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

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Polypac Cylinder Repair Kit — Reliable Hydraulic Seal Solution

Polypac Cylinder Repair Kit offers a complete, easy-to-install solution for hydraulic cylinder maintenance. Featuring high-performance PTFE seals, O-rings, and customizable options, the kit ensures long life and dependable performance in harsh conditions.

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Product Description

Overview

The Polypac Cylinder Repair Kit is a complete seal replacement solution designed for hydraulic cylinders. Built from our decades of sealing expertise, each kit combines proven materials, precision parts and factory-tested quality to restore performance quickly and reliably.

Why Choose Polypac Cylinder Repair Kit

Polypac is a scientific and technical seal manufacturer with advanced production and testing facilities. Our kits stand out because they:

High-performance materials

We use industry-leading materials including filled PTFE variants and elastomers like NBR, FKM, EPDM and FFKM. These materials resist wear, chemicals and high temperatures to extend cylinder life.

Complete, easy-to-install kits

Each kit contains piston seals, rod seals, wipers, guide rings and O-rings sized for direct replacement. Clear packing and simple instructions speed up repairs and reduce downtime.

Custom solutions

With a 10,000+ m² facility and deep R&D ties to universities and labs, Polypac can produce custom seal kits for special working conditions or unusual cylinder designs.

Benefits at a Glance

Restore cylinder performance quickly and reduce leaks
Longer service life thanks to advanced materials and precision manufacture
Reduced maintenance time with complete, organized kits
Available custom sizing and material choices for harsh environments

Quality You Can Trust

Founded in 2008, Polypac combines extensive experience in filled PTFE products with a broad range of rubber O-rings and seals. Our production uses industry-leading equipment and rigorous testing, ensuring every kit meets high durability and performance standards.

Buy with Confidence

Whether you’re a maintenance shop, OEM or field technician, the Polypac Cylinder Repair Kit offers dependable parts and straightforward installation. Contact us to find a standard kit or request a custom package tailored to your equipment and working conditions.

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Frequently Asked Questions

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.

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.

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PRODUCTS

dbde24e1-4012-47b6-8db4-e89ee4ca5a70

Polypac Industrial Technology Co.,Ltd

+86 189 2463 6168

rose@dmsseals.com

No. 5, Hegui Mid Road, Hegui Industrial Park, Lishui Town, Nanhai District, Foshan City, Guangdong Province, P.R. China.

GSD Piston Seal | Bidirectional PTFE Seal for Hydraulic Cylinders

Polypac’s GSD Piston Seal is a bidirectional PTFE seal designed for hydraulic cylinders, delivering low friction performance and durability. Compatible with NBR O-Rings, it ensures efficient sealing and enhanced cylinder life in demanding applications. Ideal for smooth, reliable hydraulics.

GSD Piston Seal | Bidirectional PTFE Seal for Hydraulic Cylinders