Polypac Rod Seal for High Pressure Applications

Polypac rod seal designed for high-pressure hydraulic systems offers durable sealing, low friction, and custom materials. Backed by a 10,000 m² factory and advanced testing, we deliver reliable seals and tailored support for demanding conditions.

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Product Details

Product Overview

The Polypac rod seal for high pressure applications is engineered to provide reliable sealing in demanding hydraulic cylinders. Built for durability and low friction, this rod seal reduces leakage and extends equipment life in heavy-duty environments.

Designed for High Pressure

Our rod seal withstands high-pressure loads while maintaining tight sealing performance. The design minimizes extrusion and wear under repeated strokes, ensuring consistent operation in construction, mining, and industrial hydraulic systems.

Material & Quality

Polypac combines advanced materials such as filled PTFE (bronze, carbon, graphite, MoS₂, glass) and elastomers including NBR, FKM, silicone, EPDM, and FFKM. These materials are chosen to match pressure, temperature, and media compatibility needs, giving you a practical balance of strength and flexibility.

Why Choose Polypac

Polypac is a scientific and technical hydraulic seal manufacturer and oil seal supplier focused on sealing material development and customized solutions. Founded in 2008, our custom rubber ring and O-ring factory spans over 10,000 square meters with 8,000 m² of production space and industry-leading testing equipment.

Custom Solutions & Support

We work closely with clients to tailor seal dimensions and materials to special working conditions. Long-term cooperation with universities and research institutes ensures continuous improvement and reliable performance. Our team values your needs and provides responsive technical support from selection to testing.

Applications and Benefits

Ideal for hydraulic cylinders in mobile equipment, industrial presses, and high-pressure systems, Polypac rod seals reduce downtime and maintenance costs. Benefits include strong extrusion resistance, low friction, extended service life, and compatibility with diverse hydraulic fluids.

Ordering & Service

Contact Polypac for sample testing, custom quotes, and fast production. We prioritize clear communication and on-time delivery so your equipment stays protected and productive.

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Frequently Asked Questions

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.

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.

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.

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