WHITETIGHT™ - VALQUA® No. 7590 Series. These gaskets are composed of PTFE tape as a filler material. Features: Excellent corrosion resistance, Excellent air tightness. Temperature: -260 to 300oC / -436 to 572oF, Pressure: Max 20.0 MPa. Suitable fluids: General fluids (water, steam, oil, etc.), solvents, corrosive liquids, liquefied gas, gas (oxygen, etc.)