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

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Polypac Piston Seal Manufacturer - High-Performance Hydraulic Seals

Polypac produces dependable piston seals and O-rings for hydraulic systems. With a modern 10,000+ m² facility, advanced testing, and custom solutions using filled PTFE, NBR, FKM and more, Polypac delivers reliable sealing for demanding conditions since 2008.

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Product Details

Polypac Piston Seals — Durable, Precise, Custom

Polypac is a scientific and technical manufacturer specializing in piston seals and hydraulic oil seals. Since 2008 we have focused on producing high-quality seals, developing sealing materials, and offering tailored solutions for special working conditions. Our factory spans over 10,000 square meters, with 8,000 square meters of production space and industry‑leading equipment for both manufacturing and testing.

Key Features

Reliable sealing performance that prevents leakage and extends equipment life.
Wide temperature and pressure compatibility for mobile and industrial hydraulics.
Fast customization for special sizes, tolerances, and materials.
Strict quality control with modern testing equipment to ensure consistency.

Materials and Compatibility

Polypac began with filled PTFE products (bronze, carbon, graphite, MoS₂, glass) and expanded to a broad range of elastomers. Common materials include NBR, FKM, silicone, EPDM, and FFKM. This variety lets us match seals to oil types, temperatures, and abrasive or corrosive environments for optimal performance.

Why Choose Polypac

We combine academic collaboration with practical experience. Long-term partnerships with universities and research institutions keep our material development and product design at the forefront of seal technology. Our large-scale production capacity and advanced machines let us deliver both standard piston seals and fully customized solutions quickly and reliably.

Quality Assurance & Testing

Every seal undergoes dimensional checks and performance testing to meet agreed specifications. Our in‑house testing reduces variability and ensures parts perform in real-world hydraulic systems. Consistent quality control gives customers confidence in long-term reliability.

Custom Solutions for Special Conditions

Whether you need seals for extreme temperatures, aggressive fluids, or high-wear applications, Polypac engineers craft solutions using the right materials and precision manufacturing. From prototype samples to full production runs, we support design, material selection, and timely delivery.

Contact Polypac for piston seals and O-rings that combine technical depth, proven materials, and dependable performance—trusted by customers since 2008.

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Frequently Asked Questions

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.

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.

How can I prevent seal damage during installation?

Use Tools: Always use dedicated installation tools (e.g., picks, cones, guides). Lubricate: Always lubricate the seal and the contact surface. Protect Sharp Edges: Cover sharp threads and edges with tape or use an installation sleeve. Check the Groove: Ensure the installation groove is clean, deburred, and undamaged.

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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