If you are looking for high-performance sealing material, the PTFE gaskets meet that criterion. A PTFE gasket material is a synthetic thermoplastic polymer with mainly carbon and fluorine. At times, the PTFE gaskets are also called Teflon gaskets.
Essentially, a PTFE gasket is a mechanical sealing mechanism, which you can use to fill space between two mating surfaces. These polytetrafluoroethylene gaskets are known for the best chemical resistance, “zero” friction, high thermal resistance, and exceptional performance in abrasive environments.
Types of PTFE Gaskets
Under normal circumstances, PTFE gasket price will depend on the type or classification criteria such as:
- Virgin gasket– suitable for the high-purity application. The gasket material is 100% pure polytetrafluoroethylene. These gaskets are mostly whitish. The virgin PTFE gaskets have superior electrical insulation and physical properties.
- PTFE-filled gaskets– adding certain fillers or additives improve certain performance properties. The fillers may include carbon, graphite, molybdenum disulfide, or certain metal by weight (5% to 40%). In most cases, they mainly improve mechanical, thermal, friction, and electrical properties. A good example is glass filled gasket.
- Expanded PTFE gaskets– these gaskets are made from virgin PTFE with fibrillated microstructure. The expanded PTFE gaskets are flexible and suitable for irregular surfaces.
- Mechanical grade PTFE gaskets– they contain recycled PTFE material.
Other classification criteria depend on the design such as the PTFE ring gasket, and PTFE flat gaskets.
PTFE Gasket Properties
- When it comes to PTFE gasket specifications, it is worth considering various properties that guarantee quality sealing such as:
- PTFE gasket temperature range from -260°C to +260°C.
- PTFE gasket torque – they can withstand high compression
- Chemical resistance – it is one of the best-known materials
- Suitable for cryogenic sealing systems
In addition to these, you should consider the PTFE gasket sizing chart. It will help you evaluate all the vital dimensions such as inner and outer diameter while matching them with appropriate applications.
Most PTFE gasket suppliers make these sealing accessories from PTFE gasket sheets. It may involve punching or cutting the PTFE sheet.
PTFE Gasket Applications
You can use these gaskets to seal sections in the chemical, aerospace, automotive, and manufacturing industries. Some common applications include:
- PTFE gasket for flanges
- PTFE pipe gaskets
- Packing application
- Reduce vibration or noise
Although PTFE gaskets tend to possess superior properties, they are inelastic. Additionally, they may be prone to high leakage.