Spiral Wound Gasket

Spiral Wound Gasket is the ideal gasket in the semi-metallic category. A narrow strip of V-shap metal hoop is spirally wound under tension with a filler cushion between the lami nation of the metal and is spot-welded at both ends.

This unique construction of a spring-like metal and soft filler provides gasket excel-lent characteristics.

Resistance to high temperature and high pressures.
Great resilience which allows the gasket to adjust automatically to change in operating conditions, such as pressure and thermal shocks, vibrations etc.

Excellent sealability is maintained with comparatively small gasket area.
Good tolerance for flange surface finish irregularities.
Can be designed to any dimensions economically in circular or moderately noncircular shape.
Available in a variety of hoop metals and filler materials to satisfy specific operating conditions.

Type Cross section Hoop material Filler material Inner, Outer ring ma Normal Thickness Basic type SUS304,316,321Ti,Monel etc. As specified Stainless steel tape. Asbestos Carbon steel sheetor SUS304,306 etc. As specified sheet V-shaped W-shaped With inner ring Non-asbestos 3.2 4.5 2.5 4.8 5.5 7.5 With outer ring Expanded graphite With inner & out ring PTFE

Type Hoop material Asbestos Non-asbestos Graphite PTFE Basic type SUS304 104 204 304 404 SUS316 106 206 306 406 As specified 109 209 309 409 With inner ring SUS304 114 214 314 414 SUS316 116 216 316 416 As specified 119 219 319 419 With outer ring SUS304 124 224 324 424 SUS316 126 226 326 426 As specified 129 229 329 429 With inner & out ring SUS304 134 234 334 434 SUS316 136 236 336 436 As specified 139 239 339 439