dbde24e1-4012-47b6-8db4-e89ee4ca5a70 - Polypac

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Polypac High Pressure Rod Seals

Polypac high pressure rod seals deliver reliable, low-friction sealing for hydraulic cylinders in extreme pressure and temperature conditions. Custom materials, advanced production, and rigorous testing ensure long life and leak-free performance.

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Product Information

Polypac High Pressure Rod Seals

Polypac high pressure rod seals are engineered for demanding hydraulic applications where reliability and durability matter. Designed to prevent leakage and withstand extreme pressures, these rod seals deliver consistent performance in construction, mining, mobile hydraulics, and industrial equipment.

Key Benefits

High-pressure sealing: Optimized profiles and materials for tight, long-lasting seals under heavy loads.
Low friction & wear resistance: Filled PTFE and advanced elastomers reduce wear and extend service life.
Wide operating range: Stable performance across a broad range of temperatures and hydraulic fluids.
Easy installation: Precise dimensions and consistent quality simplify assembly and reduce downtime.

Materials & Quality

Polypac offers rod seals in a variety of materials to match your working conditions: bronze-filled PTFE, carbon/PTFE blends, graphite PTFE, MoS₂-filled PTFE, glass-filled PTFE, and elastomers such as NBR, FKM, silicone, EPDM, and FFKM. Our production uses advanced manufacturing and testing equipment to ensure each seal meets strict performance standards.

Customization & Solutions

With a dedicated 10,000+ m² facility and an 8,000 m² factory space, Polypac provides tailored sealing solutions for special environments—high pressure, high temperature, aggressive fluids, or heavy wear. We work closely with universities and research institutes to develop custom compounds and seal geometries that solve real-world sealing challenges.

Why Choose Polypac?

Founded in 2008, Polypac combines decades of material expertise with large-scale production capabilities. Our rod seals stand out for reliability, long service intervals, and proven performance in harsh conditions. Whether you need standard sizes or a custom design, Polypac delivers precision seals that reduce leaks, maintenance, and downtime.

Contact Polypac today for technical support, material recommendations, and a quote tailored to your high pressure rod sealing needs.

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Q&A

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.

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 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.

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.

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