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Polypac Metric O-Ring Kits — Reliable Precision Sealing Solutions

Polypac Metric O-Ring Kits — Precision, Performance, Proven

Trusted Manufacturer Backed by Expertise

Polypac is a scientific and technical hydraulic seal manufacturer and oil seal supplier specializing in seal production, sealing material development, and customized sealing solutions for special working conditions. Founded in 2008, our factory spans over 10,000 m² with 8,000 m² of dedicated production space, advanced equipment, and long-term collaboration with universities and research institutions to ensure each Metric O-Ring Kit meets rigorous performance standards.

Comprehensive Material Selection

Our Metric O-Ring Kits are available in NBR, FKM (Viton), silicone, EPDM, and FFKM to match chemical compatibility, temperature ranges, and mechanical requirements. Whether you need cost-effective NBR for general hydraulic use or FFKM for extreme chemical resistance, Polypac offers the right compound and durometer to extend seal life and reduce downtime.

Precision Sizing and Customization

Each Metric O-Ring Kit is engineered for dimensional accuracy and ease of installation. We provide standard metric sizes as well as custom rings for uncommon grooves and special working conditions. Our in-house tooling and testing capabilities allow fast prototyping, bespoke kits, and tight tolerance control—ideal for OEMs and maintenance teams seeking reliable inventory solutions.

Quality Control and Performance Testing

Polypac’s production and testing equipment are among the most advanced in the industry. Every Metric O-Ring Kit undergoes physical, chemical and dimensional testing to verify hardness, compression set, and sealability under hydraulic and oil service conditions. This rigorous QA reduces field failures and ensures consistent performance across batches.

Why Choose Polypac Metric O-Ring Kits?

With decades of material expertise—from filled PTFE origins to modern elastomers—Polypac combines manufacturing scale, R&D partnerships, and responsive customization. Choose our Metric O-Ring Kits for dependable sealing, simplified inventory, and expert technical support for demanding hydraulic and oil seal applications.

Metric O-Ring Kits Display

FAQ:

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.

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.

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.

Table of Contents

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Polypac Metric O-Ring Kits — Precision, Performance, Proven
Trusted Manufacturer Backed by Expertise
Comprehensive Material Selection
Precision Sizing and Customization
Quality Control and Performance Testing
Why Choose Polypac Metric O-Ring Kits?
Metric O-Ring Kits Display

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