Hollow Rubber O-rings

Hollow Rubber O-Rings are specially designed for applications requiring low closure force and reliable static sealing. By replacing the solid cross-section of a traditional O-ring with a hollow core, these rings compress easily without reducing material hardness, making them ideal for sensitive assemblies or enclosures with limited compressive force.

These O-rings provide excellent compression set resistance, maintain sealing performance over time, and can accommodate large tolerance variations in the mating surfaces. Their hollow design also allows for easy assembly and installation, reducing the risk of part deformation or damage.

Hollow Rubber O-Rings are widely used in industries such as electronics, automotive, medical devices, instrumentation, and fluid control systems, particularly for sealing lids, covers, static enclosures, and low-pressure housings. With customizable sizes, hardness, and material options, they offer a versatile and economical solution for a wide range of static sealing applications.

Our Hollow O-Rings are produced using a hot vulcanizing bonding process, which ensures the splice joint is as smooth and compressible as the rest of the O-ring. The splicing compound uses the same base polymer as the extrusion, providing uniform mechanical and chemical properties along the entire seal. This method allows fabrication of a wide variety of hollow cross-sections, including circular, square, rectangular, or custom extruded shapes.

Available materials include NBR, EPDM, FKM, Silicone (VMQ), HNBR, FFKM, and other approved compounds. Hardness can be customized between 20–75 Shore A, providing flexibility for different sealing and compression requirements. All materials comply with UL, ASTM D2000, NSF STD-51, USP Class VI, and FDA 21 CFR177.2600 standards.

Hollow Spliced O-Rings are ideal for :

 

Applications where low closing force is required.

Rough or uneven surface sealing.

• Automotive components and enclosures.
• Electronic equipment transit cases.
• Handheld electronics and communication devices.
• Low-pressure static sealing in enclosures.
• Outdoor electronics and communication enclosures.
• Power generation and semiconductor applications.

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.

• Can be used in standard or non-standard grooves.
• Closure force can be adjusted by modifying material hardness, cross-section wall thickness, or geometry.
• Hollow cross-sections are ideal replacements for foam or sponge gaskets, providing low closure force sealing with superior durability.
• Cost-effective solution for static face, axial, or radial seals.
• Low tooling cost and flexible extrusion options.
• Compatible with a variety of solid and hollow cross-sections.
• Advanced hot vulcanization ensures smooth splices and tight tolerances.
• Superior compression set resistance for long-term sealing performance.

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

Why choose us?

• Our Hollow O-rings are designed and manufactured to reduce maintenance costs and improve efficiency.
• The company adheres to the cultural philosophy of "integrity, excellence, unity and win-win" and is committed to becoming the most influential company in the world!
• Our Hollow O-rings come in a wide range of sizes and colors to match your requirements.
• We have established a good corporate image while maintaining a sound business operation.
• Our Hollow O-rings have been engineered to provide superior performance and reliability.
• We maintain long-term and stable relationships with our major customers, and at the same time gain more new customers.
• We offer a wide range of Hollow O-rings in various sizes and materials to meet your specific needs.
• We actively develop strategic emerging industries, actively research and develop high-end Hollow Rubber O-rings, and continuously promote the optimization and upgrading of product structure.
• Our Hollow O-rings are made to the highest standards and meet all industry requirements.
• Core values are the ultimate beliefs of a company, indicating its survival stance and determining its development direction. Our company always upholds to achieve the people's satisfaction, employee satisfaction, government satisfaction, shareholder satisfaction of an enterprise.

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