A Spiral Wound Gasket (SWG) is a type of industrial sealing product that is commonly used in high-pressure and high-temperature applications. It consists of a metallic strip and a soft filler material, typically made of graphite or PTFE, wound together in a spiral pattern.

The metallic strip is usually made of stainless steel or other alloys with high mechanical strength and corrosion resistance. The filler material is selected based on its ability to withstand the operating conditions of the application, such as temperature, pressure, and chemical exposure.

The spiral wound design provides a high degree of resilience and compression, allowing the gasket to conform to irregular surfaces and maintain a tight seal even under extreme conditions. The outer ring of the gasket is typically made of carbon steel or stainless steel and serves as a compression limiter to prevent over-compression of the gasket.

Spiral Wound Gaskets are widely used in the oil and gas industry, chemical processing, power generation, and other industrial applications where high-pressure and high-temperature sealing is required. They are highly effective at sealing flange connections, valve bonnets, and other critical joints, and are known for their reliability and durability in demanding environments.