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Generalità sugli O-RingGeneral remarks on O-Rings8

O-Rings basic catalogue - 5082 Identificazione degli O-Ring in elastomero Identification of elastomer O-Rings

Designazione degli elastomeriDesignation of the elastomer O-Rings

Designazione del materialeNome commercialeProduttoreDesignazione breve Material nameTrade nameManufacturerBrief descriptionISO 1629 ASTM D-1418 Elastomero acrilonitrile butadieneBuna N
® Chemische Werke HülsNBRNBR Acrylonitrile butadiene elastomerEuroprene
® Enichem Krynac
® Polysar Ltd. Nipol N
® Nippon Zeon Perbunan N
® Bayer AG Elastomero fluoratoFluorel
® 3M CompanyFPMFKM FluoroelastomerTecnoflon
® Ausimont Viton
® Du Pont Dow Elastomers Elastomero al siliconeElastosil
® Wacker ChemieMVQVMQ Silicone elastomerRhodorsil
® Rhône Poulenc Silastic
® Dow Corning Silopren
® Bayer AG Elastomero etilene-propilene-dieneDutral
® MontedisonEPDMEPDM Ethylene propylene diene elastomerKeltan
® DSM Vistalon
® Exxon Chemical Elastomero cloropreneBaypren
® Bayer AGCRCR Chloroprene elastomerButador
® Rhône Poulenc Neoprene
® Du Pont Dow Elastomers Elastomero di acrilonitrile idrogenatoTherban
® Bayer AGHNBRHSN Hydrogenated acrylonitrile elastomerTornac
® Polysar Ltd. Zetpol
® Nippon ZeonElastomero al fluorosiliconeSilastic
® DuPont Dow ElastomersMFQFVMQ Fluorosilicone elastomer Elastomero perfluoruratoKalrez
® Du Pont Dow Elastomers--FFKM Perfluorelastomer Elastomero acrilicoEuroprene AR
® EnichemACMACM Acrylate elastomerHytemp
® Nippon Zeon Nipol
® Nippon Zeon Elastomero butilicoEsso Butyl
® Esso ChemieIIRIIR Butyl elastomerPolysar Butyl
® Polysar Ltd. Elastomero stirolebutadieneBuna S
® Chemische Werke Hüls SBRSBR Styrene-butadiene elastomerEuroprene
® Enichem Polysar S
® Polysar Ltd. Elastomero poliestere uretanoAdiprene
® UniroyalAU/EUAU/EU Elastomero polietere uretanoUrepan
® Bayer AGPolyesther urethane elastomerVulcollan Polyether urethane elastomerCaucciù naturaleNatsyn
® Bayer AG
® GoodyearNRNR Natural rubber
ISO: International Organisation for Standardisation ASTM: American Society for Testing and Materials

Determinazione delle dimensioni Dimensions Il diametro interno (d

1

) viene determinato con calibri a tampone agradini o, per O-Ring più grandi, con metro a nastro. In caso di necessità è anche possibile determinare la lunghezza stirata dopoil taglio dell’O-Ring; ma in questo caso si deve tenere conto deglierrori di misura.Il diametro della corda (d The internal diameter (d

1

) is best measured with a graduated pluggauge or, for larger O-Rings, a measuring tape. It is also possible,in emergencies, to determine the developed length by cutting the O-Ring, but this method is susceptible to error.The cross-sectional diameter (d

2

) is measured radially and axiallywith feeler gauges without any spring force. Contactless measure -ment with a profile projector is also possible.

2

) viene misurato radialmente ed assial-mente con strumenti di misura senza molla. Sono possibili anchedelle misure senza contatto con un proiettore di profili.