PTFE Coated Hollow O-Rings

Hollow O-Ring are designed as a practical and cost-effective alternative to standard solid O-rings in applications that require low closure force and reliable static sealing. By replacing the solid cross-section with a hollow elastomer core, these O-rings compress more easily while maintaining material hardness, ensuring a tight seal even in assemblies with large tolerance variations or limited compressive force.

These hollow replacements provide excellent compression set resistance, long-term durability, and consistent performance over time. Their lightweight, hollow design reduces assembly force and minimizes stress on delicate components, making them ideal for enclosures, lids, doors, and other static sealing applications.

PTFE Coated Hollow O-Rings are widely used in applications that require low closure force and stable long-term sealing performance. With a hollow elastomer core, they compress easily under minimal load, making them ideal replacements for foam or sponge gaskets, while providing far better compression set resistance and overall durability.

Their structure supports interference-fit installation, allowing the O-rings to sit securely in grooves without adhesives or mechanical retainers, simplifying assembly and reducing the chance of seal displacement. The PTFE coating enhances chemical resistance and reduces friction, helping the seal maintain performance in demanding environments.

A key advantage of this design is its high level of customization. By adjusting the wall thickness, hollow cavity size, and rubber durometer, the sealing force and compression characteristics can be precisely tailored to specific applications. Combined with optional PTFE colors and a wide operating temperature range, PTFE Coated Hollow O-Rings offer a reliable and flexible solution for industries requiring lightweight, durable, and easily assembled seals

Suitable for

• Low pressure static applications.
• Applications where low closing force is required.
• Applications with rough or uneven surface finishes.
• Environments requiring chemical or abrasion resistance provided by PTFE coating.

Not suitable for

• High pressure applications.
• Dynamic or high-speed motion applications.
• Situations where extreme elasticity is required under repeated cycling.

Low closure force: Suitable for sensitive or delicate assemblies.

Easy assembly: Hollow core simplifies installation in standard or non-standard grooves.

Durable and reliable: Maintains sealing performance over long-term static applications.

Cost-effective: A practical alternative to foam, sponge, or solid O-rings.

Customizable: Sizes, hardness, and elastomer materials can be tailored for specific applications.

Large size availability: Can be produced in inner diameters up to 1000 mm or larger.

Compression set resistance: Retains shape and sealing performance even after repeated compression.

Tolerance compensation: Hollow design allows absorption of larger enclosure tolerances without increasing force.

PTFE Coated Hollow O-Rings are ideal for static sealing applications that require low closure force combined with chemical, abrasion, and temperature resistance. Common applications include:

These O-rings are not recommended for high-pressure dynamic applications or environments where the seal is subject to continuous movement, impact, or extreme mechanical stress.

How do PTFE Coated Hollow O-Rings work?:

These O-rings function similarly to traditional O-rings: the elastic ring is placed between two mating parts and compressed to fill the gap. Under pressure, the ring deforms slightly within its groove to create a tight seal. The hollow core allows the ring to compress with lower force, while the PTFE coating provides a smooth surface, chemical resistance, and minimal friction. This combination ensures reliable sealing even in static applications with tight tolerances or chemically aggressive environments.

20Years of experience
in one-stop service

Xiamen Best Seal Imp. & Exp. Co., Ltd

 

With over 20 years of manufacturing experience, we are a professional rubber sealing products manufacturer based in Xiamen, China.Exported to 68 countries and trusted by 450+ long-term customers worldwide, we have established a solid international reputation.

 

Our factory covers 3,600 square meters, equipped with 36 production lines and 100+ skilled employees.We produce up to 5 million pieces per day, ensuring stable and efficient delivery.

 

3600m²

Factory floor area

5 million+

Pcs per day

36

Production Lines

100+

Professional Team

•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

Hot Tags: ptfe coated hollow o-rings, China ptfe coated hollow o-rings suppliers, manufacturers, factory