BLACKHYPER™ Valqua® No. GF300. This gasket is mainly composed of PTFE as a binder and doesn’t contain any rubber. Features: Very minor change in physical properties even under high temperatures, Excellent chemical resistance. Excellent heat resistance, Easy to handle , Does not harden easily, No hardening makes retightening possible. Temperature: -200 to 300oC/-328 to 572oF, Pressure: Max 3.5 MPa, Suitable fluids: General fluids (water, steam, oil, etc.), solvents, liquefied gas, Applications: Pipe flanges, valve bonnets, towers & tanks, pressure vessels and heat exchangers, Color type: Black, Print color: Black. The ring molded article supports JPI (ASME / ANSI)