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

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Polypac Contamination Seal Solutions

Polypac Contamination Seal Solutions

Polypac delivers high-performance Contamination Seal products designed to protect hydraulic and rotating systems from particulate, fluid ingress, and environmental contaminants. With more than 10,000 m² of manufacturing space and advanced production/testing equipment, we combine scientific R&D and practical manufacturing to ensure seals meet rigorous contamination control and longevity requirements.

Materials & Specialty Fillers

Our Contamination Seal portfolio includes filled PTFE variants (bronze, carbon, graphite, MoS₂, glass) alongside elastomers such as NBR, FKM, silicone, EPDM, and FFKM. Material selection is driven by operating temperature, chemical compatibility, abrasion resistance, and particulate exclusion — enabling tailored solutions for extreme or contamination-sensitive environments.

Custom Design & Manufacturing

Polypac offers bespoke Contamination Seal design — from custom rubber rings and O-rings to complex PTFE assemblies. Our engineering team collaborates with clients to optimize geometry, clearance, and surface interactions, minimizing leak paths and particle ingress while maintaining seal life and system efficiency.

Testing, Quality & Research Collaboration

Rigorous testing protocols validate our Contamination Seal performance under pressure, temperature cycling, and contaminated media. As one of China’s leading seal manufacturers, we maintain long-term partnerships with universities and research institutes to continuously improve seal formulations and contamination-control techniques.

Applications & Industry Benefits

Ideal for hydraulic cylinders, valves, pumps, rotary shafts, and critical oil-sealed systems, our Contamination Seal solutions reduce downtime, extend equipment life, and lower maintenance costs. Industries served include mobile hydraulics, industrial machinery, oil & gas, and aerospace where contamination control is mission-critical.

Why Choose Polypac

Founded in 2008, Polypac blends decades of material expertise with advanced manufacturing scale. We provide fast prototyping, scalable production, and responsive technical support to ensure your contamination-sealing needs are met with precision and reliability. Contact Polypac to specify a Contamination Seal optimized for your operating conditions.

Contamination Seal 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.

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.

When should I use a spring-energized seal instead of a standard elastomeric seal?

Consider a spring-energized seal (e.g., GSF, SPN types) for demanding applications involving: Extreme Temperatures (below -30°C or above +200°C) Aggressive Chemicals that elastomers can't handle Very Low Leakage or "Zero Leakage" requirements Poor Lubricity or dry running conditions The internal spring maintains constant sealing force, compensating for wear and system variables.

Table of Contents

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Polypac Contamination Seal Solutions
Materials & Specialty Fillers
Custom Design & Manufacturing
Testing, Quality & Research Collaboration
Applications & Industry Benefits
Why Choose Polypac
Contamination Seal Display

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