Product Name: R-Series Ring Joint Gaskets Model NO.: R11 to R105 Spring Washer Type: Standard Combination Washer Structure: Graphite Filler metal Jacketed Material: Stainless Steel Type: Flat Gasket Shape: with Rib or Round Trademark: Rilson Transport Package: Wooden Case Origin: China HS Code: 7318220001 Product Description Ring joint gasketsThe R-Type ring gasket can be ordered to two different profiles, oval or octagonal in cross-sections. Both types have identical pitch diameter as the flange groove they correspond to. These gaskets are used in pressures up to 10, 000 PSI. The octagonal type has a higher sealing coeffient than the oval, therefore being the better gasket of the two. The oval type is the only gasket that will fit a bottom radiused groove. Flanges with flat bottom v-grooves will accept either style. Gaskets that have been torqued initiating a metal-to-metal seal should be discarded and not reused.