Products
Fluoro-polymers
FEP / PFA Encapsulated FKM O-Ring
Product Overview
KAFLON FEP / PFA Encapsulated FKM O-rings combine the exceptional chemical resistance of fluoropolymers with the elastic sealing performance of FKM elastomers.
This hybrid sealing solution is designed for applications where aggressive media, high purity, and reliable elastic recovery are required.
The seamless FEP or PFA outer jacket provides near-universal chemical compatibility, while the FKM core ensures excellent resilience, compression recovery, and sealing force.
These O-rings are an ideal alternative to PTFE O-rings in applications requiring improved elasticity and easier installation.
Key Features & Benefits
Outstanding Chemical Resistance
FEP / PFA encapsulation provides excellent resistance to acids, alkalis, solvents, and corrosive chemicals.
Elastic FKM Core
The FKM elastomer core delivers superior elasticity, ensuring reliable sealing and better compression recovery than solid PTFE O-rings.
Low Permeation & Smooth Surface
The fluoropolymer jacket offers low permeability and a smooth, non-stick surface for clean and stable sealing.
Wide Temperature Capability
Suitable for applications across a broad temperature range, maintaining sealing integrity under thermal cycling.
Improved Installation & Handling
More flexible and forgiving than solid PTFE O-rings, reducing installation damage and improving assembly efficiency.
Excellent Media Purity
Non-contaminating outer jacket makes these O-rings suitable for clean and sensitive environments.
Encapsulation Options
FEP Encapsulated FKM O-Rings
- Cost-effective solution
- Excellent chemical resistance
- Suitable for most industrial applications
PFA Encapsulated FKM O-Rings
- Enhanced thermal and mechanical performance
- Improved resistance to stress cracking
- Ideal for higher temperature and more demanding applications
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Typical Applications
KAFLON FEP / PFA Encapsulated FKM O-rings are widely used in:
Chemical processing equipment
Pumps, valves, and mixers
Pharmaceutical and biotech systems
Food & beverage processing equipment
Semiconductor and electronics manufacturing
Water treatment and filtration systems
Oil & gas auxiliary sealing applications
Performance Summary
| Property | Performance |
|---|---|
| Chemical Resistance | Excellent (acids, alkalis, solvents) |
| Temperature Resistance | Wide operating range (depends on jacket type) |
| Elastic Recovery | Excellent |
| Permeation Resistance | Very low |
| Surface Friction | Low |
| Sealing Type | Static & limited dynamic |
Why Choose KAFLON FEP / PFA Encapsulated FKM O-Rings?
Hybrid Sealing Advantage
Combines PTFE-like chemical resistance with elastomer-like sealing performance.
Reliable Sealing in Aggressive Media
Ideal for environments where standard FKM O-rings would be attacked by chemicals.
Longer Service Life
Reduced compression set and improved recovery help extend sealing life.
Cost-Effective Performance
A practical alternative to solid PTFE or high-cost elastomers in demanding applications.
Custom Solutions Available
KAFLON offers custom sizes, jacket materials, and compound options based on application needs.
Frequently Asked Questions
What is the advantage of an encapsulated O-ring over standard FKM O-rings?
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Encapsulated O-rings provide much higher chemical resistance while retaining elastomeric sealing force, making them suitable for aggressive media where FKM alone would degrade.
How do encapsulated O-rings compare to PTFE O-rings?
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Encapsulated O-rings offer better elasticity and easier installation than solid PTFE O-rings, while maintaining similar chemical resistance.
When should PFA encapsulation be selected instead of FEP?
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PFA encapsulation is recommended for higher temperature, more demanding chemical environments, or applications requiring enhanced mechanical durability.
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