Excavator Rod Seal Solutions by Polypac

Excavator Rod Seal Solutions by Polypac

Overview

Polypac designs and manufactures High Quality Excavator Rod Seal products engineered for heavy-duty hydraulic cylinders. As a scientific and technical hydraulic seal manufacturer and oil seal supplier, Polypac combines decades of material science and application expertise to deliver rod seals that minimize leakage, resist abrasion, and extend service life under high pressure, contamination, and extreme temperatures.

Materials & Seal Types

We produce Excavator Rod Seal assemblies from advanced polymers and composites, including filled PTFE (bronze, carbon, graphite, MoS₂, glass), NBR, FKM, EPDM, silicone, and FFKM. Our material choices and blends are optimized for friction control, chemical resistance, and wear life—ensuring seals perform reliably across varied hydraulic fluids and operating environments.

Precision Manufacturing & Testing

Polypac's custom rubber ring and O-ring factory spans over 10,000 m² with 8,000 m² of production space and industry-leading equipment. Every Excavator Rod Seal undergoes strict dimensional control, compound verification, and dynamic testing to meet OEM tolerances and field durability requirements. Long-term collaborations with universities and research institutions reinforce our R&D and quality assurance processes.

Performance & Applications

Built for excavators, backhoes, and heavy construction machinery, our rod seals deliver exceptional sealing under shock loads, contaminated media, and rapid cycling. The Excavator Rod Seal solutions from Polypac reduce maintenance intervals, protect hydraulic systems from ingress, and improve uptime—translating to lower total cost of ownership for fleet operators.

Customization & Engineering Support

Polypac specializes in customized sealing solutions for special working conditions. From custom-profile rod seals to tailored compound formulations, our engineering team provides application assessment, prototype development, and on-site support to ensure optimal performance in your excavator systems.

Why Choose Polypac

With a heritage beginning in 2008 and continuous product expansion, Polypac is one of China’s largest dedicated seal manufacturers. Choose Polypac for Excavator Rod Seal expertise, robust material options, advanced testing, and responsive customization. Contact us to specify seals that protect your hydraulics and maximize machine reliability.

Excavator Rod Seal Display

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.

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.

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.

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.

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