Envelope gasket with insertsenvelope gasket with insertspolytetrafluoroethylene PTFE-lined envelope gaskets provide excellent sealing in PTFE envelope gaskets are offered designed for application in environments with corrosive conditions offered in conventional sizes and arrangements, Plus bespoke selections custom sizes is available for delivery upon request ptfe envelope gaskets can be found in slit v, Type or milled square cut with multiple options of materials available for fillers. 3g can manufacture the envelope gaskets essential for your unique situation. Uses of ptfe envelope gaskets general purpose glass lined equipment pharmaceutical high purity piping service food and chemical industries sizes 1/2 to 72 style gse is our normal service style envelope gasket that is the standard for glass lined tanks and tubing ptfe slit type and mill type envelope with non, Asbestos filler and a ss316 corrugated metal ring as filler. Ptfe envelope gaskets combine the minimal resistance and chemical stability of ptfe with the mechanical strength of the gasket material. This provides the user with a gasket that may be employed confidently with aggressive media which would attack many other materials. 3g can supply ptfe envelope gaskets to suit all flange types and sizes. Temperature up to, 250 c contingent upon the gasket material used . Applications glass lined distillation columns, Pipe systems and reactor vessels where non contamination is essential.