Oring With PTFE Encapsulated

 

Product Description：

PTFE Encapsulated O-Rings combine the unparalleled chemical resistance of PTFE with the elasticity and recovery of an elastomeric core. This hybrid structure provides a sealing solution that outperforms traditional O-rings in aggressive chemicals, high-temperature systems, and demanding industrial applications.

These O-rings deliver the benefits of both worlds:

 

 

• PTFE jacket for chemical inertness, low friction, and extended durability

 

• Elastomer core for resilience, compression, and sealing force

This makes PTFE Encapsulated O-Rings a preferred choice for industries that cannot compromise on sealing reliability.

PTFE-encapsulated designs offer several performance advantages:

1. Outstanding Chemical Resistance

PTFE (Polytetrafluoroethylene) is compatible with nearly all industrial chemicals, including:
• Strong acids & alkalis
• Solvents, hydrocarbons, aromatic fluids
• Oxidizers & corrosive media
Its non-reactive nature ensures long-term stability in chemically harsh environments.

2. Excellent Thermal Stability

PTFE Encapsulated O-Rings perform reliably across wide temperature ranges, typically:
-60°C to +250°C (varies by core material)
This makes them ideal for high-temperature production lines, CIP/SIP processes, and thermal cycling applications.

3. Low Friction & Wear Resistance

The PTFE jacket provides:
• Low coefficient of friction
• Reduced wear and sticking
• Improved installation performance

4. Flexible, Elastic Sealing Force

The elastomer core delivers the compression and recovery needed for leak-free sealing that PTFE alone cannot achieve.

PTFE Encapsulated O-Rings are available with two main elastomer cores:

▲ FKM (Viton®) Core

• Excellent compression set resistance
• Higher temperature stability
• Suitable for aggressive chemical environments
Temperature Range: -20°C to +204°C

▲ Silicone Core

• Superior flexibility & low-temperature elasticity
• Ideal for applications requiring low squeeze force
Temperature Range: -60°C to +200°C

PTFE Jacket Types

Two PTFE-based jacket materials are commonly used:

FEP is suited for most standard chemical applications,
while PFA is preferred in environments requiring extreme durability and high temperatures.

 

Solid-Core vs. Hollow-Core

PTFE Encapsulated O-Rings can be supplied with:

● Solid-Core (Standard)

• Best recovery
• Maximum sealing force
• Superior resistance to compression set

Recommended for static sealing in critical environments.

● Hollow-Core (Optional)

• Reduced installation force
• More flexible sealing
• Suitable for delicate equipment or thin-walled hardware

The correct PTFE Encapsulated O-Ring depends on:
• Chemical exposure
• Temperature range
• Pressure & sealing force
• Dynamic vs static application
• Hardware geometry

PTFE Encapsulated O-Rings are widely used in:
• Chemical processing equipment
• Food & pharmaceutical manufacturing
• Semiconductor & electronic industries
• Petrochemical & refinery systems
• Pumps, valves, reactors, mixers, and instrumentation

Because PTFE jackets have limited stretch, proper installation is essential.

1. Pre-Heating (Recommended)

Heat the O-rings to improve flexibility:
Hot Water Method
• Place in 100°C water for 3 minutes
• Install immediately while warm

Oven Method
• Heat at 100°C for 10–15 minutes
• Install while still warm

2. Avoid Damage

• Ensure hardware edges are smooth
• Do not overstretch the O-ring
• Use lubrication if compatible with the process

•Precise inspection, zero-defect quality, ensuring both delivery time and quality.

•Meets the 125/1008H high-temperature aging test requirements of the new energy industry;

•Withstands commercial cleaner (Alcohols, Alkalis, Oils) test requirements.

Contact US：

Xiamen Best Seal Imp and Exp Co.,Ltd

Tel: +86-592-5782315

Mob: +8618950159396

Email: yunying2@bestsealhk.com

Add: Unit 522-525, Gaodian Road 6#, Huli District, Xiamen, China

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