Polypac Rod Seal for Hydraulic Cylinder

Polypac rod seals deliver reliable sealing for hydraulic cylinders with durable materials, precise fit, and tailored solutions. Backed by advanced production, material expertise, and responsive customization, our rod seals reduce leakage and extend equipment life.

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Product Details

Product Overview

Polypac rod seals for hydraulic cylinders are engineered to prevent fluid leakage, reduce contamination, and ensure smooth piston rod movement under pressure. Designed for a wide range of working conditions, our rod seals combine durable elastomers and filled PTFE options to meet your performance needs.

Key Benefits

Reliable sealing to minimize leaks and maintenance costs
Long-lasting materials that resist wear, heat, and chemicals
Precision dimensions for easy installation and consistent performance
Custom designs available for special pressures, speeds, and temperatures

Materials & Options

We offer rod seals in a variety of materials to match specific environments: NBR, FKM, EPDM, silicone, FFKM, and advanced PTFE compounds (bronze-filled, carbon-filled, graphite, MoS₂-filled, glass-filled). Choose elastomers for flexibility and PTFE-based seals for high wear and temperature resistance.

Applications

Polypac rod seals are suitable for construction machinery, agricultural equipment, industrial hydraulics, marine systems, and any hydraulic cylinder where leak-free, durable sealing is essential. Our designs support both standard and heavy-duty operations.

Why Choose Polypac?

Polypac is a scientific and technical hydraulic seal manufacturer with a 10,000+ m² facility and 8,000 m² factory space. Founded in 2008, we began with filled PTFE seals and now produce diverse sealing solutions including custom rubber rings and O-rings. Our advanced production and testing equipment, combined with partnerships with universities and research institutions, ensure high-quality, consistent products. We listen to your needs and provide tailored seals for special working conditions so your equipment performs reliably.

Quality Assurance & Support

Each rod seal undergoes strict testing before shipment. Our team offers technical support to help select the right material and profile, ensuring the best balance of cost, durability, and performance.

Contact Polypac to discuss your rod seal requirements and get a customized sealing solution that reduces downtime and extends service life.

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FAQ

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.

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.

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.

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.

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

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