Product name
BLACKTIGHT (with outer ring)
Features1
Version of Spiral wound gasket using Graphite tape applied as filler material with outer ring
Features2
The circumferance of the outer ring of a gasket with an outer ring inscribes the bolt of the flange, making gasket centering easy. This ring is also useful as a guide for adjusting the amount of reinforcement and tightening of the gasket. For use with a raised face flange, (with inner and outer rings) is recommended, as deformation of the inner diameter of the gasket is possible. Please use a product with inner and outer rings if the pressure rating of the flange is Class 900 (JIS 63K) or greater, or if the nominal diameter of the flange is 650A (26B) or greater.
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
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Gasket thickness（mm）
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Manufacturing ranges
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3.2(T)
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10〜1500
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4.5(V)
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10〜3000
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6.4(W)
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300〜3400
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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.
"( )" shows thickness classifications.