S.K. Fitting Valve offers three options:
- TOMBO VORTEX by NICHIAS: Model 1804 is the basic type, 1834 has an outer ring, and 1834R has both inner and outer rings.
- Lower-cost gaskets: An alternative for projects with tighter budgets.
- Custom-made gaskets: For dimensions or constructions outside the standard range, manufactured to the required drawing and specification.
Available constructions include a basic type without reinforcing rings, an outer-ring type, and an inner-and-outer-ring type that also helps prevent inward buckling of the winding.
TOMBO VORTEX 1804
A metal winding and sealing filler, with no inner or outer ring.
| Manufacturer / brand |
NICHIAS / TOMBO VORTEX |
| Model |
1804 |
| Construction |
Basic type, without reinforcing rings |
| Inner ring |
None |
| Outer ring |
None |
| Winding material (hoop) |
SUS304 |
| Filler material |
NA — Non-asbestos inorganic paper (NA VORTEX)
GR — Expanded graphite (GRASEAL VORTEX) |
| Flange facing |
Tongue & Groove (T&G): the basic gasket body is located within the flange groove. |
| Standard |
JIS B 2404-2018 for T&G; JPI-7S-41-2018 for T&G. Use the dimensions specifically listed for grooved flanges. |
| Size |
JIS T&G: 10A–600A (3/8–24 in); JPI T&G: 15A–600A (1/2–24 in), at the nominal sizes listed in the tables. Select gasket-body inside diameter D2 and outside diameter D3. |
| Thickness — gasket body |
4.5 mm |
Full specification sheets: NICHIAS — Gaskets (PDF)
NICHIAS — Gasket Dimensions (PDF)
TOMBO VORTEX 1834
| Manufacturer / brand |
NICHIAS / TOMBO VORTEX |
| Model |
1834 |
| Construction |
With outer guide ring |
| Inner ring |
None |
| Outer ring |
Yes |
| Winding material (hoop) |
SUS304 |
| Filler and ring materials |
Filler: NA — Non-asbestos inorganic paper (NA VORTEX), for the construction without an inner ring, subject to the manufacturer’s conditions.
Ring: Carbon Steel (S); Stainless Steel 304 (E), 316 (G), 304L (L), 316L (H) |
| Flange facing |
Raised Face (RF), or Flat Face (FF) with sufficient strength, subject to the manufacturer’s conditions for omitting an inner ring. |
| Standard |
JIS B 2404-2018; JPI-7S-41-2018; ASME B16.20-2017 for ASME B16.5 flanges. Use D2, D3 and D4 for the outer-ring construction. |
| Size |
JIS 10K/16K/20K: 10A–600A; JIS 30K/40K: 10A–400A
ASME Class 150/300/600: 15A–600A (1/2–24 in); Class 400: 100A–600A (4–24 in).
The manufacturer limits omission of the inner ring to nominal sizes of 600A (24 in) or smaller. |
| Pressure Class |
JIS: 10K, 16K, 20K, 30K, 40K
ASME: Class 150, 300, 400, 600
For NA grade and nominal sizes up to 600A (24 in) |
| Thickness — gasket body |
4.5 mm |
Full specification sheets: NICHIAS — Gaskets (PDF)
NICHIAS — Gasket Dimensions (PDF)
TOMBO VORTEX 1834R
| Manufacturer / brand |
NICHIAS / TOMBO VORTEX |
| Model |
1834R |
| Construction |
With inner and outer rings |
| Inner ring |
Yes |
| Outer ring |
Yes |
| Winding material (hoop) |
SUS304 |
| Filler and ring materials |
Filler: NA — Non-asbestos inorganic paper (NA VORTEX), or GR — Expanded graphite (GRASEAL VORTEX).
Ring: Carbon Steel (S); Stainless Steel 304 (E), 316 (G), 304L (L), 316L (H) |
| Flange facing |
Raised Face (RF), or Flat Face (FF) with sufficient strength, using both inner and outer rings. |
| Standard |
JIS B 2404-2018; JPI-7S-41-2018; ASME B16.20-2017 for ASME B16.5 flanges. Specify D1, D2, D3 and D4. |
| Size |
JIS 10K/16K/20K: 10A–600A; JIS 30K/40K/63K: 10A–400A
ASME Class 150/300/600/1500: 15A–600A (1/2–24 in); Class 400: 100A–600A; Class 900: 80A–600A; Class 2500: 15A–300A (1/2–12 in). |
| Pressure Class |
JIS: 10K, 16K, 20K, 30K, 40K, 63K
ASME: Class 150, 300, 400, 600, 900, 1500, 2500 |
| Thickness — gasket body |
4.5 mm |
Full specification sheets: NICHIAS — Gaskets (PDF)
NICHIAS — Gasket Dimensions (PDF)
