dbde24e1-4012-47b6-8db4-e89ee4ca5a70 - Polypac

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dbde24e1-4012-47b6-8db4-e89ee4ca5a70

O-Ring Assortment Kit - 500+Pcs NBR Buna-N Seals in AS568 Sizes (8) - Polypac

O-Ring Assortment Kit - 500+Pcs NBR Buna-N Seals in AS568 Sizes (3) - Polypac

O-Ring Assortment Kit - 500+Pcs NBR Buna-N Seals in AS568 Sizes (1) - Polypac

O-Ring Assortment Kit - 500+Pcs NBR Buna-N Seals in AS568 Sizes (4) - Polypac

O-Ring Assortment Kit - 500+Pcs NBR Buna-N Seals in AS568 Sizes (2) - Polypac

O-Ring Assortment Kit - 500+Pcs NBR Buna-N Seals in AS568 Sizes (9) - Polypac

Polypac O-Rings Wholesale Bulk Supply

Polypac supplies O-rings wholesale and bulk. Our large factory produces NBR, FKM, silicone, EPDM and FFKM O-rings with advanced testing and custom options for reliable sealing in industrial applications.

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Product Description

Polypac O-Rings Wholesale Bulk Supply

Polypac is a scientific and technical hydraulic seal manufacturer and oil seal supplier specializing in seal production, sealing material development, and customized sealing solutions for special working conditions. We offer o-rings wholesale bulk supply for businesses that need reliable, cost-effective sealing solutions in volume.

Why choose Polypac?

Founded in 2008, Polypac combines deep material knowledge with modern production lines. Our custom rubber ring and O-ring factory covers more than 10,000 square meters, with 8,000 square meters of production space. With advanced production and testing equipment and long-term cooperation with universities and research institutions, we deliver consistent quality you can trust.

Materials & applications

We manufacture O-rings in a wide range of materials to meet different environments and media. Common options include:

NBR (nitrile) — oil and fuel resistance
FKM (Viton) — high temperature and chemical resistance
Silicone — low temperature flexibility and food-grade options
EPDM — weather, steam and water resistance
FFKM — top-level chemical and thermal resistance for extreme conditions

These O-rings are suitable for hydraulics, pneumatics, automotive, industrial machinery, and general maintenance applications.

Quality, customization and bulk benefits

As one of China’s largest seal producers, Polypac emphasizes testing and traceability. We use industry-standard inspections to ensure dimensions, hardness and sealing performance. For bulk orders, we offer competitive pricing, consistent lead times, and the ability to produce custom sizes, durometers and compound formulations to match your needs.

Whether you need standard sizes in large quantities or tailored O-rings for special conditions, our experienced team can recommend the right material and design. Buying o-rings wholesale in bulk from Polypac means fewer supply disruptions, predictable costs, and seals engineered to perform.

Contact Polypac today for a quote or sample and ensure your next project uses dependable O-rings from a proven manufacturer.

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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 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.

Can I reuse a seal?

We strongly recommend never reusing seals. Once compressed and used, a seal takes a "set" and its elastic properties are degraded. Reusing it almost always results in a leak. Always install a new seal during any maintenance or repair.

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.

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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.

O-Ring Seals - Buna-N Nitrile Rubber Standard AS568 Sizes

O-rings are the most versatile and economical sealing solution for static and dynamic applications. Our nitrile rubber O-rings offer excellent resistance to petroleum-based oils, fuels, and hydraulic fluids, making them ideal for a wide range of industrial, automotive, and plumbing uses.

O-Ring Seals - Buna-N Nitrile Rubber Standard AS568 Sizes