Characteristics and properties
They consist of a casing, in P.T.F.E. 100% virgin, usually of thickness 0.5 mm. Open externally or internally, inside which are allogiate asbestos-free gasket material or reinforced graphite, or PTFE: bidirectional, giving, excellent resistance to acids, protecting the insert, leaving no residue on the body flange, has excellent dielectric characteristics and a low porosity. They can also be coupled always inside the casing, a corrugated ring of metal material to increase the sealing capacity in the most difficult conditions. The latter may in turn be provided with a special fin the grounding to discharge any static electricity.