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Spiral wound gaskets are one of the best kinds of gaskets used for sealing applications in high pressure and high temperature conditions. Here is all you would like to know about them – the materials, applications, and types.<br>Read more @ https://goo.gl/zYP9Pu
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Spiral wound gaskets are made by spirally winding a metallic material and filler material overaninnerringmadeofspecialsteel.Generally,themetallicmaterialiswoundoutwards in a circular spiral, and the filler material is wound in the same manner starting from the opposite side; thus resulting in alternating layers of filler and metal. The metal gives structural support, while the filler material acts as a sealing element. Trim Engineering Services are one of the leading spiral wound gasket manufacturers in India, who not only manufacture spiral wound, but also metallic, and non-metallic gaskets with the bestqualitymaterialsandprocesses. • Whatarespiralwoundgasketsmadeof? • The materials used for the metal and filler are decided upon depending on the chemical compatibilityrequirementsthatneedtobefulfilledinaparticularapplication.Thegeneral materialsthatareusedinclude– • Metalslikestainlesssteel,mondel,nickel,inconel,incoloy,andhastalloy • Fillermaterialslikeasbestos,graphite,ceramic,PTFE, andaluminum • Inner ring materials like stainless steel, carbon steel, titanium, monel, nickel, inconel, incoloy, andhastalloy • Wherearespiralwoundgasketsused? • Spiral wound gaskets are used under high temperature and pressure conditions – temperatures up to 2000°F, and pressures from vacuum to the standard 2500 psiflange
ratings. Moreover, these gaskets are highly resilient and flexible, which help the seal to recover and maintain itself under variable working conditions. These properties have helped in using such gaskets for a variety of applications like valves, pressurevessels, heat exchangers, condensers, pipelines, towers, power generation industries, ships, and man- holes andhand-holes. Whatarethedifferenttypesofspiralwoundgasketsavailable? There are many different kinds of spiral wound gaskets available, some of the most commonlyusedonesasbelow. Type R – These gaskets have their inner and outer diameters reinforced with only metal without any filler material, thus providing greater stability and better compression. They areusedintongueandgroove,maleandfemale,andgroovedtoflatfaceflangeassemblies. Type RIR – These gaskets have a solid inner metal ring as a compression stop to fill the annular space between the flange bore and inner diameter. This prevents accumulation of solids, minimizes flange face erosion, and reduces process fluids turbulent flow of process fluids.Thesegasketsaresuitableformaleandfemalepipeflanges. Type CG – These gaskets have an external ring that centers gaskets on flange face for more radial strength, and acts as a compression stop to prevent gasket blowout. They are used forbothflatfaceandraisedfaceflanges. Type CGI – These gaskets are CG styled gaskets fitted with an internal ring that provides additional compression limiting stop, while providing a heat and corrosion barrier, thus preventing flange erosion. They are suitable for use in both flat and raised face flanges, wherecorrosiveandtoxicmediaarepresent. Type CG-RJ – These gaskets are CG types with an outer ring that covers ring joint grooves and prevents the spiral wound portion from entering the groove. They are used only as a maintenance repairitem. Type HE – These gaskets are spiral wound on the outer portion, and are single or double jacketedforpassbar,fastenedtotheIDofthespiralwoundportion.TheHEstandsforHeat Exchanger. Type HE-CG – These gaskets are Heat Exchangers with an outer guide ring and spiral wound primary seal. The outer ring acts as a centering guide andprovides adiitonal radial strength to prevent gasket blowout. It acts as a compression stop, and has excellent resiliency and sealingquality. Type 625 – These gaskets are similar to the basic R-type gaskets with the thickness being 0.0625”.Theyareusedforhighpressuresealinginspacerestrictedapplications.
