VALFLONв„ў (PTFE) Envelope Gasket using Compressed Non-Asbestos Fiber Sheet and Flexible Graphite in the core. Feature: Excellent chemical resistance. Suitable fluids: General fluids (water, steam, oil, etc.), solvents, corrosive liquids, liquefied gas. Applications: Pipe flanges, tanks, valve bonnets, and other equipment used in various industries. The ring molded article supports JPI (ASME / ANSI).