Sealing Excellence, Securing Industry

CFKS Hydraulic Cylinder Piston Rod Oil Pneumatic Seal Polyurethane Hydraulic Oil Seals UN Seal Blue TPU PU Oil Seal

High-performance Polyurethane Hydraulic Oil Seal (UN Type) made of durable TPU for piston rod sealing in hydraulic cylinders. Designed for excellent wear resistance, low friction, and reliable sealing in high-pressure pneumatic and hydraulic applications.

Brand Name CFKS OEM  Accpetable
Material NBR FKM Silicone  Features  wear resistance
Dimensions Customized Certificate  ISO9001/TS16949
Type UN Oil Seal  Packing 1 pc per bag

 

🔹 Precision-Molded UN Hydraulic Oil Seal for Piston Rods
The UN-type Polyurethane Oil Seal is a widely used sealing solution for hydraulic cylinder piston rods. Crafted from high-strength blue TPU (Thermoplastic Polyurethane), it offers outstanding mechanical strength and resistance to high pressure, making it ideal for demanding hydraulic and pneumatic systems. The UN seal’s double-lip profile ensures superior fluid retention and prevents oil leakage in dynamic applications.

 

🔹 Durable TPU/PU Oil Seals for Hydraulic and Pneumatic Systems
These TPU hydraulic seals are ideal for both mobile and industrial equipment, where oil and air sealing are critical. Thanks to the unique material composition, CFKS’s PU oil seals exhibit excellent abrasion resistance, chemical stability, and low compression set. Whether you’re replacing OEM seals or customizing components, our Polyurethane UN Seals deliver long-lasting sealing performance for hydraulic cylinders, pumps, and valves.

🔹 Application Versatility Across Hydraulic Cylinders and Pneumatics
CFKS hydraulic cylinder oil seals are compatible with a wide range of machinery, including construction equipment, presses, injection molding machines, and automated industrial systems. Their compact design supports easy installation and stable operation even under high-speed, high-pressure conditions. If you need a PU oil seal that withstands wear, chemicals, and hydraulic fluids, CFKS’s UN series is the trusted choice.

Frequently Asked Questions (FAQ)

Why does my CFKS oil seal fail prematurely? Common causes and prevention tips2025-06-26T15:44:39+08:00

Premature oil seal failure can result from improper installation, poor shaft finish, incorrect material selection, or excessive pressure. To prevent this, ensure the shaft surface is smooth and within tolerance, use correct tools during installation, and choose seals made from materials compatible with your media and temperature.

How to correctly install a CFKS industrial oil seal to avoid leakage2025-06-26T16:04:32+08:00

Always clean the shaft and bore before installation. Use appropriate seal drivers to avoid deformation. Lubricate the lip before fitting to reduce friction during the first rotation. Ensure the seal is seated evenly and not tilted to avoid leaks.

What to do when your CFKS hydraulic seal is leaking under pressure2025-05-20T16:33:14+08:00

Check if the pressure exceeds the seal’s rated limit. Examine for wear, hardening, or improper installation. Replace the seal if damaged, and consider upgrading to a high-pressure CFKS seal variant. Also, verify that the housing and shaft are properly aligned.

How to choose the right CFKS oil seal for extreme operating environments2025-05-20T16:34:39+08:00

For high temperatures, aggressive chemicals, or abrasive environments, choose CFKS seals made of FKM, PTFE, or high-performance elastomers. Consider using seals with protective dust lips or metal casing. Our team can recommend the best fit for your application.

 

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