dbde24e1-4012-47b6-8db4-e89ee4ca5a70 - Polypac

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Piston Seal Solutions — Polypac

Piston Seal Solutions — Polypac

Overview

Polypac specializes in engineering-grade Piston Seal products designed to deliver reliable, low-friction sealing in hydraulic and pneumatic cylinders. Founded in 2008, Polypac combines decades of material science and seal manufacturing experience to supply robust piston seals for demanding working conditions, from standard hydraulics to aggressive chemical and high-temperature environments.

Materials & Performance

Our piston seals are available in advanced filled PTFE (bronze, carbon, graphite, MoS₂, glass) and elastomers including NBR, FKM, silicone, EPDM, and FFKM. These material choices optimize wear resistance, low friction, chemical compatibility, and long service life. Piston Seal designs from Polypac reduce stick-slip, improve cycle life, and maintain sealing integrity under variable pressure and temperature ranges.

Design & Customization

Polypac provides fully customized Piston Seal designs to meet specific shaft diameters, groove geometries, tolerances, and special operating loads. Our 10,000+ m² manufacturing footprint (8,000 m² factory) and advanced CNC molding, extrusion, and testing equipment enable fast prototyping and scalable production. We collaborate with universities and research institutes to innovate seal profiles and compound formulations for unique applications.

Quality Assurance & Testing

Every piston seal undergoes strict dimensional inspection, material analysis, and dynamic performance testing to ensure leak-free operation. Our in-house labs and production controls guarantee consistent hardness, compression set, and abrasion metrics. Polypac’s quality systems focus on reproducibility and traceability for critical industrial and hydraulic applications.

Applications & Benefits

Polypac Piston Seals are ideal for hydraulic cylinders, construction and mining equipment, automotive actuators, oil & gas systems, and industrial presses. Customers benefit from reduced maintenance, lower downtime, and enhanced machine efficiency thanks to superior sealing performance and tailored material selection.

Why Choose Polypac

As a leading seal manufacturer and oil seal supplier, Polypac delivers technical support, rapid customization, and scalable manufacturing. Contact our engineering team for sample evaluations, material recommendations, and turnkey Piston Seal solutions tailored to your project needs.

Piston Seal Display

FAQ:

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.

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.

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.

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.

Table of Contents

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Piston Seal Solutions — Polypac
Overview
Materials & Performance
Design & Customization
Quality Assurance & Testing
Applications & Benefits
Why Choose Polypac
Piston Seal Display

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