... ,including pure PTFE gasket,PTFE enveloping gasket and expanded PTFE sealing tape 1.PTFE ring is custom made of PTFE sheet ,including ... pure PTFE gasket,ptfe enveloping gasket and expanded PTFE sealing tape.2.Application:Acid-resisting pipes for halogen,solvent,oil,gas ... ,food and medication,sealing gasket for various equipments.3.Temperature:-100--260. PTFE ...