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Product name
BLACKTIGHT (with inner ring)
Features1
Version of Spiral wound gasket using Graphite tape applied as filler material with inner ring
Features2
A gasket with an inner ring is used for a male-female flange. The inner ring not only reinforces the gasket but also decreases the clearance between the pipe’s inner diameter and the gasket, as well as preventing accumulation of fluids and errosion of corner areas. Please use a product with an inner ring 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
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. ▼ For non-st
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.
