Polypac Mini O-Ring Kit — Compact Sealing Solutions

Polypac Mini O-Ring Kit — Precision Seals for Compact Applications

Why choose a mini O-Ring kit?

The Polypac mini O-Ring kit provides a convenient assortment of small, precision O-rings ideal for instrumentation, micro-hydraulics, sensors, and maintenance kits. Each kit is curated to supply multiple sizes and material options so technicians and engineers can quickly identify the correct seal on-site. Choosing a mini O-Ring kit reduces downtime, simplifies inventory, and ensures compatibility across diverse small-bore sealing needs.

Materials & chemical compatibility

Polypac offers mini O-Ring kit components in industry-standard elastomers including NBR, FKM (Viton®), silicone, EPDM, and high-performance FFKM. These materials cover a broad temperature range and resist oils, fuels, hydraulic fluids, steam, and aggressive chemicals. Material selection guidance is provided with every kit to match service conditions—temperature, pressure, media—helping you choose the right O-ring for longevity and leak-free performance.

Manufacturing expertise & quality assurance

As a scientific and technical hydraulic seal manufacturer founded in 2008, Polypac combines large-scale production capacity (10,000+ m² facility) with advanced production and testing equipment. Our mini O-Ring kit parts are produced under strict quality controls, with dimensional inspection, hardness testing, and material traceability. Collaborations with universities and research institutions support continuous material development and validation to meet ISO and industry standards.

Customization & tailored solutions

Beyond off-the-shelf mini O-Ring kits, Polypac provides customized kits and bespoke O-ring formulations for special working conditions—filled PTFE blends, proprietary compounds, or precision tolerances. Our technical team supports rapid prototyping and small-batch runs when a standard kit cannot meet unique sealing demands, ensuring optimal performance in critical applications.

Applications, support & ordering

Mini O-Ring kits are ideal for field service, OEM spare parts, laboratories, and quality control benches. Polypac supports customers with application consultation, material data sheets, and reliable supply chains. Order standard kits or request custom assortments directly—our responsive technical sales team ensures the right mini O-Ring kit for your project and offers fast delivery for urgent maintenance needs.

mini O-Ring kit Display

FAQ:
What is the difference between NBR and FKM materials?

NBR (Nitrile/Buna-N): A general-purpose, cost-effective material with excellent resistance to petroleum-based oils and fuels. It has a standard temperature range of -30°C to +100°C (-22°F to +212°F). FKM (Fluoroelastomer/Viton®): A premium material with excellent resistance to high temperatures (up to 200°C+), chemicals, and oils. It is used in more severe environments but is more expensive than NBR.

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.

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.

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.

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