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Premium Heavy Duty Hydraulic Rod Seals by Polypac

Heavy Duty Hydraulic Rod Seals — Durable Performance for Demanding Systems

Reliable Sealing Under Extreme Conditions

Polypac's heavy duty hydraulic rod seals are designed to withstand high pressure, abrasive contaminants, and rapid dynamic motion. Using filled PTFE blends and advanced elastomers, our seals provide low friction, minimal wear, and consistent rod protection for heavy machinery, mobile equipment, and industrial hydraulic cylinders.

Advanced Materials and Custom Formulations

We specialize in custom materials — bronze-filled, carbon-filled, graphite-filled, MoS2-filled, and glass-filled PTFE — plus elastomers like NBR, FKM, silicone, EPDM, and FFKM. These options allow Polypac to tailor heavy duty hydraulic rod seals to temperature, chemical exposure, and pressure requirements for optimal service life.

Precision Manufacturing and Testing

Polypac's facility covers over 10,000 m² with 8,000 m² of factory space and industry-leading production and testing equipment. Every heavy duty hydraulic rod seal undergoes dimensional control, friction and leakage testing, and endurance trials to meet stringent performance specifications.

Engineered Solutions for Special Working Conditions

From abrasive slurry pumps to high-cycle construction hydraulics, Polypac develops customized sealing solutions for special working conditions. Our long-term collaborations with universities and research institutes ensure our heavy duty hydraulic rod seals incorporate the latest sealing science and material advances.

Why Choose Polypac

Founded in 2008, Polypac combines scientific expertise with manufacturing scale to deliver reliable, cost-effective heavy duty hydraulic rod seals. As one of China’s largest seal developers, we offer fast prototyping, volume production, and global supply capabilities backed by quality control and on-site technical support.

Get Customized Sealing Solutions

Whether you need standard inventory or bespoke rod seals for extreme environments, contact Polypac for consultation, material selection, and sample testing. Choose heavy duty hydraulic rod seals engineered to extend cylinder life, reduce downtime, and improve system efficiency.

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FAQ:

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.

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 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.

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.

Table of Contents

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Heavy Duty Hydraulic Rod Seals — Durable Performance for Demanding Systems
Reliable Sealing Under Extreme Conditions
Advanced Materials and Custom Formulations
Precision Manufacturing and Testing
Engineered Solutions for Special Working Conditions
Why Choose Polypac
Get Customized Sealing Solutions
heavy duty hydraulic rod seals Display

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