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Product name: BLACKTIGHT (with inner/outer ring)
Features1:
Version of Spiral wound gasket using Graphite tape applied as filler material with inner ring and outer ring
Features2:
The outer ring of the gasket with an outer and inner rings is useful as a guide for adjusting the amount of reinforcement and tightening of the gasket, making gasket centering easy. In addition, use of an inner ring prevents the inner diameter of this gasket from deformation even if the gasket is tightened too much. For this reason, gaskets with inner and outer rings are the most reliable high-temperature/high-pressure gaskets that can be mounted on raised face flanges.
Features3:
Excellent airtightness greatly improves sealing performance against gas in general and vacuum.
Features4:
Excellent response to heat and pressure cycles reduces the frequency of retightening.
Features5:
They also have excellent radiation resistance (products complying nuclear power specifications are available).
Applicable fluids:
Water, Sea water, Hot water, Steam, Crude oil, Alcohol, Animal & vegetable oil, Heat transfer oil, General solvent, Weak acid, Weak alkali, Strong oxidizing acid, strong alkali, Air, Nitrogen gas, Inert gas, Exhaust gas, Inflammable gas, Poisonous, Extremely low temperature liquids,
Inappropriate fluid:
Oxidizing acids such as hot, concentrated sulfuric acid, concentrated nitric acid and oxygen.
Application:
In particular best suited as gaskets for use handling high temperature & high pressure steam (except HTS), as well as very low temperature fluids such as LNG, liquid nitrogen and liquid hydrogen.
Standard Flange
For JIS pipe flanges＝10K、16K、20K、30K、40K、63K For JPI and ANSI pipe flanges＝Classes 150, 300, 400, 600, 900, 1500, 2500 Gaskets complying with other standards such as ASME and MSS are also available.
Non-Standard Flange
| Gasket thickness（mm） | Manufacturing ranges |
| 3.2(T) | 10〜1500 |
| 4.5(V) | 10〜3000 |
| 6.4(W) | 300〜3400 |
Products with a gasket thickness of 6.4 mm can be fabricated with the outer diameter of the outer ring of up to 3,500.
The sign “( )” shows thickness classifications.
