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Industrial Cylinder Seal Solutions by Polypac

Why Choose Polypac

Polypac is a scientific and technical hydraulic seal manufacturer and oil seal supplier committed to delivering durable Industrial Cylinder Seal solutions. Founded in 2008, our expertise combines deep materials knowledge with large-scale manufacturing capacity, ensuring consistent performance in demanding hydraulic and pneumatic cylinder applications.

Comprehensive Product Range

We produce a wide array of seals including filled PTFE variants (bronze, carbon, graphite, MoS₂, glass), plus elastomer O-rings in NBR, FKM, silicone, EPDM and FFKM. Our catalog covers rod seals, piston seals, guide rings and custom rubber rings engineered specifically for industrial cylinders and extreme working conditions.

Customization for Special Conditions

Polypac’s custom sealing solutions are tailored for high pressure, extreme temperature, aggressive media and long-life cycles. With a 10,000+ m² facility and 8,000 m² factory space, we rapidly develop prototype Industrial Cylinder Seal designs and scale production to meet OEM and maintenance requirements.

Advanced Manufacturing & Testing

Our production and testing equipment are among the most advanced in the industry. Every Industrial Cylinder Seal undergoes rigorous dimensional, material and performance testing to meet international standards — reducing downtime and extending cylinder service life.

R&D and Academic Collaboration

As one of China’s largest seal manufacturers, Polypac maintains long-term cooperation with universities and research institutions both domestically and internationally. This partnership-driven R&D supports new sealing materials and improved PTFE formulations for enhanced friction, wear resistance and sealing reliability.

Service & Support

From material selection to customized tooling and rapid prototyping, Polypac offers full-project support: engineering consultation, sampling, production and after-sales service. Contact us to source Industrial Cylinder Seal solutions tailored to your equipment and operating environment.

Industrial Cylinder Seal Display

FAQ:

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 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.

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.

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.

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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Industrial Cylinder Seal Solutions by Polypac
Why Choose Polypac
Comprehensive Product Range
Customization for Special Conditions
Advanced Manufacturing & Testing
R&D and Academic Collaboration
Service & Support
Industrial Cylinder Seal Display

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