should inject isolation liquid into the sealing chamber, and its pressure is generally 0.07-0.1 MPa higher than the medium pressure.
Structural diagram of metal coated gasketSuitable for sealing heat exchangers, pressure vessels, pumps, valves, and flange surfaces. Specially suitable for hot air valves in steel plants, flue valves, and heat exchangers in chemical plants, easy to install