Spiral wound gaskets (SWG)
Gaskets wound from alternating V- or W-shaped layers of profiled cold-rolled corrosion-resistant metal strip and soft filler strip. They keep the joint tight at high pressures and temperatures up to +1093 °C.
Product information
The filler is expanded graphite, PTFE or ceramic. The winding strip is made to GOST 4986-79 from 12Kh18N10T, 12Kh18N9, 08Kh18N10T, 10Kh17N13M2T, 10Kh17N13M3T steels, Hastelloy, Monel and others. Limiting rings that protect the sealing element from over-compression are made to GOST 5632-72 from corrosion-resistant 12Kh18N10T, 08Kh18N10T, 10Kh17N13M2T steels and others. Strip and ring materials and the filler type are agreed with the customer.
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Non-standard gaskets are made to the customer's drawings.
Compliance
- ГОСТ 4986-79
- ГОСТ 5632-72
Advantages
- Stay tight at temperatures up to +1093 °C
- Limiting rings prevent over-compression
- Materials and filler agreed with the customer
Gasket types
- 1Type ABasic, no limiting ring. Tongue-and-groove flange (4–5).
- 2Type BNo limiting ring. Male-and-female flange (2–3).
- 3Type VWith inner limiting ring. Male-and-female flange (2–3).
- 4Type GWith outer limiting ring. Flat sealing face (1–1).
- 5Type DWith outer and inner limiting rings. Flat sealing face (1–1).
Technical specifications
Products can also be manufactured to the customer's drawings and technical requirements, including larger diameters.
| Working temperature | up to +1093°C |
|---|---|
| Filler | Expanded graphite, PTFE, ceramic |
| Winding strip | 12Kh18N10T, 12Kh18N9, 08Kh18N10T, 10Kh17N13M2T, 10Kh17N13M3T, Hastelloy, Monel |
| Limiting ring thickness | 2.4 + 0.1 or 3.0 + 0.3mm |
| Sealing element thickness | 4.45mm |
| Classes (size tables) | 150 / 300 / 400 / 600 / 900 / 1500 / 2500 |
| Marking | СНП-Д-3-d1-d2-d3-d4-S1-PN |
Non-standard gaskets are made to the customer's drawings.
Request this product
Send us the diameter, operating conditions and timeline — we will reply with an engineering review and an indicative price.
Size tables
Data from the 2025 factory catalogue. All dimensions in mm. Products can be manufactured to the customer's drawings and technical requirements, including larger diameters, based on the specific operating conditions.
SWG dimensions — Class 150, 2 MPa
| Nominal size | DN | d1 — inner ring, mm | d2 — sealing element ID, mm | d3 — sealing element OD, mm | d4 — outer ring, mm |
|---|---|---|---|---|---|
| 1/2" | 15 | 14.2 | 19.1 | 31.8 | 47.8 |
| 3/4" | 20 | 20.6 | 25.4 | 39.6 | 57.2 |
| 1" | 25 | 26.9 | 31.8 | 47.8 | 66.8 |
| 1¼" | 32 | 38.1 | 47.8 | 60.5 | 76.2 |
| 1½" | 40 | 44.5 | 54.1 | 69.9 | 85.9 |
| 2" | 50 | 55.6 | 69.9 | 85.9 | 104.9 |
| 2½" | 65 | 66.5 | 82.6 | 98.6 | 124 |
| 3" | 80 | 81 | 101.6 | 120.7 | 136.7 |
| 4" | 100 | 106.4 | 127 | 149.4 | 174.8 |
| 5" | 125 | 131.8 | 155.7 | 177.8 | 196.9 |
| 6" | 150 | 157.2 | 182.6 | 209.6 | 222.3 |
| 8" | 200 | 215.9 | 233.4 | 263.7 | 279.4 |
| 10" | 250 | 268.2 | 287.3 | 317.5 | 339.9 |
| 12" | 300 | 317.5 | 339.9 | 374.7 | 409.7 |
| 14" | 350 | 349.3 | 371.6 | 406.4 | 450.9 |
| 16" | 400 | 400.1 | 422.4 | 463.6 | 514.4 |
| 18" | 450 | 449.3 | 474.7 | 527.1 | 549.4 |
| 20" | 500 | 500.1 | 525.5 | 577.9 | 606.6 |
| 24" | 600 | 603.3 | 628.7 | 685.8 | — |
Gasket with inner and outer rings. Inner and outer ring thickness 2.97–3.33 mm, sealing element 4.45 mm. “—” — value being confirmed.
SWG dimensions — Class 300, 5 MPa
| Nominal size | DN | d1 — inner ring, mm | d2 — sealing element ID, mm | d3 — sealing element OD, mm | d4 — outer ring, mm |
|---|---|---|---|---|---|
| 1/2" | 15 | 14.2 | 19.1 | 31.8 | 54.1 |
| 3/4" | 20 | 20.6 | 25.4 | 39.6 | 66.8 |
| 1" | 25 | 26.9 | 31.8 | 47.8 | 73.2 |
| 1¼" | 32 | 38.1 | 47.8 | 60.5 | 82.6 |
| 1½" | 40 | 44.5 | 54.1 | 69.9 | 95.3 |
| 2" | 50 | 55.6 | 69.9 | 85.9 | 111.3 |
| 2½" | 65 | 66.5 | 82.6 | 98.6 | 130.3 |
| 3" | 80 | 81 | 101.6 | 120.7 | 149.4 |
| 4" | 100 | 106.4 | 127 | 149.4 | 181.1 |
| 5" | 125 | 131.8 | 155.7 | 177.8 | 215.9 |
| 6" | 150 | 157.2 | 182.6 | 209.6 | 251 |
| 8" | 200 | 215.9 | 233.4 | 263.7 | 308.1 |
| 10" | 250 | 268.2 | 287.3 | 317.5 | 362 |
| 12" | 300 | 317.5 | 339.9 | 374.7 | 422.4 |
| 14" | 350 | 349.3 | 371.6 | 406.4 | 485.9 |
| 16" | 400 | 400.1 | 422.4 | 463.6 | 539.8 |
| 18" | 450 | 449.3 | 474.7 | 527.1 | 596.9 |
| 20" | 500 | 500.1 | 525.6 | 577.9 | 654.1 |
| 24" | 600 | 603.3 | 628.7 | 685.8 | 774.7 |
Gasket with inner and outer rings. Inner and outer ring thickness 2.97–3.33 mm, sealing element 4.45 mm. “—” — value being confirmed.
SWG dimensions — Class 400, 6.4 MPa
| Nominal size | DN | d1 — inner ring, mm | d2 — sealing element ID, mm | d3 — sealing element OD, mm | d4 — outer ring, mm |
|---|---|---|---|---|---|
| 1/2" | 15 | 14.2 | 19.1 | 31.8 | 54.1 |
| 3/4" | 20 | 20.6 | 25.4 | 39.6 | 66.8 |
| 1" | 25 | 26.9 | 31.8 | 47.8 | 73.2 |
| 1¼" | 32 | 38.1 | 47.8 | 60.5 | 82.6 |
| 1½" | 40 | 44.5 | 54.1 | 69.9 | 95.3 |
| 2" | 50 | 55.6 | 69.9 | 85.9 | 111.3 |
| 2½" | 65 | 66.5 | 82.6 | 98.6 | 130.3 |
| 3" | 80 | 81 | 101.6 | 120.7 | 149.4 |
| 4" | 100 | 102.6 | 120.7 | 149.4 | 177.8 |
| 5" | 125 | 128.3 | 147.6 | 177.8 | 212.9 |
| 6" | 150 | 154.9 | 174.8 | 209.6 | 247.7 |
| 8" | 200 | 205.7 | 225.6 | 263.7 | 304.8 |
| 10" | 250 | 255.3 | 274.6 | 317.5 | 358.9 |
| 12" | 300 | 307.3 | 327.2 | 374.7 | 419.1 |
| 14" | 350 | 342.9 | 362 | 406.4 | 482.6 |
| 16" | 400 | 389.9 | 412.8 | 463.6 | 536.7 |
| 18" | 450 | 438.2 | 469.9 | 527.1 | 593.9 |
| 20" | 500 | 489 | 520.7 | 577.9 | 647.7 |
| 24" | 600 | 590.6 | 628.7 | 685.8 | 768.4 |
Gasket with inner and outer rings. Inner and outer ring thickness 2.97–3.33 mm, sealing element 4.45 mm. “—” — value being confirmed.
SWG dimensions — Class 600, 10 MPa
| Nominal size | DN | d1 — inner ring, mm | d2 — sealing element ID, mm | d3 — sealing element OD, mm | d4 — outer ring, mm |
|---|---|---|---|---|---|
| 1/2" | 15 | 14.2 | 19.1 | 31.8 | 54.1 |
| 3/4" | 20 | 20.6 | 25.4 | 39.6 | 66.8 |
| 1" | 25 | 26.9 | 31.8 | 47.8 | 73.2 |
| 1¼" | 32 | 38.1 | 47.8 | 60.5 | 82.6 |
| 1½" | 40 | 44.5 | 54.1 | 69.9 | 95.3 |
| 2" | 50 | 55.6 | 69.9 | 85.9 | 111.3 |
| 2½" | 65 | 66.5 | 82.6 | 98.6 | 130.3 |
| 3" | 80 | 78.7 | 101.6 | 120.7 | 149.4 |
| 4" | 100 | 102.6 | 120.7 | 149.4 | 193.8 |
| 5" | 125 | 128.3 | 147.6 | 177.8 | 241.3 |
| 6" | 150 | 154.9 | 174.8 | 209.6 | 266.7 |
| 8" | 200 | 205.7 | 225.6 | 263.7 | 320.8 |
| 10" | 250 | 255.3 | 274.6 | 317.5 | 400.1 |
| 12" | 300 | 307.3 | 327.2 | 374.7 | 457.2 |
| 14" | 350 | 342.9 | 362 | 406.4 | 492.3 |
| 16" | 400 | 389.9 | 412.8 | 463.6 | 565.2 |
| 18" | 450 | 438.2 | 469.9 | 527.1 | 612.9 |
| 20" | 500 | 489 | 520.7 | 577.9 | 682.8 |
| 24" | 600 | 590.6 | 628.7 | 685.8 | 790.7 |
Gasket with inner and outer rings. Inner and outer ring thickness 2.97–3.33 mm, sealing element 4.45 mm. “—” — value being confirmed.
SWG dimensions — Class 900, 15 MPa
| Nominal size | DN | d1 — inner ring, mm | d2 — sealing element ID, mm | d3 — sealing element OD, mm | d4 — outer ring, mm |
|---|---|---|---|---|---|
| 1/2" | 15 | 14.2 | 19.1 | 31.8 | 63.5 |
| 3/4" | 20 | 20.6 | 25.4 | 39.6 | 69.9 |
| 1" | 25 | 26.9 | 31.8 | 47.8 | 79.5 |
| 1¼" | 32 | 33.3 | 39.6 | 60.5 | 88.9 |
| 1½" | 40 | 41.4 | 47.8 | 69.9 | 98.6 |
| 2" | 50 | 52.3 | 58.7 | 85.9 | — |
| 2½" | 65 | 63.5 | — | 98.6 | 165.1 |
| 3" | 80 | 78.7 | 95.3 | 120.7 | 168.4 |
| 4" | 100 | 102.6 | 120.7 | 149.4 | 206.5 |
| 5" | 125 | 128.3 | 147.6 | 177.8 | 247.7 |
| 6" | 150 | 154.9 | 174.8 | 209.6 | 289.1 |
| 8" | 200 | 196.9 | 222.3 | 257.3 | 358.9 |
| 10" | 250 | 246.1 | 276.4 | 311.2 | 435.1 |
| 12" | 300 | 292.1 | 323.9 | 368.3 | 498.6 |
| 14" | 350 | 320.8 | 355.6 | 400.1 | 520.7 |
| 16" | 400 | 374.7 | 412.8 | 447.2 | 574.8 |
| 18" | 450 | 425.5 | 463.6 | 520.7 | 638.3 |
| 20" | 500 | 482.6 | 520.7 | 571.5 | 698.5 |
| 24" | 600 | 590.6 | 628.7 | 679.5 | 838.2 |
Gasket with inner and outer rings. Inner and outer ring thickness 2.97–3.33 mm, sealing element 4.45 mm. “—” — value being confirmed.
SWG dimensions — Class 1500, 25 MPa
| Nominal size | DN | d1 — inner ring, mm | d2 — sealing element ID, mm | d3 — sealing element OD, mm | d4 — outer ring, mm |
|---|---|---|---|---|---|
| 1/2" | 15 | 14.2 | 19.1 | 31.8 | 63.5 |
| 3/4" | 20 | 20.6 | 25.4 | 39.6 | 69.9 |
| 1" | 25 | 26.9 | 31.8 | 47.8 | 79.5 |
| 1¼" | 32 | 33.3 | 39.6 | 60.5 | 88.9 |
| 1½" | 40 | 41.4 | 47.8 | 69.9 | 98.6 |
| 2" | 50 | 52.3 | 58.7 | 85.9 | — |
| 2½" | 65 | 63.5 | 69.9 | 98.6 | 165.1 |
| 3" | 80 | 78.7 | 92.2 | 120.7 | 174.8 |
| 4" | 100 | 97.8 | 117.6 | 149.4 | 209.6 |
| 5" | 125 | 124.5 | — | 177.8 | 254 |
| 6" | 150 | 147.3 | 171.5 | 209.6 | 282.7 |
| 8" | 200 | 196.9 | 215.9 | 257.3 | 352.6 |
| 10" | 250 | 246.1 | 266.7 | 311.2 | 435.1 |
| 12" | 300 | 292.1 | 323.9 | 368.3 | 520.7 |
| 14" | 350 | 320.8 | 362 | 400.1 | 577.9 |
| 16" | 400 | 374.7 | 406.4 | 457.2 | 641.4 |
| 18" | 450 | 425.5 | 463.6 | 520.7 | 704.9 |
| 20" | 500 | 476.3 | 514.4 | 571.5 | 755.7 |
| 24" | 600 | 577.9 | 616 | 679.5 | 901.7 |
Gasket with inner and outer rings. Inner and outer ring thickness 2.97–3.33 mm, sealing element 4.45 mm. “—” — value being confirmed.
SWG dimensions — Class 2500, 42 MPa
| Nominal size | DN | d1 — inner ring, mm | d2 — sealing element ID, mm | d3 — sealing element OD, mm | d4 — outer ring, mm |
|---|---|---|---|---|---|
| 1/2" | 15 | 14.2 | 19.1 | 31.8 | 69.9 |
| 3/4" | 20 | 20.6 | 25.4 | 39.6 | 76.2 |
| 1" | 25 | 26.9 | 31.8 | 47.8 | 85.9 |
| 1¼" | 32 | 33.3 | 39.6 | 60.5 | 104.9 |
| 1½" | 40 | 41.4 | 47.8 | 69.9 | 117.6 |
| 2" | 50 | 52.3 | 58.7 | 85.9 | — |
| 2½" | 65 | 63.5 | 69.9 | 98.6 | 168.4 |
| 3" | 80 | 78.7 | 92.2 | 120.7 | 196.9 |
| 4" | 100 | 97.8 | 117.6 | 149.4 | 235 |
| 5" | 125 | 124.5 | — | 177.8 | 279.4 |
| 6" | 150 | 147.3 | 171.5 | 209.6 | 317.5 |
| 8" | 200 | 196.9 | 215.9 | 257.3 | 387.4 |
| 10" | 250 | 246.1 | 270 | 311.2 | 476.3 |
| 12" | 300 | 292.1 | 317.5 | 368.3 | 549.4 |
Gasket with inner and outer rings. Inner and outer ring thickness 2.97–3.33 mm, sealing element 4.45 mm. “—” — value being confirmed.
Field of application
Sealing flanged joints in the chemical, petrochemical, gas and power industries.
- Chemical industry
- Petrochemicals
- Gas industry
- Power generation