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Custom Rod Seals by Polypac — Precision Hydraulic Sealing Solutions

Custom rod seals: engineered for reliability

Polypac's Custom rod seals are engineered to provide leak-free performance in dynamic hydraulic rod applications. Combining decades of sealing expertise with advanced materials and precision manufacturing, our rod seals control fluid loss, resist extrusion, and sustain high-pressure, high-speed, and temperature-variable environments.

Why choose Polypac Custom rod seals

Polypac stands out as a scientific and technical hydraulic seal manufacturer. Founded in 2008, we specialize in Custom rod seals and oil seals, offering OEM-grade quality, rapid prototyping, and long-term R&D partnerships with universities and research institutions. Our global customers benefit from consistent performance, competitive lead times, and tailored sealing solutions for special working conditions.

Materials & performance capabilities

We produce Custom rod seals from advanced filled PTFE variants — bronze-filled, carbon-filled, graphite-filled, MoS₂-filled, and glass-filled PTFE — as well as elastomers including NBR, FKM, silicone, EPDM, and FFKM. This material breadth lets us optimize seals for chemical compatibility, temperature ranges, friction characteristics, and wear resistance across industrial, mobile, and marine hydraulics.

Precision production and rigorous testing

Our custom rubber ring and O-ring factory covers over 10,000 m² with 8,000 m² of production space, equipped with industry-leading manufacturing and testing systems. Every Custom rod seals design undergoes dimensional control, material verification, and dynamic testing to validate leakage, friction, and life-cycle performance before delivery.

Applications and industry use

Polypac's Custom rod seals are deployed across construction equipment, aerospace actuators, agricultural hydraulics, injection molding machines, and specialty industrial systems. We tailor seal geometries and compound selections to meet pressure, speed, temperature, and contamination challenges.

Customization, support and ordering

From prototype to mass production, Polypac offers technical consultation, CAD-driven design reviews, and small-batch tooling for Custom rod seals. Contact our engineering team for sample runs, material recommendations, and certification support to integrate reliable sealing solutions into your equipment.

Custom rod seals Display

FAQ:

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.

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 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 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.

Table of Contents

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Custom rod seals: engineered for reliability
Why choose Polypac Custom rod seals
Materials & performance capabilities
Precision production and rigorous testing
Applications and industry use
Customization, support and ordering
Custom rod seals Display

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