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PTFE Gaskets are cut from virgin PTFE sheets, or molded rods, tubes, etc.PTFE has the best chemical resistance among known plastics. It also has good aging stability, electrical insulation, wear resistance, and an extremely low friction coefficient. The unloaded operating temperature range is -180~+260°C.
PTFE gasket is one of the most suitable types of gaskets for a variety of sealing applications. Different types of PTFE gaskets are available to meet various application demands.
|Sr. No.||Compounds||Virgin PTFE||Glass Filled PTFE (25%)||Carbon Filled PTFE (25%)||Bronze Filled PTFE (40%)||Graphite Filled PTFE (15%)|
|3||Elongation At Break||%||250-400||200-300||80-150||200-350||150-250|
|7||Coefficient of Friction|
|a. Dynamic P- 7kg/cm2 V-0.5||0.04-0.06||0.5-0.54||0.12-0.17||0.11-0.15||0.11-0.16|
|b. Static P-35 kg/cm2||0.05-0.08||0.11-0.13||0.06-0.11||0.08-0.10||0.08-0.10|
|8||Water absorption (max.)||%||0||0.013||0||0||0|
|9||Continuous Service Temperature||°C||+260||+260||+260||+260||+260|
|11||Chemical Resistance||PTFE is chemically inert & unaffected by all known chemicals except molten or dissolved alkali metals- Sodium, Potassium, Rubidium, Cesium, Francium & Fluorine Gas, certain fluorine compounds and complexes at elevated temperatures. Filled PTFE has inferior chemical resistance depending upon the particular filler.|