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

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Polypac Ball-Head Dust Ring

Polypac Ball-Head Dust Ring provides durable protection for hydraulic rods and shafts. Designed for low friction, long life, and easy installation, it keeps contaminants out and extends seal system life. Custom sizes and materials available.

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Product Details

Product Overview

The Polypac Ball-Head Dust Ring is a high-performance wiper designed to protect hydraulic and pneumatic rods from dust, dirt and moisture. Its ball-head profile gives a reliable wiping action while minimizing contact friction, helping seals last longer and systems run cleaner.

Key Features & Benefits

Efficient contamination exclusion: effectively wipes off debris and prevents contaminants from entering the seal chamber.
Low friction design: ball-head geometry reduces wear on the rod and the dust ring itself.
Extended seal life: protects primary seals and bearings, lowering maintenance frequency and cost.
Easy installation: flexible design fits common rod sizes and allows quick replacement.
Wide application range: suitable for hydraulic cylinders, pneumatic cylinders, industrial actuators and mobile equipment.

Materials & Compatibility

Polypac supplies Ball-Head Dust Rings in a variety of materials to match operating conditions: molded PTFE blends for low friction and chemical resistance, NBR for general-purpose oil resistance, FKM for high-temperature and aggressive fluids, EPDM for weather and water resistance, and custom compounds including filled PTFE where required. We help you choose the best material for temperature, pressure, and media.

Customization & Sizes

With over 10,000 m² of factory space and advanced production equipment, Polypac offers custom sizes, tolerances, and compound formulations. Whether you need metric, inch, or special profiles for unique shafts, we provide precise manufacturing and quick turnaround.

Why Choose Polypac

Trusted Expertise

Founded in 2008, Polypac is a scientific and technical seal manufacturer focused on sealing materials and tailored solutions. We collaborate with universities and research institutions and maintain rigorous testing to ensure product reliability.

Quality Assurance

Our production and testing capabilities meet industry standards, offering consistent performance and long-term support. For demanding environments, we recommend specific compounds and can provide sample runs and technical datasheets.

Order & Support

Contact Polypac for sample requests, technical guidance, or custom quotes. Our team will help you select the right Ball-Head Dust Ring to protect your equipment and reduce downtime.

FAQ

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.

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 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.

If you have any other questions, please write email to us or call us , we will reply you as soon as possible.

Get in Touch

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.

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