High-integrity PTFE envelope gaskets – supplied by National Fluoromers
technical specifications
| Property | Value |
|---|---|
| Jacket material | Virgin PTFE |
| Envelope thickness | 0.5 mm to 1.5 mm |
| Gasket thickness | 1 mm to 5 mm (custom available) |
| Diameter range | Up to 600 mm |
| Temperature range | –200°C to +260°C (based on filler type) |
Used extensively in the chemical, food, pharmaceutical, and water treatment industries, our PTFE envelope gaskets provide a secure seal while protecting the core gasket material from media attack.
key features
- Excellent chemical compatibility: PTFE envelope resists almost all acids, alkalis, and solvents.
- Wide operating temperature range: Up to +260°C
- Non-stick surface: Prevents gasket adhesion to flange faces.
- Customizable shape: Available in round, oval, square, or irregular flange patterns.
- FDA grade available: Suitable for food, pharmaceutical, and clean applications.
advantages
- Combines the sealing performance of elastomers with the inertness of PTFE
- Reduces gasket blowout in high-pressure systems
- Prevents chemical degradation of core gasket materials
- Provides reliable sealing for fragile or non-metallic flanges (glass, plastic, etc.)
- Cost-effective solution for high-maintenance pipelines
applications of PTFE envelope gasket
- Flange sealing in chemical processing pipelines
- Pharmaceutical and food-grade process equipment
- Corrosive or high-purity systems
- Lined pipe joints (glass, FRP, PTFE)
- Reactor manways and sight glass assemblies
- Semiconductor and water treatment systems
industries we serve
- Chemicals & petrochemicals
- Food & beverage processing
- Pharmaceuticals & biotechnology
- Power generation & water treatment
- Semiconductor & electronics
- Oil & gas
- Marine & offshore systems
why choose National Fluoromers
- In-house PTFE envelope forming and CNC cutting
- Custom gasket shapes, bolt patterns, and filler materials
- Short lead times with bulk and project-based supply
supply options
- U-cut and slit-cut envelope gaskets
- Custom-cut for ASME, DIN, or non-standard flanges
- Supplied in single units or batch-packed kits
- Export-ready packaging for global delivery
Need PTFE envelope gaskets that can handle your harshest sealing conditions? Reach out to National Fluoromers – your trusted source for PTFEcomposite sealing products.
Share your flange details or drawing – we will manufacture the perfect envelope seal.
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