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Polypac Buna-N O-Ring Kits

Polypac Buna-N O-Ring Kits provide reliable NBR seals with excellent oil and wear resistance for hydraulic systems, automotive, pumps and valves. Custom sizes and strict quality control ensure long-lasting, cost-effective sealing solutions.

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Product Description

Polypac Buna-N O-Ring Kits — Reliable NBR Sealing Solutions

Polypac Buna-N O-Ring Kits deliver dependable sealing performance for hydraulic systems, oil equipment, automotive applications, pumps and valves. Made from high-quality NBR (Buna-N), these O-ring kits offer excellent resistance to petroleum oils, fuels and general hydraulic fluids, combined with strong mechanical properties for long service life.

Why choose our Buna-N O-Ring Kits?

Excellent oil & fuel resistance: Buna-N (NBR) stands out in oil and fuel environments, making it ideal for hydraulic seals and oil seals.
Wide application range: Suitable for pumps, compressors, valves, cylinders and general industrial equipment.
Durability and elasticity: Good abrasion resistance and rebound properties reduce maintenance frequency.
Custom sizes available: Polypac supplies tailored custom rubber ring solutions to match unique clearance or pressure needs.

Factory strength and quality assurance

Polypac is a scientific and technical hydraulic seal manufacturer with a custom rubber ring and O-ring factory covering over 10,000 m2 and an 8,000 m2 production area. We use advanced production and testing equipment, and collaborate with universities and research institutes to ensure consistent quality. Each Buna-N O-Ring Kit undergoes strict inspection so you receive reliable, ready-to-install parts.

Key specifications & benefits

- Material: Buna-N (NBR), optimized for oil and fuel exposure.
- Typical temperature range: -40°C to 120°C (application dependent).
- Available in standard and custom sizes to fit common housings and special working conditions.
- Ideal for maintenance kits, service packs and OEM replacements.

Get the right sealing solution

Whether you need a stocked maintenance kit or custom NBR O-rings for a specific hydraulic application, Polypac offers competitive supply, fast delivery and expert support. Choose Polypac Buna-N O-Ring Kits for proven performance, cost-effective sealing and peace of mind.

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Question you may concern

What is the difference between a static seal and a dynamic seal?

A Static Seal is used between two surfaces that do not move relative to each other (e.g., pipe flanges, end caps). O-rings and gaskets are common static seals. A Dynamic Seal is used between surfaces that do move (e.g., piston and cylinder, rotating shaft). Rod seals, piston seals, and rotary shaft seals are designed for this purpose.

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.

Why did my O-ring fail prematurely?

Common causes of O-ring failure include: Chemical Incompatibility: Swelling, softening, or cracking due to fluid exposure. Improper Sizing: Using an incorrect size leads to over-compression or inadequate sealing force. Abrasion: Wear and tear from rough surface finishes or contaminated fluid. Extrusion: The seal is forced into the gap between metal parts under high pressure. Installation Damage: Nicks, cuts, or twists during assembly.

What is the difference between NBR and FKM materials?

NBR (Nitrile/Buna-N): A general-purpose, cost-effective material with excellent resistance to petroleum-based oils and fuels. It has a standard temperature range of -30°C to +100°C (-22°F to +212°F). FKM (Fluoroelastomer/Viton®): A premium material with excellent resistance to high temperatures (up to 200°C+), chemicals, and oils. It is used in more severe environments but is more expensive than NBR.

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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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