Spiral Wound Gaskets
Spiral Wound Gaskets are versatile and adaptable to a wide range of operating conditions. These gaskets combine a profiled metal strip with filler materials like graphite, PTFE, or mica, offering excellent sealing properties. The combination of these materials ensures resistance to high pressure, extreme temperatures, and corrosive environments. Metallic inner and outer rings can be added based on application requirements for increased stability and durability. Ideal for applications in refineries, power plants, and chemical industries, spiral wound gaskets provide reliable, long-lasting performance under demanding conditions.
The winding of a spiral wound gasket is the active sealing part, consisting of alternating layers of a formed metal strip and a soft filler material. The filler material is selected based on the application's pressure, temperature, and fluid type. To maintain tension, several consecutive turns of the metal strip are welded together at both the start and end of the winding. This structure ensures a secure, reliable seal in various operating conditions.
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Temperature & Color of Special Materials
Gaskets are color-coded for easy identification and selection. The color on the outer edge of the centering ring indicates both the winding material and the filler material:
SPIRAL WOUND GASKETS – TYPES AVAILABLE
| Type | Product Description | Applications |
|---|---|---|
| CGI | Spiral Wound Metallic Gasket with inner and outer rings, where the rings are made from the materials like carbon steel, stainless steel and other alloy metals. | General-purpose sealing in diverse applications. |
| CG | Spiral Wound Metallic Gasket with centering outer ring. | This gasket type is well-suited for flange connections in diverse industries. |
| GI | Spiral Wound Metallic Gasket with inner rings, typically as same as winding material. | Ideal for applications requiring enhanced internal support and stability. |
| G | Spiral Wound Metallic Gasket without a centering outer ring & inner ring. | Suitable for flanges with well-aligned bolt holes, where a centering outer ring & inner ring is unnecessary. |
SPIRAL WOUND GASKETS – Nominal Gasket Thickness & Compression Thickness Reference
| Sl.No | Nominal Thickness | Compressed Thickness |
|---|---|---|
| 1 | 3.20 mm (0.126 in) | 2.40 mm – 2.60 mm (0.095 – 0.105) in |
| 2 | 4.45 mm (0.175 in) | 3.17 mm – 3.43 mm (0.124 – 0.135) in |
| 3 | 6.35 mm (0.250 in) | 4.60 mm – 4.80 mm (0.180 – 0.190) in |
| Note : This compressed thickness after applying of compression load as per ASME B16.20 | ||
| Edn 2017, for gasket thickness 4.45 mm the require compression thickness is min 3.43 mm | ||
