Polypac NBR O-Ring Repair Kit for Hydraulic Seals

Polypac NBR O-ring repair kit delivers fast, reliable repairs for hydraulic seals. Oil-resistant, durable and compact, it’s ideal for on-site maintenance across a wide range of hydraulic equipment.

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Product Information

Polypac NBR O-Ring Repair Kit for Hydraulic Seals

Polypac’s NBR O-ring repair kit is a ready-to-use solution designed to restore hydraulic seals quickly and reliably. The kit contains a comprehensive selection of oil-resistant NBR (nitrile) O-rings in common sizes, making field repairs simple and minimizing downtime.

Key Features

High-quality NBR material with excellent oil and abrasion resistance.
Wide size range to fit most hydraulic fittings and cylinders.
Compact, organized case for easy storage and fast parts selection.
Visible labeling and clear size layout to reduce installation errors.
Durable rings with consistent dimensions for dependable sealing.

Benefits

Quick on-site repairs: get systems back to work without long waits.
Cost-effective maintenance: replace only worn O-rings instead of entire assemblies.
Improved reliability: reduce leaks and extend equipment life.
Easy to use: suitable for technicians with basic seal installation skills.

Applications

Ideal for hydraulic pumps, cylinders, valves, fittings and mobile equipment. The kit suits industrial, agricultural, construction and marine hydraulic systems where oil resistance and dependable sealing are essential.

Why Choose Polypac

Polypac is a technical manufacturer specializing in seal production, materials development and tailored sealing solutions. With a modern 10,000+ m² facility and advanced testing equipment, we combine industry experience with research partnerships to deliver consistent quality. Since 2008, Polypac has expanded from PTFE seals to a full range of elastomers—including NBR, FKM, silicone, EPDM and FFKM—ensuring you get the right material for the job.

Choose the Polypac NBR O-ring repair kit for a practical, proven solution that keeps hydraulic systems running. Compact, reliable and engineered for field use—it's the smart choice for maintenance teams seeking fast, effective seal repairs.

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FAQ

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.

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.

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.

How do I choose the right material for my sealing application?

Material selection depends on four key factors: Media: What fluid or gas will the seal contact? (e.g., petroleum oil, water, chemicals, steam) Temperature: What is the minimum and maximum operating temperature? Pressure: What is the system's operating pressure? Are there pressure spikes? Application: Is it a static, dynamic, or rotary seal? Example: NBR (Buna-N) is excellent for standard hydraulic oil, while FKM (Viton®) is needed for high temperatures or aggressive chemicals.

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