Key Specifications / Parameters Parameter Detail Part Number RGASKETX312 Product Type Gasket Set (bonnet gasket, seat ring gasket, shims) Valve Size Fitment Approximately 1″ nominal (Type E valve body) Service Temperature Range ‑100 °F (‑73 °C) to +450 °F (~232 °C) Materials / Construction Stainless steel/graphite or equivalent sheet gasket material Typical Kit Contents Bonnet gasket OD ~2.91 in; Spiral gasket OD ~2.50 in; Seat‑ring gasket OD ~2.22 in Application Maintenance or repair of body/bonnet and seat‑ring joints in small‑bore control valves