PTFE Envelope Gasket | Corrosion-Resistant Sealing for Chemical & Food Processing Industries
Product Overview
Our PTFE Envelope Gasket (also known as PTFE Clad Gasket or Teflon Envelope Gasket) is a high-performance, non-metallic sealing solution designed for demanding applications in chemical processing, pharmaceuticals, and food-grade manufacturing. This gasket features a unique composite structure with a corrosion-resistant PTFE cladding layer encapsulating a resilient insert material, providing an effective barrier against aggressive media while ensuring material purity in sensitive processes.
Key Features & Benefits
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Excellent Chemical Resistance: PTFE cladding provides superior protection against a wide range of corrosive chemicals, acids, and solvents
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Material Purity & Cleanliness: Ideal for food-grade gasket applications and pharmaceutical sealing solutions where product contamination must be prevented
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Versatile Performance: Combines the chemical resistance of PTFE with the compression properties of various insert materials
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Easy Installation & Maintenance: Low friction coefficient facilitates straightforward installation and removal during maintenance
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Multiple Configuration Options: Available in V-type, U-type, and L-type envelope structures to match specific application requirements
Construction & Design Types
Type A – Cut Style Envelope Gasket
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Constructed from 0.8-1.0mm thick PTFE tube with precision cutting
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Features a 1.5-2mm opening from the inner diameter for insert placement
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Cost-effective solution for standard chemical sealing applications
Type B – Machined Style Envelope Gasket
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Precision-machined to match flange inner diameter exactly
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Minimizes fluid turbulence at flange connections
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Superior sealing performance with minimal gap formation
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Ideal for high-purity processing systems
Type C – Folded Style Envelope Gasket
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Manufactured using 0.4-0.8mm PTFE film heat-sealed in U-shape configuration
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Particularly suitable for large diameter flange sealing
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Economical manufacturing for custom-sized applications
Technical Specifications
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Temperature Range: -200°C to +260°C (depending on insert material)
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Pressure Rating: Suitable for most industrial process piping systems
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Insert Materials Available:
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Compressed asbestos fiber (CAF)
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Non-asbestos fiber (NAF)
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Graphite composite
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Food-grade compliant materials
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The description/sizes may be different with goods, please check with us when order.
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