Hydraulic Cylinder Rod Seal Replacement — Polypac

Polypac hydraulic cylinder rod seal replacement offers durable, precision-made seals in PTFE and elastomers. Custom solutions, strict testing, and easy installation ensure leak-free performance and longer service life.

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Product Details

Hydraulic Cylinder Rod Seal Replacement by Polypac

When a hydraulic rod seal fails, downtime, leaks, and lost productivity follow. Polypac's hydraulic cylinder rod seal replacement parts are designed to restore performance quickly and reliably. We combine proven materials, precise manufacturing, and custom options to fit most cylinder designs and working environments.

Key Features

Material options: filled PTFE (bronze, carbon, graphite, MoS2, glass) and elastomers like NBR, FKM, EPDM, silicone, FFKM
High wear resistance and low friction for smooth rod movement
Precision tolerances for tight sealing and reduced leak risk
Sizes and profiles available for standard and custom cylinders

Benefits of Replacement Seals

Replacing worn rod seals with Polypac parts improves seal life and system reliability. Customers get reduced maintenance, better hydraulic efficiency, and lower risk of contamination and corrosion. Our seals are made to minimize downtime and maintenance costs.

Materials & Compatibility

We started with filled PTFE and continue to lead in advanced sealing materials. For rod seal replacement, choose from a wide range to match temperature, pressure, and chemical exposure. Polypac provides clear recommendations so you get the right material for your application.

Why Choose Polypac

Polypac is a scientific and technical hydraulic seal manufacturer with a 10,000+ m² custom rubber ring and O-ring factory and 8,000 m² production space. Founded in 2008, we invest in advanced equipment and partner with universities and research institutes to ensure durable, tested products. Our engineering support helps you select or design the optimal rod seal replacement.

Installation & Support

Our rod seals are designed for straightforward replacement and come with installation guidance. For special working conditions, Polypac offers custom seal design, rapid prototyping, and quality testing. Contact our team for a quote, material advice, or to order replacement seals matched to your cylinders.

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Q&A

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.

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.

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.

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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