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

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Polypac Dust Seal — Durable Dust Seals for Hydraulic Equipment

Polypac Dust Seals protect hydraulic rods from dust and contaminants, prolong component life, and are available in custom sizes and materials. Backed by advanced manufacturing and responsive support.

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Product Details

Product Overview

Polypac Dust Seals are designed to keep dirt, dust and debris out of hydraulic and pneumatic systems. They form a reliable barrier at rod and piston interfaces to protect internal seals and moving parts. Simple to install and available in standard and custom sizes, these dust seals help reduce maintenance frequency and downtime.

Key Benefits

Effective protection: Prevents contaminants from entering hydraulic cylinders and damaging internal seals.
Extended service life: Reduces wear on rods and primary seals, lowering replacement costs.
Low friction design: Smooth operation minimizes resistance for consistent performance.
Easy installation: Fits common housings and can be supplied for rapid retrofit.

Materials & Customization

Polypac offers dust seals in a range of materials suited to different environments — including NBR for general use, FKM for high temperature and chemical resistance, and polyurethane for wear resistance. We also support special compounds and custom dimensions to meet unusual working conditions. If you need tailored hardness, lip profiles, or packaging, our team provides practical solutions.

Why Choose Polypac

Founded in 2008, Polypac combines strong R&D with large-scale production. Our custom rubber ring and O-ring factory spans over 10,000 m² with 8,000 m² of factory space and industry-leading production and testing equipment. We maintain partnerships with universities and research institutes to continuously improve materials and designs.

Customer-first Service

We value your needs: quick samples, clear lead times, and technical support are standard. Whether you need a simple replacement dust seal or a custom sealing solution for a challenging environment, Polypac delivers reliable products and attentive service to keep your equipment running.

Applications

Ideal for hydraulic cylinders, pneumatic equipment, construction machinery, agricultural machinery, and industrial automation where contamination protection is essential.

Contact Polypac for tailored dust seal solutions that protect your systems and reduce operating costs.

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Q&A

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.

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.

How important is surface finish on the metal parts that contact the seal?

Extremely important. A rough surface will abrade and wear out the seal quickly, causing leaks. A finish that is too smooth can prevent a lubricating film from forming. A typical recommended surface finish for dynamic applications is 0.2 to 0.8 μm (8-32 μin) Ra.

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.

If you have another questions, please feel free to contact us.

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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.

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