CLEANTIGHT™ - VALQUA® No. 8590 Series. These gaskets are composed of non-asbestos-based inorganic paper tape as a filler material. Features: Excellent heat resistance. Temperature: -200 to 500oC/ -328 to 932oF, Pressure: Max 30.0 MPa. Suitable fluids: General fluids (water, steam, oil etc.), high-temperature & high-pressure fluids, liquefied gas