Polypac Hydraulic Rod Seals

Polypac's hydraulic rod seals deliver reliable sealing for cylinders in harsh conditions. Available in multiple materials, precision-made and customizable for high performance and long service life.

Get a free quote

Product Details

Polypac Hydraulic Rod Seals — Reliable sealing for demanding cylinders

Polypac hydraulic rod seals are engineered to protect hydraulic cylinders from leakage, contamination, and wear. Designed for smooth rod movement and long service life, these seals are ideal for construction equipment, industrial machinery, mobile hydraulics, and specialty applications where reliability matters.

Key features

Durable materials: PTFE variants and high-performance elastomers (NBR, FKM, EPDM, silicone, FFKM) for varied conditions.
Low friction and tight sealing: Minimized wear for longer maintenance intervals and improved system efficiency.
Precision manufacturing: Advanced production and testing equipment ensure consistent dimensions and performance.
Customizable: Profiles, sizes, and material blends tailored to pressure, temperature, and media.

Practical benefits

Choose Polypac rod seals to reduce downtime, lower total cost of ownership, and maintain hydraulic performance under pressure. Our seals resist extrusion, handle abrasive contaminants, and provide dependable sealing across a wide temperature range. The low friction design improves rod response and reduces energy loss.

Materials & customization

Rooted in PTFE expertise, Polypac offers filled PTFE options (bronze, carbon, graphite, MoS₂, glass) plus a broad selection of elastomers and high-performance compounds. Our large factory and modern tooling support quick custom runs and volume production. We work closely with customers and research institutions to develop solutions for special working conditions.

Why Polypac?

Founded in 2008, Polypac is a scientific and technical hydraulic seal manufacturer with over 10,000 m² facility and 8,000 m² factory space. We combine advanced equipment, experienced engineers, and collaborative R&D to deliver seals that meet global standards. Long-term partnerships with universities and research centers help us stay at the forefront of sealing technology.

For dependable hydraulic rod seals tailored to your application, contact Polypac for samples, drawings, and engineering support. We prioritize performance, delivery, and customer satisfaction.

Product Images

Frequently Asked Questions

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.

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.

How important is surface finish on the metal parts that contact the seal?

Extremely important. A rough surface will abrade and wear out the seal quickly, causing leaks. A finish that is too smooth can prevent a lubricating film from forming. A typical recommended surface finish for dynamic applications is 0.2 to 0.8 μm (8-32 μin) Ra.

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.

Let's talk