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Hydraulic Seals & O-Rings by Polypac

Hydraulic Seals & O-Rings by Polypac

Precision Hydraulic Seal Manufacturing

Polypac specializes in Hydraulic seal production with over 15 years of focused expertise. Our custom rubber ring and O-ring factory spans more than 10,000 m² with 8,000 m² of factory space, enabling high-volume and precision manufacturing. From bronze-filled PTFE to MoS₂-filled PTFE, our seals are engineered to deliver low friction, high wear resistance, and long service life under severe operating conditions.

Materials Engineered for Performance

We offer a broad range of materials tailored to Hydraulic systems: filled PTFE (bronze, carbon, graphite, MoS₂, glass) and elastomers including NBR, FKM, silicone, EPDM, and FFKM. Material selection is driven by application demands—temperature, pressure, fluid compatibility, and speed—so you get the optimal balance of sealing reliability and durability.

Custom Sealing Solutions & R&D

Founded in 2008, Polypac has expanded from PTFE specialties into comprehensive sealing solutions. Our R&D collaborations with universities and research institutes allow rapid development of custom seals for special working conditions, including tailored O-rings and custom rubber parts for niche Hydraulic applications.

Advanced Production & Quality Control

Polypac's production and testing equipment are among the most advanced in the industry. Every Hydraulic seal undergoes strict inspection and life-cycle testing to meet international standards. Our quality-first approach reduces downtime and extends the operational life of your equipment.

Industry Applications & Benefits

Our seals serve mobile and industrial hydraulics, oil and gas, marine, and heavy machinery. Customers benefit from reduced leakage, improved energy efficiency, and lower maintenance costs—translating to measurable savings and higher uptime.

Why Choose Polypac

Choose Polypac for scientific expertise, proven materials knowledge, and customizable solutions. With one of China’s largest dedicated seal development teams, we deliver reliable Hydraulic sealing products that match your operational needs and regulatory requirements.

Hydraulic 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.

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.

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.

Table of Contents

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Hydraulic Seals & O-Rings by Polypac
Precision Hydraulic Seal Manufacturing
Materials Engineered for Performance
Custom Sealing Solutions & R&D
Advanced Production & Quality Control
Industry Applications & Benefits
Why Choose Polypac
Hydraulic Display

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