Sumed manufactures a wide range of PTFE Envelope Gasket in various styles and sizes.

• Asbestos free PTFE jacketed 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. 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 Bush, machined in standard sizes as well as various take-outs to accommodate your filler.
• 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