Technical Specifications Category Specification Fisher Part Number RGASKET X252 Description Spiral-Wound Gasket Gasket Type Spiral-Wound Primary Application Fisher Control Valve Bonnet Flange & Body Flange Connections Pressure Class Suitable for ANSI Class 150, 300, 600, or higher. The exact class is defined by the gasket dimensions. Metallic Winding Material 304 Stainless Steel (standard), 316 Stainless Steel, or other alloys. Filler Material Flexible Graphite (for high-temperature service) or PTFE (for chemical service). Inner & Outer Ring Typically Carbon Steel or Stainless Steel. Dimensions Defined by the "X252" code, specifying the precise Inside Diameter (ID) and Outside Diameter (OD).
