Polypac High-Temp NBR O-Ring Kit

Polypac High-Temp NBR O-Ring Kit delivers durable, oil-resistant seals for hydraulic and industrial use. Available in a wide range of sizes, reliable up to 120°C, produced in Polypac’s advanced factory with strict quality control.

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Product Information

Product Overview

The Polypac High-Temp NBR O-Ring Kit is a practical, ready-to-use assortment of oil-resistant rubber O-rings designed for hydraulic, automotive, and general industrial applications. Made from a specially formulated high-temperature NBR (nitrile) compound, this kit combines affordability with dependable performance in demanding environments.

Why choose Polypac?

Polypac is a leading hydraulic seal manufacturer and oil seal supplier with a 10,000+ m² production base and advanced testing equipment. Since 2008 we’ve expanded from PTFE seals into a wide range of rubber O-rings, working closely with universities and research institutes to ensure high quality and continuous material improvement.

Key Benefits

High temperature capability: stable performance up to 120°C for many applications.
Excellent oil and fuel resistance: ideal for hydraulic systems and engines.
Wide size coverage: assortment includes popular sizes to fit common ports and fittings.
Durable and wear-resistant: extended service life under pressure and motion.
Available in multiple kit configurations to match repair and maintenance needs.

Typical Applications

Hydraulic cylinders, pumps, valves, fuel systems, compressors, and general machinery where oil resistance and elevated temperature tolerance are required.

Specifications & Options

The kit features NBR compound optimized for thermal and oil performance, generally with industry-standard hardness suitable for dynamic and static sealing. Kits are available in different counts and size ranges—suitable for maintenance teams, field service, and OEM stocking.

Quality & Support

Produced in Polypac’s modern facility with strict quality control and testing. Custom sizes and compounds are available upon request for special working conditions. Our technical team can advise on compatibility and selection.

Ready to reduce downtime and improve seal reliability? Choose the Polypac High-Temp NBR O-Ring Kit for trusted sealing performance backed by decades of seal manufacturing experience.

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Question you may concern

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.

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.

What is the purpose of the metal spring in a rotary shaft seal?

The garter spring in a shaft seal (e.g., FSKR, SPGO types) provides a constant radial force on the sealing lip. This ensures consistent contact with the rotating shaft, compensating for minor wear, eccentricity, and vibration to prevent lubricant leakage.

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.

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