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Material selection of gasket

by:Tronshal     2022-03-17
The material of the gasket is usually made of NBR (nitrile butadiene rubber), SBR (styrene butadiene rubber), HNBR (hydrogenated nitrile rubber), EPDM (EPDM), SILICONE (silica gel), VITON (fluorine rubber) ), CR (Neoprene), FFKM (Perfluoroelastomer), etc. The material of the rubber gasket is NBR nitrile rubber, which is the most commonly used and has the highest cost performance. The use of FFKM perfluoroelastomer gaskets is generally in the more advanced fields, such as the field of aerospace rockets. Because its price is quite expensive, but its performance is excellent and can exceed many metal materials. Description of gaskets 1. Grade C gaskets do not have Ra3.2 and deburring requirements. 2. Grade C is suitable for medium assembly series, Grade A is suitable for fine assembly series 3. G B848-85 is mainly used for cylinder head screws, others are used for standard hexagon bolts, screws and nuts. 4. Material mechanical property grade: steel 200HV; austenitic stainless steel A200. 5. Marking example: standard series, nominal size du003d8mm, flat washer with performance grade of 200HV and no surface treatment: washer GB97.1—85 8 200HV
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