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

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Polypac Piston Seal — Reliable Hydraulic Sealing Solutions

Polypac piston seals offer low friction, high wear resistance and tailored solutions for demanding hydraulic systems. Manufactured with advanced materials and strict testing for long service life.

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Product Description

Product Overview

Polypac piston seals are engineered for reliable performance in hydraulic cylinders and other piston applications. Combining advanced filled PTFE compounds and elastomers, these seals deliver low friction, excellent wear resistance and stable sealing under pressure. Ideal for mobile equipment, industrial presses and heavy machinery.

Key Features

Low friction for smooth piston movement and reduced energy loss
High wear and extrusion resistance for longer service life
Wide temperature and chemical compatibility with multiple materials
Precision manufacturing and strict quality testing for consistent performance

Materials & Performance

Polypac started with filled PTFE materials and now offers a broad range: bronze-, carbon-, graphite-, MoS2- and glass-filled PTFE for sliding surfaces, plus NBR, FKM, EPDM, silicone and FFKM for elastomeric components. This material variety lets us tune seals for low friction, high load, or harsh chemical and temperature conditions.

Why Choose Polypac

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

Customization & Support

We provide tailored sealing solutions for special working conditions, fast OEM support and prototype development. Whether you need a standard piston seal or a fully customized design for extreme environments, Polypac offers quick turnaround, reliable tolerances and batch traceability.

Applications

Common uses include hydraulic cylinders for construction and agricultural machinery, industrial presses, injection molding machines and marine hydraulics. Polypac piston seals help reduce downtime, lower maintenance costs and improve system efficiency.

Contact Polypac to discuss your piston seal requirements and get a solution optimized for performance and longevity.

Product Images

FAQ

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.

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.

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.

When should I use a spring-energized seal instead of a standard elastomeric seal?

Consider a spring-energized seal (e.g., GSF, SPN types) for demanding applications involving: Extreme Temperatures (below -30°C or above +200°C) Aggressive Chemicals that elastomers can't handle Very Low Leakage or "Zero Leakage" requirements Poor Lubricity or dry running conditions The internal spring maintains constant sealing force, compensating for wear and system variables.

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

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