Expanded PTFE Gasket
Expanded PTFE (Teflon) gasket material is manufactured by expanding virgin PTFE, a process that results in a uniform, highly fibrillated microstructure and isotropic tensile strength. Expanded PTFE offers greater softness and flexibility than virgin PTFE gaskets, enabling easy conformity to uneven and rough surfaces. The material is easier to compress while minimizing creep and cold flow
It is suitable for use in steel flanges as well as flanges where a highly compressible gasket is required. Expanded PTFE Gasket is also
suitable for sealing flanges with irregular surfaces. It will not exhibit the cold flow problems associated with virgin PTFE or the hardness
problems of some other filled PTFE products. It has excellent sealability, cuts easily, and separates cleanly from flanges after use
Advantages
Unlimited shelf life and no aging, combined with complete resistance to UV, ozone, and corona. It is also easy to hand or die cut and removes cleanly from flange surfaces after operation
Sizes from 1/2” – 24” available, Customized shapes available
High tensile strength and dimensional stability and high Resistance to creep and cold flow.
This design prevents gasket overhang into the pipe bore, helping maintain optimal process performance
Reliable sealability and good consistency resulting in a superior initial sealing capability
Technical Data
PROPERTY | STANDARD | VALUE |
Color | – | White |
Density | ASTM D792 | 0.75-0.95g/cm3 |
Operating temperatures | – | -286 – 320°C |
Compressibility | ASTM F36 | 45 % |
Recovery | ASTM F36 | 12 -13% |
Creep Relaxation | ASTM F38 | 35 – 36 % |
Sealability (Nitrogen) | ASTM F 37B | 0.15 ml / hr |
Sealability (Fuel A) | ASTM F 37B | 0.02 ml / hr |
Service Pressure | – | Full Vaccum to 19 MPa |
Tensile Strength Both directions | ASTM D638 | 19.6 MPa |
Applications:
Application Used for • Hand-holes and manholes
- All types of sealing flange
- Heat exchangers
- Compressors
- Pump, etc
And suitable for various industries, including distilleries, food and beverage, general chemical, marine, iron and steel manufacturing, pharmaceutical, petrochemical, pulp and paper, and power generation.