PTFE gaskets are precision sealing components made from Polytetrafluoroethylene (PTFE), commonly used in corrosion-resistant pipelines and flange connections. They offer exceptional resistance to chemicals, high temperatures, and electrical insulation.
The manufacturing process ensures consistent quality and performance through the following key steps:
1. Raw Material Pretreatment
PTFE fine powder is carefully dried and dehumidified to eliminate moisture and prevent porosity or voids during molding.
This step is critical to achieving a smooth and defect-free gasket structure.
2. Compression Molding
The prepared PTFE powder is cold-pressed in a mold to form a preform (blank).
Controlled pressure ensures uniform density and precise shape before sintering.
3. Sintering
The molded preform is gradually heated above 380°C in a specialized furnace.
During this sintering stage, PTFE molecules rearrange and bond, forming a dense, cohesive structure with improved mechanical strength.
4. Cooling & Annealing
The sintered component is slowly cooled following a controlled temperature curve.
This process helps relieve internal stresses, preventing deformation and enhancing dimensional stability.
5. Precision Machining
After sintering, the blanks are machined using lathes or CNC equipment into various gasket types, including:
- Flat gaskets
- Corrugated gaskets
- Jacketed gaskets
Each type is tailored for specific sealing applications in chemical, petrochemical, and mechanical industries.
6. Inspection & Packaging
Finished gaskets undergo dimensional verification, density testing, and visual inspection to ensure they meet strict quality standards.
Approved products are then sealed and securely packaged for shipment.
Product Advantages
- Excellent Chemical Resistance: Suitable for acids, alkalis, solvents, and corrosive gases.
- High Temperature Durability: Continuous use up to 260°C, with short-term peaks above 300°C.
- Outstanding Insulation: Exceptional dielectric properties ideal for electrical and electronic applications.
- Non-Stick Surface: Reduces buildup and ensures long-term sealing performance.
Conclusion
Through precise molding, sintering, and machining, PTFE gaskets combine chemical inertness, high heat tolerance, and mechanical strength, making them a trusted choice for high-demand sealing solutions across industries such as petrochemical, pharmaceutical, and power generation.