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

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Polypac Rod Seals for Excavator Cylinders

Durable, low-friction rod seals for excavator cylinders by Polypac. Built with advanced materials and rigorous testing, customizable for harsh conditions to ensure long service life and minimal downtime.

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Product Information

Polypac Rod Seals for Excavator Cylinders

Polypac rod seals are designed to protect excavator cylinder rods from leakage, contamination and wear. Backed by decades of sealing expertise, our seals offer reliable hydraulic performance in tough construction and mining environments.

Why choose Polypac rod seals?

Proven reliability: Manufactured in our advanced facility with strict quality control and testing.
Low friction and long life: Special materials reduce wear and extend service intervals.
Customizable: Available in multiple compounds and sizes to match OEM and aftermarket needs.

Key features

High pressure resistance and extrusion protection for heavy-duty cycles.
Excellent abrasion and wear resistance to withstand grit and debris.
Wide temperature range for cold starts and hot operation.
Low friction formulation to reduce stick-slip and improve response.

Materials & compatibility

We offer seals made from advanced filled PTFE (bronze, carbon, graphite, MoS₂, glass) and elastomers such as NBR, FKM, silicone, EPDM and FFKM. This lets you choose the best material for oil types, temperatures and contaminants typical in excavator applications.

Polypac advantages

Polypac is a scientific and technical hydraulic seal manufacturer with a 10,000+ sqm facility and 8,000 sqm production area. Since 2008 we have developed PTFE-filled seals and expanded into diverse O-ring materials. We maintain long-term partnerships with universities and research institutes to stay at the cutting edge of sealing technology.

Installation, support and customization

Our rod seals are designed for straightforward installation and replacement. Polypac provides technical support, drawing reviews and customized designs for special working conditions. Whether you need standard sizes or tailored seals for extreme environments, we can deliver reliable solutions.

Summary

Polypac rod seals for excavator cylinders combine modern materials, precision manufacturing and industry testing to minimize leaks and downtime. Choose Polypac for dependable sealing performance and expert support.

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Frequently Asked Questions

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 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.

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.

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