Expanded Ptfe Gasket Sheets and Cut Gaskets Style 2800

 Applications:

Key Benefits:

Expanded PTFE (ePTFE) is a high-performance sealing material derived from polytetrafluoroethylene (PTFE), engineered into a microporous structure through a special stretching process. It is widely used in sealing applications where chemical resistance, temperature tolerance, and long service life are critical.

Applications of Expanded PTFE

1. Flange Gaskets (Cut Gaskets):

•  Used in pipe flanges in chemical processing, food and beverage, and pharmaceutical industries.

2.Lined and Glass-lined Equipment:

• Ideal for sealing fragile surfaces like glass or ceramic-lined flanges due to its softness and conformability.

3. Manways, Heat Exchangers, Pumps, Valves:

•  Suitable for sealing irregular, warped, or damaged flange faces.

4.Aggressive Chemical Services:

•  Excellent chemical resistance makes it suitable for use in corrosive environments (acid, alkali, solvents).

5.Oxygen and Chlorine Services:

•  Clean and inert properties make it suitable for highly reactive or hazardous media.

6.Food and Pharma Applications:

•  Non-toxic, FDA-compliant versions of ePTFE are used in sensitive process industries.

Relevant Standards for Expanded PTFE Gaskets :

1. Material & Performance Standards:

• ASTM F104: Standard classification for non-metallic gasket materials
• ASTM F36: Compressibility and recovery.
• ASTM F38: Creep relaxation.
• ASTM F37: Fluid leakage.
• ASTM D4894 / D4895: PTFE material specifications.

2.Application Standards:

• ASME B16.21: For non-metallic flat gaskets.
• EN 13555: Gasket characterization parameters for flange design.
• TA-Luft / VDI 2440: Emissions compliance, particularly in Europe.
• FDA 21 CFR 177.1550: For food-grade ePTFE.
• USP Class VI: For pharmaceutical applications.

3. Fire Safety:

• API 607 / ISO 10497: (If applicable in fire-safe systems, although ePTFE itself is not fire-rated unless combined in composites.)