Sealing Excellence, Securing Industry

CFKS USI Oil Seal 30*40*6 Hydraulic Piston Rod seal Polyurethane Oil Seal

The CFKS USI Oil Seal 30×40×6 is a polyurethane hydraulic rod seal designed for stable sealing performance. 30-40-6 It offers excellent wear resistance, oil resistance and long service life, ideal for hydraulic cylinders and industrial machinery. CFKS USI Oil Seal 30*40*6 | Hydraulic Piston Rod PU Seal | High-Quality USI Hydraulic Oil Seal.  Find your sealing solution with CFKS — contact us for a quote.

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

 

The CFKS USI Oil Seal 30×40×6 is designed for hydraulic piston rod systems requiring high sealing efficiency and durability. Made from premium polyurethane (PU), it provides outstanding resistance to wear, hydraulic oil, high pressure and harsh operating environments.

This USI hydraulic rod seal offers excellent elasticity and long service life. Its precision sealing lip ensures stable performance, prevents leakage and protects your hydraulic cylinder components. The optimized friction balance enhances smooth rod movement and extends equipment lifespan.

CFKS provides customizable USI PU oil seals for various industrial hydraulic cylinders, machinery, engineering equipment and pneumatic systems. Multiple sizes and materials are available to meet OEM, aftermarket and heavy-duty working conditions.

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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