Polypac High Pressure Hydraulic Rod Seal

Polypac high pressure hydraulic rod seals deliver reliable sealing for cylinders working under extreme pressure and temperature. Custom materials, strict testing, and long factory experience ensure long service life and reduced maintenance.

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Product Information

High Pressure Hydraulic Rod Seal — Polypac

Polypac high pressure hydraulic rod seals are designed for heavy-duty hydraulic cylinders that demand dependable sealing under extreme pressure and harsh environments. Made with advanced materials and precision manufacturing, these rod seals minimize leakage, extend cylinder life, and reduce downtime.

Key Features

High-pressure performance: engineered for sustained sealing at elevated pressures.
Material options: PTFE blends, NBR, FKM, silicone, EPDM and FFKM to match oil, temperature, and wear needs.
Low friction: optimized profiles reduce stick-slip and improve energy efficiency.
Durability: wear-resistant formulations for longer service life in demanding applications.
Custom solutions: tailored sizes and compound choices for special working conditions.

Applications

These rod seals are ideal for construction equipment, mining machinery, agricultural hydraulics, mobile cranes, marine cylinders, and industrial presses. Wherever cylinders operate under high pressure and frequent cycling, Polypac rod seals deliver consistent performance.

Why Choose Polypac

Polypac is a scientific and technical hydraulic seal manufacturer and oil seal supplier. Our factory spans more than 10,000 m² with 8,000 m² of production space. Since 2008 we have evolved from filled PTFE seals to a full line of O-rings and custom rubber parts. We work with top universities and research institutes to develop materials and test methods. Our advanced equipment ensures tight tolerances and consistent quality.

Quality & Customization

Every seal undergoes strict inspection and testing to meet industry standards. We offer custom rubber rings and O-rings, speed up prototyping, and adapt compounds for extreme temperatures, chemical exposure, or abrasive media. Our engineering team assists with design choices to optimize seal life and reduce maintenance costs.

Choose Polypac high pressure hydraulic rod seals for proven reliability, material expertise, and scalable manufacturing. Contact us for samples, drawings, or a custom sealing solution tailored to your application.

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Q&A

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.

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.

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.

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