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Teflon Envelope Gasket / Teflon Envelop Gasket are type of static seal. It is composed of elastic materials such as compressed non-asbestos sheet and a PPTFE has superior properties against chemical (not affected by all chemicals except molten alkali metal and fluorine at elevated temperature) and a wide working temperature range. (from -180~260) the coefficient of static and dynamic friction of PTFE are very low. PTFE is the best of the non-stick materials. It has excellent weathering and aging characteristics.
Application areas:
PTFE envelope gasket is used to seal pipe flanges glass lined, PVC or FRP. Low bolt torque effecting a seal and chemical compatibility is a main characteristic of this type of gasket.
Material ang type of PTFE envelope gaskets
| FILLER MATERIAL | Non-asbestos compressed sheet;asbestos compressed sheet |
| V-TYPE | |
| U-TYPE | |
L-TYPE |
Application Data :
| inspection item | Unit | Data |
| Bulk density | G/CM3 | 1.90(±0.10)-for sheetl; 2.30(±0.20) for PTFE seal |
| colour | ------ | Green,Blue,White |
| Pressure Limit | Bar | 40 |
| Temperature Limit | 260 | |
| PH Range | ------ | 0-14 |
| PTFE Seal thckness | MM | 0.5(±0.10)/side |
Gasket Thickness | MM | 2(±0.10) or as customers request |