Overview
This D-type spiral wound gasket with inner and outer rings is a precision sealing component designed for high-integrity flanged connections in demanding process environments. It is manufactured to the exacting requirements of the HG/T20631-2009 standard, ensuring dimensional consistency and reliable performance in critical applications. The gasket is engineered to create a robust, leak-tight seal in systems operating under high pressure and temperature, making it an essential component for maintenance, repair, and operations (MRO) and original equipment manufacturing (OEM) use.
Key Features
Constructed with a 304 stainless steel outer ring for structural integrity and crush resistance. Features a resilient, high-purity graphite filler for excellent thermal conductivity and sealing performance. Utilizes a 316L stainless steel inner ring for enhanced corrosion resistance against a wide range of media. Designed for a 900 lb pressure class, suitable for high-pressure piping and vessel applications. The spiral wound design allows for compression and recovery, accommodating system fluctuations. D-type configuration with inner and outer rings provides guidance and prevents gasket blow-out.
Specifications
Material Construction: 304 Stainless Steel (Outer Ring), Graphite (Filler), 316L Stainless Steel (Inner Ring) Nominal Size: 1.31 inches Pressure Class: 900 lb Gasket Type: D-type with Inner and Outer Rings Compliance Standard: HG/T20631-2009 Design Designation: D2525 Pack Quantity: 25 pieces
Applications
High-pressure piping systems in chemical and petrochemical processing. Power generation facilities, including steam and turbine systems. Oil and gas refining and transmission infrastructure. Industrial heating and cooling systems with elevated temperature requirements. General industrial plant maintenance for pumps, valves, heat exchangers, and reactor flanges.
