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Material profile of novaphit® SSTC TA-LAdvantages of the expanded metal insert usedGasket material made from expanded graphite(purity level 99 %) with internal impregnation and anacid-resistant expanded metal insert made from chromenickelsteel (material no. 1.4404 / AISI 316L).Expanded metal made from acid-resistant stainless steelRust- and acid-resistant material (material no. 1.4404).Thickness of the expanded metal insert usedStretching the stainless steel film used (original thickness0.15 mm) leads to a three-dimensional structure witha projected height of about 0.4 mm, as a result of whichchambering of the gasket core is achieved.applied to the gasket during installation in the flange,i.e. greater tolerance when mistakes are made ininstallation.• Repeated bending of the insert is irreversible becauseof strain hardening, i.e. the insert recovers and is activelyinvolved in the sealing operation! This guarantees greatersecurity in the gasket connection, particularly at highersurface pressure levels.• Another advantage of the new novaphit® SSTC TA-L in directcomparison with smooth metal inserts is its open insertdesign principle. This means that not merely the outergraphite layer but rather that a considerably thicker layeris available to compensate for flange damage.Geometry of the stainless steel insert• Better exploitation of the surface pressure available tocompact the graphite, because no “peaks” need to belevelled. Installation of the gasket is completed faster.• No undercutting in the insert material. The graphite filmencloses the insert completely.• Optimised surface pressure distribution by comparisonwith other insert concepts. This is demonstrated impressivelyby the self-contained lines of higher surface pressure(see the Fuji Film photo of novaphit® SSTC TA-L withexpanded metal).• Favourable grid geometry (diamond dimension = 3.0 mm)makes it possible to produce gaskets of very narrowwidth reliably.• Easy cuttability. Handling benefits in manual and in-housefinishing.• Considerably lower risk of layer separation when bendingoccurs. Even in such a case, the graphite film is pressedaround the insert again completely when pressure isFuji Film photosSensitivity: mediumGasket thickness: 2,0 mmSurface pressure: 30 N/mm 2Frenzelit graphite gasketnovaphit® SSTC TA-L with expanded metalGraphite gasketwith tanged metalGraphite gasketwith smooth metal
Material profile of novaphit® MSTAdvantages of the unique combination of expanded metal and smooth metal insertsMultilayer gasket material made from expanded graphite(purity level 99.5 %) with several expanded metaland smooth metal inserts made from stainless steel(material no. 1.4404 / AISI 316L) and intelligent internalimpregnation.Excellent handlingThanks to the multilayer structure, gaskets made fromnovaphit® MST have extremely good dimensional stabilityproperties and do not buckle. This can be an advantage oversingle-layer, reinforced graphite gaskets.Outstanding adaptabilityThe logical arrangement of the stainless steel inserts isthe special feature of novaphit® MST. 0.5 mm of graphitealternates with stainless steel 1.4404. Expanded metal is,however, chosen for the outer layers on each side. The openstructure of the expanded metal makes the gasket moreadaptable, because the two outer graphite layers can beused to compensate for flange unevenness.New dimension in internal impregnation performanceSystematic improvement in the effectiveness of the internalimpregnation has made it possible to use graphite filmswith optimised initial density. The sealing properties are atthe same time increased as a result, while adaptability issignificantly better.Gasket deformation of about 43 % is achieved with surfacepressure of only 20 MPa. Compared with standard multilayerlaminates, which reach only about 23 %, this means thatadaptability is 87 % higher.Very simple processingThe thickness of the individual stainless steel inserts(0.05 mm) has been chosen carefully to make sure thatextremely reliable and simple processing is possible by allstandard methods.• Punching• Plotting• Water jet cutting• Cutting with circular saws• Cutting with metal shears and even• Cutting with scissorsSurface pressure (MPa)200180160140120100806040Compression chart according to DIN 28090-1novaphit® MSTMultilayer laminate IMultilayer laminate IICrash point,gasket is destroyed2000 5 10 15 20 23 25 30 35 40 43 45 50 55 60Deformation (%)
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