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Polypac Rod Seals — Precision Rod Seal Manufacturer

Polypac — Leading Rod Seal Manufacturer for Hydraulic Systems

High-Performance Rod Seals

Polypac specializes as a rod seal manufacturer producing high-performance rod seals designed for hydraulic cylinders, mobile equipment, and industrial applications. Our rod seals deliver reliable leakage control, low friction, and extended service life across temperature extremes and harsh media. Whether you need standard profiles or engineered geometries, our seals ensure smooth piston travel and consistent system pressure retention.

Advanced Materials & Tailored Compounds

We began in 2008 developing filled PTFE compounds (bronze, carbon, graphite, MoS₂, glass) and have expanded to rubber and elastomer solutions including NBR, FKM, silicone, EPDM and FFKM. This material breadth lets Polypac tailor seal hardness, wear resistance, chemical compatibility and thermal performance to your working environment.

Custom Manufacturing & Industry-Leading Facilities

Polypac’s custom rubber ring and O-ring factory spans over 10,000 m² with 8,000 m² of production space and advanced manufacturing and testing equipment. As a rod seal manufacturer with deep R&D ties to universities and research institutions, we deliver customized sealing solutions for special working conditions—prototyping, small batch, and high-volume production are all supported.

Precision Testing & Quality Assurance

We apply rigorous quality control and comprehensive testing—dimensional inspection, material analysis, wear and friction testing, and simulated lifecycle trials—to ensure every rod seal meets or exceeds performance expectations. Our process documentation and traceability support OEM requirements and aftermarket reliability.

Applications & Performance Benefits

Polypac rod seals are used in hydraulic cylinders, excavators, agricultural machinery, injection molding equipment, and high-pressure industrial systems. Benefits include improved energy efficiency from reduced friction, minimized downtime from longer seal life, and optimized sealing under pressure fluctuations and abrasive conditions.

Why Choose Polypac

As a trusted rod seal manufacturer, Polypac combines material science, precision production, and responsive customization to solve your sealing challenges. Contact us for material recommendations, custom profiles, and engineering support to optimize seal life and system performance.

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FAQ:

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.

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 can I prevent seal damage during installation?

Use Tools: Always use dedicated installation tools (e.g., picks, cones, guides). Lubricate: Always lubricate the seal and the contact surface. Protect Sharp Edges: Cover sharp threads and edges with tape or use an installation sleeve. Check the Groove: Ensure the installation groove is clean, deburred, and undamaged.

Table of Contents

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Polypac — Leading Rod Seal Manufacturer for Hydraulic Systems
High-Performance Rod Seals
Advanced Materials & Tailored Compounds
Custom Manufacturing & Industry-Leading Facilities
Precision Testing & Quality Assurance
Applications & Performance Benefits
Why Choose Polypac
rod seal manufacturer Display

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