Overview
This D-type spiral wound gasket is engineered for high-pressure, high-temperature sealing in critical industrial piping and vessel applications. It is constructed with a robust metal winding and flexible filler, held securely by integral inner and outer retaining rings. This design ensures precise alignment during installation and prevents the winding from buckling under extreme pressure or vacuum conditions. The gasket is manufactured to recognized industry standards for dimensional consistency and reliable performance in demanding environments.
Key Features
D-type construction with inner and outer carbon steel retaining rings Spiral wound with 316 stainless steel for excellent corrosion resistance Center filled with flexible, high-purity graphite for a reliable seal Engineered for high-pressure service up to PN 25 (approximately 362.5 PSI)
Retaining rings provide structural stability and prevent winding collapse
Suitable for a wide range of temperatures and aggressive media
Specifications
Nominal Size: DN 20 Outside Diameter: 4.5 inches Inside Diameter: 2.25 inches Overall Thickness: 0.18 inches Winding Material: 316 Stainless Steel Filler Material: Flexible Graphite Retaining Ring Material: Carbon Steel Pressure Rating: PN 25 (~362.5 PSI) Standard: HG/T 20610-2009 Pack Quantity: 12
Applications
Sealing for pumps, valves, compressors, and heat exchangers High-pressure process piping in chemical and petrochemical plants
Power generation and utility systems
Oil and gas pipeline flanges General industrial service on ANSI/DIN standard flanges
