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Polypac Buna-N O-Ring Kit — Reliable NBR Seals for Hydraulic Use

Polypac Buna-N O-Ring Kit delivers durable, oil-resistant NBR O-rings ideal for hydraulic, pneumatic and general sealing needs. Manufactured with advanced equipment, available in multiple sizes and custom options.

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Product Details

Polypac Buna-N O-Ring Kit — Practical, Durable Sealing

The Polypac Buna-N O-Ring Kit offers a reliable, cost-effective solution for hydraulic, pneumatic and general-purpose sealing. Made from high-quality Buna-N (NBR), these O-rings provide excellent resistance to oils, fuels and many hydraulic fluids, making them a top choice for maintenance teams and OEMs.

Key Benefits

Oil and fuel resistance: Buna-N (NBR) is optimized for contact with hydraulic oils and petroleum-based fluids.
Durability: Good abrasion and compression set performance for longer service life.
Wide size range: Kits include common sizes to match standard grooves and fittings.
Easy to use: Fits standard installations for quick repairs and reduced downtime.

What's in the Kit

The kit contains a selection of NBR O-rings across popular cross-sections and diameters, carefully packed for organization. Options include varied quantities per size and the ability to customize the combination to match your maintenance needs.

Why Choose Polypac

Polypac is a scientific and technical hydraulic seal manufacturer and oil seal supplier with over a decade of industry experience. Founded in 2008, our factory covers more than 10,000 m² and uses advanced production and testing equipment. We started with filled PTFE products and now produce a wide range of O-rings including NBR, FKM, silicone, EPDM and FFKM. Long-term partnerships with universities and research institutes ensure consistent quality and ongoing material development.

Custom Solutions & Support

If the standard Buna-N O-Ring Kit doesn’t match your requirements, Polypac provides custom rubber O-rings and tailored sealing solutions for special working conditions. Our team can advise on compatibility, installation tips and optimal sizing to extend seal life and protect equipment.

Choose the Polypac Buna-N O-Ring Kit for dependable NBR seals that balance performance and cost. Contact us to order standard kits or request a custom assortment.

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FAQ

When should I use a spring-energized seal instead of a standard elastomeric seal?

Consider a spring-energized seal (e.g., GSF, SPN types) for demanding applications involving: Extreme Temperatures (below -30°C or above +200°C) Aggressive Chemicals that elastomers can't handle Very Low Leakage or "Zero Leakage" requirements Poor Lubricity or dry running conditions The internal spring maintains constant sealing force, compensating for wear and system variables.

How can I prevent seal damage during installation?

Use Tools: Always use dedicated installation tools (e.g., picks, cones, guides). Lubricate: Always lubricate the seal and the contact surface. Protect Sharp Edges: Cover sharp threads and edges with tape or use an installation sleeve. Check the Groove: Ensure the installation groove is clean, deburred, and undamaged.

What does "AS568" mean?

AS568 is the Aerospace Standard that defines the dimensions for over 360 standard O-ring sizes. It is the most widely accepted sizing system in North America and globally. An AS568 number (e.g., AS568-214) specifies a precise inside diameter and cross-section.

How important is surface finish on the metal parts that contact the seal?

Extremely important. A rough surface will abrade and wear out the seal quickly, causing leaks. A finish that is too smooth can prevent a lubricating film from forming. A typical recommended surface finish for dynamic applications is 0.2 to 0.8 μm (8-32 μin) Ra.

If you have any questions about our goods or services, please feel free to contact us.

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PRODUCTS

dbde24e1-4012-47b6-8db4-e89ee4ca5a70

Polypac Industrial Technology Co.,Ltd

+86 189 2463 6168

rose@dmsseals.com

No. 5, Hegui Mid Road, Hegui Industrial Park, Lishui Town, Nanhai District, Foshan City, Guangdong Province, P.R. China.

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