PTFE Envelope Gasket
PTFE envelope gasket is a kind of static seals. It is composed of elastic materials such as compressed asbestos sheet, rubber, ceramics, etc. and PTFE envelope cover.
PTFE has superior properties against chemical (not affected by all chemicals except molten alkali metal and fluorine at elevated temperature) and temperatre (from -180°C - +250°C) the coefficient of static and dynamic friction of PTFE are very low. PTFE is the best of the "non-stick" maerial. It has excellent Weathering and aging characteristics.
Style of PTFE Envelope
TFN 6000V: This is one of the most frequently used and economic types. It applies to use in every kind of occasion with lower temperature and lower pressure. Insert materials can be used by customers request.
TFN 6000S: It applies to with large dimension gaskets which are used in the chemicals with poison.
TFN 6000U: This type is used with the thick material embedded, it can reduce the innder flanges residue.
Max. Pressure: 50bar
Stress release: </=45%
Leakage rate: </=1x10-3 cm3/s
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