Table 2 Major ISO Standards for Seals | Trends of standardization of seals | General-purpose seal technology | Technologies | NOK CORPORATION

Category Standards For O-rings ISO 3601-1 Sealing devices – O-rings — Inside diameters, cross-sections, tolerances and size identification code ISO 3601-3 Sealing devices – O-rings – Quality acceptance criteria For oil seals ISO 6194-1 Rotary shaft lip type seals – Nominal dimensions and Tolerances ISO 6194-2 Rotary shaft lip type seals – Vocabulary ISO 6194-3 Rotary shaft lip type seals – Storage, handling and Installation ISO 6194-4 Rotary shaft lip type seals – Performance test Procedures ISO 6194-5 Rotary shaft lip type seals – Identification of Visual Imperfections For gaskets ISO 3939 Multiple lip packing sets – Methods for measuring Stack heights ISO 5597 Cylinders – Housings for piston and rod seals in Reciprocating applications – Dimensions and Tolerances ISO 6195 Cylinders – Housings for rod wiper rings in Reciprocating applications – Dimensions and Tolerances ISO 7986 Sealing devices – Standard test methods to assess the performance of seals used in oil hydraulic reciprocating applications ISO 10766 Cylinders – Housing dimensions for rectangular-cut bearing rings for pistons and rods Other ISO 48 Rubber, vulcanized or thermoplastic －Determination of hardness(hardness between 10 IRHD and 100 IRHD) ISO 188 Rubber, Vulcanized － Accelerated ageing or heat-resistance test ISO 1629 Rubber and latices － Nomenclature ISO 2230 Vulcanized rubber － Guide to storage ISO 4287 Geometrical Product Specifications(GPS) － Surface texture : Profile method － Terms, definitions and surface texture parameters ISO 4288 Geometrical Product Specifications(GPS) － Surface texture : Profile method － Rules and procedures for the assessment of surface texture ISO 6547 Cylinders – Piston seal housings incorporating Bearing ring – Dimensions and tolerances