Overview: The document provides detailed specifications and applications for IMPERATOR GRAPHITOR GBM® and GFE® metallic gaskets, which are designed for high-performance sealing in various industrial applications, including nuclear and naval sectors.

Specifications: Both GBM® and GFE® gaskets feature a rigid metal core with die-formed expanded graphite rings. The metal core acts as a crushing limiter, ensuring metal-to-metal contact, while the graphite rings provide sealing. The groove profile is trapezoidal, maintaining the ring without adhesives. Standard materials include Stainless 316 L, Monel 400, and Alloy C276, with nuclear applications using RCCM grade materials.

Field of Application: These gaskets are suitable for standardized flanges, difficult piping, steam, coolant, corrosive fluids, and hazardous fluids requiring reduced leakage rates. They are also used in valve body/bonnet connections, safety valves, and apparatus body flanges under severe pressure and temperature conditions.

Operating Conditions: The gaskets operate within a temperature range of -240°C to +650°C and can withstand pressures exceeding 1000 bar for GBM® and 500 bar for GFE®. They maintain performance under non-associated pressure and temperature conditions.

Technical Features: The gaskets recover 10 to 15% of the compressed graphite volume. The minimum seating pressure is 46 MPa for GBM® and 35 MPa for GFE®. Surface finish recommendations vary based on form, with specific Ra values advised for optimal performance.

Approvals and Certificates: Both gasket types are available with nuclear quality graphite, meeting PMUC standards with a purity of 99.85% and low sulfur content.

Sizes and Manufacturing: The maximum diameter for die-formed rings is 800 mm. The gaskets can be manufactured in various shapes, including circular, elliptic, square, or rectangular, according to specific drawings.