Polypac OEM Hydraulic Cylinder Rod Seals — Durable Custom Sealing Solutions

Polypac OEM hydraulic cylinder rod seals deliver reliable leak prevention and long service life. With advanced production, custom materials, and rigorous testing, Polypac provides tailored sealing solutions for demanding hydraulic applications.

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Product Information

Polypac OEM Hydraulic Cylinder Rod Seals

Polypac offers high-quality OEM hydraulic cylinder rod seals designed to prevent leakage, reduce wear, and extend cylinder life. Built for reliability, our seals are ideal for industrial, mobile, and heavy-duty hydraulic systems.

Why choose Polypac rod seals?

Proven materials: PTFE variants and elastomers like NBR, FKM, EPDM, silicone, and FFKM to suit pressure, temperature, and media.
Custom solutions: Designed for special working conditions—high temp, aggressive fluids, or abrasive environments.
Durability: Precise manufacturing and material selection reduce friction and improve wear life.
OEM readiness: Consistent tolerances and quality for easy integration into production lines.

Polypac — expertise you can trust

Founded in 2008, Polypac is a scientific and technical manufacturer specializing in seals and oil seals. Our custom rubber ring and O-ring factory spans over 10,000 m² with an 8,000 m² production space. We use advanced production and testing equipment and collaborate with universities and research institutes to develop reliable sealing materials and solutions.

Practical benefits for your application

Polypac rod seals offer clear value:

Reduced downtime thanks to longer service intervals.
Lower maintenance costs with robust seal performance.
Flexible material choices to match hydraulic fluid compatibility and temperature ranges.
Fast customization for OEM projects and special requirements.

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Whether you need standard OEM dimensions or a bespoke design, Polypac provides expert support from material selection to production and testing. Contact us to discuss your hydraulic cylinder rod seal needs and receive a tailored sealing solution that protects your equipment and improves reliability.

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Frequently Asked Questions

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.

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.

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.

How important is surface finish on the metal parts that contact the seal?

Extremely important. A rough surface will abrade and wear out the seal quickly, causing leaks. A finish that is too smooth can prevent a lubricating film from forming. A typical recommended surface finish for dynamic applications is 0.2 to 0.8 μm (8-32 μin) Ra.

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