PTFE Flange Gaskets
A PTFE (Teflon) flange gasket is a flat gasket made of pure polytetrafluoroethylene that resists almost all chemicals. Its surface is non-stick and does not contaminate the medium, which is why it is preferred in chemical and food plants.
It is used on process lines carrying acids, alkalis and solvents, in food and pharmaceutical plants and at joints where purity matters. As pure PTFE can cold flow under load, flange torque and gasket thickness are chosen carefully.
Main Applications
- Acid and alkali lines
- Solvent and chemical process lines
- Food and beverage plants
- Pharmaceutical and cosmetics production
- Glass and plastic-lined equipment flanges
Technical Data
| Material | Pure PTFE (polytetrafluoroethylene) |
|---|---|
| Reinforcement | None |
| Type | Flat gasket |
| Thickness | By model |
| Dimension standard | EN 1514-1 |
| Compatible flanges | EN 1092-1 (DIN) and ASME B16.5 |
| Temperature and pressure | By grade, per manufacturer datasheet |
Material Options
| Part | PTFE flange gasket |
|---|---|
| Base material | Pure PTFE |
| Reinforcement | None |
| Ring | None |
| Typical medium | Acids, alkalis, chemicals |
Which material? Pure PTFE can slowly flow and relax under long-term load (cold flow); bolts should be rechecked after commissioning, and filled or spiral types considered at high temperature and pressure.
Advantages
Chemical Resistance
- Acids, alkalis and solvents
Clean
- Does not contaminate the medium
Non-Stick Surface
- Easy removal
Food Suitable
- Pure material
Construction and Design Features
- Flat gasket cut from pure PTFE sheet
- Bore matched to flange inside diameter
- Outer diameter inside the bolt circle
- Smooth surface
Send the chemical, operating temperature and DN size; we will confirm the PTFE gasket in the right thickness.
How to Choose?
- Identify the chemicalWrite the medium and its concentration.
- Check the temperatureConsider a filled type at high temperature.
- Choose the thicknessSet thickness by flange face condition.
- Recheck the boltsRetighten after commissioning.
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Why ORFA?
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