Polypac Rod Seals — Wholesale Bulk Rod Seals for Hydraulic Systems

Polypac offers durable rod seals in wholesale bulk with customizable materials (NBR, FKM, PTFE, FFKM). Factory-made, tested, and ideal for hydraulic cylinders and special working conditions.

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Product Information

Polypac Rod Seals — Wholesale Bulk Solutions

Polypac supplies high-quality rod seals in wholesale bulk for hydraulic and pneumatic systems. Built on decades of seal expertise, our rod seals combine durable materials and precise manufacturing to reduce leaks, extend component life, and lower maintenance costs.

Why Choose Polypac Rod Seals?

Reliable performance: Made to withstand pressure, abrasion, and repeated motion.
Wide material range: Available in NBR, FKM, silicone, EPDM, FFKM, and PTFE blends.
Custom options: Sizes, hardness, and compounds tailored for special working conditions.
Factory scale and quality: Polypac’s 10,000+ m² facility with advanced testing ensures consistent supply and performance.

Materials and Applications

We began in 2008 producing filled PTFE seals (bronze, carbon, graphite, MoS₂, glass) and have expanded to rubber O-rings and rod seals. Choose NBR for general hydraulic use, FKM for heat and oil resistance, EPDM for weather and water, silicone for temperature flexibility, and FFKM for extreme chemical environments.

Practical Benefits for Bulk Buyers

Buying rod seals in bulk from Polypac lowers unit cost and secures steady supply for production lines and maintenance teams. Our bulk options include standard sizes and custom runs to meet specific tolerances. Fast lead times and stable inventory support large projects and repair shops.

Quality, Testing, and Collaboration

Polypac’s production and testing equipment are among the industry’s best. We work closely with universities and research partners to develop better sealing materials and solutions. Every batch goes through strict inspection to ensure you get reliable parts every time.

Whether you need standard rod seals or a tailored sealing solution, Polypac offers professional support and competitive wholesale pricing. Contact us to request samples, spec sheets, or a bulk quotation.

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FAQ

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.

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.

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 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.

If you have any questions about our goods or services, please feel free to contact us.

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