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Cylinder Seal Solutions - Polypac Hydraulic Seals & O-Rings

High Quality Cylinder Seal Solutions by Polypac

Polypac delivers industry-leading Cylinder Seal products engineered for reliable performance in demanding hydraulic and pneumatic systems. Drawing on years of material science and precision manufacturing, our Cylinder Seal range minimizes leakage, resists extrusion, and extends service life—critical for construction, agricultural, and industrial equipment.

Advanced Materials & Manufacturing

We produce Cylinder Seal components using a broad spectrum of materials including filled PTFE (bronze, carbon, graphite, MoS2, glass), NBR, FKM, EPDM, silicone, and FFKM. Our 10,000+ sqm facility and 8,000 sqm production area house advanced molding, machining, and testing equipment to ensure consistent tolerances and optimal compound properties for each application.

Custom Design for Special Working Conditions

Polypac specializes in tailor-made Cylinder Seal solutions for extreme temperature, high pressure, abrasive media, and aggressive chemical environments. Our engineering team collaborates with customers to select materials, geometries, and coatings that match dynamic sealing demands and extend maintenance intervals.

Rigorous Testing & Quality Assurance

Every Cylinder Seal undergoes strict testing—pressure cycling, friction measurement, wear rate, and chemical compatibility—to meet ISO and industry-specific standards. Long-term reliability is verified through accelerated life testing and real-world simulation to guarantee performance in critical applications.

Research Partnerships & Continuous Innovation

As one of China’s largest seal manufacturers, Polypac maintains long-term partnerships with universities and research institutes to refine sealing compounds and manufacturing techniques. This continuous innovation ensures our Cylinder Seal lineup stays at the forefront of material science and sealing technology.

Applications & Market Sectors

Our Cylinder Seal solutions are widely used in hydraulic cylinders, actuators, mobile equipment, industrial presses, and fluid control systems. Polypac serves OEMs and aftermarket customers who demand precision, durability, and fast delivery.

Why Choose Polypac

Choose Polypac for expert material selection, custom engineering, strict QC, and rapid prototyping. Contact us to discuss your Cylinder Seal requirements—our team will propose cost-effective, high-performance sealing solutions tailored to your system.

Cylinder Seal Display

FAQ:

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.

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.

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.

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.

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.

Table of Contents

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High Quality Cylinder Seal Solutions by Polypac
Advanced Materials & Manufacturing
Custom Design for Special Working Conditions
Rigorous Testing & Quality Assurance
Research Partnerships & Continuous Innovation
Applications & Market Sectors
Why Choose Polypac
Cylinder Seal Display

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