Envelope Gaskets

These PTFE envelope gaskets are available in the styles listed below:* Slit Envelope Gaskets - are essentially ring gaskets with 0.020" thick leaves slit from the OD to approximately 3/64" from the ID. These slit envelope gaskets are the most widely used gasket type in sizes for 1" to 12" OD.* Milled Envelope Gaskets - are made from PTFE cylinder stock, machined from their OD to within 3/64" of the ID. Milled envelope gaskets are available in standard sizes as well as various take-outs to accommodate your filler.* Formed Shield Envelope Gaskets - this design is used for large diameters and for irregular configurations, such as tank heads and manholes. A wide variety of elliptical and other irregular configurations are also available.* Double Jacket Envelope Gaskets - these envelope gaskets are recommended for vacuum service. The design of double jacket envelope gaskets completely covers the filler material with two overlapping PTFE jackets for optimum protection from corrosive attack.