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

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Polypac Rod Seal Replacement

Polypac rod seal replacements deliver reliable, long-lasting sealing for hydraulic cylinders. Available in PTFE, NBR, FKM and custom sizes. Advanced production, strict testing, and fast support.

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Product Description

Polypac Rod Seal Replacement

Polypac rod seal replacements are engineered to keep hydraulic cylinders leak-free and performing at peak levels. Built from high-quality materials and backed by advanced production and testing, our rod seals offer dependable sealing for a wide range of machines and harsh conditions.

Why choose Polypac rod seals?

Durable materials: available in PTFE variants and elastomers like NBR, FKM, EPDM, silicone and FFKM for different temperatures and fluids.
Precise fit: custom sizes and close tolerances ensure smooth installation and long service life.
Proven quality: manufactured in our 10,000+ m2 facility with leading equipment and strict inspection.
Fast support: technical advice and quick turnaround for replacement needs.

Key benefits

Reduced leakage and downtime: excellent wear and extrusion resistance keeps systems clean and efficient.
Wide compatibility: suitable for agricultural, construction, industrial and mobile hydraulics.
Cost-effective: longer life and fewer failures lower maintenance costs over time.

Materials and options

Polypac started with filled PTFE products and now offers many material choices. For rod seal replacement we provide:

PTFE blends (bronze, carbon, graphite, MoS2, glass-filled) for high-pressure and high-wear applications.
Elastomers (NBR, FKM, EPDM, silicone, FFKM) for flexible sealing and chemical resistance.
Custom compounds on request for special fluids or extreme temperatures.

Easy replacement and service

Our seals are designed for straightforward installation. We supply clear sizing guides and replacement recommendations to make the swap quick and reliable. If you need a tailored solution, our R&D team collaborates with universities and labs to develop specific seals for unique working conditions.

Polypac combines decades of sealing expertise with modern manufacturing. Whether you need a standard rod seal replacement or a custom-designed solution, we deliver quality, durability, and fast service. Contact us for samples, technical support, or a quote today.

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Q&A

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.

How do I choose the right material for my sealing application?

Material selection depends on four key factors: Media: What fluid or gas will the seal contact? (e.g., petroleum oil, water, chemicals, steam) Temperature: What is the minimum and maximum operating temperature? Pressure: What is the system's operating pressure? Are there pressure spikes? Application: Is it a static, dynamic, or rotary seal? Example: NBR (Buna-N) is excellent for standard hydraulic oil, while FKM (Viton®) is needed for high temperatures or aggressive chemicals.

Why did my O-ring fail prematurely?

Common causes of O-ring failure include: Chemical Incompatibility: Swelling, softening, or cracking due to fluid exposure. Improper Sizing: Using an incorrect size leads to over-compression or inadequate sealing force. Abrasion: Wear and tear from rough surface finishes or contaminated fluid. Extrusion: The seal is forced into the gap between metal parts under high pressure. Installation Damage: Nicks, cuts, or twists during assembly.

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.

Get In Touch With Us

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dbde24e1-4012-47b6-8db4-e89ee4ca5a70

Polypac Industrial Technology Co.,Ltd

+86 189 2463 6168

rose@dmsseals.com

No. 5, Hegui Mid Road, Hegui Industrial Park, Lishui Town, Nanhai District, Foshan City, Guangdong Province, P.R. China.

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