O-ring with PTFE Encapsulated

 

Product Description：

O-Rings with PTFE Encapsulation combine the chemical resistance of PTFE with the elasticity and sealing reliability of an elastomer core. This hybrid design provides superior performance in demanding applications where standard O-rings may fail.

Chemical Resistance: PTFE outer layer is inert to almost all chemicals, including strong acids, bases, solvents, hydrocarbons, and oxidizers.

Temperature Range: Maintains sealing performance over a wide range, typically -60°C to +260°C, depending on jacket and core material.

Low Friction: Smooth PTFE surface reduces wear and allows easy installation in tight grooves.

Elastic Core: Silicone, Viton® (FKM), or EPDM core provides compression, recovery, and reliable sealing force.

Flexible Options: Available in solid-core or hollow-core designs to meet both high sealing force and low compression requirements.

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

Why choose us?

• Our PTFE Encapsulated Viton products are environmentally friendly and safe.
• Relying on our persistence, pursuit and courage to challenge ourselves forever, we will continue to bring forth the new and create better O-ring with PTFE Encapsulated to thank new and old customers for their support.
• We have a strong commitment to employee wellbeing and safety.
• We have created a large number of excellent performance, our products are well received by the majority of users, thus laying a firm position in the industry.
• Our manufacturing process is efficient and streamlined, reducing lead times and costs.
• Quality and accountability are two important things that we think the company needs to grasp if it wants to grow. Good quality leads to profit. Dare to take responsibility, can have customers.
• We have a team of experienced professionals dedicated to meeting your needs.
• We are based on the principle of fairness and integrity to provide customers with better, better, and more efficient services.
• Our company is committed to ethical business practices and social responsibility.
• The company pays attention to enterprise innovation and development in re-innovation. The innovation results have achieved good economic and social benefits.

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