SEEFAR PTFE envelope gaskets provide positive, trouble-free sealing in most applications ranging from mild to severely corrosive environments. PTFE envelope gaskets are available in a broad range of s
Seefar Rubber Plastics Co.,LTD manufactures a wide range of PTFE envelope gasket styles and sizes.
Rubber or Plastics free PTFE jacketed 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.
SEEFAR PTFE envelope gaskets provide positive, trouble-free sealing in most applications ranging from mild to severely corrosive environments. PTFE envelope gaskets are available in a broad range of standard sizes and configurations, as well as custom sizes upon request. Ideal applications for PTFE envelope gaskets include uses in equipment employing alloy, standard steel and glass-lined flanges; plastic, ceramic, and other types of flanges, and conical end glass pipe.
envelope gaskets are soft, easily compressible, chemically inert PTFE. The combination of chemical resistance and very low permeability make the Chem-seal envelope gasket a superior gasket for severe corrosive service in glass lined equipment where conventional envelope gaskets will not meet the requirements. Chem-seal envelope gaskets are designed to seal from cryogenic temperatures to 500 degrees Fahrenheit and conform to all FDA specifications. Other high performance features of Chemiseal GZ envelope gaskets include a stress free envelope, low torque sealing, and are fiber and filler free. Chem-seal envelope gaskets are 100% PTFE and are FDA approved.