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Polypac Hydraulic Rod Seal Solutions

Polypac Hydraulic Rod Seal Solutions

Product Overview

Polypac designs and manufactures High Quality hydraulic rod seal components engineered to prevent leakage, resist extrusion, and extend cylinder life. Our hydraulic rod seal portfolio combines precision molded rubber elements and filled PTFE parts to offer optimal friction control and long-term stability for reciprocating rods and pistons.

Materials & Customization

Choose from a wide range of sealing materials—NBR, FKM, EPDM, silicone, FFKM and filled PTFE variants (bronze, carbon, graphite, MoS2, glass)—all formulated to meet specific pressure, temperature, and chemical environments. Polypac’s in-house compound development and custom rubber ring production allow tailored hydraulic rod seal designs for special working conditions.

Performance & Testing

Our seals undergo strict quality control using advanced testing equipment to validate wear resistance, extrusion behavior, and dynamic sealing under real-world loads. Polypac’s decades of experience ensure each hydraulic rod seal meets ISO and industry performance benchmarks for durability and low leakage.

Applications & Industries

Polypac hydraulic rod seals serve mobile hydraulics, industrial cylinders, construction equipment, marine systems, and energy applications. Wherever reciprocating movement demands tight sealing and minimal friction, our products deliver reliable performance across harsh temperatures, high pressures, and contaminated environments.

Manufacturing Capacity & R&D

With a 10,000+ m² facility and 8,000 m² production space, Polypac combines large-scale manufacturing with cutting-edge equipment. Since 2008 we’ve partnered with top universities and research institutes to continuously improve sealing materials and production processes for our hydraulic rod seal lines.

Why Choose Polypac

As an award-winning seal manufacturer and oil seal supplier, Polypac stands out for technical know-how, custom-engineered solutions, and consistent product quality. Our integrated approach—from compound development to precision molding—reduces downtime and total cost of ownership for customers worldwide.

Get Started

Contact Polypac to specify a hydraulic rod seal solution tailored to your equipment and conditions. Our technical team will recommend materials, geometries, and testing protocols to ensure optimal sealing performance and longevity.

hydraulic rod seal Display

FAQ:

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.

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.

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.

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 Hydraulic Rod Seal Solutions
Product Overview
Materials & Customization
Performance & Testing
Applications & Industries
Manufacturing Capacity & R&D
Why Choose Polypac
Get Started
hydraulic rod seal Display

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