BLACKTIGHT™ VALQUA® No. 6590 Series.
These gaskets are composed of pure graphite (expanded graphite) as filler material.
Features: Reducing retightening frequency, Excellent air tightness, Excellent sealing properties at very low temperatures.
Temperature: 270 to 450oC / 454 to 842oF, Pressure: Max 30.0 MPa.
Suitable fluids: General fluids (water, oil, etc.), high temperature & high pressure steam, liquefied gas, cryogenic fluid