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

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Polypac Rod Seals for Heavy Machinery

Polypac rod seals provide durable, low-friction sealing for heavy machinery. Engineered from advanced materials and tested in harsh conditions, our seals ensure long life, reliable performance, and easy customization for demanding hydraulic systems.

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Product Information

Overview

Polypac rod seals for heavy machinery are designed to keep hydraulic systems running reliably in the toughest conditions. Backed by Polypac’s decades of sealing expertise, these rod seals minimize leakage, reduce maintenance, and protect components from contamination and wear.

Why Choose Polypac Rod Seals

As a scientific and technical manufacturer and oil seal supplier, Polypac combines advanced materials, precise manufacturing, and rigorous testing. Our factory covers more than 10,000 m², with modern production and testing equipment to ensure consistent quality. We work closely with universities and research institutes to develop seals that perform where others fail.

Reliable Performance

Polypac rod seals deliver stable sealing under high pressure, wide temperature swings, and dirty environments. Their low friction helps improve cycle life and reduce energy loss in hydraulic cylinders.

Proven Materials

We offer rod seals in a range of proven materials, including filled PTFE variants (bronze, carbon, graphite, MoS₂, glass) and elastomers like NBR, FKM, EPDM, silicone, and FFKM. This allows selection of the best material for temperature, chemical exposure, and pressure demands.

Features & Benefits

High wear and extrusion resistance for long service life
Low friction design to reduce energy consumption
Wide material options for chemical and temperature compatibility
Custom sizes and profiles to fit existing cylinders
Strict quality control and testing for dependable performance

Custom Solutions & Support

Since 2008, Polypac has expanded from PTFE seals to a full range of O-rings and custom rubber components. We provide tailored solutions for special working conditions, rapid prototyping, and volume production. Our technical team helps select materials and designs to meet your equipment needs.

Applications

Ideal for construction equipment, mining machines, agricultural hydraulics, cranes, and any heavy-duty hydraulic cylinder that requires reliable rod sealing under demanding conditions.

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Contact Polypac to discuss rod seal specifications, samples, or custom projects. Rely on our experience and testing capabilities to protect your hydraulic systems and reduce downtime.

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Question you may concern

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.

How do I choose the right material for my sealing application?

Material selection depends on four key factors: Media: What fluid or gas will the seal contact? (e.g., petroleum oil, water, chemicals, steam) Temperature: What is the minimum and maximum operating temperature? Pressure: What is the system's operating pressure? Are there pressure spikes? Application: Is it a static, dynamic, or rotary seal? Example: NBR (Buna-N) is excellent for standard hydraulic oil, while FKM (Viton®) is needed for high temperatures or aggressive chemicals.

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.

If you don’t find your answer, please E-mail us and we’ll be happy to help you out.

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