Specification of Spiral Wound Metallic Gaskets
Stainless Steel Spiral Wound Gaskets : SS 304 / 304L / 316 / 316L / 321 / 347 / 904L
High Nickel Spiral Wound Gaskets : MONEL 400 / K500 / INCONEL 600 / 625 / 800 / 825
Spiral Wound Gasket Dimensions
| Class 150 NPS 1/2-24 | ||||
| NPS | Inner Ring | Sealing Element | Outer Ring | |
| d1 | d2 | d3 | d4 | |
| 1/2 | 14.2 | 19.1 | 31.8 | 47.8 |
| 3/4 | 20.6 | 25.4 | 39.6 | 57.2 |
| 1 | 26.9 | 31.8 | 47.8 | 66.8 |
| 1.1/4 | 38.1 | 47.8 | 60.5 | 76.2 |
| 1.1/2 | 44.5 | 54.1 | 69.9 | 85.9 |
| 2 | 55.6 | 69.9 | 85.9 | 104.9 |
| 2.1/2 | 66.5 | 82.6 | 98.6 | 124 |
| 3 | 81 | 101.6 | 120.7 | 136.7 |
| 4 | 106.4 | 127 | 149.4 | 174.8 |
| 5 | 131.8 | 155.7 | 177.8 | 196.9 |
| 6 | 157.2 | 182.6 | 209.6 | 222.3 |
| 8 | 215.9 | 233.4 | 263.7 | 279.4 |
| 10 | 268.2 | 287.3 | 317.5 | 339.9 |
| 12 | 317.5 | 339.9 | 374.7 | 409.7 |
| 14 | 349.3 | 371.6 | 406.4 | 450.9 |
| 16 | 400.1 | 422.4 | 463.6 | 514.4 |
| 18 | 449.3 | 474.7 | 527.1 | 549.4 |
| 20 | 500.1 | 525.5 | 577.9 | 606.6 |
| 24 | 603.3 | 628.7 | 685.8 | 717.6 |
| NPS | d1 | d2 | d3 | d4 |
| Inner Ring | Sealing Element | Outer Ring | ||
Spiral Wound Gasket Compression
| Nom. Thickness Compressed Thickness | |
| 2.5 mm(.098 in) | 1.9/2.1mm(.075/.085 in) |
| 3.2 mm(.125 in) | 2.4/2.6mm(.095/.105 in) |
| 4.5 mm(.175 in) | 3.2/3.45mm(.125/.135 in) |
| 6.4 mm(.250 in) | 4.6/4.8mm(.180/.190 in) |
| 7.3 mm(.285 in) | 4.7/4.9mm(.185/.195 in) |
Available Spiral Wound Gasket Shapes
| SWR | Spiral Wound Metaillic Gasket without centering ring |
| SCD | Spiral Wound Metallic Gasket with centering device |
| SOR | Spiral Wound Metallic Gasket with centering ring. (Centering ring made of carbon steel stainless steel and other metals) |
| SIO | Spiral Wound Metallic Gasket with inner & outer rings. (Rings are made of carbon steel stainless steel and other metals) |
| SIOH | Spiral Wound Metallic Gasket with outer ring supplied with bolt holes and inner rings |
| SIR | Spiral Wound Metallic Gasket with inner rings. (Rings generally of stainless steel) |