Polypac Rod Seal for Hydraulic Cylinders

Polypac rod seals for hydraulic cylinders offer reliable sealing, low friction and long life. Available in PTFE variants and rubber compounds, they are custom-made to withstand harsh conditions and improve cylinder performance.

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Product Details

Polypac Rod Seal for Hydraulic Cylinders

Polypac rod seals are engineered to protect hydraulic cylinder rods from leakage, contamination and wear. Designed for smooth operation and long service life, our rod seals reduce maintenance needs and improve system efficiency. We combine proven materials and precise manufacturing to deliver seals you can trust.

Features

Our rod seals include the following practical features that add real value to your equipment:

Durable materials

Available in filled PTFE variants (bronze, carbon, graphite, MoS2, glass) and standard rubber compounds (NBR, FKM, silicone, EPDM, FFKM). Materials are chosen for low friction, wear resistance and compatibility with hydraulic fluids.

Precision fit

Manufactured to tight tolerances for a stable seal and consistent performance across pressure and temperature ranges.

Custom solutions

Polypac provides tailored dimensions and compound formulations for special working conditions, ensuring the right seal for each application.

Benefits

With Polypac rod seals you get:

Reduced leakage and extended cylinder life
Lower friction for smoother rod movement and less energy loss
Improved resistance to wear, chemicals and high temperatures
Quick replacement options and compatible O-ring choices

Applications

Ideal for construction machinery, agricultural equipment, industrial presses, marine hydraulics and any system where reliable rod sealing matters. We help choose the right material and design for your environment.

Why Choose Polypac

Founded in 2008, Polypac is a scientific and technical seal manufacturer with a 10,000+ square meter facility and 8,000 square meters of factory space. We specialize in seal production, sealing material development and customized sealing solutions. Our advanced production and testing equipment and partnerships with universities ensure high-quality, research-backed products. We value long-term customer relationships and provide responsive support to select the best rod seal for your needs.

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Contact Polypac for consultation or a sample. We tailor rod seals for your hydraulic cylinders to deliver performance, reliability and peace of mind.

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Question you may concern

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.

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.

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.

If you have another questions, please feel free to contact us.

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