Overview
The D-Type Spiral Wound Gasket with Inner and Outer Rings is a high-performance sealing solution engineered for critical flange connections in piping and pressure vessel systems. It is manufactured to the exacting standards of the HG/T20610-2009 specification, ensuring compatibility and reliability in industrial applications. This specific configuration is designed for a DN40 flange at a PN25 pressure rating, providing a robust metal-to-metal seal capable of withstanding demanding thermal and pressure cycling.
Key Features
Three-layer spiral wound construction for superior sealing resilience D-Type design incorporating both inner and outer containment rings Primary sealing element wound from 304 stainless steel and flexible graphite Inner and outer rings constructed from solid 304 stainless steel Engineered to handle high bolt loads and prevent gasket blow-out Excellent resistance to a wide range of chemicals, solvents, and steam Provides reliable sealing under variable temperature and pressure conditions
Specifications
Gasket Type: D-Type Spiral Wound with Inner & Outer Rings Nominal Pipe Size: DN40 Pressure Class: PN25 Flange Standard: HG/T20610-2009 Winding Material: 304 Stainless Steel and Graphite Filler Inner Ring Material: 304 Stainless Steel Outer Ring Material: 304 Stainless Steel Inside Diameter: 1.93 inches Outside Diameter: 3.62 inches Overall Thickness: 0.18 inches Winding Identification Code: D2222 Quantity: 1 piece
Applications
Sealing chemical and petrochemical processing flanges High-pressure steam lines and boiler feed systems Refinery and pipeline valve bonnets and connections Heat exchangers, reactors, and other pressure vessels Applications requiring a resilient seal for flanges subject to thermal cycling General industrial service for fluids, gases, and steam
