Overview
This D-shape metallic spiral wound gasket is engineered for critical sealing in high-pressure and high-temperature industrial piping systems. It is specifically designed for use on oval or irregular flanges where a standard round gasket is not applicable. The construction utilizes a precision-wound spiral of 316L stainless steel with a resilient graphite filler, creating a robust seal capable of accommodating flange rotation and surface irregularities. Manufactured to recognized industry standards, this gasket provides dependable performance in demanding chemical, petrochemical, and power generation applications.
Key Features
D-shape profile for sealing on non-circular flange faces
Spiral wound construction with alternating metal and filler layers Primary sealing element made from 316L stainless steel for corrosion resistance
Flexible graphite filler for excellent thermal conductivity and seal resilience Integral inner and outer retaining rings for controlled compression and prevention of over-gasketing
Suitable for both indoor and outdoor service environments
Specifications
Gasket Type: Metallic Spiral Wound Shape: D-Type with Inner and Outer Rings Nominal Pipe Size: DN40 (approximately 1.5 inches) Pressure Class: PN40 (approximately 580 PSI) Material Construction: 316L Stainless Steel Windings / Graphite Filler / 316L Steel Rings Standard: HG/T20610-2009, D4424 Approximate Outer Dimensions: 7.2 inches by 3.6 inches Approximate Cross-Section Width: 4.5 inches Approximate Thickness: 0.18 inches Pack Quantity: 8 gaskets
Applications
Sealing for pumps, valves, and compressors with oval flanges High-pressure piping systems in chemical processing plants
Heat exchanger and boiler connections in power generation
Refinery and petrochemical infrastructure General industrial maintenance for irregular flange faces
