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Polypac Pneumatic Seals — Reliable Sealing Solutions

Polypac Pneumatic Seals — Reliable Sealing Solutions

Overview

Polypac is a scientific and technical manufacturer specializing in Pneumatic Seals, hydraulic seals and oil seals. Founded in 2008, we combine decades of material science with scalable production to deliver seals that meet stringent industry demands. Our product portfolio covers filled PTFE variants and versatile elastomers including NBR, FKM, silicone, EPDM and FFKM.

Materials & Performance

Our Pneumatic Seals use optimized materials—bronze-filled, carbon-filled, graphite, MoS₂-filled and glass-filled PTFE—for low friction, high wear resistance and long service life. Elastomeric O-rings in NBR, FKM and FFKM provide superior sealing across pressures and temperatures, ensuring reliable performance in pneumatic actuators, valves and cylinders.

Manufacturing & Testing Capabilities

Polypac’s custom rubber ring and O-ring factory spans over 10,000 m² with 8,000 m² of advanced production space. We deploy industry-leading production and testing equipment to control tolerances, hardness, and material consistency—guaranteeing every Pneumatic Seal meets performance specifications and batch traceability.

Applications & Benefits

Designed for pneumatic systems, our seals reduce leakage, lower friction losses and extend maintenance intervals. Typical applications include pneumatic cylinders, servo systems, air preparation units and industrial automation. Benefits include enhanced energy efficiency, predictable life cycles and minimized downtime.

Customization & Special Conditions

Polypac excels at customized sealing solutions for special working conditions—high temperature, aggressive media, high speed or extreme pressure. Close collaboration with universities and research institutions enables rapid material development and prototype validation tailored to your application.

Quality Assurance & Support

From design consultation to production and testing, Polypac provides full-service support. Our QA processes ensure each Pneumatic Seal adheres to strict standards. Technical support and fast sampling help accelerate your design cycles and reduce time-to-market.

Why Choose Polypac

As one of China’s largest seal manufacturers, Polypac combines advanced materials, precision manufacturing and customer-focused customization. Choose Polypac for durable, high-performance Pneumatic Seals that protect equipment, improve efficiency and lower total cost of ownership.

FAQ:

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.

What is the purpose of the metal spring in a rotary shaft seal?

The garter spring in a shaft seal (e.g., FSKR, SPGO types) provides a constant radial force on the sealing lip. This ensures consistent contact with the rotating shaft, compensating for minor wear, eccentricity, and vibration to prevent lubricant leakage.

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 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.

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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Polypac Pneumatic Seals — Reliable Sealing Solutions
Overview
Materials & Performance
Manufacturing & Testing Capabilities
Applications & Benefits
Customization & Special Conditions
Quality Assurance & Support
Why Choose Polypac

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