PTFE Envelope Gasket
These are unique PTFE gaskets featuring two composite materials. In PTFE envelop gaskets, the polytetrafluoroethylene functions as envelope. The PTFE covers an inlay material.
However, they are high performance Teflon gaskets for high pressure and high temperature applications.
The inlay material may include rubber, corrugated metals, graphite or any other high strength material is used. However, the envelope material is any PTFE grade material.
PTFE Envelop Gasket Type
Although there no standards PTFE envelop gasket dimensions and shape, their design depend on specific applications requirements.
Take for example, if you are looking for Teflon envelop gaskets with:
- High pressure applications – you can choose the U-shape, double U-shape, donut-shape or C-shape PTFE envelope gaskets
- Low pressure application – the Y-shape or V-shape PTFE envelope gaskets offers perfect options
Benefits of PTFE Envelop Gasket
Recently, PTFE envelop gaskets are popular due to:
- Chemical inert properties due to carbon and fluorine bonds in the PTFE
- High pressure resistance as a result of the inlay material
- Ability to absorb vibrations and guarantee noise free operations
- Best anti-corrosion properties
- Wide working temperature -200°C to 250°C
Where to Use PTFE Envelope Gasket
Generally, choose Teflon gaskets where application requires high pressure and chemical resistance. Common industries using the PTFE gasket technology include chemical, pharmaceutical, oil and gas industries.
A practical applications are:
- Flange gasket
- Sealant in piping systems
- Valve systems
- Glass-lined and ceramic flanges
